7751/7752/7753 Module Scanning - Keithley SourceMeter 2790 Reference Manual

Model 2790 SourceMeter
Channel setup
The <clist> parameter is used to set up scan channels. For example, the following exam-
ples show how to set up scan channel 101:
FUNC 'VOLT', (@101)
VOLT:RANG 10, (@101)
VOLT:DIG 4.5, (@101)
VOLT:NPLC 3, (@101)
klqb
Buffer
For front panel scanning, the reading count specifies the number of readings to store in the
buffer. For remote scanning, the sample count specifies the number of readings to store in
the buffer.
Readings stored in the buffer by the TRAC command (or by front panel data store opera-
tion) must be cleared before sending INITiate or READ? to take the instrument out of idle.
The following command clears the buffer:
TRACe:CLEar

7751/7752/7753 module scanning

klqb
Trigger model
The trigger model for memory pattern operation is shown in
ilar to 7702 scan operation, with the following significant differences:
Channel closure — Instead of a single channel closure, you can close multiple channels
with a single memory pattern definition.
Source levels — Source levels can be set by defining them in the memory location definition.
Measurements — Optionally, a DCV, Ω2, or Ω4 measurement function can be set up for
each memory location. You must set up at least one location for a measurement.
Scan setup
The <clist> parameter is used to set memory pattern locations. For example, the following
example sets up a scan through M1, M2, and M3:
ROUT:SCAN (@M1, M2, M3)
®
Switch System Reference Manual
In the above command sequence, channel 101 is first set for DCV before sending
the other commands to set range, digits, and rate. If channel 101 was instead set
to a different function (i.e., RESistance), the VOLT commands to set range, dig-
its, and rate would generate error +700 (Invalid function in chanlist).
See "Memory patterns" page 2-36
patterns. Once memory patterns are defined, they can be scanned by placing
them in the scan list as covered below.
' Set 101 for DCV.
' Set 101 for 10V range.
' Set 101 for 4 digit resolution.
' Set 101 rate for 3 PLC.
' Clear buffer.
for complete details on setting up memory
Figure 7-4. Operation is sim-
' Scan M1 to M3.
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