**ON A/C 051-099,
Energization of the system is through a 115VAC/400 Hz bus:
-1XP via the sub-busbar 101 XP-C for transceiver 1,
-2XP via the sub-busbar 202 XP-A for transceiver 2.
Energization of the weather radar control unit and of the WR antenna drive
is through the selected transceiver.
Consumption of the transceiver is 145 W maximum.
R **ON A/C 106-149, 201-299, 301-399, 401-499,
Energization of the system is through a 115VAC/400 Hz bus:
-1XP via the sub-busbar 101 XP-C for transceiver 1.
Energization of the weather radar control unit and of the WR antenna drive
is through the transceiver.
Consumption of the transceiver is 145 W maximum.
**ON A/C ALL
The system is supplied through this circuit breaker:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
121VU COM NAV/RADAR/1 5SQ1 K13
**ON A/C 051-099,
121VU COM NAV/RADAR/2 5SQ2 K14
1EFF : ALL 1 34-41-00Page 23 1 1 Config-3 Aug 01/05 1 1 1CES 1R **ON A/C ALL
5. Interface
_________
A. Digital Interface Special for Weather Radar The weather radar data are transmitted via ARINC 429 and 453 buses in compliance with ARINC 708A. The table below contains all the output parameters in the digital form.
-------------------------------------------------------------------------------| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | -------------------------------------------------------------------------------|EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| | | | | | | | | | |CONV | -------------------------------------------------------------------------------| 055 | WXR DATA | | | |1600|7.82| DIS| | | | | | | | | | | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 270 | CONTROL | | | | 32 |100 | DIS| | | | | WORD 1 | | | | | | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 271 | CONTROL | | | | 32 |100 | DIS| | | | | WORD 2 | | | | | | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 356 | Mainte-| | | | |100 |ISO5| | | | | nance | | | | | | | | | | | message | | | | | | | | | | | word | | | | | | | | | -------------------------------------------------------------------------------
R 1EFF : ALL 1 34-41-00Page 24 1 1 Config-3 May 01/05 1 1 1CES 1
(1)
Control Words (Labels 270 and 271) The control words are transmitted on the control buses which connect the weather radar control unit to the transceiver. The control word 1 (label 270) provides the following data:
-gain,
-tilt angle,
-selected mode,
-stabilization (on/off),
-scan angle (normal/reduced),
-anticlutter (on/off) (optional)
-split function (Capt/Both/F/O) (optional)
The control word 2 (label 271) provides the following data:
-range,
-anticlutter (on/off) (optional),
-WR selected on the EFIS control section (master/slave).
(2)
Data Word (Label 055) The signal transmitted on the data bus line which connects the WR/PWS to the Display Management Computers (DMC) complies with data word format (label 055) as defined by the ARINC Specification 708A (Appendix 15.2). The data bus line transmits 190 data words per second; each word is made up of 1600 bits sent on 1 Megabit/s frequency (ARINC Specification 453) as per MANCHESTER II BI PHASE 2 format. (Ref. Fig. 005) Data word message includes mainly the radar return intensity and windshear data.
R 1EFF : ALL 1 34-41-00Page 25 1 1 Config-3 May 01/05 1 1 1CES 1
Weather Radar - Manchester II Biphase Format
Figure 005
R 1EFF : ALL 1 34-41-00Page 26 1 1 Config-3 May 01/05 1 1 1CES 1 -----------------------------------------------------------------------------| BITS | FUNCTION | |----------|----------------------------------------------------------------| | 1-8 | Label 00101101 : 055 | | 9-10 | Control Accept | | 11 | Spare | | 12 | Windshear Caution | | 13 | Windshear Warning | | 14-15 | Turbulence and Weather Alert | | 16 | Anticlutter (not used) | | 17 | Sector Scan | | 18 | Stabilization Limits | | 19 | Cooling Transceiver | | 20 | Display Fault (not used) | | 21 | Calibration or Air Data Input | | 22 | Attitude Input | | 23 | Control or Heading Input | | 24 | Antenna | | 25 | R/T or Radio Altimeter | | 26 | Stabilization | | 27-29 | Mode | | 30-36 | Tilt Angle | | 37-42 | Gain | | 43-48 | Range | | 49 | Windshear External Input Fault | | 50-51 | Data Accept | | 52-63 | Scan Angle | | 64 | Windshear Failure | | 65-1600 | Range Bin Data | ----------------------------------------------------------------------------- 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM NAVIGATION 导航3(30)
