Another CHP question - explain how this happens!

[gmclam]

I'm just north of you (Hazel/Greenback) and all I've found on the extender ch from here is North Sac units, corresponding to the Gold.
When you hear the extender in question, are you hearing id's for 46 units, or 112 units or 107? or others?

Normally, when I hear extender traffic, I also hear the 'original' traffic on the associated CHP channel (typically Gold, Blue, Black or Green; in that order). But I am asking about this condition where I get extender traffic and do not pick up the original signal.

It happened briefly over the past 3 days; nothing on any other CHP frequency, but traffic on extender; and I heard a call dispatched to 'Truxel Road'. That would normally be Gold channel traffic. I do not typically pay attention to unit numbers (I listen to waaaay too much and that kind of info just is not useful to me).

The next time this happens I'll try the UHF channels, and I'll try and pay as much attention as possible to the extender. I've already got it connected to a PC, so perhaps I'll just record the extender traffic.

Thanks

 

[inigo88]

I do not typically pay attention to unit numbers (I listen to waaaay too much and that kind of info just is not useful to me).

Of course it's useful! It tells you which channel you're listening to without looking at the screen.

Or in this case, it will tell you which low band frequency the radio traffic SHOULD be on. In which case, maybe the dispatcher is using a far away fixed base transmitter site... try turning the squelch all the way down?

 

[ddemmers]

Hi,
although I am very new to this forum, I would like to chime in here since I spend a great deal of time listening to chp in the fresno area. I commute to work along the 99 corridor and I can confirm gmclam's frustration. Not sure what is happening but I can either hear the base frequency or I can hear the extender frequency. Never both!

 

[gmclam]

Of course it's useful! It tells you which channel you're listening to without looking at the screen.

Like I wrote, I listen to waaay too many agencies to keep track of things that way. When it comes to local CHP I recognize the channel by the dispatcher's voice (even though the dispatchers play musical chairs each day), the names of the streets and the general 'sound' of the channel.

Or in this case, it will tell you which low band frequency the radio traffic SHOULD be on. In which case, maybe the dispatcher is using a far away fixed base transmitter site... try turning the squelch all the way down?

I scanned all CHP frequencies with the squelch open and CT not required and got nothing .. all while the extender was chatting away on another scanner connected to the same antenna. I even did a low band search (using the scanner's search function) in case of a new unknown frequency.

Next step is checking the UHF frequencies, and then the DOJ frequencies. I have a couple more ideas if that doesn't work.

 

[avtarsingh]

easiest way to tell where they are is from the unit numbers

1st time dispatcher calls out a unit you will know where they are

some of them make sense without even having to remember them

truckee is on I80 san andreas is on hwy 49

13-tahoe
35-oroville
39-williams
42-grass valley
43-yuba sutter
45-auburn
46-north sac
47-woodland
49-san andreas
61-sonora
62-stockton
70-gold run
80-truckee
94-amador
103-tracy
104-chico
112-south sac