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MMDVM INTERNET TX ISSUE
Posted: Mon Sep 02, 2019 4:20 pm
by n8tl
MMDVM board issue...cannot transmit through MMDVM board to internet. Board worked for short period when hot spot purchased. I can receive voice from internet to TYT MD380 radio via MMDVM board
with no issue. Just cannot transmit to hot spot and have that communication go out on the internet. Any thoughts appreciated.
Tom N8TL
Re: MMDVM INTERNET TX ISSUE
Posted: Mon Sep 02, 2019 8:41 pm
by KE0FHS
Hi Tom, have you checked your BER (Bit Error Rate)? If it's too high, that can cause the issue you're having.
https://amateurradionotes.com/pi-star-n ... #tuningber
Re: MMDVM INTERNET TX ISSUE
Posted: Wed Sep 04, 2019 12:28 am
by kd2lh
Also, activate and look at the "Live Log" available from the "Admin" page of Pi-Star.
It may help you diagnose what is happening.
You can calculate the necessary "RXOffset" and "TXOffset" by observing the BER Error rate while using the "Pistar-MMDVMCAL" utility. Search on the utility name and you'll find instructions for using it to evaluate DMR receive BER, as well as testing different offset frequencies. Initiate it from the Configuration / Expert / SSH Access window with "sudo pistar-mmdvmcal".