Gubitak u signalu kod DVI kablova itekako postoji.
Sto je duzi kabl dolazi do gubitaka u signalu.
Takodje, nije tacna konstatacija da su svi DVI kablovi isti odnosno da ce biti ista slika kod svih kablova po principu ili imas sliku ili nemas.
To je jedna velika ZABLUDA koja postoji kod mnogih korisnika.
Losiji (jeftiniji) kablovi ne isporucuju sliku istog kvaliteta kao i oni skuplji kvalitetniji.
Razlika je drugacijeg tipa od razlike kada se koriste vga kablovi.
Kada se koristi nekvalitetan DVI kabl na ekranu se cesto javljaju razne smetnje, dolazi do treperenja piksela, pojave raznih artefekta i nestabilne slike.
Mnogi korisnici misle da su te smetnje zbog nekvalitetnog monitora, ali u vecini slucajeva do tih problema dolazi zbog nekvalitetnih kablova.
Osim toga los DVI kabl se moze veoma lako ostetiti, malo jaceg presavijanja isl. i eto problema na ekranu.
Dual link kablovi donose osim vece propusne moci, vecu brzinu i kvalitet signala. Tacno je da ce vecini korisnika single link kablovi “zavrsiti posao”, ali ukoliko je mala razlika u ceni preporucio bih ti da uzmes dual link jer su to kablovi koji su mnogo kvalitetnije napravljeni u odnosu na single link. Da bi se postigle Dual link specifikacije moraju se koristiti kvalitetnije komponente za izradu.
Kada na nekom stranom forumu procitas da nema neke velike razlike izmedju DVI kablova, znaj da se to poredjenje odnosi na kablove od npr. 20e u odnosu na kablove od preko 100e. U oba slucaja misli se na neke firmirane kablove.
Medjutim na nasem trzistu su zastupljeni razni kineski NO-NAME kablovi, koji stizu kontejnerima najcesce bez pakovanja u obicnim kesicama i prodaju se za oko 5-10e.
Probaj da nadjes nesto kvalitetnije mislim da za oko 2000dinara se moze naci kabl pristojnog kvaliteta. Ko koristi kvalitetnije monitore, dati 20e za dobar kabal se itekako isplati. Ko koristi neki TN monitor od 70e-80e sigurno nece dati toliki novac za kabl.
Izvor informacija:
http://www.datapro.net/techinfo/dvi_info.html
http://en.wikipedia.org/wiki/Digital_Visual_Interface
Ko ne zna engleski tu je google prevodilac:
http://translate.google.com/translate?sl=en&tl=sr&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.datapro.net%2Ftechinfo%2Fdvi_info.html
http://translate.google.com/translate?sl=en&tl=sr&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDigital_Visual_Interface
Citati:
There is a common misconception regarding digital video cables, which is the belief that an "all digital" signal is an either-or result: either the cable works, or it doesn't. In reality, while there is no signal degredation in digital video like there is with analog, cable quality and length can make a difference in your picture.
When a DVI run is unstable, you may see artifacts and "sparkling" pixels on your display; further degredation tends to flicker out or shake, and the ultimate sign of loss is a blank display. In-house tests on varying equipment have produced strong signals up to 9 and 10 meters long. Tests at 12 meters generally resulted in signal noise and an unusuable image on the display, and anything longer rendered no image at all.
Keep in mind that when using DVI-I cables at extensive lengths, you may not be seeing a digitally-clear image on your screen. Because analog has a much longer run, your display may auto-switch once the digital signal is too weak. For this reason, long runs are best done with VGA (for analog) or HDMI (for digital). If you have no option other than DVI, make sure you're getting the best image by using DVI-D cables and verifing that your display is set to digital input.
The dual link DVI pins effectively double the power of transmission and provide an increase of speed and signal quality;
The maximum length of DVI cables is not included in the specification since it is dependent on the pixel clock frequency, and hence the video mode's bandwidth requirements (which is a function of resolution and refresh rate). In general, cable lengths up to 4.5 m (15 ft) will work for displays at resolutions of 1,920 × 1,200. This resolution will work even up to 10 m (33 ft) if appropriate cable is used. Cable lengths up to 15 m (50 ft) can be used with displays at resolutions up to 1,280 × 1,024. For longer distances, the use of a DVI booster is recommended to mitigate signal degradation. DVI boosters may use an external power supply.
I na kraju smesno ali istinito :