Operation Theorem • 25
Once the operation starts and has received a Trigger In signal, the switch
module updates the relay pattern to that specified in the first entry of scanlist.
T
S
is the default debounce time for a switch module, i.e. 5ms for PXI-7931.
T
An
is the user specified scan delay time in the scanlist entry, indicating the time
between the relay being debounced and the exact moment that a measurement
device takes a new measurement. The actual delay time would be the greater
of the two times, to guarantee that measurement devices take measurements
after the signal path is fully settled, and the relays switch as close as possible to
their maximum operating speed.
As the scan delay time elapses, the switch module generates
Scanner
Advanced
signal to inform the measurement device to take a new
measurement.
After the measurement completes, the measurement device will generate
another
Trigger In
signal to have the switch module update the relay pattern to
that specified in the second entry of scanlist.
The handshaking process will continue, until it reaches the end of the scanlist
(if one-time scanning mode is selected), or when a software scan-abort
command is received.
Summary of Contents for PXI-7931
Page 10: ...4 Introduction This page intentionally left blank...
Page 13: ...Installation 7 Figure 2 Installing the switch module into a PXI platform...
Page 14: ...This page intentionally left blank 8 Installation...
Page 19: ...Signal Connection 13 Figure 5 2x4 Matrix II...
