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IEEE-488 Reference

3-136

Parameters <name> = CONTinuous Continuous trigger mode

ONEShot One-shot trigger mode

Description This command is used to specify the basic trigger mode. With CONTinuous triggering, the Model

6517A will continuous trigger readings after the selected source event occurs (see :SOURce).

With ONEShot selected, a single reading will be triggered every time the selected source event

occurs.

:SOURce <name>

:SYSTem:MACRo:TRIGger:SOURce <name> Specify control source

Parameters <name> = IMMediate Immediate triggering

MANual Manual trigger event

BUS Bus trigger event

EXTernal External trigger event

TIMer Timer trigger event

Description This command is used to specify which control source will be used as the trigger event for instru-

ment readings. If in the continuous trigger mode (see :MODE), the instrument will continuously

make readings when the speciﬁed event occurs. If in the one-shot mode, each event will cause a

single-reading to occur.

With IMMediate selected, the trigger event will be satisﬁed immediately. In IMMediate, readings

will be made continuously.

With MANual selected, the trigger event occurs when the front panel TRIG key is pressed. Note

that the instrument must be in local in order for the TRIG key to be active.

With BUS selected, the trigger event occurs when a bus trigger (*TRG or GET) is sent. With EX-

Ternal selected, the trigger event occurs when an input trigger is received via the rear panel EXT

TRIG IN connector.

While in the one-shot mode, with TIMer selected, trigger events occur at a programmed timer in-

terval. Each time the programmed interval elapses, a reading is triggered. Use the :TIMer <n>

command to set the timer interval.

:TIMer <n>

:SYSTem:MACRo:TRIGger:TIMer <n> Set the timer interval

Parameters <n> = 0.001 to 99999.999 Specify timer interval in seconds

DEFault 0.1 seconds

MINimum 0.001 seconds

MAXimum 99999.999 seconds

This command is used to specify the time interval for the timer. The :SOURce TIMer command

is used to select the timer as the control source.

Keithley 6517A User Manual

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