Section 3: NAV Frequency
3.1 OVERVIEW
The G1000 NAV radios operate in the aviation fre-
quency band of 108.00 to 117.95 MHz, with 50 kHz
channel 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 or NAV2 identifi er indication
NAV frequency is a valid frequency and its Morse
code identifi er signal is received by the system).
• Color code indication of the selected NAV receiver
• Indication of the Morse code identifi er fi lter status
3.2 VOLUME
Volume level for the NAV radios can be adjusted by
using the VOL/PUSH ID knob (top knob on the left
side of the display) located above the NAV Frequency
Toggle key. Turning the VOL/PUSH ID knob clockwise
increases volume level, while turning this knob counter-
clockwise decreases volume level.
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G1000_COM-NAV_PG.indd 9
Window
(if the active
Garmin G1000 VHF NAV/COM Pilot's Guide
OPERATION – AUTO-TUNING
3.3 MORSE CODE IDENTIFIER
Pressing the VOL/PUSH ID knob toggles the Morse
code identifi er fi lter ON and OFF for the active NAV fre-
quency next to which the tuning box is located. When
the Morse code identifi er fi lter is ON, an ID indication
appears to the left of the corresponding active NAV fre-
quency.
The Morse code identifi er fi lter is ON for
the GHM VOR.
Figure 3-1 ID Indication
The Morse code identifi er for an active NAV frequency
can only be heard if the Morse code identifi er fi lter for
the corresponding NAV radio is turned on (i.e., if the ID
indication appears next to the active NAV frequency) and
if the corresponding NAV radio is selected on the GMA
1347 audio panel (i.e., the associated NAV radio annun-
ciator lights are illuminated).
Here, since NAV2 is the only
NAV radio selected on the
audio panel, only the Morse
code identifi er for the GHM
VOR can be heard.
Figure 3-2 Morse Code Identifi er Audio
NAV portion of
the GMA 1347
audio panel
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2/10/2004, 8:47:53 AM
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