OmniSTAR 5220HP, Руководство пользователя

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OmniSTAR 5220HP User Manual
Issue 1.32 12/2010
48
$JFREQ
This message allows you to either manually or automatically tune
the OmniSTAR receiver.
Note however, that this command only becomes effective
after the lock to the OmniSTAR satellite is lost.
This could be done in the following way: Power-off the
receiver, then disconnect the antenna and power-up the
receiver for a few minutes.
The next time the receiver is powered up with the antenna
connected the frequency-change will become effective.
This command has the following layout:
$JFREQ,freq,baud<CR><LF>
Where “freq” is the frequency in kHz and “baud” is the symbol rate
(600, 1200 or 2400 baud)
Entering a valid frequency and symbol rate will manually tune the
receiver. Table 1 provides frequency information for the OmniSTAR
satellites. For example, the command to tune the receiver to
EUSAT:
$JFREQ,1537440,1200<CR><LF>
The receiver will reply with the following response:
$>
Entering a frequency of zero with no associated symbol rate will
place the OmniSTAR engine into automatic mode.
To set the receiver in automatic mode, send the following message:
$JFREQ,0<CR><LF>
The receiver will reply with the following response:
$>
Coverage Area Frequency Mhz Longitude Satellite Baud
Europe, Africa
1537.4400 25 East EUSAT 1200
India, Middle East 1535.1575 64.5 East IORH 600
Iceland, Canaries, Atlantic 1535.1250 25 West AOREH 600
South-East Asia, Japan 1535.1375 109 East APSAT 1200
M/S-America, Alaska 1535.1375 98 West AMSAT 1200
Eastern U.S. 1557.8450 101 West MSV-EN 1200
Central U.S.
1557.8350 101 West MSV-CN 1200
Western U.S
1557.8550 101 West MSV-WN 1200
Australia
1535.1850 144 East OCSAT 1200
Table 4: OmniSTAR beams worldwide