Revision A9 70
GRT Avionics Mini-X Installation, Setup & User Manual
8.2.3 Transponder Mode/Code Display
Once the TT22 A/B port or serial port is set up, there is a Transponder display box in the lower
left hand corner of the EFIS screen under the airspeed tape. This box shows the active mode and
squawk code.
8.2.4 Mode Selection
1. Press any key on the Mini to make the softkeys appear, then press XPDR softkey.
2. Press the softkey under the MODE column until the desired mode is highlighted. Then press
EXIT.
3. By highlighting the AUTO mode, the transponder automatically enters ALT mode when the
EFIS senses an indicated airspeed of 35 knots. Under 35 knots, it assumes ground operation
and reverts to the STBY mode.
8.2.5 Code Selection
1. Press the XPDR softkey to bring up the Transponder controls.
2. Press the CODE softkey to bring up the squawk code entry page, shown below.
3. Note the cursor under the first digit of the sqauwk code. Turn the right knob to change the
underlined digit. Press the knob to enter the new digit and move the cursor to the next digit.
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In case of entry error, press the knob repeatedly until the cursor comes back to the digit
you want to change.
4. OR– To quickly enter the VFR (1200) squawk code, press the 1200 softkey.
5. When finished, press SAVE.
6. OR– To exit without changing the sqawk code, press CANCEL.