Fluke PM-3370B, PM-3380B, PM-3390B, PM-3394B, PM-3384B user manual Acquisition control

3 - 18 USING THE COMBISCOPE INSTRUMENTS

3.4 Acquisition

3.4.1Acquisition control

Several commands exist to control the acquisition process. The following diagram shows the possible states of the acquisition process, and the way they are affected by commands.

IDLE state

*RST ABORt power on

INIT

orNo

INIT:CONT ON

Yes

INITiated state

	No
Yes	INIT:CONT ON

BUS				Wait for TRIGger state
IMMediate	TRIGger	TRIGger
			Wait for trigger	Wait for complete
		:LEVel
INTernal	:SOURce
		:SLOPe
LINE
		Start acquisition		Acquisition completed

Acquisition

ST7186

Figure 3.3 The Trigger Model for acquisitions

The trigger model shows that after a *RST command, the instrument is in the IDLE state. An acquisition doesn’t start until an INITiate command is received. Initiation of the oscilloscope occurs by sending the INITiate[:IMMediate] command