Contents
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SCXIbus Connector ........................................................................................ 3-3
SCXIbus Connector Signal Descriptions ........................................................ 3-4
Digital Interface............................................................................................................. 3-6
Digital Control Circuitry ............................................................................................... 3-7
Analog and Timing Circuitry ........................................................................................ 3-8
Analog Input Channels.................................................................................... 3-8
Excitation Output Channels ............................................................................ 3-11
Calibration....................................................................................................... 3-11
Analog Output Circuitry ................................................................................. 3-12
Single-Module Multiplexed Scanning.............................................. 3-15
Multiple-Module Multiplexed Scanning .......................................... 3-16
Multiple-Chassis Scanning ............................................................... 3-17
Chapter 4
Register Descriptions
Register Description Format ........................................................................... 4-1
SCXI-1121 Registers ...................................................................................... 4-1
Slot 0 Register Descriptions............................................................................ 4-5
Register Selection and Write Procedure ........................................... 5-2
Initialization...................................................................................... 5-4
Direct Measurements ........................................................................ 5-4
Indirect Measurements ..................................................................... 5-5
1. Data Acquisition Board Setup Programming ............................... 5-7
2. Module Programming................................................................... 5-10
3. Programming the Slot 0 Hardscan Circuitry ................................ 5-13
4. Acquisition Enable, Triggering, and Servicing ............................ 5-15