Teledyne LeCroy WaveStation 3000 Operators Manual - Manual (Page 22)

WaveStation 3000 Function and Arbitrary Waveform Generator
Generating Modulated Waveforms
Sine, Square, Ramp, Pulse and Arb(itrary) waveforms all may be modulated using WaveStation. You can apply
Amplitude Modulation (AM), Frequency Modulation (FM), Amplitude Shift Keying Modulation (ASK), Frequency
Shift Keying Modulation (FSK), Phase Modulation (PM), Pulse-Width Modulation (PWM), or Double-Side Band
Amplitude Modulation (DSB-AM) depending on the type of carrier wave used.
Noise and DC waveforms cannot be modulated.
Also see:
Adjusting Parameters
Navigating Menus and Making Selections
Understanding the Display
Generating an AM Modulated Waveform
1. Generate a carrier wave of type Sine, Square, Ramp, or Arb(itrary).
2. Before outputting, press the Front Panel Mod function button. You should see "Mod" appear next to the
carrier wave type on the Channel tab, and the modulation parameter menu and value list on the display.
3. Press the Type softkey, then press the AM softkey.
4. Set the following AM parameters:
l
Modulation Source - Internal or External. If External is selected, attach the modulation source to
the Modulation In connector on the Back Panel. You do not need to set any other parameters.
l
AM Freq - modulating waveform frequency. The internal source frequency range is 2 MHz to 20
kHz.
l
AM Depth - also referred to as Amplitude Range or percentage modulation. It's a percentage value
that varies from 1 to 120% . When set to 0%, the output amplitude is approximately half of the user
set amplitude value. When set to 100%, the output amplitude matches the amplitude set. When
using an external source, the AM depth is controlled by the voltage level of the connector attached
to Modulation In on the Back Panel. ±10 V corresponds to 100% of your current depth setting.
5. Press the appropriate channel Output button to begin outputting the waveform.
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