
Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
DR7 Driver/Receiver Board F-7
DR7 Signal Description
Figure F-4: J200 and J201 Connectors
DRA I/O Channels (J200)
Table F-3: DR7, DRA I/O Channels (J200)
Name
Pin No.
Description
CH1+ to
CH32+
Various
(Bi-directional) RS-422/485 Positive High speed channels
CH1- to
CH32-
Various
(Bi-directional) RS-422/485 Negative High speed channels
SIG_GND
Various
Signal Ground reference
AUX1+ A
34
(Bi-directional) General Purpose RS-422/485 Positive I/O pin
AUX1- A
35
(Bi-directional) General Purpose RS-422/485 Negative I/O pin
AUX2+ A
36
(Bi-directional) General Purpose RS-422/485 Positive I/O pin
AUX2- A
37
(Bi-directional) General Purpose RS-422/485 Negative I/O pin
AUX3+ A
38
(Bi-directional) General Purpose RS-422/485 Positive I/O pin
AUX3- A
39
(Bi-directional) General Purpose RS-422/485 Negative I/O pin
AUX4+ A
40
(Bi-directional) General Purpose RS-422/485 Positive I/O pin
AUX4- A
41
(Bi-directional) General Purpose RS-422/485 Negative I/O pin
AUX5 A
42
(Bi-directional) General Purpose TTL I/O pin, 51.1 Ohm series
AUX6 A
44
(Bi-directional) General Purpose TTL I/O pin, 51.1 Ohm series
AUX7 A
84
(Bi-directional) General Purpose TTL I/O pin, 51.1 Ohm series
AUX8 A
86
(Bi-directional) General Purpose TTL I/O pin, 51.1 Ohm series
AUX9+ A
88
(Bi-directional) General Purpose ECL I/O pin, 51.1 Ohm to -2 V
AUX9- A
89
(Bi-directional) General Purpose ECL I/O pin, 51.1 Ohm to -2 V