User Guide

190-00552-00 Rev. A

Garmin G1000 Pilot’s Guide for the Columbia 350/400

4-39

AUDIO PANEL AND CNS

ALTITUDE MODE (AUTOMATIC OR MANUAL)

Altitude Mode is automatically selected when the aircraft becomes airborne. Altitude Mode may also be

selected manually by selecting the

ALT

Softkey.

If Altitude Mode is selected, a green ALT indication and transponder code appear in the mode ﬁeld of the

Transponder Data Box, and all transponder replies requesting altitude information are provided with pressure

altitude information.

Figure 4-46 Altitude Mode

REPLY STATUS

When the Transponder sends replies to interrogations, an ‘R’ indication appears momentarily in the reply

status ﬁeld of the Transponder Data Box.

Figure 4-47 Reply Indication

CODE SELECTION

ENTERING A CODE

NOTE: When entering a code, select the BKSP (backspace) Softkey to back up and change code digits.

A total of 4096 discrete identiﬁcation codes can be selected with the Code Selection Softkeys.

Entering a transponder code:

1) Select the

XPDR

Softkey to display the transponder Mode Selection Softkeys.

2) Select the

CODE

Softkey to display the transponder Code Selection Softkeys, for digit entry.

3) Select the digit softkeys to enter the code in the code ﬁeld.

OR:

Use the numeric keys on the MFD/PFD Control Unit to enter the transponder code.

When entering the code, the next digit in sequence must be selected within 10 seconds, or the entry

is cancelled and restored to the previous code. Five seconds after the fourth digit has been entered, the

transponder code becomes active.

Figure 4-48 Entering a Code