Specifications

Chapter 17 281
GPIB Command Reference
*IDN?
17. GPIB Command Reference
*IDN?
Format *IDN?
Description Returns the E4991A product information. (Query only)
Query response {string 1},{string 2},{string 3},{string 4}<newline><^END>
The following product information is read out:
{string 1} Manufacturer. Always "Agilent Technologies".
{string 2} Model number. Always "E4991A".
{string 3} Serial number
{string 4} Firmware version number (e.g., "01.00")
Front Panel
Equivalents
Unavailable.
*OPC
Format *OPC
Description When all the pending operations have ended, sets OPC bit (Bit 0) of the Standard Event
Status Register. (No query)
Front Panel
Equivalents
Unavailable.
*OPC?
Format *OPC?
Description Returns 1 when all the pending operations end. (Query only)
Query response {1}<newline><^END>
Front Panel
Equivalents
Unavailable.