GNS 430(A) Pilot’s Guide and Reference
190-00140-00 Rev. P
1-9
SECTION 1
INTRODUCTION
Selecting COM and VLOC Frequencies
While the GNS 430 is acquiring a position, take a
minute to dial in the active and standby frequencies to
be used for the rst phase of the ight. The GNS 430’s
display is divided into separate windows (or screen areas),
including a COM Window, VLOC Window, and the GPS
Window (Figure 1-11).
Figure 1-11 Standby Frequency 135.325 MHz
COM Window
GPS Window
VLOC
Window
Active Frequency
Standby Frequency
To change the standby communication
frequency:
1) Press the small left knob if needed, to move
the tuning cursor to the COM Window (Figure
1-11).
2) Turn the large left knob to select the MHz,
and the small left knob to select the kHz of
the desired frequency.
To place the standby communication
frequency in the active field:
Press the COM Flip-flop Key (Figure 1-12).
Figure 1-12 Active Frequency 135.325 MHz
Once the active frequency has been entered, repeat
steps 1 and 2 to enter the standby frequency. After both
communication frequencies have been entered, the COM
Window may be kept ‘hot’ by leaving the cursor on the
standby frequency. Move the cursor to the VLOC Window
by pressing the small left knob.
NOTE: When selecting VLOC frequencies, the
tuning cursor automatically returns to the COM
Window after 30 seconds of inactivity.
To change the standby VLOC frequency:
1) Press the small left knob if needed, to activate
the tuning cursor in the VLOC Window.
2) Turn the large left knob to select the MHz,
and the small left knob to select the kHz of
the desired frequency.
To place the standby frequency in the
active field:
Press the NAV Flip-flop Key.
