juribeparada / MMDVM_HS

MMDVM HotSpot: firmware for ZUMspot or MMDVM_HS based boards (D-Star, DMR, YSF, P25, NXDN and POCSAG)
GNU General Public License v2.0
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High BER and interruptions on DSTAR while sending GPS data #138

Closed ghost closed 3 years ago

ghost commented 3 years ago

Hi, I have encountered a particular issue while transmitting in DSTAR, sending my GPS data at the same time: on my local pi-star dashboard BER is always at 0%, but on the reflectors people listen me with lots of interruptions, and the transit on the reflectors side always has BER peaks more than 50%. But disabling the sending of GPS data, the issue disappears (we can check BER on REF080 side with our own advanced dashoard). This here happens both using an Icom ID-5100 and a Kenwood TH-D74. I also tried to increase the frequency shift on both my dualhats, and temporary setting them as simplex, but nothing changes. I tried to downgrade to 1.4.17, but nothing changes. I own a DVMEGA too, and doing the same tests with this one the issue does not occur, so I came to the conclusion that it is a bug in the firmware. I don't have the skills to watch in the source code, could someone do this check? Thank you very much Giuseppe, iw7dvm in Taranto