User's Manual

3-1
SECTION 2
OPERATING INSTRUCTIONS
2.1 GENERAL
A 5-line display and a keypad and a rotary knob provide the operator control of the unit. The knob has multiple
functions including volume, and channel. The microphone, key line and headphone audio can be wired
separately for each of the 4 bands therefore switching from band to band is performed at an audio panel such
as the Technisonic A71X series.
2.3 POWER SWITCH
To switch the transceiver on, press and hold the knob until the radio powers up. The display will show
TECHNISONIC and the software version installed followed by the model number along with which RF modules
are installed. The display will then show the normal display. To switch off the transceiver at any time, press
and hold the knob for 2 seconds until the display shows OFF then release. If it is desired that the radio turns on
with the radio master in the aircraft, a power jumper may be installed (see installation instructions) such that
the radio is always on. The battery master must be used to turn the radio off with this jumper installed.
2.4 KNOB
The knob is a rotary encoder, which turns endlessly, meaning its actual position is not important. The knob also
has a push button incorporated in it so you can press the knob as well as turn it. The knob will start out as a
volume control. Pressing the knob again will change its function to act as the channel selector. Pressing the
knob again causes the keypad function to change from function keys to number keys. The knob in this mode
acts as a volume control. Another knob press will bring you to the recall mode. In the recall mode, typing in the
channel number will bring you quickly to that channel without scrolling through channels in between. Pressing
the knob again brings it back to the volume control mode. The current function of the knob is shown at the
bottom right of the display.
2.5 SOFT KEYS AND HOME
The transceiver has three soft keys, which assume the function shown on the menu above them on the
display. Menu items include:
PWR - Selecting PWR will allow the power output of the radio to be set to high or low.
SCAN – Selecting SCAN will invoke the radio to scan the channels previously programmed into the
scan list.
FPP – Front Panel Programming mode. Allows you to program channels with TX/RX frequencies,
channel name, tones or codes.
At any time while in one of these functions, you can escape back to the normal mode by pressing the HOME
key.