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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
UR14 Driver/Receiver Board I-17
DUT offsets are applied to the external probe module.
When not used with the external probe this signal comes
from the UUT and can be used to offset the reference
levels up to ±3V. Excursions of DUT_GND beyond ±390
mV with respect to signal ground yields a GND FAULT
signal.
PROBE
Probe Master 100 MHz probe assembly MODEL PM6139
that includes a push button and LED that connect to the
External Probe Module via an included cable and
connector.
CONNECT SWITCH is a push button on the PROBE that is used to signal a
sequence start to the T940 Sequencer via PBUT.
CONNECT LED is an LED on the PROBE that, when lighted, indicates
contact detection.
PROBE DETECT this input detects the presence of an external probe
module. When detected the API functions for the UR14
probe are activated.
CBUS
An internal Control Bus connecting the VXI Bridge to the
Data Sequencers and the Driver/Receiver board’s Control
Logic.