[600MRG] Mark - Space Frequencies / Frequency Spread((3)

[John Langridge]

Frank,
I can answer #3.  Typically dial freq is the same as WSPR, 474.2.  The carrier freq is usually around 1100 hz to 1400hz, give or that.. the nice thing about the big waterfall is that even outside that window, signals can be decoded.
hope that helps.
73!
XIQ

      From: Frank Lotito <k3dz at live.com>
 To: 600 / 630 Meter Group <600mrg at w7ekb.com>; Lowfer Bulletin Board <lowfer at mailman.qth.net> 
 Sent: Thursday, April 23, 2015 1:18 PM
 Subject: [600MRG] Mark - Space Frequencies / Frequency Spread((3)
   



Can one or more members refer me to authoritative sources detailing or discussing the following information:
(1) For 490 and 518 KHz Navtex, what are the actual transmitted "mark" and "space" frequencies? (Of course, the difference of these two frequencies is 170 Hz.)
(2) For HF Sitor-B transmissions cited by NOAA, what are the transmitted mark and space frequencies? For example, the US frequencies cited on the following URL http://www.nws.noaa.gov/om/marine/hfsitor.htm
(3) For 630 meter experimental stations, what are the upper and lower frequencies of the sub-band commonly used for WSPR and JT-9 transmissions?
I am not interested in what frequencies you specifically "dial in" on your receiver / transceiver system.  
73 Frank K3DZ / WH2XHA
                         
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