Page 4 of 6
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 7:29 am
by oh4va
Hi All,
As a new member on this forum I confirm the background interference in the transmitted voice of Ari's OH7FES DMR transmissions. The frequency of the pulse interference is about the same as in the DMR modulation (abt. 17 Hz).
Is it possible to insert a recorded sample on this forum or should I try to find another location?
PS. My own GD77 is on it's way to enter here next week.
73 de VA
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 7:38 am
by VK3KYY
oh4va wrote: ↑Sat Mar 07, 2020 7:29 am
Hi All,
As a new member on this forum I confirm the background interference in the transmitted voice of Ari's OH7FES DMR transmissions. The frequency of the pulse interference is about the same as in the DMR modulation (abt. 17 Hz).
Is it possible to insert a recorded sample on this forum or should I try to find another location?
PS. My own GD77 is on it's way to enter here next week.
73 de VA
No need to post this.
I'll produce a version with a much higher PWM freq and see if that helps
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 8:56 am
by oh4va
VK3KYY wrote: ↑Sat Mar 07, 2020 7:38 am
No need to post this.
Anyway, here is the recorded and cropped & normalized sound clip,
http://139.162.159.150/audio-sample/gd7 ... erence.mp3 A short clip is twice on this audio file. The interference is that pulsed sound which is as louder as brighter the backlight is set.
Edit: The original recording is this
http://139.162.159.150/audio-sample/200304_0074.mp3
73 de VA
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 11:03 am
by VK3KYY
That sound is not the frequency of the PWM
I've attached version which uses 100kHz PWM, but I doubt it will make any difference
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 1:21 pm
by G4EML
That sounds like it could be a bad ground connection between the radio and the front panel. I would try reconnecting the cables.
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 1:48 pm
by KU4ZD
Ok well watch for your email with instructions
VK3KYY wrote: ↑Sat Mar 07, 2020 3:00 am
KU4ZD wrote: ↑Sat Mar 07, 2020 12:02 am
I tried up update, I downloaded the updated CPS and this firmware. After updating the firmware I have a message on my screen that says '`Flash Mem Error" with the radio on or off and I can not load anything or get rid of the error message nor do anything at this point? any ideas?
Mike
I think I know whats wrong.
Your radio probably had invalid calibration data, which would also explain why its never worked that well
I'll email you, so that you can backup your Flash memory and email it to me
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 3:17 pm
by OH7FES
VK3KYY wrote: ↑Sat Mar 07, 2020 11:03 am
I've attached version which uses 100kHz PWM, but I doubt it will make any difference
Hello
100 kHz firmware had no effect on the background noise. Turning display light off eliminates the noise perfectly. Or setting brightness to 10% or less.
73 OH7FES Ari
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 8:44 pm
by VK3KYY
OH7FES wrote: ↑Sat Mar 07, 2020 3:17 pm
VK3KYY wrote: ↑Sat Mar 07, 2020 11:03 am
I've attached version which uses 100kHz PWM, but I doubt it will make any difference
Hello
100 kHz firmware had no effect on the background noise. Turning display light off eliminates the noise perfectly. Or setting brightness to 10% or less.
73 OH7FES Ari
Ok.
I think your radio has a hardware fault, but I will need to change the the firmware so that PWM is only used if users select dimming.
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 10:07 pm
by VK3KYY
KU4ZD wrote: ↑Sat Mar 07, 2020 1:48 pm
Ok well watch for your email with instructions
VK3KYY wrote: ↑Sat Mar 07, 2020 3:00 am
KU4ZD wrote: ↑Sat Mar 07, 2020 12:02 am
I tried up update, I downloaded the updated CPS and this firmware. After updating the firmware I have a message on my screen that says '`Flash Mem Error" with the radio on or off and I can not load anything or get rid of the error message nor do anything at this point? any ideas?
Mike
I think I know whats wrong.
Your radio probably had invalid calibration data, which would also explain why its never worked that well
I'll email you, so that you can backup your Flash memory and email it to me
Ken
You radio had an invalid byte in the calibration data header. I don't think it would have worked at all with the official firmware.
I've emailed you an updated flash backup file, which should fix this problem
Re: Update 6th March Version 2
Posted: Sat Mar 07, 2020 10:12 pm
by KU4ZD
Thank you, I have not seen it yet but will be watching for it. Thank
VK3KYY wrote: ↑Sat Mar 07, 2020 10:07 pm
KU4ZD wrote: ↑Sat Mar 07, 2020 1:48 pm
Ok well watch for your email with instructions
VK3KYY wrote: ↑Sat Mar 07, 2020 3:00 am
Mike
I think I know whats wrong.
Your radio probably had invalid calibration data, which would also explain why its never worked that well
I'll email you, so that you can backup your Flash memory and email it to me
Ken
You radio had an invalid byte in the calibration data header. I don't think it would have worked at all with the official firmware.
I've emailed you an updated flash backup file, which should fix this problem