MMDVM Repeater Issues.
Posted: Mon Apr 06, 2020 4:41 pm
I got a MMDVM repeater board last week. I cannot get it to work correctly.
In when receiving local RF in simplex mode the BER is all over the place. From .3% to 5% + from one local xmission from the HT to another. The TX audio decode on the HT is intermittent also when listening to TG91 for instance I have tried an Icom IC-F121 mobile and the Icom 706mk2g. Should not be such a problem to dial it in. I set the deviation to the same level as the little Jumbo Hotspot.
When I switch the hotspot to duplex mode the HT decodes the call information from the internet on the screen but there is no audio. It does not detect the local transmission from the HT either.
I am running the MMDVM board with a Raspberry Pi Zero W. I wonder if the Pi Zero is running out of snot because of its instability/inoperability.
The MMDVM board I am using is shown in the attachment.
FWIW, my Jumbospot with a Pi Zero runs great.
Once I get the MMDVM to work properly, I am going to try interfacing it to a UHF GE Mastr 2 repeater. It has a direct FM exciter which will hopefully work with the DMR data.
Thank you for reading.
In when receiving local RF in simplex mode the BER is all over the place. From .3% to 5% + from one local xmission from the HT to another. The TX audio decode on the HT is intermittent also when listening to TG91 for instance I have tried an Icom IC-F121 mobile and the Icom 706mk2g. Should not be such a problem to dial it in. I set the deviation to the same level as the little Jumbo Hotspot.
When I switch the hotspot to duplex mode the HT decodes the call information from the internet on the screen but there is no audio. It does not detect the local transmission from the HT either.
I am running the MMDVM board with a Raspberry Pi Zero W. I wonder if the Pi Zero is running out of snot because of its instability/inoperability.
The MMDVM board I am using is shown in the attachment.
FWIW, my Jumbospot with a Pi Zero runs great.
Once I get the MMDVM to work properly, I am going to try interfacing it to a UHF GE Mastr 2 repeater. It has a direct FM exciter which will hopefully work with the DMR data.
Thank you for reading.