Tier2 vs Tier1 firmware

[14FRS2907]

Merci? je reviens vers vous ....

[F1RMB]

Merci pour vos reponses,
toutefois je maitraise assez bien les dernieres versions et le principe des times slots.
Utilisant en parallele dsdplus via pc , je connais les parametrages exacts de ce que je desire ecouter sur le portatif, TS CC , TG etant inutile !!
De plus les derniers firm, proposes d ecouter les deux times slots en meme temps si l option est choisie via le menu, donc mon souci ne vient pas de là.
Je precise depuis le debut que je rencontre des coupures audio en dmr, une erreur de TS ne me donnerai aucune reception DMR.
Une nouvelle fois je vous remercie pour le temps que vous m allouez, mais mon probleme reste etrange et bien reel.
73...

Une autre chose me vient à l'esprit, si par le passé vous avez installé un firmware officiel, certaines versions sont connue pour corrompre les valeurs d'alignement. Si je me souviens bien, il y a une astuce pour rattraper le problème, en flashant une version spécifique du firmware officiel. A voir...

[EA5SW]

More info on the recent buying GD77

After modify the last version of firmware.. I include a 10,50,100 Hz step resolution to test if the micro cuts in RX with some hotspots are made for frequency problems... without luck..

But one of my friends lower hotspot TX level to values 45-48 and the problems are gone...

This problem only appears with the openGD77 Tier2 versions, the OpenGD77 Tier1 and original Radioddity version don't are affected...

With this value the other talkys as MD380, MD390 don't receive well...

More test to come....

[EA5SW]

Change the Calibration parameters in CPS "Reference oscillator tuning" from 1000 to 995 do the trick and now the new GD77 listening to the hotspot...

[m1dyp]

good news

[Eb5ivb]

Change the Calibration parameters in CPS "Reference oscillator tuning" from 1000 to 995 do the trick and now the new GD77 listening to the hotspot...

I can confirm this behavior. My GD-77 is working 99.99% after changing this parameter. Audio cuts have gone
My default value was 996 and I have decreased it to 983. May be later adjustements of this parameter can improve the audio.
My testing conditions are a Motorola with MMDVM modem with 18W in antenna. Before adjusting this parameter the RX audio had cuts to a point to be unintelligible. Now is succesfully working.

Muchas gracias/Many thanks Jose, EA5SW.

[VK3KYY]

Interesting.

I wonder if we have missed some other offset when setting the reference oscillator value.

Because everyone seems to need to reduce their oscillator value

[KU4ZD]

I went into the calibration of both of the GD-77’s and adjusted 8F008 DAC word for frequency reference oscillator at UHF fine tune and 8F00A Frequency fine tune for DMR mode. (These are the only two settings I could see that would affect the UHF Frequency offset). 8F078 and 8F07A are the VHF addresses. I found that I was able to get (by trial and error) both of my GD-77's to work with my hot spot and local repeater by adjusting these values. I have the Reference oscillator tuning set at 1000 in the CPS now.

[VK3KYY]

I went into the calibration of both of the GD-77’s and adjusted 8F008 DAC word for frequency reference oscillator at UHF fine tune and 8F00A Frequency fine tune for DMR mode. (These are the only two settings I could see that would affect the UHF Frequency offset). 8F078 and 8F07A are the VHF addresses. I found that I was able to get (by trial and error) both of my GD-77's to work with my hot spot and local repeater by adjusting these values. I have the Reference oscillator tuning set at 1000 in the CPS now.

FYI.

The CPS changes the same values as the memory addresses you quoted.

In the long terms it would probably be useful if we had a way to dynamically change this to make the calibration a bit easier. Rather than to keep having to upload which causes the radio to reboot.

I guess one slight improvement would be to add a CPS command to the firmware to reload the calibration into the C6000 without needing to reboot

[Eb5ivb]

Change the Calibration parameters in CPS "Reference oscillator tuning" from 1000 to 995 do the trick and now the new GD77 listening to the hotspot...

I can confirm this behavior. My GD-77 is working 99.99% after changing this parameter. Audio cuts have gone
My default value was 996 and I have decreased it to 983. May be later adjustements of this parameter can improve the audio.
My testing conditions are a Motorola with MMDVM modem with 18W in antenna. Before adjusting this parameter the RX audio had cuts to a point to be unintelligible. Now is succesfully working.

Muchas gracias/Many thanks Jose, EA5SW.

After a couple of tests I had to increase the value of "Reference oscillator tuning" up to 990 if I want to use my duplex hotspot. The tests wit the Motorola were in simplex mode. With this value the audio cuts are less than before but I still have them.

Previous tests with firmwares only Tier I were succesful as far as I remember with my Motorola, not duplex hotspot obviously.