[mythtv-users] Signal strength now reporting 50% instead of 100%

James Abernathy jfabernathy at gmail.com
Sat May 7 02:05:30 UTC 2022

On Fri, May 6, 2022 at 9:38 PM Daryl McDonald <darylangela at gmail.com> wrote:

> On Fri, May 6, 2022 at 4:53 PM Klaas de Waal <klaas.de.waal at gmail.com>
> wrote:
>> On Fri, 6 May 2022 at 22:16, James Abernathy <jfabernathy at gmail.com>
>> wrote:
>>> I've been on v32 for sometime now.  Today I was watching live TV via
>>> Mythfrontend and noticed that all my stations' signal strength reported in
>>> the 40-50% when they normally report 90-100%.  I'm about 10 miles from the
>>> antenna farm in Garner, NC where all the major stations locally have their
>>> towers.  So signal strength has never been a problem.  I do not have any
>>> issues with breaking-up of my pictures or errors in my recordings.  My
>>> antenna is in the attic and it, the cabling or the Hauppauge WinTV Quad
>>> tuner cards have not been disturbed.
>>> The odd thing is I also have a HDHomeRun Duo connected to the same
>>> antenna and its signal strengths are still high like they used to be.
>>> Has something changed in the way Mythtv calculated signal % for the
>>> display on Live TV?
>>> Nothing has changed in this part of the software recently as far as I
>> know. I have not really been looking at this for a while but it is always
>> possible that something has been changed accidentally. It could also be
>> that there has been a change in the Hauppauge driver or in the Linux DVB
>> software that causes this. The HDHomeRun devices compute the signal
>> strength all by themselves and MythTV just receives the number. If that is
>> still the same then your antenna signal is most likely also still
>> completely OK.
>> Klaas.
>> _______________________________________________
>> Could it be the on-board amplifier of your Quad tuner?
1. I'm using the standard Kubuntu 22.04 kernel 5.15.0-27-generic. So I'm
not using the special Hauppauge kernel.  I've been doing this for several
years.  I don't think there is anything in the Hauppauge kernel that is not
in the main kernel.
2. I'm not sure how I would test the on-board amplifier. At this point I'd
lean toward it being a display software issue because in the past if the
signal on Live TV showed 50% or less I could not lock the signal enough to
view it.  At this point I get no errors on any channel and the signals are
mostly in the 50s.  My PBS station 40 miles away is usually around 50 now
reads 25 and it's coming in clear.

Jim A
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