Idle And Initiate - Keithley 6487 Reference Manual

7-4 Triggering

Idle and initiate

While in the idle state, the instrument cannot perform measurements. While in idle, the
reading remains frozen or dashes replace the reading (i.e. -.------ A). Once the Model 6487
is taken out of idle, operation proceeds through the trigger model.
Front panel operation — As shown in
the idle state when it is turned on. Typically, operation remains in the arm and trigger
layers of the trigger model. However, the Model 6487 can be put into the idle state at any
time by selecting HALT in the trigger configuration menu. To take the instrument out of
idle, press the TRIG key. Other front panel keys can be pressed instead, but they may
change the setup.
Remote operation — As shown in
instrument out of idle. The following commands perform an initiate operation:
•
•
•
While operating within the trigger model (not in idle), most commands will not be exe-
cuted until the instrument completes all of its programmed operations and returns to the
idle state. The IFC, SDC, and DCL commands can be executed under any circumstance
while operating within the trigger model. They will abort any other command or query.
The following commands can be executed while operating within the trigger model except
when a READ? or MEASure? is being processed:
•
•
•
•
•
klqb
INITiate
READ?
MEASure?
ABORt
SYSTem:PRESet
*TRG or GET
*RST
*RCL <NRf>
For fastest response, use SDC or DCL to return to idle (see
on general bus commands).
Figure 7-1, the Model 6487 immediately leaves
Figure 7-2, an initiate command is required to take the
Model 6487 Reference Manual
Section 9 for details