Portland Public Safety 700 MHz P25

[jeb2942]

I've been running OP25 on West Simulcast this morning but haven't seen it yet...


====== NAC 0x3c0 ====== PPS ======
rf: syid 3cc rfid 1 stid 21 frequency 772.606250 uplink 802.606250
net: syid 3cc wacn bee00 frequency 772.606250
secondary control channel(s): 773.131250,852.662500,854.462500
stats: tsbks 63410 crc 0

voice frequency 771.131250 tgid(s) 283 None 49.7s ago count 369
voice frequency 852.100000 tgid(s) 1633 None 1.7s ago count 3111
voice frequency 852.387500 tgid(s) 1687 None 219.9s ago count 266
voice frequency 853.637500 tgid(s) 1809 None 93.8s ago count 282
voice frequency 856.737500 tgid(s) 1687 None 69.0s ago count 200
voice frequency 856.887500 tgid(s) 1301 None 62.1s ago count 225
voice frequency 857.062500 tgid(s) 331 None 51.9s ago count 282
voice frequency 857.912500 tgid(s) 1687 None 47.5s ago count 328
voice frequency 858.062500 tgid(s) 331 None 61.2s ago count 278
voice frequency 858.787500 tgid(s) 467 None 31.0s ago count 282
voice frequency 859.062500 tgid(s) 283 None 10.4s ago count 256
voice frequency 859.837500 tgid(s) 331 None 47.6s ago count 259
voice frequency 860.862500 tgid(s) 669 None 21.4s ago count 49

tbl-id: 0 frequency: 851.006250 step 0.006250 offset -45.000000
tbl-id: 1 frequency: 762.006250 step 0.006250 offset 30.000000
tbl-id: 2 frequency: 851.012500 step 0.012500 offset -45.000000
tbl-id: 3 frequency: 762.006250 step 0.012500 offset 30.000000
adjacent 773.481250: rfid: 1 stid:23 uplink:803.481250 tbl:1
adjacent 853.462500: rfid: 1 stid:25 uplink:808.462500 tbl:0
adjacent 853.825000: rfid: 1 stid:27 uplink:808.825000 tbl:0
adjacent 852.287500: rfid: 1 stid:26 uplink:807.287500 tbl:0
adjacent 853.350000: rfid: 1 stid:24 uplink:808.350000 tbl:0
adjacent 770.856250: rfid: 1 stid:22 uplink:800.856250 tbl:1

 

[jeb2942]

I just used Unitrunker to monitor the West Simulcast system and it's showing up there

First 13:21:53 Last 13:22:04
Site 001-021
LCN 00-1069
Frequency 857.68750
Hits 0

 

[sparklehorse]

How well does OP25 decode West Simulcast? I've thought about trying OP25, but I have no Linux experience. I've had some success with SDR on Windows, but not sure I want to go down the Linux rabbit hole. The learning curve looks steep, to say the least. I can trunk track West Simulcast OK using Unitrunker and DSD+, but the decode is not that great. I'm hoping they'll eventually develop a Windows version of OP25, but who knows when or if that will ever happen? Maybe I should just get a Linux for Dummies book.

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[jeb2942]

OP25 works great although I have no issues with either Unitrunker or DSD+. OP25 only requires one SDR for both voice/control channel. I just followed Dark-Sky's post #764 in Software Defined Radio>VirtualBox Project - Run OP25 pm Windows 7. I installed it on a spare computer rather than a VirtualBox. May have to try that sometime.

 

[sparklehorse]

I live in sort of a hole in the West Hills. There's a hill between my home and Council Crest, and another that interferes with Mt Scott. I've always had poor reception of the simulcast Portland systems here, despite using various Yagis in different directions, attenuation, etc. I think that's my issue with DSD+, I'm just not getting a quality signal to it with Unitrunker. I can get an OK decode monitoring a single West Simulcast frequency, like 852.100, if I use SDR# to feed signal to DSD+. But SDR# has tuning controls, like Bandwidth and Order, that help me get the signal tweaked. Unitrunker seems to lack these fine controls, so I think that's my problem. I've messed with the various UT Gain controls, but nothing helped much. I've carefully determined the PPM corrections for my RTL-SDR dongles, so I know that's not the issue. Also tried different levels in VB Cable. Next step is to try to get the Unitrunker plugin for SDR# to work so I can send a better signal to DSD+ 1.101. I'm not keen on using FMP.

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[KE7JFF]

So I finally got unitrunker/dsd plus running with my Thumbnet N3 SDR which is an improved version of the RTL sticks. Its parked on the new system, west simulcast which booms here in North Portland.

 

[sparklehorse]

So I finally got unitrunker/dsd plus running with my Thumbnet N3 SDR which is an improved version of the RTL sticks. Its parked on the new system, west simulcast which booms here in North Portland.

Which version of DSD+? I couldn't get Unitrunker to play nice with DSD+ 1.101. It did work with an older version (1.074), but that version doesn't decode as well. The optimize PSK command worked pretty well for me with 1.101 just monitoring 852.1 as a conventional channel, but so far I've not been able to trunk track using 1.101. I know I could trunk track using FMP as the tuner, but FMP doesn't interest me. I tried using the Unitrunker plugin for SDR#, hoping I could send the voice signals to DSD+ from SDR#, but I haven't gotten that to work. I think that plugin hasn't been updated for a while.

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[KE7JFF]

I've been only tracking the trunk channel on Portland, but I have been using the latest DSDPlus on TriMet and the state radio system OK.


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[sparklehorse]

I've been only tracking the trunk channel on Portland, but I have been using the latest DSDPlus on TriMet and the state radio system OK.


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Does the latest release of DSD+ support P25 Phase II? I've only heard Phase II talkgroups on Ore State Radio Project. Maybe there's some Phase I mixed in there I hadn't noticed.

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[KE7JFF]

Does the latest release of DSD+ support P25 Phase II? I've only heard Phase II talkgroups on Ore State Radio Project. Maybe there's some Phase I mixed in there I hadn't noticed.



.

Not yet....but there is some FDMA traffic once in a while. I'm probably going to fire up OP25 to decode it soon.





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[bears3312]

portland p25

when will system fully go fulltime
thanks bears3312

 

[bears3312]

when will system fully go fulltime
thanks bears3312

if cresa911 p25 going to be encrepted are u guys going to encrepted to ?
thanks bears3312

 

[PaulNDaOC]

From a very reliable source I am being told dispatch frequencies should remain available in analog for up to the next five years to accommodate outside agencies that have not upgraded to P25-phase 2.

The same source informed me that the protests last week celebrating the Trump inauguration were handled on an encrypted net.