RHOTHETA User Manual RT-800
Page 48 of 192
Fig. 23 Confirming of leaving the scan mode
o
Pressing the hotkey “Go to Result” (s. Fig. 22, 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.
6.2.2 Monitoring
The DF-system RT-800 can receive only one frequency at a given time. For simultaneous
surveillance of the emergency frequency and any other frequency/channel, this monitoring
function can be used.
Note
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, which depends 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 the 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.
6.2.5) 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. Fig. 24).
