The signal is "macrovisioned" to thwart recording. No pass through but a direct connection should work.
I am trying to conect the following:PANASONIC DMR-EZ48VK DVD / VHS Recorder EZ485VK~ PLAYER
For some reason I can't get the digital (Comcast) signal to pass through the recorder. The connections are all correct. It has a built-in tuner.
I can get a cable conncection which works off the traditional channel 3(as if I connected direct to the tv) but I can't get a digital cable signal (No Video 1, 2, 3 or 4). It actually messed up my digital when I disconnected it.
Panasonic has been no help.
Any ideas? or should i just get Comcast to come in?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic