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The KAD/CBM/101 is a coherent CCDL bus monitor. It separately parses (triple buffers) data from four independent buses.
Each channel consists of a bit finder followed by a serial to parallel converter. After a valid preamble, 32 16-bit words with no bit errors, and a valid postamble the message is considered valid. Each valid message is then stored, along with the time the first bit of the preamble appeared and the message count for that channel. The message PARSER then waits for the next message.
Errors reported include bad bit after preamble and postamble not correct. In the event of an error message the PARSER will immediately start looking for the next preamble.
Features
- Parses 4 x 2.5 MHz CCDL busses
- Coherently stores 32 traffic words per bus
- Adds stale, skipped, and empty tags per message
- Adds message count and time tags per message
- Detects bit errors, and message length errors
- Features message counters on all four busses
Applications
- CCDL bus monitoring