Section 918
BECKER ATC 2000 Transponder
918 - 4 Page Date: 31. January 2006
Pilot´s Operating Handbook
EXTRA 300S
NOTE
The ATC 2000 owner accepts all responsibility for obtaining the proper license before
using the transponder.
Caution
Do not switch on or off the transponder until the engines have been startet or stopped
respectively to avoid damage to the transponder due to current surges.
918.1.1 BUILT-IN TEST
1 Position mode switch from OFF to SBY. Operate the transponder approx. 60s in the
SBY position since transmitting tube must warm up and stabilize prior to operation. It is,
however, possible to skip the SBY position without danger for the transmitter tube,
since the latter is safeguarded by cavity protection circuit which also requires approx.
60s to warm up.
2 Turn mode switch as far as it will go to TEST (key position) in which the transponder
simulates interrogation, prompting a reply. The reply indication is given by the reply
lamp illuminating.
918.1.2 SQUAWK SELECTION
Squawk selection is done with the four rotating knobs to provide 4096 identification codes.
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
7777 Military interceptor operations (Never squawk this code)
0000 Military use (Not enterable)
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.
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