Flight Operation In Mode A (Transponder Reply Code Only); Flight Operation In Mode A+C (Reply Code And Altitude Code); Squawk Ident; Test - Extra 200 Information Manual

Pilot´s Operating Handbook
EXTRA 200
Unintentional transmission of an emergency code is prevented in that the transponder
replies are inhibited whilst the code is being set. This applies particularly where the new
code is being set in the ON or ALT modes. Also if a special code is called up, no
transponder reply takes place during the period in which the previous code can be
reactivated (approximately 3 seconds).

919.1.4 FLIGHT OPERATION IN MODE A (TRANSPONDER REPLY CODE ONLY)

1 Select squawk as described above.
2 Set mode switch (A) from SBY to ON. The transponder immediality replies with the set code. A
triangle on the left next to the code signals the tranponder replies.

919.1.5 FLIGHT OPERATION IN MODE A+C (REPLY CODE AND ALTITUDE CODE)

1 Select squawk as described above.
2 ATC requests the transmission „alpha/charlie" or „charlie", switch the transponder to ALT using
mode switch (A).
3 The transponder replies using the code set and in response to mode C requests it tansmits the
flight level of the aircraft to ATC. A triangle on the left next to the code signals the transponder
replies.

919.1.6 SQUAWK IDENT

After a „squawk ident" request from ATC, press Ident button IDT (D) briefly. This transmits an
additional special pulse (SPI) for approx. 18 seconds, which enables the aircraft to be clearly
identified on the radar screen of the controller. 'Idt' appears in the bottom line of the LC display
during this time.

919.1.7 TEST

The following different tests are integrated in the transponder or can be triggered at the
transponder :
1 Automatic switching-on test, in which the display (E) is flashing with all digits for 3 seconds. The
unit is subject to a self-test in this time.
2 A permanent test runs in the background of the transponder operation. The built-in FPGA
organizes the required resources for this. The transmitter recognizes a missmatching or own
abnormal behavior and delivers an alarm signal to the FPGA.
Page Date: 28. February 2006
Note
Section 919
BECKER ATC 4401 Transponder
919 - 7