User manual

RIGOL Chapter 13 Signal Source
13-20 MSO2000A/DS2000A User’s Guide
1. Select the Carrier Waveform
Press Setup1 to enter the waveform setting interface. Press Wave to select the
desired carrier.
Note: When “Pulse”, “DC” or “Noise” is selected, the modulation menu will be
hidden automatically.
2. Set the Carrier Parameters
After selecting the desired carrier, you can refer to the introduction in
“Parameter Setting Method” to set the carrier parameters (frequency,
amplitude, etc).
3. Select the Modulating Waveform
Press Modulation to open the source 1 modulation setting menu. Press Shape
to select the desired modulating waveform, including sine, square, ramp
waveform or noise.
4. Set the Modulation Frequency
Press Freq to set the frequency of the modulating waveform. The range is from
1 Hz to 50 kHz. For the setting method, please refer to the introduction in
“
Parameter Setting Method”.
5. Set the Modulation Depth
The modulation depth refers to the strength of the AM and is expressed in
percentage. Press Depth to set the modulation depth of the modulating
waveform. The range is from 0% to 120%. When it is set to 0%, the output
amplitude is half of the carrier amplitude. When it is set to 100%, the output
amplitude equals the carrier amplitude. When it is set to a value greater than
100%, envelop distortion will occur which must be avoided in actual circuit; at
this point, the output of the instrument will not exceed 5 Vpp (the load is 50 Ω).