Foreground And Background Scan Execution; Include Multiple Channels In A Single Scan Step - Keithley 708B Reference Manual

Models 707B and 708B Switching Matrix Reference Manual
The menu contains the following items:
•
BACKGROUND: Runs scan list in the background
•
CREATE: Displays Use INS key
•
LIST: Displays the current scan list steps. Turn the navigation wheel to scroll through the list.
•
CLEAR: Clears the existing scan list.
•
RESET: Resets the unit's scan settings, which include scan count, clearing the scan list, and
scan stimulus settings like scan trigger arm.
Press the INS key to add the selected channels or pattern to the existing scan list.
Press the DEL key to remove the selected channels or pattern from the existing scan list. Only the
first occurrence of the selected item is removed.
When removing channels, channel patterns are not checked to determine if the channel being
removed is associated with its image. To remove a channel pattern in a scan list, select the channel
pattern to be removed, and then press the DEL key.
Press the STEP key to single step through a scan list.

Foreground and background scan execution

You can execute a scan in the foreground or background. Background execution allows you to query
settings. If a scan is running in the foreground, it will need to finish or be aborted before you can
query any settings.
When a scan is running in the background, you can send commands to be processed. The
commands that you can use include most of the command messages that you use to query for
settings, for example:
print(scan.state())
Most of the commands to change how the instrument is configured will log the following error
message to the error queue:
5522, Scan Running, Must Abort Scan

Include multiple channels in a single scan step

Through the remote control interface, you can use scan.addimagestep to combine a list of
channels into a scan step.
The following example creates five scan steps with the indicated channels.
scan.create()
scan.addimagestep("1A01, 1B01, 1C03")
scan.sddimagestep("1A03, 1B03, 1C03")
scan.addimagestep("1A05, 1B05, 1C03")
scan.sddimagestep("1A07, 1B07, 1C03")
scan.addimagestep("1A09, 1B09, 1C03")
707B-901-01 Rev. A / August 2010
Section 3: Functions and features
3-7