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3 - 18 USING THE COMBISCOPE INSTRUMENTS
3.4 Acquisition
3.4.1 Acquisition 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.
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
INIT
or
INIT:CONT ON
*RST
ABORt
power on
No
Yes
IDLE state
INITiated state
INIT:CONT ON
No
Yes
Wait for complete
Wait for TRIGger state
Wait for trigger
Acquisition
Acquisition completed
Start acquisition
TRIGger
:LEVel
:SLOPe
TRIGger
:SOURce
BUS
IMMediate
INTernal
LINE
ST7186
Figure 3.3 The Trigger Model for acquisitions