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Remote Operation
Common Commands
*STB?
Returns the current value of the instrument’s Status Byte. This will not change
the Status Byte register. The response value is an integer, to be interpreted as
a binary number, representing the bit values of the register. Performing a
serial poll on the instrument also reads the Status Byte register, except that
bit 6 indicates whether there is a service request that has not been serviced.
The most convenient way to clear the Status Byte register is to send a *CLS
command. The Status Byte register summarizes the states of the other regis-
ter sets. It is also responsible for generating service requests.
*TST?
Tests the analyzer interface hardware and returns 0 if the interface is func-
tional.
*WAI
Prevents the instrument from executing any further commands until the cur-
rent command has finished executing. The *WAI command ensures that over-
lapped commands are completely processed before subsequent commands,
those sent after the *WAI command, are processed.
This command is not
needed by the optical spectrum analyzer, since all commands are non-
overlapped, but it is included for compatibility with existing programs
that might use it.
book.book Page 44 Monday, January 31, 2000 10:34 AM