[Heathkit] 28.635 Sig rept using spectrum display

[Gregory W. Moore]

GE er GM, All.

Hr flws sig rept 28.635Khz,

Time 0508Z (0008R) 4 JAN 2005

Sig recieved on Icom IC-746PRO, equipped with high stability crystal 
freq standard, fed from GAP Titan DX vertical.

Sig taken in USB position after verfifying zero beat in CW of 28.635KHz.

Lvl approx S6-7.

I then applied sig to MixW program, expanded waterfall to X5 scale, and 
used CW mode to get a single cursor I could work with.  This signal 
looks like, or very similar to, a carrier tonepack, or a telemetry trace 
of some sort.

The signal is composed of  14 discrete tones, all frequency modulated to 
some degree, but most constant.
the frequencies are:
436.0 Hz
705.0 Hz
776.0 Hz
805.0 Hz
831.0 Hz
909.0 Hz
993.0 Hz
1187.0 Hz
1227.0 Hz
1274.0 Hz
1348.0 Hz
1772.0 Hz
1816.0 Hz
2000.0 Hz

The 1348 Hz signal was frequency modulated in a slow  digital pattern 
and also amplitude modulated in a slow digital pattern
which did not correspond to Morse, Baudot, ASCII, or any other pattern I 
could pick off the top of my head.   The FM
is 24 Hz shift, from 1361 Hz to 1336 Hz. I didn't take the time to 
measure the amplitude excursions, I wanted to get this posted, because 
I',m getting kind of tired --hi--...

I made no attempt to make these numbers work out. I eyeballed the center 
freq of each waterfall trace, as well as the edges of the FM modulation 
of the 1348 Hz trace.  It was only after I looked at all the numbers did 
I realize that they all were exact freqs, I.E. no decimal frequencies, 
and I was extremely suprised to find the exact 25 Hz FM deviation on the 
1348 Hz trace.

Given these results I have reasonably high confidence in my findings, 
and that they are correct.  I will continue to monitor this freq 
tomorrow and see if I can't make some kind of sense out of this.  I am 
reasonably certain that I am seeing a carrier tonepack, or a telemetry 
tonepack.  When I first was looking at the traces, One of them (I forget 
which now) seemed to be FM modulated as a time reference, as the 
deviation was all one direction (center downward) and at regular 
squarewave like intervals.  This particular trace ceased the behavior 
when I got around to expanding the waterfall (naturally) but I am 
determined to track this thing down and get a handle on it.  It doesn't 
sound like any 16 channel tonepack with which I am familiar, nor any 
telemetry with which I am familiar, (Yup, I've heard ans 'scoped  a lot 
of them, most of which I still can't talk about),  but heck, this is the 
21st century--hi--

Thanks to this group for a wonderful mystery!!  Sometimes you have to 
get off the MARS nets, or chasing CW DX all nite, and solve these things 
(if they can be solved). Since I am retired disabled, I have all the 
time in the world to pick around at this enigma.

Hr fols my QRZ.com info for those plotting the sig repts:
QSL Mgr: 	Buro
Coordinates: 	39.956267     -75.274357
County: 	Delaware
Grid: 	FM29iw
Area Code: 	610
GMT Offset: 	-5
Time Zone: 	Eastern
Has DST?: 	Y
Birthday: 	02 Jun 1947
QRZ Updated: 	2003-06-27 12:52:12


73 de Greg "GW" Moore WA3IVX/ NNN0BVN

-- 

Happily turning electricity into RF energy for almost 40 years,
on land, sea and air, professional and amateur,
around the clock and around the world. KEEP CW ALIVE! 
Become an Elmer today!!!

"All that is necessary for the triumph of evil is that good men do nothing."
                                                   --Edmund Burke
Greg Moore NNN0BVN PA
U.S. Navy-Marine Corps Military Affiliate Radio System (MARS)
Official Pennsylvania Area Website:
http://pages.prodigy.net/nnn0fbk/mars.htm
Official Northeast Area Website:
http://www.navymars.org/northeast/index.htm
Navy-Marine Corps MARS: Proudly Serving Those Who Serve."
E-Mail (MARS) nnn0bvn at navymars.org
E-Mail (ARRL) wa3ivx at arrl.net
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