2
1
12
11
10
9
8
3
4
5
6
7
What is what?
1.
Display.
2.
Indicator lamps.
TX, steady light:
Transmitting.
TX, flashing:
Distress button pressed (ALARM flashes in antiphase).
CALL, flashing:
DSC call received.
ALARM, steady light:
An alarm condition exists.
ALARM, flashing:
Distress or urgency call received.
3.
Keyboard.
4.
DISTRESS button. Protected by shield. To use, lift the shield and press for 3 seconds.
5.
Dimmer control.
6.
ON/OFF push button. To switch off, press for 2 seconds.
7.
Volume control.
8.
Press to start creating a DSC call.
9.
Opens the Log over received and sent DSC calls.
10. Opens the DSC Address Book.
11. TEL/DSC function switch.
12. Soft keys. The function of each key is described in its respective line at the right edge of
the display.
0131
iii
Tx
CALL
ALARM
CALL
Tx
ALARM
6
1
PWR
Rx
7
TUNE
SPK
2
Tx
CH
DSC
FUNC
MODE
8
SQ
9
SCAN
3
4
ENTER
0
5
2182
ON/OFF
BOOK
CALL
LOG
TEL /
PQR
ABC
STU
VWX
DEF
GHI
MNO
YZ-
JKL
DISTRESS
HC4500B MF/HF CONTROL UNIT
VOL
