Get (Group Execute Trigger); Spe, Spd (Serial Polling) - Keithley 2000 User Manual

GET (group execute trigger)

GET is a GPIB trigger that is used as an arm, scan and/or measure event to control operation.
The Model 2000 multimeter reacts to this trigger if it is the programmed control source. The
control source is programmed from the SCPI: TRIGger subsystem.
With the instrument programmed and waiting for a GPIB trigger, the following program frag-
ment will provide the GET:
Program fragment
PRINT #1, "trigger 16"
This sends IEEE-488 commands UNT UNL LISTEN 16 GET. When the command is execut-
ed, the trigger event occurs. (The command TRIGGER just sends GET. Any other listeners are
triggered when the command is executed.)

SPE, SPD (serial polling)

Use the serial polling sequence to obtain the Model 2000 serial poll byte. The serial poll byte
contains important information about internal functions, (see "status structure"). Generally, the
serial polling sequence is used by the controller to determine which of several instruments has
requested service with the SRQ line. However, the serial polling sequence may be performed at
any time to obtain the status byte from the Model 2000 multimeter.
Program fragment
PRINT #1, "spoll 16"
INPUT #2, S
PRINT S
Remote Operation
'Trigger 2000 from over the bus
'Serial poll the 2000
'Read serial poll byte
'Display the decimal value of the
serial poll byte
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