Eric I was just relaying what I was told (by a gov radio tech) about how the repeater handels encrypted communications. It just passes audio straight through be it encrypted or analog. That way someone at the repeater site can not eavesdrop on the secure communications going through the repeater. At least that is the way it was explained to me and that is how I understood it. The extra cards and such just handle keying functions and encoding I believe.
Eric Lemmon wrote: > Tom, > > Judging from the modules that are in the unified chassis, it appears that > the station is a standard DVP (Digital Voice Protection) repeater. The SP71 > merely means that it was manufactured to operate in the 440-450 MHz band. > All of the modules I would expect to be in a DVP station that can encode > and/or decode encrypted signals are present, those being the Voice > Protection, Code Detect, Code Processor, 4F DVP Control, and the F2 DVP > Control modules. The Line Interface, Squelch Gate, and Timeout Timer > modules would normally be installed in the three vacant slots, left to > right. > > I have several VHF DVP Micor repeaters that were removed from US Government > service in the 138 MHz band, and am quite familiar with their operation. > > 73, Eric Lemmon WB6FLY > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Thomas Oliver > Sent: Friday, January 08, 2010 8:28 AM > To: [email protected] > Subject: Re: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham > band > > > > It is DES capable meaning you can transmit encrypted communications > through it. It does not encrypt transmissions it only passes what it > hears. I believe that is the way it works. Should be easily converted > back to standard Micor. > > tom > > wd8chl wrote: > >> Skip wrote: >> >> >>> WD6AWP just found this on ebay... it's not my auction and >>> I know nothing about it other that what the auction shows. >>> It's just too amazing not to share. >>> >>> The auction is for an SP version of the UHF micor repeater which >>> was apparently never put in service and was shipped from Motorola >>> crystalled up in the HAM band with manuals documenting the mods from >>> standard production. >>> >>> A bit steep, but still ! >>> >>> >> I don't quite get the DES part...the DES they were using would not be >> legal on the ham bands...maybe they needed that option so they could run >> 9600 packet through it??? oh well, it's still interesting to see a >> Motorola (or GE for that matter) come from the factory on the ham bands. >> Neat. >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > >
