• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Columbia County Radio System Facts?

Status
Not open for further replies.
Joined
Nov 26, 2013
Messages
34
#1
I was reading up on Columbia Co radio system and see it is analog? I am able to monitor their dispatch and talk groups (duplex frequencies) with a Baofeng UV-5R. I am curious as to what sort of system they use and how it works. Is there a term that explains this? I am only wondering in comparison to Dauphin County (my home county) which uses Motorola Astro P25 Phase I Digital UHF.
 

captclint

Mentor
Premium Subscriber
Joined
Dec 31, 2005
Messages
2,448
Location
Mountaintop, PA
#2
I was reading up on Columbia Co radio system and see it is analog? I am able to monitor their dispatch and talk groups (duplex frequencies) with a Baofeng UV-5R. I am curious as to what sort of system they use and how it works. Is there a term that explains this? I am only wondering in comparison to Dauphin County (my home county) which uses Motorola Astro P25 Phase I Digital UHF.
Analog is one of the oldest types of radio communication. It comes in three major flavors: Simplex(base and mobile on same freq), repeaters and Trunking. Duplex is not common, but PSP used to use. What you probably mean is input and output of a repeater on different freq's. There are no talk groups in Columbia. This term refers to a trunking system, which is not used. In Columbia All FD are simplex(BM under type), but PD uses a repeater( (RM under type)

Digital can also be simplex, but more often it is trunked, as in Dauphin. See:
Trunking Basics
Trunked Radio Systems -
APCO Project 25 Digitali
 
Last edited:
Status
Not open for further replies.
Top