Ieee 488.2 Common Commands - Agilent Technologies 8719ET Programmer's Manual

GPIB Programming
GPIB Operation

IEEE 488.2 Common Commands

IEEE 488.2 defines a set of common commands. All instruments are required to implement
a subset of these commands, specifically those commands related to status reporting,
synchronization and internal operations. The rest of the common commands are optional.
The following list details which of these IEEE 488.2 common commands are implemented
in the analyzer and the response of the analyzer when the command is received.
Clears the instrument Status Byte by emptying the error queue and
*CLS
clearing all event registers, also cancels any preceding *OPC command or
query (does not change the enable registers or transition filters).
Sets bits in the Standard Event Status Enable Register — current setting
*ESE <num>
is saved in non-volatile memory.
Reads the current state of the Standard Event Status Enable Register.
*ESE?
Reads and clears the current state of the Standard Event Status Register.
*ESR?
Returns a string that uniquely identifies the analyzer. The string is of the
*IDN?
form:
HEWLETT PACKARD,87NNE,0,X.XX
where 87NNE is the model number of the instrument and X.XX is the
firmware revision of the instrument.
This returns a string of device specific characters that, when sent back to
*LRN?
the analyzer will restore the instrument state active when *LRN? was sent.
Data formatting (ENTER USING "-K" in HP BASIC) or a similar technique
should be used to ensure that the transfer does not terminate on a carriage
return or line feed (both <
part of the data).
Operation complete command. The analyzer will generate the OPC
*OPC
message in the Standard Event Status Register when all pending
overlapped operations have been completed (e.g. a sweep, or a preset).
Operation complete query. The analyzer will return an ASCII "1" when all
*OPC?
pending overlapped operations have been completed.
Sets the pass-control-back address (the address of the controller before a
*PCB <num>
pass control is executed).
Executes a device reset and cancels any pending *OPC command or query.
*RST
Sets bits in the Service Request Enable Register. Current setting is saved
*SRE <num>
in non-volatile memory.
Reads the current state of the Service Request Enable Register.
*SRE?
Reads the value of the instrument Status Byte. This is a non-destructive
*STB?
read—the Status Byte is cleared by the *CLS command.
3-16
C L
> and < > are present in the learn string as
R F
Chapter 3