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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
UR14 Driver/Receiver Board I-1
Appendix I
UR14 Driver/Receiver Board
UR14 Features
•
Channels: 32 Low Speed single-ended Open Collector Utility Pins
•
Voltage range: 0 to +30 V
•
Suitable for Inductive loads, internal clamping to ~42 V
•
+5V Pull-up allowing each channel to operate as low speed TTL.
•
Programmable input level detection (per byte) 0-20V
•
Programmable Over-current detection (per byte) 0-1A
•
External Probe Support
•
Auxiliary I/O channels:
-
Six programmable (Two are dedicated for the external probe when
used)
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Two LVTTL (One is dedicated for the external probe when used)
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Three ECL (single ended or differential)
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Four LVTTL or SE ECL
-
Four LVTTL or ECL (single-ended or differential)
See Figure I-1 for a front panel illustration of the UR14.
Block Diagram
The top level block diagram for the UR14 Driver/Receiver board is shown in
Figure I-2. More detailed diagrams of these blocks are featured in Figures
I-3 thru I-5.