Agilent Technologies Signal Analyzer N9030a - Manual (Page 1142)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
SPAN X Scale
SPAN X Scale
Activates the Span function and displays a menu of span functions.
Key Path Front-panel key
Initial S/W Revision Prior to A.02.00
Span
Changes the displayed frequency range symmetrically about the center frequency. While adjusting
the Span the Center Frequency is held constant, which means that both Start Frequency and Stop
Frequency will change.
Span also sets the frequency entry mode to Center/Span. In Center/Span mode, the center
frequency and span values are displayed below the graticule, and the default active function in
the Frequency menu is Center Freq.
While discussing the Span function we make the distinction between “swept spans” and “zero
span”. We use the term “swept spans” to mean spans other than zero; recognizing that, because of
this terminology, the user can be in what we call a “swept span” even while performing an FFT
“sweep”.
While in swept spans, setting the span to 0 Hz through SCPI or the front panel numeric key pad
puts the analyzer into zero span. However, using the Step keys and the RPG in swept spans, the
Span can only go as far down as 10 Hz and cannot be set to zero.
While in zero span, setting the Span to a non-zero value through SCPI or Front Panel puts the
analyzer in swept spans.
If the Span is set to a value greater than the maximum allowable span of the instrument, an error
message is generated indicating the data is out of range and was clipped to upper limit.
See SpanPresets
Key Path SPAN X Scale
Remote Command [:SENSe]:FREQuency:SPAN
[:SENSe]:FREQuency:SPAN?
Example FREQ:SPAN 2GHz sets the span to 2GHz
FREQ:SPAN 0 Hz Sets the span to 0 Hz and puts the instrument in Zero Span
Dependencies
If the electrical attenuator is enabled, any attempt to set Span such that the Stop Frequency
would be >3.6 GHz results in an error.
1142 Remote Language Compatibility Measurement Application Reference