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Data bursts 155.670

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rrbum

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Was wondering if anyone with a digital radio can identify the source of the data bursts which have recently appeared on 155.670 in the southeastern part of Pa.

Thanks.
 

soberbyker

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Every now and then I'll hear a PA State Police (Philadelphia or Media?) radio check on that frequency around shift starting time.
 

rrbum

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Every now and then I'll hear a PA State Police (Philadelphia or Media?) radio check on that frequency around shift starting time.
Hello Soberbyker, yes it is the "old" state police channel B base. It is still used by Phila, Avondale, and a few other barracks within range of my antenna.
The digital transmissions have started recently and are not exactly booming in. They are short one second or so bursts timed out evenly at about the same rate that a telephone rings, with longer transmissions occurring at random times.
Now I am wondering if anyone else can hear them also.
 

captclint

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The digital transmissions have started recently and are not exactly booming in. They are short one second or so bursts timed out evenly at about the same rate that a telephone rings, with longer transmissions occurring at random times.
Now I am wondering if anyone else can hear them also.
The same thing is happening on Ch D Troop F or G.. There is also analog repeater traffic from Montoursville PSP troop F & some troop G on 154.6650
 
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soberbyker

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Hello Soberbyker, yes it is the "old" state police channel B base. It is still used by Phila, Avondale, and a few other barracks within range of my antenna.
The digital transmissions have started recently and are not exactly booming in. They are short one second or so bursts timed out evenly at about the same rate that a telephone rings, with longer transmissions occurring at random times.
Now I am wondering if anyone else can hear them also.
Thanks, I was on my laptop when I responded and knew it was PSP just not which one as I didn't have my list in front of me and I'm in the middle of the two. I'll hear a couple of cars and the base each morning do the radio check and nothing else, no data bursts. I have been picking up some static, like a transmission on a channel too far away, on the car to car and tac channels too.
 

drmiller1

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ref: data busts

this may not be related, but 156.675 starting about 2 weeks ago stays in a state of static. squelch adjustment has no effect on it. this is in southern Delaware.
 

rrbum

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Forgive me for resurrecting this thread, but I have been trying to ID this station and still am unable to nail it down.
I have gathered more information since original post. These transmissions are DMR with negative polarity, color code 13, sometimes encrypted but mostly not.
The signals are too weak for me to decode voice but the aforementioned information does appear when using DMR decode as well as DSD+.

Can anyone else copy this signal in the southeast Pennsylvania area?


Maybe someone with a better antenna running a tapped scanner and appropriate software can get a good copy and provide more information on this rogue signal.
 

wildbillx

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155.670 is Stone Harbor, NJ Pd- Mototrbo cc 13 slot 2 with Privacy
155.670 is Avalon, NJ Pd- Mototrbo cc 11 slot 1 with Privacy
 

The_B_Chief

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The PSP helicopters used to transmit what would sound a lot like MODAT over their VHF channels. Not sure if that's the same thing you are hearing. I was told that it was some sort of transponder.
 

rrbum

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Thanks for that, but, wildbillx nailed it. It is the towns along the Jersey shore. I never researched them further than the FCC emissions designators. Once I saw they were not digital but telephony. (which seem to be not proper for dmr)
 
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