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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
DR1 Driver/Receiver Board B-1
Appendix B
DR1 Driver/Receiver Board
DR1 Features
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Channels: 32 single-ended LVTTL
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Relay Isolation on all I/O and AUX channels
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Selectable resistive input load to VCC (+3.3 V), ground or both
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Direct or 50 ohm selectable output impedance
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Auxiliary channels
– Four LVTTL with selectable output impedance and resistive input load
– Four LVTTL
– Four ECL (single ended or differential)
Front Panel Connectors
The front panel of the DR1 Driver/Receiver is shown in Chapter 3.
Block Diagram
This section describes the basic hardware configuration of the DR1
Driver/Receiver (DRA or DRB).
The DR1 is comprised of four major logic sections as shown in Figure B-1.
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Auxiliary Driver & Receiver I/O
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DR1 Driver & Receiver I/O
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Control Logic
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Firmware & NV Data