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Issues with DMR Public Safety

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I just got the TYT MD 380 for scanning my local public safety DMR. It is no trunked or encrypted. I currently scan with DSD and SDR and it works perfectly. I got the MD 380 (VHF) so I could have something on the go. with the MD 380 software I have gotten the CC in of 14 per the radio reference website and I have that in "CC" then for the TG I have "1096" and have that in Contact Name in the program. everything else is set to None for the settings. They use slot 1 which I also have in. When they talk on DSD+ it decodes perfectly but I just see the green LED on the TYT 380 no audio ever! I have tried messing with the settings etc but nothing seems to work!
 

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jonwienke

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You need to put the contact in a group list, then put that group list in the channel settings.

Contact specifies who you talk to (not applicable here) group list specifies who you will listen to.

You've told the radio you don't want to listen to anybody.
 
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Still does not work... I added the TG of "1096" to a group list then changed the Group List on the channel settings to 1096 is the Group list I want to listen to. Anything else that could be messing with it?
 

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jonwienke

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Also, check talkgroup ID for possible decimal / hexadecimal confusion somewhere.
 

bharvey2

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I've never used my MD380 to monitor commercial or PS traffic but two things come to mind:

When you set up the talk group IDs did you list them under "Group Call", "Private Call" or "All Call"? I'd think it should be "Group Call".

Also, I noticed at the bottom of your screen capture that it says RAS. I'm not sure how radios incapable of handling RAS behave when monitoring RAS enabled systems so maybe this is the issue. Perhaps someone with experience with RAS enabled systems can weigh in.
 

mm

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Trunked, trunked, trunked, trunked, trunked, trunked, trunked

not trucked, not trucked, not trucked, not trucked, not trucked.

Sorry I just found out today that my ancestors are from Normay not Norway and now I have to change the spelling on all of my coffee cups and such.
 

W2SJW

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No radio outside of a Motorola unit properly programmed with the RAS key will decode this channel at all. An actual DMR radio cannot tell that the data contains voice traffic.

RAS alters a status bit in the frame headers that basically 'invalidates' the data stream as voice (it corrupts the checksum). DSD+ knows that specific frame header & ignores it for decoding purposes (and also shows you it's there).

Uniden scanner have maybe a 90% success rate trying to decode RAS-protected audio via scanning by talkgroup (Whistler units are close to 98%).
 

bharvey2

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No radio outside of a Motorola unit properly programmed with the RAS key will decode this channel at all. An actual DMR radio cannot tell that the data contains voice traffic.

RAS alters a status bit in the frame headers that basically 'invalidates' the data stream as voice (it corrupts the checksum). DSD+ knows that specific frame header & ignores it for decoding purposes (and also shows you it's there).

Uniden scanner have maybe a 90% success rate trying to decode RAS-protected audio via scanning by talkgroup (Whistler units are close to 98%).

Scott, though I'm not the OP, thanks for the clarification on how RAS works. I figured it was something akin to what you described. (I as actually thinking it might be an additional bit or byte added somewhere in the data string that messed things up for the none RAS radios) Now I know. Thanks again for the clear description.
 

W2SJW

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Hytera has something similar, but if DSD+ is showing the 'RAS' tag at the bottom, it's a Motorola system.
 
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