[Suggestion] Four analog signals with one coaxial cable

[intel]

Hi friends;

In AHD resolution, is it possible to carry four CCTV signals with a single coaxial cable of 500m? There are fiberoptic mux / demux products on the market, but both the device and the cable are expensive. Cable termination and assembly are both difficult and expensive. Is there a card or module that can do this? I think it could be with telemetry, but is there a product or circuit ready for it? I could not find. I'd appreciate it if you had a suggestion.

[Sideshow Bob]

 If I understand your problem that is cable distance. A HD CCTV Camera Video Amplifier https://www.google.com/search?q=A+HD+CCTV+Camera+Video+Amplifier may help you if it is the cable distance that causes problems. With such a device you may be able to boost your range over 500 meters at least. Without such a device a RG59 may top out about 250 meters give and take.

[intel]

Hi;
After making a request from you, in the searches I made, I found the product link below. I'm trying to do something like this:
https://www.aliexpress.com/item/2052970738.html

[pickit2]

cheap on ebay
https://www.ebay.co.uk/itm/1Pair-4CH-Digital-Fiber-Optic-Video-Audio-Data-Converter-Transmitter-Receiver/183775338710?hash=item2ac9dd20d6:g:0b8AAOSwxLlcpFCB

[Vineyards]

Hi;
After making a request from you, in the searches I made, I found the product link below. I'm trying to do something like this:
https://www.aliexpress.com/item/2052970738.html

It seems you have found the product exactly doing what you are asking for. The next question then, will it really work? Considering the quoted price it should but beware I have bought a lot of products with high claims but no results.

[intel]

You are right.  They make good money with fiber optics.  If you have an idea for these products.  I was wondering if we could solve it by telemetry.  If I have success, I will tell you here.  I'm still investigating for now.In addition, dear Pickit2 does not want the customer to do the work with fiber optics because it increases the cost.  Thank you for your attention.

[solutions]

Don't forget to do the metric conversion with the AliExpress spec:

1 Chinese meter = 0.547 SI meters

[bellona]

I'm pretty sure it means 500 SI meter. Everyone use SI meter except for the tailors now in China.