*
Vector generation logic
*
Weather radar logic
*
Data compression/transmission.
The core processor bus interface communicates with the processor CCA. It supplies the protocol for the data transfers between the GG CCA and the processor CCA.
The vector generation logic creates these display functions:
*
Lines
*
Arcs
*
Characters
*
Background shading colors.
The vector generation logic receives graphics instructions from the core processor bus interface. The vector generation logic supplies the display format data to the data compression/ transmission logic.
The weather radar logic does these functions:
*
Receives weather radar ARINC 453 data from the left and right weather radar receiver-transmitters
*
Creates raster type map image for display
*
Calculates and adjusts the radar data to correct for airplane motion
*
Supplies the weather radar data to the data compression/ transmission logic.
The data compression/transmission logic:
*
Combines data from the vector generation logic and the weather radar logic
*
Compresses the data
*
Transmits the data to the display units.
The data compression/transmission logic has a display unit video bus transmitter. The transmitter sends image data to the display units at a 125 Mbit per second rate. The data compression/transmission logic receives transmission instructions from the core processor bus interface.
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General
The core processor module/communications (CPM/Comm) uses the same hardware as the CPM/Basic and additional hardware to supply unique interfaces not supplied by the IOMs.
The CPM/Comm does the calculations for these systems:
*
Flight data recorder system
*
Central maintenance computing system
*
Data communication management system.
CPM/Comm Hardware
In addition to the five standard CCAs, the CPM/Comm has two additional CCAs. The two CCAs are the multifunction CCA and the fiber optics CCA.
Multi-Function CCA
The multifunction CCA has these interfaces:
*
Core processor bus interface
*
Datalink ARINC 618 interface
*
FDR ARINC 717 interface
*
QAR ARINC 717 interface
*
QAR RS422 interface.
The core processor bus interface supplies the protocol for the data transfers between the processor CCA and the:
* Datalink ARINC 618 interface
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*
FDR ARINC 717 interface
*
QAR ARINC 717 interface
*
QAR RS422 interface
*
Fiber optics interface in the fiber optics CCA.
The datalink ARINC 618 interface does these functions:
*
Receives data modulated on tones from the center or right VHF communication transceiver
*
Demodulates the tones and determines the message data
*
Transmits the message data to the DCMF.
The datalink ARINC 618 interface also does these functions:
*
Receives message data from the DCMF
*
Modulates audio tones with the message data
*
Transmits the data modulated on the audio tones to the center or right VHF radio.
The datalink ARINC 618 interface also transmits faults to the DCMF.
The center VHF communication transceiver interfaces with the CPM/Comm in the left AIMS cabinet. The right VHF communication transceiver interfaces with the CPM/Comm in the right AIMS cabinet.
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The FDR ARINC 717 interface receives data from the DFDAF software. The FDR ARINC 717 interface in the right AIMS cabinet transmits the data to a relay in the left AIMS cabinet. The DFDAF software in the left AIMS cabinet controls the relay and selects between the data received from the DFDAF in the left AIMS cabinet and the data received from the right AIMS cabinet. The FDR ARINC 717 interface in the left AIMS cabinet transmits the selected source of data from this relay to the FDR. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：777 AMM 飞机维护手册 指示和记录系统 1(38)
