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SDS100: MCSO new system

Joined
Jul 29, 2004
Messages
356
Location
Metro Phoenix area
#1
Was listening this morning to the system for a bit. TG #1 sounds like protective services. I heard them checking different locations at various buildings downtown. I forgot my notes but 2930001 sounds like it is the dispatch person (they referred to him as admin) also I noticed slot 1 blinking on my scanner. What does that mean?

There were 2 other TG that were active which sounded like maintenance. They were working on air handlers and fire pump testing.


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Joined
Jul 29, 2004
Messages
356
Location
Metro Phoenix area
#2
Ok. Here is what I can guess to some of the TG’s that are by listening to the system the last few days.

1203 - Animal Care and Control Main. 1220005 is dispatch ID
1204 - Animal Care and Control TAC
2301 - Maintenance
2303 - Maintenance
2403 - Public Health? (Talk about clinic and sending people in to visitation).
1 Protective Service/security or what ever they go by now.
(Previous post has dispatch ID)

I have not heard any a Deputy’s or Detention yet on here. So I guess they are slowly switching people over.


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Last edited:

mm

Member
Joined
Dec 19, 2002
Messages
596
#4
SLOTS 1 AND 2 in this case are unique to TDMA, TIME DIVISION MULTIPLE ACCESS systems as opposed to p25 phase 1 which is a FDMA, FREQUENCY DIVISION...system.

In TDMA, 2 seperate talkgroups can share the same voice channel/FREQUENCY with a first in basis of the #1 talkgroup(TG'S) assigned to time slot 1 and the 2nd in talkgroup assigned to time slot 2 but both TG'S using one single frequency.

With FDMA these 2 same talkgroups would require 2 seperate voice channels/frequencies and a phase1 scanner would miss talkgroup 2 activity while locked on talkgroup 1.

With a TDMA scanner you can possible listen to both talkgroups activity in stereo with example talkgroup 1 in the right ear and talkgroup 2 in the left air with the scanner sitting on 1 single frequency.

I do this with a sdr dongle and sdr sharp outputting IQ DATA to the DSD+ DIGITAL DECODER with DMR systems because there are no p25p2 systems where I live.

To do this with a phase 1 FDMA system simultaneously listening to 2 TG'S at the same time requires 2 scanners.

MM
Prescott
 

KR7CQ

Member
Premium Subscriber
Joined
May 20, 2013
Messages
848
Location
Phoenix
#6
2902 is Security Services
1203 is Animal Care and Control
2301 is maintenance

It seems like they are slowly adding people to the system. I will listen more next week when I have some time.
I need to get back to listening to this system more as well...good to see it coming to life. Thanks for posting the update.
 
Joined
Jul 29, 2004
Messages
356
Location
Metro Phoenix area
#7
2701 sounds like parks. They were just talking about a campsites that was packing up early. I did not hear which park it was. Not sure if they are doing one for each park or how.


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N9JIG

Sheriff
Moderator
Joined
Dec 14, 2001
Messages
3,839
Location
Far NW Valley
#8
Got a couple hits on 1301 from the White Tanks site today.

I think 2701 might be White Tanks Regional Park as I got a lot of hits from that at the White Tanks site as well.

A couple new freqs logged by ProScan at the White Tanks site: 771.65625, 771.90625, 772.15625, 772.40625. Looks like the only channels logged that were listed in the database was the control channel of 774.65625 and voice channel 771.40625. I cleared the log and will check back again later now that I deleted all other sites, just to be sure...
 
Last edited:
Joined
Jul 29, 2004
Messages
356
Location
Metro Phoenix area
#9
I picked up the parks yesterday. It was the entry point talking to the nature center. Not sure how the new stuff is set up yet.

2303 is maintenance 3. Heard them a bunch today on it talking about fixing stuff and saying, “on 3”

I did not pick up any new stuff today listening.


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Joined
Jul 29, 2004
Messages
356
Location
Metro Phoenix area
#10
Anyone else listening to this system?

Here is what I have so far:
2301 FMD-1
2302 FMD-2
2303 FMD-3
1502 Radio Shop
2201 Equipment Services
1403 McDOT
2902 Security Services
1203 Animal Care and Control

Here is what I have seen pop up but do not know what it is yet:

1203 Animal Control tac or maybe they have it divided like East and West or North and South?
1301
1404
1407
1501
2403 - Public Health?
2404
 
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