Common (*) Commands 6
Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 231
Introduction to
Common (*)
Commands
The common commands are defined by the IEEE 488.2 standard. They are
implemented by all instruments that comply with the IEEE 488.2 standard. They
provide some of the basic instrument functions, such as instrument identification
and reset, reading the instrument setup, and determining how status is read and
cleared.
Common commands can be received and processed by the instrument whether
they are sent over the interface as separate program messages or within other
program messages. If an instrument subsystem has been selected and a common
command is received by the instrument, the instrument remains in the selected
subsystem. For example, if the program message ":ACQuire:TYPE AVERage; *CLS;
COUNt 256" is received by the instrument, the instrument sets the acquire type,
then clears the status information and sets the average count.
In contrast, if a root level command or some other subsystem command is within
the program message, you must re-enter the original subsystem after the
command. For example, the program message ":ACQuire:TYPE AVERage;
:AUToscale; :ACQuire:COUNt 256" sets the acquire type, completes the autoscale,
then sets the acquire count. In this example, :ACQuire must be sent again after the
:AUToscale command in order to re-enter the ACQuire subsystem and set the
count.
n/a *STB? (see page 250) <value> ::= 0 to 255; an integer
in NR1 format, as shown in the
following:
Bit Weight Name "1" Indicates
--- ------ ---- ---------------
7 128 OPER Operation status
condition occurred.
6 64 RQS/ Instrument is
MSS requesting service.
5 32 ESB Enabled event status
condition occurred.
4 16 MAV Message available.
3 8 ---- (Not used.)
2 4 MSG Message displayed.
1 2 USR User event
condition occurred.
0 1 TRG A trigger occurred.
*TRG (see page 252) n/a n/a
n/a *TST? (see page 253) <result> ::= 0 or non-zero value;
an integer in NR1 format
*WAI (see page 254) n/a n/a
Table 78 Common (*) Commands Summary (continued)
Command Query Options and Query Returns
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