Rigol Technologies VS5000, VS5000D User Manual

User’s Guide RIGOL

Publication number VS5000-080331 March 2008

VS5000 Series Digital Oscilloscope

VS5000D, VS5000

RIGOL

z Copyright © 1998-2008 RIGOL Technologies, Inc. All Rights Reserved. z RIGOL products are protected by patent laws in and outside of the P.R. China. z Information in this publication replaces all previously corresponding material. z RIGOL Technologies, Inc. reserves the right to modify or change part of or all

the specifications and pricing policies at company’s sole decision.

NOTE: RIGOL is registered trademark of RIGOL TECHNOLOGIES, INC.

User’s Guide for VS5000 Series

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Safety Notices

Review the following safety precautions carefully before operate the instrument to avoid any personal injuries or damages to the instrument and any products connected to it.

To avoid potential hazards, use the instrument as specified by this user’s guide only.

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 the instrument and authorized in your country only.

Connect and Disconnect Accessories Properly.

Do not connect or disconnect probes or test leads while they are connected to a voltage source.

Connect the Probe Properly.

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 guide for further ratings information before making connections to the instrument.

Do not Operate without Covers.

Do not operate the oscilloscope with covers or panels removed.

Use Proper Fuse.

Use the fuse of the type, voltage and current ratings as specified for the instrument.

Avoid Circuit or Wire Exposure.

Do not touch exposed connections and components when power is on.

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User’s Guide for VS5000 Series

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Do not Operate with Suspected Failures.

If suspected damage or malfunctions occur with the instrument, have it inspected by qualified service personnel before further operations.

Provide Proper Ventilation.

Refer to the manual’s installation instructions for proper ventilation of the instrument.

Use only UL/cUL or cCSAus certified probes with the oscilloscope.

Do not Operate in Wet/Damp Conditions. Do not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry.

The disturbance test of all the models meet the limit values of A in the standard of EN 61326: 1997+A1+A2+A3, but can’t meet the limit values of B.

Measurement Category

The VS5000 series Digital Oscilloscope is intended to be used for measurements in

Measurement Category I.

Measurement Category Definitions

Measurement Category I is for measurements performed on circuits not directly

connected to MAINS. Examples are measurements on circuits not derived from MAINS,

and specially protected (internal) MAINS derived circuits. In the latter case, transient

stresses are variable; for that reason, the transient withstand capability of the equipment

is made known to the user.

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WARNING

IEC Measurement Category I. The HI and LO input terminals may be connected to circuit terminal in IEC Category I installations for voltages up to 300 VAC. To avoid the danger of electric shock, do not connect the inputs to circuit’s voltages above 300 VAC. Transient overvoltage is also present on circuits that are isolated from mains. The VS5000 series Digital Oscilloscopes is designed to safely withstand occasional transient overvoltage up to 500 Vpk. Do not use this equipment to measure circuits where transient overvoltage could exceed this level.

Safety Terms and Symbols

Terms in this manual. These terms may appear in this guide:

!

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:

Hazardous Voltage

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.

!

Refer to Instructions

Protective Earth Terminal

Grounding Terminal of Chassis

Test Grounding Terminal

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User’s Guide for VS5000 Series

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VS5000 Oscilloscopes at a Glance

RIGOL VS5000 Series Digital Oscilloscopes offer good waveform view and

measurements in a compact, lightweight package. VS5000 series are ideal for production test, field service, research and design and all of the applications involving analog circuits test and troubleshooting, as well as education and training.

Product features: z Dual Channel, Bandwidth:

200MHz (VS5202, VS5202D) 100MHz (VS5102, VS5102D) 60MHz (VS5062, VS5062D) 40MHz (VS5042, VS5042D) 25MHz (VS5022, VS5022D)

z A true Mixed Signal Oscilloscope with 16 channels Logic Analyzer (for some

models)

z 400 MSa/s maximum real-time sample rate and 25 GSa/s maximum equivalent

sample rate

z Memory depth: 1M points (Single Channel), 512k points (Dual Channels), 512k

points (Logic Analyzer)

z Adjustable waveform intensity, more effective waveform view z One-touch automatic setup for ease of use (AUTO) 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 LPF, HPF, BPF, BRF z Add, Subtract and Multiply Mathematic Functions z Advanced trigger types include: Edge, Video, Pulse width, Slope, Alternative,

Pattern and Duration

z Adjustable trigger sensitivity

User’s Guide for VS5000 Series

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Content

Safety Notices ........................................................................................... II

VS5000 Oscilloscopes at a Glance ............................................................... V

Chapter 1 Quick Start .......................................................................... 1-1

The Front Panel and User’s Interface ........................................................ 1-2

To Inspect the Instrument ....................................................................... 1-5

To Perform a Functional Check ................................................................ 1-6

To Compensate Probes ........................................................................... 1-8

To Use Digital Leads (for VS5***D only) .................................................. 1-9

To Display a Signal Automatically ............................................................ 1-11

To Understand the Vertical Window ........................................................ 1-12

To Understand the Horizontal System ...................................................... 1-14

To Trigger the Oscilloscope .................................................................... 1-16

Chapter 2 Operating Your Oscilloscope ............................................... 2-1

To Set the Vertical system ....................................................................... 2-2

To Set the Horizontal System .................................................................. 2-23

To Set the Trigger System ...................................................................... 2-29

To Set the Sampling System ................................................................... 2-43

To Save/Load and Print Setup ................................................................. 2-47

To Set the Measurement Function ........................................................... 2-53

To Set the Utility Function ...................................................................... 2-66

To Use Run Control Buttons .................................................................... 2-72

Chapter 3 Application Examples .......................................................... 3-1

Example 1: Taking Simple Measurements ................................................. 3-1

Example 2: View a Signal Delay Caused by a Circuit .................................. 3-3

Example 3: Capture a Single-Shot Signal .................................................. 3-4

Example 4: To Reduce the Random Noise on a Signal ............................... 3-5

Example 5: Making Cursor Measurements ................................................. 3-7

Example 6: The Application of the X-Y Operation ...................................... 3-9

Example 7: Triggering on a Video Signal .................................................. 3-11

Example 8: FFT Cursor Measurement ...................................................... 3-13

Example 9: Pass/Fail Test ....................................................................... 3-14

Example 10: Triggering on a Digital Signal ............................................... 3-15

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Chapter 4 Prompt Messages & Troubleshooting ................................. 4-1

Prompt Messages .................................................................................... 4-1

Troubleshooting ...................................................................................... 4-4

Chapter 5 Specifications ...................................................................... 5-1

Chapter 6 Appendix ............................................................................. 6-1

Appendix A: Accessories .......................................................................... 6-1

Appendix B: Warranty .............................................................................. 6-1

Appendix C: Maintenance ......................................................................... 6-2

Appendix D: Contact RIGOL ..................................................................... 6-3

Index ..........................................................................................................1

User’s Guide for VS5000 Series

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Chapter 1 Quick Start

This chapter covers the following topics:

z The front panel and user interface of VS5000 Series

z To inspect the instrument

z To perform a functional check

z To compensate probes

z To use digital leads (for VS5xxxD only)

z To display a signal automatically

z To set up the vertical system

z To set up the horizontal system

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z To trigger the oscilloscope

User’s Guide for VS5000 Series

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The Front Panel and User Interface

The first thing to do with a new oscilloscope is to become acquainted with its front panel. This chapter will help to be familiar with the layout of the connectors, graphical representations, interfaces, and how to use them. Read the chapter carefully before further operations.

Figure 1-1

VS5000 Series Oscilloscope

VS5000 series oscilloscopes provide an easy-to-use user interface. In the main menu, access the function options from the menu and the drop-down menu to operate VS5000 series oscilloscope. There’re shortcuts for some common functions.

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Run Control Buttons Main menu

Automatic Measurement Shortcut

Delay Setting

Trigger Setting

CH1 Setting

CH2 Setting Digital Signal Control Waveform

Brightness Setting

Figure 1-2

VS5000 Operation Interface

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Trigger level

Channel 1

Channel 2

Digital

Channels

Trigger point, Time reference

Figure 1-3

Display Interface (Analog and Digital channels)

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To Inspect the Instrument

After receiving a new VS5000 series oscilloscope, please inspect the instrument as following steps:

1. Inspect the shipping container for damage.

Keep the 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 guide. If the contents are incomplete or damaged notify the RIGOL Sales Representative.

3. Inspect the instrument.

In case there is any mechanical damage or defect, or the instrument does not operate properly or fails performance tests, notify the RIGOL Sales Representative.

If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as the RIGOL sales office. Keep the shipping materials for the carrier’s inspection.

RIGOL offices will arrange for repair or replacement at option of RIGOL without

waiting for claim settlement.

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To Perform a Functional Check

Perform this quick functional check to verify that the instrument is operating correctly.

1. Prepare for using the instrument.

Use the power cords designed for the oscilloscope only. Connect to a power source that delivers 100 to 240 VAC, 45Hz to 440Hz. Power up the system, initiate the program. Click the Storage button, select Load Default in the menu box.

Status indicators

Channel 1, 2 and Ext Trigger

Probe compensator

Figure 1-4

Instruction of the Front Panel

2. Input a signal to a channel of the oscilloscope

VS5000 Series are equipped with dual channels plus external trigger, and 16 channels logic analyzer (only for VS5***D models).

Please defer to the following steps to connect to signal:

1） Set the attenuation switch on the probe to 10X (Figure 1-6) and connect the

probe to CH1 on the oscilloscope. Align the slot in the probe connector with the key on the CH1 BNC connector. Push to connect, and twist to the right to lock the probe in place. Attach the probe tip and ground lead to the Probe compensator connector.

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Probe compensator

Figure 1-5

Probe Compensation

2） Set the probe attenuation of the oscilloscope to X10. (Default probe attenuation

is X1). Method of set the probe attenuation: Right click the button into the Channel menu. In the Probe menu, select the

probe attenuation. Now select the 1:10 option.

Probe attenuation

Figure 1-6 Figure1-7 To Set the Probe To Set the Probe Attenuation

3） Click the

button. Within a few seconds, a square wave will display

(approximately 1 kHz 3 V peak- to- peak).

4） Click the

button to turn Channel 1 off, click the button to turn Channel 2

on. Repeat steps 2 and 3.

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To Compensate Probes

Perform this adjustment to match the characteristics of the probe and the channel input. This should be performed whenever attaching a probe to any input channel the first time.

1. From the Probe menu, select attenuation to 1:10. Set the switch to X10 on the probe and connect it to CH 1 of the oscilloscope. When using the probe hook-tip, insert the tip onto the probe firmly to ensure a proper connection. Attach the probe tip to the Probe Compensator and the reference lead to the ground connector, select CH 1, and then press the

2. Check the shape of the displayed waveform.

Over compensated Correctly Compensated Under Compensated

button.

Figure 1-8

Instruction Waveform of Probe Compensation

3. If necessary, use a non-metallic tool to adjust the trimmer capacitor of the probe for the flattest square wave being displayed on the oscilloscope.

4. Repeat if 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 (for VS5***D only)

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, the oscilloscope may remain on.

2. Connect one end of the flex cable FC1868 to the Logic Analyzer Input; connect

the other end to Logic Head LH1116. It is unnecessary to switch off power supply of the oscilloscope while connecting the cable.

Figure 1-9

Connect the Flex Cable

CAUTION：Use only FC1868, LH1116, TC1100 and LC1150 made by

!

RIGOL for specified mixed signal oscilloscopes.

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3. Connect a test clip to one lead wire; make sure it is connected well.

Test clip

Figure 1-10

Connect the Test Clip

4. Test the device with the clip.

Figure 1-11

Testing Instruction

5. Remember to connect Ground Channel to the ground terminal of the DUT.

GND

Figure 1-12

Ground Connection

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To Display a Signal Automatically

The VS5000 series oscilloscope has an automated function to display the input signal in best fit. This feature requires a 50 Hz or higher and a duty cycle greater than 1% input signal.

Press the HORIZINTAL and TRIGGER controls to display the input signal. Adjust the controls manually to get the best results if necessary.

Connect a signal to the Channel 1 (CH1) input:

1． Connect a signal to the oscilloscope as described above.

button, the oscilloscope automatically sets up VERTICAL,

2． Click the

button.

The oscilloscope may change the current settings to display the signal, i.e. the vertical and horizontal scale, the trigger coupling, type, position, slope, level, and mode.

User’s Guide for VS5000 Series

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To Understand the Vertical Window

Figure 1-13 shows the V parameters.

1． Use the Analog function in the Vertical menu to adjust the functions of the

analog channels. A voltage value is displayed for a short time indicating how far the ground reference is located from the center of the screen. Use the left

mouse button to dragging the CH1 symbol, and/or use the Scale and Offset

options to set the scale and offset precisely.

ertical menu, which leads to the setting of the vertical

Figure 1-13 Vertical Menu

Measurement hints

If the channel is DC coupled, measuring 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 to use greater sensitivity to display the AC component of the signal.

Vertical offset back to 0 shortcut

Double click the channel sign, as a shortcut, to set the vertical display position back to 0.

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2． Change the vertical setup and notice that each change affects the status bar

differently.

Left-click the vertical status and use the number keyboard to input the exact

Scale value (volt/div); and/or adjust the Scale quickly with the

Click A

nalog, Digital, Math and Reference in the Vertical menu, to set analog

channels, digital channels, math and waveform reference functions.

button.

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To Understand the Horizontal System

Figure 1-14 shows the H parameters.

1． Using the Horizontal function in the Horizontal menu to set the waveform

horizontal options. In the Horizontal window, set the waveform display format (Y-T, X-Y and Roll) and horizontal Scale and Offset.

orizontal menu, which leads the setting of the horizontal

Figure 1-14 Horizontal Menu

Click the

button, 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 VS5000 series are listed as follows. The horizontal scan speed is from 5ns/div

[1]

to 50s/div.

Delayed Scan Shortcut key

Click the button to enter Delayed Scan mode.

[1] NOTE: The speed of horizontal scan varies in different models.

2． Click the Offset function in the Horizontal window to adjust the horizontal

offset.

Horizontal offset back to 0 shortcut key

Click the middle circular button “ shortcut key

” to set the horizontal offset to 0 as a

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3． In the Format window of the Horizontal functions window, select the display

mode to Y-T, X-Y or Roll.

Horizontal position control

Trig-Offset: In this setting, the trigger position will be changed horizontally

when the offset value changed.

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To Trigger the Oscilloscope

Figure 1-15 shows the Trigger Control, use the functions in the Trigger window of

the H

orizontal menu. The following exercise guides through the buttons and

settings.

Figure 1-15 Trigger Control

1． To set the trigger function in the T

rigger menu.

Drag the Trigger level to adjust the trigger level; or input the trigger level directly on the top right corner (Status window right side of the

2． Click the

button, turn the Trigger window on (Figure 1-16), to set the

button).

trigger options.

Figure 1-16 Trigger Window

Trigger level back to 0 shortcut key

Double click the trigger level sign to set the trigger level to 0 as a shortcut key.

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3． Double click the trigger point, to set the horizontal delayed time to 0 as a

shortcut key.

4． Click the

button to start an acquisition regardless of an adequate trigger

signal, usually used in “Normal” or ”Single” trigger mode. If the acquisition is already stopped, click this button to start the acquisition again.

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.

In order to set the holdoff time, set the Holdoff Time option in the Trigger

menu.

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Chapter 2 Operating Your Oscilloscope

The VERTICAL, HORIZONTAL, and TRIGGER control systems and know how to determine the system setup from the status bar of a VS5000 Series oscilloscope were introduced in the previous chapter.

This chapter will go through all groups of buttons, knobs, and menus, expanding the knowledge of operations by hints in this guide.

It is recommended to perform all of the following exercises to get the most of the powerful measurement capabilities of the oscilloscope.

z Understand the vertical system (

, ,

[1]

, Vertical )

z Understand the horizontal system ( Horizontal )

z Understand the trigger system ( Trigger )

z To set up the sampling system ( Acquire )

z To set up the display system ( Display )

z To save and recall ( Storage )

z To set up utility ( Utility )

z To measure the waveform ( Analyzer )

z To use the run control buttons ( , and )

[1] NOTE: This function is for VS5***D model only.

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To Set the Vertical system

Analog Channel Settings

Each channel of VS5000 has an operation menu.

Right click the

Turn the function On/Off:

or the button; the “Channel” window will appear.

Figure 2-1

Channel Window

In front of the function option there is a

function is turned OFF,

CAUTION: 1. To aviod damaging the input part of the oscilloscope, when

!

2. For the probe provided for the oscilloscope, do not use 50 ohm settings directly.

2-2

means it is turned ON.

use 50 ohm settings, make sure that the input voltage do not exceed the limit voltage (5Vrms, corresponding to the 1:1 probe)

User’s Guide for VS5000 Series

or choice box, means this

Table 2-1 Analog Channel Functions

Function Setting Description

Channel Switch

ON

OFF

Open the Channel Close the Channel

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Input Impedance

BW Limit

Coupling

[1]

1M ohm 50 ohm

ON

OFF

DC

AC

Set the Input Impedance to be 1M ohm Set the Input Impedance to be 50 ohm

Limit the channel bandwidth to 20MHz to reduce display noise.

Get full bandwidth. Pass both AC and DC components of the input signal Block the DC component of the input signal

1:1

Probe

1:10 1:100

Set this to match the probe attenuation factor to make the vertical scale read correct

1:1000

Scale

Invert

Coarse

Exactitude

ON OFF

Select the resolution of the a 1-2-5 sequence. Input the scale value directly.

Turn on the invert function. Restore to original display of the waveform.

button defines

[1] NOTE: The Input Impedance option is only used for VS5202D or

VS5202.

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1. Channel Coupling

To use Channel 2 as an example, input a sine wave signal with DC offset.

Right click the button or select the Analog function in the Vertical menu, and

enter the Channel window. Set the Coupling to AC. In this setting, it blocks the DC

component of the input signal.

AC Coupling

Channel Sign

Figure 2-2

To Set AC Coupling

Right click the

button or select the Analog function in the Vertical menu, to

enter the Channel window. Set the Coupling to DC. In this setting, it blocks the AC

component of the input signal.

Channel Sign

DC Coupling

Figure 2-3

To Set DC Coupling

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2. Set up the Channel Bandwidth Limit

To use Channel 1 as an example, input a signal that contains high frequency component.

Right-click the button, the Channel window will appear. Turn the BW Limit

function off. The oscilloscope is set to full bandwidth and will pass the high frequency component in the signal.

Turn o f f the BW Limit

Figure 2-4

Turn off the BW Limit

Right-click the button, the Channel window will appear. Turn the BW Limit

function on. It will reject the frequency component higher than 20MHz.

20MHz BW Limit

Figure 2-5

Turn on the BW Limit

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3. Probe Attenuation Setting

Select the attenuation factor for the probe. The attenuation factor changes the vertical scale 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 are in using), toggle the Probe soft button to match the

attenuation factor of the probe.

This setting remains in effect until changed again.

Figure 2-6 gives an example for using a 1:1000 probe and its attenuation factor.

Vertical volt/div

Table 2-2 Probe setting

Probe attenuation factors Corresponding settings

1:1 1X

1:10 10X

1:100 100X

1:1000 1000X

Probe Attenuation

Figure 2-6

To Set the Probe Attenuation

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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, in a 1-2-5-step sequence from 2mV/div, 5mV/div, 10mV, to 5 V/div.

Fine:

This setting changes the vertical scale with accurate value.

Fine adjustment setting value

Fine adjustment data Coarse adjustment

Figure 2-7

Scale and Offset Window

Set the vertical scale and offset in the Scale and Offset function of the Channel

window.

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5. To Invert a Waveform

Invert turns the displayed waveform 180 degrees, with respect to the ground level. When the oscilloscope is triggered on the inverted signal, the trigger is also inverted.

Figure 2-8 and 2-9 show the changes before after inversion.

Invert OFF

Figure 2-8

The Waveform before Inversion

Figure 2-9

The Waveform after Inversion

Invert ON

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Digital Channel Settings (for VS5***D only)

It allows to turn single channel or group channels ON or OFF, to set the Wave Size, to change display location of digital channel on screen and to select Threshold Type.

Left click the D

igital button in the Vertical menu, or right click the button to

show the Logic Analyzer window.

Logic Analyzer Interface

Table 2-3 Logic Analyzer Settings

Function Setting Description

D7-D0 Set up channel group D7-D0

Figure 2-10

D15-D8 Set up channel group D15-D8

All on ON/OFF

Turn all (D7-D0 or D15-D8) digital channels ON/OFF

Wave Size Big/Small Select the waveform display size.

Reset Reset the waveform display position.

TTL

Threshold Type

CMOS ECL USER

User’s Guide for VS5000 Series

Select mode of all digital channels.

The threshold voltage can be set by user in user-defined style.

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1．Display and re-line up the digital channels

1） Tu rn on the Logic Analyzer window. Use the options in this window to set the

Channel ON/OFF, Wave Size, Threshold Type and Reset the waveform display position.

2） Drag the digital channel sign to move the digital waveform to the designated

location.

3） Click the Reset button to reset the waveform position.

Figure 2-11

Open the Channels of D0~D7

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2．Set Threshold Type of Digital Channels

Select logic standard or User to define the threshold voltage.

Threshold type

Figure 2-12

To Set the Threshold Type

Setup the value of threshold by user

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Threshold explanation

LOGIC STANDARD THRESHOULD VOLTAGE

TTL 1.4V CMOS 2.5V ECL -1.3V USER -8V to +8V

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Math Functions

The mathematic functions include “add”, “subtract”, “multiply” and “FFT” for Channel 1 and Channel 2. The mathematic result can be measured by the grid and the cursor. The Math function may turn on four channels, each channel could be operated independently (Except Delayed display).

Figure 2-13

Interface of the Mathematic Function

Table 2-4 Mathematic Function

Function Setting Description

Math

On Off

A+B A- B

Operation

A×B FFT Filter

Source A

Source B

CH1 CH2

Turn this math channel on. Turn this math channel off. Add source A and source B

Subtract source B from source A Multiply source A by source B

Fast Fourier Transform Digital filter

Define CH1 or CH2 as source A

Define CH1 or CH2 as source B

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1. Digital Filter

Left click the Math button in the Vertical menu. Select Filter function. In Filter Type, select the type of filter: Low Pass, High Pass, Band Pass or Band Reject. Set

high and low limit of frequency.

Turn off Digital Filter

Turn o n Digital Filter

Figure 2-14

Interface of the Digital Filter

Table 2-5 Digital Filter Function

Function Setting Description

Source

Digital Filter

CH1 CH2

Off On

Low Pass

Filter Type

High Pass Band Pass Band Reject

Upper limit

Lower limit

Define CH1 or CH2 as source

Turn off the digital filter Turn on the digital filter Setup as LPF (Low Pass Filter)

Setup as HPF(High Pass Filter) Setup as BPF (Band Pass Filter)

Setup as BRF(Band Reject Filter)

Set high limit

Set low limit

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2. Addition, Subtraction and Multiplication Function

In Math function, use the addition, subtraction and multiplication function to operate and analyze the waveform.

Figure 2-15

The Addition, Subtraction and Multiplication Function

Enter the Math window. Select the math function in the Operator menu. Select Source A and B. Then adjust the vertical Scale and Offset to view the math channel

clearly.

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3. Using the FFT

The FFT (Fast Fourier Transform) process converts a time-domain signal into its frequency components mathematically. 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

Table 2-6 FFT Function

Function Setting Description

Source

Window

Display

CH1 CH2

Rectangle Hanning Hamming Blackman

Split Full screen

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

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.

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Selecting a FFT Window

VS5000 series digital oscilloscopes provide four FFT window functions. Each window is a trade-off between frequency resolution and amplitude accuracy. It depends on the desired measurements and source signals characteristics to determine the window to use. Use the following guidelines to select the best window.

Table 2-7 FFT Windows description

Window Features 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

Rectangle

Best frequency resolution and worst magnitude resolution. This is essentially the same as no window.

relatively slow varying spectrum.

Hanning

Hamming

Better frequency, poorer magnitude accuracy than Rectangular. Hamming has slightly better frequency resolution than Hanning.

Blackman Best magnitude, worst

frequency resolution.

Sine, periodic, and narrow-band random noise.

Transients or bursts where the signal levels before and after the events are significantly different.

Single frequency waveforms, to find higher order harmonics.

Key points: FFT Resolution

With a fixed FFT points, the lower sampling rate results in better resolution.

Nyquist Frequency

The highest frequency that any real-time digital 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.

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Set the Reference

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.

Click the Reference button in the Vertical menu, go to the Reference window.

Table 2-8 Reference Function

Function Setting Description

CH1 CH2

Source

MATH1 MATH2 MATH3 MATH4

File

Off On

Save Save Reference waveform

Select CH1 as Reference channel Select CH2 as Reference channel Select Math1 as Reference channel Select Math2 as Reference channel Select Math3 as Reference channel Select Math4 as Reference channel

Turn the file selection off Turn the file selection on

Load Into the Open File window

Figure 2-16

Interface of Reference

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1． Export

Click the Load button in the Reference window.

Table 2-9 Export Function

Function Setting Description

Open Load the file that was selected

Cancel Cancel the current operation

Keyboard

Use the soft-keyboard input the file name

The Open File window as shown below:

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Figure 2-17

Open a Reference File

User’s Guide for VS5000 Series

2． Import

Click the Save button in the Reference window.

Table 2-10 Import Function

Function Setting Description

Save Save the file that was named

Cancel Cancel the current operation

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Keyboard

Use the soft-keyboard input the file name

The Save File window as shown below:

Figure 2-18

Save a Reference File

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3． Open/Save File Window

Click the Load button in the Reference window to turn on the “Open File”

window.

Table 2-11 Open/Save Functions

Function Setting Description

Driver

Select the driver location

Switch the driver

Open the selected file

Open/Save

Save the file with the input File Name

Cancel Cancel the current operation

Keyboard

Use the soft-keyboard input the

file name

The Open/Save File Window as shown below:

Open/Save File Windows

NOTE:

The File function is default Off ( the File function On ( ).

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User’s Guide for VS5000 Series

Figure 2-19

), to save the file in the hard driver, turn

Operation Comments

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1） Click On (

) to turn the Reference function on.

2） Click Source to select CH1, CH2, MATH1, MATH2, MATH3 and MATH4 channel. 3） Adjust the Scale and Offset of the Vertical and Horizontal.

4） Click the Save button to save the waveform being displayed on the screen as

Reference.

NOTE: The Reference function is not available in X-Y mode.

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Turn on/off Channels

The CH1, CH2, Ext Trigger and LA (for VS5***D only) channels on VS5000 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 button turns coloured indicates the channel is currently active. Press the

button again or chose Off in Channel/Logic Analyzer window to turn the channel

off.

Table 2-12 Turn On/Off channels

Channel Mode Settings

Channel 1 (CH1)

Channel 2 (CH2)

ON OFF

ON

MATH

OFF

[1]

ON OFF

Reference

Logic Analyzer

CH1 (yellow background) CH1 (gray background)

CH2 (blue background) CH2 (gray background)

M1 M2 M3 M4 (to distinguish between the four colors)

No indicator

Ref 1/2/3/4 (white background) No indicator

LA (green background) LA (gray background)

Status Indicator

NOTE:

The status indicators (CH1, CH2 and LA) of the VS5000 series in the above table are displayed on the lower-left of the main window.

The four MATH function channels are distinguished between the four colors.

Click of

will turn all the digital channels on/off.

[1] Logic Analyzer for VS5***D model only.

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To Set 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 using Delayed Scan, or Alternative Trigger.

The horizontal controls changes 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 with respect to the screen center.

Horizontal position changes the displayed waveform position, relative to the trigger point.

Scale

: Set 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.

Offset

: Adjusts the horizontal position of all channel (including Math) waveforms. The resolution of this control varies with the time base. Click the Mid-circular button clears trigger offset and moves the trigger point to the horizontal center of the screen.

Table 2-13 Horizontal Setting Function

Function Setting Description

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.

Time Base

Y-T

X-Y

Roll

Scale Set the horizontal scale

Offset Set the horizontal offset

Delayed

Off On

User’s Guide for VS5000 Series

Turn off Delayed Scan mode Turn on the Delayed Scan mode

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④①②③⑤

Figure 2-20

Horizontal Setting Information in Main Interface

Marks Indicator

①. The current waveform position window in the memory. ②. The trigger position in the memory. ③. The trigger position in the current waveform windows. ④. The horizontal time base (the main time base). ⑤. The trigger’s horizontal offset according to the center of the window.

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gg

Key Points Y-T:

The 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:

X-Y 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 tri

er, 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 Time/Div control expands or compresses the waveform.

User’s Guide for VS5000 Series

button), the

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p

1. Delayed Scan

The Delayed Scan is a magnified portion of the main waveform window. Use Delayed Scan to locate and horizontally expand part of the main waveform window for a more

detailed (higher horizontal resolution) analysis of signal. The Delayed Scan time base

setting cannot be set slower than the main time base setting.

Main time base

Waveform to be horizontally expanded

Time base of Delayed Scan

Ex

anded waveform in horizontal

Figure 2-21

Delayed Scan

The following describes the Delayed Scan display.

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 window. Two blocks shadow the upper half; the un-shadowed portion is expanded in

the lower half. The horizontal

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and knobs control the size and position of the

User’s Guide for VS5000 Series

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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.

Delayed Scan shortcut key:

Delayed Scan function can be activated not only by the menu but also by click the

.

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2. X-Y Mode

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 2-22

The X-Y Display Format

The following modes or functions will not work in X-Y mode.

z LA Function (for VS5***D only)

z Automatic Measurements

z Cursor Measurements

z REF and MATH Operations

z Delayed Scan Mode

z Vector Display Mode

z Horizontal

Button

z Trigger Controls

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User’s Guide for VS5000 Series

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To Set 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.

In the H

Mode: Select the trigger mode.

orizontal of the main menu, there is Trigger menu include:

Setting: Set the trigger Source channel, trigger Level and trigger Slope mode. Sweep: Set the sweep mode to Auto, Normal or Single. Trigger setting: Set the trigger Coupling, adjust the trigger Sensitivity and

adjust the Holdoff Time.

Figure 2-23

Interface of Trigger Settings

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Trigger Modes

The oscilloscope provides seven trigger modes: Edge, Pulse, Slope, Video, Alternative, Pattern and Duration trigger (for VS5***D only).

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 specified codes.

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 or falling edge.

Table 2-14 Edge Trigger Settings

Function Setting Description

Mode

Source

CH1 CH2 EXT EXT/5 AC Line D15-D0

Select the trigger mode to Edge

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 (for VS5***D only)

Slope

Sweep

Rising Falling

Auto

Normal Single

Trigger on rising edge Trigger on falling edge

Acquire waveform even no trigger occurred Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform then stop

Set Up To go to the Set Up menu

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Settings for Pulse Width Trigger

Pulse trigger occurs according to the width of a pulse. The abnormal signals can be detected through setting up the pulse width condition.

Table 2-15 Pulse Width Trigger Settings

Function Setting Description

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 a digital channel in D15-D0 as trigger source(for VS5***D only)

Source

CH1 CH2 EXT EXT/5

D15-D0

Level To set the trigger level

+Pulse width more than +Pulse width less than +Pulse width equal to

-Pulse width more than

-Pulse width less than

-Pulse width equal to

When

+More than +Less than +Equal

-More than

-Less than

-Equal

Pulse Width Set required pulse width

Acquire waveform even no trigger occurred Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform then stop

Sweep

Auto

Normal

Single

Set Up To go to the Set Up menu

NOTE: The Pulse width adjusts range is 20ns - 10s. When the rule 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.

Table 2-16 Video Trigger Settings

Function Setting Description

Source

Polarity

Standard

CH1 CH2 EXT EXT/5

Normal polarity

Inverted polarity

NTSC PAL/SECAM

Select 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

Select Video standard

Set up To go to the Set Up menu

Sync

All Lines Line Num

Odd field Even field

Trigger on all lines Trigger on an specified line

Select to trigger on odd field Select to trigger on even field

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.

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Figure 2-24

Video trigger: Line Synchronization

2-34

Figure 2-25

Video trigger: Field Synchronization

User’s Guide for VS5000 Series

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Settings for Slope Trigger

Slope trigger sets the oscilloscope as the positive/negative slope trigger within the specified time.

Table 2-17 Slope Trigger Settings

Function Setting Description

Source

When

CH1

CH2

EXT

EXT/5 +More than

+Less than +Equal

-More than

-Less than

-Equal

Set channel 1 as trigger source Set channel 2 as trigger source Set EXT channel as trigger source Set EXT/5 as trigger source

+Slope width more than +Slope width less than +Slope width equal to

-Slope width more than

-Slope width less than

-Slope width equal to

Time To set slope time

Level A

Level B

Set Up

To set the Level A

To set the Level B

To go to the Set Up menu

NOTE: Slope time can be set from 20ns to 10s. When a signal meets the trigger

condition, scope will execute the acquisition. Level A/ Level B is adjustable.

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Settings for 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. Choose two different trigger modes for the two vertical channels. The options are as follows: Edge, Pulse, Slope and Video. The information of the trigger level of the two channels will be displayed on the upper-right of the screen.

Table 2-18 Alternative Trigger Settings

Function Setting Description

Channel

Trigger Type

Set Up

CH1

CH2

Edge/Pulse/ Slope/Video

Set trigger mode for Channel 1 Set trigger mode for Channel 2

Set Edge/Pulse/Slope/Video Trigger as the trigger type

To go to the Set Up menu

NOTE:

In Alternative Trigger, each channel is allowed to set the trigger mode independently.

The trigger setting of CH1 and CH2 are mutually independently. Please make

attention to the Channel options.

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Settings for Pattern Trigger (for VS5***D only)

Pattern trigger identifies trigger terms by checking appointed code. The code is logical relationship of all channels, with High (H), Low (L), Ignore (X), Rising and Falling.

Table 2-19 Pattern Trigger Settings

Function Setting Description

Defining D15-D0 Choose digital channel for Pattern trigger

High Low Ignore Rising Falling

Acquire waveform even no trigger occurred Acquire waveform when trigger occurred When trigger occurs, acquire one waveform and then stop

To go to the Set Up menu

Pattern

Sweep

Set Up

H L X Rising Falling

Auto Normal Single

Key Points: H (High): Logic high: Voltage is higher than threshold setting. L (Low): Logic low: Voltage is lower than threshold setting. X (Ignore): Don’t care. If all the channels are ignored, the oscilloscope won’t be

triggered.

Edge of appointed code

Appoint one code as edge only. If an edge is appointed, then appointed another edge in a different channel and the first appointed edge will be set to X (Ignore).

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Settings for Duration Trigger (for VS5***D only)

Trigger in appointed time when code terms are satisfied.

Table 2-20 Duration Trigger Settings

Function Setting Description

More than

When

Time Set duration and limit symbol time

Less than Equal

Set time limit terms

Key Points: Qualifier: A timer begins when code terms are satisfied. Duration

trigger occurs in the time set by the qualifier.

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Trigger Set Up

In the trigger set up menu, set up different trigger settings according to different trigger modes. When in the mode of Edge and Pulse, the source is D15-D0 (for VS5***D only), 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 (for VS5***D only), only Holdoff can be set. When in Alternative trigger, make different settings according to selected different trigger modes.

Table 2-21 (Settings for trigger coupling, trigger sensitivity and holdoff)

Function Setting Description

Coupling

DC AC HF Reject LF Reject

Allow all signals pass Block DC signals Reject high frequency signals Reject DC and low frequency signals

Sensitivity

Holdoff Time

Set trigger sensitivity

Set time slot before another trigger event

Table 2-22 (Settings for sensitivity and holdoff)

Function Setting Description

Sensitivity

Holdoff

Set trigger sensitivity Set time slot before another trigger

event

Table 2-23 (Settings only for holdoff)

Function Setting Description

Holdoff

Set time slot before another trigger event

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Trigger Holdoff

Use Trigger Holdoff to stabilize a complex waveform, such as a 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 Point

Time of Holdoff

Figure 2-26 Trigger Holdoff

To use trigger Holdoff:

1. Tu r n on the Trigger window, and go to th e Tr i g g e r f u n c t i o n s Menu.

2. Click the left and the right arrow (

) button to change Holdoff time until

waveform is stable.

3. Click the circular button (

) could reset the Holdoff time to its default value.

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User’s Guide for VS5000 Series

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Trigger Key Points

1. Trigger Source:

Trigger occurs from several sources: Input channels (CH1, CH2 and D15-D0 (for VS5***D only)), 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 be trigged from a third source while acquiring

data from CH1 and CH2. For example, to trigger from an external clock or with a signal from another part of the test circuit. The Ext, Ext/5 trigger sources use an external trigger signal connected to the Ext Trig connector. It has a trigger level range of +1.2 V to -1.2 V. The Ext/5 trigger source attenuates the signal by 5X, which extends the trigger level range to +6 V to -6 V, allowing the oscilloscope to trigger on a larger signal.

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 Trigger, such as the output of power supply.

NOTE: When horizontal control is set more than 50 ms/div, Auto mode allows

the oscilloscope to capture without 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.

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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 and then stop.

3. Coupling:

Trigger coupling determines which signal component passed 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. 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 6 divisions 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 scale and offset. This feature is very useful to study 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) depends on the sweep speed selected.

z Adjustable trigger sensitivity

To avoid the influence of noise from the environment and get the stable trigger, the trigger circuit has adopted stickiness. In VS5000 series, the stickiness is adjustable from 0.1div-1.0div, which means when it sets to 1.0div, the trigger circuit will not care 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 the Sampling System

The Acquire button in the Horizontal menu is used for sampling system setup.

Acquire setup button

Figure 2-27

Choose the Acquire System

Click the Acquire button in the Horizontal menu, go to the Acquire window.

Figure 2-28

To Set the Acquire System

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Table 2-24 Acquire System Settings

Function Setting Description

Sampling

Real Time Equal Time

Normal

Acquisition

Average Peak Detect

Averages 2 to 256

Memory

Normal Long

Real-time sampling mode Equivalent sampling mode

Normal Acquisition mode Average Acquisition mode Peak Detect Acquisition mode

Step by multiple of two. Set average times from 2 to 256

Set up memory as 1k or 2k Set up memory as 512k or 1M

The waveform displayed on the screen will change in conjunction with the setting of the Acquire menu.

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Figure 2-29

Signal that contains noise, and without average sampling

User’s Guide for VS5000 Series

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Figure 2-30

Signal after average sampling

NOTE:

z Select Real Time acquisition to observe the single-shot or pulse signals. z Select Equal Time to observe high frequency repetitive signals.

z To reduce the displayed random noise, select the Average acquisition and this

mode would make the waveform update slower.

z To avoid signal aliasing, select Peak Detect acquisition.

Figure 2-31

The Peak Detect Effect

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Stop Acquisition: When the scope is acquiring waveforms, the waveforms are in

live status; when acquisition is stopped, a frozen waveform will be displayed. The position and scale can still be adjusted by vertical control and horizontal control.

Key Points Real-time Sampling:

VS5000 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:

Known as Repetitive sampling to 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 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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User’s Guide for VS5000 Series

To Save/Load and Print Setup

Click the S

torage button to get into the Save/Load and Print options.

Figure 2-32

The Storage Menu

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Storage Menu

Use this menu to:

z Save and load the waveform,

z Load default setting,

z Save screen as a .bmp or .JPG file.

Table 2-25 Storage Functions

Function Setting Description

Load

Save

Print

Load Waveform Load Setup Load Default Save Waveform Save Setup Save Screen

PrintPreview Print

Load the waveform that had saved Load the instrument that had saved Load the instrument default settings Save the current waveform Save the current instrument settings Save the PC software window as a .bmp or .jpg file

Preview the waveform Print setting and do the print operation

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1. Save/Load Window

Click the Load/Save button in the Storage menu.

Table 2-26 The Save/Load Functions

Function Setting Description

Open/Save Open/Save the file that is selected

Select folder in the Folder window

Window comments

Cancel Cancel the current operation

Select file in the File window Input the file name in the File Name window Select the file type in the File Type

Keyboard

Use the soft-keyboard input the file name

An example with the Open File window:

Current driver

Current folder

Input the file name

File type

Files

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Figure 2-33

Open a Waveform File

User’s Guide for VS5000 Series

2. Load Default

The oscilloscope has default settings and can be recalled at anytime by user.

3. Files location

Specify the files location to save/load the waveform and setup.

4. Load

Recall saved waveform, setup and default settings.

5. Save

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Save waveform, setups and screen.

NOTE:

Select Save Waveform stores the waveforms, and the current settings of the

oscilloscope

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6. Print Settings

Set the printer to print the current waveform.

Figure 2-34 The Print Menu

Print button

Table 2-27 The Print Functions

Function Setting Description

PrintPreview

Preview the waveform which current will be print

Print Print the current waveform

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1. PrintPreview

Click the PrintPreview button to get into the Preview window.

Figure 2-35 Print Preview

In this window, use the Zoom In and the Zoom Out to change the size of the waveform graph.

Click the Close button to turn this window off.

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2. Print

Click the Print button to get into the Print Setup window.

Figure 2-36

The Print Interface

In the Printer option select the document to print, and then click OK to execute

printing operation.

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To Set the Measurement Function

The Measure functions are in the Analyzer menu; to do Horizontal Measure and Vertical Measure, or to use shortcut buttons to perform measurement operations.

Figure 2-37

Choose the Measurement Menu

Menu explanation:

The oscilloscopes provide 20 parametric auto measurements (10 voltage and 10 time measurements):

z Vpp, Vmax, Vmin, Vtop, Vbase, Vamp, Vavg, Vrms, Overshoot, Preshoot.

z Frequency, Period, Rise Time, Fall Time, +Width, -Width, +Duty, -Duty,

Delay1-2

, Delay1-2 .

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1．Shortcuts for Horizontal Measurements

Figure 2-38 Table 2-28 Horizontal Measurement Functions

Function Setting Description

Period Measure Period of a waveform

Frequency Measure Frequency of a waveform

Rise time Measure Rise Time of a rising edge

Fall time Measure Fall Time of a falling edge

+Width Measure +Pulse Width of a pulse wave

-Width Measure –Pulse Width of a pulse wave

+Duty Measure +Duty Cycle of a pulse wave

-Duty Measure –Duty Cycle of a pulse wave

Delay1→2

Drives the automatic measurement shortcut enter the main display interface, starts this automatic measurement.

Measure the signals delay between two channels at the rising edge

Measure the signals delay between two channels at the falling edge

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Figure 2-39

Quickly Measurement

User’s Guide for VS5000 Series

2．Shortcuts for Vertical measurements

Figure 2-40 Table 2-29 Vertical Measurement Functions

Function Setting Description

Vmax Measure maximum voltage of a waveform

Vmin Measure minimum voltage of a waveform

Vpp Measure Peak-to-Peak voltage

Vtop Measure a top voltage of a waveform

Vbase Measure a base voltage of a waveform

Vamp Measure voltage between Vtop and Vbase

Vavg Measure average voltage of a waveform

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Vrms

Overshoot

Preshoot

Measure Root Mean Square Voltage of a waveform

Measure overshoot in percentage of an edge

Measure preshoot in percentage of an edge

NOTE: The results of the automatic measurements will be displayed on the bottom

of the screen. Maximum 3 results could be displayed at the same time. When there is no room, the next new measurement result will make the previous results moving left, out of screen.

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Apply Automatic Measurement as the following steps:

1. Select the signal channel for measuring, select CH1 or CH2 according to the signal of interest.

2. To see all the measurement values, click All Measure in the Analyze menu, 18 measurement parameters will be displayed on the screen.

3. Get the measured value on the screen; select the parameters of interest by clicking the correspond button, and read the data on the bottom of the screen.

4. To Clear the measure values; click Clear Measure, and all auto measured values disappear from the screen.

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V

x

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The Automatic Measurement of Voltage Parameters

The VS5000 series oscilloscopes provide automatic voltage measurements: Vpp, Vmax, Vmin, Vavg, Vamp, Vrms, Vtop, Vbase, Overshoot and Preshoot. Figure 2-41 below shows a pulse with some of the voltage measurement points.

Overshoot

Vma

Vpp

Vtop

amp

Vbase

Vmin

Preshoot

Figure 2-41 Definition of Voltage Parameters

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.

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The Automatic Measurement of Time Parameters

VS5000 series oscilloscopes provide automatic timing parameters measurements; Frequency, Period, Rise Time, Fall Time, +Width, -Width, Delay 1→2

, Delay 1→2 ,

+Duty and -Duty.

Figure 2-42 shows a pulse with some of the time measurement points.

Rise Time

Fall Time

90%

50%

10%

+Width

-Width

Figure 2-42 Definition of Time Parameters

Rise Time: Time that the rising 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 Delay 1→2 +Duty: +Duty Cycle, defined as +Width/Period

: The delay between the two channels at the rising edge. : The delay between the two channels at the falling edge.

-Duty: -Duty Cycle, defined as -Width/Period

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To Measure with Cursor Measurements

Click the Cursor button in the Analyze menu to select the Cursor functions.

Cursor measurement

Figure 2-43

Choose the Menu of Cursor Measurement

The Cursor measurement has three modes: Auto Measure, Manual and Track.

Auto Measure:

This mode will take effect with Automatic Measurements. The instruments will display cursors while measuring parameters automatically. These cursors demonstrate the physical meanings of these measurements.

Manual:

In this mode, the screen displays two parallel cursors. Move the cursors to make custom voltage or time measurements of the signal. The values are displayed on the boxes below the menu. Before using cursors, make sure that to set the Signal Source as the channel for measuring.

Track:

In this mode, the screen displays two cross cursors. The cross cursor sets the position on the waveform automatically. Adjust the horizontal position of cursor on the waveform by click the oscilloscope displays the values of the coordinates on the boxes below the menu.

button or drag the cursor on the screen. The

NOTE: The Auto Measure mode for Cursor measuring will take no effect without

automatic measurements.

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Comments of Cursor Measurements

1. Auto Cursor Mode:

Table 2-30 Auto Cursor Measurement

Function Setting Description

Display the cursors for the current

Mode Auto

The cursors position

automatic measuring. (See the following figure)

Figure 2-44

Auto Measure Mode of Cursor Measurement

There will be no cursor display if no parameter is chosen in the M

easure menu. The oscilloscope could move cursor automatically to measure 20 parameters in the M

easure menu.

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User’s Guide for VS5000 Series

2. Manual Cursor Mode

Manual Measure Mode of Cursor Measurement

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Figure 2-45

Table 2-31 Manual Cursor Measurement

Function Setting Description

Shown as vertical line to measure the horizontal parameters Shown as horizontal line to measure the vertical parameters

Type

X

Y

CH1

Source

CH2

MATH (1, 2,

3 and 4)

Select the measurement signal source. (LA is applicable for VS5***D only)

LA

In this mode, the oscilloscope measures the Y or X coordinate values of the cursors, and the increments between the two cursors.

Please do as the following steps:

1) Select the Manual Cursor mode for cursor measurement; click the buttons as:

Analyze Æ Cursor Æ Manual Cursor.

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2) Select channel Source for measurements, click the buttons as:

Source Æ CH1, CH2, MATH (1, 2, 3 and 4) or LA (for VS5***D only).

3) Select the Cursor type by clicking the appropriate buttons; in the Manual Cursor

window, there are X and Y operation windows to select the cursor type.

4) Move the cursors to adjust the increment between the cursors: (Details in the

following Table)

Table 2-32 Definition of the Manual Cursors

Increment Cursor Operation

X

Y

Cursor A Cursor B

Click the button to adjust the cursor A and B horizontally.

Click the

button to adjust the

cursor A and B vertically.

NOTE: Cursor could be moved only when the cursor function menu is displayed.

5) To get measurement values: z Position of Cursor 1 (time cursor centered on the midpoint of screen; Voltage

cursor centered on channel ground level).

z Position of Cursor 2 (same as above). z Horizontal space between cursor 1 and 2 (

△X): Time between cursors (1/△X),

units in Hz, kHz, MHz, GHz.

z Vertical space between cursor 1 and 2 (

△Y): Voltage between cursors.

If the source is LA (for VS5***D only), the measurement value is as follows:

z Position of Cursor 1 (time cursor centered on the midpoint of screen). z Position of Cursor 2 (time cursor centered on the midpoint of screen). z Cursor 1 value: Hex. z Cursor 1 value: Binary. z Cursor 2 value: Hex. z Cursor 2 value: Binary.

NOTE: The values will be automatically displayed on the right upper corner of screen

when the cursor function menu is hidden or displaying other menus.

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Key Points Cursor Y: Cursors Y appears as horizontal lines on the display to measure the

vertical parameters. Usually it is used to measure the Volts. When the source is set as function, the units are assigned to the function.

Cursor X: Cursors X appears as vertical line on the display and measure the

horizontal parameters. Usually it indicates the time of trigger excursion. When the source is set as FFT, X means frequency.

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3． Track Cursor Mode

Interface of Track Cursor Measurement

Figure 2-46

Table 2-33 Track Cursor Measurement Functions

Function Setting Description

On/Off Turn the Cursor A or B on/off.

Cursor A

Cursor B

CH1 CH2

Set Cursor A in conjunction with CH1 or CH2. Adjust the cursor A horizontally.

Set Cursor B in conjunction with CH1 or CH2. Adjust the cursor B horizontally.

In cursor track mode, the cursor A and cursor B move together with the selected waveform.

Please do as the following steps:

1) Select the Track Cursor mode for cursor measurement; click the buttons as

follows: Analyze Æ Cursor Æ Track Cur s o r.

2) Select channel Source for measurements; click the buttons as follows:

Source Æ CH1 or CH2.

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3) Move the cursors to adjust the increment between the cursors: (Details in the following Table)

Table 2-34 Definition of the Track Cursor

Cursor Operation

A (cursor A)

B (cursor B)

Click the horizontally.

button to adjust the cursor A

button to adjust the cursor B

NOTE: Moving cursor horizontally is not allowed when other (not tracking cursor)

menu is activated.

4) To get measurement values:

z Position of Cursor 1 (Time cursor centered on the midpoint of screen; Voltage

cursor centered on channel ground level).

z Position of Cursor 2 (Time cursor centered on the midpoint of screen; Voltage

cursor centered on channel ground level).

z Horizontal space between cursor 1 and 2 (

Second, (1/

△X), units in Hz, kHz, MHz, GHz.

z Vertical space between cursor 1 and 2 (

△X): Time between cursors, units in

△Y): Voltage between cursors, units in

V.

NOTE:

Cursor A and B can be dragged on screen.

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To Set the Utility Function

Click the U

System functions setup menu

tility button to get into the Utility menu.

Figure 2-47 The Menu of Utility

Click the U

tility button to show the menu of the settings of in the Utility system.

Table 2-35 Utility Functions

Function Setting Description

Display Set the display functions

Self Calibration

Execute Self Calibration

Pass/Fail Setup Pass/Fail test

Record Setup waveform Record

Help Get the help of VS5000 series

About

Get the instrument information of this VS5000

NOTE: Self Calibration: Oscilloscope will calibrate parameters of the vertical system (CH1,

CH2, and Ext), the horizontal system and the trigger system.

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User’s Guide for VS5000 Series

The Display Setup

Click the Display button in the Utility menu, to show the Display window.

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Display Setting Interface

Table 2-36 Display Setting

Function Setting Description

Type

Grid

Vectors Color Grade

On/Off Intensity

Persistence

Waveform

Intensity

Figure 2-48

Display waveforms as vectors or dots Use color express the density of dots

Turn the grids On or Off Adjust brightness of the grids

The sample points remain displayed until turn the persistence “OFF” or click the Clear button Adjust brightness of the persistence waveform

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Self Calibration

The Self Calibration adjusts the internal circuitry to get the best accuracy. Use these functions to calibrate the vertical and horizontal systems.

For maximum accuracy at any time, run this calibration if the ambient temperature changes by 5℃ or more.

Before running this procedure, do these steps:

1. Disconnect any probes or cables from all channel inputs, otherwise failure or damage to the oscilloscope may occur.

2. Click the Self Calibration button in the Utility menu.

Figure 2-49

Self Calibration Interface

NOTE:

The oscilloscope must have been working or warm-up at least 30-minutes before running self-calibration to get best accuracy.

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User’s Guide for VS5000 Series

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Pass/Fail

The Pass/Fail function monitors changes of signals and outputs pass or fail signals by comparing the input signal with the pre-defined mask.

Click the Pass/Fail button in the Utility menu to show the Pass/Fail Setup window.

Figure 2-50

Pass/Fail Setting Interface

Table 2-37 Pass/Fail Settings

Function Setting Description

On Off/On

Source

CH1 CH2

FAIL FAIL+BEEPER

Output

PASS PASS+BEEPER

Stop When Pass/Fail

Display Information

Off/On

Off/On Turn the Pass/Fail information off or on

Turn off or on the Pass/Fail test

Select Pass/Fail test on CH1 Select Pass/Fail test on CH2 Output when Fail condition detected

Output and beep when Fail condition detected Output when Pass condition detected Output and beep when Pass condition detected

Continue test when output occurs Stop test when output occurs

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g

Mask Setting

Use the operations in Setup and Mask windows to set the Pass/Fail mask.

Table 2-38 Mask Settings

Function Setting Description

Create

Vertical

Horizontal

Create a Pass/Fail mask as the followin Vertical and Horizontal settings

Set vertical clearance to the waveform (0.04div-4.00div)

Set horizontal clearance to the waveform (0.04div-4.00div)

Save Save this Pass/Fail mask as a file

Load Load a Pass/Fail mask file

Table 2-39 Operation Settings

Function Setting Description

Run Start the Pass/Fail function

Stop Stop the Pass/Fail function

NOTE: Pass/Fail function is unavailable in X-Y mode.

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Waveform Record

Waveform recorder records input waveform from CH1, CH2 and Pass/Fail Out with a maximum record length of 1000 frames. This performance can also be activated by the Pass/Fail test output, which makes this function especially useful to capture abnormal signals in long term without keeping an eye watching it.

Click the Record button in the Utility menu.

Stop button

Run button

Fast Forward and Backward buttons

Record button

Set Repeat or Single time play mode

Current frame

Figure 2-51

Waveform Recording Interface

Waveform recorder: Record the waveforms with specified interval.

Table 2-40 Waveform Recording Functions

Function Setting Description

Select record source channel Set number of record frames, the max frames are 1000 Set save path of the Record file Set time interval between record frames Set play path of the Record file

Record Setup

Play Setup

Select Source Max Frames

Save Path Time Interval

Play Path

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To Use Run Control Buttons

The Run Control buttons include and / .

:

The signal.

Auto-set functions

After the button is clicked the oscilloscope is configured to the following

defaults:

features automatic adjustments to produce a stable display of the input

Table 2-41 Auto-set Functions

Function Setting

Display format Y-T

Acquire mode Normal

Vertical coupling Adjust to AC or DC according to the signal.

Vertical “V/div” Adjusted

Volts/Div Coarse

Bandwidth limit Full

Signal Invert OFF

Horizontal position Center

Horizontal “S/div” Adjust to right position

Trigger type Edge

Trigger source

Find the channel with input signal automatically.

Trigger coupling DC

Trigger voltage Midpoint setting

Trigger mode Auto

knob

Trigger offset

/ :

Run or Stop waveform acquiring. NOTE:

In STOP status, the volts/div and horizontal time base can be adjusted in a fixed limit, to zoom in/out the signal in vertical and horizontal directions.

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User’s Guide for VS5000 Series

Rigol Technologies VS5000, VS5000D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual