Over modulation?
Posted: Fri Mar 03, 2023 11:44 am
I'm not certain, but it sounds like some "loud" stations break up with a "beep" while otherwise being a good signal. This seens to be more of an issue with an MMDVM board than a DVAP dongle.
In the MMDVM config (Expert, Edit MMDVM Host), there are several level settings that by default are all "50", which I guess means 50%. Reducing those to 30 seems to reduce the break up, but not entirely clear it. Reducing the levels below about 30 seems to stop things working...
I haven't altered the DC Offsets but have the RX and TX frequency offsets set pretty close to optimum and obtain less than 0.5% BER on DMR.
Anyone been there and fixed this issue?
73 Dave
In the MMDVM config (Expert, Edit MMDVM Host), there are several level settings that by default are all "50", which I guess means 50%. Reducing those to 30 seems to reduce the break up, but not entirely clear it. Reducing the levels below about 30 seems to stop things working...
I haven't altered the DC Offsets but have the RX and TX frequency offsets set pretty close to optimum and obtain less than 0.5% BER on DMR.
Anyone been there and fixed this issue?
73 Dave