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Model T940 User Manual
Publication No. 980938 Rev. K
DR2 Driver/Receiver Board C-4
Astronics Test Systems
Chapter 5
.
AUX [9:12]+
Four bipolar/positive differential signals used to input or
output test signals. See
in
Chapter 5
.
DR2 Driver & Receiver I/O
Figure C-3 illustrates the configuration and control of the DR2 Driver &
Receiver I/O (LVDS).
DB
FRONT
PANEL
DATA
EN
RH
AUX [1:4]+, CH [1:32]+
100
Ω
20K
Ω
20K
Ω
RL
AUX [1:4]-, CH [1:32]-
VCC
GND
SN65LVDM176D
SN65LVDM176D
Figure C-3: DR2 Driver & Receiver I/O Block Diagram
Signal Descriptions
DATA
Channel and auxiliary data output signals from the Data
Sequencer to the LVDS output drivers.
EN
Channel and auxiliary enable output signals from the Data
Sequencer to the LVDS output drivers.
RH
Response High input signals to the Data Sequencer from
the LVDS input receivers. 1 = good 1, 0 = good 0.
RL
Response Low input signals to the Data Sequencer from
the LVDS input receivers. 0 = good 0, 1 = good 1.
AUX [1:4]+
Four positive differential LVDS signals used to input or
output test signals. See
Configuring the AUX Channels
in
Chapter 5
.
AUX [1:4]-
Four negative differential LVDS signals used to input or
output test signals. See
Configuring the AUX Channels
in
Chapter 5
.
CH [1:32]+
These are UUT Bi-directional positive differential LVDS I/O
channels from the DR2 Drivers and Receivers
CH [1:32]-
These are UUT Bi-directional negative differential LVDS
I/O channels from the DR2 Drivers and Receivers
Control Logic
The control logic contains the registers, memory and logic that allow the