Problem via hf MMDVM

VE4HTO
Posts: 21
Joined: Sat May 27, 2023 11:09 pm

Re: Problem via hf MMDVM

Post by VE4HTO » Sun Jun 25, 2023 3:42 pm

I've had the same problem with one of my 9600. On my Openspot4 everything worked as expected, lately i added a Pi-Star based hotspot to my setup and my 9600 wasn't received at the Pi-Star. My other 9600 and my UV390 worked just fine as they should. I digged a little deeper and found the 9600 in question was about 400 hz off frequency, usally one would adjust at the hotspot (Rxoffset parameter) for that but this caused problems with my other radios. I ended up with adjusting the frequency calibration on the one 9600. Fine tuning done by optimizing the BER at the PiStar dashboard. Now everything is working on both hotspots and all three radios.

I believe the Pi-Star is a bit less tolerant to Frequency deviation on a received signal compared to the Openspot4.

Hope that will help someone...

DE2RVK
Posts: 11
Joined: Fri Jun 16, 2023 2:09 pm

Re: Problem via hf MMDVM

Post by DE2RVK » Sun Jun 25, 2023 8:40 pm

I've now done the radio calibration for 430 mhz freq adjust from 43 to 70 and it works again at the first pi star hotspot thanks

DE2RVK
Posts: 11
Joined: Fri Jun 16, 2023 2:09 pm

Re: Problem via hf MMDVM

Post by DE2RVK » Sat Sep 16, 2023 12:35 pm

Since the last update from New Beta 2023 09 03 to New Beta 2023 09 15 I can no longer get a connection to any of my MMDVM hotspots. With the New Beta 2023 08 18 is it working or is there something that needs to be readjusted now

VK3KYY
Posts: 8143
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Problem via hf MMDVM

Post by VK3KYY » Sat Sep 16, 2023 8:45 pm

DE2RVK wrote:
Sat Sep 16, 2023 12:35 pm
Since the last update from New Beta 2023 09 03 to New Beta 2023 09 15 I can no longer get a connection to any of my MMDVM hotspots. With the New Beta 2023 08 18 is it working or is there something that needs to be readjusted now
Nothing changed in the RF etc for any of these versions

Did you revert to the old firmware and confirm whether the problem still exists.

Hotspots are not reliable, many people have problems regardless of which radio they use.

Also check your hotspot calibration

DE2RVK
Posts: 11
Joined: Fri Jun 16, 2023 2:09 pm

Re: Problem via hf MMDVM

Post by DE2RVK » Sun Sep 17, 2023 7:53 am

I first installed the firmware from version 2023 08 18 on the Retevis. Can the calibration also work with the MMDVM? All versions then no reaction on the MMDVM, which has changed since the last few versions? I'll wait for the next version

VK3KYY
Posts: 8143
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Problem via hf MMDVM

Post by VK3KYY » Sun Sep 17, 2023 9:17 am

DE2RVK wrote:
Sun Sep 17, 2023 7:53 am
I'll wait for the next version
It won't make any difference

Reload whatever version last worked for you

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