APRS Knowledge Quest Phase 4: Fired up SATSAGEN with the ADALM Pluto SDR to look at TX deviation during the APRS burst. All 3 radios look reasonable for deviation (although did see some occasional splatter on the Yaesu VX-8G output). Learned how to use TX deviation measurement on SATSAGEN SW, but did not resolve why radios work poorly in the car (other than there are few digi’s along my typical route). This SW also works RX-only with RTL-SDR sticks. #HamRadio #RadioTest #TestEquipment