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National Instruments Corporation
5
TB-2705 PXI Terminal Block
SCANCLK
DGND
Output
Scan Clock—This terminal pulses
once for each A/D conversion in the
scanning modes when enabled. The
low-to-high edge indicates when you
can remove the input signal from the
input or switched to another signal.
EXTSTROBE
DGND
Output
External Strobe—This output is used
for controlling SCXI modules.
PFI0/TRIG1
DGND
Input
PFI0/Trigger 1—As an input, this
is either one of the programmable
function inputs (PFIs) or the source for
the hardware analog trigger. For more
information on PFI signals, see the
PXI E Series User Manual
.
Output
As an output, this is the TRIG1 signal.
In posttrigger data acquisition
sequences, a low-to-high transition
indicates the initiation of the
acquisition sequence. In pretrigger
applications, a low-to-high transition
indicates the initiation of the pretrigger
conversions.
PFI1/TRIG2
DGND
Input
PFI1/Trigger 2—As an input, this is
one of the PFIs.
Output
As an output, this is the TRIG2 signal.
In pretrigger applications, a
low-to-high transition indicates the
initiation of the posttrigger
conversions. TRIG2 is not used in
posttrigger applications.
PFI2/CONVERT
DGND
Input
PFI2/Convert—As an input, this is one
of the PFIs.
Output
As an output, this is the CONVERT*
signal. A high-to-low edge on
CONVERT* indicates the start of an
A/D conversion.
Table 1.
TB-2705 Terminal Block E Series Signal Descriptions (Continued)
Signal Name
Reference
Direction
Description
