Sacramento Regional Radio Communications System

Status
Not open for further replies.

certifiedrss

Member
Joined
Feb 13, 2002
Messages
13
Location
san diego
Sacramento Trunk Control Ch's

So Which Channels(freqs) Should Be L/o To Have The Scanner Trunk Correctly. It Is Showing A Cc Ch Of 868.9625
 

sac-emt

Member
Joined
Jan 26, 2006
Messages
171
After I heard that there was a change again on CC freq. for the County TRS. I made the change, but at noon it went dead.

I had this freq. 868.7375 as the CC.

I checked again and I was getting that freq. as a CC and also 868.9625.

As of now, the latter freq is what is currently working.

Talk about scrambling, but it makes "Scanning" fun.
 

RolnCode3

Member
Joined
Jun 7, 2004
Messages
2,255
Location
Sacramento/Bay Area, CA
This is changing daily, if not several times a day. In order to keep track of it, you're going to have to experiment, and manually flip back and forth on the frequencies till you figure out where the CC is. It's tedious, but the only way.
 

RolnCode3

Member
Joined
Jun 7, 2004
Messages
2,255
Location
Sacramento/Bay Area, CA
Currently running Unitrunker on the old County TRS (4328). I wiped out the frequencies before loading it up, and it appears they're only running 13 frequencies in the old system.

For right now, there's not enough traffic on the new system to verify if the others are actually being utilized on the new system, but last I checked it was around 10 or so (although I didn't actually count). I thought maybe there was a decode error, so I discounted it...looks like it might have been correct.

Running Unitrunker (also wiped clean the freqs) shows they're using 10 frequencies on the old system (4428). Appears 14 on the new system. I thought they had 25 total, so there's either 1 that just hasn't shown up, or a decode error missed it.
 
Last edited:

WayneH

Forums Veteran
Super Moderator
Joined
Dec 16, 2000
Messages
7,535
Location
Your master site
RolnCode3 said:
Running Unitrunker (also wiped clean the freqs) shows they're using 10 frequencies on the old system (4428). Appears 14 on the new system. I thought they had 25 total, so there's either 1 that just hasn't shown up, or a decode error missed it.
If you deleted the other reported control channel you won't see it used for voice unless the system uses up the normal traffic channels. This only goes for SmartZone. The older system would use all channels unless one or more was marked protected.

-Wayne
 

WayneH

Forums Veteran
Super Moderator
Joined
Dec 16, 2000
Messages
7,535
Location
Your master site
I was trying to explain without getting too technical but I'll explain in more detail for others.

Motorola trunked systems (non-SZ) have the ability to mark channels (freqs) as protected. What this means is that they are available for use but will only be used on a last choice basis. If a channel, which is normally used for control, is protected it will be taken out of rotation (for older systems that auto-rotate CCs) and will only become a control channel when all non-protected CCs have failed. If the channel is marked for dispatch (normal voice) and is marked as protected then the system will only assign that channel for a call when all non-protected dispatch channels are in use. Non-protected channels are always assigned in sequential order and will be used regardless of system load levels. There's a possibility that a channel may seem to not be used as much and that's due to the timeout variable for replying to an active conversation. If the timeout expires the controller resets the channel assignment back to "one" and starts channel assignment over. (All channels in Motorola 3600 systems are assigned a simple numerical identifier [1 thru 28]; this is done for simplicity so you don't have to refer to channels by their frequency)

With SmartZone you still have the option to mark channels as protected but the logic in assignment changes a bit. Channels marked as control or for base station identification are automatically assigned as protected. That makes sure that the callsign will always be announced on-time and the alternate control channels will be immediately available if the primary control channel fails. With SZ you designate a primary control channel and the system will do its best to stick to it. Btw, being the Sac system is in a state of installation don't assume anything is static just yet.

-Wayne
 

sacscan

Member
Joined
Sep 17, 2005
Messages
370
Location
Sacramento, CA
I'm hearing what sounds like Grant PD (25616 on the old system) on analog talkgroup 56048 on both sites on the new system.

EDIT: Just heard another analog talkgroup that sounds like parking control - 56720.
 
Last edited:

Sac916

Member
Joined
Dec 19, 2002
Messages
1,402
sacscan said:
I'm hearing what sounds like Grant PD (25616 on the old system) on analog talkgroup 56048 on both sites on the new system.

EDIT: Just heard another analog talkgroup that sounds like parking control - 56720.

Yup yup, they (the techs) are slowly patching old/new systems together. You'll hear more and more users patched together, running simulcast on both systems.
 

servo_fan

Member
Joined
Nov 18, 2005
Messages
175
Location
Sacramento, CA
I don't know if this means anything as far as system progress goes, but up until today, I have not needed to lockout any control channels on either the city or county systems. I have a BC245 and no matter what seemed to be going on with the testing, I kept getting all the talkgroups and traffic, just like always, like the good ol' BC245 would only lock onto the "correct" control channels.

But today, I was noticing some very long periods of silence on both systems, and thanks to using the BC245Int program, I was able to see what CCs my scanner was using. Today, for the first time ever, my scanner was using the CCs that have been assigned to the new hybrid system. Once I locked them out, I'm back in business of course, but I thought it was strange that all of the sudden I was locking into the CCs for the new system.

Just an FYI to any other 245 or older scanner users out there like myself who never had to lock out the CCs before now.
 

sacscan

Member
Joined
Sep 17, 2005
Messages
370
Location
Sacramento, CA
Edit to my last post: 56720 is not parking control. May possibly be Los Rios Community College District PD.

Heard Sac PD on analog talkgroup 60304 today.
 

RolnCode3

Member
Joined
Jun 7, 2004
Messages
2,255
Location
Sacramento/Bay Area, CA
Here's Unitrunker's group ID list for C116. The first number of each line is the TG ID. Opens with notepad...comma seperated file.
 

Attachments

  • MotoC116.zip
    750 bytes · Views: 62
Last edited:

Sac916

Member
Joined
Dec 19, 2002
Messages
1,402
RolnCode3 said:
Here's Unitrunker's group ID list for C116. The first number of each line is the TG ID.



.GID file ??

edit: never mind - opened with NotePad


.
 
Last edited:

sacscan

Member
Joined
Sep 17, 2005
Messages
370
Location
Sacramento, CA
New system talkgroups

I have noticed that Grant Joint Union High School District PD's talkgroup 56048 and Los Rios Community College District PD's talkgroup 56720 are NOT simulcast. The old talkgroups (25616 and 27696) are no longer in use on the old system.
 

Sac916

Member
Joined
Dec 19, 2002
Messages
1,402
sacscan said:
I have noticed that Grant Joint Union High School District PD's talkgroup 56048 and Los Rios Community College District PD's talkgroup 56720 are NOT simulcast. The old talkgroups (25616 and 27696) are no longer in use on the old system.

I noticed the same thing late last night

Grant PD Ch. 1 56048
Grant PD Ch. 2 56080

Los Rios Ch. 1 56720
This is an easy catch because they do Roll Call every 60 minutes.
 

kma371

QRT
Joined
Feb 20, 2001
Messages
6,204
I think Co. Fire Group A's will be somewhere around the 59230's - 59240's on the new system. I had heard almost all of the Group A's talkgroups being activated in sequence on the 4328 system, at the same time a bunch of new talkgroups came up on the new system 1116. I was only able to write the following down; 59248, 59280, 59312. There were others.

Bill
 
Status
Not open for further replies.
Top