Agilent Technologies Signal Analyzer N9030a - Manual (Page 1152)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Sweep/Control
Sweep/Control
Accesses a menu that enables you to configure the Sweep and Control functions of the analyzer,
such as Sweep Time and Gating.
Key Path Front-panel key
Initial S/W Revision Prior to A.02.00
Sweep Time
Controls the time the analyzer takes to sweep the current frequency span when the Sweep Type is
Swept, and displays the equivalent Sweep Time when the Sweep Type is FFT.
When Sweep Time is in Auto, the analyzer computes a sweep time which will give accurate
measurements based on other settings of the analyzer, such as RBW and VBW.
Significantly faster sweep times are available for the Swept SA measurement with Option FS1.
The Meas Uncal (measurement uncalibrated) warning is given in the Status Bar in the lower right corner
of the screen when the manual sweep time entered is faster than the sweep time computed by the
analyzer’s sweep time equations, that is, the Auto Sweep Time. The analyzer’s computed sweep time
will give accurate measurements; if you sweep faster than this your measurements may be inaccurate. A
Meas Uncal condition may be corrected by returning the Sweep Time to Auto; by entering a longer
Sweep Time; or by choosing a wider RBW and/or VBW
On occasion other factors such as the Tracking Generator’s maximum sweep rate, the YTF sweep rate (in
high band) or the LO’s capability (in low band) can cause a Meas Uncal condition. The most reliable way
to correct it is to return the Sweep Time to Auto.
If the analyzer calculates that the Auto Sweep Time would be greater than 4000s (which is beyond its
range), the warning message “Settings Alert;Sweep Rate Unavailable” is displayed. In this case increase
the RBW or reduce the span.
If the anzlyzer’s estimated sweep time in an FFT sweep is greater than 4000s, the warning message
“Settings Alert;Span:RBW Ratio too big” is displayed. In this case reduce the span or increase the RBW
and/or FFT Width.
When Sweep Type is FFT, you cannot control the sweep time, it is simply reported by the analyzer
to give you an idea of how long the measurement is taking.
Note that although some overhead time is required by the analyzer to complete a sweep cycle, the
sweep time reported when Sweep Type is Swept does not include the overhead time, just the time
to sweep the LO over the current Span. When Sweep Type is FFT, however, the reported Sweep
1152 Remote Language Compatibility Measurement Application Reference