New CHP Extender Channel Assignments

[B]

That's why it's called fishing and not catching! Appreciate the work you do...

 

[scannerboy02]

I hate to throw a wrench in the works, but CHP South Lake Tahoe EV-20 extenders are using EE4 NAC. All of the other areas I've heard have been using EE6 NAC. I'm inclined to change all the EV-20 extender freqs back to open tone in the DB for now...

I have no particular information to support this but is it ~possible~ they are using the different NACs as a kind of 'primary' and 'alternate' steering, like they had with the CPVE setup?

 

[officer_415]

I have no particular information to support this but is it ~possible~ they are using the different NACs as a kind of 'primary' and 'alternate' steering, like they had with the CPVE setup?

In both systems, the portable radio uses different NACs to "steer" the extender to different mobile channels (i.e. Ch 1 car-to-station, or Ch 2 car-to-car on the base frequency). The "alternate" VRS freq ended up being used as the EV-20 freq for each area.

I believe the portables are programmed for F7E (open NAC) receive on the EV-20 system, so maybe listing the EV-20 freqs with no tone in the DB is the right thing to do in any case. I'm just confused...EE6 everywhere, and then of course I come across EE4.

 

[scannerboy02]

In both systems, the portable radio uses different NACs to "steer" the extender to different mobile channels (i.e. Ch 1 car-to-station, or Ch 2 car-to-car on the base frequency). The "alternate" VRS freq ended up being used as the EV-20 freq for each area.

I believe the portables are programmed for F7E (open NAC) receive on the EV-20 system, so maybe listing the EV-20 freqs with no tone in the DB is the right thing to do in any case. I'm just confused...EE6 everywhere, and then of course I come across EE4.

I'm almost wondering if this was a programming error, it is a little strange.

Also, is the beaconing being observed in all areas?

 

[officer_415]

Also, is the beaconing being observed in all areas?

You mean the ED6 data bursts?

 

[Radiobern]

Aqua (Hayward) EV-20 using 769.94375 with a voice NAC of EE6

 

[radioopperator]

Are they running any encryption over the extenders? My bcd325p2 wont hear crap from EL Centro through Winter haven?

 

[officer_415]

Are they running any encryption over the extenders? My bcd325p2 wont hear crap from EL Centro through Winter haven?

No, but you have to be very close to a CHP unit to hear it, and it's usually only active when the officer is out of the car.

 

[hayesguziejka]

CHP Riverside was working a fatal and I picked up both Extenders.
CPVE 769.44375 NAC: DB3
EV-20 769.71875 NAC: EE6

 

[radio10-8]

So 154.905 mobile extenders won't work anymore?

 

[officer_415]

So 154.905 mobile extenders won't work anymore?

They've been gone for years.

 

[nokones]

So 154.905 mobile extenders won't work anymore?

I think it's been almost 16-17 years now since 154.905 MHz hasn't been used for the Extenders since the implementation of the CPVE system. I don't recall what they did initially for the Motor Units after CPVE was implemented for the cars and trucks.

 

[radioopperator]

154.905 was patched to fire channels last year in San Diego during fires and is used on special occasions its not dead.

 

[ladn]

I still have it on some of my radios, but I haven't heard anything on it for years here is SoCal and Owens Valley.

I'm not surprised, though, that it still gets some sporadic usage.

 

[AM909]

Geoff Fors' site suggests 2010 +/- a couple years. There were a bunch of those MPS radios that were surplused out, so I imagine there was some other usage out there, legal or not.

 

[officer_415]

I think it's been almost 16-17 years now since 154.905 MHz hasn't been used for the Extenders since the implementation of the CPVE system. I don't recall what they did initially for the Motor Units after CPVE was implemented for the cars and trucks.

There were still some 154.905 extenders in service until around 2018. The newer motors have a Pyramid VRS that uses 774.53125 simplex.

 

[nokones]

Geoff Fors' site suggests 2010 +/- a couple years. There were a bunch of those MPS radios that were surplused out, so I imagine there was some other usage out there, legal or not.

The entire MPS' came off the CHP equipment inventory way back in the 90s and where replaced with the HT1000s

 

[officer_415]

The entire MPS' came off the CHP equipment inventory way back in the 90s and where replaced with the HT1000s

I'm sure the HT1000s have been surplused too. Even the EF Johnson portables that rolled out with the CPVE have been replaced by APX8000s.

 

[nokones]

I'm sure the HT1000s have been surplused too. Even the EF Johnson portables that rolled out with the CPVE have been replaced by APX8000s.

No doubt.