R&S FSW Series, Руководство пользователя

Страница: 445 / 1450

Common Measurement Settings
R&S
®
FSW
445 User Manual 1173.9411.02 ─ 43
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 1028
[SENSe:]FREQuency:STOP
on page 1028
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 measurements over large frequency ranges as it enhan-
ces 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 8.3.1.3, "Coping with Large Frequency Ranges -
Logarithmic Scaling" , on page 442.
Remote command:
DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>:X:SPACing
on page 1025
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 1028
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 7.1, "Basic Measurements" , on page 132.
Remote command:
FREQ:SPAN 0Hz
, see
[SENSe:]FREQuency:SPAN
on page 1027
Last Span
Sets the span to the previous value. With this function you can switch between an
overview measurement and a detailed measurement quickly.
Remote command:
[SENSe:]FREQuency:SPAN
on page 1027
Center Frequency Stepsize
Defines the step size by which the center frequency is increased or decreased when
the arrow keys are pressed. When you use the rotary knob the center frequency
changes in much smaller steps (1/10 the size as for the arrow keys).
Frequency and Span Configuration