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Problem for midify frequency oscillateur CPS
Posted: Fri Apr 05, 2024 3:33 pm
by f4igg
Hello, I have a frequency shift problem on my tyt9600 in uhf (not tested in vhf).
I don't fit into my mmdvm hotpsots. I don't want to change the offset in the pistar, otherwise my walkie talkies will no longer work.
In the dmr relays too, I have difficulty getting into them, the reception signal is very weak.
I am trying to modify the frequency of the oscillator with the CPS in the CALIBRATION section.
When I do a reading, there is a 1 second message on the tyt9600 screen but the page on the computer remains white.
I have a v4a version (installed v5).
thank you for your reply.
f4igg Eric.
Re: Problem for midify frequency oscillateur CPS
Posted: Fri Apr 05, 2024 4:35 pm
by SA0BUX
f4igg wrote: ↑Fri Apr 05, 2024 3:33 pm
Hello, I have a frequency shift problem on my tyt9600 in uhf (not tested in vhf).
I don't fit into my mmdvm hotpsots. I don't want to change the offset in the pistar, otherwise my walkie talkies will no longer work.
In the dmr relays too, I have difficulty getting into them, the reception signal is very weak.
I am trying to modify the frequency of the oscillator with the CPS in the CALIBRATION section.
When I do a reading, there is a 1 second message on the tyt9600 screen but the page on the computer remains white.
I have a v4a version (installed v5).
thank you for your reply.
f4igg Eric.
The logical solution is to use a calibrated frequency counter and adjust everything into the correct carrier frequency.
Re: Problem for midify frequency oscillateur CPS
Posted: Fri Apr 05, 2024 7:22 pm
by f4igg
Thanks for your quick response, but how to change the value in the tyt9600 or computer in the cps?
There is no longer the frequency calibration offset in the fw opengd77. Just the power adjustment.
Re: Problem for midify frequency oscillateur CPS
Posted: Fri Apr 05, 2024 7:54 pm
by VK3KYY
f4igg wrote: ↑Fri Apr 05, 2024 7:22 pm
Thanks for your quick response, but how to change the value in the tyt9600 or computer in the cps?
There is no longer the frequency calibration offset in the fw opengd77. Just the power adjustment.
There are multiple pages of the calibration screen, use. SK2 + Down / Up
Re: Problem for midify frequency oscillateur CPS
Posted: Fri Apr 05, 2024 10:21 pm
by f4igg
Thank you, that's the answer I wanted.
I am at +22 (-128/+128) in vhf and also at +22 in uhf.
According to my SDR I have +700 Hz in UHF and +400 Hz in VHF.
Re: Problem for midify frequency oscillateur CPS
Posted: Sat Apr 06, 2024 4:23 am
by VK3KYY
f4igg wrote: ↑Fri Apr 05, 2024 10:21 pm
Thank you, that's the answer I wanted.
I am at +22 (-128/+128) in vhf and also at +22 in uhf.
According to my SDR I have +700 Hz in UHF and +400 Hz in VHF.
Is your SDR calibrated?
IMO all you can use an SDR for is to compare frequencies, but won't know the absolute value