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Sacramento Valley Area Discussion - Local area specific discussion for Sacramento County and its outlying areas such as San Joaquin and Stanislaus Counties.

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Old 10-31-2014, 5:09 PM
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Default 160.935 Inversion Scrambler?

I am copying somebody using AAR Channel 55 160.935 with an 186.2 Hz tone from here in Downtown Sacramento. The nearest license is Richmond Pacific RR in Richmond. ULS only show Richmond and LA/San Diego licenses. Any ideas? I do not have the descrambler to hear the actual traffic.

B.......
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Old 11-06-2014, 9:15 AM
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UPRR & Amtrak police maybe?
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Old 11-07-2014, 10:27 PM
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Try downloading a program called INVERT.EXE. you can use your soundcard to decide it.
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Old 11-08-2014, 4:27 PM
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You sure it is inversion and not NXDN? The railroads have started to use it in yards, shops, police.
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Old 11-08-2014, 7:56 PM
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Quote:
Originally Posted by kma371 View Post
Try downloading a program called INVERT.EXE. you can use your soundcard to decide it.
Where is a safe source of the program?

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Old 11-09-2014, 5:00 PM
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Try downloading a program called INVERT.EXE. you can use your soundcard to decide it.
Do you run the audio from your radio into the mic jack on your pc/ laptop or what? I'd like to give it a shot with my Gre 600.

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Old 11-09-2014, 7:40 PM
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Originally Posted by gewecke View Post
Do you run the audio from your radio into the mic jack on your pc/ laptop or what? I'd like to give it a shot with my Gre 600.

73,
n9zas
I think I use the line in.

I don't use it that often so I don't remember exactly.
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Old 11-09-2014, 7:40 PM
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Where is a safe source of the program?

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I'll try and zip the file later and attach it to thread. Not home at the moment.
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Old 11-09-2014, 8:13 PM
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I have an inversion card on my AOR -- Guess I should get it out of storage.... someday
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Old 11-10-2014, 12:09 AM
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I'll try and zip the file later and attach it to thread. Not home at the moment.
I tried to link it here, but the website is no longer valid. If you search around you will find it. I can't find it on my computer at the moment.
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Old 11-10-2014, 11:15 PM
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Quote:
Originally Posted by Bruce42 View Post
I am copying somebody using AAR Channel 55 160.935 with an 186.2 Hz tone from here in Downtown Sacramento. The nearest license is Richmond Pacific RR in Richmond. ULS only show Richmond and LA/San Diego licenses. Any ideas? I do not have the descrambler to hear the actual traffic.

B.......
I know you're inland quite a way, but for what it's worth, back when I lived in the SF Bay area, much of the time I heard voice-inversion or time domain secure voice it turned out to be fishing fleets off the Pacific coast using clear/encrypted voice all over the 138-174MHz spectrum.
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Old 11-11-2014, 7:40 PM
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Quote:
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I think I use the line in.

I don't use it that often so I don't remember exactly.
Thanks, I'll play with it a little.

73,
n9zas
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Old 11-22-2014, 9:32 PM
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The decoding process is easy since it's meant to use voice-band audio (versus baseband). Scanner headphone out to line-in or mic.

Prog attached.
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File Type: zip inversion.zip (89.4 KB, 59 views)
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