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If you're using rx.py try setting "--gain-mode 0" on the command
line.<br>
That parameter is not implemented in multi_rx.py but if you change
it in one app (e.g. gqrx), it will persist in other apps until you
power cycle the airspy dongle.<br>
<br>
Graham<br>
<br>
<div class="moz-cite-prefix">On 9/5/20 8:25 AM, Graham Norbury
wrote:<br>
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<blockquote type="cite"
cite="mid:CAO-hfqWFWhP4KqQ3DbxAbBfki_Z0DtGMpjBVmJRhN+e0W6tWxQ@mail.gmail.com">
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<div dir="auto">This happens when the agc is turned on. Bill
Becks and I experimented with it a while back and found a way to
enable/disable, but at this moment I don't recall the magic
incantation.
<div dir="auto"><br>
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<div dir="auto">Graham</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Sep 5, 2020, 7:23 AM
<<a href="mailto:op25@zellners.com" moz-do-not-send="true">op25@zellners.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Quoting Graham Norbury <<a
href="mailto:gnorbury@bondcar.com" target="_blank"
rel="noreferrer" moz-do-not-send="true">gnorbury@bondcar.com</a>>:<br>
<br>
> I'm not aware of a master gain parameter. LNA, MIX, IF
are the three gain<br>
> controls. All take value between 0-15.<br>
><br>
>><br>
>> ./rx.py --args 'airspy' -N 'IF:10,MIX:5,LNA:15' -S
2500000 -f<br>
>> 774.55625e6 -v 7 -T P25PC.tsv -q 2 -V -2 -U -x 2
2>> airspy.log<br>
<br>
<br>
I reran my tests on this again, using -N 'IF:,MIX:,LNA:' like
above <br>
with 0-15 values.<br>
<br>
The spike for the CC, as a test, didn't budge at all, all 15,
or <br>
anything in between, no changes.<br>
<br>
It is significantly lower to start -20 to -40db lower v.
other <br>
programs and depending on antenna.<br>
<br>
Its almost like the gains are set to 0 or something and never
<br>
change??? ? ? ? ?<br>
<br>
Even using a duck direct to the Airspy with another program
results in <br>
much higher signals on its spectrum, and gains will adjust
accordingly.<br>
<br>
Changes will occur in another program with adjustments to all
3 <br>
(outside its faked single slider mode, using just the REAL
GAINS), <br>
gains shows changes in the signals and noise floor.<br>
<br>
In op25, not a bit of change at all in any thing. noise or
signal. <br>
Like these are not being sent? Or not taking affect?? ? ? 15
for all, <br>
combos of values, even things like 50 for all three, no
changes.<br>
<br>
<br>
I am not sure what to even try at this point? Other than
missing lib <br>
when it was compiled??? I didn't have the airspy then or
airspy <br>
pacakges installed when compiled.. does that change
anything??? It <br>
seems to work regardless of that, it tunes, it will trunk,
voice etc., <br>
just the gains don't seem to do a thing at all. IF there was
something <br>
missing in this, I would expect it to fail to tune, audio
etc..<br>
<br>
Ideas?????<br>
<br>
<br>
<br>
</blockquote>
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