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Low strength ATSC broadcasts not accepted during scan of HDHomerun tuner

Added by Jeff Williams over 5 years ago

My home entertainment systems has used TVHeadend to manage 4 HDHomerun tuners. Recently the only 2 local stations on VHF (7 and 9) became unreliable, at least through TVH. It turns out they are completely usable though the native HDHomerun interface. They are, however, weak signals relative to all the UHF broadcasts. My antenna setup only utilizes an amp for the UHF as it was put into service at a time when all ATSC broadcasts were UHF. That said, until recently the un-amplified VHF has been just fine. I'm not sure if they have lowered there power, or if something else is to blame.

The HDHomerun tuners receive the signal just fine. Signal strength is in the 45-55% range, and Signal Quality is >80%, and Symbol Quality is reported as 100%. In viewing the stream, it appears flawless.

The issue is that TVH refuses to recognize the signal anytime the strength falls bellow 50%. At those time, the previously recognized services become unusable. Forcing a full scan of the network, or a scan of the single MUX, results in failed scan result of the 2 VHF channels.

Is there a way to configure a lower minimum signal strength threshold?


Replies (2)

RE: Low strength ATSC broadcasts not accepted during scan of HDHomerun tuner - Added by Jeff Williams over 5 years ago

This morning I watched the signal drop as atmospheric conditions changed. The signal strength was initially reported at 52%, and I was able to watch the most problematic channel through TVH. As soon as the signal strength dropped below 50%, TVH stopped passing the signal through.

Even though TVH decided to stop, the HDHomeRun receiver continues to receive the channel with the following stats.
Signal Strength 47%
Signal Quality 71%
Symbol Quality 100%
As such, if I access the stream directly from the HDHR receiver using VLC, it plays just fine.

Really hoping there is some way to make the TVH decision less arbitrary - like based on signal quality rather than strength.

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