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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
DR3e Driver/Receiver Board D-9
Description
Characteristics
Power Input Using Optional Front
Panel Power Input Connector
(for Pin Electronics devices)
V+: 10 to 28 V
V-: -4 to -19 V
V+ to V- delta: <32 V
Pin Electronics Monitoring
(per channel)
All programmed levels
Output and Input levels
Temperature
Channel Over-voltage Protection
Clamped to 0.4 V beyond V+ or V-
•
Max current 200mA for < 10ms
Auto Shutdown:
•
DC level within 1 V of V+ or V-
•
A 5 µs spike exceeding V+ or V-
Channel Capacitance
<120 pF
Channel Crosstalk
<250 mV
pk-pk
Voltage Monitoring
(per Driver/Receiver board)
V+, V- and Front Panel DUT_GND
Hybrid Connection
(per Driver/Receiver board)
Connects Front Panel pin to any channel via
the Pin Driver electronics. (User must disable
the drive enabled to the channel.)
~40 Ω series impedance, ~3 MHz bandwidth
Auxiliary I/O Channels (per
Driver/Receiver board)
Programmable Level (4)
LVTTL (4)
ECL (4)...Single Ended or Differential
AUX I/O is bi-directional
Relay isolation
* This range is limited by the V+ and V- levels.
1
700 mV at the fastest slew rate
I/O Min/Max Levels
The I/O level minimum and maximum values are determined by the V+ an V-
bias voltage levels. The following table lists the min and max levels based on
the V+ and V- level:
Table D-2: DR3e I/O Min/Max Levels Front Panel
Level
Min
Max
Units
DVH
V- + 5
V+ - 3
V
DVL
V- + 4
V+ - 7
V
CVH
V- + 2
V+ - 7
V
CVL
V- + 2
V+ - 7
V
Vcom High (CMH)
V- + 2
V+ - 7
V
Vcom Low (CML)
V- + 2
V+ - 7
V