Side-Power SEP 100/185 T Servisní příručka stáhnout pdf (Strana 171)

Page Date: 4. Februar 2011 911 - 7

Pilot´s Operating Handbook

EXTRA 330LX

Section 911

BECKER ATC 4401 Transponder

Avoid selecting code 7500 and all codes in the 7600-7777 range. These trigger special indicators

in automated facilities. Only the code 7500 will be decoded as the hijack code. An aircraft’s

transponder code (if available) is utilized to enhance the tracking capabilities of the ATC facility,

therefore care should be taken when making routine code changes.

N O T E

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).

911.1.4 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.

911.1.5 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.

911.1.6 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.

911.1.7 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.

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Side-Power SEP 100/185 T Servisní příručka Strana 171