7二次雷达 - 实际系统
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二次雷达（SSR） 电子信息工程学院
9Hale Waihona Puke Components -- Antenna
二次雷达（SSR）
电子信息工程学院
10
ATC coax switch
The ATC coax switches connect the active ATC transponder to the top and bottom ATC antennas. These are the electrical connector inputs: ATC antenna switch circuit breaker ATC/TCAS control panel. The ATC coax switches supply an RF interface for the ATC system interrogation and reply signals. These are the connectors: ATC transponder 1 connector ATC antenna connector ATC transponder 2 connector.
The transponder select switch is a two-position switch used to select ATC transponder 1 or ATC transponder 2 as the active transponder. The flight crew uses the code selectors to set the four digits of the identification code. The four digits show on the liquid crystal display (LCD). Codes are from 0000 to 7777, with 4096 different selections.
二次雷达（SSR）
电子信息工程学院
12
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
13
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
14
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
15
ATC/TCAS CONTROL PANEL
二次雷达（SSR） 电子信息工程学院
17
ATC/TCAS CONTROL PANEL
IDENT Switch. When the ATC controller requests the airplane identifier, the flight crew pushes the momentary IDENT switch. The transponder adds a special position identification (SPI) pulse to the interrogation reply for the next 18 seconds. Altitude Source Switch. Use the two-position switch to set the source of altitude data for the ATC transponder. XPNDR FAIL Light. The XPNDR FAIL light comes on for these conditions: Transponder failure; Antenna failure; Control data failure; Altitude input failure.
二次雷达（SSR）
电子信息工程学院
2
Introduction
The air traffic control (ATC) ground stations interrogate the airborne ATC system. The ATC transponder replies to the interrogations in the form of coded information that the ground station uses. The ATC transponder also replies to mode S interrogations from the traffic alert and collision avoidance systems (TCAS) of other airplanes or ground stations. When a ground station or a TCAS computer from another airplane interrogates the ATC system, the transponder transmits a pulse-coded reply signal. The reply signal identifies and shows the altitude of the airplane.
二次雷达（SSR）
电子信息工程学院
16
ATC/TCAS CONTROL PANEL
Transponder Mode Selector TEST - Starts an ATC transponder functional test. STBY (standby) - A ground discrete goes to both transponders. This ground discrete prevents operation of the transponder, but does not prevent built-in-test-equipment (BITE) functions. ALT RPTG OFF (altitude reporting off) - The reply does not contain an altitude report. XPNDR (transponder) - The active transponder responds to ATC interrogations. Mode C and Mode S altitude replies contain altitude information.
二次雷达（SSR） 电子信息工程学院
3
Introduction
二次雷达（SSR）
电子信息工程学院
4
Introduction
These are the components of the ATC system: Top antenna Bottom antenna ATC coax switch (2) ATC/TCAS control panel ATC transponder (2)
二次雷达（SSR）
电子信息工程学院
5
Introduction
二次雷达（SSR）
电子信息工程学院
6
COMPONENT LOCATION
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.
二次雷达（SSR） 电子信息工程学院
7
Introduction
二次雷达（SSR）
电子信息工程学院
8
Components -- Antenna
Purpose: The ATC L-band blade antenna receives 1030 MHZ interrogation signals from ATC ground stations and other airplanes that have TCAS. The ATC transponder transmits the reply signals through the L-band antenna. Physical Description: The coaxial cable connector connects to the antenna. The antenna has an O-ring moisture seal and attaches to the airplane by four screws. The ATC and DME antennas are the same and are interchangeable. 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.
二次雷达（SSR）
电子信息工程学院
11
ATC/TCAS CONTROL PANEL
The dual ATC/TCAS control panel controls the ATC transponder and the TCAS computer. These are the ATC controls and displays on the ATC/TCAS control panel: Transponder select switch Active system display Transponder code selectors Codes are from 0000 to 7777, with 4096 different selections. Four digit identification code (NO 7500, 7600 OR 7700) Transponder mode selector IDENT switch Altitude source switch Fail light
二次雷达（SSR）
中国民航大学 电子信息工程学院
outline
Introduction Components Antenna(2) ATC coax switch (2) ATC/TCAS control panel ATC transponder (2). Interface Self test
9Hale Waihona Puke Components -- Antenna
二次雷达（SSR）
电子信息工程学院
10
ATC coax switch
The ATC coax switches connect the active ATC transponder to the top and bottom ATC antennas. These are the electrical connector inputs: ATC antenna switch circuit breaker ATC/TCAS control panel. The ATC coax switches supply an RF interface for the ATC system interrogation and reply signals. These are the connectors: ATC transponder 1 connector ATC antenna connector ATC transponder 2 connector.
The transponder select switch is a two-position switch used to select ATC transponder 1 or ATC transponder 2 as the active transponder. The flight crew uses the code selectors to set the four digits of the identification code. The four digits show on the liquid crystal display (LCD). Codes are from 0000 to 7777, with 4096 different selections.
二次雷达（SSR）
电子信息工程学院
12
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
13
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
14
ATC/TCAS CONTROL PANEL
二次雷达（SSR）
电子信息工程学院
15
ATC/TCAS CONTROL PANEL
二次雷达（SSR） 电子信息工程学院
17
ATC/TCAS CONTROL PANEL
IDENT Switch. When the ATC controller requests the airplane identifier, the flight crew pushes the momentary IDENT switch. The transponder adds a special position identification (SPI) pulse to the interrogation reply for the next 18 seconds. Altitude Source Switch. Use the two-position switch to set the source of altitude data for the ATC transponder. XPNDR FAIL Light. The XPNDR FAIL light comes on for these conditions: Transponder failure; Antenna failure; Control data failure; Altitude input failure.
二次雷达（SSR）
电子信息工程学院
2
Introduction
The air traffic control (ATC) ground stations interrogate the airborne ATC system. The ATC transponder replies to the interrogations in the form of coded information that the ground station uses. The ATC transponder also replies to mode S interrogations from the traffic alert and collision avoidance systems (TCAS) of other airplanes or ground stations. When a ground station or a TCAS computer from another airplane interrogates the ATC system, the transponder transmits a pulse-coded reply signal. The reply signal identifies and shows the altitude of the airplane.
二次雷达（SSR）
电子信息工程学院
16
ATC/TCAS CONTROL PANEL
Transponder Mode Selector TEST - Starts an ATC transponder functional test. STBY (standby) - A ground discrete goes to both transponders. This ground discrete prevents operation of the transponder, but does not prevent built-in-test-equipment (BITE) functions. ALT RPTG OFF (altitude reporting off) - The reply does not contain an altitude report. XPNDR (transponder) - The active transponder responds to ATC interrogations. Mode C and Mode S altitude replies contain altitude information.
二次雷达（SSR） 电子信息工程学院
3
Introduction
二次雷达（SSR）
电子信息工程学院
4
Introduction
These are the components of the ATC system: Top antenna Bottom antenna ATC coax switch (2) ATC/TCAS control panel ATC transponder (2)
二次雷达（SSR）
电子信息工程学院
5
Introduction
二次雷达（SSR）
电子信息工程学院
6
COMPONENT LOCATION
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.
二次雷达（SSR） 电子信息工程学院
7
Introduction
二次雷达（SSR）
电子信息工程学院
8
Components -- Antenna
Purpose: The ATC L-band blade antenna receives 1030 MHZ interrogation signals from ATC ground stations and other airplanes that have TCAS. The ATC transponder transmits the reply signals through the L-band antenna. Physical Description: The coaxial cable connector connects to the antenna. The antenna has an O-ring moisture seal and attaches to the airplane by four screws. The ATC and DME antennas are the same and are interchangeable. 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.
二次雷达（SSR）
电子信息工程学院
11
ATC/TCAS CONTROL PANEL
The dual ATC/TCAS control panel controls the ATC transponder and the TCAS computer. These are the ATC controls and displays on the ATC/TCAS control panel: Transponder select switch Active system display Transponder code selectors Codes are from 0000 to 7777, with 4096 different selections. Four digit identification code (NO 7500, 7600 OR 7700) Transponder mode selector IDENT switch Altitude source switch Fail light
二次雷达（SSR）
中国民航大学 电子信息工程学院
outline
Introduction Components Antenna(2) ATC coax switch (2) ATC/TCAS control panel ATC transponder (2). Interface Self test