4.3 NAV FREQUENCY WINDOW
OVERVIEW
The G1000 NAV radios can be tuned over the 108.00
to 117.95 MHz frequency range with 50 kHz spacing. The
Navigation Frequency window is located to the left of the
Navigation Status bar, provides the control and display of
dual VOR/ILS receivers (NAV1 and NAV2) and displays
the following information:
• NAV1 and NAV2 active and standby frequencies
• NAV1 and NAV2 identifier indication
NAV frequency is a valid frequency and its Morse
code identifier signal is received by the system).
• Color-coded indication of the selected NAV radio
• Indication of the Morse code identifier status
VOLUME
NAV radio volume level can be adjusted from 0 to
100% of available volume (in increments of 3.25 percent-
age points) using the VOL/PUSH ID knob located above
the NAV Frequency Toggle key. Turning the VOL/PUSH
ID knob clockwise increases volume level for the NAV
radio on which the tuning box is placed, while turning
this knob counterclockwise decreases volume level for
this NAV radio. When adjusting volume level for a NAV
radio, volume level is displayed in place of the corre-
sponding standby NAV frequency and the associated NAV
radio name (i.e., 'NAV1' or 'NAV2') is replaced by the term
'VOLUME'. Volume level remains displayed in the NAV
Frequency window for a duration of two seconds after
volume level is last changed.
Figure 4.3.1 NAV Volume Level
190-00445-00 Rev. A
(if the active
Garmin G1000 VHF NAV/COM Pilot's Guide for Mooney M20M & M20R
MORSE CODE IDENTIFIER
Pressing the VOL/PUSH ID knob toggles the Morse
code identifier ON and OFF for the active NAV frequency
next to which the tuning box is located. When the Morse
code identifier is ON, an ID indication appears to the left
of the corresponding active NAV frequency.
The Morse code identifier is ON for the
GHM VOR.
Figure 4.3.2 ID Indication
The Morse code identifier for an active NAV frequency
can only be heard if the Morse code identifier for the cor-
responding NAV radio is turned on (i.e., if the ID indica-
tion appears next to the active NAV frequency) and if the
corresponding NAV radio is selected on the audio panel
(i.e., if the associated NAV radio annunciator light is il-
luminated on the audio panel).
Here, since NAV2 is the only
NAV radio selected on the
audio panel, only the Morse
code identifier for the GHM
VOR can be heard.
Figure 4.3.3 Morse Code Identifier Audio
NOTE: When a VOR signal is received, the VOR/
LOC name identifier is displayed to the right
of the corresponding active NAV frequency,
regardless of the status of the Morse code identi-
fier.
OPERATION – NAV
NAV portion
of the audio
panel
4-9
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