Cap+ System on 152.9075

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garys
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Cap+ System on 152.9075

#1 Post by garys » 09 Aug 2017 15:21

Found this today. Shows Rest Channel as 3 on the above frequency. CC is 3. No licenses listed in the FCC database anywhere in the country for that frequency. Signal strength using Airspy and DSD+ is fairly strong. There has been some activity, but it's been exclusively Private Call.

I'll add more when I have more information.
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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Scott
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#2 Post by Scott » 09 Aug 2017 15:43

Not seeing it down here, if that helps. And the antenna I'm on at work would if it could. :-)
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Scott
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#3 Post by Scott » 09 Aug 2017 15:48

Here's a trunked system that has 152.9075 s one of the frequencies, which would better match the bandplan in that frequency range.

http://wireless2.fcc.gov/UlsApp/UlsSear ... ey=3539717
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garys
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#4 Post by garys » 09 Aug 2017 16:31

Thanks, Scott. That makes more sense. I edited the DSD information and dialed up 152.9075 using FMPA. It's right on frequency and the data is the same. That list gives me something to work with if the system is busy enough. Sometimes the FCC data makes me wonder. One transmitter site is on the John Hancock Building. I searched using the lat/long in the FCC file and it put me in Braintree on the side of a reservoir. There are two Rosemont Streets in Boston, neither of which match the lat/long in the FCC file.

I've seen that fairly consistently as I've hunted down various trunk frequencies. I have no idea what, if anything it means. For our purposes, I'll go with the transmitter being on the Hancock Tower.

It's also interesting that the system uses ARS. I've read bit about it, but I don't know how to set that up in DSD+. Time to do some more research, I guess.

Thanks again.



Scott SNE Webmaster wrote:Here's a trunked system that has 152.9075 s one of the frequencies, which would better match the bandplan in that frequency range.

http://wireless2.fcc.gov/UlsApp/UlsSear ... ey=3539717
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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garys
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#5 Post by garys » 09 Aug 2017 22:41

This is a bit odd. 151.9025 is showing up as a Rest Channel. What's odd is that 151.9175 is also showing up as a Rest Channel at the same time. It seems that there are two Cap+ systems operating at the same site. More investigation is needed before I do another Wiki update for this system.
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#6 Post by ecps92 » 10 Aug 2017 07:09

Both Lat/Lon from the FCC put it right on Spot. I would double check your GPS Program

Google Earth puts 42-20-57.3 N, 071-04-30.2 W right on-top of the Hancock Bldg.
Google Earth puts 42-23-55.7 N, 071-14-24.3 W in Middlesex County - Rosemont Ave - Waltham [Same site as Fallon EMS]
garys wrote:Thanks, Scott. That makes more sense. I edited the DSD information and dialed up 152.9075 using FMPA. It's right on frequency and the data is the same. That list gives me something to work with if the system is busy enough. Sometimes the FCC data makes me wonder. One transmitter site is on the John Hancock Building. I searched using the lat/long in the FCC file and it put me in Braintree on the side of a reservoir. There are two Rosemont Streets in Boston, neither of which match the lat/long in the FCC file.

I've seen that fairly consistently as I've hunted down various trunk frequencies. I have no idea what, if anything it means. For our purposes, I'll go with the transmitter being on the Hancock Tower.

It's also interesting that the system uses ARS. I've read bit about it, but I don't know how to set that up in DSD+. Time to do some more research, I guess.

Thanks again.
Bill Dunn N1KUG
Cruise Ship Frequencies
http://scanmaritime.com

"The tougher it is to find a frequency, the more it makes me want to work to find it. - I've learned to use the SEARCH Button"

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garys
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#7 Post by garys » 10 Aug 2017 07:25

I'm using Google Maps, so I'm probably putting the info in incorrectly.

Actually, looking at it now, Google Maps shows different Lat/Long than you post, and I don't know why. I'll look at that later.

I'm still trying to figure out the LCN and OTA sequences.
ecps92 wrote:Both Lat/Lon from the FCC put it right on Spot. I would double check your GPS Program

Google Earth puts 42-20-57.3 N, 071-04-30.2 W right on-top of the Hancock Bldg.
Google Earth puts 42-23-55.7 N, 071-14-24.3 W in Middlesex County - Rosemont Ave - Waltham [Same site as Fallon EMS]
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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garys
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#8 Post by garys » 10 Aug 2017 18:35

This is an odd system, to say the least.

The LCN and frequencies are as follows,

1 151.9175
2 152.9075
3 151.8425
4 151.5725
5 151.6777
6 151.9025

What's odd is that LCN 1 appears to operate as a separate sub system, not part of the regular Cap+ system. Most of the ARS data and many Private Calls operate here. The rest channel alternates between Slot 1 and Slot 2, but never moves to any other channel in the system.

LCN 3-6 appear to operate as a normal Cap+ system. The rest channel rotates through all frequencies as needed, there is some, but not a lot of ARS, and a lot of Private Call activity. So far the only TGs observed are 130 and 1-91, 1-93, and 1-94.

I have to watch this system some more before I edit the Wiki page.
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.


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#10 Post by garys » 11 Aug 2017 12:31

Yeah. The filing was interesting, but not tremendously informative. The frequency ID in the FCC data coincides with the LCN order. The system was active this morning, but of course I had to go out and won't be back until later this afternoon. What I observed this morning gives further confirmation to the LCN and OTA information.


ScanBoston wrote:http://wireless2.fcc.gov/UlsApp/UlsSear ... ey=3539717

Ooops I see you alrready have this. Nevermind
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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#11 Post by garys » 16 Aug 2017 12:36

From listening for a few days, I'm pretty sure that this is the school bus vendor for Boston Public Schools. Most of the traffic seems to be vans and small buses transporting special needs students. It will be interesting to see how busy the system gets after school is back in.
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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