
System Overview 1-15
COM-NAV
The VHF radio consists of a Com radio that covers the frequency
band from 118.0 MHz to 136.990 MHz and a Nav radio that
covers the frequency band from 108.0 MHz to 117.95 MHz. Both
25 kHz and 8.33 kHz spacing is supported. The radio can be
configured as a 16 watt or 10 watt transmitter at the factory prior
to shipping.
Display
The active com frequency (the frequency that the radio will
transmit on when the Push-To-Talk button is pressed) is
displayed in green and the standbys (there can be more than one
standby frequency) are displayed in white.
Display of the frequencies can be formatted in several ways via
the “User Options” and “Datablock Setup” LSKs of the SETUP tab
on the AUX page (see the Datablock Setup description in Section
4 for more details). The default display format is two com
frequencies (active and #1 standby) above two nav frequencies
(active and #1 standby). A custom display format can be set up
to display the active com and up to four standby com frequencies.
The frequency that will be swapped into the active frequency
when the bezel Frequency Swap button is pressed is called the
“# 1 Standby”. For example, in the case where the user has set
up 4 com slots to be displayed, any one of slots 2, 3 or 4 can be
selected to be the “#1 Standby” simply by touching the slot. In
every case, the “#1 Standby” slot is visually indicated by a cyan
outline.
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