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Old 3-Sep-2020, 2:43 AM   #19
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
Originally Posted by verder
Here's the SpectrumSpy trace from my antenna:

https://imgur.com/a/XMGGyx7


Thank you for the UHF scan; nicely done.

KVRR virtual 15-1 RF 19 shows a little more than the minimum SNR for reception, but could be a problem at times

WDAY virtual 6-1 RF 21 is your strongest channel; shouldn't be a problem

KRDK virtual 4-1 RF 24 is a little stronger than KVRR; could be a problem at times

K28MA virtual 28-1 RF 28 is very weak; doesn't look strong enough for tuner lock in this scan

KXJB virtual 30-1 RF 30 is fairly strong but shows possible multipath problem. It is listed as second in strength after WDAY, but is a low power station
https://www.rabbitears.info/tvq.php?...s&facid=185885

KVLY virtual 11-1 RF 36 shows just barely enough SNR for a tuner lock and would be expected to have problems

This is my UHF; CH 14 doesn't decode. I like to show the settings and have added arbitrary numbers to the gain scale. I bring the gain up until the noise floor just starts to rise and stop, which should show the correct SNR.



The weak signals got a little better this evening:
Videos, no audio

https://www.dropbox.com/s/eusj9k25wg...08-07.mp4?dl=0

https://www.dropbox.com/s/eusj9k25wg...08-07.mp4?dl=1

Here is FM and VHF-High, no audio
CH 7 is around 175 MHz; it is damaged by multipath and doesn't decode
CH 11 is around 200 MHz and usually does OK; the noise level is high

https://www.dropbox.com/s/fnjyuttou2...54-35.mp4?dl=0

https://www.dropbox.com/s/fnjyuttou2...54-35.mp4?dl=1
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Last edited by rabbit73; 4-Sep-2020 at 12:12 AM.
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