Foreground And Background Scan Execution; Pseudocards - Keithley 3700 series Reference Manual

Section 7: Scanning
Range example (sequential): 1003:1005 will add channels 1003, 1004, 1005 to the list as
three distinct steps with Channel 3 added first, Channel 4 added second, and Channel 5 added
third.
Adding channels to the scan list individually (instead of as a range) will allow the steps to be
executed in the order they were added (rather than sequentially).
Individual example (non-sequential): Adding individual channels in the order of 1003, 1005,
and 1004 will add the channels to the list as three distinct steps with Channel 3 added first,
Channel 5 added second, and Channel 4 added last.

Foreground and background scan execution

A scan may be executed in the foreground or background. Background execution allows
querying of settings or access to reading buffer data. If a scan is running in the foreground, it will
need to complete or be aborted before any settings may be queried or reading buffers
accessed.
NOTE

Pseudocards

A pseudocard can be "installed" in any empty slot. With the 3720 pseudocard "installed," the
instrument will operate as if a Model 3720 Thermocouple MUX card is installed in the slot. This
allows the user to configure a scan and exercise its operation before the switching module is
installed in the Series 3700. Use the following commands to install Series 3700 pseudocards in
empty slots:
For no pseudocard selection (use to remove an existing pseudocard):
slot.PSEUDO_NONE or 0
Model 3720 for Dual 1x30 multiplexer card simulation:
slot.PSEUDO_3720 or 3720
Model 3721 for Dual 1x20 multiplexer card simulation:
slot.PSEUDO_3721 or 3721
Model 3722 for Dual 1x48 multiplexer card simulation:
slot.PSEUDO_3722 or 3722
Model 3723 Dual 1x30 reed multiplexer card simulation:
slot.PSEUDO_3723 or 3723
Model 3730 6 x 16 high density matrix card simulation:
7-2
Scanning operations run through the trigger model, but individual open, close, and
DMM measure commands have no interaction with the trigger model.
Series 3700 System Switch/Multimeter Reference Manual
Document Number: 3700S-901-01 Rev. A / August 2007