DMR packet burst

[pyro424]

Its my first time scanning DMR. I am using a 436. I programmed in the frequency and left the audio type to All. It is just a small fire department so it is only one frequency. However every minute or so the repeater sends out a packet burst. It happens 24/7 even when there is no one transmitting, So when i am scanning it will always stop on that frequency every so often. My question is, is this normal. Is that just what you have to live with when monitoring a DMR channel? Or is there something I am missing here.

Thanks

 

[jonwienke]

Program the FD as a DMR One Frequency system instead of conventional.

 

[INDY72]

Set it up as an DMR One Frequency Trunk, with ID Search on. You will then see the Color Code, Talk Groups, and the Timing Slots being used, without any locking up on packet bursts, which shows this is most likely an IP Site Connect, DMR Conventional system.

Internet Protocol Site Connect (DMR) still conventional, but uses the Internet to extend system coverage. Up to 15 low traffic sites with up to 200 users per site. Operates exactly like Repeated Conventional except that there is a 2-second burst that is transmitted every 30 seconds. (This interval can be set for as low as 12 to 15 seconds, or up to a minute by the system administrators. It includes status updates from all radios on the system, as well as can include GPS location for units etc...)

 

[pyro424]

ok thanks. does this mean i have to put make a channel and put in a TGID? or do i omit that part

 

[UPMan]

In ID Search, it will stop on all TGIDs. If you program TGIDs into channels, then you can run in ID Scan mode and it will only stop on those channels you've programmed.

 

[pyro424]

ok great thanks. the one other question i have is. if i end up programming in say the dispatch talk group. if then someone made a private radio to radio call. (not sure what thats called). i am guessing i would miss out on that. but now if it was in id search mode, would i still miss out on it or would i hear it?

 

[werinshades]

ok great thanks. the one other question i have is. if i end up programming in say the dispatch talk group. if then someone made a private radio to radio call. (not sure what thats called). i am guessing i would miss out on that. but now if it was in id search mode, would i still miss out on it or would i hear it?

In ID Scan Mode, put in Talk group i0 (small i, number 0) and name it Private Call or something else if you prefer.

 

[pyro424]

ok thanks. so that will allow me to pick up on the private calls. sounds good.

 

[jonwienke]

In ID Scan Mode, put in Talk group i0 (small i, number 0) and name it Private Call or something else if you prefer.

If you set ID SEARCH mode for the System, this is not necessary to pick up private calls. You will also find new talkgroups not listed in the scanner programming.

 

[werinshades]

ok thanks. so that will allow me to pick up on the private calls. sounds good.

If you set ID SEARCH mode for the System, this is not necessary to pick up private calls. You will also find new talkgroups not listed in the scanner programming.

Either method will work. It's all user preference. If you know the department only uses 2 channels on the system, then you could program the known talk groups, text tag them, add i0 as a Private call (or whatever you prefer to call it), put it in ID Scan mode and you're set.

However as jonwienke says, if you're still unsure, let it fly in ID Search Mode. You can still program as I mentioned above, and the scanner will stop on your programmed talk groups but find unknown talk groups.

When I program any DMR system talk groups, I select "Any" when it asks you for a slot number. This way if Talk group 1, stops transmitting and talk group 2 takes the slot, the scanner will track talk group 1 to the next slot. This has worked for me very well. Good luck, have fun...