ATI Radeon 7500 S-video out problem

[lilos]

ta zna4i imam tuka edin r7500 s S-video out i nemoga da go nakaram

da ba4ka kato horata. parvo mi dava obraza leko izkriven i svit

a na vsi4ko otgore e i 4erno bql. kabela koito izpolzvam e S-video

do evro skart buksa i otdelno ima dva audio kabela L&R za zvukovata

karta. Kak moje da se opravi tova ?? dali ne izpolzvam pravilnia

kabel? Oba4e zabelqzvam 4e kato restartiram kompa o6te v na4aloto na zarejdaneto pak e 4erno bqlo-tova me navejda na misalta 4e problema e v kabela 6toto ne sa se zaredili nikakvi draiveri a s-videoto raboti.



P.S ta kartata e s tri izhoda s-video dvi i obiknoveniq

[Suren]

S-Video към еврожак не може да се направи освен ако от самото S-video не е просто преходник до нормален чинч, където ми се струва че е и проблема. Пробвай ако намериш да свържеш S-video kъм S-video на телевизора и тогава ако не е цветно значи е в картата проблема. Иначе трябва да смениш преходника (или да си направиш ти ).

[BobyTT]

http://www.setcom.bg/news/forum/topic.asp?TOPIC_ID=3232





Razgledai go vnimatelno... vij PAL NTSC... vzemi si nov cabel ot Germanos za 5.69lv , tochno dneska na edno priatelche imashe podoben problem i tova cabelche mu pomogna...

[Julian]

Ами за черно бялото не си избрал правилната система. Пробвай с PAL-B. Не се чуди че в началото на зареждането работи без дривер. Картите на nVidia могат да се пуснат в дос без драйвер.



http://julmin.hit.bg

[lilos]

ami to nqma nikakvo zna4enie ot kade 6e se podade signala

dali prez 4in4 ili prez evroskart 6tom ima kartina na televizora

zna4i problema ne e v kabela.



az drugite problemi gi opravih gore dolu ama kartinata e 4erno bqla

<img src=icon_smile_sad.gif border=0 align=middle> a i probvah tam vsi4kite nastroiki palB palI ..i taka nt.

oba4e na NTSC M e nai dobre v smisal gore dolu kartinata se smestva

pravilno v ramkite na televizora.Ima edna nastroika za izbor na strana ama bulgaria q nqma (oba4e ima albaniq)



nqma li nqkakva programka za nastroika na tv-out na radeon video karti 6toto tv-tool e samo za nvidia



p.s spomnqm si 4etoh edna statiq za tv-out v vesnik komputri

tam be6e opisano kak da se izvede ot s-video signal kato bqha

poso4eni konkretni 4ipove za tv-out i shemi za na4ina im na svarzvane i se slaga6e nqkade kondenzator (ta ako vse pak problema e ot kabela moje da izpolzvam buksata mu i da si napravq prehodnik kam 4in4.Ako nqkoi znae kak se svarzva da prati shemata po maila)

[lilos]

dnes probvah da si updaitna biosa na kartata

i go redaktirah s edna programka kato poso4ih pal sistema a ne ntsc

posle zabelqzah 4e v nastroikite na kartata sa se poqvili novi

sistemi za tv-to pal combinationN pal k1 i ntsc(j)

oba4e pak e 4erno bqlo <img src=icon_smile_sad.gif border=0 align=middle> <img src=icon_smile_sad.gif border=0 align=middle> a televizora mi e sony(ako ima zna4enie tova)



PLS help

[lightmaster]

S video out kabelaaaaaaaaa !!!!!



have no fear lightmaster is here

[Julian]

Абе ти на телевизора S-Video вход имаш ли? Ако нямаш на какво се надяваш.



http://julmin.hit.bg

[lightmaster]

S-video vhod na TVto nqma gledahme v edin magazin edni kabeli i toj vze 4e izbra naj - kalpaviq.

zna4i S-video out kam EVROSKART i s dva 4in4a



btw. tova 4e nqma S video na TVto ne bi trqbvallo da pre4i



have no fear lightmaster is here

[Julian]

Абе кат знам какви боклуци се продават по магазините нищо няма да ме учуди. Аз затова сам си направих кабела за телевизора. Дори да ми се скапят спойките винаги мога да си ги оправя.



http://julmin.hit.bg

[Suren]

Ами това че TV-то ти е Sony има голямо значение,защото на тях много често слагат S-video вход! Сигурен ли си че няма такъв ???



This simple adapter can be used to convert Y/C video (S-video) to a composite video. This adapter is useful in cases where your video output device has only S-video output but your signal source accepts only composite video input.





Y-ground------------------+

+---------- RCA/composite ground

C-ground------------------+



Y-------------------------+

+--------- RCA/composite video

C------------||-----------+

470pF



This circuit can be quite easily build inside a the S-video connector case if a physically small size 470 pF (ceramic) capacitor is used. Larger capacitor values will also work, but cause picture to become "softer".

This circuit works in practice quite well even though the circuit operation is not ideal. This means that impedances and signal levels not matched exactly right, but near enough to work accetably. The picture quality you get from this circuit is is good, but not as good as with best possible composite video output circuitry.



Here is the pinoput of the S-video connector (picture is a view to female connector on the equipment end):

маркер

4 o o 3

2 o o 1



1 Y ground

2 C ground

3 Y (luminance+sync)

4 C (crominance)



Can the circuit used in other way ?

If you try to connect the circuit in opposite way so that you have a composite video signal which yoiu want to feed to S-video input then you might wonder would this circuit work also in that way. The answer is that the circuit sort of work also in this way. If you connect a comoisute video source to a S-video input of your TV using this circuit, you will get a full color picture on your TV screen. The downside of this is that the picture quality will be worse than if you were using the real composite vidoe input of your TV. The reason for this is that after the circuit the color information is still in the brighness signal, you you see some interference on the screen caused by color subcarrier which gets to the screen. This all means that you can use this circuit as last change in situations where you don't have a composite video input. The picture quality is degraded, but propably still usable for some not so demanding applications. A real well working solution would be much more complicated than this circuit.





Извинявам се за дългия пост



Нещо не излезе както трябва, ако някой не е разбрал ще ме пита на е-маил-а







Edited by - Suren на 26/07/2002 23:49:08

[lilos]

Da to4no taka stana.Oba4e kakav be6e problema za6to se vijda6e

4erno bqlo kato signala minava6e prez evroskarta ami prosto dvete drugi kra4eta 3 i 4 koito nosqt signal e trqbvalo da se svarjat

a tova v originalniq kabel ne e bilo napraveno (kogato e ednoto kabel4e se vijda 4erno bqlo a kato sloji6 i drugoto stava cvetno)

kondenzatora moje da se sloji (az izpolzvah 2 po 222pF paralelno varzani) s nego kartinata stava po sempla nqkak si,daje az bih prepora4al edin trimer kondenzator koito da se naglasi po precenka)



a dali se izpolzva 4in4 ili evroskart nqma ama absolutno nikakvo zna4enie daje prez evro skarta ako se vgledate vnimatelno nqma tezi miniatupni trepteniq na kartinata izglejdat kato malki usporedni lenti4ki no moje bi tova e ot moita buksa koqto e ikarana otpret i malko hlopa kato go varja otzat prez evroskarta i tezi trepteniq i4ezvat.

Ka4estvoto na kartinata e dobro no az sam siguren 4e ima i drugi po golemi shemi za preobrazubane na s-video kam tv-out i to za vsqka otdelna video karta(v zavisimost ot 4ipa koito se izpolzva za izhoden signal kam tv-to) i estestvenno tqhnoto ka4estvo 6e e po dobro.Az 6e tarsq iz neta i ako namerq ne6to svqsno 6e napi6a tuka.

[Suren]

На моята видеокарта с ТВ-аут чип Chrontel 7007A има изведени и С-видео и чинч, като са изведени от самия чип направо, така че не знам какво става в него, може и да има по-сложна схема

[lilos]

a na atito kakav e 4ipa im za video izhod??