DreamSourceLab DSTouch User manual

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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

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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.

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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
Menu
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

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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
1
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.
1
2
Select Channel
Click "Auto"
Probe Compensation
Capacitor Position

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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