Rigol DSG821 Performance Verification Guide

Chapter 2 Performance Verification Test RIGOL
DSG800 Performance Verification Guide
2-13
f) Set the modulation depth to 30%.
g) Set the modulation frequency to 1 kHz.
h) Set the modulation waveform to Sine.
i) Turn on the modulation output switch Mod/on.
3. Configure the signal analyzer:
a) Set the center frequency to 1 GHz.
b) Set the span to 10 kHz.
c) Set the reference level to 0 dBm.
d) Set the input attenuation to 10 dB.
e) Set the resolution bandwidth to 100 Hz.
f) Set the video bandwidth to 100 Hz.
g) Set the sweep time method to accurate.
h) Select AM analog demodulation.
4. Press Meas Setup  Auto Scale on the signal analyzer and then read the results of the
demodulated signal in the AM analog demodulation test interface of the signal analyzer.
Record the measurement results of (Pk - Pk) / 2 and Distortion.
Note: (Pk - Pk) / 2 represents the peak of the low frequency signal after AM demodulation.
5. Calculate the Modulation Accuracy = |(Pk - Pk) / 2 - 30%|, Distortion = Distortion
Value. Then, compare the calculation results with the specifications.
Test Record Form
DSG800 Output
Frequency
Item
Measurement
Value
Calculation
Result
Limit
Pass/
Fail
1 GHz
Modulation
Accuracy
[1]
< Modulation Depth Setting
× 4% + 1%
Distortion
[2]
< 3% (typ.)
Note:
[1] Modulation Accuracy = |(Pk - Pk) / 2 - 30%|
[2] Distortion = Distortion Value in the AM Analog Demodulation Test Interface

Rigol DSG821 Specifications

General

Brand	Rigol
Model	DSG821
Category	Portable Generator
Language	English