Front panel operation 11
The high measurement is triggered on the rising edge of the pulse (Figure 6) and an
integration is performed for the time specified for the high measurement. The falling edge of the
pulse triggers the low measurement, and an integration is performed for the time specified for
the low measurement. An average measurement is triggered on the rising edge, and covers both
the high and low periods of the pulse as specified by the average measurement time setting. The
Model 2306 computes one measurement parameter, high, low, or average, at a time. The desired
measurement mode on the front panel is selected with the up and down arrow keys.
NOTE
See Section 3 in the Model 2306 Instruction Manual for information on pulse
current step and digitizing commands.
The pulse measurement period T can be selected manually or be automatically set by the
Model 2306. First, the user must specify a trigger level that serves as a threshold to initiate
integration process, i.e., at t = 0. Once the trigger level is selected, the output is turned on and
the pulsed load is operational, the 2306 can be prompted to automatically determine the high
time, low time, and average time in pulsed current mode according to Figure 6. These parameters
may also be set manually from the front panel or over the GPIB bus.
Figure 6
Pulsed waveform
NOTE
The pulsed waveform in Figure 6 shows trigger level and the high, low, and average
times set by the Model 2306 using the auto-time feature.
Trigger
level
Average current
level
High current level
Low current level
High
time
Low
time
Average time
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