Panel Lock; Battery Status - LD Systems U500 Série Manuel D'utilisation

SQUELCH
The squelch control prevents unwanted background noise when the transmitter is turned off. In addition, sudden background noises are
suppressed when the signal transmitted from the transmitter to the receiver is not strong enough (for instance because of excessive
distance) Set the squelch control (with the transmitter switched off) to the lowest setting, which still effectively suppresses background
noises. In unfavourable conditions, in the "HIGH" setting, the transmission range may decrease. Press the pressure rotary encoder (MENU)
to access the Edit menu and select the menu item SQUELCH by rotating the encoder (light background). Press MENU again and select the
optimum setting for your application by rotating the encoder (LOW = low, MID= mid and HIGH = high threshold). To confirm, press MENU.
Pressing MENU once more will take you up one level in the menu structure. Press briefly(!) on POWER to return directly to the main display.
After about 10 seconds of inactivity, the main display is automatically shown.
BRIGHTNESS
Menu item to adjust the brightness of the display illumination. Press the pressure rotary encoder (MENU) to access the Edit menu and
select the menu item BRIGHTNESS by rotating the encoder (light background). Press MENU again and select the optimum setting for your
application by rotating the encoder (LOW = low, MID= mid and HIGH = high brightness). To confirm, press MENU. Pressing MENU once more
will take you up one level in the menu structure. Press briefly(!) on POWER to return directly to the main display. After about 10 seconds of
inactivity, the main display is automatically shown.

PANEL LOCK

To protect the receiver against accidental and unauthorised operation, it is possible to initiate an automatic locking of the controls. Press the
pressure rotary encoder (MENU) to access the Edit menu and select the menu item PANEL LOCK by rotating the encoder (light background).
Press again on MENU and using the encoder, select ON, for initiating the automatic lock (right turn), or OFF to switch it off (turn left). To con-
firm, press MENU. Pressing MENU once more will take you up one level in the menu structure. Press briefly(!) on POWER to return directly
to the main display. If the automatic lock is activated, after approx. 10 seconds, "DISPLAY IS LOCKED" is displayed for a short time and also
if one of the controls is activated; a change to the settings of the receiver via the control elements is then not possible. Press and hold the
pressure rotary encoder for approx. 3 seconds to unlock the control elements ("DISPLAY IS UNLOCKED" is displayed for about 1 second).
EXIT
To exit the Edit menu and return to the main display, select EXIT (light background) by rotating the pressure rotary encoder and press
MENU. Alternatively, press briefly(!) on POWER to return directly to the main display. After about 10 seconds of inactivity, the main display is
automatically shown.

BATTERY STATUS

The battery status of the corresponding transmitter will appear on the display and is constantly updated. When the battery is fully charged,
the icon ( = approx. 70%, = approx. 30%) will appear. As soon as the icon for "low battery" is displayed, the
display changes to "LOW BATTERY" and shows approximately every 5 seconds. Replace the batteries immediately.
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