voice inversion

[scanfan03]

Does anyone know of any good software to decode voice inversion?

 

[INDY72]

Just to let you know that technically descrambling those comms is illegal.. this has been your PSA lol now that youve had the usual warning have fun...... lol

 

[GlacierClipper]

http://www.wpascanner.com/addons.htm

http://www.scanaustralia.bigpondhosting.com/software/software1.html

 

[KR4BD]

Years ago, you could easily buy black boxes for voice inversion scrambling for about $20. I still have one connected to an old Regency 10-channel xtal scanner. I was living in Ohio at the time (1970's), near Vandalia (N. of Dayton). Their PD was on 155.625 at the time. If a unit or dispatcher said "signal 54", you knew they were about to scramble. In all honesty, most of their traffic was "in the clear". Most of the scrambled stuff was a riot to listen to.... Often, it was inappropriate communications like the dispatcher asking a unit to pick up two cheeseburgers at MacDonalds for her.... Or that she would be "away from the radio" for a few minutes...

 

[INDY72]

Also if you have the cash there are two scanners on ebay right now that already have the software built in for descrambling inversion.. one of which is an export only not for US model but on ebay.. everything goes eh?

 

[GlacierClipper]

Some of those old scramblers are still in place in parts of the USA. In Minnesota it was 10-41 A and 10-41B.

 

[INDY72]

In Concordia Parish LA.. Go up...Pike County MS go 10-S.....On the old radios for MBN Go blue... but now MBN has true encryption on thier radios.

 

[Mick]

Speech Inversion Descramblers:
http://ctpdescramblers.com/

 

[scanfan03]

Just to let you know that technically descrambling those comms is illegal.. this has been your PSA lol now that youve had the usual warning have fun...... lol

Yup I know, but it's my own company's radios.

 

[scanfan03]

http://www.wpascanner.com/addons.htm

http://www.scanaustralia.bigpondhosting.com/software/software1.html

Thanks for the links, I've already tried those software, but they havn't worked for me. Do I have to use the discriminator tap on them?

 

[Thunderbolt]

Here in Michigan, it varied with each agency and what their policy was on using them. However, those that had them did make good use of this technology.


EMTS Ambulance: 10-90
Escanaba City Police: "Go to Code"
EMU Police: Code 7
Monroe County Sheriff: 10-90
Pontiac City Police: "Ch-3"
Ypsilanti City Police: Code 7

73's

Ron

 

[scannerfreak]

http://www.wpascanner.com/addons.htm

http://www.scanaustralia.bigpondhosting.com/software/software1.html

Thanks for the links, I've already tried those software, but they havn't worked for me. Do I have to use the discriminator tap on them?

Yes, most of them do require discriminator taps.

 

[cellblock776]

Hammond, Louisiana Police Department used to use Speech Inversion on it's detective channel from time to time many years ago. I used to monitor their channels quite a bit since my father was a Detective with them. Not sure if they still use it.
A couple of months back I posted about hearing Ascension Parish Sheriff's Office testing Speech Inversion on a talkgroup on it's Motorola TRS.

 

[n8gni]

Speech Inversion

I used SSB on most I heard. Some USB and some LSB.
Of course you would need a radio that had sideband, I used an AOR 3000a.
I now have an Alinco DJ-X2000e that has a descrambler built in, I've never tried it cause I never hear any Inversion anymore!

 

[Voyager]

Yes, most of them do require discriminator taps.

That's odd. You shouldn't need a discriminator tap since most of them are only dealing with the audio portion of the spectrum (300-3000 Hz), and invert around 2700-3300 Hz or so. A discriminator tap should not be necessary.

Joe M.