Re: mystry signal

Paul Butzi (W7PFB)

When I look at the first image I see a signal that runs from 2380 Hz to about 2850 Hz.  That would be 470 Hz wide, not 5KHz.

Second image, same sort of signal from maybe 1375 thru 1860, again roughly 485 Hz wide.

I’m also seeing what look like psk traces which sort of confirms that bandwidth estimate based on relative scale.

It looks like some sort of multiple frequency shift keyed signal, four tones.  If we knew the time scale in the image you could probably estimate the symbol rate.

Based on the repeated pattern I am taking a WAG and suggesting some sort of ALE?

-p W7PFB
73, Don’t forget to smile and have fun!

On Oct 26, 2020, at 9:45 AM, Randy True <w4rttrandy@...> wrote:

The program is called Spectrum Lab. Been around for a while.
Looks to be roughly 5kc wide.

Randy W4RTT

From: <> on behalf of Milton Garb via <n6mg@...>
Sent: Monday, October 26, 2020 10:10 AM
To: <>
Subject: Re: [070Club] mystry signal
You're going to get all kinds of replies to your question...hi hi...You might think about using your 250 Cycle B__ S___ filter!
I'm not familiar with that waterfall. May I ask what software it is?
You said, 14068-69. May I ask the width of the signal?
LONP #76

-----Original Message-----
From: Randy True <w4rttrandy@...>
To: <>
Sent: Mon, Oct 26, 2020 12:13 am
Subject: [070Club] mystry signal

Anyone ID this signal? Been showing up around 14.068-69.

Randy W4RTT

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