Alan HP450 2A Rugged, Руководство пользователя

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9
English
5 Basic features
5.1 Switching the device on and off
Turn the On/Volume knob clockwise until it clicks: the LCD displays
switches on and the device issues a confirmation beep.
2
The backlighting of the LCD display switches off automatically
after five seconds for energy saving purposes, while the display
remains on.
To switch the transceiver off, turn the On/Volume counterclockwise.
5.2 Backlighting
When you switch the device on or press one of the HI/LO , SCAN/
LOCK , MENU or MON keys, the device automatically enables the
backlighting for approximately five seconds to allow you to read
the displayed messages if the lighting is not adequate. To keep the
backlighting on for 5 seconds more, press another key.
2
The backlighting of the display consumes battery energy and
should therefore be used sparingly.
5.3 Checking the level of the batteries charge
When the transceiver is in standby mode, the battery charge indicator
continuously displays the residual charge of the battery.
2
Icon indicates that the charge is insufficient and that the
device will soon switch off.
2
The consumption of the battery charge is affected by the volume
level set.
5.4 Adjusting the squelch (suppressing background noise)
The radio is fitted with a device called squelch that attenuates
the background noise when no signals are present. The enabling
threshold can be adjusted according to your specific needs.
1) Briefly press MON twice. Sq displays, while the right section
displays a number from 1 to 8 , depending on the squelch level
you have set.
2) Press
q
several times to set the enabling threshold on 1 (minimum
value). You will hear a slight background noise.
3) If the radio is not receving signals, press
p
several times to
gradually increase the squelch value and stop as soon as
you detect the minimum value that guarantees a stable noise
suppression.
4) Press PTT (or wait five seconds). The device returns to the
standby mode and stores the settings you have selected.
2
Make sure you do not set an excessively high squelch level
because in this case you may not be able to receive weaker
signals. On the other hand an excessively low squelch value
could enable the squelch even when no signals are present.
2
This adjustment must be carried out within five seconds, otherwise
the device returns to standby mode and stores the currently set
value.
I
Squelch must always be adjusted when no signals are
present.
5.5 Selecting the operating channel
1) Press MENU once. The display flashes.
2) Press
p
or
q
to select the desired channel. To quickly scroll the