Garmin 010-00230-00 Installationshandbuch - Seite 28

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POST INSTALLATION CONFIGURATION AND CHECKOUT PROCEDURE

5.1

The coverage you can expect from the GTX 330 is limited to line of sight. Low altitude or

antenna shielding by the aircraft itself may result in reduced range. Range can be improved

by climbing to a higher altitude. It may be possible to minimize antenna shielding by

locating the antenna where dead spots are only noticed during abnormal flight attitudes.

The function selection switches are:

• OFF  Powers off the GTX 330. Pressing the STBY, ON or ALT key powers on the transponder

displaying the last active identification code.

• STBY  Selects the standby mode. When in standby mode, the transponder will not reply to any

interrogations.

• ON  Selects Mode A and Mode S. In this mode, the transponder replies to Mode A, Mode C and Mode

S interrogations, as indicated by the Reply Symbol ("

information.

• ALT  Selects Mode A, Mode C and Mode S. In ALT mode, the transponder replies to identification,

altitude and Mode S interrogations as indicated by the Reply Symbol ("

interrogations include the standard pressure altitude received from an external altitude source,

which is not adjusted for barometric pressure. The ALT mode may be selected in aircraft not

equipped with an optional altitude encoder; however, the reply signal will not include altitude

information.

GTX 330 Installation Manual

190-00207-02

Figure 5-1. GTX 330 Front Panel

The GTX 330 should be turned off before starting aircraft engine(s).

NOTE

"), but the replies do not include altitude

"). Replies to altitude

Page 5-1

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