Curtiss-Wright Defense Solutions

KAD/BCU/101 IRIG-106 backplane controller and encoder with dual modulation output

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The KAD/BCU/101 functions as two modules in one; an encoder and a backplane controller. The encoder is functionally identical to the KAD/ENC/005 and encodes data from any Acra KAM-500 module in an IRIG-106 Chapter 4 PCM stream.

Parameters to be transmitted are stored in pre-defined locations in RAM. Each parameter has a word definition that includes the bits per word, Most Significant Bit (MSB) (sent first or last), and parity. The encoder has differential ended RS-422 outputs for clock and data, along with buffered TTL outputs for NRZ-L and the bit/word/minor-frame/major-frame pulses.

Up to 15 formats (instruction sequences), can be stored at any time. Format selection is via four single-ended discrete (0-5V) input pins on the I/O (Input/Output) connector. As up to 64 chassis can be programmed using a single programming link, there are also six discrete I/O pins to set a chassis number. These six inputs are pulled to ground internally if left open circuit.

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KAD/BCU/101 Product Sheet

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Features

Encoder
- 100% IRIG-106 compliant
- Fully programmable
- Up to 10 PCM codes at up to 20 Mbps
- 5 to 250k words per major frame
- 5 to 32k words per minor frame
- 4 to 64 bits per word, with even, odd or no parity
- Supports any sync word and sub-frame strategy
- ARINC-573/717 compatible output
Controller
- Stores up to 15 formats
- Supports dynamic format switching
- Can operate as a master or slave chassis in distributed systems
- Supports fast programming
- Supports Cyclical Redundancy Checking (CRC) insertion at the end of minor frames

Applications

PCM encoding

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