Adcr25 nxdn with a known key

[moj]

Hi Guy's !

Sorry for bringing up an old subject and topic but when looking through the Adcr25 software there's also an nxdn and p25 key section where you can enter your own scramble keys etc , but looking through the instruction manual that andr posted it doesnt show how to use this feature at all ??

Obviously the dmr section is easy to understand to enter a key but the nxdn and p25 doesn't seem to work for me at all.

By any chance did anybody get this function working on there board or am i not doing something correctly ??


thanks Anthony .....

 

[racingfan360]

Hi Anthony. I don't recall ADCR25 advertising any P25 functionality beyond protocol decoding and trunk tracking.
NXDN (4800 and 9600) descrambling with known key was added in FW5.8, MotoTRBO BP autodetect in FW5.9. I tested all of these and got them to work ok.

 

[moj]

Thanks for the reply Racingfan , at the top of the software it says p25 decrypt 55 bit hex key on version 5,10 software , and how did you get the nxdn function to work on your board, the only other reciever where i have seen this work was on a aor dv1 ?

 

[racingfan360]

I hadn't noticed the P25 Key entry before. I can't test it, but it seems to accept an entry to it ok.
For NXDN, connect the receiver, open the software. Click on the Decrypt button. There's an 8x8 matrix for NXDN key entry. Enter the key in Decimal format (1-32767) in the relevent KeyID position: For KeyID=0 that's the first box, for KeyID=63 it's the last one. Press Store to save it to the hardware. When a scrambled signal is received it will use the key stored at that KeyID position in the matrix.

The AOR DV1, DV10, Icom R8600 and R30 work with NXDN scrambling.

 

[moj]

Hi Racingfan ,
i will give it a go , and i'm surprised that it was never explained at all on the online manual , fingers crossed tho and i will let you know the outcome

thanks again ....

 

[buddrousa]

When it was announced that this option was being worked on is when the designer went silent.

 

[racingfan360]

When it was announced that this option was being worked on is when the designer went silent.

I also assumed that might be the case, and wasn't just a co-incidence.

 

[03msc]

So am I deducing that these boards are no longer available? I was thinking one would be neat to have just for regular receiving, not for any decoding with key or whatever .

 

[Ubbe]

The Russian guy who made them even had to buy back some receiver boards from auction sites to have some himself as he had sold out all he produced. He also mentioned he was working on a better performing receiver with many more features, the ADCR25 are pretty bad as a receiver, but nothing came out of that.

He made an excellent multicoupler board and I wanted to buy a second one but he disappeared from social media, even before the Ukraine debacle, his webpage are dead and he doesn't respond to email and I believe he was developing some frequency hopping encrypted radio devices for the military that probably forced him to solely focus on that work. His HAM gear at his home in Moscow are still on air doing automatic distance coverage measurements so he or his family probably still lives there as they would have cut the power if he doesn't pay his electrical bills.

/Ubbe