Keithley 2010 User Manual page 88

3-26 Measurement Options
Timing
Another configuration option for stepping and scanning is the timing of channel closures. The
example in
operations. These are the timer control source and the delay block shown in the trigger models
in Figure 3-12
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When using both the timer and delay parameters, the timer is not started until after the delay.
For example, if the timer is two minutes and the delay is ten seconds, the timer is not started until
ten seconds after pressing SCAN. Each successive scan will occur at 2:10.0, 4:10.0, etc.
If the total delay time per scan is greater than or equal to the timer setting, the timer condition
is already satisfied and is ignored.
Figure 3-15 shows how different settings of TIMER and DELAY affect these
and Figure 3-13.
With the timer ON and set to five seconds and delay set to AUTO, channels are stepped
through at five second intervals with an output trigger after each closure. A scan
operation yields ten channels scanned immediately with an output trigger at the end of
the scan.
With the timer OFF and the delay set to MANual for five seconds, stepping and scanning
through the channels is timed the same. The difference is in the number of output
triggers, with stepping sending a trigger after each channel closure and scanning sending
a trigger at the end of the scan.