User manual

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

following illustrations. Keep in mind that the Model 2430 can output neg

ative 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. With measurement

enabled, the output off-time can be as short as 2.9msec or as long as

~10,000sec. The shortest output off time is 1.1msec with measurements disabled.

See Table 5-1, “SourceMeter pulse mode timing summary” for details.

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.

Figure 5-2

Pulse-measure timing for default source-measure configuration.

80µs

Meas

Sig

2.9ms

Meas

Ref &

Zero

Delay = Pulse width delay, used to achieve pulse width setting.

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, used to determine time between pulses.

0V or 0A

Delay

Pulse Width

(Output On-Time)

Output Off-Time