DreamSourceLab DSTouch Bedienungsanleitung

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DSTouch Oscilloscope

User Guide

V0.99

DSTouch User Guide

www.dreamsourcelab.cn 2

Revision History

Revision history:

Date (YY/MM/DD)

Version

Description

2023/05/23

V0.99

Added introduction to decoders and FFT.

2022/12/11

V0.98

Initial version.

DSTouch User Guide

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Contents

CONTENTS ................................................................................................................................. 3

CHAPTER 1. INTRODUCTION.................................................................................................... 5

1.1 Overview..........................................................................................................................................................5

1.2 Basic Operations .............................................................................................................................................5

1.2.1 Power On/Off........................................................................................................................................................ 6

1.2.2 Charging................................................................................................................................................................ 6

1.2.3 User Interface ....................................................................................................................................................... 7

1.2.4 Run/Stop ............................................................................................................................................................... 7

1.2.5 Autoset.................................................................................................................................................................. 8

1.3 Probe Compensation .......................................................................................................................................9

1.4 Measure Signals ............................................................................................................................................10

1.4.1 Probe Settings ....................................................................................................................................................10

1.4.2 Connection..........................................................................................................................................................11

1.4.3 Grounding............................................................................................................................................................12

1.5 Precautions ...................................................................................................................................................13

1.5.1 Measurement Range ..........................................................................................................................................13

1.5.2 Withstand Voltage Range ..................................................................................................................................13

1.5.3 Probe Limitations ...............................................................................................................................................13

CHAPTER 2. OPERATION........................................................................................................ 15

2.1 Horizontal System .........................................................................................................................................15

2.1.1 Timebase ............................................................................................................................................................15

2.1.2 Roll.......................................................................................................................................................................16

2.1.3 Horizontal Position.............................................................................................................................................17

2.1.4 Storage Depth .....................................................................................................................................................18

2.1.5 Interpolation........................................................................................................................................................19

2.2 Vertical System .............................................................................................................................................20

2.2.1 Channel Settings.................................................................................................................................................20

2.2.2 Vertical Sensitivity ..............................................................................................................................................20

2.2.3 Vertical Offset.....................................................................................................................................................22

2.3 Trigger system ..............................................................................................................................................24

2.3.1 Trigger Position ..................................................................................................................................................24

2.3.2 Trigger Level .......................................................................................................................................................25

2.3.3 Trigger Modes ....................................................................................................................................................26

2.3.4 Trigger Source ....................................................................................................................................................27

2.3.5 Trigger Type........................................................................................................................................................27

2.3.6 Sensitivity............................................................................................................................................................28

2.3.7 Trigger Holdoff ...................................................................................................................................................29

2.4 Single Acquisition..........................................................................................................................................30

2.5 Quick Menu ...................................................................................................................................................30

2.6 Auto Measurements ......................................................................................................................................32

2.6.1 Vertical Measurements......................................................................................................................................33

2.6.2 Horizontal Measurements .................................................................................................................................33

DSTouch User Guide

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2.6.3 Add/Delete Measurements................................................................................................................................34

2.7 Cursor Measurement .....................................................................................................................................35

2.7.1 H Bars..................................................................................................................................................................35

2.7.2 V Bars ..................................................................................................................................................................36

2.8 Display...........................................................................................................................................................36

2.8.1 X-Y Mode............................................................................................................................................................. 36

2.8.2 Persistence Mode............................................................................................................................................... 37

2.8.3 Clear Screen........................................................................................................................................................38

2.8.4 Grid Lines ............................................................................................................................................................ 38

2.9 Calibration .....................................................................................................................................................39

2.10 Signal Generator............................................................................................................................................41

2.10.1 Run/Stop ............................................................................................................................................................. 41

2.10.2 Frequency ...........................................................................................................................................................42

2.10.3 Amplitude............................................................................................................................................................42

2.10.4 Signal Type .........................................................................................................................................................43

2.11 Protocol Decoders .........................................................................................................................................43

2.11.1 Add/Delete Decoder ...........................................................................................................................................43

2.11.2 Decoder Results .................................................................................................................................................44

2.12 FFT ................................................................................................................................................................45

2.12.1 Parameter Settings.............................................................................................................................................45

2.12.2 Center Frequency ...............................................................................................................................................46

2.12.3 Frequency Range ................................................................................................................................................46

2.12.4 Spectrum Measurement ....................................................................................................................................47

2.13 File ................................................................................................................................................................48

2.13.1 Sessions..............................................................................................................................................................49

2.13.2 Screenshot and Gallery ......................................................................................................................................49

2.13.3 Disk Usage ..........................................................................................................................................................50

2.13.4 USB Mode ...........................................................................................................................................................50

2.13.5 Disk Format.........................................................................................................................................................50

2.14 System Settings ............................................................................................................................................51

2.14.1 Backlight and Sound ..........................................................................................................................................51

2.14.2 About...................................................................................................................................................................51

2.14.3 Language ............................................................................................................................................................52

CHAPTER 3. EXAMPLES ......................................................................................................... 53

3.1 Simple periodic signals..................................................................................................................................53

3.1.1 Acquisition: ......................................................................................................................................................... 53

3.1.2 Measurement......................................................................................................................................................53

3.2 Power Supply Ripple ......................................................................................................................................54

3.3 Crystal oscillator signal .................................................................................................................................55

3.3.1 Basic Setup .........................................................................................................................................................55

3.3.2 Trigger Setup ...................................................................................................................................................... 56

3.4 X-Y Function ..................................................................................................................................................56

3.5 Amplitude Modulated (AM) Wave ..................................................................................................................57

DSTouch User Guide

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Chapter 1. Introduction

1.1 Overview

The DSTouch oscilloscope combines the high performance of a desktop oscilloscope with the touch screen

experience of a smartphone. In terms of performance, it utilizes FPGA-based hardware waveform engine

architecture, and a large storage depth based on DRAM. In terms of operation, it creatively designed a set of

"single-finger touch" methods, simplifying all functions into 1-3 tap and swipe operations

Furthermore, the DSTouch oscilloscope is equipped with a built-in high-capacity lithium battery, making it an

ideal palm-sized portable instrument

Main Features:

FPGA-based hardware waveform engine, ensuring no lag and ultra-high refresh rate.

DRAM-based large waveform buffer, with a maximum storage depth of up to 16Mpts.

Dual-channel input, with a real-time sampling rate of up to 1GSa/s and a maximum bandwidth of up to

150MHz.

4.3-inch IPS capacitive touchscreen, providing a smooth UI experience and convenient control logic.

Ultra-fast 1-second boot time, with one-click autoset of stable waveforms.

Multiple global configuration files can be saved and easily loaded with a single click.

Supports auto measurement of 20 parameters.

Built-in signal generator.

Supports adjustment of trigger sensitivity and hold-off time, meeting waveform capture requirements in

various scenarios.

Large-capacity lithium battery for extended battery life.

Supports user-side firmware upgrade operations.

Reserved rich function expansion interfaces.

Supports on-the-fly switching between Chinese and English language interfaces.

1.2 Basic Operations

The DSTouch oscilloscope has a compact size that fits perfectly in the palm of your hand

(129mmx77mmx20mm). The oscilloscope features a high screen-to-body ratio with a 4.3-inch IPS capacitive

touch screen on the front. On the side of the device, essential function buttons are retained, including the power

button on the left and the "Run/Stop" and "Auto" buttons at the top.

While ensuring its compactness, DSTouch uses the standard BNC interface commonly found in desktop

oscilloscopes. This enables the direct use of all standard probes with the DSTouch, ensuring stable and reliable

signal connections without compromising performance and stability due to its size. In addition to the input

channels, the DSTouch also integrates a signal generator function, with waveforms being output externally via

the MCX interface.

The DSTouch's USB port serves not only as a regular charging port but also allows for connections to a PC

for firmware upgrades or exporting various configurations and waveform screenshot files stored in the

oscilloscope. The DSTouch has also reserved multiple extend interface options through extend modules to meet

diverse measurement and debugging requirements in different scenarios.

DSTouch User Guide

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Figure 1-1

1.2.1 Power On/Off

The DSTouch oscilloscope provides a "Long-Press Power On/Off" and "Touch-Controlled Shutdown" to

prevent accidental power toggling. In the power-off state, a 1-second long press of the power button turns the

device on, while in the power-on state, a long press of 3 seconds or more shuts it down.

Button Power On/Off:

Figure 1-2

1.2.2 Charging

The DSTouch oscilloscope is equipped with a built-in high-capacity lithium battery that can be charged

through the USB port located on the left side of the device. The charging input supports a maximum of 5V/2A. It

is important to ensure that the input voltage during charging does not exceed 5V, as higher voltages may

damage the instrument.

The DSTouch oscilloscope supports "Charge while using" functionality and features intelligent power

distribution to ensure that measurements are not affected during the charging process. In extreme cases, such

as battery damage, the DSTouch can also operate independently through external power supply.

During regular charging, the charging indicator light on the left side of the instrument remains a constant

Probe Calibration

Reference

Probe Extension Port

Charging Contacts

Charging Indicator

Power Indicator

USB Port

Expansion Port

Power Switch

Run/Stop

Auto

BNC Connector

Signal Generator

MCX Port

Shutdown state, press and hold for

1 second to power on

Power-on state, press and hold for

3 seconds to power off

DSTouch User Guide

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red color. Once the charging is complete, the indicator light turns off. If the indicator light keeps flashing, it

indicates a charging malfunction.

Figure 1-3

1.2.3 User Interface

With the single-finger touch interface, the DSTouch oscilloscope allows users to effortlessly perform all

measurement operations. Through optimization of interaction, traditional multi-step operations on conventional

oscilloscopes can now be accomplished within just 1-3 touch gestures on this device.

Figure 1-4

1.2.4 Run/Stop

As the most frequently used feature, the DSTouch oscilloscope provides two methods for running and

stopping waveform acquisition: physical buttons and touch buttons.

DSTouch

Computer

Power adapter

Power bank

Vertical

Sensitivity

Channel 1

Label

Channel 0

Label

Automatic Measurement Display Area

Run/Stop

Function

Single Trigger

Enabled

Trigger position

Running state

Current waveform

position

Horizontal Timebase

Battery Display &

System Menu

Auto Setup

Channel Menu

Channel On/Of

Trigger level

Logo & Version

Information

DSTouch User Guide

www.dreamsourcelab.cn 8

Button Run/Stop:

Figure 1-5

Touch Run/Stop:

Figure 1-6

1.2.5 Autoset

The DSTouch oscilloscope offers both a physical "Auto" button and touch-controlled buttons to facilitate

autoset. When the user has not actively selected any channel, the autoset program will start detecting enabled

channels, beginning from Channel 0. It will then automatically designate the channel that first detects a

waveform transition as the active channel for autoset.

Alternatively, users can manually specify a channel for autoset by simply selecting the corresponding

channel as shown in Figure 1-8 and then initiating the autoset.

Button Auto:

Figure 1-7

Touch Auto:

Run/Stop Acquisition

Run/Stop

Acquisition

Auto Button

DSTouch User Guide

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Figure 1-8

1.3 Probe Compensation

When using some probes such as 10X/100X attenuated probes, it is essential to ensure the oscilloscope's

input capacitance matches the probe's compensation capacitance to correctly measure AC signal waveforms.

Before the initial use of a specific probe on a new oscilloscope, it is necessary to adjust the probe's

compensation capacitance. The specific adjustment method is as follows:

1）Set the switch on the probe to 10X (or other desired attenuation setting) and connect it to the desired

channel of the oscilloscope. Connect the probe signal terminal to the probe compensation reference signal

(1KHz square wave), and the ground clip to the oscilloscope's ground terminal. Enable only the target channel on

the oscilloscope, and then click "Run" to initiate the Auto automatic setup.

Figure 1-9

2）The captured waveform on the oscilloscope is shown in Figure 1-10. If the waveform is found to be

improperly compensated, you can use the non-metallic adjustment tool to adjust the probe's variable

capacitance. Make adjustments until the waveform matches the correctly compensated waveform in the center.

Select Channel

Click "Auto"

Probe Compensation

Capacitor Position

DSTouch User Guide

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Figure 1-10

1.4 Measure Signals

1.4.1 Probe Settings

The DSTouch oscilloscope comes equipped with a standard BNC interface, making it compatible with

various types of BNC probes. To accommodate different probe attenuation ratios, the DSTouch oscilloscope

offers attenuation adaptation settings ranging from 0.1X to 1000X (in 1-2-5 steps).

Users need to select the right probe ratio based on the actual attenuation ratio of the currently connected

probe, and then oscilloscope will show accurate measurement results.

For example, as shown in Figure 1-11, when using a 10X probe, simply set the probe ratio to 10X in the UI

settings.

Figure 1-11

Except the single-ended passive probes, users can also use differential probes for measuring differential

signals. Additionally, users have the option to employ current probes for testing current signals. The DSTouch

oscilloscope supports the switching between voltage and current display.

Insufficient compensation

Correct compensation

Excessive compensation

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