RHOTHETA User Manual RT-800
Page 59 of 192
o
Pressing the hotkey “Default SNR” (s. Fig. 37, position 5) will set the SNR value of the
currently marked frequency to the default value, which can be defined on the “Setup”
page (s. 6.4.3.13).
o
Pressing the hotkey “ID only” (s. Fig. 37, position 6) activates or deactivates the feature
“ID Only” with two possible settings:
▪
“
Beep Tone”:
Alarm is only triggered if an audio tone in the valid range (configured via Setup, s.
6.4.3.6) has been detected. Else the bearing is suppressed.
▪
“--“
: Alarm is never triggered no matter if there is any modulation on it or not.
Note
“Beep Tone” is only active in “Fast Channel Scan”.
6.2.4 Marine Scan
The “Marine Scan” mode provides a quick scanning of the lower marine band.
The frequency range of the “Marine Scan” is defined from 156.050 MHz (Channel 01) to
157.425 MHz (Channel 88) and is scanned with 5 kHz frequency steps without gaps. The
frequency range cannot be changed. The duration of one scanning cycle is approx. 3
seconds.
Designation of the currently active scan mode
Scan frequency (changing until a signal is detected)
Time of the last signal detection
Frequency and the number of the equivalent
channel of the last signal detection
Fig. 39 Marine scan. Indication of frequencies
6.2.4.1 Marine Scan Operation
If a signal is found during the scan (signal level above squelch level), the scanning is
interrupted and the bearing of the signal is held for 30 seconds (default value, which can be
changed in the scan settings, s. 6.2.4.2), then the algorithm continues with scanning of next
frequencies.
If the button “OK” is pressed during the time of the active reception of the signal, the scanning
mode will be deactivated, and the current frequency will become the new main frequency.