forum.pistar.uk

but no idea how to adjust the ber with a dvmega

have no idea how to adjust ber with a dvmega tried in the ssh but got error not suported

ve6edf wrote: ↑Wed Apr 22, 2020 2:41 pm but no idea how to adjust the ber with a dvmega

Trial and Error -- Expert menu, MMDVMHOST
RxOffset
TxOffset
https://www.ailunce.com/blog/How-to-set-Rx-Tx-Offset

ve6edf wrote: ↑Wed Apr 22, 2020 2:52 pm have no idea how to adjust ber with a dvmega tried in the ssh but got error not suported

... or https://amateurradionotes.com/pi-star-n ... #tuningber

I had my DVMega firmware chip get corrupted once which gave similar results to what you're experiencing. I flashed firmware to another chip and installed the chip and it worked fine. Then I flashed the firmware back to the original chip and it worked as well. My setup isn't hacked for an upload from the Pi, so I had to use an Arduino board to program.

I also just had my SD card go bad on my DVMega hotspot recently. The card was old and been in service for quite a while. The way we're using SD cards is beyond their design. I run a Bitcoin/Lightning Network node on a Pi and to make that stable with all the read/writes I had to set it up to run from a hard drive. I also have a little Pi server that I set to work with a 100 GB thumb drive that has been pretty stable for quite a few years.

WY7JT wrote: The way we're using SD cards is beyond their design.

For most of the time pistar runs in a read only state, which goes some way to mitigating this.

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Remember the dvmega doesn't use mmdvm firmware so it won't have compatibility for use with pistar-cal (mmdvm-cal)

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this is a dvmega dual as far as i know it don't have the removable chip like the single band maybe some one can tell me the offset tx ant rx of there dvmega dual band

ve6edf wrote: ↑Sat Apr 25, 2020 12:34 am this is a dvmega dual as far as i know it don't have the removable chip like the single band maybe some one can tell me the offset tx ant rx of there dvmega dual band

While there may be some baseline, the optimum values depend upon both the board and the radio one is using to contact it.

And if it helps... My dual-band (running on 70cm -- the offset might also be sensitive to the frequency in use) is using offsets of: 0 and 0 respectively