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AUTOMATIC DIRECTION FINDER (ADF) SYSTEM (CONT'D)
ADF Failure Indication
The ADF system failure is displayed as follows.
• The ADF frequency display on the RTU top level page is replaced with dashes.
• On the pilot’s and copilot’s PFDs and MFDs, the applicable bearing pointer is removed.
• The applicable magenta or cyan bearing source indicator is replaced with a red boxed
bearing source indicator.
ADF Self-test
To conduct the self-test, the ADF receiver must be in the ADF mode, with a valid NDB
frequency tuned in. The self-test is started by pushing the ADF TEST key on the RTU ADF main
page. During the test, the bearing pointer rotates 90 degrees counterclockwise and the tone
generator activates. The self-test is completed when the bearing pointer returns to its original
bearing.
Controls and Indicators
The figures that follow outline the controls and indications relevant to ADF navigation. Refer to
Chapter 6, Communications, and Chapter 11, Flight Instruments, for additional information on the
radio tuning unit (RTU) and EFIS displays.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−56
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AUTOMATIC DIRECTION FINDER (ADF) SYSTEM (CONT'D)
ADF Bearing Display (PFD)
Figure 17−10−51
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−57
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AUTOMATIC DIRECTION FINDER (ADF) SYSTEM (CONT'D)
ADF Bearing Display (MFD)
Figure 17−10−52
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−58
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AUTOMATIC DIRECTION FINDER (ADF) SYSTEM (CONT'D)
ADF Controls (RTU/Audio Control Panel)
Figure 17−10−53
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−59
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM
Description
The ATC transponder system is an automatic altitude and identification reporting unit, which
responds to ground ATC interrogators and airborne traffic alert and collision avoidance system
(TCAS) interrogators.
There are two air traffic control transponders, ATC 1 and ATC 2. The transponders have three
modes of operation:
• Mode A – aircraft identity reporting
• Mode C – altitude reporting
• Mode S – data links with other mode C and S transponders for the traffic collision
avoidance system (TCAS)
Components and Operation
Transponder
The solid-state transponders receive and decode air traffic control interrogations and reply
automatically. The system can receive but cannot reply to interrogations when on the ground.
The ATC 1 system 1 is powered by the DC essential bus, and the ATC 2 system is powered by
DC bus 2.
Antennas
Each transponder system has two paired antennas. Each system has an upper and lower
antenna, located on the forward fuselage.
Controls and Indicators
ATC Selector Knob
The ATC selector knob is located on the REVERSIONARY/INHIBIT panel, on the center
pedestal. The selector has three positions: 1, STBY and 2. When ATC 1 transponder is
selected, it uses altitude information from ADC 1 to respond to mode C and mode S
interrogations. ATC 2 receives altitude information from ADC 2. When either transponder is
selected, the RTU four-digit identification code turns green. When in STBY, the RTU code is
white.
NOTE
In RVSM airspace, the pressure altitude source for the transponder
must be the same as the pressure source used by the automatic
altitude control system (i.e., the flight director and autopilot). If flight
director 1 is in use, select ATC 1 as the transponder. If flight director
2 is in use, select ATC 2 as the transponder.
Code Selection
Selection of ATC identification code and altitude reporting are performed via the ATC main page
on the RTUs. The TUNE page on the FMS permits manual selection of the ATC code.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−60
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR TRAFFIC CONTROL (ATC) TRANSPONDER SYSTEM (CONT'D)
Transponder Controls (RTU)
Figure 17−10−54
Transponder Controls (Reversionary/Inhibit Panel)
Figure 17−10−55
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−61
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS)
　
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