Owon SDS series User manual

SDS Series
Smart Digital Storage Oscilloscopes
Service Manual
&SDS6062
&SDS7102
&SDS8102
&SDS8202
WWW.OWON.COM.CN

Copyright ©Lilliput, Inc. All rights reserved
Lilliput products are covered by U.S. and other patents, issued and pending. Information in this
publication supersedes that in all previously published material. Specifications and price change
privileges reserved.
The information in this manual was correct at the time of printing. However, OWON will
continue to improve products and reserves the rights to changes specification at any time
without advance notice, for latest information, please refer to our website.
OWON is registered trademark of Lilliput, Inc.
Xiamen Lilliput Technology Co.,Ltd.: the 5th floor, B Area, Chuangxin Mansion, Software Park,
ZhenZhuWan, Huandao RD, Xiamen, Fujian, China
Tel: [phone] Fax: [phone]
Web: www owon.com.cn Mail: [e-mail]
Fujian Lilliput Optoelectronics Technology Co., Ltd.: The mansion of optoelectronics hengsan
road, Lantian industrial zone, Zhangzhou, Fujian, China
Tel: [phone] Fax: [phone]
Web: www.owonchina.com Mail: [e-mail]

LIMITED WARRANTY & LIMITATION OF LIABILITY
Each Owon product is warranted to be free from defects in material and workmanship under
normal use and service. The warranty period of oscilloscope is three years and the warranty period
of accessories is one year, and begins on the date of shipment. Parts, product repairs and services
are warranted for 90 days. This warranty only apply to the original buyer or customers of a Owon
authorized dealer, and does not apply to fuses, disposable batteries or to any product which, in
Owon’s opinion, has been misused, altered, neglected or damaged by accident or abnormal
conditions of operation or handling. Owon warrants that software will operate substantially in
accordance with its functional specifications for 90 days and that it has been properly recorded on
non-defective media. Owon does not warrant that software will be error free or operate without
interruption.
Owon authorized dealer shall extend this warranty on new and unused products to end-user
customers only but have no authority to extend a greater or different warranty on behalf of Owon.
Warranty support is available if product is purchased through an Owon authorized sales outlet or
Buyer has paid the applicable international price. Owon reserves the right to invoice Buyer for
importation costs of repair/replacement parts when product purchased in one country is submitted
for repair in another country.
Owon’s warranty obligation is limited, at Owon’s option, to refund of the purchase price, free of
charge repair, or replacement of a defective product which is returned to an Owon authorized
service center within the warranty period.
To obtain warranty service, contact your nearest Owon authorized service center or send the
product, with a description of the difficulty, postage and insurance prepaid (FOB Destination), to
the nearest Owon authorized service center. Owon assumes no risk for damage in transit.
Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB
Destination). If Owon determines that the failure was caused by misuse, alteration, accident or
abnormal condition of operation or handling, Owon will provide an estimate of repair costs and
obtain authorization before commencing the work. Following repair, the product will be returned
to the Buyer transportation prepaid and the Buyer will be billed for the repair and return
transportation charges (FOB Shipping Point).
This warranty is Buyer’s sole and exclusive remedy and is in lieu of all other warranties, express
or implied, including but not limited to any implied warranty of merchantability or fitness for a
particular purpose. Owon shall not be liable for any special, indirect, incidental or consequential
damages or losses, including loss of data, whether arising from breach of warranty or based on
contract, tort reliance or any other theory.
Since some countries or states do not allow limitation of the term of an implied warranty, or
exclusion or limitation of incidental or consequential damages, the limitations and exclusions of
this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or
unenforceable by a court of competent jurisdiction, such holding will not affect the validity or
enforceability of any other provision.
SERVICES CENTER
To locate an authorized services center, visit us on the World Wide Web:
WWW.OWON.COM.CN

Table of Contents
Table of Contents ...............................................................................................................................i
List of Figures ...................................................................................................................................ii
List of Tables.....................................................................................................................................ii
General Safety Summary ................................................................................................................ iii
Section 1: General Information.........................................................................................................1
1.1 Introduction.........................................................................................................................1
1.2 Accessories Supplied...........................................................................................................1
1.3 Technical Specifications......................................................................................................1
1.4 General Technical Specifications ........................................................................................6
1.5 Declaration of Conformity ..................................................................................................7
Section 2: Installation........................................................................................................................8
2.1 Performing the General Inspection .....................................................................................8
2.2 Operating Environment.......................................................................................................8
2.3 Storage and Transport .........................................................................................................8
2.4 Packaging ............................................................................................................................9
2.5 Tagging for Service .............................................................................................................9
2.6 Power Supply Requirement.................................................................................................9
2.7 Cleaning Requirements .......................................................................................................9
Section 3: Test and Calibration .......................................................................................................10
3.1 Equipment for Testing .......................................................................................................10
3.2 Test Standard .....................................................................................................................10
3.3 Inspection Items and Methods...........................................................................................10
Section 4: Debugging and Calibration ............................................................................................17
4.1 Brief Introduction..............................................................................................................17
4.2 Tools and Devices .............................................................................................................17
4.3 The Interval Time to Calibration.......................................................................................17
4.4 Auto-calibration ................................................................................................................17
4.5 Attenuation Compensation Capacitance Calibration.........................................................17
Section 5: Maintenance...................................................................................................................18
5.1 Brief Introduction..............................................................................................................18
5.2 Preparation and Safety Event ............................................................................................18
5.3 Circuit Diagram.................................................................................................................18
5.4 Removal and Installation Procedures ................................................................................20
5.6 Examination and Maintenance ..........................................................................................36
Section 6: Replaceable Parts ...........................................................................................................38
6.1 Replaceable Parts List .......................................................................................................38
6.2 Order Information .............................................................................................................38
i

ii
List of Figures
Figure 1: Connection of sweep rate and error inspection ..................................... 11
Figure 2: Waveform of sweep rate and error inspection .......................................11
Figure 3: Connection of voltage division and error inspection.............................12
Figure 4: Connection of voltage measurement and error inspection ....................12
Figure 5: Connection of transient response inspection.........................................13
Figure 6: Waveform of transient response inspection...........................................13
Figure 7: Connection of vertical movement range inspection ..............................14
Figure 8: Connection of input impedance inspection ...........................................15
Figure 9: Connection of maximum input voltage testing .....................................15
Figure 10: SDS series block diagram....................................................................18
Figure 11: The schematic circuit diagram of the power supply............................20
Figure 12: Remove the Power switch button........................................................20
Figure 13: Remove the Ground Connection .........................................................21
Figure 14,Loosen the screws of battery box ......................................................21
Figure 15: Remove the battery box.......................................................................22
Figure 16: Assemble the battery box ....................................................................22
Figure 17: Remove the screws of rear panel.........................................................24
Figure 18: Unsnap the rear panel (1) ....................................................................24
Figure 19: Unsnap the rear panel (2) ....................................................................25
Figure 20: Disconnect the rear panel ....................................................................25
Figure 21: Remove the battery box container.......................................................26
Figure 22: Cables to power supply board .............................................................27
Figure 23: Screws of power supply board ............................................................27
Figure 24: Disconnect the screen data cable.........................................................28
Figure 25: Screws and cables of the adapter plate................................................29
Figure 26: Remove the adapter plate ....................................................................29
Figure 27: Remove plastic cushion.......................................................................30
Figure 28: Screws of the chassis...........................................................................31
Figure 29: Fan power cable of the chassis............................................................32
Figure 30: Install the chassis (1) ...........................................................................33
Figure 31: Install the chassis (2) ...........................................................................33
Figure 32: Screws secure the main board .............................................................34
Figure 33: Install the main board..........................................................................34
Figure 34: Key board and front panel ...................................................................35
Figure 35: Troubleshooting procedure (1) ............................................................36
Figure 36: Troubleshooting procedure (2) ............................................................37
List of Tables
Table 1: Specifications............................................................................................2
Table 2: General specifications ...............................................................................6
Table 3: Environment..............................................................................................8
Table 4: Replaceable parts list ..............................................................................38

General Safety Summary
General Safety Summary
Operation security
Read the security information carefully before use.
Safety Terms and Symbols
Specific Warning and Caution Terms that Appear throughout the Manual
Warning: “Warning” identifies conditions and actions that pose hazards to the users.
Caution: “Caution” identifies conditions and actions that may damage the product or
other properties.
Terms Used on the Product
The following terms appears possibly on the product:
Danger: The term “Danger” is used in this manual to indicate that when you read this
mark, personal injury may be caused to you immediately.
Warning: The term “Warning” is used in this manual to indicate that when you read this
mark, personal injury may not be caused to you immediately, but you need to
be cautionary.
Notice: The term “Notice” is used in this manual to indicate that damages may be
caused on this product or other properties.
Symbols Used on the Product
The following symbols appear possibly on the product.
High voltage Refer to user
manual
Protective
ground
Measurement
ground
Earth (gr
Term
ound)
inal
iii

General Safety Summary
Safety Requirement
Carefully read the following safety information in order to avoid any personal injury and damage
on this product or any products connected with it. This product can only be used in the specified
applications to prevent any possible dangers.
Only qualified technical personnel are permitted to perform maintenance.
'Prevent fires and personal injuries.
'Use professional power wire. Only use the special power wire that is applied to the user
state.
Connect and cut off in the proper way. Please do not connect or cut off the probe or the
tested wires voluntarily when connecting with the power supply.
'Grounding. Make sure the product is earthed properly by grounding conductor before
connecting with the input or output terminal that is to avoid electric shock.
'Use the probe in a proper way. The grounding terminal of the probe is earth potential.
'Pay attention to the nominal values of all terminals: To avoid fire or electric shock, please
keep a watchful eye on all nominal values and marks specified for this product. Before any
connection performed on this product, carefully read the user’s manual of the product for
further information of nominal values.
'No operation is allowed without the instrument cover plate: If the cover plate or panel has
been removed, do not perform any operation on this product.
'Use the standard fuse conformed to the product with the rating value.
'No touch is allowed on bare conductors: When the product is powered on, do not touch any
bare joints or parts of the scope meter.
'Operation is prohibited in case of any undetermined failure: When in doubt any damage
on this product, consult the qualified personnel for checking on it.
'Keep ventilation in good condition: Read the user manual for detail installation instructions
in order to fix this product correctly and provide it with good ventilation conditions.
'No operation is allowed under a humid environment.
'No operation is allowed under an explosive environment.
'Keep clean and dry on the product surface.
iv

General Safety Summary
To avoid body damage and prevent product and connected equipment damage. This
product can only be used in the specified applications. Carefully read the following
safety information before using the test tool.
Warning:
To avoid fire or electrical shock if a test tool input is connected to more 42V peak (30Vrms)
or on circuits of more than 4800VA:
'Use only insulated voltage probes, test leads and adapter supplied with the test tool, or
indicated by OWON as suitable for the Oscilloscope & Multimeter.
'Before use, inspect voltage probes, test leads and accessories for mechanical damage and
replace when damaged.
'Remove all probes, test leads and accessories that are not in use.
'Remove all the PC communication connection.
'Do not apply input voltages above the rating of the instrument. Please be careful when
using 1:1 test leads because the probe tip voltage will be directly transmitted to the
Oscilloscope & Multimeter.
'Do not use exposed metal BNC or banana plug connectors.
'Do not insert metal objects into connectors.
v

Section 1: General Information
Section 1: General Information
1.1 Introduction
This service manual contains information on adjusting and servicing the SDS Series Oscilloscope.
Chapter General Information simply introduces the specifications of the oscilloscope.
Chapter Installation introduces the theory of installing.
Chapter Test and Calibration simply introduces some theory and method of tests.
Chapter Debugging and Calibration supplies some modules for adjust and some methods.
Chapter Maintenance mainly supplies some parts to customers for service
Chapter Replaceable Parts mainly introduces theories and methods of servicing.
1.2 Accessories Supplied
Standard Accessories:
2 Passive probe: 1.2 m, 1:1 (10:1)
CD: x 1 (PC link application software)
Power cord: 1pcs, up to the standards of the country in which it is used.
USB cable
User Manual: 1pcs
Options:
Battery
1.3 Technical Specifications
Unless otherwise specified, the technical specifications applied are applicable to
the probe with the attenuation switch setting 10X and the SDS series digital
oscilloscope. Only if the oscilloscope fulfill the following two conditions at first,
can these specification standards be reached.
This instrument should run for more than 30 minutes continuously under the
specified operating temperature.
If the change range of the operating temperature is up to or exceeds 5 ,"
open the system function menu and execute the “Auto-calibration” procedure
(see “4.4 Auto-calibration” on P17).
All specification standards can be fulfilled, except one(s) marked with the word
“Typical”.
1

Section 1: General Information
Table 1: Specifications (cont.)
Performance Characteristics Instruction
SDS6062 60MHz
SDS7102 100MHz
SDS8102 100MHz
Bandwidth
SDS8202 200MHz
Channel 2 + 1 (External)
Mode Normal, Peak detect, Averaging
SDS6062 500MS/s
(250MS/s for dual channels)
SDS7102 1GS/s
(500MS/s for dual channels)
SDS8102 2GS/s
(1GS/s for dual channels)
Acquisition Sample rate
(real time)
SDS8202 2GS/s
(1GS/s for dual channels)
Input coupling DC, AC , Ground
Input impedance 1M%±2%, in parallel with 10pF±5pF
Probe attenuation
factor 1X, 10X, 100X, 1000X
Max. input voltage 400V (PK-PK) (DC + AC PK-PK)
Bandwidth limit 20MHz, full bandwidth
Channel –channel
isolation
50Hz: 100 : 1
10MHz: 40 : 1
Input
Time delay between
channel(typical) 150ps
SDS6062 0.5S/s~500MS/s single channel*
0.5S/s~250MS/s dual channel
SDS7102 0.5S/s~1GS/s single channel*
0.5S/s~500MS/s dual channel
SDS8102 0.5S/s~2GS/s single channel*
0.5S/s~1GS/s dual channel
Sampling rate range
SDS8202 0.5S/s~2GS/s single channel*
0.5S/s~1GS/s dual channel
Interpolation (sin x)/x
Record length 10M points on each channel
SDS6062 5ns/div1100s/div,
step by 11215
Horizontal
System
Scanning speed
(S/div)
SDS7102 2ns/div1100s/div,
step by 11215
2

Section 1: General Information
Table 1: Specifications (cont.)
Performance Characteristics Instruction
SDS8102 2ns/div1100s/div,
step by 11215
SDS8202 1ns/div1100s/div,
step by 11215
Sampling rate /
relay time accuracy ±100ppm
Interval( T$)
accuracy
(DC1100MHz)
Single,
±(1 interval time+100ppm×reading+0.6ns);
Average>16,
±(1 interval time +100ppm×reading+0.4ns)
A/D converter 8 bits resolution (2 Channels simultaneously)
Sensitivity 2mV/div~10V/div
SDS6062 #10 div
SDS7102
SDS8102
Displacement
SDS8202
#1V(2mV1100mV)-
#10V(200mV11V)-
#100V(2V110V)
Analog bandwidth 60MHz, 100MHz, 200MHz, 300MHz
Single bandwidth Full bandwidth
Low Frequency #5Hz (at input, AC coupling, -3dB)
SDS6062 "5.8ns (at input, Typical)
SDS7102 "3.5ns (at input, Typical)
SDS8102 "3.5ns (at input, Typical)
Rise time
SDS8202 "1.7ns (at input, Typical)
DC accuracy ±3%
Vertical system
DC accuracy
(average) Average416: ±(3% rdg + 0.05 div) for V$
Measurement Cursor V and T between cursors$ $
3

Section 1: General Information
Table 1: Specifications (cont.)
Performance Characteristics Instruction
Automatic
Vpp, Vmax, Vmin, Vtop, Vbase, Vamp,
Vavg, Vrms, Overshoot, Preshoot, Freq,
Period, Rise Time, Fall Time, Delay A$B ,
DelayA$B , +Width, -Width, +Duty, -Duty
Waveform Math *, +, *, / ,FFT
Waveform storage 15 waveforms
Bandw
idth Full bandwidth
Lissajous
figure Phase
differe
nce
±3 degrees
Frequency ( typical) 1KHz square wave
Communication
port USB2.0, USB for file storage, VGA port or RS-232
Single channel is when only one input channel is working.
4

Section 1: General Information
Table 1: Specifications (cont.)
Trigger:
Performance Characteristics Instruction
Internal ±6 div from the screen center
EXT ±600mV
Trigger level range
EXT/5 ±3V
Internal ±0.3div
EXT ±(40mV + 6% of Set Value)
Trigger level
Accuracy (typical)
EXT/5 ±(200mV +6% of Set Value)
Trigger
displacement According to Record length and time base
Trigger Holdoff
range 100ns~10s
50% level setting
(typical) Input signal frequency #50Hz
slope Rising, Falling
Edge trigger Sensitivity 0.3div
Trigger condition Positive pulse,0, ., /
negative pulse,0, ., /
Pulse trigger
Pulse Width range 24ns110s
Modulation Support standard NTSC, PAL and
SECAM broadcast systems
Video Trigger
Line number range 1-525 (NTSC) and 1-625 (PAL/SECAM)
Trigger condition Positive pulse,0, ., /
negative pulse,0, ., /
Slope Trigger
Time setting 24ns110s
Trigger on CH1 Edge, Pulse, Video, Slope
Alternate Trigger Trigger on CH2 Edge, Pulse, Video, Slope
5

Section 1: General Information
1.4 General Technical Specifications
Table 2: General specifications
Display
Display Type 8” Colored LCD (Liquid Crystal Display)
Display Resolution 800 (Horizontal) × 600 (Vertical) Pixels
Display Colors 65536 colors, TFT screen
Output of the Probe Compensator
Output Voltage
(Typical )
About 5V, with the Peak-to-Peak voltage equal to or
greater than 1M%of load.
Frequency (Typical ) Square wave of 1KHz
Table 2: General Specifications (cont.)
Power
Mains Voltage 1001240 VAC RMS, 50/60Hz, CAT II
Power Consumption < 18W
Fuse 1A, T grade, 250V
Battery (optional) Cell:558792 4000mAh/3.7V
Pack:2s2p 7.4V/8000mAh
Mechanical Specifications
Dimension 340mm× 155mm×70mm (L*H*W)
Weight About 1.82 kilogram
Interval Period of Adjustment:
One year is recommended for the calibration interval period.
6

Section 1: General Information
7
1.5 Declaration of Conformity
SDS Series Smart Digital Storage Oscilloscopes
Manufacturer: Fujian Lilliput Optoelectronics Technology Co., Ltd.
Statement of Conformity
Base on the result using appropriate standards, the product is in conformity with
Electromagnetic Compatibility Directive 2004/108/EC Annex #
Low Voltage Directive: 2006/95/EC
Sample tests
Standards used:
EN61010-1,2001
Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory use-part 1: General Requirements
EN61326-1: 2006
Electrical Equipment for Measurement, Control and Laboratory use-EMC
Requirements-part 1. General Requirements
EN61000-3-2: 2006+A2,2009
Electromagnetic Compatibility (EMC)-part 3: Limits-Section 2: Limits for Harmonic
Current Emissions (Equipment Input Current less than/equal to 16A per phase)
EN61000-3-3,2008
Electromagnetic Compatibility (EMC)-part 3: Limits-Section 3 Limitation of Voltage
Fluctuations and Flicker in Low-Voltage Supply systems for Equipment with Rated
Current less than or equal to 16A
The tests have been performed in typical configuration.
This conformity is indicated by the symbol CE, i.e."Conformite Europeenne".

Section 2: Installation
Section 2: Installation
2.1 Performing the General Inspection
When you have got a new SDS oscilloscope, it is suggested that you should perform a general
inspection on the instrument according to the following steps.
2.1.1 Check whether there is any Damage on it Due to Transportation
If the packing boxes or foam cushions are found in serous damage, keep them in a proper place till
the complete instrument and accessories have passed the electrical and mechanical tests.
2.1.2 Make a Check on Accessories
The accessory list has been described in the picture of Digital Oscilloscope Parts of this manual.
You can make a check and find whether there is any accessory loss with reference to the Appendix.
In case of any accessory loss or damage, consult the OWON dealer responsible for such a business
or the local office of OWON.
2.1.3 Make a Check on the Complete Instrument
If the instrument is damaged in its appearance or it fails in normal operation or performance test,
consult the OWON dealer responsible for such a business or the local office of OWON. If the
instrument is damaged due to transportation, keep the packing in a proper place and consult the
transportation department and the OWON dealer responsible for such business, who will provide
an instrument replacement or maintenance
2.2 Operating Environment
Table 3: Environment
Temperature Working temperature: 0 "140 "
Storage temperature: -20 "160 "
Relative Humidity "90%
Height Operating: 3,000 m
Non-operating: 15,000 m
Cooling Method Natural convection
2.3 Storage and Transport
Do not store or place the instrument in locations where the liquid crystal display (LCD) may be
directly exposed to the sunshine for a long time.
Be careful: Do not make spraying agent, liquid and solvent touch with probes to avoid the
instrument or probe being damaged.
If the oscilloscope is to be stored for a long time, it is required to charge the lithium battery before
storage.
Take and put gently and prevent rain in the process of transportation.
8

Section 2: Installation
2.4 Packaging
Packaging: default packaging.
Other packaging methods:
A) Wraps with pasteboard or thick plastic.
B) With the intensity big packing case. (Made with such as double-decked cartoon paper)
C) Wraps with 70mm - 100mm sacrificially all around the instrument for quakeproof.
D) Place “the danger” on the packaging.
If the box or blister package has been damaged seriously, please keep it until the instrument and
all the accessories are passed your test.
2.5 Tagging for Service
The tagging is the certificate for the customer to require servicing. So please do not arbitrary tears
and modifies it.
2.6 Power Supply Requirement
Use only the power cord specified for this product and certified for the country of use. Make sure
that the product is properly be grounded.
2.7 Cleaning Requirements
Cleaning
Inspect the instrument and probes as often as operating conditions require.
To clean the instrument exterior, perform the following steps:
1. Wipe the dust from the instrument and probe surface with a soft cloth. Do not
make any scuffing on the transparent LCD protection screen when clean the
LCD screen.
2. Clean the instrument with a wet soft cloth not dripping water, during the
period of which please pay attention to the disconnection of power. It is
recommended to scrub with soft detergent or fresh water. To avoid damage
to the instrument or probe, do not use any corrosive chemical cleaning agent.
Warning: Before power on again for operation, it is required to confirm that
the instrument has already been dried completely, avoiding any
electrical short circuit or bodily injury resulting form the moisture.
9

Section 3: Test and Calibration
Section 3: Test and Calibration
3.1 Equipment for Testing
Oscilloscope calibrator, signal generator, oscilloscope, LCR digital electric bridge, multi meter
calibrator
3.2 Test Standard
Q/ZLLD03-2005 enterprise standard and technical specification of SDS oscilloscopes by Fujian
Lilliput Optoelectronics Technology Co., Ltd
3.3 Inspection Items and Methods
3.3.1 Appearance and functional inspection
A. Appearance inspection
The appearance of the oscilloscope should be clean without obvious row a scar and deformation.
The juncture of the front cover and the back cover should be matched, seamless. The screws are
all fixed without loose. And the keyboards are flexible and light when pressing.
B. Functional inspection
First, power up the oscilloscope and come into measurement. Second, check all the keys and input
1KHz calibrating signals then press “Autoset”, the oscilloscope should display waveforms and
work for measurement. Third, switch to the multi meter to check whether it could work normally.
3.3.2 Sweep rate and error inspection
A. As shown by Figure 2 connected, the CH1 set as follows:
Coupling: DC Channel: On Probe: 1X Invert: Off
Tested oscilloscope
Oscilloscope calibration
Output time scale
CH1-BNC
Q"connection
10

Section 3: Test and Calibration
Figure 1: Connection of sweep rate and error inspection
B. Make the time scale of the oscilloscope calibrating in line with sweep rate (time division) and
adjust the trigger level to display stable waveforms. And press “T ERROR”, turn fine-tuning knob
to make the time scale superpose with the level of calibration line( as figure 2),the error is the
error value of sweep rate.( S03A calibration is pointer header that the indicated value is the
correction to the error of sweep rate and the error should be anti-symbol.)
Figure 2: Waveform of sweep rate and error inspection
C. Repeat step B and test sweep rate for other channels.
3.3.3 Time measurement and error inspection
A. As shown by Figure 1 connected
B. Set the output time period of the calibration as A, press “Autoset” to display the stable
waveform. Then, also set the measured window 1 as the period of CH 1; get the period value B to
gain the time error C as follows:
C=(B+A)%A$100%
3.3.4 Voltage division and error inspection
A. As shown by Figure 3 connected, CH 1 set as follows:
Coupling: DC Channel: On Probe: 1X Invert: Off
11

Section 3: Test and Calibration
Tested oscilloscope
Oscilloscope calibration
Output square scale
CH1-BNC
Q"connection
Figure 3: Connection of voltage division and error inspection
B. Make the calibration to output the impulse 1KHz and change base output amplitude and voltage
scaling factor, the height of the waveform displayed takes 80% of the checked work spare in the
oscilloscope screen (usually 6 grids). Pressing “V ERROR” and adjust the fine-tuning knob until
the upper and lower base line and horizontal scale full of coincidence, the error displayed on the
calibration is the error of the voltage division. (S03A oscilloscope is pointer header that the
indicated value is the correct value of the error of sweep rate, base error is anti-symbol.)
C. Repeat step B and test voltage division for each channel.
3.3.5 Voltage measurement and error inspection
A. As shown by figure 3.connected:
B: Make the calibration to output amplitude A of square wave 1 KHz, press “Autoset” and adjust
to display the stable waveforms. Set the measured window 1 as the peak-peak value of Channel 1
and read the period value B, then get the voltage measurement error C as follows:
C=(B+A)%A$100%
C. Repeat step B and check voltage measurement error for every channel.
3.3.6 Bandwidth inspection
A. As shown by Figure 4 connected:
Tested oscilloscope
Signal generator
Output sine wave
CH1-BNC
Q"connection
Figure 4: Connection of voltage measurement and error inspection
B. Regulate the signal generator to output continuous sine wave, adjust output voltage and
12