June 26, 2017 2:58 pm EST
"Philipsburg's Bravest - Proud to Serve"
InformationHistoryPersonnelSearchable Report DatabaseApparatusEngine 11-10Rescue 11-18Tanker 11-19Utility 11-22Brush 11-25The BuffaloLaFrance SteamerMultimediaPhoto GallerySound GalleryIncident AudioVideo GalleryMore VideosRecruitmentPublic ServiceFatal DecisionsHistorical IncidentsFallen Heroes Scanner RadioFrequenciesTrunk TrackerStation ListingsFire SafetyHome HazardsSmoke DetectorsCarbon MonoxideFire ExtinguishersStop, Drop, and RollCalling 911Resource ListsHydrant AreasNon-Hydrant AreasMore News2007 News Archive2006 News Archive2005 News Archive2004 News Archive2003 News Archive2002 News Archive2001 News Archive Frequencies and Codes
Low Band Mutual Aid Frequencies
Frequency
Assignment
46.140Clearfield County Dispatch
46.200Tactical Operations 1
46.280Tactical Operations 2
46.320Tactical Operations 3
46.340Tactical Operations 4
46.060Centre Dispatch (not used)
Frequency
Assignment
467.950Clearfield Med Transmit
462.950Clearfield Med Receive
467.975Centre Med Transmit
462.975Centre Med Receive
462.950Med 9 Talk-Around
462.975Med 10 Talk-Around

The frequencies in the table above are in limited use by Hope Fire and Rescue but are still utilized for communications with Clearfield County for mutual aid incidents.

800 MHZ Trunked Radio System
Hope Fire and Rescue has moved its primary operations to the 800 MHZ
trunked radio system for Centre County. The initial dispatch (paging) is simulcast
on 800 MHZ and a county paging frequency of 453.975 MHZ. All Minitor II pagers
are tuned to the county paging frequency. Once an officer establishes command,
an operations channel is assigned and the simulcast is ended. All radio traffic then occurs on the trunked radio system.

Dispatch Paging - 453.975 MHZ

Centre County 911
Receive Frequency
(MHZ)


Centre County 911
Transmit Frequency
(MHZ)

810.7375 855.7375
810.9875 855.9875
811.4625 856.4625
811.9625 856.9625
812.4625 857.4625
812.9625 857.9625
813.4625 858.4625
813.9625 858.9625
Denotes Repeater Frequency

So What Does Trunking Mean?
There are two types of radio systems, conventional and trunked. In a conventional system the radio message between the station and units in the field occur on one frequency. At any given time, some of the frequencies or channels may be so busy that messages are delayed or "stepped on", while other channels are lightly used or not used at all. When several departments share a single frequency, they may cause interference with each other. This is the case with the low band fire frequency 46.140 MHZ. Trunking is a method that utilizes all frequencies in the radio system to its maximum potential. In a trunked system, all stations and units share all the frequencies. When a message between a station and a unit is commenced, the trunked system automatically selects an unused frequency and switches all radios in the system to that frequency. No one frequency is assigned to any department and the frequency could change every time a transmission is made. In a trunked system, one frequency serves as the control or "hand shake" channel. The control channel can be recognized by the loud buzzing noise and is switched to a different frequency each day. This buzzing is the data stream that all radios tune to, this is done automatically. The entire system is managed by a computer known as a Site Controller. When a microphone on a radio is pressed, a signal goes to the Site Controller which selects an unused frequency. The Site Controller then sends out data on the control channel and switches all radios to the appropriate frequency. In the Centre County Trunked Radio System, there are actually two systems in operation. A one tower trunked system serves the State College region of the county. Agencies on this system include State College Police and Penn State University and reception is limited to this area. The second trunked system is the super system and is county wide. Reception can be received throughout Centre County by the use of multiple towers and services include the Fire Departments and Township Police Departments.

Users Online
[an error occurred while processing this directive]
[an error occurred while processing this directive][an error occurred while processing this directive] user(s) in HFC Chat[an error occurred while processing this directive] Home | Contact HFC | Mission Statement | Member Login | HFC Email | Links

[an error occurred while processing this directive]
This page viewed 11,332 times (1 today, 2 this week, 43 this month, 323 this year)

Copyright 1997 - 2009 CentreCountyFire.com
All Rights Reserved