
Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
DR4 Driver/Receiver Board E-1
Appendix E
DR4 Driver/Receiver Board
DR4 Features
•
Channels: 48 single-ended variable voltage or 24 differential channels
•
Voltage range: -31 V to +31 V with an output swing of up to 31 V
•
Relay Isolation on all channel I/O
•
Selectable drive current
•
5
Ω, 50 Ω selectable output impedance
•
Over-current detection
•
Temperature Monitoring
•
16 TTL auxiliary channels
Front Panel Connectors
The front panel of the DR4 Driver/Receiver is shown in Chapter 3 (no
external power connector).
Block Diagram
The DR4 I/O Block Diagram (Figure E-1) describes the distribution of
resources of the DR4.