forum.pistar.uk

I have tested on 2 boards running Pi-Star 4.1.6.
- Board 1: Zumspot Duplex/on pi zero
- Board 2: Zumspot Classic/on pi zero
Both are running firmware: 1.5.2

BER testing was done using pistar-mmdvmcal
I set the frequency to 445525000 using the e option
I tested using BER Test Mode (FEC)… option K

When I key up and talk for an extended period of time there are no errors at all so I know my offsets are good.

When I send a photo using my ID-52 there are very high error rates. For a standard non-complex photo I experience 14k errors for a BER of 12-14%. Same with different photos. Error rates are the same regardless of if I send it via fast data or normal.

Wondering if there is some tweak or tuning outside of offsets to fix this. Changing offsets in either direction until mmdvmcal can no longer hear the radio does not change error rate.

I know this is an edge use case but wondering if there is anything I could do.

I have resolved my issue. So BER when doing this test with fast data is to be expected. My issue is that there is too much jutter /instability in my wifi network. I put an Ethernet adapter on my hotspot and plugged it into my switch, and I can send flawless pictures now.