Works in DMR, but in FM no! old device

[EB3AM]

Question for all, to see if we can solve it.

A few days ago a friend of mine who has a second-hand radioditty tells me if I can update him.
I live far away, and I try to upgrade remotely.
So install it OpenGD77 I get the error of the flash memory.

I told her you sent her to my house that I would try to fix it.
Once here, I installed a version prior to the change of the memory of the calibration data, and it works ... Well, it works in DMR, but not in FM.
At a short distance, it received correctly, apparently, but did not receive the signals from the repeaters. (s9 + 20 on my walkie)
Nor does it transmit, the red light goes on, but the receiver only sees an increase in qrm. I searched with a vfo if the signal was off, but not. there is only qrm at the frequency where it should be transmitted.
And in DMR, everything works well.
The user tells me that he had never been able to make it work with repeaters, and he thought it was not properly programmed. Presumably, I would already be "sick" before the upgrade, as the original codeplug was set up correctly.
Is it possible to recover the operation in FM?
I think it's a first generation device.
I tried putting the latest firmware, openGD77, but then it says "CAL DATA ERROR" or something similar.
Maybe a hard reset?

[LY1RF]

Have you tried to switch calibration off in radio menu?

[VK3KYY]

Cal data error means the radio has corrupt calibration data.

Load the firmware from earlier in March

E,g.

viewtopic.php?f=13&t=713

Backup the calibration on that radio using the cps

If you have a GD-77, backup your calibration

Then install it on the radio that’s not working

[EB3AM]

Cal data error means the radio has corrupt calibration data.

Load the firmware from earlier in March

E,g.

viewtopic.php?f=13&t=713

Backup the calibration on that radio using the cps

If you have a GD-77, backup your calibration

Then install it on the radio that’s not working

When I try to backup calibration, it say "calibration data not found, please update firmware"
and is just the latest version 0.0.0.6 of CPS.

Maybe an older cps version work?

[VK3KYY]

arrgg

Yes.

The newer CPS uses the new calibration location.

Sorry. You will need to load an older CPS


Or. Backup the whole of Flash, and then extract the section

8F000 - 8F0DF

[EB3AM]

it works!

I have done the following:
I recovered a CPS from February and tried extracting the calibration file.
He has extracted it, but trying to read it tells me that it is corrupt.
I thought, better a calibration file from another radio that will not have any calibration.
I extracted the file from my radio and injected it with the current CPS. The radio has risen.
I have put the latest firmware and it works fine, in fm and DMR.
By the way, now it works with calibration enabled in the options.
Previously, it only worked in FM if you turned off the calibration, and you used a firmware prior to the location change of the calibration data. Now, instead, I can install the new firmware versions.

Thanks!

[VK3KYY]

OK

The calibration from your radio may not be perfect for the other radio, but at least it is working

Your friend can perhaps use a frequency counter to set the Reference Oscillator in his radio.
You must set the radio into FM for this, and also have no modulation. e.g. perhaps plug in the programming cable, and do not connect it to a PC.
Hopefully there will not be any mains hum pickup.

When using the frequency counter, set the radio to minimum power and also set the display backlight to OFF as this will cause less QRM on the FM audio as there is less processing in the radio to support the backlight PWM dimming


We also probably need a Calibration mode, which sets the microphone input to as low gain as possible etc

[VK3KYY]

BTW.

I will modify the firmware, so that when a radio displays "Cal Data Error"

that the CPS comms still functions, so that a new calibration can be uploaded

[EB3AM]

well I think is good...

Old device with new calibration from my radio... in FM at 145100KHz (read 145.10009 MHz)

WhatsApp Image 2020-03-18 at 02.12.06.jpeg (149.07 KiB) Viewed 4796 times

Icom 706MKIIG at same frequency (read 145.99969 MHz)

WhatsApp Image 2020-03-18 at 02.12.06 (1).jpeg (188.53 KiB) Viewed 4796 times

My radio... I miss to remove CTCSS (read impossible....)

WhatsApp Image 2020-03-18 at 02.12.07.jpeg (188.24 KiB) Viewed 4796 times

My spectrum analyzer is not calibrated for years!

[VK3KYY]

OK.

I guess the Icom radio may not be correct either.

Or you could adjust the calibration in the GD-77 so its the same freq as the Icom 706MKIIG

I think the error is very small, so perhaps no point in adjusting