Code Selection; Configuration - Garmin GTX 327 Installation Manual

3.2.3 Code Selection

Code selection is done with eight keys (0 - 7) that provide 4,096 active identification codes. Pushing one
of these keys begins the code selection sequence. The new code is not activated until the fourth digit is
entered. Pressing the CLR key moves the cursor back to the previous digit. Pressing the CLR key when
the cursor is on the first digit of the code, or pressing the CRSR key during code entry, removes the
cursor and cancels data entry, restoring the previous code. You may press the CLR key up to five
seconds after code entry is complete to return the cursor to the fourth digit. The numbers 8 and 9 are not
used for code entry, only for entering a Count Down time, contrast and display brightness, and data
selection in the Configuration Mode.
The selected identification code should be entered carefully, either one
assigned by air traffic control for IFR flight or an applicable VFR
transponder code.
• Important Codes:
1200  VFR code for any altitude in the US (Refer to ICAO standards elsewhere)
2000  VFR code commonly used in Europe (Refer to ICAO standards)
7000  VFR code commonly used in Europe (Refer to ICAO standards)
7500  Hijack code (Aircraft is subject to unlawful interference)
7600  Loss of communications
7700  Emergency
Avoid selecting code 7500 and all codes in the 7600-7777 range. These codes trigger special indicators
in automated facilities. An aircraft's transponder code is used for ATC tracking purposes, therefore
exercise care when making routine code changes.
3.3 CONFIGURATION PAGES
With the unit turned off, holding down the FUNC key and pressing one of the power on keys provides
access to the configuration pages. The FUNC key sequences through the configuration pages. The
START/STOP key reverses through the pages, stopping at the first configuration page. The CRSR key
highlights selectable fields on each page. When a field is highlighted, numeric data entry is performed
with the 0 – 9 keys and list selections are performed with the 8 or 9 keys. Press the CRSR key to accept
changes. Pressing the FUNC key displays the next configuration page without saving the changes.
Configuration page changes are stored in EEPROM memory. To exit the configuration pages, turn the
power off. Then turn on again (without holding the FUNC key) for normal operation.
GTX 327 Installation Manual
190-00187-02
NOTE
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Rev J