Batboard

Ok, My local PD uses mostly kenwood radios while everyone else uses motorola. The PD recently had some kind of 'scramling' put into there kenwood radios. They only use it on the secendary repeater sometimes, not all the time and when they use it they say go to ch 16 instead of 5 wich is the same repeater just scramling on 16. What type of scramling is it please, and can I put it into my 1250?

thanks

2 questions come to mind

1) Why do you need to descramble your local PD

2) Are you authorized to do this if so why not ask the system manager for the info.

Descrambling a scrambled signal that you're not authorized to descramble is a felony.

Elroy

Elroy,

Thats quite a tongue twister

it's hard to answer your question when you're not really giving any useful information. at least tell us what the scrambled audio sounds like. could you sample a bit to a .wav etc?

does the scrambling sound like donald duck talking backwards? and is there a repeating "tick or fraction of a second data chirp in the audioevery second or two"?
if there is no tick, then it is mostlikely basic inversion scrambling. if there is a "tick" then it is an upgraded form of inversion called rolling code inversion, there are many companys out there that make the 2 types of boards you are wondering about.
if it is simple inversion then there are about 16 different mixing tones to choose from to decode using a inversion scrambler, fairly simple. if the "tick" is present, then you have many thousands of codes, because every time it "ticks" it is changing that mixing tone, making it very hard to hear. i have never tried this but wonder if a regular inversion descrambler listening to a rolling code scrambled signal would still beable to hear most of it, just the pitch of the voices would change drastically?
your ht1250 is capable of a plug in scrambler or rolling code scrambler, somewhat easy to use but i have not tried it.
if you look in MRT radio mag you will find 2 or 3 companys that make such boards.

Hmmmmm

Kenwood Crap.

Probably some form of speech inversion.

Kenwoods usually wont support the higher teer
encryption modules.

Batman