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* MAX - maximum
* MHz - mega hertz
* N - normal
* NC - not connected
* norm - normal
* pnl - panel
* PSR - primary surveillance radar
* RA - resolution advisory
* REL - relative
* RF - radio frequency
* rptg - reporting
AIR TRAFFIC CONTROL SYSTEM - INTRODUCTION
EFFECTIVITY
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* RX - receive
* SDI - source destination identifier
* sig - signal
* SLS - side lobe suppression
* SSR - secondary surveillance radar
* SPI - special purpose identification
* stby - standby
* sw - switch
* TA - traffic advisory
* TAS - true air speed
* TCAS - traffic alert and collision avoidance system
* tpr - transponder
* TX - transmit
* XFR - transfer
* xmtr - transmitter
* xpdr - transponder
* xpndr - transponder
AIR TRAFFIC CONTROL SYSTEM - INTRODUCTION
EFFECTIVITY
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AIR TRAFFIC CONTROL SYSTEM - INTRODUCTION
AIR TRAFFIC CONTROL SYSTEM - INTRODUCTION
EFFECTIVITY
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General Description
These are the components of the ATC system:
* Top antenna
* Bottom antenna
* ATC coaxial switch (2)
* ATC/TCAS control panel
* ATC transponder (2).
The two antennas transmit signals from the ATC transponder
and send received signals to the ATC transponder. These
signals go through the ATC coax switches.
The ATC/TCAS control panel sends identification and control
data to the transponders. The ATC/TCAS control panel also
allows selection of either transponder 1 or transponder 2.
The air data inertial reference units (ADIRUs) supply barometric
altitude data to the ATC transponders.
The ATC transponders interface with the TCAS system.
The ATC transponders send and receive suppression pulses
through the suppression coax tees. This prevents ATC
transmissions from interfering with the DME and TCAS
system operations.
ATC SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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ATC SYSTEM - GENERAL DESCRIPTION
ATC SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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Flight Compartment
The ATC/TCAS control panel is on the P8 aft electronics panel.
Electronic Equipment Compartment
These are the ATC transponder system components in the
electronic equipment compartment:
* ATC transponder 1
* ATC transponder 2
* Program switch module (2)
* Top ATC coax switch
* Bottom ATC coax switch.
ATC Antenna Location
The ATC antennas are on the forward fuselage near the
centerline. The top ATC antenna is at STA 430.25. The bottom
ATC antenna is at STA 355.
ATC SYSTEM - COMPONENT LOCATION
EFFECTIVITY
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ATC SYSTEM - COMPONENT LOCATION
ATC SYSTEM - COMPONENT LOCATION
EFFECTIVITY
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General
The ATC coax switches get power through the ATC ANT
SWITCH circuit breaker. When you select ATC transponder 1 on
the ATC/TCAS control panel, the ATC coax switches do not
energize and the antennas connect to ATC transponder 1. When
you select ATC transponder 2, the ATC/TCAS control panel
sends a discrete ground to the ATC coax switches. This
energizes the coax switches and connects the top and bottom
antennas to ATC transponder 2.
ATC SYSTEM - ANTENNA INTERFACE
　
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