This manual refl ects the operation of Main System Software version TBD or above. Some differences in operation may
be observed when comparing the information in this manual to earlier software versions.
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January 2004 Printed in the U.S.A.
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Abbreviation or Acronym Defi nitionAbbreviation or Acronym Defi nition
APR Approach
ARTCC Air Route Traffi c Control Center
AUX Auxiliary
CDI Course Deviation Indicator
CDU Control Display Unit
COM Communication (radio)
ENT Enter
FMS Flight Management System
FPL Flight plan
FREQ Frequency
FSS Flight Service Station
GPS Global Positioning System
HSI Horizontal Situation Indicator
Hz Hertz
ID Morse code identifi er
ILS Instrument Landing System
kHz Kilohertz
LD NAV1 Load NAV1
LD NAV2 Load NAV2
MFD Multi Function Display
MHz Megahertz
MIC Microphone
MSA Minimum Safe Altitude
NAV Navigation (radio)
NRST Nearest
PFD Primary Flight Display
PROC Procedure(s)
PTT Push-to-Talk
RX Receive
SQ Squelch
STBY Standby
TIS Traffi c Information Service
TX Transmit
VFR Visual Flight Rules
VHF Very High Frequency
VOL Volume
VOR VHF Omnidirectional Range
WX Weather
On both the PFD and the MFD, the G1000 VHF NAV/
COM interface occupies the top portion of the panel. As
shown in Figure 1-1, the NAV-related controls, windows
and fi elds are located on the left side, whereas the COMrelated controls, windows and fi elds are located on the
right side.
NAV Frequency Window COM Frequency Window
NAV
Controls
This section provides information on the following
On both the PFD and the MFD, the NAV and COM
Frequency windows are located at the top of the display
on either side of the Navigation Status bar.
• The NAV Frequency window is displayed to the
left of the Navigation Status bar.
• The COM Frequency window is displayed to
the right of the Navigation Status bar.
Each radio frequency sub-window is composed of two
(2) fi elds, a standby
• In the NAV Frequency window, the active frequency fi eld is located on the right side, while the
standby frequency fi eld is located on the left side.
• In the COM Frequency window, the active
frequency fi eld is located on the left side, while
the standby frequency fi eld is located on the right
side.
fi eld and an active fi eld.
1.3 FREQUENCY STATUS
Frequencies on the VHF NAV/COM interface can ei-
ther be standby, active or selected.
• Standby – indicates that the frequency is located
in the standby fi eld of the associated radio.
• Active – indicates that the frequency is located in
the active fi eld of the associated radio.
• Selected – indicated that the frequency is active
and that the associated radio is selected:
– on the HSI (NAV frequencies)
– on the GMA 1347 audio panel (COM frequen-
Frequencies located in the active fi eld are displayed
in either green or white.
• An active frequency that is displayed in green
indicates that the corresponding radio is selected
(i.e., in use).
• An active frequency that is displayed in white
indicates that the corresponding radio is not
selected.
Frequencies located in the standby fi eld are displayed
in either white or gray.
• The standby frequency that appears in the tuning
box is displayed in white.
• The standby frequency that is not in the tuning
box is displayed in gray.
!
NOTE: In GPS mode, both active NAV frequencies
are displayed in white.
1.6 FREQUENCY TOGGLE ARROW
frequencies of the radio sub-window on which the frequency tuning box is located. Pressing the dual COM or
NAV knob toggles both the frequency tuning box and the Frequency Toggle Arrow between the radios.
!
!
1.7 RADIO STATUS INDICATIONS
!
NOTE: In split COM mode, both active COM
frequencies are displayed in green.
Preliminary
1.5 TUNING BOX
On both the PFD and the MFD, a cyan tuning box appears over the standby frequency fi eld and can be moved
from one standby frequency fi eld to another for the purpose of tuning or radio selection.
In both the COM and NAV windows, the frequency
toggle arrow appears next to the tuning box, between the
active and standby frequencies.
A Frequency Toggle Arrow appears between the two
NOTE: If the frequency tuning box is on a
selected COM sub-window when a signal
is received or transmitted for this radio, the
Frequency Toggle Arrow is replaced by an RX or a TX indication, respectively.
NOTE: When the desired frequency is entered in
the tuning box, it becomes a standby frequency.
Pressing the Frequency Toggle key places this
standby frequency into the active fi eld, and vice
versa.
• RX – When a signal is received on a COM radio,
a white RX indication appears to the right of the
corresponding COM frequency for the duration of
the signal reception.
• TX – When a microphone is keyed, a white TX
indication appears to the right of the corresponding COM frequency for the duration of the signal
transmission.
• ID – When the VOL/PUSH ID knob is pressed, a
white ID indication appears to the left of the NAV
frequency on the selected NAV sub-window and
the Morse code identifi er audio for the selected
VOR frequency can be heard if the corresponding
NAV radio is selected on the audio panel.