Picking Up MPT-1327 Control like Channel

enosjones · #1 (**permalink**) 09-26-2010, 05:55 AM

Here In Price My Scanner Has been Picking Up This noise on 152.090 so i Decieded to decode it what i found is that it was a MPT1327 Control Channel but no License info and the decoder I was using Said the Control Channel was on 420.000 which is the beginning of the Ham Band and i Knew it wasnt there cuz the Frequency was Definitely in VHF 152.090. Any Ideas Here? The Site ID is 4A89 I think. With PL of 165.5.

kd7rto · #2 (**permalink**) 09-27-2010, 01:08 AM

What decoder are you using, and what LCN does it show the control channel as?

Gezelle007 · #3 (**permalink**) 09-27-2010, 01:24 AM

Quote:

Originally Posted by kd7rto

What decoder are you using, and what LCN does it show the control channel as?

Im guessing he was using "Trunkview" that program doesnt tell you what frequencies the system is on. You have to manually set all that up. And Unless you connect it via serial to your scanner it wont do much. Youll only be able to decode control channel data. So it gives you the site ID and the Passcode for that site, but thats it. The 420.0 frequency is a default.

enosjones · #4 (**permalink**) 09-27-2010, 08:14 PM

4A89 740B AAAA C4D7
01001010 10001001 01110100 00001011 10101010 10101010 11000100 11010111
19:09:20 - CCSC | Control Channel System Codeword| SYS Id: 4A89

8000 0401 B80A 949C
10000000 00000000 00000100 00000001 10111000 00001010 10010100 10011100
19:09:20 - ALH | General single codeword | (000) Id: 0 Wt: 7 Rsvd: 0 M: 0 N: 10

4A89 740B AAAA C4D7
01001010 10001001 01110100 00001011 10101010 10101010 11000100 11010111
19:09:20 - CCSC | Control Channel System Codeword| SYS Id: 4A89

8A54 4C72 0409 F6EE
10001010 01010100 01001100 01110010 00000100 00001001 11110110 11101110
19:09:21 - BCAST| Call maintenance parameters | SYS: 4A89 Per: No Ival: 0 Pon: Yes

4A89 740B AAAA C4D7
01001010 10001001 01110100 00001011 10101010 10101010 11000100 11010111
19:09:21 - CCSC | Control Channel System Codeword| SYS Id: 4A89

8000 0401 B800 F531
10000000 00000000 00000100 00000001 10111000 00000000 11110101 00110001
19:09:21 - ALH | General single codeword | (000) Id: 0 Wt: 7 Rsvd: 0 M: 0 N: 0

4A89 740B AAAA C4D7
01001010 10001001 01110100 00001011 10101010 10101010 11000100 11010111
19:09:21 - CCSC | Control Channel System Codeword| SYS Id: 4A89

8E54 4C70 1000 E4C9
10001110 01010100 01001100 01110000 00010000 00000000 11100100 11001001
19:09:21 - BCAST| Registration parameters | SYS: 4A89 Spare: 0x1000

enosjones · #5 (**permalink**) 09-27-2010, 08:15 PM

NO LCN no Affiliation sites no band channel fleet patch or any other info

Gezelle007 · #6 (**permalink**) 09-27-2010, 08:26 PM

Thats weird, thats nothing like what I see on my Trunkview.

This is what it normally looks like for me.

enosjones · #7 (**permalink**) 09-27-2010, 08:37 PM

it looks close just more spaced out

enosjones · #8 (**permalink**) 09-27-2010, 08:39 PM

I have it showing all msgs where ur filter might not be showing as many

citylink_uk · #9 (**permalink**) 09-29-2010, 04:21 AM

If you go to Filter > User in the top menu, de-select CCSC, ALH and 'BCAST - Call Maintenance parameters' and you will only be left with the stuff that's worth looking at.

As others have said, you will need the serial lead from your scanner to the PC to start tracking voice channels. Trunkview will also record voice conversations too, which means that you can leave it running for a few days and not miss anything.

MPT1327 is big where I'm located, so if you need any help setting up Trunkview, just shout.

enosjones · #10 (**permalink**) 10-01-2010, 09:38 PM

Im not sure who uses it and its not in the fcc list. it is 100 percent signal from my house. but no idea who owns it

enosjones · #11 (**permalink**) 11-05-2011, 12:24 PM

If anyone Has more info on This let me know. To update i have found within the 152mhz 4 or 5 channels that id and have voice traffic and as well as another possible MPT1327 Control Channel on 161.800 and a weaker one on 161.925. im not sure of those are clones images or mirror of the 152.090 or visa versa.. 152.660 152.750 152.825 152.180 0r 152.185 all voice and switch and then id after the transmission is complete. no fcc licenses on or near these frequencies. i need to confirm the so called data control channel to see if it is mpt1327 or something else the program i have says its mpt1327. but im just not sure...any help would be great..

Gezelle007 · #12 (**permalink**) 11-05-2011, 01:11 PM

Quote:

Originally Posted by enosjones

If anyone Has more info on This let me know. To update i have found within the 152mhz 4 or 5 channels that id and have voice traffic and as well as another possible MPT1327 Control Channel on 161.800 and a weaker one on 161.925. im not sure of those are clones images or mirror of the 152.090 or visa versa.. 152.660 152.750 152.825 152.180 0r 152.185 all voice and switch and then id after the transmission is complete. no fcc licenses on or near these frequencies. i need to confirm the so called data control channel to see if it is mpt1327 or something else the program i have says its mpt1327. but im just not sure...any help would be great..

When I first started scanning the system that is in my area, I kept seeing a bunch of control channels on different frequencies because I was so close to the tower. It sounds like your 161.8 and 161.925 may be the same channel. If you are close enough, whatever transmitter you are picking up may be overwhelming your scanner. If Trunkview decodes both with the same site ID, then its the same transmitter.

Looking through the Carbon County FCC Database, there are several licenses in the 152MHz frequency range you gave. FCC Licenses and Scanner Frequencies for Carbon County, Utah (UT) (Make sure you turn on the Business Conventional and Business Trunked sections to see those frequencies.)

enosjones · #13 (**permalink**) 11-05-2011, 01:27 PM

none of them match all the way... especailly 152.090

enosjones · #14 (**permalink**) 11-13-2011, 02:04 PM

Furthur info on this im possibly getting Voice Channels on 152.660, 152.750, 152.180, 152.825 after they talk it sounds like a digital burst for a sec like 152.090 then id's.. cwget says partial id liscence is pxn930 but nothing on fcc matches even 930 let alone the rest of it....

Gezelle007 · #15 (**permalink**) 11-13-2011, 02:21 PM

That burst at the end of each transmission is MP7 data- basically a unit ID burst similar to MDC1200 or Fleetsync data.

On some 1327 systems there is a much longer burst right before the channel "closes" that sounds like control channel data, that is the controller telling all the radios which control channel to switch to.

Gezelle007 · #16 (**permalink**) 11-13-2011, 02:24 PM

Does that burst sound like anything I have attached?

enosjones · #17 (**permalink**) 11-13-2011, 02:25 PM

ok but no scanners can track this yet mine seems to be the longer one i have 3 controller channels im not sure is they are clones or acctual ones. anyway they dont seem to be lisenced through fcc oor not liscenced through the county

enosjones · #18 (**permalink**) 11-13-2011, 02:29 PM

nope much longer than the long one

Gezelle007 · #19 (**permalink**) 11-13-2011, 02:33 PM

Quote:

Originally Posted by enosjones

nope much longer than the long one

Then its just the clear-down data. Its just telling the radios what to do. And if you can't find it through the FCC, then it just hasn't been licensed yet.. or its something Federal, and Federal licenses go through the NTIA, and they don't openly display license info.

enosjones · #20 (**permalink**) 11-17-2011, 12:57 AM

This Site I Have Unitrunker Decoding To See If I can Get Anything.... There is another one with a slightly different site id...