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1. OPERATIONAL OVERVIEW
1-2
1.2 How to Turn On/Off the Power
Rotate the VOLUME/PWR knob clockwise to turn on the power. The RT screen ap-
pears.
To turn off the power, rotate the VOLUME/PWR knob counterclockwise to the OFF po-
sition.
In the dual control unit system, the No.1 control unit has priority and it controls the
power for both itself and the No. 2 control unit. The power switch of the No. 2 control
unit powers on/off the No. 2 control unit only.
Note: Turn on the power at the switchboard more than 15 minutes before turning on
this equipment.
1.3 Radiotelephone (RT) Screen
Turn the power on, or press the RT/CH key to show the RT (radiotelephone) screen.
This is where you set up the transceiver unit, and communicate by voice or telex.
Radiotelephone (RT) screen
2/NB key Turns the noise blanker on or off in the RT mode.
3/SQ key Turns the squelch on or off in the RT mode.
5/NR key Reduces the noise in the RT mode (NR2 (High), NR1 (Low), Off).
8/NF key Turns the notch filter on or off in the RT mode.
0/TUNE key Tunes the antenna in radiotelephone operation.
key
• Turns down the handset volume.
• Moves the cursor when setting channel or RX frequency.
key
• Turns up the handset volume.
• Moves the cursor when setting channel or RX frequency.
ALARM lamp • Flashes in red for distress and urgency messages.
• Flashes in green for safety and routine messages, and when daily test is
completed.
OVEN lamp Lights in green when the main switchboard is on.
Control Function
Function keys
Tab area: Sessions
in progress
Spinner: Rotates when
the equipment is
functioning normally.