Rigol Technologies DS1000M, DS1000MD, DS1000C, DS1000CD User Manual

User Manual
Publication number DS1-061107 March 2006
RIGOL
DS1000CD, DS1000C, DS1000MD, DS1000M
© Copyright RIGOL Technologies, Inc. 2006 All Rights Reserved
RIGOL
z Copyright © RIGOL TECHNOLOGIES, INC. 2006 All Rights Reserved. z RIGOL products are protected by patent law in and outside of P.R. China. z Information in this publication replaces that in all previously corresponding
material.
z RIGOL Technologies, Inc. reserves the right to modify or change pat of or all the
specifications and pricing policies at company’s sole decision.
NOTE: RIGOL is registered trademark of RIGOL TECHNOLOGIES, INC.
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User Manual for DS1000 Series
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Safety Notices
Review the following safety precautions carefully before operate the instrument to avoid any personal injury or to damage the instrument and any products connected to it.
To avoid potential hazards use the instrument in a manner only as specified by this user’s guide.
The instrument should be serviced by qualified personnel only.
To Avoid Fire or Personal Injury
Use proper power cord Use only the power cord designed for your oscilloscope
and authorized in your country.
Connect and Disconnect accessories properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source
Ground the instrument This oscilloscope is grounded through the protective earthing conductor of the power cord. To avoid electric shock the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the oscilloscope ensure that the instrument is properly grounded.
Connect the probe properly. The probes’ ground terminals are at the same voltage level with earth terminal of the instrument. Do not connect the ground terminals to a high voltage.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and marks on the instrument. Follow the user’s manual for further ratings information before making connections to the instrument.
Do not operate without Covers. Do not operate your oscilloscope with covers or panels removed.
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Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Circuit or Wire Exposure. Do not touch exposed connections and
components when power is on.
Do not operate with suspected failures. If you suspect damage with this product, have it inspected by qualified service personnel before further operations.
Provide Proper Ventilation. Refer to the manual’s installation instructions for details as to the oscilloscope has proper ventilation.
Do not operate in wet/damp conditions
Do not operate in an explosive atmosphere Keep product surfaces clean and dry
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Safety Terms and Symbols Terms in This Manual. These terms may appear in this manual:
!
!
Terms on the Product: These terms may appear on the product:
DANGER indicates an injury hazard may be immediately accessible.
WARNING indicates an injury hazard may be not immediately accessible.
CAUTION indicates that a potential damage to the instrument or other property
might occur.
Symbols on the Product: These symbols may appear on the Instrument:
WARNING: Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION: Caution statements identify conditions or practices that could result in damage to this product or other property.
!
Hazardous Voltage
Refer to Instructions
Protective earth terminal
Grounding Terminal of Chassis
Test Grounding Terminal
IV © Copyright RIGOL Technologies, Inc. 2006.
User Manual for DS1000 Series
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General-Purpose Oscilloscopes
RIGOL DS1000-Series Digital Oscilloscopes offer exceptional waveform viewing
and measurements in a compact, lightweight package. The DS1000 series are ideal for production test, field service, research and design and all of the applications involving analog/digital circuits test and troubleshooting, as well as education and training.
Each of these oscilloscopes gives you: z Dual Channel, Bandwidth:
100MHz (DS1102CD, DS1102C, DS1102MD, DS1102M) 60MHz (DS1062CD, DS1062C, DS1062MD, DS1062M) 40MHz (DS1042CD, DS1042C, DS1042MD, DS1042M) 25MHz (DS1022CD, DS1022C, DS1022MD, DS1022M)
z Optional 16 digital channels (Mixed signal oscilloscope), each channel can be
turned on or off independently, or in a 8 bit group
z Mono/Color TFT LCD Displays at 320*234 resolution z USB storage and printing supports, firmware upgradeable via USB connectivity z Adjustable waveform intensity, more effective waveform viewing z One-touch automatic setup for ease of use (AUTO) z Saves 10 Waveforms, 10 setups, supports CSV and bitmap format z Newly designed Delayed Scan Function, easy to give attention to both details
and overview of a waveform
z 20 Automatic measurements z Automatic cursor tracking measurements z Waveform recorder, record and replay dynamic waveforms z User selectable fast offset calibration z Built-in FFT function, Frequency Counter z Digital filters, includes LPFHPFBPFBRF z Pass/Fail Function, optically isolated Pass/Fail output z Add, Subtract and Multiply Mathematic Functions z Advanced trigger types include: Edge, Video, Pulse width, Slope, Alternative,
Pattern and Duration (Mixed signal oscilloscope)
z Adjustable trigger sensitivity
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z Multiple Language User Interface z Pop-up menu makes it easy to read and easy to use z Built-in Chinese and English help system z Easy-to-use file system supports Chinese & English characters key-in
DS1000 Series Digital Oscilloscope accessories:
z Two 1.5 meter, 1:1 10: 1 switchable probes z Digital test set (Mixed Signal Oscilloscope only, DS1xxxxD), include
A data line (Model: FC1868) An active logic head (Model: LH1116) Twenty test wire (Model: LC1150) Twenty logic clips (Model: TC1100)
z Power cord for country of destination z User’s Manual z Warranty Card z A Ultrascope for WIN98/2000/XP software
VI © Copyright RIGOL Technologies, Inc. 2006.
User Manual for DS1000 Series
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Content
Safety Notices ................................................................................................. II
General-Purpose Oscilloscopes .......................................................................... V
CHAPTER 1: GETTING STARTED ..................................................................... 1-1
The Front Panel and the User Interface ....................................................... 1-2
To Inspect the Instrument .......................................................................... 1-6
To Perform a Functional Check .................................................................... 1-7
To Compensate Probes ............................................................................... 1-9
To Use Digital Leads (Mixed Signal Oscilloscope) ........................................ 1-10
To Display a Signal Automatically .............................................................. 1-12
To Set Up the Vertical Window .................................................................. 1-13
To Set Up the Horizontal System ............................................................... 1-15
To Trigger the Oscilloscope ....................................................................... 1-17
CHAPTER 2: OPERATING YOUR OSCILLOSCOPE .............................................. 2-1
Understand the vertical system ................................................................... 2-2
Understand the Horizontal System ............................................................. 2-30
Understand the Trigger System ................................................................. 2-36
To Set Up the Sampling System ................................................................ 2-59
To Set Up the Display System ................................................................... 2-63
To Store and Recall Waveforms or Setups .................................................. 2-65
To Set Up the Utility ................................................................................. 2-73
To Measure Automatically ......................................................................... 2-91
To measure with cursors ........................................................................... 2-98
To use run control buttons ....................................................................... 2-105
CHAPTER 3: APPLICATION & EXAMPLES ......................................................... 3-1
Example 1: Taking Simple Measurements ..................................................... 3-1
Example 2: View a signal delay caused by a circuit ....................................... 3-2
Example 3: Capture a Single-Shot Signal ...................................................... 3-3
Example 4: To reduce the random noise on a signal ...................................... 3-4
Example 5: Making Cursor Measurements .................................................... 3-6
Example 6: The application of the X-Y operation ........................................... 3-8
Example 7: Triggering on a Video Signal .................................................... 3-10
Example 8: FFT Cursor measurement ........................................................ 3-12
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Example 9: Pass/Fail Test .......................................................................... 3-13
Example 10: Triggering on a Digital Signal…………………………………………….….3-14
CHAPTER 4: PROMPT MESSAGES & TROUBLESHOOTING ................................. 4-1
Prompting Message .................................................................................... 4-1
Troubleshooting .......................................................................................... 4-3
CHAPTER 5: SUPPORT & SERVICE .................................................................. 5-1
CHAPTER 6: APPENDIX .................................................................................. 6-1
Appendix A: Specifications .......................................................................... 6-1
Apendix B: DS1000-Series Accessories ......................................................... 6-7
Appendix C: General Care and Cleaning ....................................................... 6-8
Index ................................................................................................................ i
VIII © Copyright RIGOL Technologies, Inc. 2006.
User Manual for DS1000 Series
Chapter 1 : Getting Started
This chapter covers the following topics:
The front panel and user interface
To inspect the instrument
To perform a functional check
To compensate probes
To use digital leads (Mixed signal oscilloscope only)
To display a signal automatically
To set up the vertical system
To set up the horizontal system
To trigger the oscilloscope
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User Manual for DS1000 Series
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The Front Panel and the User Interface
One of the first things you will want to do with your new oscilloscope is to become acquainted with its front panel. This chapter will help you be familiar with the layout of the knobs and keys and how to use them. Read the chapter carefully before further operations.
The front panel has knobs and buttons. The knobs are used most often and are similar to the knobs on other oscilloscopes. The buttons not only let you use some of the functions directly but also bring up soft button menus on the screen, which allow you access to many measurement features associated with advanced functionalities, math, and reference or run control features.
Figure1-1
DS1000-Series Oscilloscope’s Front Panel
DS1000 series oscilloscopes provide an easy-to-use user interface, the definitions of the buttons and the knobs are as follows:
Menu buttons: Associated with Measure, Cursor, Acquire, Display, Storage, and
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Utility menus.
Vertical buttons: Associated with CH1, CH2, MATH, REF and LA menus, the OFF
button can set waveform or menu which currently active off.
Horizontal buttons: Associated with horizontal MENU. Trigger buttons: Associated with trigger MENU, instant action to set 50% trigger
level and FORCE trigger.
Action buttons: Include run control buttons for AUTO and RUN/STOP.
Function buttons: Five grey buttons from top to bottom on the right to the LCD
screen, which set choices of operation in the currently active menu.
Knobs: For the adjustment of vertical or horizontal
,
and trigger .
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Figure 1-2
Front Panel Controls
Character definitions in this User’s Manual
Throughout this book, character figures of buttons and knobs are the same to those on front-panel. A box around the name of the key denotes MENU function buttons on front-panel, such as Measure. denotes the multi-function knob .
denotes the two POSITION knobs.
denotes the two SCALE knobs.
denotes the LEVEL knob. The name with a drop shadow denotes the menu operating key, such as WAVEFORM soft key in STORAGE menu.
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Channel 1
Channel 2
Running status
Running status
Location of waveform window in memory
Trigger point in memory
Figure1-3
Display screenAnalog channels only
Digital channel turned off
Digital channels turned on
Trigger point in waveform window
Menu
Waveform display window
Channel 1
Digital channels
Channel coupling and vertical div.
Horizontal time base div.
Trigger offset
Figure 1-4
User InterfaceAnalog and Digital channels
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To Inspect the Instrument
After you get a new DS1000 series oscilloscope, please inspect the instrument according to the following steps:
1. Inspect the shipping container for damage.
Keep a damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically.
2. Check the accessories.
Accessories supplied with the instrument are listed in "Accessories" in this manual.
If the contents are incomplete or damaged notify your RIGOL Sales Representative.
3. Inspect the instrument.
In case any mechanical damage or defect, or if the instrument does not operate properly or pass performance tests, notify your RIGOL Sales Representative.
If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as your RIGOL sales office. Keep the shipping materials for the carrier’s inspection. RIGOL offices will arrange for repair or replacement at RIGOL’s option without waiting for claim settlement.
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To Perform a Functional Check
Perform this quick functional check to verify that your instrument is operating correctly.
1. Turn on the instrument.
Use only power cords designed for your oscilloscope. Use a power source that delivers 100 to 240 VAC the display shows the waveform window. Push the Storage the top menu box and push the Factory menu box.
Power button
, 45Hz to 440Hz. Turn on the instruments, and wait until
RMS
button, select Storage in
Storage button
Figure 1-5
WARNNING:
!
To avoid electric shock, be sure the oscilloscope is properly grounded.
2Input a signal to a channel of the oscilloscope Set the switch on the probe to 10X and connect the probe to channel 1 on the
oscilloscope. To do this, align the slot in the probe connector with the key on the CH 1 BNC, push to connect, and twist to the right to lock the probe in place.
Attach the probe tip and ground lead to the PROBE COMP connector.
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Probe compensator
Figure 1-6
Set the probe attenuation to 10X. To do this, push CH1Probe10X.
Probe scale
Figure 1-7 Figure 1-8
Push the AUTO button. Within a few seconds, you could see a square wave in the
display (approximately 1 kHz 3 V peak- to- peak).
Push the OFF button or push the CH1 button again to turn off channel 1,
push the CH2 button to turn on channel 2, repeat steps 2 and 3.
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To Compensate Probes
Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a probe for the first time to any input channel.
1. Set the Probe menu attenuation to 10X. Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope. If you use the probe hook-tip, ensure a proper connection by firmly inserting the tip onto the probe. Attach the probe tip to the PROBE COMP connector and the reference lead to the PROBE COMP Ground connector, turn on channel 1, and then press AUTO.
2. Check the shape of the displayed waveform.
Over compensated Correctly Compensated Under Compensated
Figure 1-9
Figure 1-9
3. If necessary, use a non-metallic tool to adjust the trimmer capacitor on the probe
for the flattest square wave possible as displayed on the oscilloscope.
4. Repeat as necessary.
WARNNING: To avoid electric shock while using the probe, be sure the
!
perfection of the insulated cable, and do not touch the metallic portions of the probe head while it is connected with a voltage source.
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To Use Digital Leads (Mixed Signal Oscilloscope)
1. Switch off power supply of the Device Under Test if necessary to avoid short
circuit. Since no voltage is applied to the leads at this step, you may keep the
oscilloscope on.
2. Connect one end of the flat cable FC1868 to the Logic Analyzer Input, connect
the other end to Logic Head LH1116. An identifier is located on each end of the
flat cable, it can only be connected in one way. It is unnecessary to switch off
power supply of your oscilloscope connect the cable.
Figure 1-10
CAUTIONUse only FC1868, LH1116, TC1100 and LC1150 made by
!
RIGOL for specified mixed signal oscilloscopes.
1-10 © Copyright RIGOL Technologies, Inc. 2006.
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3. Connect a test clip to one lead wire; make sure it’s connected well.
Test cl ip
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Figure 1-11
4. Test your device with the clip.
Figure 1-12
5. Remember to connect Ground Channel to the DUT’s ground terminal.
GND
Figure 1-13
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To Display a Signal Automatically
The oscilloscope has an Auto feature that sets up the oscilloscope automatically to display the input signal in a best fit. This Auto feature requires the input signal with a frequency of 50 Hz or higher and a duty cycle greater than 1%.
When you press the AUTO button, the oscilloscope automatically sets up vertical, horizontal and Trigger controls to display the input signal in the screen for view. You may want to adjust the controls manually if necessary to get the best results.
DS1000 series are two-channel oscilloscopes with an external trigger input. In this exercise you connect a signal to the channel 1 input.
1. Connect a signal to the oscilloscope.
2. Press AUTO.
When you press the AUTO button, the oscilloscope may change the current settings to display the signal. It automatically adjusts the vertical and horizontal scaling, as well as the trigger coupling, type, position, slope, level, and mode settings.
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To Set Up the Vertical Window
Figure 1-14 shows the Channels, MATH, REF, Logic Analyzer and OFF buttons and vertical through the vertical buttons, knobs, and status bar. It will help you be familiar with the setting of the vertical parameters.
, knobs. The following exercise guides you
Figure 1-14
1. Center the signal on the display with the
knob.
The as you turn the
knob moves the signal vertically, and it is calibrated. Notice that
knob, a voltage value is displayed for a short time indicating how far the ground reference is located from the center of the screen. Also notice that the ground symbol on the left side of the display moves in conjunction with the
knob.
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Measurement hints
If the channel is DC coupled, you can quickly measure the DC component of the signal by simply noting its distance from the ground symbol.
If the channel is AC coupled, the DC component of the signal is blocked, allowing you to use greater sensitivity to display the AC component of the signal.
Vertical offset back to 0 shortcut key
Turn the channel and press the
knob to change the vertical display position of
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 setup and notice that each change affects the status bar differently.
You can quickly determine the vertical setup from the status bar in the display. z Change the vertical sensitivity with the
knob and notice that it
causes the status bar to change.
z Press CH1. z A soft button menu appears on the display, and the channel turns on (or remains
on if it was already turned on).
z Toggle each of the soft buttons and notice which button cause the status bar to
change. Channel 1 and 2 have a vernier soft button that allows the knob to change the vertical step size in smaller increments. To press Volts/Div soft button, you can change the step size into Fine or Coarse status.
z Press OFF button to turn the channel off.
Coarse/Fine Shortcut key
You can set the Coarse/Fine vertical control not only on the Volts/Div item in the CH1 or CH2 menus, but also by simply pressing the vertical knob.
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To Set Up the Horizontal System
Figure 1-15 shows the MENU button, and knobs of horizontal system. The following exercise guides you through these buttons, knobs, and status bar.
Figure 1-15
1. Turn the
knob and notice the change it makes to the status
bar.
The horizontal
knob changes the sweep speed in a 1-2-5 step sequence, and the value is displayed in the status bar. The time base ranges of the DS1000 series are listed as follows. The horizontal scan speed is from 5ns/div* to 50s/div.
* NOTE: The speed of horizontal scan varies by different models.
Delayed Scan Shortcut key
To press the
knob in the horizontal control area on the front-panel
is another way to enter or exit Delayed Scan mode and it is equal to the following menu operations, MENUDelayed.
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2. The horizontal
knob moves displayed signal horizontally
on waveform window
Horizontal offset back to 0 shortcut key
Press the
knob to set the horizontal offset to 0 as a shortcut key, this is especially helpful when the trigger point is far out of the screen and want it to get back to the screen center immediately.
3. Press the MENU key to display the TIME menu.
In this menu, you can enter or exit the Delayed Scan mode, set the display to Y-T, X-Y or ROLL mode, and turn the horizontal
knob to adjust trigger offset.
Horizontal position control
Trig-Offset: In this setting, the trigger position will be changed horizontally
when you turn the
knob.
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To Trigger the Oscilloscope
Figure 1-16 shows the trigger control area on the front panel, it has a trigger level knob and three soft buttons. The following exercise guides you through these trigger buttons, knobs, and status bar.
Figure 1-16
1. Turn the trigger Level knob and notice the changes it makes to the display.
On the DS1000 series oscilloscopes, as you turn the
knob or press the 50% menu button, two things happen on the display for a short time. First, the trigger level value is displayed at the bottom-left of the screen. If the trigger is DC coupled, it is displayed as a voltage value. If the trigger is AC coupled or LF reject, it is displayed as a percentage of the trigger range. Second, a line is displayed showing the location of the trigger level (as long as AC coupling or low frequency reject are not selected).
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Trigger Level to 0 Shortcut key
Turn the
knob to change trigger level value and press the
knob to set trigger level back to 0 as a shortcut key.
2. Change the trigger setup and notice these changes affect the status bar differently.
· Press MENU button in the trigger control area. A soft button menu appears on the display showing the trigger setting choices. Figure 1-17 displays this trigger menu.
· Press the trigger Mode button and choose Edge.
· Press the trigger Source button to select CH1.
· Press the trigger Slope button to choose Rising Edge.
· Press the trigger Sweep button to select Auto.
· Press the trigger Set Up button to enter secondary menu.
Figure 1-17
NOTE: The trigger type, slope and source change in conjunction with the status bar on the top-right of the screen.
3. Press 50%
This key is an action button. Every time you press the 50% button, the oscilloscope sets the trigger level to the center of the signal.
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4. Press FORCE
Press this button starts an acquisition regardless of an adequate trigger signal, usually used in “Normal” or ”Single” trigger mode. This button has no effect if the acquisition is already stopped.
Key point:
Holdoff: A time interval before the oscilloscope response 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
Holdoff time.
knob, then turn it to adjust
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Chapter 2 : Operating Your Oscilloscope
By now you have got a brief understanding of DS1000 series with the VERTICAL, HORIZONTAL, and TRIGGER groups of the front-panel buttons. You should also know how to determine the setup of the oscilloscope by viewing the status bar. This chapter takes you through all groups of front-panel buttons, knobs, and menus. You will also further your knowledge of the operation hints by reading this guide. We recommend you perform all of the following exercises so that you could get the most out of the powerful measurement capabilities of your oscilloscope.
This chapter covers the following topics:
Understand the vertical system ( CH1CH2MATHREFLAMixed
Signal Oscilloscope)、OFF 、
Vertical Vertical
Understand the horizontal system(MENUHorizontal
Horizontal
Understand the trigger system
To set up the sampling system (Acquire)
To set up the display system (Display)
To save and recall waveforms, CSV format, bmp format and other setups
Storage
To set up utility (Utility)
To measure automatically (Measure)
To measure with cursors (Cursor)
To use run control buttons (AUTO、RUN/STOP)
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MENU50%FORCE
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Understand the vertical system
. Settings of the channels
Each channel of DS1000 has an operation menu and it will pop up after pressing CH1 or CH2 button. The settings of all items in the menu are shown in the table below.
Figure 2-1 Table2-1
Menu Settings Comments
Blocks the DC component of the input Signal Passes both AC and DC components of the input signal Disconnects the input signal
Limits the channel bandwidth to 20MHz to reduce display noise. Get full bandwidth.
Set this to match your probe attenuation factor to make the vertical scale readout correct
Setup digital filter(See table 2-4)
Coupling
BW Limit
Probe
Digital filter
AC
DC
GND
ON
OFF
1X 10X 100X 1000X
Go to the next menu page( The
1/2
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followings are the same, no more explanation
Figure 2-2 Table2-2
Menu Settings Comments
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2/2
Back to the previous menu page (The followings are the same, no more explanation
Selects the resolution of the
knob Defines a 1-2-5 sequence. To change the resolution to small steps between the coarse settings.
Turn on the invert function. Restore to original display of the
Volts/Div
Invert
Coarse
Fine
ON OFF
waveform.
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1. Channel coupling
To use CH1 as an example, input a sine wave signal with DC shift
Press CH1CouplingAC to set CH1’s coupling as “AC”. In this setting, it blocks the DC component of the input signal.
The waveform is displayed as Figure 2-3:
AC coupling setup
AC coupling status symbol
Figure 2-3
Press CH1CouplingDC, to set CH1’s coupling as “DC”. In this setting, it passes both AC and DC components of the input signal.
The waveform is displayed as Figure 2-4:
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DC coupling setup
DC coupling status symbol
Figure 2-4
Press CH1CouplingGND, to set CH1’s coupling as “GND”. In this setting, it disconnects the input signal.
The screen displays as Figure 2-5:
GND coupling setup
GND coupling status symbol
Figure 2-5
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2. Set up the channel bandwidth limit
To use CH1 as an example, input a signal that contains high frequency component. Press CH1BW LimitOFF , to set up bandwidth limit to “OFF” status. The oscilloscope is set to full bandwidth and the high frequency component in the signal will pass. The waveform is displayed as Figure 2-6:
Figure 2-6
Turn off the BW limit
Press CH1BW Limit→ON, to set up bandwidth limit to “ON” status. It will reject the frequency component higher than 20MHz.
The waveform is displayed as Figure 2-7:
Figure 2-7
20M BW limit
Mark of BW limit
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3. Probe Attenuation Setting
When using a probe, the oscilloscope allows you to select the attenuation factor for the probe. The attenuation factor changes the vertical scaling of the oscilloscope so that the measurement results reflect the actual voltage levels at the probe tip. To change (or check) the probe attenuation setting, press the CH1 or CH2 button (according to which channel you are using), toggle the Probe soft button to change the attenuation factor to match the probe you are using. This setting remains in effect until changed again.
Figure 2-8 gives an example for using a 1000:1 probe and its attenuation factor.
Probe attenuation
Vertical volt/div.
Figure 2-8
Table 2-3
Probe attenuation factors
1:1 1X
Corresponding settings
10:1 10X
100:1 100X
1000:1 1000X
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g
4. Volts/Div settings
The Volts/Div control has Coarse or Fine configuration. The Vertical Sensitivity is
2mv—5V/div.
Coarse: It is the default setting of Volts/Div, and it makes the vertical scaling in a
1-2-5-step sequence from 2mV/div, 5mV/div, 10mV, to 5 V/div.
Fine: This setting changes the vertical scale to small steps between the coarse
settings. It will be helpful when you need to adjust the waveform’s vertical size in smooth steps
Fine adjustment data
Figure 2-9
Coarse/Fine Shortcut key:
To change Coarse/Fine setting, not only by menu but also by pressin
knob
Fine adjustment
vertical
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5. To invert a waveform
Invert turns the displayed waveform 180 degrees, as respect to the ground level. When the oscilloscope is triggered on the inverted signal, the trigger is also inverted.
Figure 2-10 and 2-11 show the changes after inversion.
Invert off
The waveform before inversion
Figure 2-10
Invert on
The waveform after inversion
Figure 2-11
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Digital Filter:
Press CH1Digital filter, display the digital filter menu. Turn ) knob to set high and low limit of frequency.
Figure 2-12
Figure 2-13
Turn off digital filter
Turn on digital
filter
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Mark of digital filter
User Manual for DS1000 Series
Figure 2-14 Table 2-4
Menu Settings Comments
RIGOL
Digital Filter
On Off
Turn on the digital filter Turn off the digital filter
Setup as LPF (Low Pass Filter) Setup as HPF(High Pass Filter)
Filter Type
Setup as BPF (Band Pass Filter) Setup as BRF(Band Reject Filter)
Upper limit
Lower limit
<frequency>
<frequency>
Turn
Turn
knob to set high limit
knob to set low limit
Back to higher level menu(The followings are the same, no more explanation
© Copyright RIGOL Technologies, Inc. 2006. 2-11
User Manual for DS1000 Series
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. Math functions
The mathematic functions include “add”, “subtract”, “multiply” and “FFT” for CH1 and CH2. The mathematic result can also be measured by grid and cursor.
MATH scale
Figure 2-16 Table 2-5
Menu Settings Comments
Operation
Source A
Source B
Invert
A+B
A-B
A×B
FFT CH1 CH2 CH1 CH2
ON
OFF
Figure 2-15
Add source A and source B Subtract source B from source A Multiply source B by source A Fast Fourier Transform
Define CH1 or CH2 as source A
Define CH1 or CH2 as source B
Invert the MATH waveform. Restore to original waveform display.
2-12 © Copyright RIGOL Technologies, Inc. 2006.
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I. Using the FFT
The FFT (Fast Fourier Transform) process mathematically converts a time-domain signal into its frequency components. FFT waveforms are useful in the following applications:
z Measuring harmonic content and distortion in systems z Characterizing noise in DC power supplies z Analyzing vibration
Figure 2-17 Table2-6
Menu Settings Comments
Operate
Source
Window
Display
A+B A- B AxB FFT
CH1 CH2
Rectangle Hanning Hamming Blackman
Split
Full screen
Add source A to source B Subtract source B from source A Multiply source B by source A Fast Fourier Transform
Define CH1 or CH2 as FFT source
Select window for FFT
Display FFT waveform on half screen
Display FFT waveform on full screen
Scale
Vrms dBVrms
Set “Vrms ” as vertical unit Set “dBVrms ” as vertical unit
© Copyright RIGOL Technologies, Inc. 2006. 2-13
User Manual for DS1000 Series
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Key points for FFT
1 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.
2 To reduce random noise and aliases components in repetitive or
single-shot events, set the oscilloscope acquisition mode to average.
3 To display FFT waveforms with a large dynamic range, use the dBVrms
scale. The dBVrms scale displays component magnitudes using a log scale.
2-14 © Copyright RIGOL Technologies, Inc. 2006.
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Selecting an FFT Window
DS1000 series oscilloscopes provide four FFT windows. Each window is a trade-off between frequency resolution and amplitude accuracy. What you want to measure and your source signals characteristics help determine which window to use. Use the following guidelines to select the best window.
Tab le 2-7
Window
Rectangle
Hanning Hamming
Blackman
Features
Best frequency resolution and worst magnitude resolution. This is essentially the same as no window.
Best for measuring Transients or bursts,the signal levels before and after the event are nearly equal. Equal-amplitude sine waves with fixed frequencies. Broadband random noise with a relatively slow varying spectrum.
Better frequency, poorer magnitude accuracy than Rectangular. Hamming has slightly better frequency resolution than
Sine, periodic, and narrow-band random noise. Transients or bursts where the signal levels before and after the events are significantly different.
Hanning.
Best magnitude, worst frequency resolution.
Single frequency waveforms, to Find higher order harmonics.
Key points: FFT Resolution: the quotient between sampling rate and number of FFT
points. With a fixed FFT points, the lower sampling rate results in better resolution.
Nyquist Frequency
The highest frequency that any real-time digitizing oscilloscope can acquire without aliasing. It’s normally half of the sample rate. This frequency is called the Nyquist frequency. Frequency above the Nyquist frequency will be under sampled, causing a situation known as aliasing.
© Copyright RIGOL Technologies, Inc. 2006. 2-15
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II. Using REF
Reference Waveforms are saved waveforms to be selected for display. The reference function will be available after saving the selected waveform to non-volatile memory.
Press REF button to display reference waveform menu.
Figure 2-18 Table2-8 when using internal memory
Menu Settings Comments
CH1
CH2
Select channel1 as REF channel
Select channel2 as REF channel
Source
Location
Save Save REF waveform
Imp./Exp. Go to import/export menu(see table 2-10)
Reset Reset REF waveform
Figure 2-19 Table 2-9 when using external memory
Menu Settings Comments
Source
MATH/FFT
LA
Internal External
CH1
CH2
MATH/FFT
LA
Select Math/FFT as REF channel
Select LA as REF channel( Mixed Signal Oscilloscope)
Select memory location in scope Select memory location out scope
Select channel1 as REF channel
Select channel2 as REF channel
Select Math/FFT as REF channel
Select LA as REF channel( Mixed Signal Oscilloscope)
Location
Save
Import Go to import menu(see table 2-14)
Reset Reset REF waveform
Internal External
Select memory location in scope Select memory location out scope
Save REF waveform to outer memory location
2-16 © Copyright RIGOL Technologies, Inc. 2006.
User Manual for DS1000 Series
Import and Export
Press REF Imp./Exp. and go to the following menu.
Figure 2-20
Table 2-10
Menu Settings Comments
Path
Explorer
Export
Import Import the REF file to internal memory
Directory File
Switch to Path, directory or file
Export the REF file from internal memory to export memory (see table 2-11)
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Delete File
Delete file
The figure of import and export as following
Figure 2-21
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Export
Press REF →Imp./Exp. → Export and go to the following menu.
Figure 2-22
The figure of export as following.
Table 2-11
Menu Settings Comments
Move the cursor up
Move the cursor down
To delete chosen letter
Save Execute the operation
Figure 2-23
2-18 © Copyright RIGOL Technologies, Inc. 2006.
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Save to External Memory
Press REF Save and go to the following menu.
Figure 2-24
The figure of Save as following:
Table 2-12
Menu Settings Comments
Explorer
New File (Folder)
Delete File(Folder)
Path Directory File
Delete file(Folder)
Switch among Path, Directory and File
Set up new file in Path and File. Set up new folder in directory.
RIGOL
Figure 2-25
© Copyright RIGOL Technologies, Inc. 2006. 2-19
User Manual for DS1000 Series
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New File (or New Folder)
Press REF →Save→New File (or New Folder) and go to the following menu.
Figure 2-26
The figure of key in as following
File name key in
Table 2-13
Menu Settings Comments
Move the cursor up
Move the cursor down
To delete chosen letter
Save Execute the operation
Spell key in
Character window
Switch Chinese/English
Switch Capital on/off
Figure 2-27
2-20 © Copyright RIGOL Technologies, Inc. 2006.
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Import
Press REF Import and go to the following menu.
Figure 2-28
The figure of import as following.
Table 2-14
Menu Settings Comments
Explorer
Import
Path Directory File
Switch among Path, Directory and File
Import the REF file into internal memory
RIGOL
Figure 2-29
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Displaying a Reference Waveform.
Figure 2-30
1. Push REF button to show the reference waveform menu.
2. Press soft button 1 to select CH1, CH2, MATH, FFT or LA ( Mixed Signal
Oscilloscope) to choose the REF channel you want.
3. Turn vertical
and vertical to adjust the REF waveform
to a suitable position.
4. Select the save location of REF waveform by press soft button No. 2.
5. Save the waveform being displayed on the screen as REF by press soft button
No.3.
NOTE:
The reference function is not available in X-Y mode.
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III. Set up LA channel (mixed signal oscilloscope)
Single channel or group channels can be chosen ON or OFF, and also can set the size of waveform. Change display location of digital channel on screen and select threshold style.
Press LA function button and go to the following menu.
Figure 2-31 Table 2-15
Menu Settings Comments
D7-D0 Set up channel group D7-D0 (see table 2-16)
D15-D8 set up channel group D15-D8 (see 2-17)
Current
Threshold
<D15-D0>
TTL
CMOS
ECL
User
Select channel by turning
knob
Select mode of whole digital channels. The threshold voltage can set by user when in user-defined style.
user
<Threshold
Set threshold voltage by turning
knob.
Voltage>
1. Display and re-line up the digital channels
(1) Press LA D7-D0 or D15-D8 and go to the group channel setting menu. Turn
on or turn off the display of the digital channels.
(2) Press LA current and choose digital channel by turning
knob. The
chosen channel will be shown in red (Color LCD).
(3) Turn vertical
knob to re-position the channel in screen.
The figure of menu shows as follow.
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Running channel
Select running channel
Figure 2-32
2. Set threshold mode of digital channels
Press LA Threshold, select logic standard or User to define your own threshold voltage.
The figure of menu shows as follow.
Setup threshold
Setup data of threshold by user
Figure 2-33
2-24 © Copyright RIGOL Technologies, Inc. 2006.
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Threshold explanation
LOGIC STANDARD THRESHOULD VLOTAGE
TTL 1.4V
CMOS 2.5V
ECL -1.3V
User -8V to +8V
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Set up Cannel Group
Press LA D7-D0 or D15-D8, turn on/off the channel single, or in a group. Also you can change the size of waveforms in 8 bits as a group. See table 2-16 and 2-17
Figure 2-34 Table 2-16
Menu Settings Comments
channel D7-D0 Turn on or off single channel of D7-D0
D7-D0
Size
Reset Reset waveform of channel D7-D0
Figure 2-35 Table 2-17
Menu Settings Comments
channel D15-D8 Turn on or off single channel of D15-D8
D15-D8
Size
Reset Reset waveform of channel D15-D8
Turn on Turn off
Turn on Turn off
Turn on or off all 8 channels together
Display 8 channels in a single screen Display 16 channels in a single screen
Turn on or off 8 channels together
Display 8 channels in a single screen Display 16 channels in a single screen
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1. Turn on or off a single logic channel
press LA D7-D0 Channel , and choose the wanted channel by turning knob. Press No. 1 soft button or push down knob to turn on /off the channel. When the channel is on, we can see the mark shown as
.
. When the channel is off, the mark
As figure 2-36 shows.
On-off channels
Channel list and status of on-off
Figure 2-36
2. Force turn on or off all logic channels
Press LA D7-D0 D7-D0 Turn On / Turn Off (or D15-D8 D15-D8 →Turn On / Turn Off) will force to turn all the channels on/off. If you want to turn on/off any single channel instead, select the Channel by turning soft button or
knob.
knob, then press No. 1
3Set up the viewing size of logic channels Press LA D7-D0 Size or D15-D8 Size to select wave size of logic channels. Select
to view 8 channels on the screen;Select to view all of the 16
channels on the screen.
4Reset the logic channels display
Press LA D7-D0 Reset or D15-D8 Reset to reset the display of logic channels.
© Copyright RIGOL Technologies, Inc. 2006. 2-27
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IV. Turn on/off channels
The CH1, CH2, Ext. Trigger and LA (Mixed Signal Oscilloscope) channels on DS1000
series are input channels. All functionalities applied will be based on operating the
instrument with channels. So MATH and REF can be regarded as relatively isolated
channels.
To turn on/off any one of the channels, press the corresponding button on the front
panel. The key backlight indicates the channel is currently active. Press the button
again to turn the channel off. Or when channel is currently selected, press OFF will
turn the channel off as well, and the key backlight also goes off.
Table 2-18
Channel Mode Settings
ON
Channel 1(CH1)
Channel 2(CH2)
MATH
Selected OFF
ON Selected OFF
ON Selected OFF
DS1000 MONO DS1000 COLOR
CH1 ( black letter)
CH1 white letter
No indicator
CH 2 ( black letter)
CH2 white letter
No indicator
Math (black letter)
Math (white letter)
No indicator
Status Indicator
CH1 black letter
CH1 ( yellow letter)
No indicator CH2 black letter
CH2 ( blue letter)
No indicator
Math (black letter)
Math (purple letter)
No indicator
Note:
The status indicators of the DS1000 Mono series in the above table are displayed when the Screen is set as Normal. The channel status symbol is displayed at the lower-left of the screen. Pressing LA will turn all the digital channels on/off
2-28 © Copyright RIGOL Technologies, Inc. 2006.
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V. Using Vertical and
RIGOL
You can use the vertical controls to display waveforms, adjust vertical
, and set input parameters.
1. Using vertical
The vertical
knob.
can change the position of waveforms in all channels (including MATH, REF and LA). The resolution of the knob changes according to the change of the vertical level (The digital channels of Mixed Signal Oscilloscope changes according to the changes of the waveforms displayed). Pressing this knob will clear the channel offset to zero. (Exclude digital channels in the Mixed Signal Oscilloscope)
1. Using vertical
The vertical
knob.
can change the vertical sensitivity of waveforms in all channels (including MATH and REF, excluding LA). If the Volts/Div is set to “Coarse”, the waveform scales in a 1-2-5 step sequence from 2 mV to 5 V. If the Volts/Div is set to “Fine”, it scales to small steps between the coarse settings.
and
3. Channels can be adjusted by the vertical
and only when
they are selected.
4. When you change the vertical position, the position message is displayed on the left bottom of the screen, in the same color as the corresponding channel. The unit is V (Volts).
© Copyright RIGOL Technologies, Inc. 2006. 2-29
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Understand the Horizontal System
The oscilloscope shows the time per division in the scale readout. Since all active waveforms use the same time base, the oscilloscope only displays one value for all the active channels, except when you use Delayed Scan, or Alternative Trigger.
The horizontal controls can change the horizontal scale and position of waveforms. The horizontal center of the screen is the time reference for waveforms. Changing the horizontal scale causes the waveform to expand or contract about the screen center.
Horizontal position changes the displayed waveform position, relative to the trigger point.
The Horizontal Knobs
: The horizontal knob adjusts the horizontal position of
all channel (include Math) waveforms. The resolution of this control varies with the time base. Pressing this button clears trigger offset and moves the trigger point to the horizontal center of the screen.
: Use to select the horizontal time/div (scale factor) for the
main or the Delayed Scan time base. When Delayed Scan is enabled, it changes the width of the window zone by changing the Delayed Scan time base.
Horizontal Menu.
Press the horizontal MENU button to display the horizontal menu. The settings of this menu are listed in the following table.
2-30 © Copyright RIGOL Technologies, Inc. 2006.
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Figure 2-37 Table 2-19
Menu Settings Comments
Delayed
Time Base
Trig-offset Reset Adjust to the center
ON OFF
Y-T
X-Y
Roll
①②
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Turn on Delayed Scan mode Turn off the Delayed Scan mode
Show the relative relation between vertical voltage and horizontal time. Show CH1 value at X axis; CH2 value at Y axis. In Roll Mode, the waveform display updates from right to left.
④⑤
Figure 2-38: Status bar and mark for Horizontal control
© Copyright RIGOL Technologies, Inc. 2006. 2-31
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T
Marks Indicator
The mark represents the current waveform window’s position in the memory.
This mark displays the trigger position in the memory.
This mark displays the trigger position in the current waveform windows.
Status bar displays the horizontal time base (main time base).
Status bar displays the trigger’s horizontal offset according to the center of the
window.
Key Points
Y-T:
he conventional oscilloscope display format. It shows the voltage of a waveform record (on the vertical axis) as it varies over time (on the horizontal axis).
X-Y: XY format displays channel 1 in the horizontal axis and channel 2 in the
vertical axis.
Roll Mode: In this mode, the waveform display rolls from right to left. No trigger
or horizontal offset control of waveforms is available during Roll Mode, and it’s only available when set to 500 ms/div or slower.
Slow Scan Mode: This mode is available when the horizontal time base is set to
50ms or slower. In this mode, the oscilloscope acquires sufficient data for the left part to the trigger point, then wait for trigger, when trigger occurs, it continue to draw the rest part from the trigger point to the end of the right side. When choosing this mode to view low frequency signals, it is recommended that the channel coupling be set as DC.
Time/Div: Horizontal scale. If the waveform acquisition is stopped (using the
RUN/STOP button), the Time/Div control expands or compresses the waveform.
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Delayed Scan:
The Delayed Scan is a magnified portion of the main waveform window. You can use Delayed Scan to locate and horizontally expand part of the main waveform window for a more detailed (higher horizontal resolution) analysis of signal. Use Delayed Scan to expand a segment of a waveform to see more details. The Delayed Scan time base setting cannot be set slower than the Main time base setting.
Time base of Delayed Scan
Waveform to be horizontally expanded
Expanded waveform in horizontal
Main timebase
Figure 2-39: Delayed Scan window
The following steps show you how to use Delayed Scan.
1. Connect a signal to the oscilloscope and obtain a stable display.
2. Press horizontal MENU Delayed ON or press horizontal knob to
enter Delayed Scan mode.
The screen is divided into two parts. The upper half displays the main waveform
window and the lower half displays an expanded portion of the main waveform
window. This expanded portion of the main window is called the Delayed Scan
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window. Two blocks shadow the upper half; the un-shadowed portion is expanded in
the lower half. The horizontal
and knobs control the size
and position of the Delayed Scan. The symbol at bottom of the screen means the
main time base and the symbol on the center bottom means the Delayed Scan time.
z Use the horizontal
knob to change the position of the expanded
portion.
z Turn the horizontal
knob to adjust the Delayed Scan resolution.
z To change the main time base, you must turn off the Delayed Scan mode.
z Since both the main and Delayed Scan are displayed; there are half as many
vertical divisions so the vertical scaling is doubled. Notice the changes in the status bar.
Delayed Scan Shortcut Key: Delayed Scan function can be activated not only by menu but also by pressing horizontal
knob.
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X-Y Format
This format is useful for studying phase relationships between two signals.
Channel 1 in the horizontal axis(X) and channel 2 in the vertical axis(Y), the oscilloscope uses a none-trigger acquisition mode, data is displayed as dots. .
Figure 2-40: X-Y display format
The following modes or functions will not work in X-Y format.
z LA Function (Mixed Signal Oscilloscope)
z Automatic Measurements
z Cursor Measurements
z REF and MATH Operations
z Delayed Scan Mode
z Vector Display Mode
z Horizontal
knob
z Trigger Controls
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Understand the Trigger System
The trigger determines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, it can convert unstable displays or blank screens into meaningful waveforms.
When the oscilloscope starts to acquire a waveform, it collects enough data so that it can draw the waveform to the left of the trigger point. The oscilloscope continues to acquire data while waiting for the trigger condition to occur. After it detects a trigger, the oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point.
The trigger control area on the front panel includes a knob and three buttons:
: 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
MENU: The button that activates the trigger controls menu.
Figure 2-41: Trigger controls
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Trigger Modes
The oscilloscope provides seven trigger modes: Edge, Pulse, Slope, Video, Alternative, Pattern (only for mixed signal oscilloscopes) and Duration trigger (only for mixed signal oscilloscopes).
Edge: An edge trigger occurs when the trigger input passes through a specified
voltage level in the specified slope direction.
Pulse: Use this trigger type to catch pulses with certain pulse width.
Video: Use video trigger on fields or lines for standard video signals.
Slope: The oscilloscope begins to trigger according to the signal rising or falling
speed.
Alternative: Trigger on non-synchronized signals
Pattern: To Trigger through detecting a specified code.
Duration: To trigger within a specified time on the conditions of a specified code
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Settings for Edge Trigger
An edge trigger determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal. Select Edge trigger Mode to trigger on Rising edge, falling edge or rising & falling edge.
Figure 2-42 Table 2-20
Menu Settings Comments
Select CH1 as trigger signal Select CH2 as trigger signal Select EXT TRIG as trigger signal Select attenuated EXT TRIG/5 as trigger signal Select power line as trigger signal Select a digital channel in D15-D0 as trigger source( Only in mixed signal oscilloscopes)
Trigger on rising edge Trigger on falling edge Trigger on both ring & falling edge
Acquire waveform even no trigger occurred Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform then stop
Source
Slope
Sweep
CH1 CH2 EXT EXT/5
AC Line D15-D0
Rising Falling
Rising & Falling
Auto
Normal
Single
Set up To go to Set Up menu, see table 2-38
2-38 © Copyright RIGOL Technologies, Inc. 2006.
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gg
Settings for Pulse Width Trigger
Pulse trigger occurs according to the width of pulse. The abnormal signals can be detected through setting up the pulse width condition.
Figure 2-43 Table 2-21
Menu Settings Comments
Source
When
CH1 CH2 EXT
EXT/5
D15-D0
(+Pulse width
less than)
(+Pulse width
more than)
(+Pulse width
equal to)
(-Pulse width
less than)
(-Pulse width
more than)
(-Pulse width
equal to)
Selects CH1 as trigger signal Select CH2 as trigger signal Select EXT TRIG as tri
er signal Select attenuated EXT TRIG/5 as trigger signal Select a digital channel in D15-D0 as trigger source( Only in mixed signal oscilloscopes)
To select pulse condition
Settings
<Width>
Set required pulse width
© Copyright RIGOL Technologies, Inc. 2006. 2-39
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Figure 2-44 Table 2-22
Menu Settings Comments
Acquire waveform even no trigger occurred Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform and then stop
To go to Set Up menu, see table 2-38
Sweep
Set Up
Auto
Normal Single
Note: The Pulse width adjust range is 20ns ~ 10s. When the condition is met, it
will trigger and acquire the waveform.
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Settings for Video Trigger
Choose video trigger to trigger on fields or lines of NTSC, PAL, or SECAM standard video signals. Trigger coupling preset to DC.
Figure 2-45 Table 2-23 (Page One)
Menu Settings Comments
CH1
Source
CH2 EXT EXT/5
Normal polarity
Polarity
Inverted polarity
All Lines Line Num
Sync
Odd field Even field
Figure 2-46 Table 2-24 (Page Two, when Sync is set as the specified line)
Menu Settings Comments
Line Num
Standard
< Line sync >
PAL/SECM NTSC
Selects CH1 as trigger source Select CH2 as trigger source Select EXT TRIG as trigger source Select EXT TRIG/5 as trigger source
Triggers on negative going sync pulses
Triggers on positive going sync pulses
Trigger on all lines Trigger on an specified line
Select to trigger on odd field Select to trigger on even field
Select the specified line number for
sync
Select Video standard
Set Up To go to set up menu, see table 2-39
© Copyright RIGOL Technologies, Inc. 2006. 2-41
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Figure 2-47 Table 2-25 (when the Sync is set as All lines, Odd field and Even field)
Menu Settings Comments
Standard
PAL/SECAM NTSC
Select Video standard
Set Up To go to set up menu, see table 2-39
Key points
Sync Pulses: When Normal Polarity is selected, the trigger always occurs on
negative-going sync pulses. If the video signal has positive-going sync pulses, use the inverted Polarity selection.
Figure 2-48: Line Synchronization
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Figure 2-49: Video Trigger: Field Synchronization
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SLOPE TRIGGER
Slope trigger sets the oscilloscope as the positive/negative slope trigger within the specified time
Figure 2-50 Table 2-26 ( Page One)
Menu Settings Comments
CH1
Source
CH2
EXT
EXT/5
When
Time
<Time Set >
Figure 2-51 Table 2-27 ( Page Two)
Menu Settings Comments
Vertical
Set channel 1 as trigger source Set channel 2 as trigger source Set EXT. channel as trigger source Set EXT/5 as trigger source
Set slope condition
Set slope time
Select the level that can be adjusted by
Acquire waveform even when no trigger condition is met. Acquire waveform when trigger condition is met. When trigger condition is met, acquire one waveform and then stop
Sweep
Auto
Normal
Single
Set Up To go to set up menu. See table 2-38
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Note: Slope time can be set from 20ns to 10s. When a signal meets the trigger condition, scope will execute the acquisition. You can adjust LEVEL A/ LEVEL B or both simultaneous by turning the
knob.
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Alternative Trigger
When alternative trigger is on, the trigger sources are from two vertical channels. This mode can be used to observe two non-related signals. You can choose two different trigger modes for the two vertical channels. The options are as follows: Edge, Pulse, Slope and video. The info of the trigger level of the two channels will be displayed on the upper-right of the screen.
Figure 2-52 Table 2-28 (Trigger Type: Edge)
Menu Settings Comments
Select
Type Edge
Slope
Set Up
CH1
CH2
(Rising) (Falling) ( Rising &
Falling
To go to set up menu. See table
Set trigger mode for Channel 1 Set trigger mode for Channel 2
Set Edge Trigger as the trigger type
Trigger on rising edge Trigger on falling edge Trigger on both ring & falling edge
2-38
2-46 © Copyright RIGOL Technologies, Inc. 2006.
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Figure 2-53 Table 2-29 (Trigger Type: Pulse Page One )
Menu Settings Comments
RIGOL
Select
CH1
CH2
Type Pul se
(+Pulse width
Set trigger mode for Channel 1 Set trigger mode for Channel 2
Set Pulse Trigger for the channel
less than)
(+Pulse width
more than)
(+Pulse width
When
equal to)
(-Pulse width
To select pulse condition
less than)
(-Pulse width
more than)
(-Pulse width
equal to)
Figure 2-54 Table 2-30 (Trigger Type: Pulse Page Two)
Menu Settings Comments
Setting
Set Up
<
To go to set up menu. See
© Copyright RIGOL Technologies, Inc. 2006. 2-47
User Manual for DS1000 Series
pulse width>
Set the width of the pulse
table 2-38
RIGOL
Figure 2-55 Table 2-31Trigger Type: Slope Page One
Menu Settings Comments
Select
CH1
CH2
Type Slo p e
Set trigger mode for Channel 1 Set trigger mode for Channel 2
Set Slope Trigger for the vertical channel
When
Set trigger condition
Figure 2-56 Table 2-32Trigger Type: Slope Page Two
Menu Settings Comments
Time
<
Time Set >
Set slope time
Select the level to be adjusted by
Vertical
Set Up
To go to set up menu. See table
2-38
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Figure 2-57 Table 2-33Trigger Type: Video Page One
Menu Settings Comments
RIGOL
Select
CH1
CH2
Set trigger mode for Channel 1 Set trigger mode for Channel 2
Type Video Video Trigger for the channel
Polarity
Normal polarity
Inverted polarity
Triggers on negative going sync pulses Triggers on positive going sync pulses
Figure 2-58 Table 2-34Trigger Mode: Video Page two
Menu Settings Comments
ALL lines Line Num
Trigger on all lines Trigger on an specified line
Sync
Odd field Even field
Select to trigger on odd field or even field
Line Num
Standard
Set Up
<
Lines Set >
PAL/SECM NTSC
Select the specified line number for sync
Select Video standard
To go to set up menu, see table 2-39
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Pattern TriggerMixed Signal Oscilloscope
Pattern trigger identifies trigger terms by checking appointed code. The code is
logical relationship of all channels, with high (H), low (L) and ignore(X).
Figure 2-59 Table 2-35
Menu Settings Comments
Select D15-D0 Choose digital channel for Pattern trigger
High Low Ignore Rising Edge Falling Edge Acquire waveform even no trigger occurred
Acquire waveform when trigger occurred When trigger occurs, acquire one waveform and then stop
To go to set up menu, see table 2-40
Code
Sweep
Set Up
H
L X
Auto Normal Single
Key Points:
HHigh):Logic high: voltage is higher than threshold setting.
LLow): Logic low: voltage is lower than threshold setting.
XIgnore):Don’t care. If all the channels are ignored, the oscilloscope won’t be
triggered.
Rising Edge
or Falling Edge( ):Set the code as an edge of the channel,
rising edge or falling edge. When the edge is appointed, if code settings of other
channels are all true, the oscilloscope will be triggered on the appointed edge. If no
edge is appointed, the oscilloscope will be triggered on the last edge whose code is
true.
Edge of appointed code
You can only appoint one code as edge. If you have appointed an edge, then appointed another edge in a different channel, and the first appointed edge will be set to X (Ignore).
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Duration TriggerMixed Signal Oscilloscope
Trigger in appointed time when code terms are satisfied.
Figure 2-60 Table 2-36Page One
Menu Settings Comments
Choose digital channel for Duration Trigger
High Low Ignore
Set time limit terms
Select D15-D0
H
Code
L X
<
Qualifier
> =
RIGOL
Figure 2-61 Table 2-37Page Two
Menu Settings Comments
Time
Time
<
Setting
>
Auto
Sweep
Normal Single
Set Up To go to set up menu, see table 2-40
Set duration and limit symbol time
Acquire waveform even no trigger occurred Acquire waveform when trigger occurred When trigger occurs, acquire one waveform and then stop
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Key Points:
HHigh):Logic high: voltage is higher than threshold setting.
LLow):Logic low: voltage is lower than threshold setting.
XIgnore):Don’t care. If all the channels are ignored, the oscilloscope won’t be
triggered.
Qualifier A timer begins when code terms are satisfied. Duration trigger occurred in the time set by the qualifier.
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Trigger Settings
In trigger set up menu, you can set up different trigger settings according to different
trigger modes. When in the mode of Edge and Pulse, the source is D15-D0 (Mixed
Signal Oscilloscope), only Holdoff is adjustable. When source is non-digital channel
and in slope trigger, only trigger coupling, trigger sensitivity and Holdoff can be set.
For video trigger, Sensitivity and Holdoff can be set. For Pattern trigger and Duration
trigger (Mixed Signal Oscilloscope), only Holdoff can be set. When in Alternative
trigger, you can make different settings according to selected different trigger
modes.
Figure 2-62 Table 2-38Settings for trigger coupling, trigger sensitivity and holdoff
Menu Settings Comments
Allow all signals pass Block DC signals Reject high frequency signals Reject DC and low frequency
Coupling
DC AC HF Reject LF Reject
signals
Sensitivity
Holdoff
Holdoff
<Sensitivity Setting>
<Holdoff Setting>
Reset Holdoff time to 100ns
Set trigger sensitivity
Set time slot before another trigger event
Reset
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Figure 2-63 Table 2-39(Settings for sensitivity and holdoff)
Menu Settings Comments
Sensitivity
Holdoff
Holdoff
<Sensitivity Setting>
<Holdoff Setting>
Reset Holdoff time to
Reset
Figure 2-64 Table 2-40Settings only for holdoff
Menu Settings Comments
Holdoff
Holdoff Reset
<Holdoff Setting>
Set trigger sensitivity
Set time slot before another trigger event
100ns
Set time slot before another trigger event
Reset Holdoff time to 100ns
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Trigger Holdoff
Trigger Holdoff can stabilize complex waveform, such as the pulse range. Holdoff
time is the oscilloscope’s waiting period before starting a new trigger. During Holdoff,
oscilloscope will not trigger until Holdoff ends. For instance: To trigger on the first
pulse on a group of them, users can set the holdoff time to Pulse cluster width.
Trigger site
Trigger holdoff
Time of holdoff
Figure 2-65: Trigger Holdoff
To use trigger Holdoff:
1. Press the trigger MENU button to display Trigger Menu.
2. Press Set Up key to display trigger set up menu.
3. Turn the multi function knob
to change Holdoff time until waveform is stable.
4. Pushing Trigger Hold off reset can reset the Holdoff time to its default value.
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Trigger Key points
1. Trigger Source:
Trigger can occur from several sources: Input channels (CH1, CH2 and D15-D0 on mixed signal oscilloscopes), AC Line, Ext, Ext/5.
z CH1 or CH2: It is the most commonly used trigger source. The channel will
work when 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. Sweep Mode:
The sweep 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.
When forcing invalid triggers, the oscilloscope cannot synchronize the waveform, and the waveform seems to roll across the display. If valid triggers occur, the display becomes stable on the screen.
Any factor results in the un-stability of waveforms can be detected by Auto
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Trigger, such as the output of Power supply.
NOTE: When horizontal control is set under 50 ms/div, Auto mode allows the oscilloscope don’t capture trigger signal.
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.
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.
AC: AC coupling blocks DC components.
DC: DC coupling passes both AC and DC components.
LF Reject: LF Reject coupling blocks DC component, and attenuates all
signal with a frequency lower than 8 kHz.
HF Reject: HF Reject coupling attenuates all signals with a frequency
higher than 150 kHz.
4. Pre-trigger/delayed trigger:
The data collected before and after trigger.
The trigger position is typically set at the horizontal center of the screen. In the full-screen display the 6div data of pre-trigger and delayed trigger can be surveyed. More data (14div) of pre-trigger and 1s delayed trigger can be surveyed by adjusting the horizontal
knob.
This feature is very useful because you can see the events that led up to the trigger point. Everything to the right of the trigger point is called post-trigger information. The amount of delay range (pre-trigger and post-trigger information) available is dependent on the sweep speed selected.
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5. Adjustable trigger sensitivity
To avoid the influence of noise from the physical world, and get the stable trigger, the trigger circuit has adopted Stickiness. In DS1000 series, the stickiness is adjustable from 0.1div-1.0div, which means when it sets to 1.0div, the trigger circuit will not affect any signal with peak-peak amplitude less than 1.0div, so as to avoid the influence of the noise.
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To Set Up the Sampling System
As Figure 2-66 displays, the Acquire button for sampling system is at the MENU
Acquire setup button
Figure 2-66
Use Acquire button to pop up the menu as follows:
Table 2-41
Figure 2-67
Menu Settings Comments
Normal
Acquisition
Average Peak Detect
Averages 2 to 256
Sampling
Mem Depth
Real-Time Equ-Time
Long Mem Normal
Normal Acquisition mode Average Acquisition mode Peak Detect Acquisition mode
Step by multiple of two. Set average times from 2 to 256
Real-time sampling mode Equivalent sampling mode
Set up memory as 512K or 1M Set up memory as 1K or 2K
Sa Rate 100.0MSa Display sampling rate
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The waveform displayed on the screen will change in conjunction with the setting of Acquire menu.
Figure 2-68: Signal that contains noise, and without average sampling
Figure 2-69: Display signal after average sampling
Note:
z Select Real-time acquisition to observe the single-shot or pulse signals. z Select Equ-Time to observe high frequency repetitive signals.
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z To reduce the displayed random noise, select the Average Acquisition. And this
mode would make the screen refresh slower.
z To Avoid signal aliasing, select Peak Detect Acquisition.
Figure 2-70: Signal with Peak Detect Acquisition
The Peak Detect effect is shown as the figure above.
Stop Acquisition: When the scope is acquiring waveforms, the waveforms is in a live status; when acquisition is stopped, frozen waveform will be displayed, the position and scale can still be adjusted by vertical control and horizontal control.
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Key Points
Real-time Sampling:
DS1000 has Real-time sampling rate up to 400MSa/s. At the time base 50ns or faster, the oscilloscopes use the sine(x)/x interpolation to expand the horizontal time base.
Equivalent sampling:
Also known as Repetitive sampling. In this mode, you can get up to 40 ps of horizontal resolution (equivalent 25Gsa/s). This mode is good for observing repetitive signals, and it is not recommended for single-shot or pulse.
Normal: Oscilloscope acquires signal by equal time interval.
Average Acquisition:
Apply averaging to your signal to remove uncorrelated noise and improve measurement accuracy. Reduces random or uncorrelated noise in the signal display. The averaged waveform is a running average over a specified number of acquisitions from 2 to 256.
Peak Detect:
Peak Detect mode captures the maximum and minimum values of a signal. Finds highest and lowest record points over many acquisitions.
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To Set Up the Display System
Figure 2-71 shows the menu button for the display system on the front panel.
Figure 2-71
Display setup button
Press the Display button to pop up the menu for the settings of the display system.
Table 2-42
Figure 2-72
Menu Setting Comments
Type
Vectors Dots
Clear
Infinite
persist
OFF
Display waveforms as vectors Display waveforms as dots
Clear all existing waveforms from screen
The sample points remain displayed until turn the persistence “OFF”. Turn off the persistence function
Intensity
<
percentage >
Set up waveform intensity
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Figure 2-73
Table 2-43
Menu Settings Comments
Key points:
Grid
Brightness
Menu
Display
Screen
<
percentage >
1s 2s 5s 10s 20s Infinite
Normal Invert
Display grids and coordinates on the screen Turn off the gri d s Turn off the grids and coordinates
Set up grid brightness
Set the time before menu fades away. The menu will be hidden after the set time of last button pressing.
Set to normal mode
Set to invert color display mode
Display type: Display type includes Vector and Dot. In vectors type, oscilloscope
connects dots through digital interpolation including both linearity and sin(x)/x.
Sin(x)/x interpolation is suitable for Real-time sampling and will be more effective at
50ns or faster time base.
Refresh rate: It is an important performance of digital oscilloscopes. It means
times of oscilloscopes’ refreshing per second and will affect the ability to observe
signal.
Adjusting waveform intensity
Default setup of multi-function knob
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is adjusting waveform intensity.
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To Store and Recall Waveforms or Setups
Figure 2-74 shows the menu button for the storage system on the front panel.
Storage setup button
Figure 2-74
Press the Storage button to pop up the menu for the settings of the storage system. The waveforms and setups in both internal memory and external memory can be stored and recalled. The waveform file, setup file, bitmap and CSV file in external memory can be created and deleted. System supports English/Chinese key in.
Waveform and setup, the menu as following:
Figure 2-75 Table 2-44
Menu Settings Comments
Waveform Setups
Storage
Bit map CSV Factory
Internal
External
Disk Mana.
Store or recall waveform Store or recall instrument setups Create or delete bit map files Create or delete CSV files Recall factory setups
Go to menu for internal memory operation(see table 2-48)
Go to menu for external memory operation(see table 2-49)
Go to disk manage menu (see table 2-50)
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For factory default setups, the menu as following:
Figure 2-76
Tab le 2-45
Menu Settings Comments
Storage
Load Recall factory setups or files
Disk Mana.
For CSV, the menu as following:
Table 2-46
Figure 2-77
Menu Settings Comments
Storage
Data Depth
Para Save
External
Disk Mana.
Waveform Setups Bit map CSV Factory
Waveform Setups Bitmap CSV Factory Displayed
Maximum
On Off
Store or recall waveform Store or recall instrument setups Create or delete bit map files Create or delete CSV files Recall factory setups
Go to disk manage menu (see table 2-50)
Store or recall waveform Store or recall setups Create or delete bit map files Create or delete CSV files Recall factory setups Save currently displayed waveform data to CSV file Save the whole waveform data in memory to CSV file Save the current oscilloscope settings in different format with the same file name Go to menu for external memory operation(see table 2-49) Go to disk manage menu (see table 2-50)
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For bitmap, the menu is as follows.
Table 2-47
Figure 2-78
Menu Settings Comments
Storage
Para Save
External
Disk Mana.
Waveform Setups Bit map CSV Factory
On Off
RIGOL
Store or recall waveform Store or recall setups Create or delete bit map files Create or delete CSV files Recall factory setups Save the current oscilloscope settings in different format with the same file name Go to menu for external memory operation(see table 2-49) Go to disk manage menu (see table 2-50)
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Internal Memory
Press Storage Internal to go to the following menu.
Figure 2-79
Table 2-48
Menu Settings Comments
Int_00 (N)
Internal
. . .
Set up the location of files in internal memory
Int_09 (N)
Recall waveform files and setup
Load
files from the internal memory location
Save waveform files and setup
Save
files to the internal memory location
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External Memory
(
F
)
Press Storage External to go to the following menu.
Figure 2-80
Table 2-49
Menu Settings Comments
Explorer
New File (Folder)
Delete File
older
Path Directory File
To create new file or folder.
Delete file(Folder)
Switch among Path, Directory and File
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Load
File system as follows:
Path Back to previous folder Current directory
File info.
Recall waveform and setup from USB storage device.
Files
Figure 2-81
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Disk Manage
Press Storage Disk Mana. to go to the following menu.
Figure 2-82
Table 2-50
Menu Settings Comments
Path
Explorer
New folder
Delete File Delete file
Directory File
Switch among Path, Directory and File
To create new folder( same as new files, see table 2-13)
Figure 2-83
Load
Table 2-51
Menu Settings Comments
Rename To rename a file (see table 2-52)
Disk info Display disk information
Recall waveform, setup, recorded waveform, Pass/Fail file
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