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LF: ROS MF Data mode QRG 477.400 ? usb-dial

To: <[email protected]>
Subject: LF: ROS MF Data mode QRG 477.400 ? usb-dial
From: "Graham" <[email protected]>
Date: Sat, 16 Jun 2012 20:29:41 +0100
Cc: "Gary - G4WGT" <[email protected]>
Importance: Normal
Reply-to: [email protected]
Sender: [email protected]
The ROS-MF 2/7 is  a   100 Hz  b/w   MFSK  transmission   , and  would  fit  into the  top  200 Hz of the  477  band  , with   50 Hz  guard  band  , Opera /  Band edge ?
ROS  MF  Data  mode  is  100 Hz   wide  and  based  round    1500 Hz  (Fixed)  Audio  frequency , MF-7  and  MF-2   share the  same   1500 Hz
ROS   data  mode  requires a  conventional   SSB    tx  / exciter  (USB)  to  translate the  Tx  drive  audio  , or  can be  used  with a  SDR  Tx
ROS  MF-2   decodes  at approx  the  same  level  as  WSPR and is a  full  live keyboard  qso  mode  , MF-7 is  approx   7 dB less  sensitive , but  gives live  qso mode  , approx   14 dB  lower s/n  than  psk31 at similar  data  rate .
Note the  Opera and Ros   s/n   readings  are  calibrated to the  sim-path   propagation  modelling   software  and  are  approx    6 / 7  dB  less  than  wspr or  fldigi
Each  system  reports  the  Average   s/n   of the  complete   transmission
73 -G..
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