RHOTHETA User Manual RT-800
Page 51 of 192
Fig. 27 Example: Timing normal monitoring
Note
Receiving on the monitoring frequencies can be triggered by the wrong adjustment of the
squelch level!
Please always prove the correctness of the squelch adjustment on the scan frequencies.
6.2.2.2 Timing Monitoring with Selected Cospas-Sarsat Main Frequency
If the main frequency is adjusted to a Cospas-Sarsat frequency, the timing cycle will be
changed automatically.
Fig. 28 Example: Timing Cospas-Sarsat monitoring
Additionally, the Cospas-Sarsat-scanning is activated, in order to catch the short pulse
(duration of pulse approx. 400 msec, coming approx. every 50 seconds).
6.2.2.3 Monitoring with Filtering of Emergency Transmitters: ID-Only
Signals transmitted by emergency transmitters (PLB/ELT) are modulated with a typical
sweeping tone. In order to exclude false alarms caused by disturbing signals or by not
authorized radio-communication during monitoring mode, the function "emergency transmitter
filtering ID-Only" can be activated.
Once activated, the alarm for all radio signals without the prescribed sweeping tone for
emergency transmitters will be suppressed. Alert will be triggered only if a modulated
emergency signal is recognized.
For the procedure of how to activate the emergency transmitter filtering function, see 6.2.2.4
(Fig. 31, position 6).
Note
For very weak signals the recognition of modulation may take a certain time.
Releasing an alarm can be delayed in this case.
6.2.2.4 Monitoring Settings
o
To start the “Monitoring” mode select the corresponding line on the “Scan” page and
press “OK” or the hotkey “Start Scan” (s. Fig. 29, position 1).
