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1-32
Simple scanning (7702)
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With a Model 7702 installed in the mainframe, the instrument can scan channels that are
valid for the selected function.
For front panel operation,
simple scan. The differences between the STEP function and the SCAN function involve
the reading count and the timer.
Reading count (RDG CT) — For both STEP and SCAN, the reading count specifies the
number of readings to store in the buffer. For STEP, the reading count determines the num-
ber of channels to scan.
For SCAN, the reading count also determines the number of scans to perform and is
best explained by an example. Assume there are 10 channels in the scan list (i.e., 101
through 110). If you set the reading count to 10 or less, one scan of the 10 channels will
be performed. If you set the reading count to any value from 11 to 20, two scans will be
performed. A reading count from 21 to 30 gives you three scans, and so on.
Timer interval (TIMER) — For the STEP function, the timer specifies the time delay
between scanned channels. For the SCAN function, the interval specifies the time delay
between scans. The timer starts when the scan is started. For SCAN, the next scan will not
start until the timer interval expires.
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Model 2790 SourceMeter
See
Section 7
for details on scanning.
Figure 1-6
The Model 2790 can also be configured to run an advanced scan. For an
advanced scan, each channel can have its own unique setup (i.e., function,
range, etc.). Advanced scanning is covered in
®
Switch System Reference Manual
shows the three basic steps to configure and run a
Section
7.
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