Model 2520 User’s Manual
Triggering
8-9
Remote triggering
Trigger model (remote operation)
The trigger model flowchart in
summarizes remote trigger operation. Operation
is controlled by SCPI commands from the Trigger Subsystem. Key remote commands are
included in the trigger model. Also note that the GPIB defaults are denoted by the “
✛
”
symbol.
The trigger model consists of two layers (Idle Layer and Trigger Layer) to provide versa-
tility. A programmable counter allows operations to be repeated, and various input and
output trigger options are available to provide synchronization between the Model 2520
and other instruments (via the Trigger Link).
Idle and initiate
The instrument is considered to be in the idle state when it is not operating within the trig-
ger layer. While in the idle state, the instrument cannot perform any measurements. An ini-
tiate command is required to take the instrument out of idle. The following commands
perform an initiate operation:
•
:INITiate
•
:READ?
•
:MEASure?
Conversely, if the unit is taking readings, most commands (except DCL, SDC, IFC, and
ABORt) are queued up and will not be executed until the unit returns to idle.
The :MEASure? command will automatically turn the output on. Note that after the instru-
ment returns to the idle state, the output will remain on.
Summary of Contents for 2520
Page 250: ...A Specifications ...
Page 254: ...B StatusandErrorMessages ...
Page 262: ...C DataFlow ...
Page 266: ...D IEEE 488BusOverview ...
Page 281: ...E IEEE 488andSCPI ConformanceInformation ...
Page 285: ...F MeasurementConsiderations ...
Page 308: ...G GPIB488 1Protocol ...
Page 312: ...H ExamplePrograms ...
Page 317: ...I ContinuousPulseMode ...