[opendtv] Re: Transition report

Manfredi, Albert E wrote:

To me, the problem with VHF, high VHF at least, is not so much that
stations decided to use it, but it's that some misguided recommendation
says that 12 dB less ERP than analog is fine. And even worse than that,
that stations up and down the East coast have adopted ERP levels between
14 and 18 dB less than their previous analog signal. That's silly.

Even if by some theoretical turn of math you can show parity at 12 dB
less than analog, how does that account for the digital cliff? A dark
screen is what happens when one forgets about signal margin.


Today, I finally got some CH 6 reception by adding a pro-grade
20 dB gain RF amp to the VHF antenna 25 feet above ground.
Video still breaks up occasionally and the sound is gone 1/2 the time.
The 20 dB amp figure roughly correlates with your comments about ERP levels, Bert.
I also question the bandpass response of the signal displayed on the spectrum analyzer. Could this be caused by their CH 6 analog antenna?

JPEG image

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