video sender in cable TV

[filjoa]

hi

I like transmit an video signal on my UHF signal, my ideia is connect an CCTV camera on my TV signal and can see it on an TV channel...

someone know an circuit for that?

best regards

 

[IanP]

Try something like:
https://www.qrz.ru/reference/micro/analog/mc1374.pdf
https://www.cedmagic.com/tech-info/data/lm2889.pdf
...

IanP
:wink:

 

[filjoa]

Hi

thanks for th links

but anyone try make this at home and have an mounted circuit?

best regards

 

[IanP]

If you don't want to build a video modulator use one taken from old otherwise borken VCR ..
Those modulators are typically about matchbox size metal boxes with antenna connector, take in power (usually around 9VDC), video signal and audio ..
Output is RF suitable for TV ..

IanP
:wink:

 

[filjoa]

Hi

I make it and it work on one TV... the signal don't go back to the other TVs is normal?

I make some like this: **broken link removed**

I have my cable antena and cable to TV conected on my tuner but only have signal on my TV cable is conected...

I need share my video signal for all TVs

best regards

 

[IanP]

Signals from those modulators are rather weak and might only work if all TVs are connected to the same network ..
Otherwise you need to substantially amplify signal from the modulator by adding proper power RF amplifier ..
Eg.
Ikusi - Line and Distribution CATV Amplifiers

IanP
:wink:

 

[Borber]

Any unauthorized transmitting in broadcast frequency bands is forbidden by law. You must use your private CCTV network.