Rohde & Schwarz FSW43 - Frequency Axis Scaling; Full Span; Start; Stop; Zero Span

Common Measurement Settings
R&S
®
FSW
389User Manual 1173.9411.02 ─ 19
span = 0: 0 Hz
span >0:
span
min
≤ f
span
≤ f
max
f
max
and span
min
are specified in the data sheet.
For more information see chapter 6.3.1.1, "Defining the Scope of the Measurement -
Frequency Range", on page 385.
Remote command:
[SENSe:]FREQuency:SPAN on page 833
Start / Stop
Defines the start and stop frequencies. The following range of values is allowed:
f
min
≤ f
start
≤ f
max
– span
min
f
min
+ span
min
≤ f
stop
≤ f
max
f
min
, f
max
and span
min
are specified in the data sheet.
Remote command:
[SENSe:]FREQuency:STARt on page 834
[SENSe:]FREQuency:STOP on page 834
Frequency Axis Scaling
Switches between linear and logarithmic scaling for the frequency axis.
By default, the frequency axis has linear scaling. Logarithmic scaling of the frequency
axis, however, is common for EMI measurements over large frequency ranges as it
enhances the resolution of the lower frequencies. On the other hand, high frequencies
get more crowded and become harder to distinguish.
For more information see chapter 6.3.1.4, "Coping with Large Frequency Ranges -
Logarithmic Scaling", on page 386.
Remote command:
DISPlay[:WINDow<n>]:TRACe:X:SPACing on page 831
Full Span
Sets the span to the full frequency range of the R&S FSW specified in the data sheet.
This setting is useful for overview measurements.
Remote command:
[SENSe:]FREQuency:SPAN:FULL on page 834
Zero Span
Sets the span to 0 Hz (zero span). The x-axis becomes the time axis with the grid lines
corresponding to 1/10 of the current sweep time ("SWT").
For details see chapter 5.2, "Basic Measurements", on page 115.
Remote command:
FREQ:SPAN 0Hz, see [SENSe:]FREQuency:SPAN:FULL on page 834
Frequency and Span Configuration