Specifications

106 Chapter 12
Using Segmented Sweep (ESA-E Series Spectrum Analyzers)
Using Segmented Sweep With Limit Lines
Using Segmented Sweep (ESA-E
Series Spectrum Analyzers)
Using Segmented Sweep With Limit Lines
Segmented sweep can also use other standard spectrum analyzer
functionality, such as limit lines. In this procedure three segments are
used. In the first segment, the limit lines are used to verify that the
signal phase noise is acceptable. The second and third segments are
used to verify the harmonic signals are below a specified amplitude.
Step 1. Connect the 10 MHz REF OUT from the rear panel to the front-panel
INPUT. Preset the instrument:
Press
Preset, Factory Preset (if present).
Step 2. Place the peak of the fundamental signal at the top of the graticule:
Press
AMPLITUDE Y Scale, Ref Level, 8, dBm.
Step 3. Open the segmented sweep editor:
Press
Sweep, Segmented, Modify, Edit.
Step 4. Display the fundamental signal in the first segment:
Press
Segment, 1, Enter.
Press
Center Freq, 10, MHz.
Press
Span, 500, kHz.
Press
Res BW, 3, kHz.
Press
Video BW, 30, Hz.
Press
Points, 1000, Enter.
Step 5. Display the second harmonic in the second segment:
Press
Segment, 2, Enter.
Press
Center Freq, 20, MHz.
Press
Span, 100, kHz.
Step 6. Display the third harmonic in the third segment:
Press
Segment, 3, Enter.
Press
Center Freq, 30, MHz.
Press
Span, 100, kHz.
Step 7. Open the limit line editor:
Press
Display, Limits, Limit 1, Type (Upper), Edit.
Step 8. Enter the limit line data from Table 12-1 below. To enter the table data:
Press
Point, 1, Enter, Frequency, 9.75, MHz, Amplitude, −80, dBm,
Connected (Yes).
Step 9. Begin the next limit line point:
Press
Tab ⇒|.