Rhotheta RT-300 - Display of Signal Level; Squelch Level; Frequency; Channel Display (Not Available in VHF;UHF-Version); Status Display

User Manual Bearing System RT-300
Issue: 2017/06/27 [Rev 1.04.c] Page 19 of 79 12-9-1-0013-9-2-0001-3-1-60
Display Direction of reference Remarks
TRU true (geographic) north bearing relative to geographic north
optional internal compass module required or
 compass information via NMEA interface required, input of
variation(see 6.2.1.5.4.5.3)
5.1.6 Display of Signal Level
The present signal level is displayed as figures (0..99%) as well as
an analog bar graph. The display is not calibrated and is serving
as a qualitative measure.
5.1.7 Squelch Level
The small triangle on top of the bar graph (see Fig. 11) is the selected squelch level. Is the bar
graph of the level-display left of the triangle, receiving is switched off.
5.1.8 Frequency / Channel Display (not available in VHF/UHF-Version)
The upper right area of the display is showing the present working
frequency or the present selected channel in the maritime band. If
a duplex channel is selected, additional information is given:
“SHIP” for a maritime radio station (lower band) or „COAST“
(upper band) for the coastal radio station.
The working frequency in the maritime band will be displayed, if
option CHANNEL MODE OFF in submenu SETUP -RECEIVER -
CHANNEL is selected.
5.1.9 Status Display
The upper left area of the display is showing status information. The
bearing system is verifying continuously different parameters and
signals. If everything is working correctly, the information “OK” will
be displayed.
If one or more parameters are leaving the permitted range of values,
a warning message or error message is displayed.
5.1.9.1 Warning
A warning message is displayed, if working parameters are nearing significantly close to the
permitted limit value, or if external bearing signals are not available anymore. The system´s
basic functions are not affected yet, but preventive measures are recommended.
A warning is displayed in the status field with the letter „W“ followed by an error indicating figure.
After that a short characterization of the warning is displayed.
At warnings, indicating the missing of a required signal, the warning message is displayed
additionally as a text instead of the digital bearing value.
Fig. 11
Fig. 12
Fig. 13