2400 Series SourceMeter
®
User’s Manual Pulse Mode Operation (Model 2430 only) 5-3
Pulse characteristics
NOTE For the purpose of discussion, positive polarity pulses are shown in the follow-
ing illustrations. Keep in mind that the Model 2430 can output negative pulses.
As shown in Figure 5-1, a pulse period consists of an output on-time (pulse width) and an
output off-time. Depending on how the SourceMeter is configured, the pulse width can be
as short as 150µsec or as long as 5msec. The output off-time can be as short as 1.1msec or
as long as ~10,000sec.
Figure 5-2 shows the components that make up the pulse width and the output off-time.
NOTE See the Model 2430 specifications in Appendix A for pulse rise and fall times.
Figure 5-2
Pulse-measure timing
80µs
Meas
Sig
2.9ms
Meas
Ref &
Zero
PD
Delay = Pulse width delay
80µs = Minimum pulse width overhead
Meas Sig = Signal measurement
2.9ms = Minimum output off-time overhead
Meas Ref & Zero = Reference and zero measurement
PD = Pulse delay setting
0V or 0A
Delay
Pulse Width
(Output On-Time)
Output Off-Time
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