User`s manual

Chapter 4 99
IEEE Common Commands
Common Command Descriptions
*CLS (Clear Status)
The *CLS command clears the contents (sets all bits to zero) of all
Event Registers summarized in the Status Byte. The *CLS command
also empties all queues (removes all current messages) which are
summarized in the Status Byte, except the Output Queue. The Status
Byte Register is cleared and any pending service request is cleared. The
following Event Registers are affected:
• Hardware 1 Status Register
• Hardware 2 Status Register
• Questionable Data/Signal Register
• Standard Event Status Register
• Operational Status Register
• Calibration Status Register
• Communicate Status Register
• Call Processing Status Register
The Following message queues are affected:
• Error Message Queue
NOTE The *CLS command does not clear the contents of the Message Screen
which is displayed on the CRT when the SHIFT RX keys are selected.
This display is only cleared when the unit is powered on.
*ESE (Standard Event Status Enable)
The Test Set responds to the *ESE command. See “Status Reporting” on
page 121 for a detailed explanation of the *ESE command.
*ESE? (Standard Event Status Enable Query)
The Test Set responds to the *ESE? command. See “Status Reporting”
on page 121 for a detailed explanation of the *ESE? command.
*ESR? (Standard Event Status Register Query)
The Test Set responds to the *ESR? command. See “Status Reporting”
on page 121 for a detailed explanation of the *ESR? command.
*SRE (Service Request Enable)
The Test Set responds to the *SRE command. See “HP-IB Service
Requests” on page 167 for a detailed explanation of the *SRE
command.