Operation Theorem
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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-
67921
.
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.
