How to inject a signal into a TV?

[Jon1967us]

Raising this thread again to ask...If I want to inject video from a set top box, can I use the F connector/coax from the box or should I use an rca coming from the composite yellow jack on the box?

[Yamamaya42]

Originally Posted by Jon1967us

Raising this thread again to ask...If I want to inject video from a set top box, can I use the F connector/coax from the box or should I use an rca coming from the composite yellow jack on the box?

the composite yellow jack on the box.

the F connector is modulated output
https://antiqueradio.org/A-V_AdapterForVintageTVs.htm

[Jon1967us]

Originally Posted by Yamamaya42

the composite yellow jack on the box.

the F connector is modulated output
https://antiqueradio.org/A-V_AdapterForVintageTVs.htm

Thx for the tip. I tried my pattern gen and composite out from my converter box and and it worked. I'm trying to isolate where smearing is being produced in the video chain, on my CTC-16XH. Fed the signal into the 1st Vid amp and there was smearing. Fed into the 2nd, and although the image was reversed, I didn't see evidence of it at that point, so I think it's between those two points, probably due to a leaky coupling cap...3.4pF(?)...