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here for me that base setting of 50 db is a bit low ... depending
on lnb used i need 60 to 70 db (with visual gain to -30) ... then
the base noise (transponder noise) is at 0 dbuv (easier to
calculate levels that way) and the cw beacon is a solid s9
so just try it with a bit higher setting ... when switching
between manual and auto the levels should not change (much) so i
set the manual gain to show same as when using autogain ... that
worked fine here
no idea about the error but maybe simon can explain it
greetz sigi dg9bfc
Am 15.08.2020 um 10:24 schrieb Jean
With Pluto RX-Gain set to 'Manual' (default gain 50dB, visual gain
-30dB), the initialization seems to fail from time to time when
starting the radio (either after program start or after stopping
and restarting the radio, as shown in the screenshot). The overall
gain is then significantly lower, either manual gain must be rised
to maximum or visual gain must be set to around 0dB to get a
spectrum/waterfall comparable to the default condition. Changing
RX-gain to something else than 'Manual' does not show the issue.
Manually changing the RX-Gain leads to the same issue. I have to
power-cycle the Pluto in order to recover to normal usage.
Looking at the logfile, I see two error entries "Radio
PlutoSDR> Error writing Channel attribute
voltage_filter_fir_en = 1, error 22, Invalid argument" and
"Radio PlutoSDR> Error writing Channel attribute
hardwaregain = 50, error 95, Unknown error", but unsure if
there is a relation to these error entries.
This occurs with console 3.0.24 as well as with at least
3.0.23. There is also no difference in using the bundled
libiio.dll (which seems to be v0.17) or using the current
libiio.dll version 0.21.
Is there a workaround apart from not using manual RX-Gain setting?
73 Jean DJ0VL