CHP 700MHz Extenders

[K6GBW]

Has anyone programmed the 769.000 extender frequencies? If so, what kind of range to they have? Back in the day I used to listen to 154.905 and in the L.A. area there are so many cars within a few miles you could hear a LOT of CHP traffic. It also kind of told you when a CHP was nearby. I programmed in the 700MHz extender frequencies with the proper NAC codes into my APX as receive only channels. So far I have yet to hear a peep on them. Just want to see if anyone has any information.

 

[d119]

New CHP Extender Channel Assignments

CHP has begun rolling out vehicles with a new radio/lighting/computer system called EV-20. These vehicles will gradually replace the older vehicles, which are equipped with a system called CPVE. The 700 MHz extenders associated with the EV-20 system are using the same VRS channels 1-16 as the...

forums.radioreference.com

 

[K6GBW]

Thanks for the link. I guess the range of the 700 MHz extenders is just too short to really be all that useful.

 

[f40ph]

Program all of the extender channels with NAC F7E so you receive any P25 transmission. This will also help bridge the timeframe between old and new extenders. I listen while driving and hear them come and go as you would expect. No need to program specific NAC codes as you would want to hear any P25 transmission on those freqs.

 

[K6GBW]

Program all of the extender channels with NAC F7E so you receive any P25 transmission. This will also help bridge the timeframe between old and new extenders. I listen while driving and hear them come and go as you would expect. No need to program specific NAC codes as you would want to hear any P25 transmission on those freqs.

That is an excellent idea. I forgot I can do that. Thanks!

 

[nd5y]

I guess the range of the 700 MHz extenders is just too short to really be all that useful.

People report about getting about a mile range using the 1 watt 900 MHz digital spread spectrum hand held radios. A 700 MHz extedender probably runs 2 W into a vehicle roof mount antenna. If you have a decent receiver and antenna you should be able to receive them at least that far.

 

[gmclam]

I have them all programmed and set the NAC to Search so I'll get whatever comes my way. I live near a major intersection and always picking up something that's coming in on another radio (I run multiple receivers simultaneously). When out on the highway, it is often very effective that I am near an incident/vehicle stop or even just a parked cruiser. Even if the signal is encrypted, it works for me.

 

[AM909]

People report about getting about a mile range using the 1 watt 900 MHz digital spread spectrum hand held radios. A 700 MHz extedender probably runs 2 W into a vehicle roof mount antenna. If you have a decent receiver and antenna you should be able to receive them at least that far.

IIRC, they're designed for very short range, like a few car lengths. Weren't the old VHF extenders in the 100 mW range? I'd expect even less at 700 MHz.