my digital camera battery charger

petak, 27.04.2012.

ESR, stabilnost i LDO regulator

Kao Slika 1 pokazuje tipične PMOS ili PNP otvorena petlja dobiti što je prikazano na grafu, na temelju PMOS ili PNP LDO regulatora za podešavanje komponente ima tri važne stupove. P glavni stupovi (DOM) postavljen u pojačalo kontroler pogreške. Učitaj p (LOAD) formirane od strane izlaznog kondenzatora i opterećenja, a time će se razlikovati s struje opterećenja. Uređaj za pristup pol p (PASS), osnovan od strane parazitskih kapaciteta na put komponente. Kako bi se osigurala stabilnost bilo koje negativne povratne informacije sustava, sustav otvorene petlje dobitak fazi za 360 ° bi trebao biti ispod 0 dB (180 ° i 180 ° šalje signal pogreške pojačalo Nikon D3 Battery Charger sa reverse faze unosa). Drugim riječima, sustav mora imati punu granice rubnih faze, što znači da faze prebacuje debljanje je 0 dB na 360 °. Budući da svaki pol će imati 90 ° fazni pomak i 20dB/10 množilo frekvencije (OR-1) dobitak svitak dolje, tako da bi se osigurala stabilnost tropolni visoke pojačanja sustava, trebate nadoknaditi. Ako otvorene petlje dobitak krivulja do 0 dB za frekvencije 20dB/10 udvostručenje prije valjanja smanjenje brzine (drugim riječima, baš kao i single-pole sustava), a zatim smo reći da regulatori koji su stabilni u uvjetima (to jest, imaju dovoljno granica faza granica). Kompenzacijske metode su najčešće ubaciti nule u sustavu otkaza fazni pomak i pomaknite dolje jedan kolac. Zbog LDO ima normalan rad zahtijeva izlazni kondenzator, pa pomoću izlaznog kondenzatora ESR je često najjednostavniji i najjeftiniji način da se generiraju nula.

Slika 1 tipičnu otvorena petlja odgovor PMOS ili PNP LDO regulator

Izazov je odabrati kondenzator s ispravnom obujma ESR. ESR mora biti dovoljno visoka kako bi se smanjila Z (ESR) frekvencije, čime se osigurava kose crte do 0 dB pojačanja promjenu -20dB/10 frekvencije udvostručenje, umjesto -40dB/10 multiplikator (-2), ali to je dovoljno niska kako kako bi se osiguralo da je z (ESR) frekvencija dovoljno visoka, tako da je dobitak u p (PASS) ostvaren prije 0 dB.

Većina podataka u obliku regulatora u TI, određuje minimalnu vrijednost kondenzatora, i daje izlazni kondenzator (obično postoji još jedan kondenzator) i ESR proizvodnje struje. Slika 2 prikazuje tipičnu krivulju TPS76050.

Slika 2, tipična ESR-of izlazna struja

Krivulja uređaja na minimum 2,2-ESR kondenzatora zahtjeva mora biti 0,1 Ľ f izlaz između 20 i Ę Ę. Kondenzator ESR ne više od 2 ohma, maksimalno ESR obično može ignorirati. Donja zapravo postavlja z (ESR) maksimalno. Slika 2,2-2 dati mju f kondenzator, z (ESR), najveće su vrijednosti kako slijedi:

Z (ESR) = 1 / (2 × Ŕ × R (ESR) × CO) = 72,3 kHz

Stoga, bilo veće od 0.1x2.2 x 10-6 = 2,2 x 10-7 (ali manje od 20x2.2 x 10-6 = 4,4 x 10-5) kapacitivnost i ESR proizvoda, pod uvjetom da je kapacitetom je veća vrijednost od minimum, a sve je stabilno. Slika 3 prikazuje krivulja odražava. Koristite veći kondenzatori LDO regulator s niskim ESR je stabilan. U stvari, veći kondenzatori i / ili mali ESR vrijednost može povećati izlazni dinamički odziv.

Slika 3 izlazni kapacitet ESR-primjeri

Slika 4 prikazuje opći oblik krivulje kondenzatora impedancije. Kondenzator start-kondenzator (XC), a zatim u blizini svoje rezonantne točke otpora (ESR), i na visoke frekvencije s električnim indukcije (XL). Krivulja (Z) impedancija je kombinacija svaki od tih komponenti.

Slika 4, opći oblik krivulje kondenzatora impedancije

Maksimalne ESR Kondenzatori su obično usmjerena na određenu frekvenciju kako bi se utvrdilo. Frekvencija je obično između 10 kHz i 100 kHz, a nalazi se u blizini rezonantne točke. Kako bi se osigurala najmanja ESR kondenzatora nije manja od najniže ESR zahtjevima, dizajneri trebaju osigurati zahtjeve proizvođača pristup ESR-frekvencijskog krivulje cjelokupnog Panasonic DMW-BCJ13PP Battery Charger relevantnog temperaturnom području. Neki proizvođači mogu pružiti ove informacije. Ako je impedancija krivulja je dostupan, tako da se zaustavi ide niz krivulju i držati na razini regije je kapacitet od kondenzatora ESR odlučio staviti.

Mi također može biti malih low-ESR keramičkih kondenzatora i otpornika od spojene zajedno. U otpornici mora biti u stanju da se prilagode temperaturi, može održati svoju stabilnost krivulje u licenciranju vrijednosti.

Opterećenjem i promatrati izlaz prolazno oscilacija određuje se prema odabranoj kondenzator je najbolji način da se stabilnost. Slika 5 pokazuje MOSFET sklopke i generator funkcije za ispitivanje tereta prolazne ispitne set. Ova postavka se odnosi na većinu elektroničkih opterećenja, jer je prolazan simulacija je mnogo brže.

Slika 5 postavku, učitavanje prolazna

Slika 6 prikazuje keramike s 2,2-mju f (low-ESR) Rezultati mjerenja na TPS76050 jedinice kondenzator. Slika 7 prikazuje s 2,2-mju f keramičkih kondenzatora i 1 M© otpornik u seriji mjernih rezultata TPS76050 uređaja. Rezultat na slici 6 prikazana je jeku i nekoliko puta nakon početnog vrha puls titranja, a JVC BN-VF823 Battery Charger rezultati na slici 7 prikazana je stabilnost opterećenja tranzijenata. U principu, četiri ili manje oscilacije odražavaju faze dovoljno tolerancije, opremu za održavanje stabilnosti.

Slika 6 TPS76050, s 2,2-mju f keramički kondenzator opterećenja tranzijenata

Slika 7, s 2.2-1 Ę i mju f keramike ESR kondenzatora TPS76050 opterećenja tranzijenata

27.04.2012. u 02:37 • 0 Komentara • Print • #

ponedjeljak, 26.03.2012.

Tri vrste za uštedu energije elektronske dodir, prekidača

Nakon pojavljivanja na tržištu u različitim elektroničkim sklopkama (uključujući produženo prekidač) za analizu i ispitivanje, Otkrio sam da je sklopka ima više od šest stotina ili sedamsto rasipanje MW, elektronski prijelaz statički potrošnja energije godišnje, svaki u 5, 6 ili više. Svake godine, svaki proizvođač proizvodi puno za ljude da koriste taj argument, znaš koliko otpada. Za to koristim Općenito malog trenutnoj pokrenula Crystal vrata cijevi (kontrola je vrlo pokrenuti trenutni je malo mogućnosti , potaknuta struja više je manje od 200 Ľ-a, trenutno nazivne struje za 1-ove kristalno vrata cijev cijena samo četiri ili pet kose novca), dizajn odluka ima tri vrste praktične elektroničke touch prekidačem, ovaj prekidač ima nekoliko krug jednostavna, a cijena niska, a dijelovi lako kupiti, a rade pouzdan, i pomoću jednostavne, svojstva, glavni više od nije bilo statičke snage ili samo vrlo mikro-moći. Kada koristite nikakvu potrebu da se razlikovati dvije igle, može biti povremeni i električni aparat lampa ili serije, samo obratite pozornost na cijeli prekidač mora biti spojen na mrežnu liniju. Ove vrste prebacivanje je više obiteljskih jedinica i gotovo godina normalne uporabe.

,Nema statički potrošnja elektroničkog dodir, prekidača

Trenutno, većina e-touch prekidači su potrebni u dizajn interijera za prebaciti na DC niskog napona radne snage, ovaj sklop ne samo komplicirana i statički potrošnja energije.

E-touch prekidač s tehničkog rješenja je: Most ispravljačke diode, jednosmjerna TIRISTORA i tranzistori, otpornici, kondenzatori i dirati metal sastav elektronske touch prekidačem, osjetljiv na dodir na kontroli se postiže kroz mali trenutni JVC GZ-MG50 Battery Charger pokrenuti TIRISTORA . Prije svega diode ispravljača postane jednosmjerna puls AC kabel za struju, kroz jednosmjerne TIRISTORA kontrolirati moć za uključivanje / isključivanje, dodir otvorene kontroliraju male struje tiristora potaknuti uključivanje / isključivanje kontrole TIRISTORA anode i kontrole između Touch. otvoren lima kroz tekuće ograničavanja otpornika priključen na malim strujama na okidač tiristora kontrole.

Ovaj prekidač može biti u nedostatku svakom slučaju statičkog potrošnje električne energije, za kućanskim aparatima u određenom AC moći osjetljiv na dodir za uključivanje / isključivanje kontrole rasvjete.

Slika 1. Shematski komutacijski sklop. Predstavljaju dioda mosni ispravljač i tiristora uključivanje / isključivanje kontrole VS1.
Male trenutni pokreću TIRISTORA VS2 provedbe dotiče kontrola, tranzistori VT provedba dodirnuo off kontrolu. Kondenzator C2 kroz otpornik R2 VS1 između vrata i katode, VS1 jednom potaknuta TIRISTORA vodljivost može ostati na. Normalne VS1 i VS2 TIRISTORA u off-države, Cijeli sklop nema nikakvu moć. Kada je tijelo (prstiju) dodiruje metalnu m je, tijelo je očitavanje signala VS2 kondukcija, rezultat VSl okidač struje vodljivost, električna rad. VS1 nakon provođenja, VS2 nije radni napon, što odgovara C2 kondenzator napon od oko 0. 8V. Kada trebate isključiti struju, dotaknite metalnu m, VT odgovara tranzistor prekretni, C2 naknade su objavljeni na, VS2 u AC napajanje nula shutdown. Smetnji otpor kondenzatora C1 i C3 na slici. Zbog mosta ispravljača i tiristora upravlja, osigurava da je protok kroz električne struje sinusna, a time i primjenjivati na sve električne energije kontrole.

Ispravljačke diode i VS1 određuje veličinu električnog opterećenja pod kontrolom, kao što je dioda koristi 4 1N4007, VS1 koristiti 2A600V, a zatim pod kontrolom električnih opterećenja do 200W. VS2 ili CR02AM ili MCR100-6. Tranzistora VT S9011. Otpornici R1, R2, 56k, a 1K, R3, odnosno R4 je 2M, vlast je 1/16W. kondenzator C2 je 4. 7 Mu F/10V elektroliza, C1 je 0. Pločice 1 Ľ F, C3 je 0 mju 022 f. pločice. Osim toga na dodir metala izvana, cijeli sklop se može zavarene u 4cmx2. 5cm na tiskanih pločica. prekidač pločica i tiskane pločice kao što je prikazano na slici 2, slika 3. napraviti svjetiljku s Ovaj prekidač kao što je prikazano na slici 4.. Izrada e-touch sklopke na oba kraja pisac usporedo normalan elektroničku ploču prigušivanja osvjetljenja kruga, s kontrolna lampica, tako da ovaj stol svjetiljka sa zaslonom osjetljivim na prekidač i zatamnjenje dvije funkcije.

Samo jednostavne promjene, VT ukloniti tranzistora, otpornika R4 i komade metala m, zbog promijeniti otpor R1, C2 i otpornika R2, kapacitivnost parametar tiristora Panasonic PV-GS29 Battery Charger VS1, uključite statički potrošnju energije osjetljiv na dodir, bez ekstenzija može izdati. Drugi, statički potrošnja energije u mynewly kontaktu produženo prekidač

Ovaj prekidač na dodir proširio iz statičke karakteristike potrošnje energije je minimalan. Mirna struja oko 55 ĽA, oko 12mW rasipanje snage, niz godina statičke potrošnje energije je samo oko 0. 1, više od postojećeg dodir-98% prebaciti i smanjiti kašnjenje van. strujni krug kao što je prikazano na slici 5, VS1 i VS2 su jednosmjerni TIRISTORA. VS2 okidač mali trenutni TIRISTORA. Nakon VD1 ~ VD4 mosni ispravljač dioda, AC u pulsirajuće istosmjerne struje, dodao je izravno na sve puta između VS1, Yang i katode i anode, s druge strane kroz otpornik R1 plus sve do na VS2. Budući da ne pokreće signal, VS1 i VS2 u off-države. Kad tijela (prstiju) kada dodirnete metalni m, VS2 indukcija signal provođenje ljudskog tijela, rezultati VS1 Prekretni, električna svjetla elektro-luminiscencije. Zbog C2, VS1 će ostati on-države, ovo je jedinstvena stvar o ovom opcijom. Diode VD5 uloga podizanje napona na kondenzator C2. Nakon VS1 prekretnom, C2 mjerenje napona od oko 1. 6V. Taj napon preko otpornika R3 na C4 kapaciteta punjiva. Nakon određenog vremena, odgovarajući tranzistor VT1 Prekretni, C2 naknade su pušteni na rezultatima, VS1 zatvorena, svjetla. Prema lik R3, C4 vrijednosti, mjereno proteže se 61 sekundi protiv smetnje kondenzator C1 i C3 su u.

Tranzistor VT2 osigurati pražnjenje kondenzatora krug za C4, kada je nakon završetka proširene van, VS1 globus, DC valovitost napona 220V preko otpornika R1, R7 i VT2 baze, VT2, zasićenih ponude, C4 pristojbe na što quick-release, spreman za proširena out again. osjetljiv na dodir prekidač s nastavkom opterećenja od veličine određuje VS1 i VD1 ~ VD4 dioda. VS1 1A600V, VD1 ~ VD5 1N4007, snage 100 W žarulja. VS2 s malim MCR00-6. R1 ~ ka R8 otpora otpora 100k, 2, respektivno. 2k, 220k, 1. 5M, 1. 5M, 2. 2k, 3. 9k, 39k, snaga 1/16W. C1, C3 za keramičkih kondenzatora, kapacitet 0, respektivno. 1 Ľ i 0. 01Ľ. C2, C4 za elektrolitički kondenzator, 4, odnosno 7. 470 Ľ i Ľ/25V/16V. Sve Elektronika trošak oko 1. 47 dolara. 86 ovog kruga u zidnu prekidač kao što je prikazano na slici 6, 7.

Tri, statički potrošnja energije je osjetljiv na dodir besplatno u nastavcima izvan prekidača

Taj dodir uključite proširenje vani nije statična potrošnja energije. Električni krug kao što je prikazano na slici 8. Kao na slici R8 nizu u malom kondenzator C5 kapaciteta napona 400V, obično ne postoji statički struje. Svaki put odgode je stavljen u Tečaj ovog malog kapaciteta kroz R8, R9, pražnjenje, ostruga puštena nakon pulsirajući DC više od više od 200 volti do ovog malog kapaciteta Fast Charge Nakon što zbog VT1 i VT2 vođenja, napon na C4 brzo Nikon EN-EL15 Camera Battery će pasti na 0. . 6V, ne naplaćuje off na C5, za ovog malog kapaciteta serije dok tisuće zakona, C5 u slici 3900pF/500V. VT1 i VT2 Tranzistor predstavljaju simulaciju jednosmjerne TIRISTORA, jednom provođenja, brzo zasićenje, odgovara C2 naboj brzo je pušten na, rezultati VS1 brzi shutdown. Kao rezultat simulacije jednosmjerne TIRISTORA, pokrenuti trenutni minimalni, manje od 1 ĽA, R3 otpor može napraviti velika, C4-može biti vrlo mali, C4 naknade na R8 grani struja također se može smanjiti sukladno tome. VT3 ako tranzistor je veći od 50, C5 kapaciteta i smanjuje trenutni uvećanja. Kroz pokuse, C5 se 2200pF, R8 se 3. 3 m također radi. R3 na slici 1. unos. 5M, C4 dobiti 100 mju f, staviti izvan vremena odgode mjeri 68 sekundi

26.03.2012. u 03:16 • 0 Komentara • Print • #

petak, 24.02.2012.

Uzemljenje tipa niskog napona snage distribucijskog sustava

GB 13955-2005 od strujne zaštitne uređaje instaliran i pokrenut u, kada je rezidualna struja zaštitna naprava za neizravno izloženosti električnim obranu šok nesreće, treba pravilno i elektroenergetskog Panasonic CGA-S002A Battery Charger sustava, s uzemljenjem utakmica, bilo je nužno uvesti niska -napona snage distribucijskog sustava-uzemljenjem značajke kako bi se olakšalo ispravno instalacije strujne zaštitne naprave.

Kina je struja niskog napona distribucijski sustav uzemljenja TN, TT sustavima, IT sustava od sustava tipa.

1 TN sustav

Izravna uzemljivača sustava, izložen u blizini vodiča kroz liniju zaštite električnih instalacija i spojen na Zemlji točke.

TN sustavi su podijeljeni u TN-S, TN-C, TN-CS tri.

(1) TN-S sustav: odvojeni neutralne linije i linija zaštite za cijeli sustav, kao što je prikazano na slici 1..

(2) TN-C sustav: neutralna linija i linija zaštite za cijeli sustav, kao što je prikazano na slici 2..

(3) TN-CS sustav: Sustav je dio neutralne linije i linija zaštite je u jednoj od linija, kao što je prikazano na slici 3..

2 TT sustav

Izravna uzemljenja elektroenergetskih sustava, električna oprema izložena u blizini zaštitne zemljovoda kroz liniju na lokaciji samostalno uzemljenje i električni sustavi, kao što je prikazano na slici 4..

3 informacijskog sustava

Energetski sustavi nisu izravno povezani sa Zemljom, izložen u neposrednoj blizini vodiča električnih instalacija, preko zaštitnog uzemljenja i uzemljenja veze, kao što je prikazano na slici 5..

4 karakteristike uzemljenja sustava analize

Iznad prizemlja sustav ima svoje značajke i prednosti i mane, bilo je potrebno imati cjelovit uvid, da odaberete ispravno.

4,1 TN-S sustav

Iz slike 1, u TN-S sustav u cjelini, PE i N linija je podijeljena u dvije paralelne žice koje se ne sijeku.

Tijekom normalnog rada, PE linije ne prolaze struje, bez potencijala. Tek kada dođe do greške, struja kvara će biti donesen, čime se izloženi u blizini vodiča električnih instalacija, u normalnom radu bez potencijal, visoku sigurnost i pouzdanost sustava. Ali to zahtijeva polaganje žica duljine u krug.

4,2 TN-C sustav

Na slici 2, PEN linije i nalazi se u TN-C sustavu za PE i N linija, može uštedjeti žice, ekonomičniji. Prošlost pojam kao što je predviđeno u točki bivšeg Sovjetskog Saveza, naširoko koristi u sustavu. No, iz električne sigurnosti, ovaj sustav ima veći problem.

(1) kad je sustav jednofazni spoj, PEN redaka, oprema metal ljuska s probojnog napona od 220 V, kada je osobni dodir, rizik od električnog udara znatno smrti. Napon 220 V krug prikazan na slici 6 crtica.

(2) kada je ugradnja strujne zaštitne naprave, PEN linija kroz strujne zaštitne naprave, od magnetskog polja Zemlje struje kvara, fazni pomak unutar strujne zaštitne naprave za strujne zaštitne naprave odbio da se presele, pa ne može se učitati u TN-C sustavu za strujne zaštite uređaja na fizičkim udarcima.

(3) pri obavljanju elektro održavanje, jedan s četiri pole prekidačem greške mogu pojaviti odsječeni na neutralnom žicom napona. Nije dopušteno jer je PEN skladu s PE skladu je isključen, tako da je TN-C se ne može učitati u sustav s četiri pole prebacivanje, kako bi se osigurala sigurnost osoblja održavanja.

(4) PEN linija i neutralne žice, pad napona, tako da je metalno kućište od uređaja na području potencijala. Potencijal mogućeg miješanja s elektroničkom opremom, također može otpustiti aktivirao u roku od eksplozije opasnih područja. Prema standardu, eksploziva na Nikon Coolpix S80 Battery Charger mjestu je ne dopustiti u TN-C sustav i PEN-line. Osim toga, uređaji su u kontaktu s potencijalnim i lutajućih struja u metal može biti proizveden u, do određenog stupnja korozije na podzemne cijevi metalnih konstrukcija.

Neki sigurnosti kao rezultat ovih faktora, osim u mjestima izvan održavanja višu razinu upravljanja, a sada rijetko se koristi TN-C sustav, posebice novi dizajn niskog napona sustavom uzemljenja, opće korištenje TN-CS sustav odnosno TN-S .

4,3 TN-C-S sustav

Iz slike 3, TN-CS sustav, od vlasti do korisnika između električnih uređaja, spremite se namjenski PE liniju. Ovaj pad napona od PEN na liniji cijeli napon električnih uređaja u porastu UPEN. No, zbog električnog uređaja koji se sastoji od ukupno izjednačenje potencijala i snage u zasebnom PE i N linija nakon liniju, PE linije ne imati pad napona, cijela električna instalacija UPEN na potencijal zemlje, razlika potencijala se ne pojavljuje u uređaju, tako da sve vrste nesigurnih faktora u TN-C sustav ne dogodi. Električne instalacije u zgradama, njegova sigurnost i TN-S sustav je sličan, to je također ne uzrokuje smetnje elektroničkih uređaja.

Potrebe na znanje je, IEC standardni zahtjevi u vlasti u točaka linije izvana (kao što su ukupne distribucije izvan okvira) PEN linija mora prvo primljenih PE majka redak, te povezivanja odbora (linija) dobila neutralnu redak line majka, kao što je na slici 7 je pokazuje , to je zato što ako veza odbor (linija) vodljivi loše, neutralna linija krug ne prođe, uređaj ne radi, greška može biti pravodobno pronašao popravak ne javlja električni nesreće. Kao što su PEN-n sabirnice, ako su siromašni vodljivi spoj ploče, uređaj na uređaju u cjelini izgubio tlo PE linije, dok je uređaj još uvijek radi, opasnosti neće biti pronađena. To je vrlo štetno za osobnu sigurnost i sigurnost su najvažniji.

Bilo u TN-CS sustav, ili TN-S sustava, TN-C sustava, u kontekstu istog napajanja, svi PE, PEN linija spojena, PE linije, PEN u jedan TN sustava kvarova na naponu , može biti cross-kanaliziranje preko uređajima, izjednačenje potencijala mjere koje treba poduzeti protiv njih, kako bi se izbjegle nesreće uzrokovane provođenje kvara napon.

4,4 TT sustav

Na slici 4, TT sustav električni aparat ima svoju vlastitu zemlju, izloženi dostupne vodljivih dijelova uređaja u normalnom potencijal zemlje, probojni napon od strane napajanje i uređaja nema ni cross-kanaliziranja. Ali kada dođe do greške, greške se sastoji od dva otpora uzemljivača u krug, fault loop impedancija velika, manje struja kvara, uglavnom ne može se koristiti za uzemljenje kvara zaštitu i prekostrujne zaštite, mora biti popunjeno sa strujne zaštite uređaja odsječen napajanje. GB 13955-2005 izričito propisano je da u TT sustavima, ugradnja strujne zaštitne naprave.

4.5 Informacijski sustavi

Na slici 5, IT sustav struje kvara kada dođe do greške, jer nema snage da se vrate put, struja kvara je samo za non-fault-faznih kapacitivnih struja, njegova vrijednost je vrlo mala, ima vrlo nisku probojnog napona, a ne bačena. Dakle, kada dođe do greške, bez dovoda JVC AA-V35U Battery Charger napajanja i nestanka struje. Ali, to obično ne izvedeš žice neutralan, ne može pružiti jedan s struju 220 V opskrbe, kao što su rasvjeta, upravljanje, održavanje i upravljanje složenijim i njegove krivnje i zaštite, uz druge razloge, njegova primjena je ograničena.

24.02.2012. u 02:08 • 0 Komentara • Print • #

ponedjeljak, 30.01.2012.

Groznica je započeo popularizacije kazališta Pojačala svibanj ne znaju parametar

Trenutačno, HD je postao popularan elemenata, HDTV, HD filmove, HD kamere, HD kamkorderi, HD DV, i tako dalje, ima nesvjesno u naš svakodnevni život. Snaga pojačala, kao važan dio kućnog kina i, naravno, moraju HD nadogradnju.

Ako je to linija, onda je trenutno dostupna proizvodi uglavnom su podijeljeni u dvije razine, jedna je podržati sljedećom generacijom HD pojačalo snage, pojačalo je DVD-doba Općenito. Naravno, takva klasifikacija nije vrlo znanstveno i potpuna, jer je raspon pojačalo snage, a ne klase prikladan samo AV pojačalo. U skladu sa svrhom, mi općenito se može Nikon EN-EL3E Battery Charger podijeliti u tri široke kategorije: PA, civilne pojačalo za stručne, posebno pojačalo. Stručni pojačala se obično koriste za sastanke, Ured za obavljanje pojačala. Civilni pojačalo razgradnju i hi-fi pojačalo, AV pojačalo, KALA redu PA i niz zajedničkih osobina skupa u jednom od tzv integrirano pojačalo. HI-FI pojačalo je podijeljen u "Split" i "spojiti".

Sam pred toliko kategorija pojačalo snage, čak i geeks imaju glavobolju, a kamoli prosječnog potrošača. I svaki proizvod ima desetak poznati brand proizvođača u području baikuan na desetke proizvoda, nepoznati su još brojni, suočeni s toliko proizvodima suživot, ako ne znate, želi kupiti ne znam kako početi s. Spomenuti bi također trebali biti svjesni njihove parametre, svojstva, ciljeve, i tako dalje, da je stvarno jako teško, jer svaki proizvod ima svoje standarde u tom području, a svaki proizvođač ima svoje vlastite standarde.

AV pojačalo

AV pojačalo, audio, audio, kao svoje ime sugerira, v predstavlja zvuk, sliku, pa AV pojačalo je okupiti i audio i video obrada signala za audio pojačala, uglavnom za snimanje izvor kompatibilan, a proizvode audio i video efekte, stvoriti zvučno polje za dizajn svrhe, posebno za kućno kino uporabu.

Kroz svoje unutarnje kašnjenja, reverb krugovi obrade za kontrolu reprodukcije vrijeme kašnjenja između svakog kanala kada podešavanjem duljine vrijeme odgode pod različitim sredinama slušanje oponašati zvučno polje. Hi-Fi Hi-Fi pojačalo specifikacije su uglavnom izlazne snage, harmonijskog izobličenja, omjer signala i šuma, Impedancija i prigušenja koeficijenti frekvencije, i tako dalje, posebnim naglaskom na harmonijskog izobličenja i omjer signala i šuma i AV pojačalo, a sve Ove specifikacije, ali više naglasak na kanalu izolacije, vrijeme odgode varira, različitim pokazateljima kao što su zvučni parametri polje rada.

(1) codec

Home Theater Surround zvučni sustav je jezgra sustava. Sustav surround zvuka, kako bi se postigao učinak kino u obitelji. Surround zvučni sustav je višekanalni sustav reprodukcije, format postoje mnoge vrste, različitih formata imaju različite značajke i trenutni pojačalo kanala broj sve više i više, ne samo da imaju 5,1, 6,1, 7,1, 8,2, itd.

Mi svi znamo, 5.1-kanalni općenito se odnosi na Dolby Digital 5.1, i dvije digitalne višekanalni surround zvuk format. 6.1-kanalni Dolby Digital EX i dva DTSES digitalni višekanalni surround zvuk format. To je 5,1 na osnovi, kako bi se lijevi i desni surround zvuk bolje povezivanje između povećane svi put leđa okružuju, ona formirana 6.1-kanalni format.

Što se tiče 7.1-kanalni se odnosi na THX Surround EX sustav, također ima Dolby Pro Logic II Dolby tvrtka x tehnologiji, koja može biti složen matrica rad na odvojene 2-kanalni audio za 7.1-kanalni obnovljena. THX je jedna od Lucas tvrtki na kino certifikata standarda, a ne audio format. Kada je 6.1-kanalni Dolby Digital EX i DTSES van, THX dalje razvijati u THX Surround EX sustav.

Kompatibilna na izvorni strani kanala dvosmjerne glasovne i osjećaj poboljšani surround zvučne efekte opet okružena, pa na temelju izvorne strane kanala se povećava dva stražnja kanala, što predstavlja 7.1-kanalni. Konačno, 8,2 kanali koji se trenutno koristi proizvodi nisu puno, to je kako JVC AA-VG1 Battery Charger bi se poboljšala surround efekta zvučno polje, DTSES i Dolby Digital EX 6.1-kanalni na temelju, što je povećanje od ekskluzivnih YAMAHA Front Surround, dodali su izlaz subwoofer, nakon što je Sredinom surround zvuka iz samo jednog kanala na dva dijela.

Niti jedan od tih su i razne okružuju dekodiranje format DVD-doba sustav, to će biti jasno, odaberite kanal broj više, omatanje više koherentan blisko surađuje, okružen jači. Do današnje generacije HD, moderno pojačalo snage će imati nove značajke i zahtjeve. Uz popis Blu-ray i HD-DVD, nova generacija višekanalni surround zvuk formata, uključujući i Dolby Digital Plus, Dolby True HD i DTSHD.

Dolby Digital Plus 7.1-kanalni kao polazište, učestalost uzorkovanja iz izvorne Dolby Digital 96-640kbps proširen na 32kbps-6Mbps, a najveći 13,1-kanalni digitalni surround i razvoj orijentiran. Na temelju MLP Lossless i Dolby True HD tehnologiji, sadrži veći bitrate, stereo mix od dodatnih kanala, poboljšana metapodatke podršku i širok spektar mogućnosti.

DTSHD slično 7.1-kanalni kao polazište, visok omjer podrške iznad 1.5Mbps, uzorkovanje frekvencije od 192 kHz 8-, sada general DVD video kompresije tehnologije kao što su 768kbps odnosu na DTSHD kvalitetu zvuka će biti značajno porasli. DTSHD toka podataka prema zahtjevima kvalitete zvuka i fleksibilan pretvorbe, od ekskluzivne bez gubitaka kompresija tehnike, DTS kompresije od manjih detalja, mnogo više bogatih pruža veću kvalitetu snimanja zvuka, maksimalne 32-kanalni surround izlaza.

Konačno, mi često kažu da simulacije zvučnog polja, kako YAMAHA DSP promicanje simulaciju zvučnog polja, također je ekskluzivni SONY Digital Cinema Sound, simulirani su surround zvuk kino i koncertne dvorane prostor karakteristike post obradu. Za senzorska pristup usporedbe razlika od većine ljudi misle SONY DCS više profesionalno usmjerena osjećaj surround zvuk, dok YAMAHA više usredotočiti na osjećaj otvorenog prostora, koji se može reći da vlastite snage.

(2) snaga podudaranje

AV pojačalo je u skladu s prioritetima vizualne efekte za stvaranje idealne slušanje okoliš, stvarajući vjeran položaj osjećaj, osjećaj TelePresence i strašan. Stoga, AV pojačalo dizajna u fokus brine više o jasnoću dijaloga i velikih dinamičkih audiovizualnih okoliš "uch" učinke, vratiti ili simuliraju zvuk slikarstva glasno na jednom mjestu, stvoriti atmosferu različitih zvuk. Na taj način, ne samo da zahtijeva AV pojačalo raspon frekvencija kao širok kao Panasonic DMW-BMB9E,DMC-FZ40/FZ45/FZ100,DMW-BMB9 Battery Charger moguće, niska izobličenja, omjer signala i šuma, prolazne osobine dobar, zvuk, lijep lijepa boja glasa, i tako dalje, i više usredotočiti na razina zvučnog tlaka: to jest, na premisi niske distorzije, čime se osigurava dovoljno izlazne snage.

Pojačalo izlazne snage jedinicama W (W), jer proizvođači mjerenja nije način, tako da postoje različite nazive. Na primjer, ocijenjeno izlazne snage, Max izlazna snaga, izlazna snaga glazbe, kao što je vrhunac proizvodnje glazba snage. High-end AV pojačalo snage za prednje kanala na 80W i iznad kako bi se ispunili zahtjevi 107dB razine zvučnog pritiska u kino.

Međutim, neki uvozni AV pojačalo, 5-7, po kanalu ukupno preko w, w tisuća ukupne snage, ali trafo je toliko velika, stvarno ne znam što je vlast standardni je to raditi, najviše izražen Japanski AV, ukupno od 6 eura bluffing, istina 8 100W razrađen cijeloj Europi. Korištenje AV pojačalo zna, veliki dinamički raspon, a često i čini noge mekan. Preporučena kupnju AV pojačalo, po mogućnosti više nego odaberite mid-range, inače slično piletine.

Kao opće slučaju, pojačalo snage veće je bolje. No, glavni utjecaj pojačalo snage koristi se za poticanje zvučnika, tako da ovu odluku u pojačala moraju biti usklađeni i zvučnike. No, pojačalo i zvučnik konfiguracije uključuje mnoge, kao što su pojačala izbor robnih marki, tipa moć cijevi i niske osjetljivosti, kao što je vrsta pojačala zvučnika je konfiguriran, teško je pronaći jedinstveni standard.

Važno je napomenuti da je entuzijasta općenito smatra da odabrana mora biti određen od strane govornika na pojačalo, ne bi trebalo biti "vlast rezerve" koncept za postavljanje pojačalo snage. Snaga pojačala i zvučnika konfiguracija određene kriterije treba: pod određenim uvjetima impedancije, snaga treba biti veći od zvučnika pojačalo snage, ali ne prevelike. Općenito vrijedi mjesta bez gubljenja snage pojačalo je iskrena, govornik o 1,2-1,5 vrijeme nazivne snage puta, u velikom dinamičnom prigodom trebao biti oko 1,5 posto.

(3) sučelje

Tradicionalni home kazalište bez vanjskog na prijenos signala kroz optičko vlakno, koaksijalni i analogni RCA sučelja, kao što su DTS, Dolby uveo niz kodiranja za optički i koaksijalni konektor za prijenos digitalno sažimanje na AV pojačalo dekodiranje. Kao nova generacija digitalnog sučelja, HDMI je naširoko koristi u različitim digitalne proizvode, i sa HDMI sučelje je započeo u audio i video proizvoda o primjeni i tehnologija sazrijeva, sve više i više snage pojačala su počeli koristiti ovu teoriju, nema gubitka prijenosa način.

No, HDMI i sama je tri verzije, prvi HDMI sučelje specifikacija HDMI 1 objavljeno u prosincu 2002, trenutno je najveći verzija HDMI 1.3 specifikacija je objavljen u lipnju ove godine. Glavni pozornost na jasnu liniju, njihove razlike i primjena je vrlo velika. Na primjer, Dolby Digital Plus, Dolby True HD i DTSHD ove tehnologije samo na prijenos preko HDMI sučelja 1,3, tako da treba obratiti pozornost na prilikom kupnje, samo pojačalo s ovim sučeljem kako bi mogli uživati sljedeće generacije glazbe.

HDMI audio signala ne zauzimaju dodatni kanala, umjesto korištenja i druge pomoćne informacije paketa, video prijenos signala putem 3 TMDS kanala zatamnjenja razdoblja, u obliku otoka prijenos podataka. Pruža najviše 8-kanalni, po kanalu uzorkovanja frekvencije 192 kHz signala visoke kvalitete zvuka, u odnosu na CD audio formatu 44.1Khz dva kanala signala, a najnoviji DVD-Audio i 96 kHz 6-kanalni audio format signala, a još manje.

4) kanal odvajanje

Odvajanje se odnosi na AV pojačalo surround dekoder signala audio kodirani signal natrag na kapacitet kanala i predstavljaju između svakog signala kanalno pojačalo "karanteni" razini. Vrijednosti su izražene u dB, dB veće vrijednosti, pokazuje njihovu razinu izolacije između većih, svaki kanal pojačala vratiti zvuk između "preslušavanja" na male, zvuči bolje. Odaberite AV pojačalo, veće razlike bolje nego općenito 60dB.

Razdvajanje će se pojaviti manje pojačalo zvučne slike lokalizaciju zvuka polju nije dopušteno za puni, zvuk i koherentan fenomen razlike. Visoki stupanj odvajanja kanala je preduvjet za osiguranje točne zvuk pozicioniranje. Visoki stupanj izolacije može napraviti zvučno polje je proširena, što je rezultiralo u širem smislu prostora, ali i napraviti zvuk više fino točno pozicioniranje, High Road, odvajanje glazbenih instrumenata, vokalne glazbe uvažavanje mjesto pozicioniranje, igra zvuka i filma okružuju učinke i tako dalje su ojačane. Ukratko, to je veći stupanj odvajanja neke mogu vam zvuk s učinkom polja na više ambiciozan i precizniji zvuk mjesto.

(5) omjer signala i šuma

Odnos signala i šuma iz šuma ili signala i šuma, jedinica je dB, odnosi se na korisne pojačalo signala izlaz s beskoristan šum. Trenutni pojačalo omjer signala i šuma pokazatelja je u potpunosti u stanju nositi se s Općim glazbeni program, tako da bismo trebali biti zabrinuti za kraj signala i šuma, može testirati glasnoću pojačala do maksimuma, da čujete buku veličina, od Naravno, manje to bolje.

Jedan pojačalo s visokim šum znači da pozadini tiho, s obzirom na nisku razinu buke, mnogi su bili maskirani bukom je slab ton detalja isplivati, plutajući zvuka povećava, jača osjećaj zraka, povećana dinamički raspon. Mjerenje omjer šum pojačala je dobro ili loše nema stroge identifikacijske podatke, općenito o iznad 85 dB je poželjna, ispod te vrijednosti moguće je u nekim situacijama glasno slušanje, čuti očito buke u glazbi provjere.

30.01.2012. u 02:15 • 0 Komentara • Print • #

petak, 30.12.2011.

HD snimanje uživanje Lexar puštanje nove video memorijske kartice

Globalni vodeći dobavljač proizvoda za pohranu LexarMedia (Lexar) najavio objavljivanje nove generacije pune HD video karticu za pohranu - kartice serije spremište za susret korisnika sve rastom video snimanja potražnje i profesionalni dizajn, ima SDHC i MSPD (memorije bar) dvije vrste Nikon Coolpix S80 Battery Charger specifikacije lako različitih kupaca odabir, pune su nadležni Video 1080 riješen od punog HD videa, i ima visoku brzinu prijenosa datoteka, neka korisnički uživaju video datoteka u prijenosu proces u učinkovite i prikladne. To je saznao da LexarSDHC full HD video pohranu kartice imaju 4G, 8G, a 16G tri vrste kapaciteta opcija, koje korespondiraju s 90.180, te 360 minuta video snimanja, a puni LexarMSPD HD video memorijsku karticu trenutno nudi dvije opcije kapaciteta i 4G .

Lexar puštanje novi video memorijske kartice

"Kako sve više i više potrošača razmišljati o video kao dio svog života, važno je da imaju pouzdane performanse i zgodan memorijsku karticu kako bi im pomogla osjećati ugodno snimati te trenutke." ManishaSharma, LexarMedia memorijsku karticu proizvoda, rekao je direktor "Samsung TL220 Battery charger je li to sport, ples, predstave na kampusu, bio je dijete je prvi korak, ljudi žele imati memorijsku karticu kako bi se zadovoljile njihove potrebe snimanja 1080 Full HD videozapisa razlučivosti. Lexar novi Full HD grafičku karticu čini ovu želju postaje stvarnost, u isto vrijeme također je donio ljudima očekivanja za pouzdanost. "

Postupno popularnosti HD kamere su rasle po Lexar memorijske kartice za korisnika serije snimanja treba osigurati više izbora, ljudi se mogu koristiti tijekom vremena više važan trenutak života, i velike JVC GZ-HD40 Battery Charger brzine prijenosa stope za kasnije prijenos ili razmjena nudi potencijal, kvaliteta Lexar je osigurati pratnju za podatke u kartice u svako doba.

ChrisChute, IDC globalni voditelj istraživanja misli digitalnih slikovnih rješenja grupe: sve manje i manje kamere koristeći ovaj ranije format snimanja, koji odgovaraju s njim je da sve više i više digitalni fotoaparati nude HD funkciju za snimanje videozapisa. Ovaj trend omogućuje korisnicima kartice za pohranu povećane potražnje s video snimanje mogućnosti, posebice rekord 1080 Panasonic CGA-S002E/1B Battery Charger rezolucija HD video kad ljudi kupuju HD kamere u isto vrijeme, oni htjeli za pohranu karata u ruci može ugostiti HD funkcijom video zapisa u punoj igru.

LexarSDHC i LexarMSPD full HD memorijske kartice nudi pet godina jamstva, i pisati štititi karticu kako bi pomogli korisnicima upravljanje i identificirati video datoteke.

30.12.2011. u 02:14 • 0 Komentara • Print • #

utorak, 29.11.2011.

Application and prospect of intelligent cabling management system introduced

What is the background of the birth of the intelligent cabling system? Now what stage of development? How big is space? Users concerned about intelligent cabling system, which is necessary to introduce.

"Intelligent cabling system began to appear in the last century 80 's medium-term, mainly due to the network administrator to manually record routing link information was very difficult, and they also hope the wiring system for real-time monitoring. Wiring system in the increased use of process because the user wiring changes, moves which have jumped, recorded by hand wiring system information are often numerous errors, resulting in a number of management problems. In this context, have jumped on the distribution frame in real time management of the intelligent cabling system came into being. "Asia Pacific Marketing Manager Simon Shen Linong describes the birth of JVC GR-DV808 Battery Charger the intelligent cabling system.

Obviously, intelligent cabling system is to replace the inconvenience of manual management and ease of an error, at the same time facilitate the jumper changed was born. In fact, it was born earlier, but real development in recent years, and began accepting more recently by the user. Molex cabling network Department Manager of greater China business ye chunhui mentioned that "wiring systems through the use of computer-generated work orders in real time to simplify moving, increases and changes (MAC). Through a network connection or communication between intelligent cabling system in the network ports supported, can be in different places to monitor the progress of these worksheets. Network administrators can determine the move, add and change the order, as it relates to the physical layout of active and passive devices are closely related. Technicians can get real-time feedback, pinpoint how patch works performance, verify that all connections are correct, for proper functionality. ”

Visible, to solve problems in the application so that the intelligent cabling system step by step, development all the way down, with great development potential. As the Shen Linong by told of as, intelligent wiring system of development after has is as follows several stage: first is only for distribution line frame of management system, to convenient jump received and the document records; second is on entire wiring chain road for management, at this time of management software can on each a chain road, from network device port and the work area port for management; currently has on network assets for management of intelligent wiring system has available, the system can will and wiring system connected of network device and the work area terminal equipment are into its management range. Direction of future development will be fully improved asset management capabilities to enable intelligent cabling system can be an important part of the entire network asset management.

Unique proprietary value different from the network management software

Intelligent cabling system can bring value to the user? Network management software do you need it?

Intelligent cabling system is a structured document routing and management system of the latest developments, its value is unique. For traditional wiring management there are written records, such as a spreadsheet or database management software, a major drawback of these methods is to manage a heavy workload of the personnel, all of the data updates do require a management manual. In many cases, because network administrators fail to update the data in a timely manner, leading to manage data in a database failure, managers need to spend a lot of time and effort to update records, to work difficult. But these methods do not check network connection status in real time. Similarly, while the simple network management protocol (SNMP) to view network traffic in real time, but only through intelligent cabling system (because this is a physical layer management), the network administrator to fully view full physical interconnections within the communication between, and are readily available. In other words, because of the distribution system in the bottom of the information system (physical layer), and Panasonic DE-A39, DE-A39A, DE-A39B, DE-A40, DE-A40A, DE-A40B Battery Charger wiring devices do not have the function of intelligent communications, so the traditional network management software is unable to directly manage this level of equipment, which is the intelligent cabling system is the difference between the network management software, as well as its value.

"Timely, automated physical layer management is a rapidly growing market. User awareness of the demand for integrated network management solutions are being strengthened, through intelligent cabling system to ease the pressure of managing ever-changing network, and can reduce network downtime to a minimum. For network administrators, this means more networking time, and less wiring problems. Using network management and application integration as well as physical layer management capabilities on the SNMP platform, provides network administrators with a wider management vision to the entire network and control. "Kang-Pu China Technical Director Xu Xianghong introduce intelligent cabling system to the value of the user.

Indeed, as enterprise routing facilities more and more complex, wiring systems management is becoming laborious and time consuming, intelligent cabling system can reduce disruption, realize intelligent maintenance, avoiding manual documentation work so that network administrators from the lengthy, and prone to human error in the work of get over it, greatly reduce the management costs of the information technology infrastructure. This is the maximum value from your intelligent cabling system.

Ye chunhui intelligent cabling system was also referred to it from another angle, "added value", both real and quite interesting. "Being able to integrate camera, so users don't have to worry about someone dares to increased illegal moves, and changes. By adding optional alarm event recognition feature, you can do very much needs. Systems can also be sent by E-mail with any illegal changes for more information. And real-time distribution system can help security, it can take between communication and are stealing photos of people in the workspace. ”

Composition of carrot growing richer

Intelligent cabling system is a software or hardware? What makes up? Features do enough?

While there are big differences between intelligent cabling system manufacturers, but consists of two major hardware and software parts are common features, hardware monitor wiring connection in between, the software is recorded documentation of all devices across the network.

"To implementation on is physical layer of wiring system of intelligent management, must has a mechanism can implementation on physical layer connection situation for real-time detection, each manufacturers in implementation data detection Shi using different of method, but its fundamentals is is simple, are is using has circuit switch of principle, in wiring chain road connected Shi connected detection switch, in wiring chain road disconnect Shi cut off detection switch, intelligent wiring system through on switch state of detection to determines port connection of State. "Tyco Electronics AMP wiring systems product marketing manager Cai Li straightforward introduction of the principle of intelligent cabling system.

In General, hardware parts, wiring racks by the parser, jumper, connection cables, wiring rack-side taste and so on; software was mainly a proprietary software package. Tight integration with hardware and software, and work together to implement intelligent management for wiring system.

Intelligent cabling system to Tyco Electronics AMP below as an example to explain. The system is still based on traditional AMP Netconnect 110 modular wiring system.

Users may use any manufacturers of networking products, except that the system on the distribution frame each RJ-45 ports added a metal sensor pads (sensor pad), jumper external increases metal pins, this metallic contact with the induction of this 110 distribution frame mats, 110 distribution frame via I/O cable with a network Analyzer (Analyzer) is connected to. ITRACS software and network analyzers, dynamic monitoring in real time between the distribution frame, the network connection between the device and distribution frame State. AMPTRAC hardware and iTRACS software system of combination make up for the has past integrated network management system in the missing of physical layer links, is network control and Nikon D60 Battery Charger archive management of revolutionary method, this unified of Foundation facilities management system can in Telecom or data center in automatically generated network system full of physical topology structure figure, through real-time of physical layer automatically management, provides a copies real-time, and full of network fault diagnosis and disaster recovery document information, does not continuous to real-time records network wiring system of increased, and Move and delete.

I should note is that not all intelligent cabling system with external sensors or "metallic", an example is the SYSTIMAX iPatch System, and can accept the standard RJ-45 and RJ-11 patch.

Wiring system for intelligent management mainly involves the recording and updating of information, error identification, configuration changes and features such as error alerts. Specific speaking, automatically detects and found wiring port, and automatically detects port Zhijian of connection, and understanding port of State, and records jumper of connection event, and real-time management distal of wiring system, and understanding jumper of connection is by authorized, and on triggered event made reaction, and control work completed of order, and understanding and wiring system connection of network device port, and records all jumper of changed and formed log file and can and network management system for mutual operation, became has intelligent wiring system most main of function.

Users choose to avoid blind have method

What kind of user friendly intelligent cabling system? Small and medium-sized users whether it is necessary for intelligent wiring systems? When users select intelligent cabling system needs to pay attention to what issues?

Good management of several small companies, large companies are often managed on has become the biggest problem. Cabling system is the same, only the baibashige node routing system using intelligent cabling system is obviously a bit overkill. In General, the intelligent cabling system has approximately 500 above the level of connection of the network. If the number of connections falls below 500, then you would typically use the traditional method is simple to manage. "Node number, often after several artificial jumpers, easy to forget that changes to the database, for putting IT into production machines as the financial industry's most intelligent cabling system should be adopted. "Tyco Electronics AMP wiring systems Division regional business Director Neville Lai said.

"At present, the intelligent cabling system has been the user's attention, we are talking about a few large projects, there will soon be results. In fact, intelligent cabling system already has many precedents in other countries, such as in India, there are a large number of applications, application in China's relatively small, but in 2005 was the beginning of many users to apply Intelligent cabling system. "Neville Lai so application of the intelligent cabling system.

In fact, more understanding of the users on the wiring itself, select the greater the likelihood of intelligent cabling system. As CITIC Guoan mentioned earlier in the article of the Cyberport project, the project owner of CITIC Beijing Guoan Electric Corporation itself is a very large wiring systems integrator, has done a very large number of large projects, their understanding of wiring than regular users, and it is this experience and make himself first uses intelligent cabling system.

User was clearly intelligent cabling system ideal for buyers, but things are not absolute, value data may be made on any size network wiring system for intelligent management of value for money ye chunhui give us such an example to illustrate this principle. The financial sector is rather special, as in the trading room, any network outages would bring a very big loss. Look at some of the benefits of the intelligent cabling system, can be seen in many cases, you can effectively use this system because it can reduce system outages due to wiring changes. Therefore, the maximum is the determinant of end user awareness of the value of the data or system outage losses due to the lack of data.

Shen Linong also expressed a similar view, "large users for more than 1000 projects, larger projects, its management is more difficult to do, the more you need intelligent cabling system, small and medium-sized users in key sectors, critical regional needs. ”

Then, for users who wish to adopt intelligent cabling system, should pay attention to what issues?

One of the most important factor is up to standard. Standard connectors can be approved by the Commission based on testing standards for convenience. Note that some "system" seems more like a collection of spare parts, it is used in the communication between a manufacturer of connectors, and using another manufacturer of connectors in the workspace. In the event of problems, where is the cut-off point? Common sense tells us that ought to select the system from one manufacturer. Of course, also need to include the software in the system, and system manufacturers to be able to support the entire product collections, instead of just the traditional connection.

In addition to the standard in addition to MAC user itself more or less, intelligent cabling system with real-time capability, whether a jump, docking are suitable, the availability of quality assurance and training, is also the user objects you want to visit.

"Some intelligent cabling system can integrate with network management software, such as HP OpenView, and supports a variety of network types, can also be applied to existing systems, it is critical, because it can ensure the view the connection status of the entire corporate network, can indirectly reduce the investment return period. "Cai Li gave users a reminder from another angle. Indeed, when users select intelligent cabling system, consider how to integrate network management software is very important, so that the network system management in a more unified, plays out, the greater the value.

Install complex

Cabling system installation problem is users care about, but what about intelligent cabling system installed? In fact, the physical installation of the intelligent cabling system no better than standard complex structured cabling system. It is typically installed only certain electronic devices, the process is not a hassle, users simply put these electronic devices in a rack, and then even to the level from its distribution frame sensor cables and hubs can be a port on the sensor. Real skills intelligent cabling system installed is configured. These systems rely on a database to provide connection information, if set incorrectly, the information may be incorrect or misleading. Some database up and running significantly easier, but they require a lot of configuration. Compared with conventional wiring, intelligent cabling system gave different quality requirements on Installer. This should also be the user visit Integrator (Installer), an important factor.

Compiling and editing: put about?

Selection of new technologies, new products, always takes some time to make a decision, at this stage, have put about feeling. Intelligent cabling system, too, what it can bring to users? Return on investment are satisfactory? Is easy to use? The question in time the user no clue. Journalists believe that the following two questions to figured out, decisions, and will have.

On one hand, to pay an extra value is worth the cost of 50%~100% (need to be explain here, intelligent cabling costs of wiring systems in different areas have different proportions of Canon CB-2LX Battery Charger overall costs because of low prices of copper, so the proportion of high, in the United States the figure should be around 20%).

In General, users such as the intelligent cabling system selection, cost need to pay an extra 50%~100%. How to determine the value or worth of this part of the costs spent? It should be said that there is no standard answer, it depends on the user's specific circumstances. Mainly depends on the user moves in the future, increase and changes in the wiring systems (MAC) more or less, if you do not need to change, that value cannot play intelligent cabling system. The point is, who knows in the future, especially for the needs transport

29.11.2011. u 02:45 • 0 Komentara • Print • #

srijeda, 26.10.2011.

Panasonic released several new digital cameras

First of all, let us take a look at Panasonic DVD camcorder. As one of the active proponent of DVD digital camcorder, Panasonic showed at this exhibition two DVD digital camcorder--VDR-M50 and VDR-M70, compared with predecessor models--VDR-M30 and VDR-M10, these two machines look more compact, andPanasonic Lumix DMC-TS2 Battery Charger features are more superior. It can use the DVD-R/RW and DVD-RAM discs, only Panasonic and Hitachi DVD digital cameras can support both of these types of discs, DVD and Sony digital cameras only support DVD-R/RW disc, DVD disks as storage media can provide the highest quality digital images, large storage capacity up to 120 minutes of video recording and 1998--still image, rewritable DVD disc can be erased, 100,000 times And on the quality of video shows no damage!

VDR-M50

VDR-M70
VDR-M50 using has one-sixth inches, and 680,000 pixel of CCD image induction device, may shooting pixel for 640x480 of static like, has Superman of 18 times times optical zoom, focal length for f/1.8-2.8, shooting far away of scenery effect more superior; and VDR-M70 using has one-fourth inches, and 1.02 million pixel of CCD image induction device, may shooting pixel for 1280x960 of static like, has mainstream of 10 times times optical zoom, focal length for f/ 1.8-2.4; the two machines are SD/MMC cards can be used as a storage medium, with USB2.0 interface, minimum illumination is up to 12LUX.

DVD digital camera has powerful of linear and nonlinear edit function, to you provides most usually in computer Shang with software to implementation of Nikon EN-EL9E Battery Charger function, can let you in does not required through using PC of situation Xia, on can directly in LCD monitor Shang on by shooting of image for instant edit, due to using has CD as storage media, is no longer need originally used to placed MiniDV with as large of space, so body looks compact thin has many, more for tourism Shi carry!

Panasonic also has released 5 single-CCD digital video camera, they are--PV-GS9, PV-GS12, PV-GS14, and PV-GS15 and PV-GS55. Attention is, Panasonic, 5 4 digital camera models are applied a large multiple of the optical zoom lens, only PV-GS55 still used 10 times optical zoom lens of the Panasonic company has always been, let us simply take a look at those paragraphs of the following performance parameters of digital camera.

PV-GS9 uses a one-sixth-inch 680,000-pixel CCD image sensor, with 20 times optical zoom, the expected retail price of just US $ 350, approximately 3,000 Yuan or so, very attractive!

PV-GS12 uses a one-sixth-inch 680,000-pixel CCD image sensor, with 20 times optical zoom, you can Panasonic PV-DAC13, PV-DAC14, PV-DAC14D, VSK0651B Battery Charger use the SD card storage static pictures, with USB interface, the expected retail price of just US $ 399, or roughly around 3,300 yuan;

PV-GS14 uses a one-sixth-inch 680,000-pixel CCD image sensor, with 22 times optical zoom, built-in LED the assistance photograph light;

PV-GS14 uses a one-sixth-inch 680,000-pixel CCD image sensor, with 24 times optical zoom;

PV-GS55 is the upgraded version of GS50, adds MPEG4 movie recording capabilities, are about other features, but the price was cheaper by nearly US $ 100, expected retail price of just US $ 699, about 5,800 Yuan or so, huh, it seems that domestic GS50 really is not expensive:)

Show at the 2004CES exhibition of these two DVD digital cameras of the retail price and JVC GZ-MG750U Battery Charger launch date have yet announced last, Matsushita said, on this specific price, launch date and performance parameters of the machine would be formally announced in the near future, let us wait and see.

26.10.2011. u 04:04 • 0 Komentara • Print • #

četvrtak, 29.09.2011.

Flash small Part 4-talking about the Wikipedia TTL

TTL on the historical development in two phases, one is concealed TTL metering and the camera with TTL functions of Flash. It is interesting, following almost more than 15 years after the publication of by camera TTL, TTL Flash occurred. TTL appears, giving users maximum convenience than in hasty situations, even if Panasonic DMW-BCG10 Battery Charger shot, too late to estimate distance, adjusting the aperture, Flash is not too large deviations, news photography, work a lot easier.

External metering inner light
TTL full name is Through The Lens, meaning "through the lens". Not until the TTL, the camera metering Cds outside of the main fuselage (Cadmium-Sulfide cadmium sulphide photoconductive cell), under the influence of ambient light do not reflect the light passes through the multilayer lens or add filters appear light loss will lead to underexposed. While TTL metering components are located inside the fuselage, about the lens closer to film location. As is measured by light lens, outside so TTL record than light better.

Should say TTL camera history, in fact, claiming that the world's first camera using TTL metering system there is also controversy. Because in the 60 's, several camera companies include Topcon, Nikon and Pentax has introduced cameras with TTL Nikon Coolpix S7 Battery Charger metering, Pentax the concept first proposed in 1960, but wait until 1964 Spotmatic was formally launched in mass production, instead of Topcon was launched in 1963 to market, to lose.

1963 first put on the market of TTL metering camera Topcon RE Super

1964 introduction of the Pentax Spotmatic
Pentax to launch in 1971 Pentax ES to the effect that the electronic shutter, is the world's first controlled by the TTL system linked single mirror camera shutter speed. Due to the use of electronic control and become non-stage shutter, breaking the original mechanical shutter the default limit, such as a rate of 1/53 or one-one thousand three hundredth can reach, exposure accuracy improved, but then Pentax and no further development of this concept have a TTL flash. About 7 years later, in 1978, Olympus launched the world's first ball first TTL Flash TTL Flash T32,TTL metering and Flash the system only has.

1971 introduction of the Pentax ES
Automatic metering to TTL metering
Most of the early Flash cannot change output, each time the Flash are all output. Distances between subject and camera changes if requires adjusting the aperture to control Flash receive to get suitable exposure. Along came equipped with an external automatic flash metering of the original, according to the main optical level to control Flash output. As for the Flash method of controlling the amount of JVC GZ-MG50 Battery Charger light, is to rein in Flash or off time. Flash occurs only in one-one thousandth to 1/10,000 of a second between when the shutter opens, also make Flash output. When metering components when that object reflecting the amount of light enough, there will be terminated at the time of exposure, the shutter remains open in the Middle the Flash output. Exposure of the subject you rely on Flash to do so, as for the background exposure of the environment, is driven by the shutter open time to decide.

However auto flashes are repeated outside the camera metering problem, if lens fitted filter, will affect Flash output accuracy. TTL Flash appeared, because they can be obtained from the lens metering data such as aperture and subject brightness, you can give the necessary amount of light, more precise control of Flash, save to evaluate past trouble with Aperture and distance. Modern Flash Zoom can be done even more to help adjust exposure range, making power more effective utilization without waste.

Flash with external metering components, after installing the filters will have to manually increase the output.

TTL flash metering is located in the fuselage, even with the filters, use jumping lamp or even abandon Flash are also subject to accurate output.

But it should note, same with automatic metering, exposure and TTL Flash primarily for one normal exposure, can still through the Flash output compensation when necessary (Flash Compensatoin) changes, generally Flash has a one-third EV adjustment. TTL best reference pointer as a normal exposure, if necessary, and then make changes and not monolithic.

The other hand, when we set the camera in auto exposure mode (such as p or Auto), the camera often aperture and shutter will be fixed at a value. If we wish to depth of field, expression of the subject and background brightness better control, be sure to use manual exposure mode.

29.09.2011. u 03:55 • 0 Komentara • Print • #

četvrtak, 09.06.2011.

Write purchase DC around us before buying mistakes

Into the summer, consumers on the digital camera buying enthusiasm also increased as the temperature rises. Price cuts, promotions, gifts, and so a wide variety of marketing tools are often head back to buy digital camera consumers huyou of under the table and overwhelming. So many consumers just between the Chinese and a camera, thus fog bought back. Not doing his lessons in advance, guarantee and Nikon EN-EL2 Camera Battery after-sales not implemented, results had their own heavy losses.

Here we come zhuadianxing, look at when buying a digital camera which need special attention.

First, do not understand their needs, blind purchase.

Consumers tend to be impulsive people in this category, see the frequent appearance of brands in advertising and digital camera, or hear about a certain camera is a very good choice. Do not consider their own needs and actual usage, credit cards, buy back. So back to the home, thick brochures look twice and still didn't know how to operate; p shooting for half a year or only; see how good where good people the camera, his own for a long time lengshi don't think where and two-thirds features basic idle.

Rich A620 price falling of manual exposure functions, but are not suitable for all consumers.

If you are afraid of becoming one of the above, then the purchase be sure to ask before buying a digital camera around the friends, to take learning from him, or Internet-related information, bridge the knowledge gap myself. Give their money and use a little planning. For example, how much money, how are ready to purchase the camera. Avoid in the case of nothing prepared hastily rushed to the market, otherwise you will only be in the eyes of businessmen "onion head".

Below will give you a little tips, are ready to purchase cameras put these questions to answer, and then to buy, will let you target more Oh!

1. are you fit to what type of digital camera? (Small, sleek type card? Fashion the other types? Low prices-home? Telephoto type entry? It is quite professional SLR digital camera? )
2. prepare for even parts with the fuselage a total of how much does it cost? (Includes: battery, memory card, camera bags, tripods, and so on)
3. main will usually do something with this digital camera? (Tourism, family monument, artistic creation or print output)

If you had answers to these questions, then you must be more confident when buying.

Second, the distributors recommend not necessarily good, not bad is not recommended.

Walk into a shop inside salesperson give you a home away from home the smile, and ask your needs, to Panasonic CGA-S008A Battery Charger recommend to you many of the now popular, best-selling digital camera. At this very moment, must have their own, for example, what their favorite brands, like what type of digital camera. Even had not done its homework, now on the streets, television advertising about digital camera a lot, after you see, there should be an own goal.

Many dealers in order to free some of the backlog inventory models, so to purchase the target uncertainty consumers the opportunity to sell cameras in this category. For example, a consumer wants to buy Canon IXUS 800 IS, possibly due to more selling this digital camera, appears out of stock. And distributors much-decried the camera's features and picture quality, and so on, the opportunity to recommend a sell to him does not fire, but the price lower than the IXUS 800 IS digital camera, blame the high cost, and higher than the IXUS 800 IS in a certain way. Dealer's come up with an empty your inventory of products, and consumers under unknown circumstances, into the set.

For complete brand system is necessary.

Is in fact very many dealers are joint sales, this shop and the shop can be adjusted between the goods. If the shop said no, and you see in other shops, on the one hand you can go to another shop to buy the other hand, if this shop there is a price advantage, you can help her transfer goods, so be sure not to be hoodwinked by dealers.

Third, the goods carefully, preferably with experience of peers

Prices settled, paid the money, natural to inspection on the spot. While not crowsare black everywhere, but not every dealer are good people.

First is, of course, looking at the camera a seal on the packaging is intact. Many camera packaging are one-time seal today, along with 800 free Tel, you can query for the domestic mainstream on the spot, at the same time pay attention to packaging, manuals, warranty cards is simplified Chinese, packaging parts are complete.

Although the problem of parallel imports licensed importers, controversy from the start to the present, but personal advice or purchase domestic warranty licensed importers. After-sales guarantees on the one hand, on the other hand, although occasional events, but today digital camera quality problem frequency, what if a recall or free maintenance, parallel imports often do not enjoy these services, beating teeth and throat into the stomach at that time, your tears but no one has come to see you clean.

Second, if you want to verify that the camera is brand new, open packaging for the first time, to pay attention to detail in several places.

1. whether leave fingerprints on the lens, LCD screen. If it is not entirely new, these places often exposed bag.
2. lithium battery has been used contact mark. Now that most digital cameras use lithium-ion batteries, JVC GR-FXM40 Battery Charger new lithium battery electric shock-resistant Staphylococcus aureus, no noise. Used lithium cells and battery cartridge contact will contact marks. It is well read.

Finally, that is to determine the price of accessories you need. This is also the need to achieve to do homework, can do on a number of quotations site queries about prices, ask a few more dealer prices. Often many dealers, on the camera give you a very low price, attract you to buy, but because the parts are often overlooked, is not p-speed storage card acts as a high speed memory cards sold, is the price, so you save money on the camera are investments on the parts, think also got cheap.

IV, gifts to check well, beware of replace the beams with rotten timbers

Many dealers also like to use gift to make. If manufacturers launched some of the promotions, gifts are the same to the dealer, so each dealer obtain the same gift. Individual dealers with consumers not familiar with gift opportunities, gift away, sold as accessory or gift exchange, in order to reduce costs. Consumers buying digital cameras have to know about before, manufacturers are being engaged in some national promotions, gifts and what. Not because their negligence was drilled by individual dealers empty.

Issues that it should be noted that said so much to buy, some consumers have asked, so how can I choose the one that meets their needs, and inexpensive digital camera? Of course, listen to the dealer does not have any satisfactory answer. These answers or want to go exploring on our own. There are some misunderstandings in purchase, mainly from advertising, marketing and public opinion caused by consumers blindly.

Here, we'll do a summary, it's good to point a beacon is about to buy a digital camera consumers, less some detours.

1. the excessive pixels will become a heavier burden on storage card never think that higher the higher the pixel. Perhaps in an era of 3 million, 4 million pixel digital camera hold sway, more pixels high, guaranteed to print more photos of the big picture. But in an era of mainstream now 6 million pixels, excessive pixels enough to become a serious burden on the memory card.

In General, 6 million pixels can already meet the normal 10 inch photos of the following print requirements. 8 million pixels you can meet the A4 paper size photo printing, but use the ordinary consumer-level digital camera user for 10-inch photo printing needs are very small. Therefore, for general consumers, enough to meet the requirements of daily print 6 million pixels, no need for excessive pursuit of high pixel.

Excessive pursuit of high pixel storage card capacity is bound to increase, 512MB for 8 million pixel digital camera storage cards can only be shot around 150. And 10 million pixel digital camera can only take around 100. If you travel, a mad racket, immediately faced the predicament out of storage space. So for users who frequently travel, more than 8 million pixel digital camera recommendations carry over 1GB of storage card out, if you have digital partners is more ideal.

Although memory card price getting lower and lower, but not money, is not something can get, so higher pixel increase the burden on storage cards, will directly reflect on the loss of money.

2. the big screen was a popular resolution is also important

Remember the original digital camera displays just a little bit, 1.5 inches. Look also feel very clear, is a small point. So the Prophet's designers started their big-screen love flourish. From 2 inch to 2.5 inch display with desires, which developed into a 3-inch or 3.5-inch big-screen.

But value the area at the same time, also it cannot be ignored. That is the resolution. If the display is large, and could not keep up with the resolution, the direct result of clarity is not enough, a strong sense of particles on the screen. Owing to lack of looks delicate, sometimes screens will appear in the dark "Snowflake". Sony digital cameras are always higher resolution of the display, stylish digital cameras with a 2.5-inch display, resolution generally at around 230,000 pixels, it will be in the industry to enjoy a good reputation. Fuji F10, F11, F30 and a series of digital cameras since the introduction of a new "great screen", also reached a new level of high resolution, are more affected by consumers.

3. whistles selected less wise

Now fancy digital camera functions, digital camera can hear songs not surprising things, but it can play games absolutely enough news. Fuji V10 built in 4 games, also equipped with a 3-inch LCD screen, but when you using 4 small buttons can only be controlled by nails to make games, I'm afraid you do not have the nature of the game. Finally, such a selling point became a white elephant, in fact is a fresh of the moment.

4. high ISO noise

Higher ISO can anti-shake, increase shutter speed, which is known as the reason. But high ISO direct concerns is much noise. Although more and more advanced high technology known as effective in controlling noise, ISO1600 and Canon LC-E6 Battery Charger ISO3200 case, even the noise of the SLR is not well controlled, let alone ordinary digital cameras so small CCD, said not much noise can only be compared relative to previous similar cameras.

For the pursuit of fashion that is a good thing, but if you had high hopes for many fashion function, that is, your wrong. In fact, after all, or some of the most original feature of the most commonly used, such as program shift, Aperture priority shift, there are three scenes of landscape, portrait, night scene mode. As long as they can meet their own needs, is most appropriate for your digital camera. No need for excessive pursuit of fashion, pursuing the trend. After all the money in their pockets, himself is wresting man Oh

09.06.2011. u 04:20 • 0 Komentara • Print • #

utorak, 24.05.2011.

Single + long life! Toshiba Satellite R800 evaluation

R series most new business
Scolded baidu loaded May 18 laptop notebook channel originated from the business, as one has a long history the most notebook manufacturers Toshiba, full of design in business notebook details. Today we introduce you a mainstream business notebook of Toshiba's latest Satellite new R800.

Toshiba r series notebooks has always been synonymous with high-end business, from extreme slim Portege R500 series last year, Chief Executive of the major Portege R700 series, is a portable business leader in this product. This new R800 series takes a Satellite series, DC Power Jack for Toshiba Tecra 8000 combined with the product positioning, this time the R800 notebook r series high above the lower value, leading 14-inch mainstream business market.
Satellite R800 (quote parameter picture comments)
Processor Intel Core i5 2310M
Memory 2.000GB DDR3-1333
Hard drive size 320GB
Optical drive type DVD burner
Screen size: 13.3 inch 1366x768 LED
Video card model AMD Radeon HD 6470M (512MB)
Integrated Intel HD Graphics 3,000
Wi-Fi 802.11b/g/n (300Mbps)
Bluetooth support
Data interface 1 USB3.0, 2 x USB2.0
Camera built-in 300,000 cameras
About 6 hours battery life, depending on the environment at a specific time may be
Body material magnesium aluminum alloy
At 1.72 kg
Genuine Windows7 home preinstalled operating system Standard Edition
Judging from the hardware configuration, the Toshiba Satellite of the R800 uses a 14-inch mainstream design, matching the latest Intel Sandy Bridge platform. Core i3-2310M duo, 2GB memory and AMDHD6450M discrete video configuration, as a business notebook, performance is justified.
Design: R700 style extend built-in USB3.0
Appearance: material and colors
Although judging from the product positioning, this Toshiba R800 before looks like the R700 "thick" and "simplified" version, from the appearance of point of view is not too much change. However, judging from the actual experience of the real, the R800 is the result of more sophisticated new design.

Stripe design the fuselage of a surface
Toshiba R800 machine body adopts the design of plastic material, but streaks of dark gray metal tonal feeling and Yes design, or let this notebook reflects a certain business model.

Palmrest with a surface using the same grid design
Relative R700 alloy material frame, Toshiba R800 are some differences in terms of body thickness and material. Normally fuselage of the plastic material easy to people-end, start feeling, Toshiba R800 stripe design, let this notebook also has a good feel. And dark gray metallic color or let the entire notebook pretty textures.

Interface layout
Judging from the right side of the fuselage, screen rotation designing R700 exactly, this style was retained down. Right side of the fuselage interface relatively simple design, users near the end of the optical drive for day-to-day use Basic does not have any effect, multi in one card reader, network card, interface, laptop locking holes distal and USB3.0 interfaces are being designed in the fuselage.

Both sides of the fuselage about interface layout
As to DC Power Jack for Toshiba Tecra 8100 the left is the layout more comprehensive functional interface, including HDMI, features such as eSATA/USB have been very good to keep down. As a business would have been said, the design is still very good.

To control the total thickness, front and back side do not layout any interface
Cooling way

Toshiba R700 as a standard voltage of ultra thin notebook, the heat had done a Kung Fu, and R800 although body thickness increases, but also to the heat sink is learned in praise of the R700 turbine cooling system.
Weighing test

Toshiba R800 bare (left) and travel weight test
As a 14-inch notebook, 2.03 kg in weight at the same size of the notebook is very lightweight, coupled with the power does not exceed 2.5 kg, maintained a good portability.
This chapter summary: Toshiba R800 on both the weight and heat dissipation retains the fine tradition of the ancestors of the Portege R700, and 14-inch larger widescreen displays, but also for HD viewing window that provides more good users friends. In addition, USB3.0 built-in machine of high speed transmission interface with more good business performance.

24.05.2011. u 05:39 • 0 Komentara • Print • #

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