RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > U.S. Regional Radio Discussion Forums > Illinois Radio Discussion Forum


Illinois Radio Discussion Forum - Forum for discussing Radio Information in the State of Illinois.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #141 (permalink)  
Old 07-18-2018, 1:00 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2007
Location: Platteville Wi
Posts: 98
Default

Is there any talk groups listed for Whiteside County. I looked at the listing and the slot for Whiteside County Starcom 21 is blank. I could be wrong on this since its been a while since I've been down that way, but I thought Whiteside County SO did not use Starcom. Again could be wrong
Reply With Quote
Sponsored links
  #142 (permalink)  
Old 07-18-2018, 2:44 PM
N9PBD's Avatar
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2003
Location: Southern Illinois (Metro St. Louis)
Posts: 405
Default

Quote:
Originally Posted by werinshades View Post
LOL...actually not true. The term simulcast (Simultaneously broadcasting) has been around way before Starcom. They "patch" talk groups from one system to another..as in Midway's 800 mhz system is "patching" their older UHF-T analog system with their newer 800 mhz system.

CPD uses the term "simulcast" when they transmit in-progress calls across the citywide frequencies, which is still an analog system so they are not trunking and using talk groups. The primary zone transmits the broadcast out across the citywide channels and refer to it as "simulcast".

So in my cast, ITHA isn't "patching" as in using two different systems, but is "broadcasting/simulcasting" across two talk groups on the same system.

Anyway...I think I answered your question and you're welcome.
So, at the risk of dragging this further down the rabbit hole, it is indeed true. Let me quote from the EF Johnson "Simulcasting Project 25" brochure from 2013:

"Simulcast is a technique used to provide Wide Area coverage from a radio
system to subscriber radios. In a simulcast system, the same radio signal is
transmitted by two or more transmitters on the same frequency from different
locations. The intent of simulcast is to extend the radio coverage to an area
larger than a single transmitter can cover, while utilizing a single frequency.

Simulcast systems have a single master site and multiple remote sites. The
master site synchronizes the system timing, so calls are transmitted
simultaneously to all sites for a given repeater channel. This synchronization
reduces the quantity of frequencies needed for the system and simplifies
frequency coordination."


So, although you may be familiar with one use of the term, I am using it correctly in relations to the STARCOM21 - St. Clair County Simulcast system. I may well be misusing the term "patching", when referring to what appears to be the practice of linking two or more talkgroups together, to send the same message on all, *simultaneously*.

So, no worries, you answered my question, and I'll stop poking the bear.
__________________
Greg, N9PBD / WQVW265 TM-D710GA, FTM-400DR, FTM-100DR, FT1DR, DR-1X (MMDVM), CS108G, XPR6550, CS800D, SDS100, BCD536HP, BCD436HP, TRX-2, BC796D, BC785D, IC-7610, IC-706MKII, IC-R75, IC-R7000
Reply With Quote
  #143 (permalink)  
Old 07-18-2018, 3:14 PM
werinshades's Avatar
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Jan 2002
Location: Chicago , IL
Posts: 2,312
Default

Quote:
Originally Posted by N9PBD View Post
So, at the risk of dragging this further down the rabbit hole, it is indeed true. Let me quote from the EF Johnson "Simulcasting Project 25" brochure from 2013:

"Simulcast is a technique used to provide Wide Area coverage from a radio
system to subscriber radios. In a simulcast system, the same radio signal is
transmitted by two or more transmitters on the same frequency from different
locations. The intent of simulcast is to extend the radio coverage to an area
larger than a single transmitter can cover, while utilizing a single frequency.

Simulcast systems have a single master site and multiple remote sites. The
master site synchronizes the system timing, so calls are transmitted
simultaneously to all sites for a given repeater channel. This synchronization
reduces the quantity of frequencies needed for the system and simplifies
frequency coordination."


So, although you may be familiar with one use of the term, I am using it correctly in relations to the STARCOM21 - St. Clair County Simulcast system. I may well be misusing the term "patching", when referring to what appears to be the practice of linking two or more talkgroups together, to send the same message on all, *simultaneously*.

So, no worries, you answered my question, and I'll stop poking the bear.

Thanks for the confirmation...CENCOM (Dispatch Center) was simulcasting on two talk groups. STARCOM 21 (Digital Trunking System) uses numerous sites (simulcasting) to increase their coverage area. No need to apologize for your misunderstanding...LOL!

But...like you when I first saw this on the scanner, it took me a minute to figure it out. Glad I cleared it all up..your welcome. )
Reply With Quote
  #144 (permalink)  
Old 07-18-2018, 4:00 PM
N9JIG's Avatar
Sheriff
  Shack Photos
Shack photos
RadioReference Database Admininstrator
Database Admin
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2001
Location: Far NW Valley
Posts: 3,629
Default

There are several similar terms used. When I was working on a project before I retired the engineers we were talking to used these terms as described below to avoid miscommunication. Your understanding may be different, but they seem to make sense to me...

"Simulcast": Multiple towers talking on the same freq at the same time on a permanent basis (such as how SC21 works in the Chicago area and Metro East).

"Multicast": Multiple radios transmitting the same message on different frequencies, and generally all the time. (Not to be confused with Patches.)

"Patches": Similar to Multicast but generally done on an ad hoc basis, usually one can turn a patch on or off at will, can also be set up automatically by a console system. These can be a patch between systems, such as a dispatcher transmitting a fire call on SC21 and a VHF channel at the same time or patching two channels/talkgroups within the same system as needed (2 SC21 talkgroups for example).
__________________
Rich Carlson, N9JIG

Facts are facts but my opinions are my own and may not reflect those of whom I work for.
Reply With Quote
  #145 (permalink)  
Old 07-20-2018, 2:38 PM
Member
   
Join Date: Jan 2003
Location: ILL
Posts: 2,747
Default

Heard on T113 today TG2966-Mabas 15=River Event1, testing....
__________________
RoninJoliet
Reply With Quote
Sponsored links
  #146 (permalink)  
Old 07-20-2018, 8:07 PM
Member
   
Join Date: Mar 2014
Location: Marshall County, Illinois
Posts: 195
Default Whiteside County

Quote:
Originally Posted by sgtmatt View Post
Is there any talk groups listed for Whiteside County. I looked at the listing and the slot for Whiteside County Starcom 21 is blank. I could be wrong on this since its been a while since I've been down that way, but I thought Whiteside County SO did not use Starcom. Again could be wrong
sgtmatt. As far as I know, Whiteside County is still on VHF - 154.740 / 103.5 PL. I can pick them up from time to time here in Central Marshall County. Putnam County (a close neighbor) also uses 154.740 / 100.0 PL. Different tone, but sometimes bleeds over during transmissions.
Reply With Quote
  #147 (permalink)  
Old 07-21-2018, 1:47 PM
mws72's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2002
Location: Quad-Cities (Iowa-Illinois) USA
Posts: 467
Default

I hear Whiteside on 154.74. There is a air ambulance on Starcom that is based at the Sterling-Rock Falls airport. Maybe that someone got confused
__________________
Michael W. Scheel - Davenport, Iowa - K0QCS - Davenport (IA) ARC - Muscatine (IA) ARC - RCMA IA-011 - USMC Corporal (2531) 1972-1976
Reply With Quote
  #148 (permalink)  
Old 09-20-2018, 4:14 PM
Awesomeman92's Avatar
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Apr 2008
Location: Hoffman Estates, IL
Posts: 517
Default

Hearing Skokie FD being patched to 36496 off site 149. Getting no RIDs other than 0, so they are still using the VHF side for now and patching it over.
__________________
Graduate, Western Illinois University
Emergency Management
Reply With Quote
  #149 (permalink)  
Old 09-20-2018, 4:42 PM
Johnnydollar2's Avatar
Member
  Shack Photos
Shack photos
 
Join Date: Oct 2007
Location: IL
Posts: 938
Default Skokie IL -FIRE

I just heard them do a test on that Talk-Group, yes. "Skokie Fire is on the AIR ...test"
at 16:38 hours in the clear. High pitched tone too along with a long unknown RID just now 16:50 pm
4292941- test tone only 9511725 RID - alarm call Voice after shrill tone
7676719 - test tones only, 993-tone only, 10036107, 79216- tone - voice in the background LOW volume
Last RID had background voices saying "we're working on that" *shrill tone*
RID - 10030011 - returning from Hospital ... still lots of shrill loud noise associated with dispatch/talk-group 17:23 hours
__________________
-------------------------------------------

Last edited by Johnnydollar2; 09-20-2018 at 5:22 PM.. Reason: edits
Reply With Quote
  #150 (permalink)  
Old 09-20-2018, 7:09 PM
Johnnydollar2's Avatar
Member
  Shack Photos
Shack photos
 
Join Date: Oct 2007
Location: IL
Posts: 938
Default

The shrill tone noise I'm hearing on this talk-group is only coming across on the Unication G5 but not on my Whistler WS1080 monitoring the same Talkgroup. There was also a digital delay .. Whistler finishes the dispatch ... Unication then follows up about 4 seconds later with same info.


UPDATE:
Answered my own question. I thought, what if the PPS setup for the SKOKIE FD talkgroup was set up with an alert tone. Their hair trigger scroll always gets stuck on something I don't want when rolling over it to finish the input of the TG data. Sure enough. DEFAULT tone was on. Didn't want that. Back to normal, listening to SKOKIE FIRE
__________________
-------------------------------------------

Last edited by Johnnydollar2; 09-20-2018 at 8:14 PM.. Reason: EDITS
Reply With Quote
  #151 (permalink)  
Old 09-21-2018, 2:58 PM
kevino's Avatar
Database Administrator
  RadioReference Database Admininstrator
Database Admin
 
Join Date: Jan 2005
Location: Chicagoland
Posts: 313
Default

I have added TG 36496 to the Radio Reference SC21 database page. Thanks for sharing the info, and please advise if you end up hearing anything else new or different.

Kevin

Quote:
Originally Posted by Awesomeman92 View Post
Hearing Skokie FD being patched to 36496 off site 149. Getting no RIDs other than 0, so they are still using the VHF side for now and patching it over.
Reply With Quote
  #152 (permalink)  
Old 10-04-2018, 9:13 PM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2002
Location: Joplin Mo
Posts: 496
Default 860.1125 on Greenup site?

While traveling on I-70 in eastern ILL this summer I saw/heard TG 13007 (Disp A Champaign) on this freq with a NAC of 141. This NAC is found on the Greenup Starcom site about where I was, but 860.1125 is not listed in the RRDB nor on the license listed. RID 2906291.
Can someone do a PRO96COM/Unitrunker check on the Greenup site to see if this frequency is actually in use there?
Thanks
W
__________________
Wally Bloss, WB0BAV
HTTP//www.wallybloss.com
A Human
Reply With Quote
Reply

Tags
sticky

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 10:07 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions