Re: #pluto #pluto
Vielen Dank fuer die Antwort,
Please explain for dummis: why must I engage the geo beacon? I don’t need it for frequency stability.
I use the Pluto for a few month now. Works fine with v3.0.15 No spurious. I put the curser over the signal I want to respond to and push the PTT. Works.
Only problem is the disconnects of the USB, in spite of the mods suggested to the grounding in the Pluto. Aber das ist eine andere Geschichte.
Offset is off
Re the gain: That is what I mean with gain sensitivity being high.
With 3.0.15, Audio gain 60, compression 60, I need a drive setting of 75 to create a two tone signal 6dB below the beacon. No spurious.
With 3.0.17 the drive setting is 18, the spurious are there and the tx output frequency is fixed, no matter what the tx frequency window says.
Am well aware about overdriving things. Maybe there is some default setting I have not discovered yet?
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Siegfried Jackstien via Groups.Io
Sent: Wednesday, December 18, 2019 13:08
Subject: Re: [SDR-Radio] #pluto
you did not engage geo beacon (or why are you txing out of your own rx window?!?)
i use a pluto now for nearly a year (as long as qo100 is on air) ... and my pluto is ALWAYS txing fine (no spurii to be seen)
do you have tx offset switched on?!? (switch it off ... no need on qo100 for tx offset!!)
i see that you use a very low drive from the pluto (only 20%)... means you have a very high gain amp BEHIND the pluto towards antenna
that means that "ghost signals" or spurii that would normally not be seen ... are then still to be seen on the transponder
add attenuator behind pluto and use a bit higher drive with such a high gain amplifier (guessing you use a datv setup on nb transponder?!?)
best is drive area of 80 to 90 % (that gives cleanest signal here on my station) settings above 90 ... and the pluto is not so clean anymore ... (same as with all trx ... fullpower gives dirty signal)
with such a high gain behind the pluto you will see those ghost signals ... adding attenuator and using higher drive in pluto may solve that
greetz sigi dg9bfc
Am 18.12.2019 um 09:02 schrieb frank@...: