146 Sequoia Series
5.4 *IDN?
This query requests the source to identify itself. It returns the data in four fields separated by commas.
Query Syntax *IDN?
Returned Parameters
<AARD>
Field Information
California Instruments Manufacturer
xxxxxx Model number and letter
nnnnnn Serial number or 0
Rev. xx.xx Revision level of firmware
5.5 *OPC
This command causes the interface to set the OPC bit (bit 0) of the Standard Event Status register
when the source has completed all pending operations. (See *ESE for the bit configuration of the
Standard Event Status registers.)
Pending operations are complete when all commands sent before *OPC have been executed. This
includes overlapped commands. Most commands are sequential and are completed before the next
command is executed. Overlapped commands are executed in parallel with other commands.
Commands such as measurement and calibration are overlapped with subsequent commands sent to
the power source. The *OPC command provides notification that all overlapped commands have been
completed.
*OPC does not prevent processing of subsequent commands but Bit 0 will not be set until all pending
operations are completed. The *OPC 1 command must be part of the same message with the
command for which the OPC status is requested.
The query causes the interface to place an ASCII "1" in the Output Queue when all pending operations
are completed.
Command Syntax *OPC <NR1>
Parameters 1
Query Syntax *OPC?
Returned Parameters <NR1>
Related Commands *TRIG *WAI
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