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PSP 605−6
AUTOMATIC DIRECTION FINDING SYSTEM (CONT'D)
ADF Bearing Indications
Figure 17−10−56
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM
Description
The two ATC transponders operate as an air traffic control radar beacon system, which
automatically responds to interrogations. The ATC transponder system includes the following reply
modes:
• Mode A – Provides a reply that includes an identification code.
• Mode C – Provides a reply containing the aircraft’s encoded pressure altitude.
• Mode S – Provides a reply containing an ICAO address code that is unique to the aircraft,
and includes expanded data communication capabilities.
Components and Operation
Each ATC system includes two paired antennas, located on the top and bottom of the fuselage,
and two transponders installed in the avionics compartment.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−56
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM (CONT'D)
ATC System Components
Figure 17−10−57
ATC Transponder Control
Control of the ATC transponders may be carried out using the control display units associated
with the flight management system. Alternatively, the cursor control panels may be used to
control an ATC/TCAS control menu presented on the MFDs.
ATC Transponder Control – CDU
TUNE Page
The first TUNE page includes two line keys which input to the ATC system, one on each side
of the display. The left line key is used to enter the ATC code. The four digit code (0000 to
7777) is first entered on the scratchpad, and transferred to the ATC via the line key adjacent to
the ATC title.
The right line key is a mode selection line key providing input to ATC and TCAS. It allows the
crew to select from the following modes: STBY, TA/RA, TA ONLY, ALT ON and ALT OFF. The
ATC transponder is fully functional in all modes except for STBY (standby). The altitude
reporting function of the ATC is off when ALT OFF is selected. See the TCAS section in this
chapter for additional information on the remaining operating modes.
The second TUNE page, accessed by selection of the NEXT function key, includes a line key
for entering the aircraft FLIGHT ID. The FLIGHT ID is first entered on the scratchpad, then
transferred to the FLIGHT ID line by the line key adjacent to the ID space.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−57
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM (CONT'D)
CDU TUNE Pages 1 and 2
Figure 17−10−58
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−58
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM (CONT'D)
ATC/TCAS CONTROL Page
The ATC/TCAS CONTROL page is accessed from the TUNE page by selection of the line key
adjacent to the ATC title. The ATC/TCAS CONTROL page includes six line keys, which
provide input to the ATC system as follows:
• ATC 1 (2) – Used to set the active ATC code (similar to TUNE page). RPLY
annunciation, shown in cyan next to ATC code, indicates ATC is responding to an
interrogation.
• IDENT – Used to select the squawk ident function of the active transponder.
• SELECT – Used to select the active ATC transceiver (ATC 1 or ATC 2).
• FLIGHT ID – Used to set the active flight identification (similar to TUNE page).
• STBY/TA/RA/ALT ON/ALT OFF – Used for mode selection (similar to TUNE page).
ATC is functional in all modes except for STBY. Altitude reporting of ATC is off when
ALT OFF is selected.
• TEST – Enables a simultaneous test of both the ATC and TCAS systems. The ATC
transponder test is an internal functional test. When active, the TEST text enlarges for
approximately 10 seconds.
The page also indicates which ADC source is being used by the ATC. The source ADC is
indicated in cyan next to the IDENT text. In keeping with RVSM requirements, the flight
director/autopilot and ATC transponder must use the same pressure altitude source. Should
the crew select a flight control computer (FCC) transfer (XFR) from the flight control panel
(FCP), the ATC automatically switches ADCs in order to use the same altitude source as the
active FCC.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−59
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM (CONT'D)
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