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How does my VCR know what channel is selected when displaying input from a DVR connected via Composite Video?
I have an Emerson Digital Video Recorder (Composite Video Out) connected to a Panasonic Video Cassette Recorder (Composite Video In). The VCR (RF Out) is connected to a Sharp Television (RF In). Both the DRV and VCR are connected to Comcast Cable via RF In.
I set the TV to channel 3 to display the output from the VCR. I set the VCR to 'Line 1' to pass the DVR output to the TV. I set the DVR to channel 6 (KDKA in Pittsburgh).
When I press 'Display' on the VCR remote, the time, tape count and channel are displayed on the TV. With the equipment set up as described above, KDKA is displayed by the VCR as the channel.
How does the VCR know what channel is selected on the DVR when they are connected via Composite Video? This only works with some channels. Other channels display 'Line 1' as I would expect.
The Panasonic's have auto-setup and are able to read data that is in the video signal that isn't displayed. It uses this to auto-set the time and channels. It must be sensing the data in the video and displaying it, even though it's being passed through from the DVR.
Consider using the Composite video outputs on the VCR and the Composite video inputs on the TV, if it has any. You'll get a much better picture than with the RF re-modulation.
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