RedPenguin
Member
- Joined
- Feb 28, 2007
- Messages
- 1,081
I was looking at this page:
http://www.radioreference.com/apps/db/?aid=995
And saw this:
"Note:
This may answer why you cannot hear the mobile units (officers), but you can hear the base (dispatchers).
The common configuration for CHP Base & Mobile operation is duplex. What this means is the radio site does not act as a repeater; the radio site has a transmitter on the Base frequency and a separate receiver on the Mobile which are not linked locally. The audio from the Mobile receiver is sent over the DGS microwave network to an audio switch. The Base transmitter receives its audio from this same switch also. This is an advanced setup where the audio switch can be controlled to repeat the Mobile audio back to the Base transmitter by splitting the audio path off. Dispatchers have this ability to enable splitting the Mobile audio path and sending it back to the Base radio at the site. In these situations because of the round-trip time it takes for the audio to be switched there can be delays causing rough audio. Often this is why a normally Mobile repeated Base will cease retransmitting Mobile audio. Also, CHP Dispatchers have the ability to see which site the unit was received from. They can choose to just transmit at that site (e.g., what's common for the Blue) or through the whole network.
The audio switch not only has access to CHP but other agencies also. Since you're dealing with audio paths they can be combined and split in various manners."
I re-read it like 3 times, but it just sounds confusing. I mean I thought I knew my radio scanner stuff but this is odd. I think I understand it for the most part, that it's not a normal repeater system, and it uses microwaves, but what's the point of doing all this in the first place and not just using a normal repeater?
http://www.radioreference.com/apps/db/?aid=995
And saw this:
"Note:
This may answer why you cannot hear the mobile units (officers), but you can hear the base (dispatchers).
The common configuration for CHP Base & Mobile operation is duplex. What this means is the radio site does not act as a repeater; the radio site has a transmitter on the Base frequency and a separate receiver on the Mobile which are not linked locally. The audio from the Mobile receiver is sent over the DGS microwave network to an audio switch. The Base transmitter receives its audio from this same switch also. This is an advanced setup where the audio switch can be controlled to repeat the Mobile audio back to the Base transmitter by splitting the audio path off. Dispatchers have this ability to enable splitting the Mobile audio path and sending it back to the Base radio at the site. In these situations because of the round-trip time it takes for the audio to be switched there can be delays causing rough audio. Often this is why a normally Mobile repeated Base will cease retransmitting Mobile audio. Also, CHP Dispatchers have the ability to see which site the unit was received from. They can choose to just transmit at that site (e.g., what's common for the Blue) or through the whole network.
The audio switch not only has access to CHP but other agencies also. Since you're dealing with audio paths they can be combined and split in various manners."
I re-read it like 3 times, but it just sounds confusing. I mean I thought I knew my radio scanner stuff but this is odd. I think I understand it for the most part, that it's not a normal repeater system, and it uses microwaves, but what's the point of doing all this in the first place and not just using a normal repeater?