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1-34 Getting Started Model 2750 Multimeter/Switch System User’s Manual

Trigger and return readings — remote programming

There are several commands used to trigger and return readings. The proper commands

and sequence to use depend on trigger state (continuous or non-continuous) and what you

are trying to accomplish.

Presented here are three fundamental command sequences that can be used to “trigger and

return readings.” These three command sequences (exercises) will accommodate most

basic measurement scenarios. Simply use the command sequence (exercise) that satisfies

your needs:

• Exercise 4 — Trigger and return a single reading

• Exercise 5 — Trigger and return multiple readings

• Exercise 6 — Return a single reading (continuous triggering)

Details on the commands to trigger and return readings are provided in other sections of

this manual. For details, refer to the following sections:

Section 3 — See “Trigger and retrieve readings” in Table 3-8.

Section 7 — For scanning, see “Trigger commands” in Table 7-1.

Section 8 — Explains the triggering process.

Section 13 — Covers Signal Oriented Measurement Commands (i.e., FETCh?, READ?).

Section 15 — See Table 15-9 (Trigger command summary).

Appendix D — Shows how trigger and read commands control data flow within the

instrument.

NOTE Each exercise indicates the commands used to configure triggering. Once

triggering is configured, the commands to trigger and/or return readings can

be repeated as often as desired (unless noted otherwise).

Exercise 4 — Trigger and return a single reading

Exercise 5 — Trigger and return multiple readings

Trigger controlled measurements — The instrument is typically used in a non-continu-

ous trigger mode. In this mode, commands are used to trigger one or more readings. After

the specified number of readings are completed, the measurement process stops.

Exercise 4 in Figure 1-9 provides a command sequence to trigger and return one reading.

Exercise 5 in Figure 1-10 provides a command sequence to trigger and return multiple

readings.

Exercise 6 — Return a single reading (continuous triggering)

Readings can be returned while the instrument is in the continuous measurement (trigger)

mode. Each time a read command is sent, the latest reading is returned. Exercise 6 in

Figure 1-11 provides a command sequence to return a single reading while in the continu-

ous trigger state.

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Keithley 2750 User Manual

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