User's Manual

includes a gear squat switch. Aircraft installations that include a gear

squat switch will automatically select GND on landing.

Push Buttons

IDT Press the IDT button when ATC instructs you to “Ident” or

“Squawk Ident”. This activates the SPI pulse in the

transponder replies for 18 seconds. IDT will appear in the

display.

FN Pressing the FUNC button provides access to changing

the Flight ID.

VFR Pressing the VFR button sets the transponder to the pre-

programmed conspicuity code. Pressing the button again

restores the previous squawk code.

ENT The ENT button enters a digit in the code selector.

Code Selector Knob

The right hand knob is used to set squawk codes and the Flight ID.

The FN button selects which will be updated. Turning the knob will

highlight the first digit on the display, and the digit can be changed as

required. Press the ENT button to advance to the next digit. When

ENT is pressed on the last digit, the new squawk code or Flight ID will

replace the previous value. If the code entry is not completed within 7

seconds, the changes are ignored and the previous code restored.

1200 VFR code in the USA

7000 VFR code commonly used in Europe.

7500 Hijack code

7600 Loss of communications

7700 Emergency code

The Flight ID should correspond to the aircraft call sign entered on

your flight plan. If no flight plan is active, the aircraft registration

should be used as your Flight ID. Use only letters and digits. If the

Flight ID is less than 8 characters long, entering a blank character will

end it.

Altitude Encoder Warm Up

The built in altitude encoder uses a sensor that is temperature

dependent. A small internal heater circuit keeps the sensor at the

correct temperature. When the ambient temperature is below 0C

there may be a delay between switching on the transponder and

seeing an altitude reported. In very cold weather this delay can be

several minutes. You should always switch on the transponder