Specifications

104 Chapter 12
Using Segmented Sweep (ESA-E Series Spectrum Analyzers)
Measuring Harmonics Using Segmented Sweep
Using Segmented Sweep (ESA-E
Series Spectrum Analyzers)
Measuring Harmonics Using Segmented
Sweep
Segmented sweep allows you to define many bands of interest and
display them as a single trace. Although the following examples only
involve a maximum of 3 segments, you can set up the trace to display 32
segments simultaneously.
This procedure uses segmented sweep to measure the 50 MHz
fundamental signal, the second harmonic and the third harmonic.
Compare the measurement time differences between the previous
procedure, “Measuring Harmonics Using Standard Sweep” on page 102
and this procedure using segmented sweep. Segmented sweep is faster
than sweeping the full span to capture the fundamental signal to the
third harmonic.
Step 1. Preset the instrument:
Press
Preset, Factory Preset (if present).
Step 2. Turn on the internal 50 MHz amplitude reference signal as in step 2
from the “Measuring Harmonics Using Standard Sweep” on page 102,
section above.
Step 3. Set the reference level and attenuation:
Press
AMPLITUDE Y Scale, Ref Level, −20, dBm.
Press
AMPLITUDE Y Scale, Attenuation, 5, dB.
Step 4. Open the segmented sweep editor:
Press
Sweep, Segmented, Modify, Edit.
Three segments are going to be set up, as in Figure 12-2 below, to view
the fundamental signal, second harmonic and third harmonic.
Step 5. Set the first segment parameters:
Press
Segment, 1, Enter.
Press
Center Freq, 50, MHz.
Press
Span, 100, kHz.
Press
Video BW, 30, Hz.
Step 6. Set the second segment parameters:
Press
Segment, 2, Enter.
Press
Center Freq, 100, MHz.
Press
Span, 100, kHz.
Press
Video BW, 30, Hz.
Step 7. Set the third segment parameters:
Press
Segment, 3, Enter.