User's Manual

RHOTHETA User Manual RT-800
Page 56 of 78
exactly to north, the deviation correction can be put in here. The offset is adjustable from 0° to
359° (e.g. -15° = 345°).
7.3.5 PS Ram
An external compass connected, the bearing value determination is done by a special,
improved compensating procedure. For a compass of minor quality (e.g. heavy and quick
variations) it may be necessary, to switch off the compass compensation. Select „ Compass
Compens. Off“.
7.3.6 Monitoring
In the default setting " Off Blocked“ it is not possible to deactivate the monitoring operation
(see 6.4). Thus, surveillance of the emergency frequencies cannot be switched off by
mistake. If the monitoring operation is to be switched off manually, the setting "

 Off Blocked"
has to be deactivated.
The DF-systems monitoring/scanning function can now be switched on/off in the
corresponding dialogue window (see 6.4).
7.3.7 S/N-Ratio AutoSQL
This value controls the Auto-Squelch. It determines how many level-points the squelch
marker is set above the noise level. If the value is 6 for example, the squelch marker is
adjusted always 6 level-points above the noise level. Default value is “6”.
7.3.8 AU-Calibration
This setting can disable the internal calibration values of the AU. Change this setting only in
special cases or if you are told by RHOTHETA Elektronik GmbH.
7.3.9 BeepTone Decoding
This parameters control the behaviour of the “Alarm Only Decoding / BeepTone” option of
Fast Channel Scan.
7.3.9.1 Frequency High / Frequency Low
With Frequency High / Frequency Low you specify the range of the audio-frequency which
triggers an alarm. That means if a signal should trigger an alarm, the audio frequency of the
signal must be greater than Frequency Low and less than Frequency High.
7.3.9.2 Decoding Time
Decoding Time determines the minimum duration of an audio signal (within the specified
frequency range) that should trigger an alarm.
For example given the parameters Decoding Time = 800ms, Frequ. High = 875 Hz, Frequ.
Low = 725 Hz, the signal must remain at least 800 milliseconds continuously with its
frequency between 725 Hz and 875 Hz to start an alarm.
7.3.10 CPSS Dialog Time
This setting could be used to select the duration until the dialogue Cospas/Sarsat-Decoding
closes automatically.