York County - HARRIS RF COM - p25 System

Status
Not open for further replies.

PCPA

Member
Joined
Dec 19, 2002
Messages
153
Location
PA
I'm still not seeing what the ultimate benefit of a full system simulcast would be, other than ease of use by scanner listeners.

Just remember that "scanner listeners" include emergency responders using the MACOM system on MACOM equipment in scan mode. A portable or mobile in scan mode is not considered logged in to any system, so the ablility to receive calls on any TG depends on having a radio within that system locked on to that TG. Once the portable or mobile is taken off scan mode it is logged into the system on a particular TG and that TG will be broadcast. But hit the scan button and you will receive no more and no less than someone with a Uniden or Radio Shack scanner.
 

brey1234

Completely Banned for the Greater Good
Banned
Joined
Sep 5, 2003
Messages
1,126
Location
Pennsylvania
York Co Radio Woes

"On the new system, if we're using two (portables) at any one time, if one transmits, it seems to knock the other one off the system," said Ted Hake, chief of emergency medical services for Yoe Fire Company Ambulance Service Inc. "It seems that either the upper management or their consultants completely underestimated working with 22 police departments, 69 fire departments and 44 EMS agencies."
Morrin said the problems with the new system can be tied to its distributor and installer, M/A-Com, a division of Berwyn-based Tyco Electronics.
http://ydr.inyork.com/ci_11278851
 

MikeGranby

Member
Joined
Jul 5, 2006
Messages
4
Location
York, PA
Is the control freq for the Central system correct? I'm near Wrightsville, and I've been picking up voice on the listed freq. I scanned manually and found data on 501.53750, and when I set this as the control channel, everything came to life...
 

GregStough

Member
Premium Subscriber
Joined
Mar 31, 2006
Messages
17
Location
USA
Is the control freq for the Central system correct? I'm near Wrightsville, and I've been picking up voice on the listed freq. I scanned manually and found data on 501.53750, and when I set this as the control channel, everything came to life...


Mike,

When I used the downloading feature from RR for York's P-25 system it added the one (1) main control frequency for each of the areas, like the Central Area. By running my digital scanner on the P-25 system and an analog scanner on the oll conventional system I found that I was not hearing all of the transmissions on the new system. As a matter of fact, some times I would not hear anything on the digital scanner for hours or more. Someone suggested adding all of the listed frequencies (or as many as possible) and not just the control frequencies. I could not add all of the frequencies, but I added as many of them into my scanner as I could from the areas that I most likely expect to be in and that took care of the problem.

So, I'd suggest adding as many of the frequencies of the Central System as you can and I would expect that you would have pretty good coverage. It is my understanding that if you have the control frequency you don't need any other frequencies added to a scanner monitoring a P-25 system. I thought the control channel would tell the scanner which frequency to go to for the transmission. Apparently that is not correct. Based on my experience it seems that you have to add as many of frequencies as possible, and not just the control frequency.
 

MikeGranby

Member
Joined
Jul 5, 2006
Messages
4
Location
York, PA
Greg,

Thanks for this. The explanation could be, though, not that the scanner needs more than one frequency to operate, but that the freq or freqs tagged as control frequencies in the database are incorrect, or that the system keeps changing its control frequency for some reason.

Cheers, Mike.
 

GregStough

Member
Premium Subscriber
Joined
Mar 31, 2006
Messages
17
Location
USA
Greg,

Thanks for this. The explanation could be, though, not that the scanner needs more than one frequency to operate, but that the freq or freqs tagged as control frequencies in the database are incorrect, or that the system keeps changing its control frequency for some reason.

Cheers, Mike.

Yes Mike, you are correct, there are a number of possible reasons for this issue. After I had corrected the problem on my scanner I asked here on RR for some additional information to clear up my understanding of P-25 systems (at least York's system), and to get a better understanding of how it works. Unfortunately I never received a reply from anyone. So, I'm not sure why there is a problem. But I'd like to find out to gain a better understanding.

- Greg
 

MikeGranby

Member
Joined
Jul 5, 2006
Messages
4
Location
York, PA
As I understrand it, each system operates on a number of frequencies, one of which is the control channel and the others of which are used for voice transmissions. The voice channels are dynamically allocated as and when a user needs to transmit, so if you monitor any given voice channel in conventional mode you'll hear it only break squelch every now and again, and you'll typically catch only one transmission, rather than a whole conversation. The control channel ought to be transmitting continuously and will therefore break squelch all the time if you try to tune it in manually -- but you'll only hear clicks and buzzes. This is the digital data that is used to allocated voice frequencies and manage the system.

So, if you have the list of freqs for a given site, you ought to be able to find the control channel by tuning each one manually using (eg. using TUNE mode on a PRO-197) and looking for the one with continuous transmission of data. Conversely, if you have a putative control frequency configured your system, but aren't getting any reception, tune it manually or enter the equivalent of the PRO-197's TSYS Analyze mode and see what's being transmitted. If it doesn't break squelch, something is wrong, and if it breaks squlech occasionally and you hear voice, you've got a voice channel tuned instead.

So, as I underatand it, once you've got the right control channel in, the tuning of voice channels ought to be automatic as the frequency information is extracted from the control data. One thing I don't quite understand is whether or not more than one control channel can be used, and whether the system is capable of using channels as either control or voice depending on circumstances.

For example, if the primary control channel is down, can the system use a secondary control channel so as to provide better redundancy in the form of protection against a single transmitter failure? In that situation, though, I would have thought that the primary control channel would simply be dead. That would imply that if you've got a control channel tuned and you hear voice, it's either not a control channel at all, or it's a secondary control channel that is being used as a voice channel as the primary is up.

Another similar question I had was whether the system cycles through control channels to provide load balancing between transmitters: since the control channel is always on, it would presumably otherwise gets more of a work-out and fail more often. That would mean that the receivers would indeed need all the freqs loaded, as they'd have to find the active control channel and be prepared to scan in case the signal drops and they need to reacquire the control data. But that isn't how I understood things to work.

Perhaps some who knows can say for sure???
 
Last edited:

dcr_inc

Feed Provider *York Pa.*
Premium Subscriber
Joined
Feb 28, 2005
Messages
1,032
Location
Delta, Pa
Control channel

Yorks system has the capability to use ALL channels as a control channel. Typically, it resides on channel 1. If channel 1 is in trouble, it rolls to 2, and then 3 if needed etc,etc, etc.. It does NOT roll automaticaly like Motorola does.. Continious duty means just that, Continious.. In the past weeks the control channel has been moved while the systems have been worked on.. They will reside on channel 1 when all is said and done.

Dave
 

dcr_inc

Feed Provider *York Pa.*
Premium Subscriber
Joined
Feb 28, 2005
Messages
1,032
Location
Delta, Pa
Pcpa

"A portable or mobile in scan mode is not considered logged in to any system, so the ablility to receive calls on any TG depends on having a radio within that system locked on to that TG. Once the portable or mobile is taken off scan mode it is logged into the system on a particular TG and that TG will be broadcast. But hit the scan button and you will receive no more and no less than someone with a Uniden or Radio Shack scanner. "

Not true, When you first turn your radio on, it REGISTERS to a system and talkgroup. When you scan you are still registered to the original talkgroup, but not dragging the scan list talkgroups to the system you are registered to.
 

MikeGranby

Member
Joined
Jul 5, 2006
Messages
4
Location
York, PA
Dave,

Thanks for that. I guess that means that one should load all the freqs, then, to ensure that the scanner will handle roll-over situations.

Cheers, Mike.
 

PCPA

Member
Joined
Dec 19, 2002
Messages
153
Location
PA
"A portable or mobile in scan mode is not considered logged in to any system, so the ablility to receive calls on any TG depends on having a radio within that system locked on to that TG. Once the portable or mobile is taken off scan mode it is logged into the system on a particular TG and that TG will be broadcast. But hit the scan button and you will receive no more and no less than someone with a Uniden or Radio Shack scanner. "

Not true, When you first turn your radio on, it REGISTERS to a system and talkgroup. When you scan you are still registered to the original talkgroup, but not dragging the scan list talkgroups to the system you are registered to.

That's not the way the Tyco train-the-trainer trainers explained it. They made it sound as though once you hit the scan button there would be no guarentee of hearing your registered primary talkgroup, even if that had been set as Priority One.

I like your information better. Relieves some major concerns.
 

dcr_inc

Feed Provider *York Pa.*
Premium Subscriber
Joined
Feb 28, 2005
Messages
1,032
Location
Delta, Pa
Tower

Matt,
We have not taken any sites (towers) down.. We did ask Dauphin to take 2 of their channels down for a few (48) Hours a week ago so we could have clear air for some testing we were doing in the Reesers area..

The system problem has to do with the DSP modules in the repeaters. The company "brains" are working long and hard to resolve the issue..
 

ocguard

Member
Premium Subscriber
Joined
Nov 9, 2002
Messages
1,288
Location
PA/MD
Thanks Dave. Bad info from the PD forum.

Is Dauphin's P25 equipment being put on the same tower as York's at Reesers?

If PD (or fire/EMS) agencies were to license their own UHF simplex or repeater frequencies for their private use, will the county accommodate programming them into the agency's P25 radios? Just curious.

Also, would it be advantageous in the next (and hopefully final) round of countywide reprogramming to put UTACs in the radios in both simplex and duplex modes, in case a nearby county at some point builds a UTAC repeater network. Maryland is progressing in what they call their "TAC Stack" which will place at least one interop repeater for each band (8-tac, 7-tac, u-tac, and v-tac) at each state-owned tower. Just an idea.
 

dcr_inc

Feed Provider *York Pa.*
Premium Subscriber
Joined
Feb 28, 2005
Messages
1,032
Location
Delta, Pa
Ressers

Matt,
No, Dauphin is not at Reesers but east of Fairview..

Yes, One freq has been authorized per agency.. Not sure if there was a cut off date as most of those requests have been filled months ago..

I agree.. Maybe the Fire re-do will have one.. Simplex was chosen due to more use nationwide..

Dave
 

PCPA

Member
Joined
Dec 19, 2002
Messages
153
Location
PA
Dave,

On the UTAC issue some of the troops are rightly concerned that the way most portables are configured, if the UTAC button is hit there is no way out of that mode except to turn the portable off and on. But there are some portables that can toggle back and forth from UTAC to P25.

What would it take to get all the portable able to toggle back and forth? In a emergency (like a fight on the Police side) the UTAC button could easily be bumped and then you are SOL unless somebody in scanner land happens to be monitoring UTAC and you happen to be close enough to them to be heard.
 

gr8tff

Member
Premium Subscriber
Joined
Jul 29, 2004
Messages
64
Location
Hanover, PA - Montgomery Co, MD
York County 911: Back to the past?

York County 911: Back to the past?

York County might have to return to its old radio system, at least temporarily, while the new system is being fixed.
By TED CZECH
Daily Record/Sunday News

Updated: 01/10/2009 10:24:59 PM EST






In a Dec. 24 e-mail, Eric Bistline told county police chiefs that because of ongoing problems with York County 911's new radio system, the county might have to return to the old system as a last resort.
Bistline, who is York County's director of emergency services, also wrote that he has told M/A-COM, the new system's manufacturer and installer, to develop a plan to move the county back to the old system.
"Obviously, we're having problems with the radio system," Bistline said Wednesday from Lynchburg, Va., where he was meeting with executives of Tyco Electronics, M/A-COM's parent company. "This is a huge undertaking . . . We knew there were going to be things that we'd need to address as we went along."
However, he added later, "We thought it was going to be a smoother transition."
York County opened bids to replace its antiquated system in 2005 and chose between M/A-COM and Motorola.
Testing of the $36 million system, which includes radios, software and towers, began in early 2008. Several glitches -- including lost or garbled transmissions -- were discovered as agencies "cut over" to the new system in the latter part of the year.
Bistline's e-mail also told chiefs that he is halting the installation of radios in police cruisers to prepare for the possibility of going back to the old system. "If this was going to be a very protracted thing . . . I just didn't want to get any more users on there," he said. "I didn't want to
put anybody in harm's way."
Bistline said that, if the county returned to the old system, it would be a temporary move.
"Our plan was never to scrap it," he said. "We may have to go back for an undetermined amount of time, (but) there's no way we're going to throw this thing in the trash."
M/A-COM spokesman Steve Frackleton said in a December interview the problems with the system are akin to typical growing pains.
"For a system this size, yes, we're in the middle of a typical implementation program," he said.
M/A-COM technicians are working to identify and develop solutions for any problems with the new system, Frackleton said.
Despite the problems with the new system, Bistline remained positive, saying he didn't think reverting to the old system would ever happen.
"I don't think we're ever going to get there," he said. "Every day, we're having progress."
Chiefs respond
Fairview Township Police Chief Bernard Dugan, who is president of the York County Chiefs of Police Association, said his counterparts are concerned about the ongoing problems with the new radio system.
On Bistline's "last resort" to revert to the old radio system, Dugan said, "If that's what it takes, then that's what it takes. . . . More and more it's appearing there are some issues that are more than little tweaks."
Dugan said the chiefs association plans to send a letter to the York County commissioners and Bistline voicing their concerns about the persistent problems.
"We can't keep on going much longer without some resolution," he said.
Still, Dugan said Friday he wanted to allay any fears the public might have about reduced police coverage.
"We still can communicate to get police services wherever they need to be," he said.
Although a few police departments around the county have discarded their old radios, Dugan said his department has not, to have them as a back-up.
John Snyder, police chief in Newberry Township, said his officers have carried Nextel phones for several years as a back-up so they can talk with each other and York County 911 if their radios are inoperable.
With the new system, Snyder's officers have told him about "dead spots" in their jurisdiction and trouble with transmitting, "but we had that with the old radio, too," he said.
"All I know is when I press the button, I want it to work," Snyder said.
Southern Regional Police Chief James Childs said Bistline's e-mail was about putting M/A-COM "on notice . . . look, let's step up to the plate and get things working."
"It was a surprise to me, but that says to me that he's (Bistline) willing to do whatever it takes," Childs said. "We can't lose faith in it; he's trying to make it work."
Rectifying the situation
Bistline said that, since late last year, Tyco technicians, programmers and engineers -- a group he describes as the company's "best and brightest" -- have been in York County to fix the new system.
Bistline also set up a system through which police officers can call a York County 911 supervisor and report problems with the system. The details are entered into a database, which is sent by e-mail to M/A-COM and York County 911 representatives. Every day, county officials have a conference call with M/A-COM to discuss the problems and how to solve them, he said.
Bistline said that, before the contract was awarded, the county researched M/A-COM and Motorola.
"We did detailed background checks on the companies, called references," he said.
Still, M/A-COM has attracted controversy in other parts of the country. On Aug. 29, the State of New York's Office of Technology issued a letter of default to M/A-COM, saying that its OpenSky communications system was found to be unreliable on three separate occasions. The state gave M/A-COM 45 days to fix the problems.
A news release on M/A-COM's Web site, also dated Aug. 29, states, "Contrary to public allegations made by OFT, Tyco Electronics has met or exceeded contractual requirements for the project and is prepared to vigorously defend that position."
A story in The New York Times on Saturday said New York state officials are close to canceling its $2 billion contract with M/A-COM.
Lawyers for M/A-COM countered with threats of a lawsuit, the report states.
"A major problem has been the difficulty and unanticipated cost of installing radio towers in remote, mountainous areas, according to the officials and technical experts, who spoke anonymously because the contract dispute is at a delicate juncture," the newspaper report states. "To finish the project, state officials decided that considerably more money would have to be spent at a time when the state is expected to have large budget deficits."
In March, Lancaster County commissioners ended their contract with M/A-COM to set up a radio system, according to a Lancaster New Era story. Years after the contract had been signed, the county realized that it could buy items such as portable radios far more cheaply than what M/A-COM was offering.
The Lancaster story did not contain a response from M/A-COM. "I keep my finger on the pulse of that situation up there (in New York), as I do with Lancaster," Bistline said. "I want to see what their response is, are they able to address those needs. . . . Quite frankly, the New York state system is a different technology, (but) it does make you wonder if you're going to have those problems."
 

brey1234

Completely Banned for the Greater Good
Banned
Joined
Sep 5, 2003
Messages
1,126
Location
Pennsylvania
An Opinion On York Co Radios

It's hard to decide whether we should be alarmed or relieved that the guy in
charge of the county's new 911 system has, well, dialed 911.
Recently, Eric Bistline, director of the county's emergency services
department, told M/A-COM, the $36 million system's manufacturer and installer, to
develop a plan to move the county back to its old system.
Huh? Back to the system that police and firefighters said was riddled with
"dead spots," endangering citizens and emergency responders? Why would the
county want to do that?
Because it seems this new system is crawling with bugs and glitches.

http://ydr.inyork.com/ci_11450829
 
Status
Not open for further replies.
Top