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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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Nano DV board has HIGH BER on YSF mode while LOW BER on DMR mode #69

Closed shawnchain closed 5 years ago

shawnchain commented 5 years ago

FW: Nano_DV-v1.4.8 20180908 12.2880MHz dual ADF7021 FW by CA6JAU GitID # b9fd0b1 Board: Nano DV board by BG4TGO Mode: duplex, YSF/DMR enabled Desc: DMR RX/TX is ok while YSF has high BER

The log dump:

M: 2018-09-16 19:33:00.944 DMR, Logged into the master successfully
M: 2018-09-16 19:33:16.453 YSF, received RF late entry from BG5HHP-2DR to ALL
M: 2018-09-16 19:33:16.954 YSF, received RF end of transmission, 0.6 seconds, BER: 15.2%, RSSI: -133/-133/-133 dBm
M: 2018-09-16 19:33:19.733 YSF, received RF late entry from BG5HHP-2DR to ALL
M: 2018-09-16 19:33:20.234 YSF, received RF end of transmission, 0.6 seconds, BER: 20.5%, RSSI: -133/-133/-133 dBm
M: 2018-09-16 19:34:05.661 YSF, received RF late entry from BG5HHP-2DR to ALL
M: 2018-09-16 19:34:05.951 YSF, transmission lost, 0.3 seconds, BER: 38.7%, RSSI: -133/-133/-133 dBm
M: 2018-09-16 19:34:20.856 Downlink Activate received from BG5HHP
M: 2018-09-16 19:34:21.718 DMR Slot 2, received RF voice header from BG5HHP to TG 460501
M: 2018-09-16 19:34:22.618 DMR Slot 2, received RF end of voice transmission, 0.7 seconds, BER: 1.6%, RSSI: -133/-133/-133 dBm

Any hints on that ?

juribeparada commented 5 years ago

No idea, most of the times are just frequency offset issues. I don't have a 12.2880 MHz board in this moment for testing. Also, some people have reported high BER with YSF when they use their boards with a noisy power supply.