User Guide

Series III Avionics
Pilot's Guide
Page 32
When the large knob is rotated clockwise from 18
to the next detent, 2100 will appear in the display.
Next, rotating the small knob one detent clockwise
will cause 2182 to appear in the display. The small
knob may then be used to tune from 2181 through
2183 about the maritime emergency frequency of
2182 kHz.
WHOLE/HALF KHZ
Pushbutton switch. Alternates
between one-half kHz tuning and whole (units)
tuning by the small FREQUENCY KNOB. When in
the one-half kHz tuning mode, a decimal point will
appear in the display.
In the TST position of the FUNCTION SELECTOR,
pressing the WHOLE/HALF KHZ pushbutton
displays relative station bearing in the lower line of
the display to the nearest tenth of a degree.
FREQUENCY TRANSFER
Momentary pushbutton switch. Pressing and
immediately releasing exchanges the active and
standby frequencies when both are displayed.
Pressing and holding for two seconds before
releasing temporarily removes the standby
frequency. This allows the active frequency to be
changed. Pressing again for two seconds restores
the standby frequency.
Pressing and holding for seven seconds or longer
before releasing sets the receiver to its lowest
tunable frequency (100 kHz).