IEEE-488 Reference
3-38
3.12 Signal oriented measurement commands
The signal oriented command group is used to acquire readings using a set of high-level instructions to control the measurement
process. These commands are summarized in Table 3-3.
:FETCh?
Description
This query command is used to request the latest post-processed reading. After sending this
command and addressing the Model 6517A to talk, the reading will be sent to the computer. This
command does not affect the instrument setup.
This command does not trigger a measurement. It simply requests the last available reading.
Note that this command can repeatedly return the same reading. In the absence of a new reading,
this command will simply return the old reading. If your application requires “fresh” readings,
use the :DATA:FRESh? command (see SENSe Subsystem).
This command is automatically asserted when the :READ? or :MEASure? command is sent.
:CONFigure:<function>
where: <function> = VOLTage[:DC]
Volts function
CURRent[:DC]
Amps function
RESistance
Ohms function
CHARge
Coulombs function
Query
:CONFigure?
Query the selected function
Description
This command is used to configure the instrument for subsequent measurements on the specified
function. Basically, this command places the instrument in a “one-shot” measurement mode.
The :READ? command can then be used to trigger a measurement and acquire a reading (see
:READ?).
When this command is sent, the Model 6517A will be configured as follows:
• The function specified by this command is selected.
• All controls related to the selected function are defaulted to the *RST values.
• Continuous initiation is disabled (:INITiate:CONTinuous OFF).
• The control sources in all three layers of the Trigger Model are set to Immediate.
• The count values in all three layers of the Trigger Model are set to one (1).
• The delay in all three layers of the Trigger Model are set to zero (0).
Table 3-3
Signal oriented measurement command summary
Command
Description
:FETCh?
:CONFigure:<function>
:READ?
:MEASure[:<function>]?
Requests the latest reading.
Places the 6517A in a “one-shot” measurement mode for the specified function.
Performs an :ABORt, :INITiate, and a :FETCh?.
Performs an :ABORt, :CONFigure:<function>, and a :READ?.
