User's Manual

M7X and M7R Page 3-5 Operation
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Fig 3-3 Control Head Key Functions
Provides a visual BIT alarm:
 Green = no fault
 Red = internal fault
 Flashing red = external warning
 Flashing green = an external
warning that has been
acknowledged by the operator.
When pressed, displays the BIT screen.
Toggles Squelch Defeat between On and
Off. Key lights (Blue) when squelch is
defeated or a signal is received.
Keys the transmitter using modulation
from the Microphone connector. Key lights
(Blue) when the transmitter is keyed.
When the display shows the
Home screen (as shown in
this figure) Key 9 and Key 10
are used as a volume control
for the internal loudspeaker
and headphones.
Key 1 to Key 13
These are soft keys that allow selection of the
displayed function.
A 12 button keypad used for numeric or alphanumeric entries. Most buttons are
multi-function with each press cycling through the characters. For example button
2 cycles through: a b c A B C 2.
When a different button is pressed, the last character selected is accepted and the
new button is treated as the next character.
If two sequential characters from the same button are required, the Arrow keys
(Key 7 and Key 8) must be used. The Arrow keys are shown in Fig 3-4 on page 3-6.
The legends Key 1 to Key 13
shown in this illustration, and
throughout this documentation,
are not engraved on the keys.
The legends are used in this
documentation in order to
simplify identification.