Specifications

Example for Increasing Measurement Resolution
The FFT Segment Table shown below demonstrates how measurement
resolution can be increased by dividing a Measurement Range into several
parts. In this example, the default Measurement Range (0 to 10E+3 Hz) is
divided into three ranges (1E+3 to 2E+3, 2E+3 to 3E+3, and 0 to 10E+3).
This changes the bandwidth from 95.485 to 9.548 Hz over this range. Since
the new bandwidth is less than 60 Hz, the 60 Hz spurs become visible on
the plot. (The default Measurement Range will not resolve spurs spaced
less than 96 Hz apart in this band.)
10E-3
1
10
100
500
1E+3
2E+3
3E+3
10E+3
Plotted
lange
-
-
-
-
-
-
-
-
(Hz)
1
10
100
500
1E+3
2E+3
3E+3
10E+3
100E+3
Measurement
Range
0
* 0
0
100
500
1E+3
2E+3
0
0
CHz)
1
10
100
500
1E+3
2E+3
3E+3
10E+3
100E+3
Min.
Av'g
1
1
5
30
30
30
30
100
100
BW CHz)
.010
.095
.955
3.819
4.774
9.548
9.548
95.485
954.850
Time Record
Length (Seconds)
400.000
40.000
4.000
1.000
.800
.400
.400
.040
.004
NOTE
The consequence of the changes shown in this example
is an increase in measurement time of approximately 30
seconds.
FFT Segmnts 5-21