Cockpit Reference Guide

Garmin G1000 Cockpit Reference Guide for the Cessna Nav III
190-00384-08 Rev. A
4-3
SECTION 4 – NAV/COM &
TRANSPONDER
4.1 RADIO STATUS INDICATIONS
• RX – When a COM signal is received, a white ‘RX’
appears by the active COM frequency during signal
reception.
• TX – When a COM radio is transmitting, a white ‘TX’
indication appears to the right of the corresponding
COM frequency.
• ID – When the Morse code identifier is ON for a
NAV radio, a white ‘ID’ indication appears to the
left of the corresponding active NAV frequency.
The Morse code identifier can be heard if the
corresponding NAV radio is selected on the audio
panel.
Figure 4-5 Radio Status Indications
4.2 VOLUME
‘VOLUME’ is displayed in place of the associated radio
name (i.e., ‘COM1’ or ‘NAV2’) for two seconds after the
volume level is last changed. The percentage of maximum
volume is displayed in place of the standby frequency
selected by the tuning box.
Figure 4-6 COM Volume Level
4.3 AUTOMATIC SQUELCH
Automatic squelch can be disabled for a COM radio by
pressing the COM Knob to place the tuning box on the
desired COM’s standby frequency, then by pressing the
VOL/PUSH SQ Knob.
When Automatic Squelch is disabled, a white ‘SQ’
appears next to the COM frequency.
Squelch
Indication
Figure 4-7 Squelch Indication
4.4 QUICKLY ACTIVATING 121.500 MHZ
Pressing and holding the COM Frequency Transfer
Key for approximately two (2) seconds automatically tunes
the selected COM radio to the emergency frequency.
4.5 OPTIONAL NAV RADIOS
DME Radio (optional)
The DME Tuning Window is displayed by pressing the
DME Softkey.
Figure 4-8 Radio Tuning Window
Changing the DME tuning source:
1) From the tuning window, turn the large FMS Knob
to highlight the DME source field.
2) Turn the small FMS Knob to display the selection
window. Turn the
FMS Knob to select the desired
mode and press the ENT Key.
Figure 4-9 DME Selection Window