Common analysis and display functions
R&S
®
FSVA3000/ R&S
®
FSV3000
581
User Manual 1178.8520.02 ─ 08
X-value of the sweep point
As described in
"Mapping samples to sweep points with the trace detector"
on page 577, the number of samples taken during a sweep can be much larger than
the number of sweep points that are displayed in the measurement trace.
To determine the x-value of the sweep point, two different methods are available:
●
Start/stop
●
Bin-centered
Start/stop
This is the default (legacy) method for trace values in the frequency domain. The x-
value of the first sweep point corresponds to the starting point of the full measurement
span. The x-value of the last sweep point corresponds to the end point of the full mea-
surement span. All other sweep points are divided evenly between the first and last
points. The distance between two sweep points is span/(<no_sweep_points> -1).
Bin-centered
This is the default method for all marker values. The full measurement span is divided
by the number of sweep points. The result is the span that is evaluated for an individ-
ual sweep point, also referred to as a
bin
. The x-value of the sweep point is then
defined as the x-value at the center of the bin (bin/2).
video
signal
s1 s2 s3 s4 s5 s6 s8 s1
video
signal
s1 s2 s3 s4 s5 s6 s8 s1
Measurement point n
Video
Signal
Meas. point n+1
Span/<no. of meas points>
x
n
x
n+1
Span/<no. of meas points>
x
Using the bin-centered method, the first and last x-values of the trace are not identical
to the exact starting and end point of the measurement span. The distance between
two sweep points is span/(<no_sweep_points>) or span/bin_size.
Marker values are always determined using the bin-centered method. Markers placed
on the first and last x-values of the measured span indicate the same results as the
first and last trace point.
Trace configuration
