Specifications

282 Chapter 17
GPIB Command Reference
*OPT?
*OPT?
Format *OPT?
Description Returns the identification code(s) of the option(s) installed on the E4991A. If no option is
installed, this command returns 0. If two or more options are installed, it returns a string of
the option identification codes separated by commas (,). (Query only)
The E4991A offers the following option identification codes:
0 No Option
001 dc bias function
1D5 High Stability Frequency Reference
002 Material Measurement Software
Query response {string}<newline><^END>
Front Panel
Equivalents
Unavailable.
*RST
Format *RST
Description Resets the E4991A to its initial settings. Initialization by the SYST:PRES command and
trigger setting by the INIT:CONT OFF command take place. (No query)
Related commands INIT:CONT command on page 382
SYST:PRES command on page 523
Front Panel
Equivalents
Unavailable.