AUDIO PANEL AND CNS
FREQUENCY SPACING
The G1000 COM radios can tune either 25-kHz spacing (118.000 to 136.975 MHz) or 8.33-kHz spacing (118.000 to 136.990 MHz) for 760-channel or 3040-channel configuration. When 8.33-kHz channel spacing is selected, all of the 25-kHz channel spacing frequencies are also available in the complete 3040-channel list.
COM channel spacing is set on the System Setup Page of the AUX Page Group.
8.33-kHz Channel |
25-kHz Channel |
Spacing |
Spacing |
Figure 4-13 COM Channel Spacing |
|
Changing COM frequency channel spacing:
1)Select the AUX – System Setup Page.
2)Press the FMS Knob to activate the flashing cursor.
3)Turn the large FMS Knob to highlight the Channel Spacing Field in the COM Configuration Box.
4)Turn the small FMS Knob to select the desired channel spacing.
5)Press the ENT Key to complete the channel spacing selection.
While the COM CONFIG Window is selected, the G1000 softkeys are blank.
Select 8.33-kHz or 25.0-kHz COM Frequency Channel Spacing
AUX - SYSTEM
SETUP PAGE
Figure 4-14 AUX – System Setup Page
190-00498-03 Rev A |
Garmin G1000 Pilot’s Guide for Cessna Nav III |
4-13 |
AUDIO PANEL AND CNS
AUTOMATIC SQUELCH
Automatic Squelch quiets unwanted static noise when no audio signal is received, while still providing good sensitivity to weak COM signals. To disable Automatic Squelch, press the VOL/SQ Knob. When Automatic Squelch is disabled, COM audio reception is always on. Continuous static noise is heard over the headsets and speaker, if selected. Pressing the VOL/SQ Knob again enables Automatic Squelch.
When Automatic Squelch is disabled, a white SQ appears next to the COM frequency.
Press the COM VOL/
SQ Knob to turn off
Automatic Squelch.
Press again to restore
Automatic Squelch.
Squelch
Indication
Figure 4-15 Overriding Automatic Squelch
VOLUME
COM radio volume level can be adjusted from 0 to 100% using the VOL/SQ Knob. Turning the knob clockwise increases volume, turning the knob counterclockwise decreases volume. When adjusting volume, the level is displayed in place of the standby frequencies. Volume level indication remains for two seconds after the change.
COM Volume
Level Remains for
Two Seconds
Figure 4-16 COM Volume Level
4-14 |
Garmin G1000 Pilot’s Guide for Cessna Nav III |
190-00498-03 Rev A |