On 06/23/05 10:50 ET, Spiky said...
You can't even see it. Digital vs analog RF signal,
different technology that the NTSC tuner just
doesn't see. Maybe the snow would look slightly
different, I don't know.
I have a true "legacy" device, a Leader antenna signal meter from the mid eighties. It has dial tuning, so you can carefully tune around all of VHF and UHF. It has an AM detector so you can zero in on analog video for signal strength.
I finally have realized that when I tune across a digital channel, I get a hiss from the speaker, and this can be peaked (tuned in). So, an FM detector will only get hiss. This sort of reduces the question to asking why you only get loud hiss when you play a dts disc in a CD player. It's because the signal is not interpretable by the device.
There is ONE way to see if you have a digital station on an analog channel -- try to put a modulator on that channel and mix with the antenna signal. If the modulated signal is all screwed up, then you are looking at an analog signal mixed with a digital signal, and the TV just can't clearly show the analog signal.