Originally Posted by j_iliz
Hi Team, Am curious about what may be going on. I live in Pacifica and KRCB in Sonoma/Cotati frequently pixilates/vanishes on me. I love that station with all the cooking shows it has. What I am confused about is my Digiair pro meter on channel 23 shows absolutely no signal at all when measured at the antenna. The noise floor looks the same and on the surrounding channels at about 41.7DBmicroV and I don’t ever see a resolving signal pop up above this noise floor. But when I button up and scan for channels on my Tablo, KRCB gets picked up and the channel plays. Comments?
I also own the "Digiair pro". You may have the overload step attenuator on ... and not even know it .... Turn it off for true readings.
On a few rare occasions, I had to re-boot the analyzer. ... Plus it gets very hot after 2+ hours of continuous use.
It is actually very accurate.
I used to live near the Fairmont district of Pacifica back in the 1980s. From my memory there, KRCB and a few other stations had "fading" problems in about a 2 to 3 hour cycle.
Analog crystal clear one hour, snowy two hours later.
You can only lessen that impact with a maximum sized UHF only yagi-style antenna.
This is actually the worst time of year to be adjusting / upgrading your antenna.
The hot weather brings signal enhancement above "normal" reception conditions. Even wimpy antenna systems work now.
On a wind-less rainy day, reception should be near normal, and your meter readings should be true accurate.
You can find a outdoor elevation that works, lessen signal nulls, and gang antennas together, ..... with the analyzer.
You will sometimes find, the roof of a backyard shed, works better than the main house roof, ... for reception. Same goes for some "fence" or tree installations.
With a attic installation, ... expect weird results on UHF.
Such as simply walking below creates temporary multipath & dropouts only when you walk around, etc.
Usually I find it best if the antenna has a blue-sky path towards the transmitter. Hills within say 5 miles will create UHF reception problems.