Keysight 81150A - Page 230

Appendix
230
Front-Panel
Operation
After enabling , press the Start Frequency or Stop Frequency softkey
again to toggle to the Center Freq or Freq Span softkey. Then use the knob
or numeric keypad to enter the desired values.
Remote Interface
Operation
:FREQuency[1|2]:CENTer{<frequency>|MINimum|
MAXimum}
:FREQuency[1|2]:SPAN {<frequency>|MINimum|MAXimum}