Specifications

Chapter 6 45
Making Distortion Measurements
Measuring Harmonics and Harmonic Distortion with a One-Button
Measurement
Making Distortion Measurements
Measuring Harmonics and Harmonic
Distortion with a One-Button Measurement
This procedure measures the harmonics of the 10 MHz reference output
signal. The harmonics and total harmonic distortion are measured
using the one-button automated harmonic measurement.
Step 1. Preset the analyzer:
Press
Preset, Factory Preset (if present).
Step 2. Connect the ESA 10 MHz reference output from the rear of the
analyzer to the INPUT. For PSA turn the internal 10 MHz reference
signal on:
(PSA) Press
System, Reference, 10MHz Out (On).
Step 3. Set the analyzer reference level, center frequency and RBW:
Press
AMPLITUDE Y Scale, Ref Level, 10, dBm.
Press
FREQUENCY Channel, Center Freq, 10, MHz.
Press
BW/Avg, Res BW, 300, kHz.
Step 4. Run the Power Suite harmonic distortion measurement:
Press
Measure, More, Harmonic Distortion.
Step 5. Set the number of harmonic distortion measurement averages to 3:
Press
Meas Setup, Avg Number (On), 3, Enter
Step 6.
Set the average mode to exponential to continuously update the result
after each subsequent sweep:
Press
Meas Setup, Avg Mode (Exp).
Repeat average mode clears the averaged result after the specified
number of averages is complete.
Step 7. Optimize the analyzer’s dynamic range settings:
Press
Meas Setup, Optimize Ref Level.
Step 8. Display the total harmonic distortion:
(ESA) Press
View/Trace, Harmonics & THD.
(ESA) Press
Trace/View, Harmonics & THD.