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SDS Series
Smart Digital Storage Oscilloscopes
User Manual
WWW.OWON.COM.CN
June. 2011 edition
Copy Right in this Manual © Lilliput Company. All rights have been reserved.
The Lilliput’s products are under the protection of the patent rights in America and other countries, including ones which have already obtained the patent rights and those which are applying for. The information in this manual will replace all that in the materials published originally.
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 notice.
OWON is the registered trademark of the Lilliput Company.
Xiamen Lilliput Technology Co.,Ltd.: the 5th floor, B Area, Chuangxin Mansion, Software Park,
ZhenZhuWan, Huandao RD, Xiamen, Fujian, China
Tel: +86-592-2575666 Fax: +86-592-2575669
Web: www.owon.com.cn Mail: [email protected]
Fujian Lilliput Optoelectronics Technology Co., Ltd.: The mansion of optoelectronics hengsan road,
Lantian industrial zone, Zhangzhou, Fujian, China
Tel: +86-596-2130430 Fax: +86-596-2109272
Web: www.owonchina.com Mail: [email protected]
General Warranty
The Lilliput warrants that the product will be free from defects in materials and workmanship for a period of three years from the date of purchase of the product by the original purchaser from the Lilliput Company. And the warranty period of accessories such as probe, battery, adapter is one year. This warranty only applies to the original purchaser and is not transferable to the third party. If the product proves defective during the warranty period, Lilliput either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Parts, modules and replacement products used by Lilliput for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Lilliput.
In order to obtain service under this warranty, Customer must notify Lilliput of the defect before the expiration of the warranty period. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Lilliput, and with a copy of customer proof of purchase.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Lilliput shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Lilliput 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 non-Lilliput 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 Lilliput’s Sales and Service Offices for services or a complete copy of the warranty statement.
Excepting the after-sales services provided in this summary or the applicable warranty statements, Lilliput 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. Lilliput should not take any responsibilities for any indirect, special or consequent damages.
Table of Contents
Application of VERTICAL POSITION and VOLTS/DIV Knobs........................................ 31
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1. General Safety Requirements
1. General Safety Requirements
Before any operations, please read the following safety precautions to avoid any possible bodily injury and prevent this product or any other products connected from damage. In order to avoid any contingent danger, this product is only used within the range specified.
Only the qualified technicians can implement the maintenance.
Prevent the Fire or Bodily Injury.
Connect the probe correctly. The grounding end of the probe corresponds to the
grounding phase. Please don't connect the grounding end to the positive phase.
Use Proper Power Line. Only use the power cord specially provided for this product and that has been approved to be used in this user state.
Connect or Disconnect Correctly. When the probe or testing wire is connected to the power lead, please do not connect and disconnect the probe or testing wire at random.
Product Grounded. This product is grounded through the power lead grounding conductor. In order to prevent any electric shock, the grounding conductor must be connected to the ground. It requires guarantee that this product has been already grounded correctly before any connection with its input or output terminal.
When powered by AC power, it is not allowed to measure AC power source directly, because the testing ground and power cord ground conductor are connected together, otherwise, it will cause short circuit.
When powered by battery, the product must ground connection. To avoid electric shock, there must be a ground wire connect between ground and the ground port (on the back of product panel).
Pay attention to the nominal values of all terminals. In order to prevent any fire or electric shock risks, please pay attention to all the nominal values and marks of this product. Before implement any connections for this product, please read the user's manual of this product to understand the information about the rated values further.
Do not make any operations without the instrument cover installed. If the cover or panel has already been removed, please don't operate this product.
Use Proper Fuse. Only the fuse complying with the specified type and nominal value for this product can be used.
Avoid touching any exposed circuit. When the product is on power, please don't touch the uncovered contacts and parts.
Please don't make any operations while there is an uncertain fault emerged. If suspecting damage to this product, please contact the qualified maintenance personnel for check.
Keep a good ventilation condition. Please consult the detailed installation instruction in the user's manual so that this product can be erected correctly, keeping it under a good ventilation condition.
Please do not make any operations in a moist environment.
Please do not make any operates in an explosive environment.
Keep the products surface clean and dry.
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2. Safety Terms and Symbols
2. Safety Terms and Symbols
Safety Terms
Terms in this manual. The following terms may appear in this manual:
Warning: A warning statement indicates the conditions and actions which may endanger the life safety.
Note: A note statement indicates the conditions and actions which may cause damage to this product or other property.
Terms on the product. The following terms may appear on this product:
Danger: It indicates that there may be an immediate injury to you when you encounter this mark.
Warning: It indicates that there may not be an immediate injury to you when you encounter this mark.
Note: It indicates that there may be damage to this product or other property.
Safety Symbols
Symbols on the product. The following symbol may appear on the products:
High Voltage Please Consult the Manual
Earth End on the Shell Protective Ground End
Grounding End for Measurement
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2. Safety Terms and Symbols
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 an oscilloscope input is connected to more than 42V peak (30Vrms) or on circuits of more than 4800VA, please take note of below items:
z Only use accessory insulated voltage probes or test lead. z Before using oscilloscope, please inspect oscilloscope accessories
such as probe to see if they are in good condition, if not, please replace them.
z Remove probes, test leads and other accessories that are not
necessary use.
z Remove USB cable which connects oscilloscope and computer. z Please pay special attention when the probe is set as 1:1 and do
not apply input voltages above the rating of the instrument because the probe tip voltage will directly transmit to the oscilloscope.
z Do not use exposed metal BNC or banana plug connectors. z Do not insert metal objects into connectors.
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3. General Characteristics
3. General Characteristics
¾ Bandwidth: 60MHz — 300 MHz;
¾ Sample rate(real time): 500MS/s — 3.2GS/s;
¾ Dual channel, 10M points on each channel for the Record length;
¾ Autoscale function;
¾ 7cm smart design body;
¾ 8 inch high definition TFT display (800 x 600 pixels);
¾ Built-in FFT function;
¾ Pass/Fail Function, optically isolated Pass/Fail output;
¾ Waveform record and playback;
¾ VGA output;
¾ Various triggering function;
¾ USB communication ports;
¾ Super capacity lithium battery (Optional);
¾ Built-in Chinese and English help system;
¾ Multiple language user interfaces.
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4. Junior User Guidebook
4. Junior User Guidebook
This chapter deals with the following topics mainly:
z Introduction to the structure of the oscilloscope z Introduction to the user interface z How to implement the general inspection z How to implement the function inspection z How to make a probe compensation z How to set the probe attenuation coefficient z How to use the probe safely z How to implement an auto-calibration z Introduction to the vertical system z Introduction to the horizontal system z Introduction to the trigger system
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Introduction to the Structure of the Oscilloscope
When you get a new-type oscilloscope, you should get acquainted with its front panel at first and the SDS series digital storage oscilloscope is no exception. This chapter makes a simple description of the operation and function of the front panel of the SDS series oscilloscope, enabling you to be familiar with the use of the SDS series oscilloscope in the shortest time.
Front panel
The SDS series oscilloscope offers a simple front panel with distinct functions to users for their completing some basic operations, in which the knobs and function pushbuttons are included. The knobs have the functions similar to other oscilloscopes. The 5 buttons (F1 ~
F5) in the column on the right side of the display screen or in the row under the display screen (H1 ~ H5) are menu selection buttons, through which, you can set the different options for the current menu. The other pushbuttons are function buttons, through which, you can enter different function menus or obtain a specific function application directly.
Fig. 4-1 Front panel
1. Power on/off
2. Display area
3. Power indication light
Green light: Indicating DSO connects with AC Power, and the battery is in full (if there is battery inside DSO).
Yellow light: Indicating DSO connect with AC Power and the battery is in charging
(if there is battery inside DSO)
Dim: Only powered by battery without connecting AC Power
4. Control (key and knob) area
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5. Probe Compensation: Measurement signal(5V/1KHz) output
6. EXT Trigger Input
7. Signal Input Channel
8. Menu off
Left side panel
Fig. 4-2 Left side panel
1. Power switch:“―” represents power ON; “○” represents power OFF.
2. AC power input jack
Right side panel
Fig. 4-3 Right side panel
1. USB Host port: It is used to transfer data when external USB equipment connects to the oscilloscope regarded as “Host equipment”.
For example: upgrading software by
USB flash disk needs to use this port.
2. USB Device port: It is used to transfer data when external USB equipment connects to the oscilloscope regarded as “Device equipment”. For example: to use this port when connect PC to the oscilloscope by USB.
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3. COM / VGA port: To connect the oscilloscope with external equipment as serial port, or to connect the oscilloscope with a monitor or a projector as VGA output.
4. LAN (function reserved)
Rear Panel
Fig. 4-4 Rear Panel
1. The port of trigger signal output & Pass/Fail output
2. Handle
3. Air vents
4. Foot stool (can adjust the tilt angle of the oscilloscope)
5. Ground connection
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Control (key and knob) area
Fig. 4-5 Keys Overview
1. Menu option setting: H1~H5
2. Menu option setting: F1~F5
3. Menu off：turn off the menu
4. M knob(Multipurpose knob)
5. Function key area: Total 12 keys
6. Vertical control area with 3 keys and 4 knobs.
“CH1 MENU” and “CH2 MENU” correspond to setting menu in CH1 and CH2,
“Math” key refer to math menu, the math menu consists of six kinds of operations, including CH1-CH2, CH2-CH1, CH1+CH2, CH1*CH2, CH1/CH2 and FFT. Two
“VERTICAL POSITION” knob control the vertical position of CH1/CH2, and two
“VOLTS/DIV” knob control voltage scale of CH1, CH2.
7. Horizontal control area with 1 key and 2 knobs.
“HORIZONTAL POSITION” knob control trigger position, “SEC/DIV” control time base, “HORIZ MENU” key refer to horizontal system setting menu.
8. Trigger control area with 3 keys and 1 knob.
“TRIG LEVEL” knob is to adjust trigger voltage. Other 3 keys refer to trigger system setting.
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User interface introduction
Fig. 4-6 Illustrative Drawing of Display Interfaces
1. Waveform Viewing Area.
2. The Trigger State indicates the following information:
Auto: The oscilloscope is under the Automatic mode and is collecting the waveform under the non-trigger state.
Trig: The oscilloscope has already detected a trigger signal and is collecting the after-triggering information.
Ready: All pre-triggered data have been captured and the oscilloscope has been already ready for accepting a trigger.
Scan: The oscilloscope captures and displays the waveform data continuously in the scan mode.
Stop: The oscilloscope has already stopped the waveform data acquisition.
3. The purple pointer indicates the horizontal trigger position, which can be adjusted by the horizontal position control knob.
4. The pointer indicates the trigger position in the internal memory.
5. The two yellow dotted lines indicate the size of the viewing expanded window.
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6. It shows present triggering value and displays the site of present window in internal memory.
7. It shows setting time (see “Config” on P54 ).
8. It indicates that there is a U disk connecting with the oscilloscope.
9. Indicating battery power status (see “Display” on P55 ).
10. The red pointer shows the trigger level position for CH1.
11. The waveform of CH1.
12. The positions of two purple dotted line cursors measurements.
13. The yellow pointer shows the trigger level position for CH2.
14. The waveform of CH2.
15. The frequency of the trigger signal of CH1.
16. The frequency of the trigger signal of CH2.
17. It indicates the current function menu.
18/19. It shows the selected trigger type:
Rising triggering
Falling triggering
Video line synchronous triggering
Video field synchronous triggering
The reading shows the trigger level value of the corresponding channel.
20. The reading shows the window time base value.
21. The reading shows the setting of main time base.
22. The readings show current sample rate and the record length.
23. It indicates the measured type and value of the corresponding channel. “F” means frequency, “T” means cycle, “V” means the average value, “Vp” the peak-peak value, “Vk” the root-mean-square value, “Ma” the maximum amplitude value,
“Mi” the minimum amplitude value, “Vt” the Voltage value of the waveform’s flat top value, “Vb” the Voltage value of the waveform’s flat base, “Va” the amplitude value, “Os” the overshoot value, “Ps” the Preshoot value, “RT” the rise time value, “FT” the fall time value, “PW” the +width value, “NW” the -Width value, “+D” the +Duty value, “-D” the -Duty value, “PD” the Delay A B value and “ND” the Delay A B value.
24. The readings indicate the corresponding Voltage Division and the Zero Point positions of the channels.
The icon shows the coupling mode of the channel.
“—” indicates the direct current coupling
“ ～” indicates the AC coupling
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” i ndicates GND coupling
25. It is cursor measure window, showing the absolute values and the readings of the two cursors.
26. The yellow pointer shows the grounding datum point (zero point position) of the waveform of the CH2 channel. If the pointer is not displayed, it shows that this channel is not opened.
27. The red pointer indicates the grounding datum point (zero point position) of the waveform of the CH1 channel. If the pointer is not displayed, it shows that the channel is not opened.
Note:
If a
○ current menu.
How to implement the General Inspection
After you get a new SDS series oscilloscope, it is recommended that you should make a check on the instrument according to the following steps:
1. Check whether there is any damage caused by transportation.
If it is found that the packaging carton or the foamed plastic protection cushion has suffered serious damage, do not throw it away first till the complete device and its accessories succeed in the electrical and mechanical property tests.
The supplied accessories have been already described in the Appendix B
“Accessories” of this Manual. You can check whether there is any loss of accessories with reference to this description. If it is found that there is any accessory lost or damaged, please get in touch with the distributor of Lilliput responsible for this service or the Lilliput’s local offices.
3. Check the Complete Instrument
If it is found that there is damage to the appearance of the instrument, or the instrument can not work normally, or fails in the performance test, please get in touch with the Lilliput’s distributor responsible for this business or the Lilliput’s local offices. If there is damage to the instrument caused by the transportation, please keep the package. With the transportation department or the Lilliput’s distributor responsible for this business informed about it, a repairing or replacement of the instrument will be arranged by the Lilliput.
How to implement the Function Inspection
Make a fast function check to verify the normal operation of the instrument, according
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4. Junior User Guidebook to the following steps:
1. Connect the power cord to a power source. Turn on the Power Switch
Button ― ○ on the left side (make sure the “―” side is pressed down). Then,
push down the button of the “ ” signal on the top.
The instrument carries out all self-check items and shows the Boot Logo. Press the
“Utility” button, then, press H1 button to get access to the “Function” menu. Turn the M knob to select Adjust and press H3 button to select “Default”. The default attenuation coefficient set value of the probe in the menu is 10X.
2. Set the Switch in the Oscilloscope Probe as 10X and Connect the Oscilloscope with CH1 Channel.
Align the slot in the probe with the plug in the CH1 connector BNC, and then tighten the probe with rotating it to the right side.
Connect the probe tip and the ground clamp to the connector of the probe compensator.
3. Press the “Autoset” Button.
The square wave of 1 KHz frequency and 5V peak-peak value will be displayed in several seconds (see Fig. 4-7).
Fig.4-7 Auto set
Check CH2 by repeating Step 2 and Step 3.
How to Implement the Probe Compensation
When connect the probe with any input channel for the first time, make this
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4. Junior User Guidebook adjustment to match the probe with the input channel. The probe which is not compensated or presents a compensation deviation will result in the measuring error or mistake. For adjusting the probe compensation, please carry out the following steps:
1. Set the attenuation coefficient of the probe in the menu as 10X and that of the
hook tip is used, ensure that it keeps in close touch with the probe. Connect the probe tip with the signal connector of the probe compensator and connect the reference wire clamp with the ground wire connector of the probe connector, and then press the button “Autoset”.
2. Check the displayed waveforms and regulate the probe till a correct compensation is achieved (see Fig.4-8 and Fig.4-9).
Overcompensated Compensated correctly Under compensated
Fig. 4-8 Displayed Waveforms of the Probe Compensation
3. Repeat the steps mentioned if necessary.
Fig. 4-9 Adjust Probe
How to Set the Probe Attenuation Coefficient
The probe has several attenuation coefficients, which will influence the vertical scale factor of the oscilloscope.
To change or check the prob e attenuation coefficient in the menu of oscilloscope:
(1) Press the function menu button of the used channels (CH1 MENU or C
H2
MENU).
(2) Press H3 bu tton to display the Probe menu; select the proper value corresponding to the probe.
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This setting will be valid all the time before it is changed again.
Note: The attenuation coefficient of the probe in the menu is preset to 10X when the oscilloscope is delivered from the factory.
Make sure that the set value of the attenuation switch in the probe is the same as the menu selection of the probe attenuation coefficient in the oscilloscope.
The set values of the probe switch are 1X and 10X (see Fig. 4-10).
Fig.4-10 Attenuation Switch
Note: When the a ttenuation switch is set to 1X , the probe will limit the bandwidth of the oscilloscope in 5MHz. If it is needed to use the full bandwidth of the oscilloscope, the switch must be set to 10X.
How to Use the Probe Safely
The safety guard ring around the probe body protects your finger against the electric shock, shown as Fig. 4-11.
Fig. 4-11 Finger Guard
Warning:
In order t o avoid suffering from the electric shock, please keep your finger behind the safety guard ring of the probe body during the operation.
In order to protect you from suffering from the electric shock duri ng your using the probe, do not touch the metal part of the probe tip when the probe is connected to the power supply.
Before making any measureme nts, please connect the probe to the instrument and connect the ground terminal to the earth.
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How to Implement Auto-calibration
The auto-calibration application can make the oscilloscope reach the optimum condition rapidly to obtain the most accurate measurement value. You can carry out this application program at any time, but when the range of variation of the ambient temperature is up to or over 5 , this program must be executed.
For the performing of the self-calibration, all probes or wires should be disconnected with the input connector first. Press the “Utility” button, then, press H1 button to call out the Function menu; turn the M knob to choose Adjust. Press H2 button to choose the option “Self Cal”; run the program after everything is ready.
Introduction to the Vertical System
Shown as Fig.4-9, there are a series of buttons and knobs in VERTICAL
CONTROLS. The following practices will gradually direct you to be familiar with the using of the vertical setting.
Fig. 4-12 Vertical Control Zone
1. Use the button “VERTICAL POSITION” knob to show the signal in the center of the waveform window. The “VERTICAL POSITION” knob functions the regulating of the vertical display position of the signal. Thus, when the
“VERTICAL POSITION” knob is rotated, the pointer of the earth datum point of the channel is directed to move up and down following the waveform.
Measuring Skill
If the channel is under the DC coupling mode, you can rapidly measure the DC component of the signal through the observation of the difference between the wave form and the signal ground.
If the channel is under the AC mode, the DC component will be removed by filtration.
This mode helps you display the AC component of the signal with a higher
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4. Junior User Guidebook sensitivity.
Vertical offset back to 0 shortcut key
Turn the VERTICAL POSITION knob to change the vertical display position of channel and press the position knob to set the vertical display position back to 0 as a shortcut key, this is especially helpful when the trace position is far out of the screen and want it to get back to the screen center immediately.
2. Change the Vertical Setting and Observe the Consequent State Information
Change.
With the information displayed in the status bar at the bottom of the waveform window, you can determine any changes in the channel vertical scale factor. z Turn the vertical “VOLTS/DIV” knob and change the “Vertical Scale Factor
(Voltage Division)”, it can be found that the scale factor of the channel corresponding to the status bar has been changed accordingly. z Press buttons of “CH1 MENU”, “CH2 MENU” and “Math”, the operation menu, symbols, waveforms and scale factor status information of the corresponding channel will be displayed in the screen.
Introduction to the Horizontal System
Shown as Fig.4-10, there are a button and two knobs in the “HORIZONTAL
CONTROLS”. The following practices will gradually direct you to be familiar with the setting of horizontal time base.
Fig. 4-13 Horizontal Control Zone
1. Use the horizontal “SEC/DIV” knob to change the horizontal time base setting and observe the consequent status information change. Rotate the horizontal
“SEC/DIV” knob to change the horizontal time base, and it can be found that the
“Horizontal Time Base” display in the status bar changes accordingly.
2. Use the “HORIZONTAL POSITION” knob to adjust the horizontal position of
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4. Junior User Guidebook the signal in the waveform window. The “HORIZONTAL POSITION” knob is used to control the triggering displacement of the signal or for other special applications. If it is applied to triggering the displacement, it can be observed that the waveform moves horizontally with the knob when you rotate the
“HORIZONTAL POSITION” knob.
Triggering displacement back to 0 shortcut key
Turn the HORIZONTAL POSITION knob to change the horizontal position of channel and press the HORIZONTAL POSITION knob to set the triggering displacement
back to 0 as a shortcut key.
3. With the “HORIZ MENU” button, you can do the Window Setting and the
Window Expansion.
Introduction to the Trigger System
Shown as Fig.4-11, there are a knob and three buttons in the “TRIGGER
CONTROLS”. The following practices will direct you to be familiar with the setting of the trigger system gradually.
Fig.4-14 Trigger Control Zone
1. Press the “Trigger Menu” button and call out the trigger menu. With the operations of the menu selection buttons, the trigger setting can be changed.
2. Use the “TRIG LEVEL” knob to change the trigger level setting.
With the rotation of the “TRIG LEVEL” knob, it can found that the trigger indicator in the screen will move up and down with the rotation of the knob. With the movement of the trigger indicator, it can be observed that the trigger level value displayed in the screen changes.
PS: Turning the TRIG LEVEL knob can change trigger level value and it is also the hotkey to set trigger level back to 0.
3. Press the button “50%” to set the trigger level as the vertical mid point values of the amplitude of the trigger signal.
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4. Press the “Force” button to force a trigger signal, which is mainly applied to the
“Normal” and “Single” trigger modes.
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5. Advanced User Guidebook
5. Advanced User Guidebook
Up till now, you have already been familiar with the initial operations of the functions of the function areas, buttons and knobs in the front panel of the SDS series oscilloscope. Based the introduction of the previous Chapter, the user should have an intimate knowledge of the determination of the change of the oscilloscope setting through observing the status bar. If you have not been familiar with the above-mentioned operations and methods yet, we advise you to read the section of “Chapter One Junior
Users' Guidebook”.
This chapter will deal with the following topics mainly: z How to Set the Vertical System z How to Set the Horizontal System z How to Set the Trigger System z How to Implement the Sampling Setup z How to Set the Display System z How to Save and Recall Waveform z How to Record/Playback Waveforms z How to Implement the Auxiliary System Function Setting z How to Implement the Automatic Measurement z How to Implement the Cursor Measurement z How to Use Autoscale function z How to Use Executive Buttons
It is recommended that you read this chapter carefully to get acquainted the various measurement functions and other operation methods of the SDS series oscilloscope.
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How to Set the Vertical System
The VERTICAL CONTROLS includes three menu buttons such as CH1 MENU,
CH2 MENU and Math, and four knobs such as VERTICAL POSITION,
VOLTS/DIV (one group for each of the two channels).
Setting of CH1 and CH2
Every channel has an independent vertical menu and each item is set respectively based on the channel.
To turn waveforms on or off (channel, math)
Pressing the CH1 MENU, CH2 MENU, and Math buttons have the following effect:
• If the waveform is off, the waveform is turned on and its menu is displayed.
• If the waveform is on and its menu is not displayed, its menu will be displayed.
• If the waveform is on and its menu is displayed, the waveform is turned off and its menu goes away.
CH1 menu
CH2 menu
Fig. 5-1 Channel Setting Menu
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The description of the Channel Menu is shown as the following list:
Function Menu Setting Description
DC Unblock the AC and DC components in the input signal.
Coupling
Inverted
AC
GROUND
OFF
ON
Block the DC component in the input signal.
The Input signal is interrupted.
The waveform is displayed normally.
Initiate the waveform inverted function.
Probe
Limit
1X
10X
100X
1000X full band
20M
Choose one according to the probe attenuation factor to make the vertical scale reading accurate.
Get full bandwidth.
Limit the channel bandwidth to 20MHz to reduce display noise.
1. Setting Channel Coupling
Taking the Channel 1 for example, the measured signal is a square wave signal containing the direct current bias. The operation steps are shown as below:
(1)
Press the CH1 MENU button and call out the CH1 SETUP menu.
(2)
Press the H1 button, the Coupling menu will display at the screen.
(3)
Press the F1 button to select the Coupling item as “DC”. By setting the channel coupling as DC mode, both DC and AC components of the signal will be passed.
(4)
Then, press F2 button to select the Coupling item as “AC”. By setting the channel coupling as AC mode, the direct current component of the signal will be blocked. The waveforms are shown as Fig.5-2.
Fig. 5-2 AC Coupling Oscillogram
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2. Regulate the probe attenuation.
In order to match the attenuation coefficient of the probe, it is required to adjust the attenuation ration coefficient of the probe through the operating menu of the
Channel accordingly (see “How to Set the Probe Attenuation Coefficient” on
P14). If the attenuation coefficient of the probe is 1:1, that of the oscilloscope
input channel should also be set to X1 to avoid any errors presented in the displayed scale factor information and the measured data.
Take the Channel 1 as an example, the attenuation coefficient of the probe is 10:1, the operation steps is shown as follows:
(1)
Press the CH1 MENU button, access CH1 SETUP menu.
(2)
Press the H3 menu selection, the Probe menu will display at the right of the screen, then press the F2 button to select X10 for the probe.
The Fig.5-3 illustrates the setting and the vertical scale factor when the probe of the attenuation coefficient of 10:1.is used.
Fig. 5-3 Regulation of the Attenuation Ratio of the Probe
A List of the Attenuation Coefficient of Probes and the Corresponding Menu Settings:
Attenuation Coefficient of the Probe Corresponding Menu Setting
1:1 X1
10:1 X10
100:1 X100
1000:1 X1000
3. Setting of Waveform Inverted
Waveform inverted: the displayed signal is turned 180 degrees against the phase of the earth potential.
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Taking the Channel 1 for example, the operation steps are shown as follows:
(1)
Press the CH1 MENU button and get access to the CH1 SETUP menu.
(2)
Press the H2 menu selection button and select ON for Inverted item. The waveform inverted function is initiated.
(3)
Press the H2 menu selection button again and select OFF for Inverted item.
The function of waveform inverted is closed off.
For the screen display, see Fig. 5-4 and Fig. 5-5
Fig. 5-4 Waveform not inverted
Fig. 5-5 Waveform Inverted
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4. Setting of Band Limit
When high frequency components of a waveform are not important to its analysis, the bandwidth limit control can be used to reject frequencies above 20 MHz.
Taking the Channel 1 for example, the operation steps are shown as below:
(1)
Press the CH1 MENU button to call out the CH1 SETUP menu.
(2)
Press the H4 button and the Limit menu will display.
(3)
Press the F1 button to select the Band Limit as full band. The high frequency of the signal will be allowed to pass.
(4)
Press the F2 button to select the Band Limit as 20M.The bandwidth is limited to 20MHz.The frequencies above 20 MHz will be rejected.
Implementation of Mathematical Manipulation Function
The Mathematical Manipulation function is used to show the results of the addition, multiplication, division and subtraction operations between Channel 1 and Channel 2, and the FFT operation of Channel 1 or Channel 2.
Fig. 5-6 Wave math menu
The corresponding FCL (Functional Capabilities List) of the Waveform Calculation
Function Menu
Factor1
Setting
CH1
CH2
Description
Select the signal source of the factor1
Dual Wfm
Math
Sign + - * / Select the sign of mathematical manipulation
FFT
Factor 2
Source
CH1
CH2
CH1
Select the signal source of the factor2
Select CH1 as FFT source.
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Window
Format
Zoom
5. Advanced User Guidebook
CH2 Select CH2 as FFT source.
Rectangle
Blackman
Hanning
Hamming dB
Vrms
× 1
×
2
×
5
× 10
Select window for FFT.
Select dB for Format.
Select Vrms for Format.
Set multiple ×1.
Set multiple ×2.
Set multiple ×5.
Set multiple ×10.
Taking the additive operation between Channel 1 and Channels 2 for example, the operation steps are as follows:
1. Press the Math button and call out the Wfm Math menu.
2. Press the H1 button and call out the Dual Wfm Math menu. The menu will display at the left of the screen.
3. Press the F1 menu selection button and choose CH1 for Factor1.
4. Press the F2 menu selection button and choose +.
5. Press the F3 menu selection button and choose CH2 for Factor2. The green calculated waveform M is displayed in the screen.
Fig. 5-7 Waveform resulted from CH1 +CH2 Mathematical Manipulation
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Using FFT function
5. Advanced User Guidebook
An FFT breaks down signals into component frequencies, which the oscilloscope uses to display a graph of the frequency domain of a signal, as opposed to the oscilloscope’s standard time domain graph. You can match these frequencies with known system frequencies, such as system clocks, oscillators, or power supplies.
FFT in this oscilloscope can transform 2048 points of the time-domain signal into its frequency components and the final frequency contains 1024 points ranging from 0Hz to
Nyquist frequency.
Taking the FFT operation for example, the operation steps are as follows:
1. Press the Math button and call out the Math menu.
2. Press the H2 button and call out the FFT menu.
3. Press the F1 button to choose CH1 as the source.
4. Press F2 button, the windows item will display at the left of the screen, turn the M knob to select Window, including Rectangle, Hamming, Hanning and Blackman.
5. Press F3 button to choose the Format, including dB, Vrms.
6. Press F4 button, the zoom window will display at the left of the screen, turn the M knob to zoom in or out the wave of the multiple including ×1, ×2, ×5, ×10.
Selecting the FFT Window
■ The FFT feature provides four windows. Each one is a trade-off between frequency resolution and magnitude accuracy. What you want to measure and your source signal characteristics help you to determine which window to use. Use the following guidelines to select the best window.
Rectangle
Hamming
This is the best type of window for resolving frequencies that are very close to the same value but worst for accurately measuring the amplitude of those frequencies. It is the best type for measuring the frequency spectrum of nonrepetitive signals and measuring frequency components near DC.
Use rectangle for measuring transients or bursts where the signal level before and after the event are nearly equal. Also, use this window for equal-amplitude sine waves with frequencies that are very close and for broadband random noise with a relatively slow varying spectrum.
This is a very good window for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy over the rectangle window. It has a slightly better frequency resolution than the Hanning.
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Hanning
5. Advanced User Guidebook
Use Hamming for measuring sine, periodic and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different.
This is a very good window for measuring amplitude accuracy but less so for resolving frequencies.
Use Hanning for measuring sine, periodic and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different.
Blackman
This is the best window for measuring the amplitude of frequencies but worst at resolving frequencies.
Use Blackman-Harris for measuring predominantly single frequency waveforms to look for higher order harmonics.
Fig.5-8, 5-9, 5-10, 5-11 show four kinds of window function referring to sine wave of
1KHz:
Fig.5-8. Blackman window
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5. Advanced User Guidebook
Fig.5-9 Hamming window
Fig.5-10. Rectangle window
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5. Advanced User Guidebook
Fig.5-11 Hanning window
Quick Tips
If desired, use the zoom feature to magnify the FFT waveform.
Use the default dB scale to see a detailed view of multiple frequencies, even if they have very different amplitudes. Use the Vrms scale to see an overall view of how all frequencies compare to each other.
Signals that have a DC component or offset can cause incorrect FFT waveform component magnitude values. To minimize the DC component, choose AC Coupling on the source signal.
To reduce random noise and aliased components in repetitive or single-shot events, set the oscilloscope acquisition mode to average.
Term interpretation
Nyquist frequency: The highest frequency that any Real Time Digital Oscilloscope can measure is exactly half of the sampling rate under the condition of no mistakes, which is called Nyquist frequency. If under-sampling occurs when the frequency sampled is higher than Nyquist frequency, “False Wave” phenomenon will appear. So pay more attention to the relation between the frequency being sampled and measured.
Note：
In FFT mode, the following settings are prohibited:
1) Window set;
2) XY Format in Display SET;
3) “SET 50%” (the triggering level at the vertical point of signal amplitude) in Trigger setting;
4)
Measure.
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5. Advanced User Guidebook
Application of VERTICAL POSITION and VOLTS/DIV Knobs
1. The VERTIVAL POSITION knob is used to adjust the vertical positions of the waveforms of all Channels (including those resulted from the mathematical operation).
The analytic resolution of this control knob changes with the vertical division.
2. The VOLTS/DIV knob is used to regulate the vertical resolution of the wave forms of all channels (including those obtained from the mathematical manipulation), which can determine the sensitivity of the vertical division with the sequence of 1-2-5. The vertical sensitivity goes up when the knob is rotated clockwise and goes down when the knob is rotated anticlockwise.
3. When the vertical position of the channel waveform is adjusted, the screen shows the information concerning the vertical position at the lower left corner (see
Fig.5-12).
Fig. 5-12 Information about Vertical Position
How to Set the Horizontal System
The HORIZONTAL CONTROLS includes the HORIZ MENU button and such knobs as HORIZONTAL POSITION and SEC/DIV.
1. HORIZONTAL POSITION knob: this knob is used to adjust the horizontal positions of all channels (include those obtained from the mathematical manipulation), the analytic resolution of which changes with the time base.
2. SEC/DIV knob: it is used to set the horizontal scale factor for setting the main
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5. Advanced User Guidebook time base or the window.
3. HORIZ MENU button: with this button pushed down, the screen shows the operating menu (see Fig. 5-13).
Fig. 5-13 Time Base Mode Menu
The description of the Horizontal Menu is as follows:
Function Menu
Main (Main Time Base)
Set (Set Window)
Zoom (Zoom Window)
Description
The setting of the horizontal main time base is used to display the waveform.
A window area is defined by two cursors. This function is not available at FFT mode.
The defined window area for display is expanded to the full screen.
Main Time Base
Press the H1 menu selection button and choose Main. In this case, the
HORIZONTAL POSITION and SEC/DIV knobs are used to adjust the main window. The display in the screen is shown as Fig.5-14
Fig. 5-14 Main Time Base
Set Window
Press the H2 menu selection button and choose Set. The screen will show a window area defined by two cursors. In this case, the HORIZONTAL POSITION and
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5. Advanced User Guidebook
SEC/DIV knobs can be used to adjust the horizontal position and size of this window area. In FFT mode, Set menu is invalid. See Fig.5-15.
Fig. 5-15 Window Setting
Window Expansion
Press the H3 menu selection button and choose Zoom. As a result, the window area defined by two cursors will be expanded to the full screen size (see Fig. 5-16).
Fig. 5-16 Zoom Window
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5. Advanced User Guidebook
How to set the Trigger System
Trigger is to determine when DSO starts to acquire data and waveform display.
Once trigger to be set correctly then it will convert the unstable display to meaning waveform.
When DSO start to acquire data it will acquire enough data to form waveform on left of trigger point. DSO continues to acquire data when it waits for trigger condition happen. Once it detect out the trigger it will acquire enough data continuously to form the waveform on right of trigger point.
Trigger control area consists of 1 knob and 3 menu keys.
TRIG LEVEL: The knob that set the trigger level; press the knob and the level will be cleaned to Zero.
50%: The instant execute button setting the trigger level to the vertical midpoint between the peaks of the trigger signal.
Force: Force to create a trigger signal and the function is mainly used in
“Normal” and “Single” mode.
Trigger Menu: The button that activates the trigger control menu.
Trigger Control
The oscilloscope provides two trigger types: single trigger and alternate trigger.
Single trigger: Use a trigger level to capture stable waveforms in two channels simultaneously.
Alternate trigger: Trigger on non-synchronized signals.
The Single Trigger and Alternate Trigger menus are described respectively as follows:
Single trigger
Single trigger has four modes: edge trigger, video trigger, slope trigger and pulse trigger.
Edge Trigger:
It happens when a specified voltage level
passes through the trigger input in the specified slope direction.
Video Trigger: Carry out field or line video trigger on the standard video signal.
Slope Trigger: The oscilloscope begins to trigger according to the signal rising or falling speed.
Pulse Trigger:
Use this trigger type to catch pulses with certain pulse width.
The four trigger modes in Single Trigger are described respectively as follows:
1. Edge Trigger
An edge trigger occurs on trigger threshold value of input signal. Select Edge trigger mode to trigger on rising edge or falling edge.
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5. Advanced User Guidebook
The Edge Trigger Menu is shown as Fig.5-17
Edge menu list:
Fig. 5-17 Edge trigger menu
Single Mode
Source
Coupling
Slope
Mode
Holdoff
Edge
CH1
CH2
EXT
EXT/5
AC Line
AC
DC
HF
LF
Auto
Normal
Single
Holdoff
Reset
Set vertical channel trigger type as edge trigger.
Select CH1 as trigger signal.
Select CH2 as trigger signal.
Select Ext-trigger as trigger signal
Select attenuated Ext TRIG/5 as trigger signal.
Select power line as trigger signal.
Not allow DC portion to pass.
Allow all portion pass.
Not allow high frequency of signal pass and only low frequency portion pass.
Not allow low frequency of signal pass and only high frequency portion pass.
Trigger in signal rising edge
Trigger in signal falling edge
Acquire waveform even no trigger occurred
Acquire waveform when trigger occurred
When trigger occurs, acquire one waveform then stop
100ns~10s, adjust M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
2. Video Trigger
Choose video trigger to trigger on fields or lines of NTSC, PAL or SECAM standard video signals.
Trig menu refer to Fig.5-18
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5. Advanced User Guidebook
Fig. 5-18 Video trigger menu
Video menu list:
Single Mode
Source
Modu
Sync
Video
CH1
CH2
EXT
EXT/5
NTSC
PAL
SECAM
Line
Field
Odd
Even
Line NO.
Mode
Holdoff
Auto
Holdoff
Reset
3. Slope Trigger
Set vertical channel trigger type as video trigger
Select CH1 as the trigger source
Select CH2 as the trigger source
The external trigger input
Ext-trigger divided to 5 to extend trigger level range
Select video modulation
Synchronic trigger in video line
Synchronic trigger in video field
Synchronic trigger in video odd filed
Synchronic trigger in video even field
Synchronic trigger in designed video line, turn the M knob to set the line number
Acquire waveform even no trigger occurred
100ns~10s, adjust the M knob to set time interval before another trigger occur
Set Holdoff time as 100ns
Slope trigger sets the oscilloscope as the positive/negative slope trigger within the specified time.
The Slope Trigger Menu is shown as
Fig. 5-19
.
Fig. 5-19 Slope trigger menu
Slope trigger menu list
MENU SETTING INSTRUCTION
Single
Mode
Slope Set vertical channel trigger type as slope trigger.
Source
CH1
CH2
Select CH1 as the trigger source.
Select CH2 as the trigger source.
When slope
Slope selecting
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5. Advanced User Guidebook
Threshold
&SlewRate
Mode
Holdoff
High level
Low level
Slew rate
Auto
Normal
Single
Holdoff
Reset
4. Pulse Width Trigger
Set slope condition; turn the M knob to set slope time.
Adjust M knob to set the
High level
upper limit.
Adjust M knob to set
Low level lower limit.
Slew rate=(
High level- Low level)/ Settings
Acquire waveform even no trigger occurred
Acquire waveform when trigger occurred
When trigger occurs, acquire one waveform then stop
100ns~10s, turn the M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
Pulse trigger occurs according to the width of pulse. The abnormal signals can be detected through setting up the pulse width condition.
The Pulse Width Trigger Menu is shown as
Fig. 5-20
.
Fig. 5-20 Pulse Width Trigger menu
Pulse Width Trigger menu list
Single Mode
Source
Coupling when
Pulse
CH1
CH2
AC
DC
HF
LF
Polarity
Set vertical channel trigger type as pulse trigger.
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Not allow DC portion to pass.
Allow all portion pass.
Not allow high frequency of signal pass and only low frequency portion pass.
Not allow low frequency of signal pass and only high frequency portion pass
Choose the polarity
Mode Auto
Normal
Select pulse width condition and adjust the M knob to set time.
Acquire waveform even no trigger occurred
Acquire waveform when trigger occurred
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5. Advanced User Guidebook
Holdoff
Reset
100ns~10s, adjust M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
Alternate trigger
Trigger signal comes from two vertical channels when alternate trigger is on. This mode is used to observe two unrelated signals. You can choose different trigger modes for different channels. The options are as follows: edge, video, pulse or slope.
1. Alternate trigger (Trigger mode: Edge)
Alternate trigger (Trigger Type: Edge)
Menu is shown as
Fig.5-21
.
Fig.5-21 Alternate trigger (Trigger Type: Edge) Menu
Alternate trigger (Trigger Type: Edge)
Menu
list:
Alternate
Mode
Source
Couple
Slope
Mode
Holdoff
Edge
CH1
CH2
AC
DC
HF
LF
Auto
Holdoff
Reset
Set vertical channel trigger type as edge trigger.
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Not allow DC portion to pass.
Allow all portion pass.
Not allow high frequency of signal pass and only low frequency portion pass.
Not allow low frequency of signal pass and only high frequency portion pass.
Trigger in signal rising edge
Trigger in signal falling edge
Acquire waveform even no trigger occurred
100ns~10s, adjust M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
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5. Advanced User Guidebook
2. Alternate trigger (Trigger Mode: video)
Alternate trigger (Trigger Type: video) Me nu is shown as
Fig.5-22
.
Fig.5-22 Alternate trigger (Trigger Type: video) Menu
Alternate trigger (Trigger Type: video)
Menu
list:
Alternate
Mode
Video Set vertical channel trigger type as video trigger.
Source
Modu
Sync
Mode
Holdoff
CH1
CH2
NTSC
PAL
SECAM
Line
Field
Odd Field
Even Field
Line NO.
Auto
Holdoff
Reset
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Select video modulation
Synchronic trigger in video line.
Synchronic trigger in video field.
Synchronic trigger in video odd filed
Synchronic trigger in video even field
Synchronic trigger in designed video line, turn the M knob to set the line number
Acquire waveform even no trigger occurred
100ns~10s, adjust the M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
3. Alternate trigger (Trigger Mode: Slope)
Alternate trigger (Trigger Type: Slope) Menu is shown as Fig.5-23.
Fig.5-23 Alternate trigger (Trigger Type: Slope) Menu
Alternate trigger (Trigger Type: Slope) menu list:
MENU SETTING INSTRUCTION
Alternate
Mode
Slope Set vertical channel trigger type as slope trigger.
Source
CH1
CH2 slope
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Select slope condition
When
Set slope condition; turn the M knob to set time.
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5. Advanced User Guidebook
Threshold
Mode
Holdoff
High level
Low level
Slew rate
Auto
Holdoff
Reset
Turn M knob to set the
High level
Turn M knob to set
Low level
Slew rate=(
High level- Low level)/ Settings
Acquire waveform even no trigger occurred
100ns~10s, adjust the M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
4. Alternate trigger (Trigger Mode: Pulse)
Alternate trigger (Trigger Type: Pulse)
Menu is shown as
Fig.5-24
.
Fig.5-24 Alternate trigger (Trigger Type: Pulse)
Menu
Alternate trigger (Trigger Type: Pulse) menu list
Alternate
Mode
Source
Coupling
Pulse
CH1
CH2
AC
DC
HF
LF
Polarity
Set vertical channel trigger type as pulse trigger.
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Not allow DC portion to pass.
Allow all portion pass.
Not allow high frequency of signal pass and only low frequency portion pass.
Not allow low frequency of signal pass and only high frequency portion pass.
Choose the polarity when
Select pulse width condition and turn the M knob to set time.
Mode
Holdoff
Auto
Holdoff
Reset
Acquire waveform even no trigger occurred
100ns~10s, adjust M knob to set time interval before another trigger occur.
Set Holdoff time as 100ns
Term interpretation
1. Source: Trigger can occur from several sources: Input channels (CH1, CH2), AC
Line, Ext, Ext/5. z Input: It is the most commonly used trigger source. The channel will work when
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5. Advanced User Guidebook selected as a trigger source whatever displayed or not. z Ext Trig: The instrument can trigger from a third source while acquiring data from
CH1 and CH2. For example, you might want to trigger from an external clock or with a signal from another part of the test circuit. The Ext, Ext/ 5 trigger sources use the external trigger signal connected to the EXT TRIG connector. Ext uses the signal directly; it has a trigger level range of +1.6 V to -1.6 V. The EXT/ 5 trigger source attenuates the signal by 5X, which extends the trigger level range to +8 V to
-8 V. This allows the oscilloscope to trigger on a larger signal z AC Line: AC power can be used to display signals related to the power line frequency, such as lighting equipment and power supply devices. The oscilloscope gets triggered on its power cord, so you do not have to input an AC trigger signal.
When AC Line is selected as trigger source, the oscilloscope automatically set coupling to DC, set trigger level to 0V.
2. Trigger Mode:
The trigger mode determines how the oscilloscope behaves in the absence of a trigger event. The oscilloscope provides three trigger modes: Auto, Normal, and Single. z Auto: This sweep mode allows the oscilloscope to acquire waveforms even when it does not detect a trigger condition. If no trigger condition occurs while the oscilloscope is waiting for a specific period (as determined by the time-base setting), it will force itself to trigger. z Normal: The Normal mode allows the oscilloscope to acquire a waveform only when it is triggered. If no trigger occurs, the oscilloscope keeps waiting, and the previous waveform, if any, will remain on the display. Single: In Single mode, after pressing the Run/Stop key, the oscilloscope waits for trigger. While the trigger occurs, the oscilloscope acquires one waveform then stop. z Single: In Single mode, after pressing the Run/Stop key, the oscilloscope waits for trigger. While the trigger occurs, the oscilloscope acquires one waveform then stop.
3. Coupling:
Trigger coupling determines what part of the signal passes to the trigger circuit.
Coupling types include AC, DC, LF Reject and HF Reject. z AC: AC coupling blocks DC components. z DC: DC coupling passes both AC and DC components. z LF Reject: LF Reject coupling blocks DC component, and attenuates all signal with a frequency lower than 8 kHz. z HF Reject: HF Reject coupling attenuates all signals with a frequency higher than 150 kHz.
4. Holdoff: A time interval before the oscilloscope responses to next trigger signal.
During this Holdoff period, the trigger system becomes “blind” to trigger signals. This function helps to view complex signals such as an AM waveform. Press Holdoff button to activate “TRIG LEVEL” knob, then turn it to adjust Holdoff time.
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5. Advanced User Guidebook
How to Operate the Function Menu
The function menu control zone includes 8 function menu buttons: Measure,
Acquire, Utility, Cursor, Autoscale, Save, Display, Help and 4 immediate-execution buttons: Autoset, Run/Stop, Single, Copy.
How to Implement Sampling Setup
Press the Acquire button and the menu is displayed in the screen, shown as
Fig.5-25.
Fig.5-25 ACQU MODE Menu
The description of the Acqu Mode Menu is shown as follows:
Function Menu
Sample
Sample
Peak detect
Average
Setting
4, 16, 64, 128
Description
General sampling mode.
It is used for the detection of the jamming burr and the possibility of reducing the confusion.
It is used to reduce the random and don’t-care noises, with the optional number of averages.
The description of the Record Length Menu is shown as follows:
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5. Advanced User Guidebook
Function Menu
Length
Setting
1000
10K
100K
1M
10M
Description
Choose the record length
Change the ACQU Mode settings and observe the consequent variation of the wave form displayed.
Fig.5-26 Peak Detect mode, under which the burrs on the falling edge of the square wave, can be detected and the noise is heavy.
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5. Advanced User Guidebook
Fig.5-27 Common ACQU Mode display, in which no burr can be detected.
Fig.5-28 The displayed waveform after the noise is removed under the
Average Mode, in which the average number of 16 is set.
How to Set the Display System
Push down the Display button and the menu displayed in the screen is shown as
Fig.5-29.
Fig.5-29 Display Set Menu
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5. Advanced User Guidebook
The description of the Display Set Menu is shown as follows:
Function Menu
Type
Persist
XY Mode
Cymometer
VGA Disp
Time
Setting
Dots
Vect
OFF
1 second
2 seconds
5 seconds
Infinity
Clear
ON
OFF
ON
OFF
ON
OFF
Description
Only the sampling points are displayed.
The space between the adjacent sampling points in the display is filled with the vector form.
Turn the M knob to set the persistence time
Clear the persistence
Turn on the XY display function;
Turn off the XY display function.
Turn on the cymometer ;
Turn off the cymometer.
Connect the VGA port to a monitor. If set it as
ON, the waveform could be displayed on the computer monitor.
Display Type: With the F1 menu selection button pushed down, you can shift between Vect and Dots types. The differences between the two display types can be observed through the comparison between Fig.5-30 and Fig.5-31.
Fig.5-30 Display in the Vector Form
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5. Advanced User Guidebook
Fig.5-31 Display in Dots form
Persist
When the Persist function is used, the persistence display effect of the picture tube oscilloscope can be simulated. The reserved original data is displayed in fade color and the new data is in bright color. Press the H2 button, the Persist menu will display at the right of screen. Press the F1 button, different persistence time can be chosen: OFF, 1second, 2second, 5second and Infinity. When the
“Infinity” option is set for Persist time, the measuring points will be stored till the controlling value is changed (see Fig.5-34). By pressing the F2 button, the persistence will be cleared.
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5. Advanced User Guidebook
Fig.5-32 Infinite Persistence Display
XY Format
This format is only applicable to Channel 1 and Channel 2. After the XY display format is selected, Channel 1 is displayed in the horizontal axis and Channel 2 in the vertical axis; the oscilloscope is set in the un-triggered sample mode: the data are displayed as bright spots.
The operations of all control knobs are as follows:
The Vertical VOLTS/DIV and the VERTICAL POSITION knobs of
Channel 1 are used to set the horizontal scale and position.
The Vertical VOLTS/DIV and the VERTICAL POSITION knobs of
Channel 2 are used to set the vertical scale and position continuously.
The following functions can not work in the XY Format:
Reference or digital wave form
Cursor
Time base control
Trigger control
FFT
Operation steps:
1. Press the Display button and call out the Display Set Menu.
2. Press the H3 menu selection button to set XY Mode ON. The display format
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5. Advanced User Guidebook is changed to be XY mode (see Fig.5-33).
Fig.5-33 XY Display Mode
Cymometer
It is a 6-digit cymometer. The cymometer can measure frequencies from 2Hz to the full bandwidth. Only if the measured channel has triggering signal and in Edge mode, it can measure frequency correctly. In the Single trigger mode, it is a one channel cymometer and it can only measure the frequency of the triggering channel. In the
ALT trigger mode, it is a two channel cymometer and it can measure the frequency of two channels. The cymometer is displayed at the right bottom of the screen.
To turn the cymometer on or off:
1. Press the Display button.
2. In the Display menu, press the H4 button to toggle between the cymometer display ON or OFF.
VGA Output
The VGA port could be connected to a computer monitor. The image of the oscilloscope can be clearly displayed on the monitor.
To set the VGA Output:
1. Press the Display button.
2. In the Display menu, press the H5 button to toggle between ON or OFF.
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5. Advanced User Guidebook
How to Save and Recall a Waveform
Press the Save button, you can save the waveforms and settings in the instrument.
The menu displayed in the screen is shown as Fig.5-34.
Fig.5-34 Waveform Save Menu
The description of the Save Function Menu is shown as the following table:
Function Menu
Type
Setting Description
Wave
Setting
Image
Record
Choose the saving type (the Record Type
see “How to Record/Playback Waveforms” on P51)
When the type is Wave, the menu shows as following:
Source
CH1
CH2
Math
Choose the waveform to be saved.
Object & Show
Show
ON
OFF
Recall or close the waveform stored in the current object address. When the show is
ON, if the current object address has been used, the stored waveform will be shown, the address number and relevant information will be displayed at the top left of the screen; if the address is empty, “None is saved” will be displayed.
Save the waveform of the source to the
Save
Storage
Internal
External selected address. You can also press Copy button to do it. Storage format is vector.
Save to internal storage or USB storage.
When External is selected, save the waveform according to the current record
The file will be named according to the current system time. The waveform file could be open by OWON waveform analysis software (on the supplied CD).
When the type is Setting, the menu shows as following:
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5. Advanced User Guidebook
Setting
Setting1
…..
Setting8
The setting address
Save
Save the current oscilloscope setting to the internal storage
Load Recall the setting from the selected address
When the type is Image, the menu shows as following:
Save
Save the current display screen. You can also press Copy button to do it. The file can be only stored in a USB storage, so a USB storage must be connected first. The file is stored in BMP format, named according to the current system time.
Save and Recall the Waveform
The SDS series oscilloscope can store 15 waveforms, which can be displayed with the current waveform at the same time. The stored waveform called out can not be adjusted.
In order to save the waveform of the CH1 into the address 1, the operation steps should be followed:
1. Saving: Press the H1 button, the Type menu will display at the left of screen, turn the M knob to choose Wave for Type.
2. Press the H2 button and press F1 button to select CH1 for Source.
3. Press the H3 button and press the F1, turn the M knob to select 1 as object address.
4. Press the H5 button and press F1 button to select Internal.
5. Press the H4 button to save the waveform.
6. Recalling: Press the H3 button, and press the F1, turn the M knob to select 1 as object address. Press F2 button to set Show as ON. The waveform stored in the address will be shown, the address number and relevant information will be displayed at the top left of the screen.
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5. Advanced User Guidebook
Fig.5-35 Wave Saving
How to Record/Playback Waveforms
Wave Record function can record the input current wave. You can set the interval between recorded frames in the range of 1ms~1000s.The max frame number reaches
1000,and you can get better analysis effect with playback and storage function.
Wave Record contains four modes: OFF, Record, Playback and Storage.
Record: To record wave according to the interval until it reaches the end frame set.
Record menu shows as follows:
Menu Setting
OFF
Instruction
Close wave record function
Mode
Record
Playback
Storage
Set record menu
Set playback menu
Set storage menu
Record mode
FrameSet
Refresh
End frame Turn the M knob to select the number of frames to record (1～1000)
Interval
ON
OFF
Turn the M knob to select the interval between recorded frames (1ms～1000s)
Refresh wave during recording
Stop refreshing
Operate
Play
Stop
Begin to record
Stop recording
Note:
Both of the waveforms of Channel 1 and Channel 2 will be recorded. If a Channel is turned off while recording, the waveform of the channel is invalid in the playback mode.
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5. Advanced User Guidebook
Fig.5-36 Wave Record
Playback: Play back the wave recorded or saved.
Playback menu shows as follows:
Menu Setting
Start frame
Instruction
Turn the M knob to select the number of start frame to playback (1～1000)
Playback Mode
FrameSet
End frame
Cur frame
Interval
Turn the M knob to select the number of end frame to playback (1～1000)
Turn the M knob to select the number of current frame to playback (1～1000)
Turn the M knob to select the interval between
Play mode
Operate
Loop
Once
Play
Stop played back frames (1ms～1000s)
Play back the wave continuously
Play back the wave just one time
Begin to record
Stop recording
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5. Advanced User Guidebook
Fig.5-37 Wave Playback
Storage: Save the current wave according to the start frame and end frame set.
Storage menu shows as follows:
Menu Setting
Storage Start frame
Instruction
Turn the M knob to select the number of start frame to store (1～1000)
Mode
Frame Set
End frame
Turn the M knob to select the number of end frame to store (1～1000)
Save
Load
Save the waveform record file to the internal memory
Load the waveform record file from the memory
Fig.5-38 Wave Storage
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5. Advanced User Guidebook
To use wave record function, do as follows:
(1) Press Save button.
(2) Press H1 button, turn the M knob to choose Record.
(3) Press H2 button. In the Mode menu, press F2 button to choose Record.
(4) Press H3 button. In the Frame Set menu, press F1 button and turn the M knob to set End frame; press F2 button and turn the M knob to select the interval between recorded frames.
(5) Press H4 button, choose whether to refresh the wave when recording.
(6) Press H5 button to start recording.
(7) Press H2 button. In the Mode menu, press F3 button to enter the Playback mode.
Set the frame range and Playmode .Then, press H5 button to play.
(8) To save the wave recorded, press H2 button. In the Mode menu, press F4 button to choose Storage, then set the range of frames to store, press H4 button to save.
(9) To load the waveform from the internal memory, press Load, and then enter playback mode to analyze the wave.
How to Implement the Auxiliary System Function Setting
●Config
Press the Utility button and turn the M knob to select Config to go to the following menu.
Fig.5-39 Configuration Menu
The description of Configuration Menu is shown as the follows:
Function Menu Setting
language
Chinese
English
Others
Set Time
Description
Choose the display language of the operating system.
Display
On
Off
On/Off the date display
Hour Min Setting Hour/Minute
Day Month Setting Date/Month
KeyLock
About
Lock all keys. Unlock method: press 50% button in trigger control area, then press
Force button, repeat 3 times.
Version number and serial number showing
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5. Advanced User Guidebook
●Display
Press the Utility button and turn the M knob to select the Display to go to the following menu.
Fig.5-40 Display Menu
The description of
Display Menu
is shown as the follows:
Function Menu
Setting Description
Graticule Select the grid type
Battery
ON
OFF
Turn on or off the battery display
5s~50s, OFF Set the disappear time of menu Menu Time
●Adjust
Press the Utility button and turn the M knob to select the Adjust to go to the following menu.
Fig.5-41 Adjust Menu
The description of Adjust Menu is shown as the follows:
Function Menu
Self Cal
Default
Setting Description
Carry out the self-calibration procedure.
Call out the factory settings.
Do Self Cal (Self-Calibration)
The self-calibration procedure can improve the accuracy of the oscilloscope under the ambient temperature to the greatest extent. If the change of the ambient temperature is up to or exceeds 5℃, the self-calibration procedure should be executed to obtain the highest level of accuracy.
Before executing the self-calibration procedure, disconnect the probe or wire and the input connector. Press the Utility button. Then, press the H1 button and the function menu will display at the left of the screen, turn the M knob to choose
“Adjust”, then press the H2 button to choose “Self Cal”, entering the
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5. Advanced User Guidebook self-calibration procedure of the instrument.
Fig.5-42 Self-Calibration
● Pass/Fail
The Pass/Fail function monitors changes of signals and output pass or fail signals by comparing the input signal that is within the pre-defined mask.
Press the Utility button and turn the M knob to select the Pass/fail to go to the following menu.
Fig.5-43 Pass/Fail menu
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5. Advanced User Guidebook
The description of Pass/Fail Menu is shown as the follows:
Function Menu Setting Description operate
Enable
Operate
Control enable switch
Control operate switch
Output
Pass
Fail
Beep
Stop
Info
Signal tested corresponds with the rule
Signal tested not correspond with the rule
Beep when it satisfies the rule
Stop once satisfying the rule
Control the display status of info frame
Rule
SaveRule
Source
Horizontal
Vertical
Create
Number
Save
Load
Select source CH1, CH2 or Math
Change the Horizontal tolerance value by turning the
M knob
Change the Vertical tolerance value by turning the
M knob
Use the rule set as testing rule
Choose any one from Rule1~Rule8 as your rule name
Click Save to save the rule
Load some rule as the testing rule
Pass/Fail test:
Detect whether the input signal is within the limits of the rule, if it exceeds limits of the rule, it is “Fail”; otherwise it is “Pass”. Also it can output fail or pass signal by built-in, configurable and photoelectric isolation output port. To run the test, read the following steps:
1. Press Utility button, then H1 button, turn the M knob to choose Pass/fail menu option, Pass/Fail menu will be displayed in the bottom.
2. Enable switch on: Press H2 button to show Operate menu, then, press F1 button to set Enable as ON.
3. Create rule: Press H4 button to enter Rule setting menu. Press F1 button to choose the source; Press F2 button, turn the M knob to set Horizontal tolerance;
Press F3 button, turn the M knob to set Vertical tolerance; Press F4 button to create the rule.
4. Set output type: Press H3 button to enter Output option setting. Choose any one or two of the options “Pass”, “Fail” or “Beep”. “Pass” and “Fail” are mutually exclusive options, which could not be chosen simultaneously. “Stop” means stop once the condition satisfies your setting.
5. Begin to test: Press H2 button, then F2 button to select “Start”, the test will begin.
6. Save rule: Press H5 button, then F2 button to save the rules, which could be called up at once when need, press F3 button to call up the rule saved.
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5. Advanced User Guidebook
Fig.5-44 Pass/Fail test
Note:
1. When Pass/Fail is ON, if XY or FFT is ready to run, then Pass/Fail will be closed; under the mode of XY or FFT, Pass/Fail is unable.
2. Under the mode of Factory, Auto Scale and Auto Set, Pass/Fail will be closed.
3. When no save setting left in the rule save, tip will be given to show “NO RULE
SAVED”.
4. Under the status of stop, data comparing will stop, and when it goes on running, the number of Pass/Fail will increase from the former number, not from zero.
5. When the waveform playback mode is on , Pass/Fail is used to test the the played-back waveform specially.
● Output
Press the Utility button and turn the M to select the Output to go to the following menu.
Fig.5-45 Output menu
The description of Output menu is shown as the follows:
Function
Menu
Type
Setting
Trig level
Pass/fail
Description
Output trig signal synchronously
Output High Level when Pass , and Low Level when Fail
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5. Advanced User Guidebook
How to Measure Automatically
Press the Measure button to display the menu for the settings of the Automatic
Measurements.
The oscilloscopes provide 20 parameters for auto measurement, including Vpp,
Vmax, Vmin, Vtop, Vbase, Vamp, Vavg, Vrms, Overshoot, Preshoot, Freq, Period,
Rise Time, Fall Time, Delay A→B , Delay A→B ,+Width, -Width, +Duty, -Duty.
That’s 10 voltage and 10 time measurements in all.
The menu is displayed as Fig.5-46.
Fig.5-46 Measure Menu
The “Automatic Measurements” menu is described as the following table:
Function Menu
Type
Add
Source
Show all
Setting
CH1
CH2
Description
Press F1 ,show the measure types
Select the source
Show all the measures on the screen
Add the selected measure types (shown
Remove all types at most)
Remove all the measures
Remove
Remove Remove the chosen measure type
Measure
The measured values can be detected on each channel simultaneously. Only if the waveform channel is in the ON state, the measurement can be performed. The
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5. Advanced User Guidebook automatic measurement cannot be performed in the following situation: 1) On the saved waveform. 2) On the mathematical waveform. 3) On the XY format. 4) On the Scan format.
Measure the frequency, the peak-to-peak voltage of the Channel CH1 and the mean, the RMS of the Channel CH2, following below steps:
1. Press the Measure button to show the automatic measurement function menu.
2. Press the H1 button to display the Add menu.
3. Press the F2 button and choose CH1 as the source.
4. Press the F1 button, the type items will display at the left of screen, and turn the
M knob to choose Period.
5. Press the F4 button, the period options added completes.
6. Press the F1 button again, the type items will display at the left of screen, and turn the M to choose Freq.
7. Press the F4 button, the frequency added completes, finish setting of CH1.
8. Press the F2 button and choose CH2 as the source.
9. Press the F1 button, the type items will display at the left of screen, and turn the
M to choose Mean.
10. Press the F4 button, the Mean added completes.
11. Press the F1 button, the type items will display at the left of screen, and turn the
M to choose PK-PK.
12. Press the F4 button, the PK-PK added completes, finish setting of CH2.
The measured value will be displayed at the bottom left of the screen automatically (see Fig.5-47).
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5. Advanced User Guidebook
Fig.5-47 automatic measurement
The automatic measurement of voltage parameters
The SDS series oscilloscopes provide automatic voltage measurements including
Vpp, Vmax, Vmin, Vavg, Vamp, Vrms, Vtop, Vbase, Overshoot and Preshoot.
Fig.5-48 below shows a pulse with some of the voltage measurement points.
Fig.5-48
Vpp: Peak-to-Peak Voltage.
Vmax: The maximum amplitude. The most positive peak voltage measured over the entire waveform.
Vmin: The minimum amplitude. The most negative peak voltage measured over the entire waveform.
Vamp: Voltage between Vtop and Vbase of a waveform.
Vtop: Voltage of the waveform’s flat top, useful for square/pulse waveforms.
Vbase: Voltage of the waveform’s flat base, useful for square/pulse waveforms.
Overshoot: Defined as (Vmax-Vtop)/Vamp, useful for square and pulse waveforms.
Preshoot: Defined as (Vmin-Vbase)/Vamp, useful for square and pulse waveforms.
Average: The arithmetic mean over the entire waveform.
Vrms: The true Root Mean Square voltage over the entire waveform.
The automatic measurement of time parameters
The SDS series oscilloscopes provide time parameters auto-measurements include Frequency, Period, Rise Time, Fall Time, +Width, -Width, Delay 1→2 ,
Delay 1→2 , +Duty and -Duty.
Figure 5-49 shows a pulse with some of the time measurement points.
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5. Advanced User Guidebook
Fig.5-49
Rise Time: Time that the leading edge of the first pulse in the waveform takes to rise from 10% to 90% of its amplitude.
Fall Time: Time that the falling edge of the first pulse in the waveform takes to fall from 90% to 10% of its amplitude.
+Width: The width of the first positive pulse in 50% amplitude points.
-Width: The width of the first negative pulse in the 50% amplitude points.
Delay 1→2 : The delay between the two channels at the rising edge.
Delay 1→2 : The delay between the two channels at the falling edge.
+Duty: +Duty Cycle, defined as +Width/Period.
-Duty:-Duty Cycle, defined as -Width/Period.
How to measure with cursors
Press the Cursor button to display the cursor measurement function menu (CURS
MEAS) in the screen.
The Cursor Measurement for normal model:
The cursor measurement includes Voltage Measurement and Time Measurement at normal model, shown as Fig.5-50.
Fig.5-50 CURS MEAS Menu
The description of the cursor measurement menu is shown as the following table:
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5. Advanced User Guidebook
Function
Menu
Setting Description
Type
Source
OFF
Voltage
Time
CH1
CH2
Switch off the cursor measurement.
Display the voltage measurement cursor and menu.
Display the time measurement cursor and menu.
Display the channel generating the waveform to which the cursor measurement will be applied.
When carrying out the cursor measurement, the position of Cursor 1 can be adjusted with the VERTICAL POSITION knob of Channel 1, and that of Cursor 2 can be adjusted with the VERTICAL POSITION knob of Channel 2.
Perform the following operation steps for the voltage cursor measurement of the channel CH1:
1. Press Cursor and recall the Cursor Measure menu.
2. Press the H2 button and choose CH1 for Source.
3. Press the H1 button, the Type menu will display at the right of the screen.
Then press the F2 button to choose Voltage for Type, with two purple dotted lines displayed along the horizontal direction of the screen, which indicating
Cursor1 and Cursor2.
4. According to the measured waveform, adjust the positions of Cursor1 and
Cursor2 by turning the VERTICAL POSITION knob of CH1 and CH2.
Cursor increment window at the left bottom of waveform shows absolute value of D-value of cursor 1 and cursor 2 and the present position of the two cursors. (See Fig.5-51).
Fig.5-51 Waveform of Voltage Cursor Measurement
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5. Advanced User Guidebook
Carry out the following operation steps for the time cursor measurement of the channel CH1:
1. Press Cursor and recall the Cursor Measure menu.
2. Press the H2 button and choose CH1 for Source.
3. Press the H1 button, the Type menu will display at the right of the screen.
Press the F3 button to select Time for Type, with two purple dotted lines displayed along the vertical direction of the screen, which indicating Cursor
1 and Cursor 2.
4. According to the measured waveform, adjust the positions of Cursor1 and
Cursor2 by turning the VERTICAL POSITION knob of CH1 and CH2.
The cursor increment window at the left bottom of the waveform shows absolute difference, frequency and the present time of the two cursors.
Fig.5-52 Waveform of Cursor Measurement
The Cursor Measurement for FFT model:
Press the Cursor button to display the cursor measurement function menu (CURS
MEAS) in the screen, which includes Vamp Measurement and Freq Measurement at the mode of FFT, shown as Fig.5-53.
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5. Advanced User Guidebook
Fig.5-53 CURS MEAS Menu
The description of the cursor measurement menu is shown as the following table:
Function
Menu
Setting Description
Type
Source
OFF
Vamp
Switch off the cursor measurement.
Display the Vamp measurement cursor and menu.
Freq Display the Freq measurement cursor and menu.
Math FFT Display the channel for the cursor measure.
When carrying out the cursor measurement, the position of Cursor 1 can be adjusted with the VERTICAL POSITION knob of Channel 1, and that of Cursor 2 can be adjusted with the VERTICAL POSITION knob of Channel 2.
Perform the following operation steps for the Vamp cursor measurement:
1. Press Cursor and recall the Cursor Measure menu.
2. Press the H1 button, the Type menu will display at the right of the screen. Press the F2 button to select Vamp for Type, with two purple dotted lines displayed along the horizontal direction of the screen indicating Cursor1 and Cursor2.
3. According to the measured waveform, adjust the positions of Cursor1 and
Cursor2 by turning the VERTICAL POSITION knob of CH1 and CH2. Cursor increment window at the left bottom shows absolute value of the two cursors amplitude difference and the present position.
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5. Advanced User Guidebook
Fig.5-54 wave of Vamp cursor measurement
Carry out the following operation steps for the Freq cursor measurement:
1. Press Cursor and recall the Cursor Measure menu.
2. Press the H1 button, the Type menu will display at the right of the screen. Press the F3 button to select Freq for Type, with two purple dotted lines displayed along the vertical direction of the screen indicating the corresponding Cursor 1 and Cursor 2
3. According to the measured waveform, adjust the positions of Cursor1 and
Cursor2 by turning the VERTICAL POSITION knob of CH1 and CH2.
Increment window shows two cursors difference value and the present position.
(See Fig.5-55).
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5. Advanced User Guidebook
Fig.5-55 wave of Freq cursor measurement
How to use Autoscale
The function is applied to follow-up signals automatically even if the signals change at any time. Autoscale enables the instrument to set up trigger mode, voltage division and time scale automatically according to the type, amplitude and frequency of the signals.
The menu is as follows:
Function Menu Setting
Autoscale
ON
OFF
Fig.5-56 Autoscale menu
Turn on
Turn off
Autoscale.
Autoscale.
Instruction
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5. Advanced User Guidebook
Mode
Follow-up and adjust the vertical and horizontal settings.
Follow-up and adjust horizontal scale without changing vertical setting.
Follow-up and adjust vertical scale without changing horizontal setting.
Wave
Show Multi-period waveforms.
Only show one or two periods.
If you want to measure the two-channel signal, you can do as the follows:
1. Press Autoscale button, the function menu will appear.
2. Press
H1
to choose
ON.
3. Press H2 and choose
4. Press H3 and choose
for Mode item.
for Wave item.
Then the wave is displayed in the screen, shown as Fig.5-57.
Fig.5-57 Autoscale Horizontal- Vertical multi-period waveforms
Note:
1. Entering into Autoscale function and the
○ flicker will be at the top left of the screen. (flicker every 0.5 second)
2. In the mode of Autoscale, the oscilloscope can self-estimate “Trigger Type”
(Single, and Alternate) and “Mode” (Edge, Video). At this point, the trigger menu is not available.
3. At the mode of XY and STOP status, pressing Autoset to enter into Autoscale,
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5. Advanced User Guidebook
DSO switches to YT mode and AUTO status.
4. At the mode of Autoscale, DSO is always in the state of DC coupling and AUTO triggering. In this case, making Triggering or Coupling settings have no effect.
5. At the mode of Autoscale, if adjust the vertical position, voltage division, trigger level or time scale of CH1 or CH2, the oscilloscope will turn off Autoscale function and if press Autoset again, the oscilloscope will enter into Autoscale.
6. Turn off the submenu at the Autoscale menu, the Autoscale is off and turn on the submenu still enters into the function.
7. When video triggering, the horizontal time scale is 50us. If one channel is showing edge signal, the other channel is showing video one, the time scale refers to 50us as video one as standard.
8. While the Autoscale is working, below settings will be made forcibly:
(1) The unit will switch from non-main time base to main time base status.
(2) The unit will switch to Peak detection menu while in the state of Average sampling mode.
How to Use Executive Buttons
Executive Buttons include Autoset, Run/Stop, Single, Copy.
Autoset
This button is used for the automatic setting of all control values of the instrument to generate the waveform suitable for observation. Press the Autoset button and the oscilloscope will perform the fast automatic measurement of the signal.
The function items of Autoset are shown as the following table:
Function Items
Acquisition Mode
Setting
Current
Vertical Coupling
Vertical Scale
DC
Adjust to the proper division.
Bandwidth Full
Horizontal Level Middle
Horizontal Sale
Trigger Type
Trigger Source
Adjust to the proper division
Current
Show the minimum number of channels.
Trigger Coupling
Trigger Slope
Trigger Level
Trigger Mode
Display Format
Current
Current
Mid-point Setting
Auto
YT
Run/Stop:
Enable or disable the waveform sampling.
Notice: Under the Stop state, the vertical division and the horizontal time base of the waveform can be adjusted within a certain range, in other words,
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5. Advanced User Guidebook the signal can be expanded in the horizontal or vertical direction.
When the horizontal time base equal to or is less than 50ms, the horizontal time base can be expanded for 4 divisions downwards.
Single:
Press this button you can set the trigger mode as single directly, so when trigger occurs, acquire one waveform then stop.
Copy:
This button is the shortcut of saving function of the Save function menu.
Pressing this button is equal to the Save option in the Save function menu.
The current waveform or the display screen could be saved according to the
setting of the Save function menu. For more details, please see “
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6. Demonstration
6. Demonstration
Example 1: Measurement of Simple Signals
Observe an unknown signal in the circuit, and display and measure rapidly the frequency and peak-to-peak voltage of the signal.
1. Carry out the following operation steps for the rapid display of this signal:
(1) Set the probe menu attenuation coefficient as 10X and that of the switch in the
probe switch as 10X (see “How to Set the Probe Attenuation Coefficient” on
(2) Connect the probe of Channel 1 to the measured point of the circuit.
(3) Push down the Autoset button.
The oscilloscope will implement the Autoset to make the waveform optimized, based on which, you can further regulate the vertical and horizontal divisions till the waveform meets your requirement.
2. Perform Automatic Measurement
The oscilloscope can measure most of the displayed signals automatically. To measure the period and frequency of the Channel 1 and the mean and peak-to-peak voltage of the Channel 2, follow below steps:
(1) Press the Measure button to show the automatic measurement function menu.
(2) Press the H1 to display the Add menu.
(3) Press the F2 button to choose CH1 as the source.
(4) Press the F1 button, the type items will display at the left of screen, and turn the
M knob to choose Period.
(5) Press the F4 button, the period measurement will be added.
(6) Press the F1 button again, the type items will display at the left of screen, and turn the M knob to choose Freq.
(7) Press the F4 button, the frequency measurement will be added, finish settings of channel 1.
(8) Press the F2 button to choose CH2 as the source.
(9) Press the F1 button, the type items will display at the left of screen, and turn the
M knob to choose Mean.
(10) Press the F4 button, the mean measurement will be added.
(11) Press the F1 button, the type items will display at the left of screen, and turn the
M knob to choose PK-PK.
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6. Demonstration
(12) Press the F4 button, the peak-to-peak voltage measurement will be added, finish settings of channel 2.
Then, the period, frequency, mean and peak-to-peak voltage will be displayed at the bottom left of the screen and change periodically (see Fig.6-1).
Fig.6-1 Waveform of Automation Measurement
Example 2:
Gain of the Amplifier in the Metering Circuit
Set the probe menu attenuation coefficient as 10X and that of the switch in the probe
as 10X (see “How to Set the Probe Attenuation Coefficient” on P14).
Connect the oscilloscope CH1 channel with the circuit signal input end and the CH2 channel to the output end.
Operation Steps:
(1) Push down the Autoset button and the oscilloscope will automatically adjust the waveforms of the two channels into the proper display state.
(2) Push down the Measure button to show the Measure menu.
(3) Press the H1 button.
(4) Press the F2 button and choose CH1.
(5) Press the F1 button and turn the M knob to choose PK-PK.
(6) Press the F2 button and choose CH2.
(7) Press the F1 button again and turn the M knob to choose PK-PK.
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6. Demonstration
(8) Read the peak-to-peak voltages of Channel 1 and Channel 2 from the bottom left of the screen (See Fig.6-2).
(9) Calculate the amplifier gain with the following formulas.
Gain = Output Signal / Input signal
Gain (db) = 20×log (gain)
Fig.6-2 Waveform of Gain Measurement
Example 3: Capture the Single Signal
The digital storage oscilloscope takes the lead in providing the convenience capturing of such non-periodic signals as pulse and burr, etc. If you intent to capture a single signal, you can not set the trigger level and the trigger edge unless you have particular priori knowledge of this signal. For example, if the pulse is the logic signal of a TTL level, the trigger level should be set to 2 volts and the trigger edge be set as the rising edge trigger. If it is uncertain as to the signal, you can make an observation of it in advance under the automatic or ordinary mode to determine the trigger level and the trigger edge.
The operation steps are as follows:
(1) Set the probe menu attenuation coefficient to 10X and that of the switch in the
probe to 10X (see “How to Set the Probe Attenuation Coefficient” on P14).
(2) Adjust the VOLTS/DIV and SEC/DIV knobs to set up a proper vertical and horizontal ranges for the signal to be observed.
(3) Press the Acquire button to display the Acquire menu.
(4) Press the H1 button to display the Acquire Mode menu.
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6. Demonstration
(5) Press the F2 button to choose Peak detect.
(6) Press the Trigger Menu button to display the Trigger menu.
(7) Press the H1 button to display the Trigger Type menu.
(8) Press the F1 to choose Single as the type.
(9) Turn the M knob to choose Edge as the mode.
(10) Press the H2 button to display the Source menu.
(11) Press the F1 button to choose CH1 as the source.
(12) Press the H3 button to display the Coupling menu; press the F2 button to choose
DC as the Coupling.
(13) Press the H4 button to choose (rising) as the Slope.
(14) Rotate the TRIG LEVEL knob and adjust the trigger level to the mid-value of the signal to be measured.
(15) If the Trigger State Indicator at the top of the screen does not indicate Ready, push down the Run/Stop button and start acquiring, waiting the emergence of the signal in conformity with the trigger conditions. If a signal reaches to the set trigger level, one sampling will be made and then displayed in the screen. With this function, any random occurrence can be captured easily. Taking the burst burr of larger amplitude for example, set the trigger level to the value just greater than the normal signal level, and then presses the Run/Stop button and waits.
When there is a burr occurring, the instrument will trigger automatically and record the waveform generated during the period around the trigger time. With the HORIZONTAL POSITION knob in the horizontal control area in the panel rotated, you can change the horizontal position of the trigger position to obtain the negative delay, making an easy observation of the waveform before the burr occurs (see Fig.6-3).
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6. Demonstration
Fig.6-3 Capture the Single Signal
Example 4: Analyze the Details of a Signal
Observe the Signal Containing Noises
If the signal is interfered by the noise, the noise may cause a failure in the circuit. For the analyzing of the noise in detail, please operate the instrument according to the following steps:
(1) Press the Acquire button to display the Acquire menu.
(2) Press the H1 button to display ACQU Mode menu.
(3) Press the F2 button to choose Peak detect.
In this case, the screen display contains the waveform of a random noise. Especially when the time base is set as Low Speed, then noise peak and burr contained in the signal can be observed with the peak detection (See Fig.6-4).
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6. Demonstration
Fig.6-4 Waveform of the Signal Containing Noises
Separate Noises from the Signal
When analyze the waveform of a signal, you should remove the noise in it. For the reduction of the random noise in the oscilloscope display, please operate the instrument according to the following steps:
(1) Press the Acquire button to display the Acquire menu.
(2) Press the H1 button to display ACQU Mode menu.
(3) Press the F3 button, turn the M knob and observe the waveform obtained from averaging the waveforms of different average number.
After the averaging, the random noise is reduced and the detail of the signal is easier to be observed. Shown as follows, after the noise is removed, the burrs on the rising and falling edges appear (see Fig.6-5).
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6. Demonstration
Fig.6-5 Waveform of the Noise-Removed Signal
Example 5: Application of X-Y Function
Examine the Phase Difference between Signals of two Channels
Example: Test the phase change of the signal after it passes through a circuit network.
Connect the oscilloscope with the circuit and monitor the input and output signals of the circuit.
For the examination of the input and output of the circuit in the form of X-Y coordinate graph, please operate according to the following steps:
(1) Set the probe menu attenuation coefficient for 10X and that of the switch in the
probe for 10X (see “How to Set the Probe Attenuation Coefficient” on P14).
(2) Connect the probe of channel 1 to the input of the network and that of Channel 2 to the output of the network.
(3) Push down the Autoset button, with the oscilloscope turning on the signals of the two channels and displaying them in the screen.
(4) Turn the VOLTS/DIV knob, making the amplitudes of two signals equal in the rough.
(5) Press the Display button and recall the Display menu.
(6) Press the H3 button and choose XY Mode as ON.
The oscilloscope will display the input and terminal characteristics of the network in the Lissajous graph form.
(7) Turn the VOLTS/DIV and VERTICAL POSITION knobs, optimizing the
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6. Demonstration waveform.
(8) With the elliptical oscillogram method adopted, observe and calculate the phase difference (see Fig.6-6).
The signal must be centered and kept in the horizontal direction.
Fig.6-6 Lissajous Graph
Based on the expression sin q =A/B or C/D, thereinto, q is the phase difference angle, and the definitions of A, B, C, and D are shown as the graph above. As a result, the phase difference angle can be obtained, namely, q =± arcsin (A/B) or ± arcsin (C/D).
If the principal axis of the ellipse is in the I and III quadrants, the determined phase difference angel should be in the I and IV quadrants, that is, in the range of (0 ～π /2) or (3π / 2 ～2π). If the principal axis of the ellipse is in the II and IV quadrants, the determined phase difference angle is in the II and III quadrants, that is, within the range of (π / 2 ～π) or (π ～3π /2).
Example 6: Video Signal Trigger
Observe the video circuit of a television, apply the video trigger and obtain the stable video output signal display.
Video Field Trigger
For the trigger in the video field, carry out operations according to the following steps:
(1) Press the Trigger Menu button to display the trigger menu.
78
6. Demonstration
(2) Press the H1 button to display the trigger type menu.
(3) Press the F1 button to choose Single for Type.
(4) Turn the M knob to choose Video as the mode.
(5) Press the H2 button to display the Source menu.
(6) Press the F1 button to choose CH1 for Source.
(7) Press the H3 button to display the Modu menu.
(8) Press the F1 button to choose NTSC for the modulation.
(9) Press the H4 button to display the sync menu.
(10) Press the F2 button to choose Field for Sync.
(11) Turn the VOLTS/DIV, VERTICAL POSITION and SEC/DIV knobs to obtain a proper waveform display (see Fig.6-7).
Fig.6-7 Waveform Obtained from Video Field Trigger
79
7. F.A.Q
7. F.A.Q
1. In the case of that the oscilloscope is still in the black-screen state without any display after the power is switch on, implement the following fault treatment procedure.
z Check whether the power connection is connected properly. z Check whether the power switch is pushed down to the designated position. z Check whether the fuse which is beside the
AC power input jack
is blew (the cover can be pried open with a straight screwdriver). z Restart the instrument after completing the checks above. z If this product still can not work normally, please get in touch with Lilliput and we will be under your service.
2. After acquiring the signal, carry out the following operations if the waveform of the signal is not displayed in the screen.
z Check whether the probe is properly connected to the signal connecting wire. z Check whether the signal connecting wire is correctly connected to the BNC
(namely, the channel connector). z Check whether the probe is properly connected with the object to be measured. z Check whether there is any signal generated from the object to be measured (the trouble can be shot by the connection of the channel from which there is a signal generated with the channel in fault). z Make the signal acquisition operation again.
3. The measured voltage amplitude value is 10 times greater or smaller than the actual value.
Check whether the channel attenuation coefficient and the attenuation ration of the
probe used in practical application is match (see “How to Set the Probe Attenuation
4. There is waveform displayed, but it is not stable.
z Check whether the Source item in the TRIG MODE menu is in conformity with the signal channel used in the practical application. z Check on the trigger Type item: The common signal chooses the Edge trigger mode for Type and the video signal the Video. If Alternate trigger is selected, both of the channel 1 and channel 2 trigger levels should be adjusted to the proper position. Only if a proper trigger mode is applied, the waveform can be displayed steadily. z Try to change the trigger coupling into the high frequency suppress and the low frequency suppress to smooth the high frequency or low frequency noise triggered by the interference.
5. No Display Responses to the Push-down of Run/Stop.
Check whether Normal or Signal is chosen for Polarity in the TRIG MODE menu and the trigger level exceeds the waveform range.
If it is, make the trigger level is centered in the screen or set the trigger mode as Auto.
In addition, with the Autoset button pressed, the setting above can be completed automatically.
80
7. F.A.Q
6. After the Average value sampling is set in the Acqu Mode (see “How to Implement
Sampling Setup” on P42 ), or the longer duration is set in the Persist in Display (see
“Persist” on P46), the display rate is slowed down.
It is a normal phenomenon.
81
8. Technical Specifications
8. 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.
system function menu and execute the “Auto-calibration” procedure (see “How to
Implement Auto-calibration” on P16).
All specification standards can be fulfilled, except one(s) marked with the word
“Typical”.
Performance Characteristics
Acquisition
Input
Bandwidth
Channel
Mode
Sample rate
(real time)
Instruction
SDS6062 60MHz
SDS7102 100MHz
SDS8102 100MHz
SDS8202 200MHz
SDS8302 300MHz
SDS9302 300MHz
2 + 1 (External)
Normal, Peak detect, Averaging
SDS6062
500MS/s
(250MS/s for dual channels)
SDS7102
1GS/s
(500MS/s for dual channels)
SDS8102
SDS8202
SDS8302
SDS9302
2GS/s
(1GS/s for dual channels)
2GS/s
(1GS/s for dual channels)
2.5GS/s
(1.25GS/s for dual channels)
3.2GS/s
(1.6GS/s for dual channels)
DC, AC , Ground Input coupling
Input impedance 1MΩ±2%, in parallel with 10pF±5pF
Probe attenuation
1X, 10X, 100X, 1000X factor
Max. input voltage 400V (PK-PK) (DC + AC PK-PK)
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8. Technical Specifications
Performance Characteristics
Horizontal
System
Instruction
Bandwidth limit
Channel –channel isolation
Time delay between channel(typical)
20MHz, full bandwidth
50Hz: 100 : 1
10MHz: 40 : 1
150ps
Sampling rate range
SDS6062
SDS7102
SDS8102
SDS8202
SDS8302
SDS9302
0.5S/s~500MS/s single channel*
0.5S/s~250MS/s dual channel
0.5S/s~1GS/s single channel*
0.5S/s~500MS/s dual channel
0.5S/s~2GS/s single channel*
0.5S/s~1GS/s dual channel
0.5S/s~2GS/s single channel*
0.5S/s~1GS/s dual channel
0.5S/s~2.5GS/s single channel*
0.5S/s~1.25GS/s dual channel
0.5S/s~3.2GS/s single channel*
0.5S/s~1.6GS/s dual channel
Record length
Scanning speed
(S/div)
10M points on each channel
SDS6062
SDS7102
SDS8102
SDS8202
SDS8302
SDS9302
5ns/div～100s/div, step by 1～2～5
2ns/div～100s/div, step by 1～2～5
2ns/div～100s/div, step by 1～2～5
1ns/div～100s/div, step by 1～2～5
1ns/div～100s/div, step by 1～2～5
1ns/div～100s/div, step by 1～2～5
Sampling rate / relay time accuracy
±100ppm
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8. Technical Specifications
Performance Characteristics
Vertical system
Measurement
Instruction
Interval( T accuracy
)
(DC～100MHz)
Single bandwidth
Low Frequency
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
Displacement
Analog bandwidth
SDS6062 ±10 DIV
SDS7102
SDS8102
± 1V(2mV～100mV)；
SDS8202
SDS8302
± 10V(200mV～1V)；
± 100V(2V～10V)
SDS9302
60MHz, 100MHz, 200MHz, 300MHz
Full bandwidth
≥5Hz (at input, AC coupling, -3dB)
SDS6062 ≤5.8ns (at input, Typical)
SDS7102 ≤3.5ns (at input, Typical)
Rise time
SDS8102 ≤3.5ns (at input, Typical)
SDS8202 ≤1.7ns (at input, Typical)
SDS8302 ≤1.17ns (at input, Typical)
SDS9302 ≤1.17ns (at input, Typical)
±3% DC accuracy
DC accuracy
(average)
Cursor
Average﹥16: ±(3% rdg + 0.05 div) for V
△ △
84
8. Technical Specifications
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
Waveform storage
Bandw idth
Lissajous figure
Phase differe nce
Frequency ( typical)
＋
, －, *, / ,FFT
15 waveforms
Full bandwidth
±3 degrees
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.
Trigger:
Performance Characteristics Instruction
Trigger level range
Internal ±6 div from the screen center
EXT ±600mV
EXT/5 ±3V
Internal ±0.3div
Trigger level
EXT ±(40mV + 6% of Set Value)
Accuracy (typical)
EXT/5 ±(200mV +6% of Set Value)
Trigger displacement
Trigger Holdoff range
According to Record length and time base
100ns~10s
50% level
Input signal frequency ≥50Hz setting(typical)
Edge trigger slope Rising, Falling
Sensitivity 0.3div
85
8. Technical Specifications
Performance Characteristics
Pulse trigger
Instruction
Trigger condition
Positive pulse：＞, ＜, ＝ negative pulse：＞, ＜, ＝
Pulse Width range 24ns～10s
Modulation
Support standard NTSC, PAL and
SECAM broadcast systems
Video Trigger
Line number range 1-525 (NTSC) and 1-625 (PAL/SECAM)
Slope Trigger
Alternate Trigger
Trigger condition
Time setting
Trigger on CH1
Trigger on CH2
Positive pulse：＞, ＜, ＝ negative pulse：＞, ＜, ＝
24ns～10s
Edge, Pulse, Video, Slope
Edge, Pulse, Video, Slope
86
8. Technical Specifications
General Technical 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 than 1MΩ of load.
Frequency (Typical ) Square wave of 1KHz voltage equal to or greater
Power
Mains Voltage 100～240 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
Environment
Temperature
Relative Humidity
Height
Cooling Method
Working temperature: 0 ℃～ 40
Storage temperature: -20 ℃～ 60
≤ 90%
Operating: 3,000 m
Non-operating: 15,000 m
Natural convection
Mechanical Specifications
Dimension
Weight
340mm× 155mm×70mm (L*H*W)
About 1.82 kilogram
Interval Period of Adjustment:
One year is recommended for the calibration interval period.
87
9. Appendix
9. Appendix
Appendix A: Enclosure
Standard Accessories:
z 2 Passive probe: 1.2 m, 1:1 (10:1) z CD: x 1 (PC link application software) z Power cord: 1pcs, up to the standards of the country in which it is used. z USB cable z User Manual: 1pcs
Options:
z Battery
Appendix B: Maintenance, Cleaning and Repairing
General Maintenance
Please don't store or put the instrument in the place where the liquid crystal display will be directly exposed to the sunlight for a long time.
Caution: The instrument or probe should not be stained with the spraying agent, liquid and solvent to avoid any damage to it.
Cleaning
Check the probe and instrument regularly according to their operating state. Clean the external surface of the instrument following the steps shown below:
1. Please 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. Please don't apply any corrosive chemical cleaning agent to prevent the instrument or probe from damage.
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.
88
9. Appendix
Appendix C: Battery Using Guide
Battery electric quantity indicating symbols include:
、 、 and
Fig.9-1 Battery power indication
Charging the oscilloscope
Connect the power cord to a power source. Turn on the Power Switch Button ― ○ on the left side (make sure the “―” side is pressed down). Yellow light of the indicator on the front panel means the battery is being charged. Once the battery is full, the indicator will become green. The lithium battery maybe not be charged when delivery. Please charge the battery for 12 hours to make sure enough power to supply to oscilloscope. The battery can supply power for 4 hours after being charged completely.
There will have battery power indication show on the top of panel when oscilloscope
power supplied by the battery (if no indication has appeared, see “Display” on P55 ).
, , and imply for different power consumption and when shows it means the power can only supply for 5 minutes maximum.
Note:
To avoid superheat of battery during charging, the environment temperature is not allowed to exceed the permissible value given in technical specification.
Replacing the Lithium Battery Unit
It is usually not required to replace the battery unit. But when it is required to replace it, only qualified personnel can carry out this operation, and only use the same specification lithium battery.
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