Agilent Technologies Signal Analyzer N9030a - Manual (Page 294)

5 Legacy Command Descriptions
FB (Stop Frequency)
FB?
Query Data Type <real> in HZ.
SCPI Equivalent Commands [:SENSE]:FREQuency:STOP <real> (HZ|KHZ|MHZ|GHZ) (see "Stop Freq" on page 581 )
Preset Instrument maximum frequency.
Notes The OA parameter only returns the current value to the controller. It does not set the
active function to the stop frequency.
294 Remote Language Compatibility Measurement Application Reference