APX CPS Question with Advanced Digital Privacy (ADP)

[ryan3294]

Hey everyone. I have an APX7000 and the newest version of the APX CPS programming software. I'm relatively new to the APX and CPS software, having them for just over a year or so. I've managed to figure out the basics of programming and have successfully programmed my APX with the various banks and things that I needed. I'm only programming conventional frequencies, no trunking or digital communications (P25, APCO, etc). I am currently trying to figure out how to encrypt a few conventional frequencies using Advanced Digital Privacy (ADP) function, or even the "Hardware" fucntion if that works. I'm not having any luck in figuring it out and am looking for some guidance. Can a basic conventional frequency even be encrypted without using a trunked, or digital system? I do know that the recieivjg radio would obviously alos have to have the encryption keys loaded so each can understand each other but having trouble just getting one radio programmed to start the process. Any feedback would be greatly appreciated.
-Ryan

 

[michaelstephen]

Hi Ryan - it has to be digital p25 to be encrypted. It can still be conventional (not trunked) - but needs to be astro25 digital, then the adp settings will show up. You can keep it very simple and use the default NACs and default talkgroups. Change the tx type to astro and the rx type to astro or mixed mode.


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[MTS2000des]

To use hardware encryption, your radio's MACE has to be flashed for a hardware algorithm(s) such as AES-256, AES-GCM, etc. ADP can also exist as a hardware algorithm. You would also need a KVL to load the hardware keys.

As was advised, ADP software encryption (single key) is standard on the APX. Just enable it and strap a conventional mode/channel to select or secure. Ensure the key and key ID match on all radios and you should be good to go.

 

[ryan3294]

Thanks. By saying it has to be P25 digital, does that mean the repeater has to be digital/digital capable or just settings in the radio and it will work with a regular repeater?

 

[michaelstephen]

The regular repeater can still carry the audio, but it will probably annoy anyone listening ... Because it will sound like loud digital modems back and fourth. The repeater doesn't know the difference between that type of audio or clear voice. As long as the PLs are correct it will carry the audio, and the decoding of both the digital p25 signal and the ADP will happen by the receiving radio. Thats why setting the RX type to "mixed mode" is nice, because the radio will decode p25 or analog voice ... That way you'd hear either one that is used on the repeater. For tx, you have to pick one or the other. Its just nice to monitor the channel for either type.


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[grem467]

Non p25 repeaters will not pass the signal without destroying it and making it undecodable. Furthermore there is no way to set a pl in digital mode anyway. You need a p25 capable repeater to operate in repeated digital mode

 

[michaelstephen]

@grem467 you might be right. In that case, the repeater I'm thinking of can handle both - or the owner has a conventional repeater on the same freq pair. It was my understanding the repeaters can pass digital encoding just the same as voice - I guess if there is some post-processing, then it would get ruined as you say.


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[ryan3294]

Good info. Thanks guys


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[ryan3294]

The main thing is that I figured out how to program it and have it all set up in it's own bank.


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