RT-500-M
RHOTHETA
Page 44 of 168
User Manual
Designation of the currently active scan mode
Main bearing frequency (currently active)
Monitoring frequencies
Figure 30. “Monitoring” mode. Indication of frequencies.
If the Monitoring (normal) function is activated, the DF system switches alternating from the main
bearing frequency to the selected monitoring scanning frequencies (s. 7.2.2.1).
The currently monitored frequency is displayed highlighted in green, so you can see, which frequency
is active at a given moment (s. Figure 30).
A frequency will be monitored for 3 seconds if ELT/PLB is not activated, and 10 seconds if ELT/PLB is
activated.
If a signal is received during monitoring, the bearing value is indicated on the “Bearing” page for 30
seconds.
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In order to interrupt the current reception, press the “ESC” button. The system will continue
with the next monitoring frequency.
Active reception will be interrupted after 30 seconds for a short moment in order to examine the other
monitoring frequencies (safety function). This behavior can be changed under “Monitoring Settings” (s.
7.2.2.4, “Edit Scan” hotkey-description).
If the signal was lost during the monitoring procedure, the scanning process continues with the next
frequency/channel after 30 seconds (depending on the settings of the bearing indication time and how
many seconds (e.g. of 30 s - period) have already elapsed until the signal was interrupted).
Monitoring” On
Active frequency:
Main frequency = 131.510 MHz
Signal is received
“Monitoring” On
Active frequency:
Main frequency = 131.510 MHz
Signal has just interrupted
“Monitoring” On
Active frequency:
Monitoring frequency = 121.500 MHz
Signal is not present
Figure 31. “Monitoring” mode. Example views of the “Bearing” page
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If at some point of scanning procedure the signal on the desired frequency is received, and
monitoring of other frequencies is not desired anymore, press the “OK” button. The frequency,
that receives a valid signal at the moment of pressing the “OK” button, will be adopted as the
main frequency, and the system will change to a normal bearing mode.
