GT6201
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DV 17001.03 Issue 4 01/2015
Page 47
The panel brightness for display illumination and pushbuttons can be changed from 0 (illumination
off) to 100 (maximum brightness) by turning the “ROTARY ENCODER“.
Note:
This page is not available if in installation setup the dimming input is set to 14 V or
28
V. For this setting the vehicle or control desk
dimming circuit controls the
brightness parameters.
SQUELCH
By a short press of the push button of the “ROTARY ENCODER” the next page “SQUELCH” is
displayed. The active frequency is indicated in the top line of the display. On the bottom line is
indicated ”SQUELCH” with a bar graph and a value.
By another press on the “MDE” key change to SQUELCH and by means of the “ROTARY
ENCODER“, the setting can be changed. The active frequency stays indicated in the top line of the
display and on the bottom line “SQUELCH” label appears together with a bar graph and the current
value.
By turning the “ROTARY ENCODER” the squelch threshold can be adjusted:
•
from 6 (very weak signals are audible with high noise content; squelch opens at
about -105 dBm),
•
to 26 (only quite strong signals are audible with low noise content; Squelch
opens at about -87 dBm).
3.13
Warning and Failure Indications
Display Contents
Description
Reappear every 3 seconds.
“LOW BATT” is indicated if the supply voltage of the
transceiver is below the threshold defined in the
installation setup.
The transceiver is still operable but may have a reduced
performance depending on supply voltage.
Possible reasons for indication:
•
Accumulator capacity problems (gliders),
•
Power interrupts,
•
General power supply problems,
•
Setting for low battery threshold is too high.