Stopping on DMR channels with no voice

[adsbgreenock]

Hi Guys,

I've had a look around and although I think I understand other posts regarding delay in the sds200e model, Im not sure if my situation is covered.

I do a scan of various favourite lists and systems downloaded from RRUK.

The scanner will stop on a channel that displays for example DMRT3, both slot 1 and slot 2 it will fluctuate between, same with CAP+ . I have a few systems like this some are data but have voice as well.

The problem I have is that the scanner stops on these frequencies while silent and no voice is present at the time.

Im sorry if I'm not explaining this properly but basically im wondering if I can program the scanner to only stop when it hears actual voice comms and not the data or dead carrier?

I am missing quite a lot of activity due to this and often find the scanner sitting on one frequency for 20 mins a time.


Any help is appreciated as always
Thanks in advance

Regards

 

[KevinC]

More than likely it’s the control channel.

 

[werinshades]

Programmed as a MotoTRBO Trunking system, or are they programmed conventionally?

 

[adsbgreenock]

Programmed as a MotoTRBO Trunking system, or are they programmed conventionally?

Hi thanks for your time. Mototrbo systems, even some of my quick saves are doing the same.
I think they maybe control channels as the other user said. But I don't know if there is a way to stop the scanner sticking on the channel when no voice activity is heard? Without temp or permanently avoiding.

Regards

 

[werinshades]

Hi thanks for your time. Mototrbo systems, even some of my quick saves are doing the same.
I think they maybe control channels as the other user said. But I don't know if there is a way to stop the scanner sticking on the channel when no voice activity is heard? Without temp or permanently avoiding.

Regards

If it's programmed correctly, it won't do this. Similar to listening to a P25 in conventional mode, it will stop on the control channel. You're seeing a MotoTRBO rest channel while in Custom Search or Conventional scanning.

 

[mikewazowski]

Chances are it’s because Uniden botched their implementation of DMR and any DMR channel programmed as conventional, operates like it’s in carrier squelch mode.
That means your scanner will stop on any signal it finds including AVL or other data.
If they had used the slot and group information in the database, you probably wouldn’t have this problem.
To get around it, you must program conventional DMR systems as One Frequency Trunk systems. Unfortunately Uniden didn’t see fit to convert all the conventional channels to OFT systems in Sentinel so when your travelling into another area, your scanner will hang up on these conventional channels with data or you’ll have to listen to every user on the frequency.

 

[ka3jjz]

If you wish to read up on the DMR Conventional vs. OFT, I have several threads on the subject linked here

DMR and MOTOTRBO Tips for the BCDx36HP and SDS Scanners - The RadioReference Wiki

wiki.radioreference.com

Mike

 

[Ubbe]

The scanner will stop on a channel that displays for example DMRT3, both slot 1 and slot 2 it will fluctuate between, same with CAP+ .

It could be that the LCN are incorrect. You could either run DSDplus to see what the LSN are and convert to LCN or run the LCN finder in the scanner.

If the LCN are incorrect it will get the LCN info on the control channel slot and then tune the scanner to the frequency for the LCN you have programmed. If LCN and frequency doesn't match then it will go back to the control channel and it starts all over again, jumping between slots.

I believe there are a known bug where the scanner stays on a data channel, for AVL or similar, and get stuck there. But don't know if that could be your problem.

/Ubbe

 

[adsbgreenock]

Hello Ubbe and all

Thanks for the replies , I don't really know too much about these systems .

I entered my postcode into RRUK and downloaded "DMR" systems . I guess it works similar to this site .

A lot of the frequencies are labelled or tagged in the proper manner (System,Department,Channel) but most of the name tags are for users outwith with my area .However the actual frequencies (channels)themselves are active (I've just left the names unchanged as I know what most are ).Could this be the problem?

To counter this I started from scratch by scrubbimg all of these named systems , departments , channels leaving the scanner on and using proscan to build up a log .(wouldnt it be great to transfer the history log.txt straight to an hpe )

I then copied just the frequencies over from the history log.txt to sentinel , Added them to a favouties list and sent it to the scanner after setting audio type and digital search for each one.

It now seems worse off than it were and I can't use the LCN finder in the scanner because Ive not tagged or labelled any system,departments just put them in quick save .

I'm just starting out here and slowly grasping the layout . So I should use my rsp1a and DSD fastlane to grab LCN is probably the best bet ?

Thanks for your time and apologies for my long windedness

Regards

Rab

 

[ProScan]

wouldnt it be great to transfer the history log.txt straight to an hpe

See if this will work. "Click the Copy / Move Selected Rows To Database..." button located in the History Logging tab. Choose Database then Copy then follow the prompts. After that, go to the Favorites Editor window then click the "Export / Print" menu then click the "Sentinel HPE File" button.

 

[Ubbe]

then click the "Export / Print" menu then click the "Sentinel HPE File" button.

Wouldn't that create just conventional DMR frequencies of the T3 and Cap+ systems that he has problem with, and then having no TG name tagging capabilities? He would certainly hear the conversations if they stayed on the same frequency and slot if all frequencies where programmed as conventional and could be a good start to see that reception of the systems are fine.

/Ubbe

 

[ProScan]

Wouldn't that create just conventional DMR frequencies of the T3 and Cap+ systems that he has problem with, and then having no TG name tagging capabilities? He would certainly hear the conversations if they stayed on the same frequency and slot if all frequencies where programmed as conventional and could be a good start to see that reception of the systems are fine.

/Ubbe

Negative. Choose MotoTRBO when prompted to enter the system type.

 

[adsbgreenock]

Negative. Choose MotoTRBO when prompted to enter the system type.

OK this seems to be working , and working way better than the way i originally had it (my lists were like a bowl of spaghetti )

After copying selected rows to database and selecting Mototrbo as the system type .
I tested this for around twenty minutes earlier I don't seem to be getting hung up on the same control channels as much.

The radio during scan will stop now and again but i think these are data channels and safe to avoid.

For the more part the scan mostly now stops on voice comms. Activity is minimal just now (12:44am) I will see the difference more later today i guess when there is more traffic .General scanning also appears to be faster.
For me there is a bit of a learning curve with these menu settings and the software side of things after moving over from a USC230 /TRX1E.

Thanks Proscan /Ubbe

Regards