i am using Adalm Pluto over LAN. RF Side works perfect with SG-Labs Amp on a 5 turn Helical, but i have
problems with my modulation. I am using a Headphone/Mic from Heil on the (normally fine) built-in Soundcard
on my Desktop-PC. Level ist very low from mic, so i used +30dB preamp setting in Soundcard and have to level up more than 90% of Mic level at SDR Console to get a reliable SSB signal, but Modulations is absolutely worse.
If i use the SDR Consoles internal test Tone, all looks ok. I have clean spectrum on RF with double tones wich are generated within SDR Console, (measured after PA with my HP Scpec, so i think the problem must be in Audio/Sound
(or between my ears
Also i got hi freq. audio distortions wich are not noticable if i monitor the audio via the soundcard itself.
What type of audio interfaces / microphones are mostly used here i the community?
Thanks in advance!
BTW: all mods on Pluto done, & pwr supplys are clean and no RF strays in power lines / Mic / Reference freq. cables measurable....