New GD77 and MD9600 Beta firmware June 19th 2022

W8LDO
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by W8LDO » Thu Jul 14, 2022 6:02 pm

Is it normal hearing the opposite time slot you are scanning in scan mode? Most people would refer this to bleed over. Does this have anything to do with the scan speed. Would slowing the scan fix this? Experiencing this on both of my TYT md-9600's

W8LDO

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F1RMB
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by F1RMB » Thu Jul 14, 2022 6:19 pm

If the timeslot filter is OFF, yes, it's normal


Cheers.
---
Daniel

W8LDO
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by W8LDO » Thu Jul 14, 2022 7:45 pm

F1RMB wrote:
Thu Jul 14, 2022 6:19 pm
If the timeslot filter is OFF, yes, it's normal


Cheers.
---
Daniel
The Time slot filter is on. It don't do it as soon as it starts just does it eventually. Its like it resets if i stop scan and start again, and then after a few minutes I can once again start to hear the opposite time slot. Very garbly sound if there is such a word.

VK3KYY
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by VK3KYY » Thu Jul 14, 2022 9:05 pm

Are you listening to sham radio signal?
What is its signal strength?
Doi you have any local QRM?

W8LDO
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by W8LDO » Fri Jul 15, 2022 3:00 am

VK3KYY wrote:
Thu Jul 14, 2022 9:05 pm
Are you listening to sham radio signal?
What is its signal strength?
Doi you have any local QRM?
If you are referring to my last post, the answer is no. it is the same audio from the opposite time slot. I push star button on the microphone, I can hear it clearer. pusth the button again, to go back to the original time slot, and it is quiet like it is supposed to be. It does it on both TYT dm-9600's. One is a version 2 and the other a version 5.

VK3KYY
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by VK3KYY » Fri Jul 15, 2022 3:22 am

linkford wrote:
Fri Jul 15, 2022 3:00 am
VK3KYY wrote:
Thu Jul 14, 2022 9:05 pm
Are you listening to sham radio signal?
What is its signal strength?
Doi you have any local QRM?
If you are referring to my last post, the answer is no. it is the same audio from the opposite time slot. I push star button on the microphone, I can hear it clearer. pusth the button again, to go back to the original time slot, and it is quiet like it is supposed to be. It does it on both TYT dm-9600's. One is a version 2 and the other a version 5.
If its an unknown signal then it could contain various bits of data which would potentially screw up the timeslot detection system.

W8LDO
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by W8LDO » Sat Jul 16, 2022 3:51 am

VK3KYY wrote:
Fri Jul 15, 2022 3:22 am
linkford wrote:
Fri Jul 15, 2022 3:00 am
VK3KYY wrote:
Thu Jul 14, 2022 9:05 pm
Are you listening to sham radio signal?
What is its signal strength?
Doi you have any local QRM?
If you are referring to my last post, the answer is no. it is the same audio from the opposite time slot. I push star button on the microphone, I can hear it clearer. pusth the button again, to go back to the original time slot, and it is quiet like it is supposed to be. It does it on both TYT dm-9600's. One is a version 2 and the other a version 5.
If its an unknown signal then it could contain various bits of data which would potentially screw up the timeslot detection system.
The incoming signal is from various repeaters that I am experiencing this on.

W8LDO
Posts: 52
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by W8LDO » Sun Jul 17, 2022 3:53 pm

linkford wrote:
Sat Jul 16, 2022 3:51 am
VK3KYY wrote:
Fri Jul 15, 2022 3:22 am
linkford wrote:
Fri Jul 15, 2022 3:00 am


If you are referring to my last post, the answer is no. it is the same audio from the opposite time slot. I push star button on the microphone, I can hear it clearer. pusth the button again, to go back to the original time slot, and it is quiet like it is supposed to be. It does it on both TYT dm-9600's. One is a version 2 and the other a version 5.
If its an unknown signal then it could contain various bits of data which would potentially screw up the timeslot detection system.
The incoming signal is from various repeaters that I am experiencing this on, and only happens while scanning.

S58SMS
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by S58SMS » Mon Jul 18, 2022 8:11 am

Same here

G4EML
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Re: New GD77 and MD9600 Beta firmware June 19th 2022

Post by G4EML » Mon Jul 18, 2022 9:49 am

From your description it sounds like the timeslot detection is occasionally failing. It does not seem to be a common occurrence and so the cause might be difficult to find. It may depend upon the number of a DMR channels being scanned, the amount of activity on the scanned channels, the order of the channels.

You say it only happens when scanning but that may be because scanning puts a heavy load on the radio. As you suggested you could try lowering the scanning speed.

Until we can come up with a repeatable scenario it will be difficult to fault find.

Maybe you can continue to do some testing. Try creating a new zone and only including a few repeaters with high activity, then scan that zone to see if the problem occurs. Then possibly change the channels to ones that have less activity. Any clues as to what may be causing your problem would be helpful.

Colin G4EML

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