R3131 Spectrum Analyzer Operation Manual
2.3.6 Harmonic Distortion Measurements
Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
5. Press FREQ, 8, 0, 0 and MHz.
The center frequency is set to 800 MHz.
6. Press SPAN, 1, 0, 0 and kHz.
A frequency span of 100 kHz is set.
7. Press LEVEL, 3, 0 and MHz (-dBm).
The reference level is set to -30 dBm.
Measuring the fundamental wave
8. Press PK SRCH.
The marker is displayed on the peak. The level displayed in the marker area is
recorded as the fundamental wave level.
ADVANTEST R3131
REF -30.0 dBm ATT 10dB A_wrt B_tank
Norm Norm
Worker Center
irCENTER .800.0000 MHz -
- 800.0000 MHZ -31 42dEtriiStork
Thu 11 Dec 1997Freq
Stop
CF Step
AUTO /MML
Peak•CF
CENTER 800.0000 MHz SPAN 100.0 kHz
RBW 3 kHz VBW 1 kHz SWP 70 ms
Figure 2-75 Measuring the Fundamental Wave
Measuring the harmonics
9. Press MKR -4, 1/2_more and MKR CF Step.
Sets the marker frequency as the step size of the center frequency.
10. Press FREQ.
Allows you to set the center frequency.
11. Press the ( A) step key.
A higher harmonic wave is displayed.
12. Change the reference level so that you can easily observe the trace by pressing
Ref Level as needed.
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