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Author Topic: 2.000 MHz, USB, digital data, in the TX maybe AR and LA area  (Read 1347 times)

Offline SW-J

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2.000 MHz, USB, digital data, in the TX maybe AR and LA area
« on: December 13, 2011, 0344 UTC »
Just noticed it tonight ... strong signals into DFW area ...

No idea what system or service these transmissions are associated with, but, the spectrum is normally marine.

Also, using Spectran, the following characteristics were noted:

Occupied BW: 650 Hz .. 2850 Hz  (Rcvr IF BW set for 3 kHz, Rcv freq = 2.000 MHz)

Startup (training sequence) carriers:

790 1090 1160 1460 1760 1840 2130 2430 2510 2810

OFDM data carriers every 60 Hz (yeah, I know: line rate) or so ...


« Last Edit: December 13, 2011, 0347 UTC by SW-J »
o Icom IC-756ProII, ProIII, Alinco DX-70, Kenwood TS-680s
o WinRadio G303e, Degen/Kaito 1103/DE1103, Stoddart NM-25
o 1/2 wave 80m Dipole used with several tuners
o Tuned loops from 2' thru 16' diam. capable of 160m thru 10m

Offline Throbbing Gristle

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Re: 2.000 MHz, USB, digital data, in the TX maybe AR and LA area
« Reply #1 on: December 13, 2011, 0430 UTC »
Also heard here north of DFW on my Degen portable using whip ant. 

Offline SW-J

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Re: 2.000 MHz, USB, digital data, in the TX maybe AR and LA area
« Reply #2 on: December 13, 2011, 1645 UTC »
Also heard here north of DFW on my Degen portable using whip ant.  

Noted it was absent about the 6:50 AM CST time frame in the morning ... maybe more distant than TX or LA or AR?


Should also add: heard several brief 'carriers' maybe a 1 kHz tone modulating a SSB transmitter, in that same range while listening to this 'service' ... kind of unusual for a service, indicates that maybe radio engineering personnel or technicians are on-site performing some testing, maybe an antenna testing, so, maybe this is something under development or newly installed?

Began working some 160 Meters starting mid-summer this year on the high end and this has been the first time I really noticed this 'service' ... anybody have more info chime in!

There is this regards Part 80 Maritime Services from the FCC:

http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?TITLE=47&PART=80&SECTION=373&TYPE=TEXT


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« Last Edit: December 13, 2011, 1659 UTC by SW-J »
o Icom IC-756ProII, ProIII, Alinco DX-70, Kenwood TS-680s
o WinRadio G303e, Degen/Kaito 1103/DE1103, Stoddart NM-25
o 1/2 wave 80m Dipole used with several tuners
o Tuned loops from 2' thru 16' diam. capable of 160m thru 10m