22 | Moku:Pro Waveform Generator User Manual © 2023 Liquid Instruments. All rights reserved.
Modulation types and trigger modes
Modulation sources
Each modulation type can be driven by one of three sources.
Internal
Modulation is driven by an internally generated sine wave of configurable frequency. The
amplitude of this wave is “full range.” It will modulate to the depth specified when configuring the
modulation type.
Input
Modulation for a given channel is driven by an analog input. The depth is specified per volt on the
input. When this source is selected, the range and coupling of the corresponding input can also be
selected.
Output
Modulation for a given channel is driven by another output channel (i.e. Output 1 may be modulated
by the waveform on Output 3). This allows the user to multiply-modulate a signal by modulating a
signal on one channel, then using that signal to modulate the another in turn. This is useful, for
example, when you wish to generate an “ideal” modulated signal on one channel, but then perturb
the phase, frequency, or amplitude in order to test a system’s response.
Trigger sources
Burst and Sweep modes depend on the detection of a trigger event. There are three possible
sources for this event.
Internal
The trigger event is generated automatically at a given rate (specified period).
External
A rising edge on the back-panel External Trigger Input is used as the trigger source. For trigger
level and precision characteristics, refer to the Moku:Pro Technical Specifications available at
liquidinstruments.com
.
Input
The specified analog input is monitored for a rising edge past the specified voltage.
Output
Another analog output channel is monitored for a rising edge past the specified voltage. Combined
with the fact that the other outputs can in turn be modulated from a variety of sources, this provides
extremely flexible control of the trigger period (included for example changing period based on an
external voltage).
Amplitude modulation
Applicable to: Sine, Square, Ramp, Pulse, Noise
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