I have used digirig 1.9 and Digirig Lite with BaoFeng UV-5RTP, BTECH UV-5X3, Kenwood TH-D72A, Kenwood TH-F6A, Kenwood TM-V71A, Elecraft KX2. No audio level problems so far.
I see this thread calls out digirig 1.10. I havena compared schematics. We’d have to be told if there are audio level changes from 1.9 to 1.10.
I use several different methods to look at my TX audio.
- Scope. These are audio levels, so even an inexpensive USB scope will do.
- I use fldigi’s SIG display (waterfall, FFT, SIG). I set the TX to 500 Hz (audio, of course). I TX from one radio, and RX on another. I look at the RX waveform for distortion as I adjust all the bits in the TX and audio streams, including fldigi, CODEC levels, sound card level, if any, and radio. All of those affect signal quality.
- I use Zeitnitz (Windows) software scope to look at both TX and RX signals.
- Please see TM-V71A sanity check before I cut ATT - #7 by TheDustyKey for the inline attenuator I built. That was for RX, not TX, but it is convenient, and takes advantage of digirig components, to minimize components.