Liquid Instruments Moku:Go Manuale utente

V21-0407

Arbitrary Waveform Generator

Moku:Go User Manual

Moku:Go’s Arbitrary Waveform Generator can generate custom waveforms with up to 65,536

points at update rates of up to 125 MSa/s. Waveforms can be loaded from a file, or input as a piece-

wise mathematical function with up to 32 segments, enabling you to generate truly arbitrary

waveforms. In pulsed mode, waveforms can be output with more than 250,000 cycles of dead

time between pulses, allowing you to excite your system with an arbitrary waveform at regular

intervals over extended periods of time.

Table of Contents

User Interface....................................................................................................................................... 3

Secondary click 5

Main Menu ............................................................................................................................................ 6

Output Configuration .......................................................................................................................... 7

Enable / Disable Outputs 7

Load Impedance 7

Selecting the correct load impedance 7

Modulation Modes 8

Off 8

Pulsed 8

Burst 9

Waveform Types ................................................................................................................................ 10

Custom 11

Uploading custom waveforms 11

Maximum recommended sampling rate 11

Amplitude scaling and interpolation 11

Equation 12

Waveform segments 12

Equation editor 13

Power Supply ..................................................................................................................................... 14

Ensure Moku:Go is fully updated. For the latest information:

www.liquidinstruments.com

User Interface

Description

1 Main menu 8 Enable/disable output

Configure amplitude / high level

Configure waveform shape

Configure number of points

Enable/disable modulation

4 Configure sample rate 11 Active parameter*

Configure frequency / period / update rate

Switch between representations*

Turn linear interpolation on or off

Configure phase

7 Configure offset

*Click the amplitude, offset, frequency, or phase number to make it the active parameter. For

amplitude and offset, click the swap button to switch between Vpp/offset or high/low level

representations. For frequency, click the swap button to switch between frequency or period

representations.

Secondary click

Sync phase with copy settings between channels can be accessed by right click (secondary click)

menu on the main user interface. The settings on one output can be instantly applied to the other

output with copy settings. And the phase between two channels can be aligned with sync phase. In

additional, you can edit the equation or load your custom waveform via this menu. Detailed

information about the equation editor and custom waveform can be found in a later section.

Main Menu

The main menu can be accessed by pressing the icon on the top-left corner.

This menu provides the following options:

Options

Shortcuts

Description

Save/recall settings:

•Save instrument state Ctrl+S Save the current instrument settings.

•Load instrument state

Ctrl+O

Load last saved instrument settings.

•

Show current sate

Show the current instrument settings.

Reset instrument Ctrl+R Reset the instrument to its default state.

Power supply

Access power supply control window.*

File manager

Open file manager tool.

File converter Open file converter tool.

Help

•

Liquid Instruments website

Access Liquid Instruments website.

•Shortcuts list Ctrl+H Show Moku:Go app shortcuts list.

•

Manual

Access instrument manual.

•

Report an issue

Report bug to Liquid Instruments.

•About

Show app version, check update, or license

information.

* Power supply is available on Moku:Go M1 and M2 models. Detailed information about power supply can be found in Moku:Go power

supply manual.

Output Configuration

Enable / Disable Outputs

Enable the output of the selected channel by pressing the icon

Disable the output of the selected channel by pressing the icon

Load Impedance

Moku:Go assumes the external load to have a high load impedance.

Selecting the correct load impedance

Moku:Go’s outputs have an impedance of 200 Ω. As such, voltages supplied to a 50 Ω load will be

reduced and not recommended.

Modulation Modes

Moku:Go’s Arbitrary Waveform Generator supports three modulation modes: Off, Pulsed, and

Bursted.

Off

In normal mode, the output waveform is repeated continuously with no dead time between cycles.

Pulsed

In pulsed mode, the output waveform can be configured to have up to 218 = 262144 cycles of dead

time between each repetition of the arbitrary waveform.

Parameter

Description

Dead cycles

The period of each cycle of dead time is equal to the selected period

of the waveform.

2 Dead voltage The dead time voltage can be configured to equal any DC value

between the waveform’s minimum and maximum voltages.

Burst

In burst mode, the output waveform can be triggered from another signal source. The output once

triggered varies according to the trigger mode.

Parameter

Description

Burst cycle count

N - Cycle mode only. The number of cycles to generate

before re-arming.

2 Burst mode N -Cycle or Start. The Start mode generates infinite loops of the

waveform after the trigger event.

3 Trigger level Set the voltage level to trigger at.

Input range

Set the input channel range.

Trigger source

Select between input 1 or 2.

Waveform Types

Generate one of five pre-set waveforms, a custom waveform from a file, or a waveform defined by

a series of piece-wise mathematical equations.

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