I recently purchased a Coby DTV-140 ATSC set top tuner. It works fine for receiving OTA signals from a large outdoor antenna. It is connected to an overhead projector with component video cables, and audio via SPDIF digital to a receiver. Excellent picture and audio for many OTA stations in Denver.
I also have Comcast basic digital cable and 2 standard HDTVs, neither with a "cable card" or set top box. Both off the shelf TVs will tune the digital channels from Comcast and display the current signal - some stations are in 720p and 1080i.
I tried to input the Comcast cable to the Coby (same service at to the TVs) and there was no way to scan for stations.
Now the dumb question: why not????
The obvious answer is, the DTV-140 isn't designed to do that. But on the chance I'm missing something, is there any way to configure the 140 to tune the cable channels the same way 2 inexpensive, off the shelf TVs will tune cable.
If there is no way to do this with the 140, what HD tuner (without DVR) will do that. I want to be able to switch between OTA input and cable input to the projector from a tuner that has component video and digital audio output.
Thanks, DicknDenver