FRS/GMRS voice scramble

[SCPD]

i bought some new frs/gmrs radios from radio shack model 21-1935 they say max range is 18 miles under perfect conditons but i know this has nothing to do with scanners but these frs/gmrs radios have voice scramble sounds like side band to me i was wandering what kind of scrambling that was i am sure its not digatal?

 

[KR4BD]

Most likely "voice inversion" scrambling. Some public service agencies use this method of scrambling. It is not difficult to "unscramble", in other words, not very secure.

 

[richster]

i bought some new frs/gmrs radios from radio shack model 21-1935 they say max range is 18 miles under perfect conditons but i know this has nothing to do with scanners but these frs/gmrs radios have voice scramble sounds like side band to me i was wandering what kind of scrambling that was i am sure its not digatal?

That would be voice inversion. I tried to find you a link on the WIKI about how it works, but there isn't one. Here is a link to a thread where they are talking about inversion on a FRS radio.

http://www.radioreference.com/forums/showthread.php?t=36276&highlight=voice+inversion

Also, search the forums for more discussions on voice inversion. There have been many through out the years.

Regards,
Richster.

 

[LarrySC]

I have 2 of the old DRE inversion de-code units. R/S use to sell portable phones with that mode. I guess I will have to hook them back up for FRS/GMRS. The Anderson Co sheriffs office use that mode 30 years ago until they found out you could de-code for $29.95 and a 9v battery.