VOLTCRAFT DSO-2104 User manual

DSO-2104
Digital Storage Oscilloscope
User Manual

General Warranty
We warrant that the product will be free from defects in materials and workmanship
for a period of 3 years from the date of purchase of the product by the original
purchaser from our company. The warranty period for accessories such as probes
is 12 months. This warranty only applies to the original purchaser and is not
transferable to a third party.
If the product proves defective during the warranty period, we will either repair the
defective product without charge for parts and labour, or will provide a replacement
in exchange for the defective product. Parts, modules and replacement products
used by our company for warranty work may be new or reconditioned like new. All
replaced parts, modules and products become the property of our company.
To obtain service under this warranty, the customer must notify our company of the
defect before the expiration of the warranty period. Customer shall be responsible
for packaging and shipping the defective product to our designated service centre,
a copy of the customer's proof of purchase is also required.
This warranty shall not apply to any defect, failure or damage caused by improper
use or improper or inadequate maintenance and care. We shall not be obligated to
furnish service under this warranty a) to repair damage resulting from attempts by
personnel other than our company representatives to install, repair or service the
product; b) to repair damage resulting from improper use or connection to
incompatible equipment; c) to repair any damage or malfunction caused by the use
of not our supplies; or d) to service a product that has been modified or integrated
with other products when the effect of such modification or integration increases
the time or difficulty of servicing the product.
Please contact the nearest sales and service offices for services.
Excepting the after-sales services provided in this summary or the applicable warranty
statements, we will not offer any guarantee for maintenance definitely declared or
hinted, including but not limited to the implied guarantee for marketability and
special-purpose acceptability. We should not take any responsibilities for any indirect,
special or consequent damages.

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Table of Contents
1. General Safety Requirements.......................................................................................... 1
2. Safety Terms and Symbols............................................................................................... 2
3. Quick Start ....................................................................................................................... 4
Introduction to the Structure of the Oscilloscope...........................................................4
Front Panel........................................................................................................................................4
Rear Panel.........................................................................................................................................5
Control Area......................................................................................................................................6
User Interface Introduction...................................................................................................7
How to Implement the General Inspection........................................................................9
How to Implement the Function Inspection......................................................................9
How to Implement the Probe Compensation..................................................................10
How to Set the Probe Attenuation Coefficient................................................................11
How to Use the Probe Safely..............................................................................................12
How to Implement Self-calibration....................................................................................13
Introduction to the Vertical System ..................................................................................13
Introduction to the Horizontal System .............................................................................14
Introduction to the Trigger System...................................................................................15
4. Advanced User Guidebook ............................................................................................ 17
How to Set the Vertical System ...............................................................................................18
Use Mathematical Manipulation Function.............................................................................19
The Waveform Calculation.................................................................................................................20
Using FFT function ............................................................................................................................20
Use Vertical Position and Scale Knobs ...................................................................................24
How to Set the Horizontal System...........................................................................................24
Zoom the Waveform...........................................................................................................................25
How to Set the Trigger System................................................................................................25
Single Trigger.....................................................................................................................................26
How to Operate the Function Menu .......................................................................................28
How to Set the Sampling/Display .......................................................................................................28
How to Save and Recall a Waveform..................................................................................................30
How to Implement the Auxiliary System Function Setting..................................................................36
How to Update your Instrument Firmware..........................................................................................38
How to Measure Automatically ..........................................................................................................39
How to Measure with Cursors.............................................................................................................44
How to Use Executive Buttons ...........................................................................................................46
5. Communication with PC............................................................................................... 49
6. Demonstration ............................................................................................................... 50

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Example 1: Measurement a Simple Signal .............................................................................50
Example 2: Gain of a Amplifier in a Metering Circuit..........................................................51
Example 3: Capturing a Single Signal....................................................................................52
Example 4: Analyze the Details of a Signal ............................................................................53
Example 5: Application of X-Y Function ...............................................................................55
Example 6: Video Signal Trigger............................................................................................56
7. Troubleshooting............................................................................................................. 58
8. Technical Specifications................................................................................................ 58
General Technical Specifications ............................................................................................61
9. Appendix ........................................................................................................................ 62
Appendix A: Enclosure............................................................................................................62
Appendix B: General Care and Cleaning...............................................................................62

1.General Safety Requirements
1
1. General Safety Requirements
Before use, please read the following safety precautions to avoid any
possible bodily injury and to prevent this product or any other connected
products from damage. To avoid any contingent danger, ensure this product
is only used within the ranges specified.
Only a qualified person should perform internal maintenance.
To avoid Fire or Personal Injury:
Use Proper Power Cord. Use only the power cord supplied with the product
and certified to use in your country.
Connect or Disconnect Correctly. When the probe or test lead is connected
to a voltage source, please do not connect and disconnect the probe or test
lead.
Product Grounded. This instrument is grounded through the power cord
grounding conductor. To avoid electric shock, the grounding conductor must be
grounded. The product must be grounded properly before any connection with
its input or output terminals.
When the instrument is powered by AC, do not measure AC power
sources directly otherwise it will cause a short circuit. This is because
the testing ground and power cord ground conductor are connected.
Check all Terminal Ratings. To avoid fire or shock hazard, check all ratings
and markings on this product. Refer to the user manual for more information
about ratings before connecting to the instrument.
Do not operate without covers. Do not operate the instrument with covers or
panels removed.
Use the Proper Fuse. Use only the specified type and rating fuse for this
instrument.
Avoid exposed circuit. Be careful when working on exposed circuitry to avoid
risk of electric shock or other injury.
Do not operate if any damage. If you suspect damage to the instrument,
have it inspected by qualified service personnel before further use.
Use your Oscilloscope in a well-ventilated area. Make sure the instrument
installed with proper ventilation.
Do not operate in damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.

2.Safety Terms and Symbols
2
2. Safety Terms and Symbols
Safety Terms
Terms in this manual (The following terms may appear in this manual):
Warning: Warning indicates conditions or practices that could result in
injury or loss of life.
Caution: Caution indicates the conditions or practices that could result in
damage to this product or other property.
Terms on the product. The following terms may appear on this product:
Danger: Indicates an immediate hazard or injury possibility.
Warning: Indicates a possible hazard or injury.
Caution: Indicates potential damage to the instrument or other property.
Safety Symbols
Symbols on the product. The following symbol may appear on the product:
Hazardous Voltage
Refer to Manual
Protective Earth Terminal
Chassis Ground
Test Ground

2.Safety Terms and Symbols
3
To avoid body damage and prevent product and connected equipment damage,
carefully read the following safety information before using the test tool. This
product can only be used in the specified applications.
Warning:
The four channels of the oscilloscope are not electrically isolated. The
channels should adopt a common ground during measuring. To prevent
short circuits, the 2 probe grounds must not be connected to 2 different
non-isolated DC levels.
The diagram of the oscilloscope ground wire connection:
Ground Clip
Signal Input
Oscilloscope Electrical OutletProbe
Power Cord
It is not allowed to measure AC power when the AC powered oscilloscope is
connected to the AC-powered PC through the ports.
Warning:
To avoid fire or electrical shock, when the oscilloscope input
signal connected is more than 42V peak (30Vrms) or on circuits of
more than 4800VA, please take note of below items:
Only use accessory insulated voltage probes and test lead.
Check the accessories such as probe before use and
replace it if there are any damages.
Remove probes, test leads and other accessories
immediately after use.
Remove USB cable which connects oscilloscope and
computer.
Do not apply input voltages above the rating of the
instrument because the probe tip voltage will directly
transmit to the oscilloscope. Use with caution when the
probe is set as 1:1.
Do not use exposed metal BNC or banana plug connectors.
Do not insert metal objects into connectors.

3.Quick Start
4
3. Quick Start
Introduction to the Structure of the Oscilloscope
This chapter makes a simple description of the operation and function of the front
panel of the oscilloscope, enabling you to be familiar with the use of the
oscilloscope in the shortest time.
Front Panel
The front panel has knobs and function buttons. The 5 buttons in the column on
the right side of the display screen are menu selection buttons, through which, you
can set the different options for the current menu. The other buttons are function
buttons, through which, you can enter different function menus or obtain a specific
function application directly.
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56
1 2
74
Figure 3-1 Front panel
1. Display area
2. Menu selection buttons: Select the right menu item.
3. Control (button and knob) area
4. Probe Compensation: Measurement signal (5V/1kHz) output.
5. Signal Input Channel
6. USB Host port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "host device". For example: Saving
the waveform to USB flash disk needs to use this port.
7. Power on/off

3.Quick Start
5
Rear Panel
5
12
3
4
Figure 3-2 Rear Panel
1. Handle
2. Air vents
3. AC power input jack
4. Foot stool: Adjust the tilt angle of the oscilloscope.
5. USB Device port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "slave device". For example: to use
this port when connect PC to the oscilloscope by USB.

3.Quick Start
6
Control Area
1
2
3
4
5
6
Figure 3-3 Control Area Overview
1. Function button area: Total 6 buttons.
2. Horizontal control area with 1 button and 2 knobs.
"HOR" button refer to horizontal system setting menu, "Horizontal Position"
knob control trigger position, " Horizontal Scale" control time base.
3. Trigger control area with 2 buttons and 1 knob.
The Trigger Level knob is to adjust trigger voltage. Other 2 buttons refer to
trigger system setting.
4. Copy button: This button is the shortcut for Save function in the Utility function
menu. Pressing this button is equal to the Save option in the Save menu. The
waveform, configure or the display screen could be saved according to the
chosen type in the Save menu.
5. Vertical control area with 5 buttons and 2 knobs.
CH1 - CH4 buttons correspond to setting menu in CH1 - CH4. "Math" button
provides access to math waveform functions (+, -, ×, /, FFT). The "Vertical
Position" knob control the vertical position of current channel, and the