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Color of GS prefix matches
navigation source.
Multifunction Display -- Navaid Sector Mode
Pilot’s and Copilot’s Instrument Panels
Time To Go
Indicates time to tuned
navaid or next waypoint.
Color matches navigation
source.
BRT
REV 56, Jan 31/03
Vol. 1 18--50--6
NAVIGATION SYSTEMS
Distance Measuring Equipment
Flight Crew Operating Manual MASTER
CSP A--013
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Distance
Measuring
Transceiver
DME 1 DC BUS 1 1 H10
Equipment
DME 2 DC BUS 2 2 H10
Vol. 1 18--60--1
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Air Traffic Control Transponder System
Flight Crew Operating Manual
CSP A--013
MASTER
1. AIR TRAFFIC CONTROL TRANSPONDER SYSTEM
The two air traffic control transponders (ATC 1 and ATC 2) provide ground radar beacon
systems with coded identification responses in the following modes:
S Mode A -- Aircraft identify reporting
S Mode C -- Altitude reporting
S Mode Select (S) -- Data link with other mode S transponders for the traffic alert and
collision avoidance system (TCAS).
Mode S data link includes air-to-air, ground-to-air (data uplink or comm A), air-to-ground
(data downlink or comm B), and multisite (ground station to ground station) messages. The
transponder code range is from 0000 to 7777, selectable through the RTU’s.
Air Traffic Control Transponder System --- Controls <MST>
Figure 18---60---1
Backup Tuning Unit
Center Pedestal
ATC SEL
Used to select ATC transponders.
1 -- ATC 1 transponder is activated
and ATC 2 transponder is on standby.
STBY -- Both transponders are on
standby.
2 -- ATC 2 transponder is activated
and ATC 1 transponder is on standby.
C
O
M
NAV
OFF
SBY
ON
SQ
OFF
FREQ
COM/NAV
1 RTU 2
STBY
1 2
ATC SEL
INHIBIT PUSH
FMS TUNE
INHIBIT
RTU 1
INHIB
RTU 2
INHIB
<0012>
Transponder codes are set on the top level page of the radio tuning units and can also be
set using the FMS control display unit. ATC identification is selected using the IDENT button
on the RTU.
Altitude reporting selection is made on the ATC main page of the radio tuning unit.
REV 56, Jan 31/03
Vol. 1 18--60--2
NAVIGATION SYSTEMS
Air Traffic Control Transponder System
Flight Crew Operating Manual MASTER
CSP A--013
Air Traffic Control Transponder System --- Radio Tuning Unit <MST>
Figure 18---60---2
Radio Tuning Unit -- Top Level Page
Center Pedestal
IDENT
Pushed at ATC request; causes an
additional identification pattern on ATC
ground radar screen.
Transponder Code (green)
Turns white when selected to standby.
Tuning Window (white)
TUNING KNOB
ATC Key
Push key once to tune frequency
with tuning knob. Push key twice to
select ATC main page.
Mode Messages (cyan)
STBY -- Both transponders are in
standby mode. Code turns white.
ALT OFF -- Mode C selected off.
ID -- Identification has been selected.
R -- Transponder is responding to an
interrogation.
<0012> <0012>
Vol. 1 18--60--3
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Air Traffic Control Transponder System
Flight Crew Operating Manual
CSP A--013
MASTER
ATC Transponder Interface <MST>
Figure 18---60---3
FMS
IAPS
ADC 1
ADC 2
DME 1/2
TCAS
ATC 1 ATC 2
PORT C
OUTPUT
DATA
PORT B
PORT A
24 PIN
STRAP
PORT C
OUTPUT
DATA
PORT B
PORT A
24 PIN
STRAP
UPPER UPPER
LOWER LOWER
X--TALK
ALT
ALT
ATC
SELECT
ATC
SELECT
SOURCE
SELECT
SOURCE
SELECT
SUPPRESSION IN/OUT
COORDINATION
& CONTROL
COORDINATION
& CONTROL
RTU 1 RTU 2
CBP4--D5
XPDR 1
DC
ESS
CBP2--H8
XPDR 2
DC
BUS
2
<0024><0050>
REV 56, Jan 31/03
Vol. 1 18--60--4
NAVIGATION SYSTEMS
Air Traffic Control Transponder System
Flight Crew Operating Manual MASTER
CSP A--013
Radio Tuning Unit --- Top Level Page <MST>
Figure 18---60---4
Radio Tuning Unit -- Top Level Page
Center Pedestal
IDENT
Pushed at ATC request; causes an
additional identification pattern on ATC
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