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 register 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 current command has finished executing. The *WAI command ensures that overlapped 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.