Rhotheta RT-500-M, Руководство пользователя

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RT-500-M
RHOTHETA Page 43 of 168 User Manual
Figure 29. Confirming of leaving the scan mode
o
Pressing the hotkey “Go to Result” (s. Figure 28, position 3) during the Cospas-Sarsat scan is
running, will terminate the scan mode, adopt the frequency which was found in this scan last
time and change to the “Bearing” page.
Pressing the hotkey “Go to Result” if the scan mode is not activated, will lead to the “Bearing”
page with the last result as the activated frequency.
This hotkey appears only if there is a result for this scan.
7.2.2 Monitoring
The DF-system RT-500-M can receive only one frequency at a given time. For simultaneous
surveillance of the emergency frequencies (especially MOB = man over board alert) and any other
frequencies/channels, this monitoring function can be used.
Note
The COSPAS-SARSAT frequencies cannot be set as the monitoring frequencies, but they still can be
used as the main bearing frequency.
Monitoring scan has two different modes of operation that depend on the main bearing frequency:
o
Monitoring (normal): the mode of operation with any main frequency that does not belong to
the COSPAS-SARSAT band.
o
Monitoring CP-SS: the mode of operation with a COSPAS-SARSAT frequency as the main
frequency.
This particular scan mode is convenient for a use case when the expected COSPAS-SARSAT
frequency of a particular emergency beacon is not known and should be determined.
If the exact COSPAS-SARSAT frequency is known, then using the “SAR scan” (s. 7.2.5) might
be a better choice for simultaneous surveillance of several frequencies.
The surveillance of up to five different frequencies (within the specified frequency bands) is possible:
o
One main bearing frequency
o
And four monitoring frequencies:
The emergency frequencies 121.500 MHz and 243.000 MHz are stored permanently in the
“Monitoring” algorithm.
Two more frequencies/channels can be set additionally in this scan (s. Figure 30).