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G T X 3 2 0 T R A N S P O N D E R P i l o t ’ s G u i d e...
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Function Selector Switch The function selector switch is a five position rotary switch. The five positions are: • OFF—Turns off all power to the GTX 320 (the GTX 320 should be turned off before starting aircraft engine(s). • SBY—Turns the transponder on, but when in SBY the GTX 320 will not reply to any interro- gations from the ground radar system.
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7500 will be decoded as the hijack code. An aircraft’ s transponder code (when available) is utilized to enhance the tracking capabilities of the ATC facility, therefore you should not turn the GTX 320 to SBY when making routine code changes. Important Codes •...