[mythtv-users] Noise on TV signal from unpowered VCR

Gert van der Knokke gertk at xs4all.nl
Thu Sep 16 17:08:34 EDT 2004

Shaun Jackman wrote:

>I'm getting some visual noise on my TV signal. It's related to cabling
>somehow. Here's the wiring diagram:
>splitter - capture card
>If the VCR is turned off, I see terrible noise on my TV signal. If the
>VCR is turned on and the TV is tuned to channel three (to display the
>VCR's TV signal) I don't see any noise.
This is normal behaviour for an unpowered VCR as the pass-through 
function of the modulator is an actively powered piece of electronics 
(buffer/amplifier). If you unplug the VCR the pass-through will be 
disabled. The remaining signal is just the 'leakage' of the input to 
output. Just leave the VCR plugged in and all will be fine or when not 
in use just connect the two connectors from the VCR input/output to each 


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