Page Date: 31. March 2009
920 - 5
Pilot´s Operating Handbook
EXTRA 300L
Section 920
BECKER BXP 6401 Transponder
N O T E
The blind encoder is only powered if the transponder is not switched OFF (at least SBY).
A blind encoder needs a warm-up time (sometimes a several minutes). Therefore although
the solid state transponder needs no warm-up time, turn the transponder to SBY
immediately after starting the engine.
920.1.3
DISPLAY
Transponder’s code is displayed in the top line using high readability font, at all times in modes
SBY, ON, ALT. Depending on the configuration settings, the Aircraft Identification (AI) or Flight
Number (FN) is displayed in the bottom line. Flight level is displayed in ALT mode in the bottom
line of the display (altitude= FL x 100 in ft).
920.1.4
SQUAWK SELECTION
1 The transponder remains switched in the standby mode until requested by the ground station
(ATC) to transmit a code, e.g. „squawk alpha 6426“.
2 Using the rotary switch (B) and the button (C) set the 4-digit code requested by ATC as follows:
a Using switch (C) move the cursor to the particular digit. Digits 0 to 7 can then be set using the rotary
switch (B).
N O T E S
Whilst settings are taking place, the transmission branch of the transponder is inhibited
to prevent unintentional transmission.
If only two digits were named by ATC, e.g. „Squawk alpha 64“, then a zero is to be used
for positions three and four, i.e. „6400“.
b The last used code is stored in each case and is also activated when the transponder is switched
on.
IMPORTANT CODES:
1200 The VFR code for any altitude in the US (Refer to ICAO standards elsewhere)
7000 The VFR code commonly used in Europe (Refer to ICAO standards)
0021 The VFR code commonly used in Germany (default is set to 0021 at time of
installation)
7500 Hijack code (Aircraft is subject to unlawful interference)
7600 Loss of communications
7700 Emergency
Summary of Contents for 300L
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