SMT32 board & FSK error rate
Posted: Mon Dec 27, 2021 5:01 pm
Hey Gents -
Going to do my best to try and relay this issue. So a buddy whom is an RF engineer connected up his digital service monitor so we could try and DMR adjusted for a repeater using the STM32. No matter what we seemed to try we couldn't get it into spec. The magintude was soild but FSK error rate was way to high. His monitor doesn't show the constellation well but never seems like we could get it full inline (hard to see but there are red "marks" there. Anyone spec-ed these out with a high end digital monitor before? As it stand, the unit does work but other than say Anytone's no other radios will work or hand shake (including commercial motos). Apologies if im not explain as well but attached is a screen cap doing the 1031 DMR test w/MMDVMcal.
Mark
KZ4FOX
Going to do my best to try and relay this issue. So a buddy whom is an RF engineer connected up his digital service monitor so we could try and DMR adjusted for a repeater using the STM32. No matter what we seemed to try we couldn't get it into spec. The magintude was soild but FSK error rate was way to high. His monitor doesn't show the constellation well but never seems like we could get it full inline (hard to see but there are red "marks" there. Anyone spec-ed these out with a high end digital monitor before? As it stand, the unit does work but other than say Anytone's no other radios will work or hand shake (including commercial motos). Apologies if im not explain as well but attached is a screen cap doing the 1031 DMR test w/MMDVMcal.
Mark
KZ4FOX