Hantek DSO2000 Series Digital Storage Oscilloscope User Manual

Introduction

This document is the user manual for the Hantek DSO2000 Series Digital Storage Oscilloscope, Version 1.4.

1. Preparation for Use

1.1. Adjusting Support Legs

Adjust the support legs properly to use them as stands for tilting the oscilloscope upwards, ensuring stable placement and optimal viewing conditions.

1.2. Connecting the Power Cord

Connect the power cord correctly. This oscilloscope can operate from an AC power source of 100-240 V, 45-440 Hz. Use the provided power cord to connect the oscilloscope to the power source as shown in the diagram. To turn on the instrument, press the power switch located in the lower-left corner of the front panel. If the instrument does not turn on, check if the power cord is securely connected and if the power source is live.

Power Switch: [Power Button Symbol]

To turn off the instrument, please press the power switch.

1.3. Brief Description of the Front Panel

The following content describes and familiarizes you with the front and rear panels of this series of digital oscilloscopes, allowing for a quick understanding of their features.

Front Panel Diagram Description: An image of the Hantek DSO2D15 Digital Storage Oscilloscope front panel, showing various buttons, knobs, connectors, and a display screen. The numbered components are:

Power Button
Legs
USB Interface
Menu Select Key
Vertical Control System
CH1~CH2 Signal Input Channel
Horizontal Control System
Signal Source Output (for models with function generator) / External Trigger Input
Probe Compensation Zone
Signal Source (for models with function generator)
Trigger Control System
Hotkey for Operation Mode (Run/Stop, Single SEQ, Auto Set)
Function Menu Key
Multi-function Control Knob
Function Call Keys
Display/Hide Menu Key

1.4. User Interface

This section helps you understand the front panel controls of this series of digital oscilloscopes before use.

Oscilloscope Screen Elements:

Hantek Logo
Trigger Status: Indicates the trigger state. Options include AUTO (operates in automatic mode, acquiring waveforms without a trigger), READY (all data before the trigger signal has been acquired, oscilloscope ready for trigger), ROLL (continuously displays waveform data), STOP (acquisition stopped), ARM1/ARM (PLD receives pre-trigger data).
Main Time Scale of the current window.
Measurement Frequency.
Data Storage.
Horizontal Trigger Time.
Menu display provides information for corresponding system keys.
USB Connected Indicator: If this icon is lit/active, it means a USB drive is connected.
Signal Source Information (applicable only for models with a function generator).
Channel Information: Coupling, bandwidth, and Volts/Div for CH1~CH2.
Channel Indicator.
Trigger Level.

2. Function Description

2.1. Menu and Control Keys

All keys have the following descriptions:

Menu Keys

[SAVE/RECALL]: Menu for saving and recalling files, such as waveforms and settings.
[MEASURE]: Menu for measuring waveform parameters like frequency and amplitude.
[ACQUIRE]: Menu for setting acquisition parameters like acquisition mode and memory depth.
[UTILITY]: Menu for auxiliary functions, system information, system updates, and self-calibration.
[CURSOR]: Menu for cursor measurements. Use the V0 knob to adjust cursor position.
[DISPLAY]: Menu for display parameters, adjusting waveform brightness, grid type, and persistence.

Operation Mode Keys

[AUTO SET]: Automatically sets the oscilloscope control state to display a suitable waveform.
[RUN/STOP]: Continuously acquires waveforms or stops acquisition.
[SINGLE SEQ]: Acquires a single signal and then stops.

Quick Access Keys

[DEFAULT SETUP]: Restores factory default settings.
[HELP]: View the "Help" message. Press the key again to exit help.
[SAVE TO USB]: Quickly save a screenshot to a USB drive. Ensure a USB drive is inserted.
[DECODE]: Set protocol decoding parameters and view decoded data.

2.2. Vertical Control System

2.2.1. Vertical Controls

Vertical controls are used for displaying and removing waveforms, adjusting vertical scale and position, setting input parameters, and performing mathematical calculations. Each channel has an individual vertical menu for settings.

Vertical Controls Description:

Vertical Position Knob: Moves the waveform up or down on the screen. In dual-window mode, it moves waveforms in both windows simultaneously. Pressing the knob resets the waveform to the vertical center position. Two channels correspond to two knobs.
Volts/DIV Knob: Adjusts the oscilloscope's vertical scale to magnify or attenuate the signal. The vertical display size changes according to the ground level.
Channel (CH1, CH2) Menu: Displays vertical menu options; enables or disables the display of the waveform.

Connection Settings

Function	Setting	Comments
Coupling	DC	Passes both DC and AC components of the input signal.
	AC	Blocks the DC component and attenuates signals below 10 Hz.
	GND	Disconnects the input signal.
	OFF	Limits bandwidth to reduce display noise; filters the signal to remove noise and other unwanted high-frequency components.
Div	Coarse	Selects the resolution of the VOLTS/DIV adjustment. Coarse adjustment defines the 1-2-5 sequence.
Div	Fine	Adjusts the resolution in small steps between Coarse settings.
Probe	1x	Select value according to probe attenuation to ensure correct vertical readings. Reduce bandwidth to 6 MHz when using a 1x probe.
	10x	Value is selected according to the probe's attenuation coefficient to ensure correct vertical readings. Reduce bandwidth to 6 MHz when using a 1x probe.
	100x
	1000x
	Invert		OFF	Normal display.
ON	Inverts the displayed waveform by 180 degrees relative to the ground level. When the oscilloscope triggers on an inverted signal, the trigger signal is also inverted.

2.3. Mathematical Operations

The oscilloscope series supports various mathematical operations between analog channel signals, including addition (+), subtraction (-), multiplication (*), division (/), and FFT. Cursors can be used for measurements. This section covers:

Measurement units for mathematical waveforms.
Mathematical operators.
Setting the scale and offset for mathematical waveforms.

Note: If an analog channel or mathematical function display is truncated (waveform not fully displayed), the resulting mathematical waveform will also be truncated.

Operations and Units:

Operation	Unit
Addition (+) or Subtraction (-)	V
Multiplication (*)	V²
Division (/)	None
FFT	dB, Root Mean Square Voltage

Mathematical operators perform arithmetic operations – addition or subtraction – on any two analog input channels. When selecting addition or subtraction, the values of sources A and B are added or subtracted point by point, and the result is displayed.

Add/Subtract Operation

Press the [Math] key on the front panel to enter the MATH function menu.
Press the Source 1 and Source 2 keys respectively and turn the multi-function knob to select the source for the mathematical operation. Analog channels (CH1~CH2) can be used as Source 1 or Source 2.
Press the Operator key and turn the universal knob to select + or - to perform addition or subtraction. The resulting mathematical waveform is displayed on the screen and labeled "M".
Press the Scale key and turn the multi-function knob to select the vertical scale.
Press the Offset key and turn the multi-function knob to set the offset.

Multiply and Divide Operation

Mathematical operators perform arithmetic operations of multiplication or division on any two analog input channels. When multiplication or division is selected, the values of Source 1 and Source 2 are multiplied or divided point by point, and the result is displayed.

Press the [Math] key on the front panel to enter the MATH function menu.
Press the Source 1 and Source 2 keys respectively and turn the multi-function knob to select the source for the mathematical operation. Analog channels (CH1~CH2) can be used as Source 1 or Source 2.
Press the Operator key and turn the universal knob to select * or / to perform multiplication or division. The resulting mathematical waveform is displayed on the screen and labeled "M".
Press the Scale key and turn the multi-function knob to select the vertical scale.
Press the Offset key and turn the multi-function knob to set the offset.

FFT (Fast Fourier Transform)

FFT is used to calculate the Fast Fourier Transform using analog input channels or reference waveforms. FFT converts a digitized time-domain record of a source into the frequency domain. When the FFT function is selected, the FFT spectrum is plotted on the oscilloscope display as a function of dBV versus frequency. The horizontal axis changes from time to frequency (Hertz), and the vertical axis changes from volts to dB. The mathematical calculation function can convert 2048 central points of the time-domain waveform into an FFT spectrum. The final FFT spectrum contains 1024 points from DC (0 Hz) to the Nyquist frequency. Typically, the display screen compresses the FFT spectrum horizontally to 250 points, but you can use "FFT zoom" to expand the FFT spectrum to more clearly view the frequency components of each of the 1024 data points in the FFT spectrum. FFT operation can facilitate the following tasks:

Measurement of harmonic components and distortions in a system.
Measurement of noise characteristics in a DC circuit.
Vibration analysis.

To display the FFT waveform:

Press the [Math] key on the front panel to open the MATH function menu.
Press the Operation key, then turn the multi-function knob to select FFT. The resulting mathematical waveform will be displayed on the screen and labeled "M".
Press the Source key, then turn the multi-function knob to select the source for the FFT operation. Analog channels (CH1~CH2) can be used.
Press the Center key, then turn the multi-function knob to adjust the signal frequency in the frequency domain corresponding to the horizontal center of the screen.
Press the Span key, then turn the multi-function knob to adjust the horizontal scale of the frequency-domain waveform.
Press the Vertical Units key to select the vertical axis units. Units can be dB or Root Mean Square Voltage, which use logarithmic or linear scales for vertical amplitude display, respectively.
Press the Scale key to select the vertical scale.
Press the Window key, then turn the multi-function knob to select the appropriate window.

Spectral component leakage can be significantly reduced by using a window function. This series of instruments provides six types of FFT window functions, each with different characteristics, applicable to measuring various signal types. You must select the window function according to the signal characteristics. Please refer to the table below to select a suitable option based on the input signal.

FFT Window Functions

Window	Measurement	Description
Rectangular	Impulse or transient waveform	Special purpose window, applicable to intermittent waveforms. It is effectively the same as no window.
Hanning	Periodic waveform	Better frequency accuracy, worse amplitude accuracy than Flattop.
Hamming	Transient or short impulse	Slightly better frequency resolution than Hanning.
Blackman	Single-frequency signal, search for higher-order harmonics.	Best amplitude resolution; worst frequency resolution.
Bartlett	Narrowband signal with higher intensity	Best frequency resolution.
Flattop	Periodic waveform	Best amplitude, worst frequency accuracy compared to Hanning.

2.4. Trigger System

The trigger determines when the oscilloscope starts acquiring data and displaying waveforms. With proper trigger settings, unstable displays or blank screens can be converted into meaningful signal waveforms. Below are some basic details about trigger operation.

Trigger Source

A trigger can be generated from multiple sources. The most common is the input channel (CH1~CH2). Regardless of whether the input signal is displayed, it can trigger normal operations. Any signal connected to the external trigger channel can also be a trigger source (only for Edge mode).

Trigger Modes

You can select Auto or Normal mode to determine how the oscilloscope acquires data when trigger conditions are not met. Auto mode collects data freely when there is no valid trigger. It allows waveform acquisition without a trigger with a time base set to 100 ms/div or slower. Normal mode updates the displayed waveform only when the oscilloscope detects a valid trigger condition. Until then, it continues to display the old waveform. This mode should be used when you only need to view effectively triggered waveforms. In this mode, the oscilloscope displays the waveform only after the first trigger. To capture a single sequence, press the [Single] key.

Trigger Position

The horizontal position knob sets the time between the trigger mechanism and the center of the screen.

Trigger Level

Sets the amplitude level that the signal must cross to trigger, using the Edge or Pulse Width mechanism.

Force Trigger

Used to complete data acquisition regardless of whether an adequate trigger signal is present. This button becomes useless once acquisition is stopped.

Trigger Holdoff

To use the Trigger Holdoff function, press the Trig Menu and then the Holdoff key. The Trigger Holdoff function can be used to create a stable display of complex waveforms (e.g., pulses). Holdoff is the time between the oscilloscope detecting one trigger event and being ready to detect another. During the holdoff time, the oscilloscope does not trigger. For pulse sequences, the holdoff time can be adjusted to trigger only on the first pulse in the sequence.

Trigger Diagram Description: A diagram illustrating trigger points and data acquisition intervals. It shows the trigger level, trigger points, and data acquisition intervals with 'Удержание' (Holdoff) periods indicated.

2.5. Horizontal Controls

Use the horizontal controls to adjust the horizontal scale and position of the waveform. The horizontal position indicator shows the time represented at the center of the screen, using the trigger point at the zero mark. When adjusting the horizontal scale, the waveform expands or compresses towards the center of the screen. Readings in the upper right corner show the current horizontal position in seconds. The oscilloscope also has a pointer arrow on the upper part of the display for indicating horizontal position.

Horizontal Position Knob: Used to control the position of the trigger mechanism relative to the screen center. Pressing this knob resets the trigger point to the screen center.
SEC/DIV Knob: Used to adjust the time scale, expanding or compressing the waveform horizontally. If waveform acquisition is paused (using the [Run/Stop] or [Single] key), the SEC/DIV regulator expands or compresses the waveform.

2.6. Signal Source and Connectors

2.6.1. Signal Source Settings

The signal source menu is used to set signal parameters like waveform, frequency, and offset. It can also be used for external triggering.

[EXT TRIG/WAVE GEN] Menu: Used to set signal source parameters, such as waveform, frequency, and offset. Can also be used for external triggering.
[BURST/GEN TRIG] Menu: Used for manual triggering of the waveform with a specified number of cycles.

2.6.2. Connectors

CH1, CH2: Input connectors for the measured signal.

EXT TRIG/GEN OUT: A multiplexed connector that can be used to output the signal source waveform and input an external trigger signal. External triggering can occur on the third channel during data acquisition. Note: The GEN OUT function is only valid for models with a built-in function generator.

3. Multi-function Knobs and Software Keys

3.1. V0 Knob

The V0 is a multi-function knob. Under various menu items (specifically for viewing menu operations), it supports menu item selection, cursor movement, and level adjustment. Pressing the knob selects a menu item, resets data (trigger hold time), and rotating it adjusts data bits, etc., making operations very convenient.

3.2. Wave Gen

Used to enable the signal source function (only for models with a function generator).

3.3. Hide/Show Key

The Hide/Show software key. Press it to hide menu options on the right side of the screen and display the waveform in full screen. Press it again to show the menu parameters.

3.4. F1-F5 Keys

These five software keys are multi-functional. They are responsible for selecting the corresponding menu parameters on the screen in various menu modes.

3.5. F6 Key

This function key is used for turning pages and confirming selections, for example, "next page" or "previous page".

4. Oscilloscope Setup

While operating the oscilloscope, you may frequently use four functions: Auto Setup, Save Settings, Recall Settings, and Default Setup. These are presented in order.

4.1. Auto Setup

This function can be used to automatically set the horizontal and vertical scales of the oscilloscope, trigger settings, type, position, slope, level, mode, etc., to obtain a stable waveform display.

4.2. Save/Recall Settings

By default, the oscilloscope saves settings each time before shutting down and automatically recalls them upon startup. (Note: If you change settings, please wait more than 10 seconds before turning off the oscilloscope to ensure new settings are saved correctly). You can permanently save up to 10 settings on the oscilloscope and recall them as needed.

4.3. Default Setup

When shipped from the factory, the oscilloscope is pre-configured for normal operation. These are the factory default settings. You can restore these settings at any time for your operations.

5. Using Cursors

To perform cursor measurements, press the Cursors key, then turn the knob to move the cursors, and then press the Mode key to select Manual or Track. Use cursors AX and BX for measuring frequency and the difference between two frequency values (BX-AX). Use cursors AY and BY for measuring amplitude in dB and amplitude difference (BY-AY).

5.1. Cursor Measurements for FFT Waveforms

To perform cursor measurements on FFT waveforms, press the Cursors key, then turn the knob to move the cursors, and then press the Mode key to select Manual or Track. Use cursors AX and BX for measuring frequency and the difference between two frequency values (BX-AX). Use cursors AY and BY for measuring amplitude in dB and amplitude difference (BY-AY).

6. Trigger System

6.1. Trigger Source

6.2. Trigger Modes

6.3. Trigger Position