Machine gun sound on UHF channel

[N9JIG]

I live in a golf course community and the golf club is licensed for a UHF repeater with NFM modulation (11K2F1D and 11K2F3E). While I have never heard them talk on it in the year I have lived here I often get a machine-gun sounding pulse for a couple seconds at a time here and there.

The license only generically states that they "WILL USE RADIOS TO BETTER COORDINATE OUR ACTIVITIES.". No indications of any type of sprinkler control or other digital use is indicated.

Any ideas whether the machine gun sounding stuff could be used for anything? Has anyone heard of a system like this that might be used for sprinkler control or other use?

 

[NDRADIONUT]

Could be dmr simplex...

 

[KevinC]

Yeah, I would lean toward DMR also.

 

[Voyager]

Is this pulse at fixed intervals? It could be a conventional DMR repeater.

Does DSD+ show anything?

 

[ScannerSK]

There are some data streams on various frequencies that sound like machine-gun noise. Typically, these are continuous transmissions. Possibly, if you searched from 406-420 and 450-470 you would find one of these frequencies that sounds identical to what you receive at times.

You may actually be receiving intermod every once in a while from one of these data transmissions mixing with another frequency and being received on the golf course frequency.

Shawn

 

[n1das]

Could be a DMR repeater in the area. It may be from another user in your listening area on the frequency the golf course is licensed for.

How is the signal strength of the received signal when you hear the machine gunning signal? Is it relatively strong / local or weak / distant? What you're hearing might not be originating from the golf course.

 

[SCPD]

Data

Seeing as the OP says the data burst only last for a couple of seconds, I'll guess there's some sort of non-voice data being sent from one part of the course to another. Curious if he's hearing the data burst in the middle of the night, when no one's around. Curious if he's hearing any voice on other frequencies. I'm assuming the course has to have some sort of voice comms going on during the day. The closest course to me is always chattering about things.

 

[N9JIG]

I have not heard any other voice on the freq. I was leaning against DMR voice because the the signal itself breaks squelch back and forth. I have heard NXDN and TRBO before on different freqs and they usually sound similar to P25 does on an analog scanner.

I appreciate the suggestions and will try to figure this thing out!

 

[DaveNF2G]

Sounds like a TRBO Idle signal.

 

[K5MPH]

Data Channel more than likely......

 

[KCoax]

Sound of raw DMR traffic

 

[DickH]

If I lived there, I would start by asking the people who run the golf course.

 

[N9JIG]

Sound of raw DMR traffic

Thanks! It does sound somewhat like this but with no variation like heard there.

I may have to venture into the Pro Shop and see if I can see any radios. I don't golf (so why do I live on a golf course?) but I suppose I can go and look at the shirts...

 

[ofd8001]

That or the maintenance/greenskeeper folks. Sometimes those in the pro shop are not very well versed in the details of course maintenance, assuming it is some type of maintenance equipment. Then again, depending on how "high faluting" the course is, it could be some type of back and forth between carts and the snack bar. (I'm finishing the front 9 and want a ham sandwich at the turn).

 

[Voyager]

Is this at fixed intervals, Rich?