Ga State Patrol
Hi !!
Glad my first note was of help.
Extenders / Pac-Rt's are real time. No delay. Hearing the same thing stated on 154.800 after hearing it on 458.4875 could have been the result of the post dispatcher asking the trooper to repeat his traffic.
458.4875 is the freq being broadcast off of that little 4-inch antenna you see on a GSP car. The trooper's portable is receiving 458.4875.
When the trooper keys the "mike", the portable transmitts TO the car on 453.4875 Mhz. So if you are listening to 458.4875 and you see the trooper key the mike, you will not hear them unless you are either on 154.800 OR the portable tranmit freq of 453.4875 Mhz.
When listening to 154.800, you can tell if a trooper is on their portable/pac-rt because the audio will have a heavier bass tone to it. Also you will hear a stong "hiss" sound before the signal drops off. That "hiss" is squelch tail (static burst) of the car's repeater (pac-rt) dropping off.
Here's what I listen to for GSP:
154.680 / 154.800 / 154.935 / 154.905 / 155.370 / 458.4875 / 155.475
154.935 & 154.905 are called "State Band" or just "State". 154.905 is base to car and car to car. 154.935 is car to base and base to base. If a county dispatch wants to speak to a GSP post, they do it on 154.935.
If a county car wants to speak to a trooper, they use 154.905 which is also known as Channel - 4 or "State Car to Car".
If a county sheriff deputy wants to call a GSP post, his car will transmit on 154.935 while the post will broadcast on 154.905.
If a trooper wants to speak to a county deputy or 911, troopers usually have the counties they patrol programmed into their radios. This is as long as they are on vhf (154, 155, etc). In those cases, the trooper will switch and speak directly on the county system. Here in Lagrange, a trooper will call in by saying, "GSP 745 to Troup 911". Same for DNR (game wardens). They too can and do access county systems in addition to their own DNR repeaters.
Officially, city agencies are to communicate with troopers or other towns via 155.370 which is an Inter-city channel. This usually ends up being used as a tactical channel by some towns. Instead, towns ususally go ahead and use "State Band" as descirbed above.
The first time I ever heard GSP on 155.475 was on a bicycle race coming through LaGrange. Usually 155.475 is used as another tactical channel by counties or towns.
Russell County, Alabama refers to 155.475 as "Pursuit". This I suppose since if they pursued a car into Georgia, they'd use 155.475 since it is to be a common channel nationwide.
If you think of anything else, please write. I hope you get to hear all you want.
By the way........if you are close enough to the Augusta area, they link into South Carolina's "Palmetto 800" statewide system. Trunked 800.
Need anything else, just drop a note.
Also, check
www.ScanAtlanta.com which is another great site for Georgia info.
Take care,
Julian 8)
julian780@bellsouth.net
Member
www.ScanAtlanta.com Webring.