BK Precision BK Precision 2557 Manual

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Model: 2552, 2553, 2554, 2555, 2556,

2557, 2558, 2559

4CH/2CH Digital Storage Oscilloscopes

USER MANUAL

99 Washington Street Melrose, MA 02176

Phone 781-665-1400 Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Safety Summary

The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instr uctions and become familiar with the operating instructions for this instrument.

If this device is damaged or something is missing, contact the place of purchase immediately.

This manual contains information and warnings must be followed to ensure safe operation as well as to maintain the oscilloscope in a safe condition.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical gro und. This instrument is grounded thr ough the ground conductor of the supplied, threeconductor ac power cable. The power cable must be plugged into an approved three-conductor electrical outlet. Do not alter the ground connection. Without the prote ctive ground connection, a ll accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoi d injuries, always disconnect power and discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt any internal service or adjustment unl ess another

Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards.

To avoid electrical shock hazard, disconnect power cord before removing covers. Refer servicing to qualified personnel.

Before connecting the line cord to the AC mains, check the rear panel AC line voltage indicator. Applying a line voltage other than the indicated voltage can destroy the AC line fuses. For continued fire protection, replace fuses only with those of the specified voltage and current ratings.

This product uses components which can be damaged by

static discharge (ESD). To avoid damage, be sure to follow proper procedures for handling, storing and transporting parts and subassemblies which contain ESD-sensitive components.

person, capable of rendering first aid and resuscitation, is present.

DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT

Do not install substitute parts or perform any unauthorized

modifications to this instrument. Return the instrument to B&K

Precision for service and repair to ensure that safety features are

maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, suc h as the following

examples, denote a hazard and appear throughout this manual.

Follow all instructions containe d in these statements.

A WARNING statement calls atte ntion to an operating procedure,

practice, or condition, which, i f not followed correctly, could

result in injury or death t o personnel.

A CAUTION statement calls attention to an operating procedure,

practice, or condition, which, i f not followed correctly, could

result in damage to or destruction of part or all of the product.

WARNING:

CAUTION:

electro-

Compliance Statements

This product is subject to Directive

Disposal of Old Electrical & Elect r onic Equipment (Applicable in the European Union and other European countries with separate collection systems)

2002/96/EC of the European Parliament and the Council of the European Union on w aste electrical and electronic equipment (WEEE) , and in jurisdicti ons adopting that Directive, is marked as being put on the market a fter August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.

Safety Symbols

This symbol is used to denote the measurement ground

connection.

Electrical Shock hazard.

This symbol on an instrument indicates caution. For details, the user should refer to the operating instructions i n the manual.

On (Power). This is the In position of the power switch

This symbol shows that the switch is a power switch located

CAT I

IEC Measurement Category I.

when instrument is ON.

Off (Power). This is the Out position of the power switch

when instrument is OFF.

at the top of the oscilloscope. Pressing this button toggles the oscilloscope’s state between operation and power off mode.

(400V)

NOTES:

All references and functionality related to CH3 (channel 3) and CH4 (channel 4) in this manual are available on 4CH models 2553, 2555, 2557, and 2559. They are not available for 2CH models 2552, 2554, 2556 and

2558.

Inputs may be connected to mains (up to 400 VAC) und er Category I overvoltage conditions.

Table of Contents

SAFETY SUMMARY ...................................................................... 3

CHAPTER 1 INTRODUCTION ....................................................... 10

ANEL AND DISPLAY INFORMATION .................................................... 11

Front Panel ........................................................................................ 11

Back Panel ......................................................................................... 12

Display Information .......................................................................... 13

ACKAGE CONTENTS ........................................................................ 15

P C

HECKING FUNCTIONS ..................................................................... 15

ROBE SAFETY ................................................................................ 17

ROBE ATTENUATION ...................................................................... 18

ROBE COMPENSATION .................................................................... 19

CHAPTER 2 FUNCTIONS AND OPERATING DESCRIPTIONS ........... 20

ENU AND CONTROL BUTTON .......................................................... 21

ONNECTORS ................................................................................. 23

C A

UTO SETUP ................................................................................... 24

EFAULT SETUP .............................................................................. 26

NIVERSAL KNOB ............................................................................ 27

ERTICAL SYSTEM ............................................................................ 28

HANNEL FUNCTION MENU .............................................................. 29

Setting Up Channels .......................................................................... 32

SING VERTICAL POSITION KNOB AND VOLTS/DIV KNOB ....................... 36

ATH FUNCTIONS ........................................................................... 37

FFT Function ...................................................................................... 38

Displaying the FFT Spectrum ............................................................. 40

Select FFT Window ............................................................................ 41

Magnifying the FFT Spectrum .......................................................... 42

Measuring an FFT Spectrum Using Cursors ...................................... 42

SING REF ..................................................................................... 45

U H

ORIZONTAL SYSTEM ....................................................................... 47

Horizontal Control Knob .................................................................... 47

Window Zone .................................................................................... 48

RIGGER SYSTEM ............................................................................. 49

Signal Source ..................................................................................... 50

Trigger Type ...................................................................................... 50

Coupling ............................................................................................ 68

Position ............................................................................................. 68

Slope and Level ................................................................................. 68

Trigger Holdoff .................................................................................. 69

IGNAL ACQUISITION SYSTEM ............................................................ 70

S D

ISPLAY SYSTEM ............................................................................. 75

X-Y Format ........................................................................................ 79

EASURE SYSTEM ........................................................................... 80

Scale Measurement .......................................................................... 80

Cursor Measurement ........................................................................ 81

Auto Measurement ........................................................................... 86

TORAGE SYSTEM ............................................................................ 93

S U

TILITY SYSTEM ............................................................................ 107

System Status .................................................................................. 111

Language ........................................................................................ 111

Self Calibration ................................................................................ 112

Self Test ........................................................................................... 113

Updating Firmware ......................................................................... 116

Pass/Fail .......................................................................................... 117

Waveform Recorder ........................................................................ 121

Record ............................................................................................. 126

ELP MENU ................................................................................. 129

CHAPTER 3 REMOTE CONTROL ................................................ 131

CHAPTER 4 APPLICATION EXAMPLES ....................................... 132

AKING SIMPLE MEASUREMENTS ..................................................... 133

T M

EASURING RING FREQUENCY ........................................................ 134

Measuring Ring Amplitude ............................................................. 135

APTURING A SINGLE EVENT ............................................................ 135

C A

NALYZING SIGNAL DETAILS ............................................................ 136

Looking at a Noisy Signal ................................................................ 136

Separating the Signal from Noise ................................................... 137

RIGGERING ON A VIDEO SIGNAL ..................................................... 137

Triggering on Video Field ................................................................ 137

Triggering on Video Lines ................................................................ 137

APPLICATION OF X-Y FUNCTION ....................................................... 138

NALYZING A DIFFERENTIAL COMMUNICATION SIGNAL ....................... 139

CHAPTER 5 MESSAGE PROMPTS AND TROUBLESHOOTING....... 141

ESSAGE PROMPTS ...................................................................... 141

M T

ROUBLESHOOTING ....................................................................... 142

CHAPTER 6 SPECIFICATIONS .................................................... 144

PECIFICATIONS............................................................................. 144

S C

ERTIFICATION .............................................................................. 151

APPENDIX A DEFAULT SETUP................................................... 152

APPENDIX B INDEX ................................................................. 155

APPENDIX C DISABLING AUTO FUNCTION ................................ 156

SERVICE INFORMATION .......................................................... 157

LIMITED THREE-YEAR WARRANTY ........................................... 158

Chapter 1 Introduction

The 2550 series digital storage oscilloscopes (DSO) are portable benchtop instruments used for making measurements of signals and waveforms. This chapter will highlight information on the follo wing:

• Panel and display information

• Package Contents

• Checking functions

• Probe Attenuation

• Probe Compensation

Panel and Display Information

3 1 15

Figure 1 - 4 channel (top) and 2 channel (bottom) front panels

Front Panel

The following contents are a brief intro duction for the front panel function, which is useful to become familiar with the operation of the DSO.

1. Power On/ Off button

2. USB Host port (for storage to USB flash drives)

3. LCD display

4. 1 kHz probe compensation terminal

5. Menu On/Off button

6. Function keys

7. Print button

8. Universal kno b

9. Cursor, Measure, Acquire, Display, Save/Recall, Utility menu

buttons

10. Help and default setup button

11. Run Contro l s (Single, Run/Stop)

12. Horizontal Controls (Time/div, horizontal position, Horizontal

menu)

13. Auto set button

14. Trigger Controls (Trigger menu, Set to 50%, Force, Trigger level)

15. External trigger BNC

16. 2CH/4CH BNC inputs

17. Vertical Controls (Volts/div, ver tic a l position, CH1 & CH2 or

CH1, CH2, CH3, CH4, On/Off, Math function, Reference

function)

Back Panel

The following shows the back panel connections of the DSO.

1. Rubber feet

1 2 3

6 7 8 9 10

2. Kensington security slot

3. Pass/Fail BNC output

4. LAN interface

5. USB device port (for remote communication)

6. Rear USB host port (for storage to USB flash drives)

7. Main AC power switch

8. Input fuse holder

9. AC line inp ut

10. Carrying hand le

Display Information

Figure 5 - Display Screen

1. Trigger status

• Armed - The oscilloscope is acquiring pre-trigger data.

All triggers are ignored in this state .

• Ready - All pre-trigger data has been acquired and the

oscilloscope is ready to accept a trigger.

• Trig’d - The oscilloscope has seen a trigger and is

acquiring the post-trigger data.

• Stop - The oscilloscope has stopped acquiring wave fo r m

data.

• Auto - The oscilloscope is in auto mode and is acquiring

wavefor ms in the absence of triggers.

• Scan - The oscilloscope is acquiring and displaying

wavefor m data continuous ly in scan mod e. This mode occurs when oscilloscope is looking for a signal or when timebase is set slow enough in which the scope requires longer time to “scan” in order to acquire the entire signal on display.

2. Displays position of the present waveform window in internal

memory.

3. Marker shows horizontal trigger position. Turn the

HORIZONTAL POSITION KNOB to adjust the position of the

marker.

4. Print Key – Indicates whether the PRINT KEY option is set to

print picture or save picture.

• “Print Key” option is set to “Save Picture ”

5. Back USB – Indicates whether the BACK USB option is set to

Computer/USBTMC or Printer.

• “Back USB” option is set to “Computer”.

• “Back USB” option is set to “Printer” (not available)

6. Waveform channel number tag.

7. On-screen markers show the ground reference points of the

displayed waveforms. I f t here is no mar ker, the channe l is not

displayed. Display signal source.

8. Signal Coupling Symbol

9. Vertical scale factor of corresponding channels.

10. Indicates whether the bandwidth limiting filter is “On” or “Off”.

The “B” icon indicates the filter is On.

11. Main time base scale setting

12. Horizontal position of main time base waveform.

13. Shows the icon for the tri gger type

14. Displays real time and date

15. Shows the trigger volt age

16. Trigger signal frequency

Package Contents

The digital storage oscilloscopes are shipped with the following contents:

• 2550 series Digital Storage Oscilloscope

• User Manual

• USB (Type A to B) communication cable

• AC Power Cord

• Four 10:1 passive oscilloscope probes for 4 channel models, two

probes for 2 channel models

• Certificate of Calibration

Please locate each item from the original packaging and contact B&K Precision immediately if something is missing.

Checking Functions

Please follow the steps below when checking the oscilloscope’s

functionality.

1. Power on the oscilloscope.

Press “DEFAULT SETUP” to set to factory default settings. The

probe default attenuation is 1X.

Figure 6 - Scope Layout

2. Set the switch to 1X on the probe and connect the probe to channel

1 on the oscilloscope. To do this, align the slot in the probe

connector with the key on t he CH 1 BNC, p ush to connect, and

twist to the right to lock the probe in place. Connect the probe tip

and reference lead to the PROBE COMP connectors.

Figure 7 - Probe Compensation

3. Press “AUTO” to show the 1 kHz frequency and about 3V peak-

peak square wave in couple seconds.

Figure 8 - 3Vpp Square Wave

4. Press “CH1” two times to cancel the channel 1, Press“CH2” to

change screen into channel 2, reset the channel 2 as step 2 and step

3. Do the same for 4CH models by pressing “CH3” and “CH4”

for channel 3 and channel 4 respectively.

Probe Safety

A guard around the probe body provides a finger barrier for protection from electric shock.

Figure 9 - Probe

Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements.

Note： To avoid electric shock when using the probe, keep fingers behind

Note. The default setting for the Probe option is 1X.

Note. When the attenuation switch is set to 1X, the probe limits the

the guard on the probe body.

To avoid electric shock while using the probe, do not touch metallic

portions of the probe head while it is connected to a voltage source. Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements.

Probe Attenuation

Probes are available with various attenuation factors which affec t the vertical scale of the signal. The Probe Check function verifies that the Probe attenuati on option matches the attenuation of the probe. You can push a vertical menu button (such as the CH 1 MENU button), and select the Probe option that matches the attenuation factor of your probe.

Be sure that the attenuation switch on the probe matches the Probe option in the oscilloscope. Switch settings are 1X and 10X.

bandwidth of the oscilloscope to 10 MHz (according to Probe spec). To use

the full bandwidth of the oscilloscope, be sure to set the switch to 10X.

Probe Compensation

Overcompensated

Compensated Correctly

Undercompensated

As an alternative method to Probe Check, you can manually perform this

adjustment to match your probe to the inp ut channel.

Figure 10 - Probe Compensation Setup

1. Set the Probe option attenuation in the channel menu to 10X. Do

so by pressing CH1 button and selecting “Probe” from menu.

Select 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.

2. Attach the probe tip to the PROBE COMP 3V connector and the

reference lead to the PROBE COMP Ground connector. Display

the channel and then push the “AUTO” button.

3. Check the shape of the displayed waveform.

4. If necessary, adjust your probes compensation trimmer pot. Repeat

as necessary.

Chapter 2 Functions and Operating Descriptions

This chapter will cover all the functions and operations of the oscilloscope:

• Menu and control button

• Connector

• Auto Setup

• Default Setup

• Universal knob

• Vertical System

• Horizontal System

• Trigger System

• Acquiring signals System

• Display System

• Measuring waveforms System

• Utility System

• Storage System

• Online Help function

Menu and Control Button

Figure 11 - Control Buttons (4CH model shown)

hannel buttons (CH1, CH2, CH3, CH4): Press a channel button (CH1,

CH2, CH3, or CH 4) to turn that c hannel ON or OFF and open the Channel menu for that channel. You can use the channel menu to set up a channel. When the channel is ON, the channel button is lit. MATH: Press to display the Math menu. You can use the MATH menu to use the oscilloscope’s Math functions. REF: Press to display the Ref Wave menu. You can use this menu to save and recall reference waveforms to and from internal memory.

HORI MENU: Press to display the Horizontal menu. You can use the Horizontal menu to display the waveform and to zoom a segment of a waveform. TRIG MENU: Press to display the Tr igger menu. You can use the Trigger menu to set the trigger type (Edge, Pulse, Video, Slope, Alternate and trigger settings. SET TO 50%: Press to stabilize a waveform quickly. The oscilloscope can set the trigge r level to be halfway between the minimum and maximum voltage level automatically. This i s useful when you connect a signal to the EXT TRIG connector and set the trigger source to Ext or Ext/5. FORCE: Use the FORCE button to complete the current waveform acquisition whether the oscilloscope detects a trigger or not. This is useful for Single acquisitions and Normal trigger mode. SAVE/RECALL: Press to d i s play the Save/Recall menu. You can use the Save/Recall menu to save and recall up to 20 oscilloscope setups and 20 waveforms to/from internal memory or a USB memor y device (limited b y memory capacity of USB device). You can also use it to recall the default factory settings, to save waveform data as a comma-delimited file (.CSV), and to save t he displayed waveform image. ACQUIRE: Press to display Acquire menu. You can use the Acquire menu to set the acquisition Sampling Mode (Sampling, Peak Detect, Average).

MEASURE: Press to display a menu of measurement parameters. CURSORS: Display the Cursor Me nu. Ver tic a l Position controls adjust

cursor position while displaying the Cursor Menu and the cursors are activated. Cursors remain displayed (unless the “Type” option is set to “Off”) after leaving the Cursor Menu but are not adjustable. DISPLAY: Press to open the Display menu. You can use the Display menu to set grid and waveform display styles, and persistence.

UTILITY: Press to open the Utility menu. You can use the Utility menu to

Figure 12 - Connectors

configure oscilloscope features, such as sound, language, counter, etc. You can also view system status and update software. DEFAULT SETUP: Press to reset the oscilloscope’s settin gs to the default factory configuration.

HELP: Enter the online help system. AUTO: Automatically sets the o scilloscope controls to produce a usable

display of the input signals. RUN/STOP: Continuously acquire s waveforms or stops the acquisition.

Note: If waveform acquisition is stopped (using the RUN/STOP or SINGLE button), the TIME/DIV contro l expands or compresses the waveform.

SINGLE: Acquire a single waveform and then stops.

Connectors

Channel Connector (CH1, CH2, CH3, CH4): Input conne ctors for waveform display. EXT TRIG: Input connector for an external trigger source. Use the Trigger Menu to select the “Ext” or “Ext/5” trigger source. Probe Compensation: 1 kHz voltage probe compensation output and ground. Use to electrically match the probe to the oscilloscope input circuit.

Note: Do not connect a voltage source to the ground terminal or

it may damage the oscilloscope.

Auto Setup

The 2550 series Digital Sto rage Oscilloscopes have an Auto Setup function that identifies the wave fo rm types and automatically adjusts controls to produce a usable display of the input signal. Press the AUTO front panel button, and t hen press the menu option button adjacent to the desired waveform as follows:

Figure 13 - Auto Setup

Note: For AUTO set to function properly, the signal frequency must be > 5 Hz. There will be a short time delay when using AUTO to setup 4 channels.

Table 1 - Autoset Menu

Option

Description

Auto set the screen and display

Set the screen and auto display single

Auto set and show the risi ng time.

Auto set and show the falling time.

Causes the oscilloscope to recall the

Function

Setting

Acquire Mode

Adjusted to Sampling

Display Format

Y-T

Display Type

Set to Dots for a video signal, set to Ve c tors

Vertical Coupling

Adjusted to DC or AC according to the Bandwidth Limit

Off(full)

V/div

Adjusted

(Multi-cycle sine)

(Single-cycle sine)

multi-cycle signal.

cycle signal.

(Rising edge)

(Falling edge)

(Undo Setup)

previous setup.

Auto set determines the trigger source based on the following conditions:

• If multiple channels have signals, the channel with the lowe st

frequency signal.

• No signals found, the lowest-numbered channel displayed when

Auto set wa s invoked

• No signals found and no channels displayed, oscilloscope displays

and uses channel 1.

Table 2 - Autoset Function Menu Items

for an FFT spectrum; otherwise, unchanged

input signal

VOLTS/DIV

adjustability

Coarse Signal inver ted

Off

Horizontal position

Center

TIME/DIV

Adjusted

Trigger type

Edge

Trigger so urce

Auto detect the channel which has the input Trigger slope

Rising

Trigger mode

Auto

Trigger coupling

Trigger holdoff

Minimum

Trigger le vel

Set to 50%

signal

Note: The AUTO button can be disabled. Please see “Appendix C Disabling Auto Function” for deta ils.

Default Setup

he oscilloscope is set up for normal operation when it is shipped from the

factory. This is the default setup. To recall this setup, press the DEFAULT SETUP button. For the default options, buttons, and controls, when you pre s s the DEFAULT SETUP button, refer to “Appendix A Default Setup”. The DEFAULT SETUP butto n does not reset the following settings:

• Language option

• Saved reference waveform files

• Saved setup files

• Display contrast

• Calibration data

Universal Knob

Figure 14 - Universal Knob

ou can use t he Universal k nob with many functions, such as adjusting the hold of f t ime, moving cursors, setting t he pulse widt h, setting the video line, adjusting the upper and lo wer frequency limit and adjusting X and Y masks when using the pass/fail function. You can also turn the Universal knob to adjust the storage position of setups, waveforms, pictures when saving/recalling, and to select menu options. With some functions, the light indicator ab ove the knob will turn on to indicate that the knob can be used to make changes or adjustments for that functio n. The knob can also be pushed to make a selection after changes/adjustments have been made.

Vertical System

Figure 15 - Vertical System Controls

The vertical control could be used for displaying waveform, rectify scale and position.

Channel Function Menu

Option

Setting

Description

Coupling

DC passes both AC and DC components of the

BW Limit

Off

Disables bandwidth limit.

Volts/Div

Coarse

Selects the resolution of the Vo lts/Div knob

Probe

1000X

Set to match the type of probe you are using to

Page 1/3

Press this button to enter second page menu.

Option

Setting

Description

Invert

Turn on inve rt function.

Input

Set input impedance to 1MΩ.

Table 3 - Channel Function Menu

GND

Fine

10X 100X

Table 4 - Channel Function Menu 2

input signal. AC blocks the DC component of the input signal and attenuates signals below 10 Hz. GND disconnects the input signal.

Enables bandwidth limit.

Coarse defines a 1-2-5 sequence. Fine changes the resolution to small steps between the coarse settings.

ensure correct vertical readouts.

Off

50Ω

Turn off invert function.

Set input impedance to 50 Ω

Filter

Press this button to enter the “Digital Filter

menu”.

Page 2/3

Press this button to e nter the third page menu.

Option

Setting

Description

Unit

V A Set the scale unit to voltage. Skew

0 – 100 ns

Set the skew time between two channels.

Page 3/3

Press this button to return the first page menu.

Table 6 - Digital Function Menu

Table 5 - Channel Function Menu 3

Set the scale unit to current.

Option

Setting

Description

Filter

Off

Turn on the digital filter.

Type

Setup as LPF (Low Pass Filter).

Upp_limit

Turn the “Universal” kno b to set upper limit.

Low_limit

Turn the “Universal” knob to set lower limit.

Return

Return to digital filter main menu.

Note： ● The oscilloscope’s vertical response rolls off slowly above its

Turn off the digital filter.

Setup as HPF (High Pass Filter). Setup as BPF (Band Pass Filter). Setup as BRF (Band Reject Filter).

• “GND” Coupling: Use GND coupling to display a zero-volt

waveform. Internally, the channel input is connected to a zero-volt reference level.

• Fine Resolution: The vertical scale readout displays the actual

Volts/Div setting while in the fine re solution setting. Changing the setting to coarse does not change the vertical scale until the VOLTS/DIV control is adjusted.

specified bandwidth. Therefore, the FFT spectrum can show valid frequency information higher than the oscilloscope’s bandwidth. However, the magnitude information near or above the bandwidth will not be accurate.

● If the channel is set to DC couplin g, you can quickly measure the DC component of the signal by simply noting its distance from the ground symbol.

● If the channel is set to AC coupling, the DC component of the signal is blocked allowing you to use greater sensitivity to display the AC component of the signal.

Setting Up Channels

Each channel has its own separate Menu. The items are set up separately according to each channel.

1. Setup Channel Coupling

Take CH1 for example; the tested signal is a sine wave signal with DC deflection:

• Press“CH1”→“Coupling”→“AC”, Set to AC couple mode.

This will block the DC component of the input signal.

• Press“CH1”→“Coupling”→“DC”, Set to DC couple mode.

Both DC and AC components of the input signal will be captured.

• Press“CH1”→“Coupling”→“GND”, Set to GROUND mode.

This disconnects the input signal.

Figure 16 - DC Coupling

2. Bandwidth Limiting

Take CH1 for example:

• Press “CH1”→“BW Limit”→ “On”, and bandwidth will be

limited to 20 MHz.

• Press“CH1”→“BW Limit”→ “Off”, and bandwidth limit

will be disabled.

Figure 17 - Bandwidth Limit

3. Volts/Div Settings

Vertical scale adjust have Coarse and Fine modes, Vertical sensitivity range of 2 mV/div – 10 V/div.

Take CH1 for example:

• Press“CH1”→“Volts/Div”→“Coarse”. I t is the d e fault setting of

Volts/Div, and it makes the vertic a l sca ling in a 1-2-5-step sequence from 2 mV/div, 5 mV/div, 10 mV/div to 10 V/div.

Figure 18 - Coarse Control

• Press CH1”→ Volts/Div”→ Fine”. This setting changes the vertical control to small steps between the coarse settings. It wil b

e helpful when you need to adjust the waveform vertical size in

smaller steps.

4. Setting Probe Attenuation

In order to set the attenuation coefficient, you need to specify it in the channel operation Menu. If the attenuation coefficient is 10:1, the input coefficient should be set to 10X, so that the Volts/div information and measurement testing is correct. Take CH1 fo r example, when you use the 100:1 probe:

• Press“CH1”→“Probe” →“100X”

igure 19 - Setting Probe Attenuation

nverting waveforms

5. I

Take CH1 for example:

• Press“CH1”→”N ext Page page 1/2” →“Invert”→“On”:

Figure 20- Invert Waveform Screen

6. Using the Digital Filter

Press “CH1”→“Next Page page 1/2”→ “Filter”, display the digital filter menu. Select “Filter Type”, then select “Upper Limit” or “Lower Limit” and t urn the “Unive rsal” knob to adjust them.

• Press “CH1”→“Next Page page 1/2”→ “Filter” →“Off”.

Turn off the Digital Filter function.

Figure 21 - Digital Filter Menu

• Press “CH1”→ “Next Page page1/2”→ “Filter” → “On”.

Turn on the Digital Filter function.

Figure 22 - Digital Filter Adjustment Screen

Using Vertical Position Knob and Volts/div Knob

• Vertical “POSITION” knob

1. Use the Vertical “POSITION” knobs to move the channel

wavefor ms up or down on the screen. This button’s reso lution varies based on the vertical scale.

2. When you adjust the vertical position of channel waveforms,

the vertical position information will display on the bottom left of the screen. For example “Volts Pos=24.6mV”.

3. Press the vertical “POSITION” knob to set the vertical

position to zero.

• “Volts/div” knob

1. Use the “Volts/div” knobs to co ntrol how the oscilloscope

amplifies or attenuates the source signal of channel waveforms. When you turn the “volts/div” knob, the oscilloscope increases or decreases the vertical size of the waveform on the screen with respect to the ground level;

2. When you press the “Volts/div” Knob, you can switch

“Volts/div” option between “Coarse” and “Fine”. The vertical scale is set by th e 1-2-5 step in Coarse mode. Increase by turning the knob in the clockwise direction and

decrease by turning the knob in the counterclockwise

Function

Setting

Description

Operation

+, -. *, /, FFT

Math operations between Source A

Source A

CH1 – CH4

Select CH1, CH2, CH3*, or CH4* as

Source B

CH1 – CH4

Select CH1, CH2, CH3*, or CH4* as

Invert

Invert the M ath wa veform.

Page 1/2

Enter the second page of MATH

Function

Setting

Description

Use universal knob to adjust the

waveform.

Page 2/2

Go back to first page of MATH menu.

direction. In Fine mode, the knob changes the Volts/Div scale in small steps between the coarse settings. Again, increase in the clockwise direction, decrease in the counterclockwise direction.

Math Functions

Math shows the results after +,-,*, /, and FFT operation between two channels, from CH1 to CH4 (CH3 and CH4 available for 4CH models only). Press the MATH button to displa y the math waveform and menu. Press the MATH button again to remove the math waveform display.

Table 7 - Math Function Menu

and Source B.

Source A.

Source B.

Off

*4CH models only

Turn off Inve rt function.

menu.

vertical position of the MATH

Use universal knob to adjust the vertical scale of the MATH waveform.

Operation

Setting

Description

Source A waveform adds Source B waveform.

Source A waveform is subtracted Source A multipl y Sourc e B

Source A di vides Source B

FFT

Fast Fourier Transform.

＋ A+B

Table 8 - Math Function Description

－ A-B

* A*B

/ A/B

from Source B waveform.

Figure 23- Math Waveform

FFT Function

The FFT process mathematically converts a time-domain signal into its frequency components. You can use the M ath FFT mode to view the following types of signals:

• Analyze the harmonic wave in a power cable.

• Test the harmonic content and d istortion in a system

• Show the Noise in a DC power supply

FFT Option

Setting

Description

Source

CH1, CH2, CH3*, CH4*

Select this channel as the FFT source.

Window

Hanning

Select FFT window types.

FFT ZOOM

Changes the horizontal magnification of the

Page 1/2

Enter the second page of FFT menu.

FFT Option

Setting

Description

Scale Vrms

Set Vrms to b e the Ve rtical Scale unit.

dBVrms

Set dBVrms to be the vertical Scale u nit.

Split Full screen

Display FFT waveform on half screen. Display FFT waveform on full screen.

Page 2/2

Return to the first page of FFT menu.

• Test the filter and pulse response in a system

• Analyze vibration

Table 9 - FFT Function Menu 1

Hamming Rectangular Blackman

2X 5X 10X

*4CH models only

Table 10 - FFT Function Menu 2

Display

To use the Math FFT mode, you need to perform the following tasks:

1. Set up the source (time-domain) wa veform.

2. Press the AUTO button to display a YT waveform.

3. Turn the vertical “POSITION” knob to move the YT

waveform to the center vertically (zero divisions).

4. Turn the horizontal “POSITION” knob to position the part

of the YT waveform that you want to analyz e in the center eight divi sions of the scr een.

FFT display.

5. The oscilloscope calculates the FFT spectrum using the

center 1024 points of the time-domain wavefor m.

6. Turn the “Volts/div” knob to ensure that the entire

waveform remains on the screen.

7. Turn the “Time/div” knob to provide the resolution you

want in the FFT spectrum.

8. If possible, set the oscilloscope to display many signal

cycles.

To display FFT correctly, follow these steps:

1. Push the “MATH” button.

2. Set the “Operation” option to FFT.

3. Press the “Source” button to select “CH1”, “CH2”, “CH3”, or

“CH4” according to input signal channel. (CH3 and CH4 available for 4CH models only)

4. According to Nyquist law, turn the “Time/div” knob to adjust

the sampli ng rate (this parameter is displayed behind the time base parameter), making sure it is at least double the input signal freque nc y.

Displaying the FFT Spectrum

Press the MATH button to display the Math Menu. Use the options to select the Source channel, Window algorithm, and FFT Zoom factor. You can display only one FFT spectrum at a time. You can select “Full screen” or “Split” in “Display” option to display FFT waveform on full screen or display channel waveform and its FFT waveform on half screen at a time.

Figure 24 - Math Function Screen

Window

Characteristics

Applications

Rectangular

Best frequency resolution,

Symmetric transients

slo wly var ying

Set dBVrms to

Time base

Sampling

be the vertical Scale unit

Select FFT Window

Windows reduce spectral leakage in the FFT spectrum. The FFT assumes that the YT waveform repeats forever. With an integral number of cycles, there are no discontinuities in the signal shape. A non-integral number of cycles in the YT waveform cause the signal start and end points to be at different amplitudes. The transitions between the start and end points cause discontinuities in the signal that introduce high-fre q ue nc y tr ansi e nts.

scale

Table 11 - FFT Window Instruction

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

rate

or bursts. Equal-ampli tude sine waves with fixed frequencies. Broadband random noise with a relatively

spectrum.

Hanning

Hamming

Better frequency, poorer

resolution than Hanning.

Sine, periodic, and Blackman

Best magnitude, worst

Single freque nc y

harmonics.

magnitude a ccuracy than Rectangular. Hamming has slightly better frequency

narrow-band random noise. As y mmetric transients or bursts.

frequency resolution.

Magnifying the FFT Spectrum

You can magnify and use cur sors to take measurements on the FFT spectrum. The oscilloscope includes an “FFT Zoom” option to magnify horizontally, press this option button to select “1X”, “2X”, “5X” or “10X”. Moreover, you also can turn the “Universal” knob to magnify FFT waveform horizontally i n a 1-2-5 step. To magnify vertically, turn the “Volts/div” knob.

Measuring an FFT Spectrum Using Cursors

You can take two measurements on FFT spectrums: magnitude (in dB ) and frequency (in Hz). Magnitude is referenced to 0 dB, where 0 dB equals 1 Vrms. You can use the cursors to take measurements at any zoom factor. Use horizontal cursors to measure amplitude and vertical cursors to measure frequency.

If you input a sine signal to c hannel 1, follow these steps:

1. Measure FFT Amplitude

1. Input a sine signal to channel 1, and press the “AUTO”

button.

2. Press the “MATH” button to enter the “MATH” menu.

3. Press the “Operation” option button to sele ct “FFT”.

4. Press the “Source” option button to select “CH1”.

5. Press CH1 button to display CH1 menu.

6. Turn the “Time/div” knob to adjust sampling rate (at least

double bigger than frequency of input signal).

waveforms, to find higher order

7. If FFT display on full screen, press CH1 button again to

remove channel waveform display.

8. Press the “CUR S OR” button to enter “Cursor” menu.

9. Press the “Cursor Mode” button to select “Manual”.

10. Press the “Type” option button to sele c t “Voltage”.

11. Press the “Source” option button to select “FFT”.

12. Press the “CurA” option button and turn the “Univer s al”

knob to move Cursor A to the highest point of the FFT waveform.

13. Press the “CurB” option button, turn the “Universal”

knob to move Cursor B to the lowest point of the FFT waveform.

14. The amplitude (△V) displays on the top of the left screen.

Figure 25 - Measuring FFT Amplitude

2. Measure FFT Frequency

1. Press the CURSOR button.

2. Press the “Cursor Mode” button to select “Manual”.

3. Press the “Type” option button to select “Time”.

4. Press the “Source” option button to select “FFT”.

5. Press the “CurA” option button and turn the “Univer s al”

knob to move Cursor A to the highest position of the F FT waveform.

6. The value of CurA displayi ng o n the top of the left screen

is the highest Frequenc y. This frequency should be t he same as inpu t signal frequency.

Figure 26 - Measuring FFT Frequency

NOTE：- The FFT of a waveform that has a DC component or offset

can cause incorrect FFT waveform magnitude values. To minimize the DC component, choose AC Coupling on the source waveform.

- To display FFT waveforms with a large dynamic range, use

the dBVrms scale. The dBVrms scale displays component magnitudes using a log scale.

- The Nyquist frequency is the highest fre quency that any

real-time digitizing oscilloscope ca n ac quire without aliasing. This frequency is half that of t he sample rate provided it is within the analog ba ndwidth of the oscilloscope. Frequencies above the Nyquist frequency will be undersampled, which causes aliasing.

Using REF

Option

Setting

Description

Source

CH1,CH2,

*CH4 off

Choose the waveform display to store.

REFA

*REFD

Choose the reference location to store or Save

Stores source waveform to the chosen

REFA

*REFD

Recall the reference waveform on the

The reference control saves waveforms to a nonvolatile waveform memory. The reference function becomes available after a waveform has been saved.

Table 12 - REF Function Menu

*CH3, *CH4 CH1 off CH2 off *CH3 off

REFB *REFC

*Available on 4CH models only

Press the Ref button to display the “Reference waveform menu”.

Off

recall a waveform.

reference location.

screen. Turn off the reference waveform.

Figure 27 - Reference Waveform Menu

Note: - X-Y mode waveforms are not stored as reference waveforms.

Operation step:

1. Press the “REF” menu button to display the “Reference waveform menu”.

2. Press the “Source” option button to select input signal channel.

3. Turn the vertical “POSIT I ON” knob and “Volts/div” knob to adjust the vertical position and scale.

4. Press the third option button to select “REFA” or “REFB” as storage position.

5. Press the “Save” option button.

6. Press the bottom option button to select “REFA On” or “REFB On” to recall the reference waveform.

- You cannot adjust the horizontal position and scale of the

reference waveform.

Horizontal System

Option

Setting

Description

Delayed

Turn on this function for

wavefor m on the screen.

Shown below, there is one button and two knobs in the HORIZONTAL area.

Table 13 - Horizontal System Function Menu

Horizontal Control Knob

You can use the horizontal controls to change the horizontal scale and position of waveforms. The horizontal position readout shows the time represented by the center of the screen, using the time of the trigger as zero. Changing the horizontal scale causes the waveform to expand or contract around the screen center.

• Horizontal “POSITION” knob

• “Time/div” knob

Off

1. Adjust the horizontal position of all channels and

math wavefo rms (the positi on of the trigge r relative to the center of the screen). The resolution of this control varies with the time base setting.

2. When you pr ess the horizontal “POSITION” Knob,

you can set the horizontal position to zero.

main timebase waveform to display on the top half screen and window timebase waveform to display on the below half screen at the same time. Turn off this function to only display main timebase

1. Used to change the horizontal time scale to magnify

or compress the waveform. If waveform acquisition is stopped (using the RUN/STOP or SINGLE button), turn the Time/div knob to expand or compress the waveform.

2. Select the horizontal Time/div (scale factor) for the

main or the window time bas e. When Window Zone is enabled, it changes the width of the window zone by changing the window time b ase.

• Display scan mode:

When the Time/div control is set to100 ms/div or slower and the trigger mode is set to Auto, the oscilloscope enters the scan acquisition mode. In this mode, the waveform display updates from left to right. There is no trigger or horizontal position control of waveforms during scan mode.

Window Zone

Use the Window Zone option to define a segment of a waveform to see more detail. This fu nction behave s like zooming into a portion of the captured waveform. The window time base setting cannot be set slower than the Main time base setting.

You can turn the Horizontal Position and Time/div controls to enlarge or minimize waveforms in the Window Zone.

If you want to see a section of the waveform in details, follow these steps:

1. Press the “HORI MENU” button to enter the “Horizontal menu”.

2. Turn the “Time/div” knob to change the main timebase scale.

3. Press the “Delayed” option button to select “On”.

Figure 28 - Horizontal Delay Menu

4. Turn the “Horizontal Position” knob (adjust window’s position) to select the window that you need and expanded window waveform display will show on the below half of the screen at the same time.

Trigger System

The trigger d etermines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, the oscilloscope converts unstable displays or blank screens into meaningful waveforms. Here are thr ee buttons and one knob in the tr igger area. See below:

• “TRIG MENU” Button: Press the “TRIG M ENU” Button to display the “Trigger Menu”.

• “LEVEL” Knob: The LEVEL knob is to set the corresponding signal voltage of trigger point in ord e r to sample. Press the “LEVEL” knob to set trigger level to zero.

• “SET TO 50%” Button: Use the “SET TO 50%” button to stabilize a waveform quickly. The oscilloscope can set the Trigger Level to be about halfway between the minimum and maximum voltage levels automatically. This is useful when you connect a

signal to the EXT TRIG BNC and set the tr igger source to Ext or

Option

Setting

Description

Type

Edge

With Edge highlighted, the rising or falling edge

Source

CH1

*CH4

Triggers o n a channel whether or not the

Ext/5.

• “FORCE Button: Use the FORCE button to complete the current waveform acquisition whether the oscilloscope detects a trigger or not. This is useful for SINGLE acquisitions and Normal trigger mode.

Signal Source

You can use the Trigger Source options to select the signal that the oscilloscope uses as a trigger. The source can be any signal connected to a channel BNC, to the EXT TRIG BUS, or the AC power line (available only with Edge T rigger).

Trigger Type

The scopes have five trigger types: Edge, Video, Pulse, Slope, and Alternate.

Edge Trigger Use Edge triggering to trigger o n the ed ge of the oscilloscope input signal at the trigger threshold.

Table 14 - Edge Trigger Function Menu

of the input signal is used for the trigger .

CH2

waveform is displayed.

*CH3

EXT

Does not display the trigger signal; the Ext option

uses the signal connected to the EXT TRIG front-

EXT/5

Same as Ext option, but attenuates the signal by a

range.

AC Line

This selection uses a signal der ived from the

Slope

Trigger on R ising edge of the trigger signal.

trigger signal.

Mode

Auto

Use this mode to let the acquisition free-run in

Normal

Use this mode when you want to see only valid Single

When you want the oscilloscope to acquire a

“SINGLE” button.

Set up

Enter the “Trigger Setup Menu” (See below

Option

Setting

Description

Coupling

panel BNC and allows a trigger level range of -

1.2 V to +1.2 V.

factor of five, and allows a trigger level range of +6 V to -6 V. This extends the trigger level

power line as the trigger source; trigger coupling is set to DC and the trigger level to 0 volts.

Trigger on Falling edge of the trigger si gnal. Trigger on R ising edge and F alling edge o f the

the absence of a valid trigger. This mode scans waveform at 100 ms/div or slower time base settings.

triggered wave fo rms; when you use this mod e , the oscilloscope does not display a waveform until after the first trigger.

single capture of a waveform, press the

table).

*Available for 4CH models only.

Table 15 - Trigger Setup Function Menu

DC Passes all components of the signal

Blocks DC components, attenuates signals below 25 Hz.

Attenuates the high-frequency components above 150 kHz.

Blocks the DC component attenuates the lowfrequency components below 8 kHz.

Holdoff

Using the “universal” knob to adjust holdoff time

Holdoff

Reset holdoff time to 100 ns. Return

Return to the first page of “Trigger main men u”.

HF Reject

LF Reject

(sec), the holdoff value is displayed.

Reset

Figure 29 - Trigger Menu Screen

Operating Instructions:

1. Set up Type

- Press the “TRIG MENU” button to display “Trigger” menu.

- Press the “Type” option button to select “Edge”.

2. Set up Source

According to the input signal, press the “Source” option button

to select “CH1”, “CH2”, “CH3”, “CH4”, “EXT”, “EXT/5” or “AC Line”. (CH3 and CH4 available for 4CH models only)

3. Set up Slope

Press the “Slope” option button to select “ ” , “

Option

Setting

Description

Type

Pulse

Select the pulse to trigger

trigger condition.

Source

CH1

EXT/5

Select input signal

” or “ ”.

4. Set up Trigger mode

Press the “Trigger mode” optio n b utto n to sele c t “Auto”, “Normal”, “Single”. Auto: The waveform refreshes at a high speed whether the trigger condition is satisfie d or not. Normal: The waveform refreshes whe n the trigger condition is satisfied and waits for next trigger event occurring when the trigger condition is not satisfied. Single: The oscilloscope acquires a waveform when the trigger condition is satisfied a nd then stops.

5. Set up Trigger coupling

• Press the “Set up” button to enter the “Trigger Setup

Menu”.

• Press the “Coupling” option button to select “DC”,

“AC”, “HF Reject” or “LF Reject”.

Pulse Trigger

Use Pulse Wi dth triggering to trigger on a berrant pulses.

Table 16 - Pulse trigger Function Menu 1

CH2 *CH3 *CH4 EXT

the pulse matching the

source.

When

(Positive pulse width less than

pulse width setting)

Select how to compare

Set Width

20.0 ns~10.0 s

Select to set up pulse

Page 1/2

Press this button to enter the second page.

pulse width setting)

(Positive pulse width larger than pulse width setting)

(Positive pulse width equal to pulse width setting)

(Negative pulse width less than pulse width setting)

(Negative pulse width larger than pulse width setting)

(Negative pulse width equal to

*Available for 4CH models only.

the trigger pulse relative to the value selected in the Set Pulse Width option.

width.

Figure 30 - Pulse Trigger Menu Screen

Table 17 - Pulse Trigger Function Menu 2

Option

Setting

Description

Type

Pulse

Select the pulse to trigger the pulse

Mode

Auto

Select the type of triggering. Normal

Set up

Enter the “T rigger setup menu”.

Page 2/2

Press this button to return to the first page.

matching the trigger c ondition.

Normal single

mode is best for most Pulse Width trigger applications.

Figure 31 - Pulse Trigger Menu 2

Operating Instructions:

1. Set up Type

- Press the “TRIG MENU” button to display “Trigger

menu”.

- Press the “Type” optio n b utton to select “Pulse”.

2. Set up condition

Press the “When” option button to select “

”, “

”, “ ”, “ ”, “ ”or “ ”.

3. Set up pulse width

Turn the “Universal” kno b to set up width.

Option

Setting

Description

Type

Video

Select the video type trigger. Set the

signal.

Source

CH1

*CH4

Select the input source to be the EXT

Ext and Ext/5 use the signa l applied

source.

Polarity

Normal triggers on the negative

Inverted tr iggers on the positive

Sync

All lines

Even Field

Page 1/2

Enter the second page of “Video trigger menu”.

Video Trigger

Trigger on fi elds or lines of standard video signals.

Table 18 - Functional Menu of Video Trigger 1

*Available for 4CH models only.

coupling to AC to trigger the NTSC, PAL and SECAM video

CH2

trigger signal.

*CH3

EXT/5

to the EXT TRIG connector as the

(Normal)

edge of the sync pulse.

(Inverted)

edge of the sync pulse.

Line Num Odd field

Select appropriate video sync.

Option

Setting

Description

Type

Video

Select the video type

signal.

Standard

NTSC Pal/Secam

Select the video standard for sync and line number count.

Mode

Auto

Use this mode to let the

time base setting.

Normal

Use this mode when yo u wa nt to

display a waveform until after the

Figure 32 - Video Trigger Screen

Table 19 - Functional Menu of Video Trigger 2

trigger. Set the coupling to AC to trigger the NTSC, PAL and SECAM video

acquisition free-run in the absence of a valid trigger. This mode allows an untriggered, s canning waveform at 100 ms/div or slower

see only valid triggered waveforms. When you use this mode, the oscilloscope does not

first trigger.

Single

When you want the oscilloscope

press the “SING LE” button.

Set up

Enter the “T rigger setup menu”.

Page 2/2

Return to the first page of “Video Trigger menu”.

to acquire a single waveform,

Figure 33 - Video Trigger Menu 2

Operating Instructions:

Set up Type

1. Press the “T R IG MENU” button to display “Trigger” menu.

2. Press the “Type” option button to sele c t “Video”.

Set up Polarity

1. Press the “Polarity” option button to se le c t “

Set up Synchronization

1. Press the “Sync” option button to select “All Lines”, “Line

Num”, “Odd Field”, and “Even Field”.

2. If you select “Line Num”, you can turn the “Universal” knob

to set the appointed line number.

Set up Standard

1. Press the “next Page Page2/2” option button.

” or “ ”.

2. Press the “Standard” option button to select “PAL/SECAM”

Option

Setting

Description

Type

Slope

Trigger on positive slope or

time of the oscilloscope.

Source

CH1

EXT/5

Select trigger source.

When

Select trigger condition.

Time

Turn the “Universal” knob to set

20ns-10s.

Page 1/2

Enter the second page of slope trigger menu.

or “NTSC”.

Slope Trigger

Trigger on positive slope or negative slope according to setup time of the oscilloscope.

Table 20 - Slope Trigger Function Menu 1

negative slope according to setup

CH2 *CH3 *CH4 EXT

*Available for 4CH models only.

< Set Time>

slope time. Time setup range is

Option

Setting

Description

Type

Slope

Trigger on positive slope or

Vertical

Select the trigger level that can

Mode

Auto

Use this mode to let the acquisition

Table 21 - Slope Trigger Function Menu 2

Figure 34 - Slope Trigger Menu

negative slope according to setup time of the oscilloscope.

be adjusted by “LEVEL” knob. You can adjust “LEVEL A”, “LEVEL B” or adjust them a t the same time.

free-run in the absence of a valid

ms/div or slower time base setting.

Normal

Use this mode when you want to see

the first trigger.

When you want the oscilloscope to

“SINGLE” button.

Set up

Enter the “T rigger setup menu”

Return to the first page of slope trigger menu.

trigger. This mode a llows an untriggered, scanning waveform at 100

only valid triggered waveforms. When you use this mode, the oscilloscope does not display a waveform until after

Single

Next Page Page 2/2

Figure 35 - Slope Trigger Menu 2

acquire a single waveform, press the

Operating Instructions: Follow next steps if you select “Slope trigger”:

1. Input a sig nal to one of the channel inputs.

2. Press the “AUTO” button.

3. Press the “TRIG MENU” button to enter “T r igge r me n u”.

4. Press the “Type” option button to select “Slope”.

5. Press the “Source” option button to select “CH1”, “CH2”,

“CH3”, or “CH4”. (CH3 and CH4 available for 4CH models only)

6. Press the “When” option button to sele c t “ ”, “

”, “ ”, “ ”, “ ” or “ ”.

7. Press the “Time” button and turn the “Universal” knob to

adjust slope time.

8. Press the “Next Page - Page 1/2” option butto n to e nter the

second page of the “Slope trigger menu”.

9. Press the “Vertical” option button to select a trigger level

that can be adjusted.

10. Turn the “LEVEL” knob.

Alternate Trigger

The trigger signal comes from two vertical channels when you use alternate trigger. In this mode, you can observe two unrelated signals at the same time. You can select different trigger types for two vertical signals. Different types include edge, pulse, video, and slope trigger. Trigger information for both channels will display on the bottom right of the screen.

Figure 36 - Alternate Trigger Menu

Option

Setting

Description

Type

Alternate

The trigger signal comes from two vertical

signals at the same time.

Select any two channels from CH1, CH2,

trigger.

Source

CH1, CH2,

*CH4

Selects the source channel.

Option

Setting

Description

Set Up

Enter the “T rigger setup menu”

Page 2/2

Go back to the first page of the TRIGGER

Table 22 - Set Trigger Mode to Edge Trigger Function Menu 1

channels when you use alternative trigger. In this mode, you can observe two irrelative

Channels CHX-CHY

*CH3, or *CH4 as the sources for alternating

*CH3,

Mode Edge

Next Page Page 1/2

Set trigger type of the vertical channel signal to Edge.

Go to the second page of the TRIGGER Menu.

*Available for 4CH models only.

Slope

Triggering on rising edge. Triggering on falling edge. Triggering on rising edge and falling edge.

menu.

Table 23 - Set Trigger Mode to Pulse Trigger Function Menu 1

Option

Setting

Description

Type

The trigger signal comes from two

signals at the same time.

Channels

CHX-CHY

Select any two channels from CH1,

for alternat ing trigger.

Set trigger type of the vertical

to Pulse trigger.

Enter the second page of Alternative trigger menu.

Option

Setting

Description

Set Width

20.0 ns~10.0 s

Selecting this option ca n turn the Set up

Enter the “Trigger Setup Menu”

Page 2/2

Press this button to return to the first page.

Alternate

vertical chan ne ls wh e n you us e alternative trigger. In this mode, you can observe two irrelative

CH2, *CH3, or *CH4 as the sources

Source

Mode Pulse

CH1, CH2, *CH3, *CH4

Selects the source channel.

channel signal (selected by Source)

Next Page Page 1/2

*Available for 4CH models only.

Table 24 - Set Trigger Mode to Pulse Trigger Function Menu 2

Select how to compare the trigger

When

pulse relative to the value selec te d in the Set Pulse Width option.

universal to set up the pulse width.

Table 25 - Set Trigger Mode to Video Trigger Function Menu 1

Option

Setting

Description

Normal triggers on the negative edge of

Sync

All lines

Select appropriate video sync.

Option

Setting

Description

Type

Alternate

The trigger signal comes from two

same time.

Channels

CHX-CHY

Select any two channels from CH1,

alternating trigger.

vertical chan ne ls wh e n you us e alternatee trigger. In this mode, yo u can observe two unrelated signals at the

CH2, *CH3, or *CH4 as the sources for

Source

Mode Video

Next Page Page 1/2

CH1, CH2, *CH3, *CH4

Selects the source channel.

Set trigger type of the vertical channel signal to Video trigger.

Enter the second page of Alternate trigger menu.

*Available for 4CH models only.

Table 26 - Set Trigger Mode to Video Trigger Function Menu 2

Polarity

(Normal)

(Inverted)

the sync puls e. Inverted tr iggers on the positive edge of the sync puls e.

Line Num Odd field Even Field

Standard

NTSC

Pal/Secam

Select the video standard for sync and Set up

Enter the “Trigger Setup Menu”

Enter the second page of Alternatetrigger menu.

Option

Setting

Description

Type

Alternative

The trigger signal comes from two vertical

irrelative signals at the same time.

Channels

CHX-CHY

Select any two channels from CH1, CH2,

alternating trigger.

CH1, CH2, *CH3, *CH4

Set trigger type of the vertical channel signal to slope trigger.

Enter the second page of the alternate trigger.

Option

Setting

Description

Time (Set time)

Turn the “Universal” knob to set the slope time. Time setup range is 20ns-10s.

line number count.

Next Page Page 2/2

Table 27 - Set Trigger Mode to Slope Trigger Function Menu 1

channels when you use alte rnative trigge r. In this mode, you can observe two

*CH3, or *CH4 as the sources for

Source

Mode Slope

Next Page Page 1/2

*Available for 4CH models only.

Table 28 - Set Trigger Mode to Slope Trigger Function Menu 2

When

Selects the source channel.

Select slope trigger condition.

Vertical

Select the trigger level that can be

Set up

Enter the “T rigger setup menu”.

Page 2/2

Return to the first page of “Alternate trigger menu”.

adjusted by “LEVEL” knob. You can adjust “LEV E L A”, “LEVEL B” or adjust them at the same time. Selections depend on slope trigger condition.

Operation Instructions:

To observe two irrelative channel signals, follow these steps ：

1. Input two irrelative signals to channel 1 and channel 2.

2. Press the AUTO button.

3. Press the TRIG MENU button to e nter “tr i gger me nu”.

4. Press the “Type” option button to select “Alternate”.

5. Press the “Channels” option button to select “CH1-CH2”

6. Press the “Source” option button to select “CH1”.

7. Press the CH1 button and turn the “Time/div” knob to

optimize waveform display.

8. Press “Mode” option button to select “Edge”, “Pulse”,

“Slope” or “Video”.

9. Set the trigger according to trigger edge.

10. Press the “Source” option button to select “CH2”.

11. Press the CH2 button and turn the “Time/div” knob to

optimize waveform display.

12. Repeat steps 8 and 9.

Coupling

Use “Coupling” to make sure the signal passes through the trigger circuit. It is useful for obtaining a steady waveform. If you use trigger coupling, you should press the “TRIGGER” button and then select “Edge”, “Pulse”, “Video”, or “Slope” trigger. Then select the “coupling” option in the “Set Up menu”.

Position

The horizontal position control establishes the time between the trigger position and the screen center. You can adjust the horizontal “POSITION” knob control to view waveform data before the trigger, after the trigger, or some of each. When you change the horizontal position of a waveform, you are changing the time between the trigger and the center of the display. (This appears to move the waveform to the right or left on the display.)

Slope and Level

The Slope and Level controls help to define the trigger. The Slope option (Edge trigger type only) determines whether the oscilloscope finds the trigger poi nt on the rising or the falling e dge of a signal.

The TRIGGER LEVEL knob controls where on the edge the trigger point occurs

Figure 37 - Rise and Fall Edge

Holdoff time

Trigger position

Trigger level

Note: ● Press the SING LE but to n whe n yo u wa nt the oscilloscope to

acquire a single waveform.

● Trigger coupling affects only the signal passed to the trigger system. It does not affect the bandwidth or coupling of the signal displ ayed on the screen.

● Normal Polarity Sync triggers always occur on negative-going

horizontal sync pulses. I f t he video waveform has posit ive-going horizontal sync pulses, use the I nverted Polarity selection.

Trigger Holdoff

You can use the Trigger Holdoff function to produce a stable display of complex waveforms. Holdoff is time between when the oscilloscope detects one trigger and when it is ready to detect another. The oscilloscope will not trigger during the holdoff time. F or a pulse trai n, you can adjus t the holdoff time so the oscilloscope triggers only on the first pulse in the train.

Figure 38 - Trigger Holdoff

If you want to change holdoff time, please follow the steps below:

1. Press the “TRIG MENU” but t on to sho w the “TRIG Menu”.

2. Press the “Type” option button to selec t trigger type.

3. Press the “Set Up” option button to enter the

“Trigger setup menu”.

Option

Setting

Description

Acquisition

Sampling

Use for sampling and accurately display

Peak Detect

Detect the noise and decrease the

Average

Use to reduce random or uncorrelated

Averages

128, 256)

Sinx/x

Sinx

Use sine interpolation.

Mode

Equ time

Set the Sampling mode to Equivalent

Set the Sampling mode to Real time.

Note ：● Use trigger holdoff to help stabilize the display of a periodic

waveform.

4. Press the “Holdoff” option button and turn the “Universal” knob to change the holdoff time until the wavefor m triggers steadily.

Signal Acquisition System

Shown below is the “ACQUIRE” button for entering the menu for “Acquiring Signals”.

Table 29- Acquiring Signals Function Menu

most of the wav eform.

possibility of aliasing.

noise in the signal display.

(4, 16, 32, 64,

Real time

Select number of averages.

Use linear interpolation.

time.

Sa Rate

Displays system sampling rate.

When you acquire a signal, the oscilloscope converts it into digital form and displays a waveform. The acquisition mode defines how the signal is digitized and the time base setting affects the time span and level of detail in the acquisition.

• Sampling: In this acquisition mode, the oscillosco pe samples the

signal in evenly spaced intervals to c onstruct the waveform. This mode accurately represents signals most of the time.

Advantage: You can use this mode to reduce random noise. Disadvantage: This mode does not acquire rapid variations in the

signal that may occur between samples. T his can result in aliasing, which may cause narrow pulses to be missed. In these cases, you should use the Peak Detect mode to acquire data.

• Peak Detect: Peak Detect mode capture the maximum and

minimum values of a signal Finds highest and lowest record points over many acquisitions. Advantage: In this way, the oscilloscope can acquire and display narrow pulses, which may have otherwise been missed in Sample mode. Disadvantage: Noise will appear to be higher in this mode.

Figure 39 - Acquire Menu

Figure 40 - Peak Detect

• Average: The oscilloscope acquires several waveforms, averages

them, and displays the resulting waveform. Advantage: You can use this mode to reduce random noise.

Figure 41 - Acquisition Averaging Screen

• Equivalent Time Sampling: The equivalent time sampling mode

can achieve up to 50 GSa/s. This mode is useful for observing repetitive waveforms.

• Real Time Sampling: The oscilloscope’s maximum real-time

sampling rate is 2 GSa/s.

• “RUN/STOP” Button: Press the RUN/ST OP button when you

Sampled points

Apparent low-frequency waveform due to aliasing

Actual high-frequency waveform

want the oscilloscope to acquire waveforms continuously. Press the button again to stop the acquisition.

• “SINGLE” Button: Press the SINGLE button to acquire a single

waveform. Each time you push the SINGLE button, the oscilloscope begins to acquire another waveform. After the oscilloscope detects a trigger it c ompletes the acquisition and stops. When you push the RUN/STOP or SINGLE buttons to start an acquisition, the oscilloscope goes through the following steps:

1. Acquire enough data to fill the portion of the waveform

record to the left of the trigger point. This is also called the pre-trigger.

2. Continue to acquire data while waiting for the trigger

condition to occur.

3. Detect the trigger condition.

4. Continue to acquire data until the waveform record is full.

5. Display the newly acquired waveform.

• Time Base: The oscilloscope digitizes waveforms by acquiring

the value of an input signal at discrete points. The time base allows you to control how often the values are digitized. To adjust the time base to a horizontal scale that suits your purpose, use the Time/div knob.

• Time Domain Aliasing: Aliasing occurs when the oscilloscope

does not sample the signal fast enough to construct an accurate waveform record. When this happens, the oscilloscope displays a wavefor m with a frequency lower than the actual input waveform, or triggers and displays an unstable wa veform.

Figure 42 - Time Domain Aliasing

Operating Instructions:

Set up Sampling For mat

You can press the “Acquisition” optio n button or turn t he “Universal” knob to select “Sampling” mode, “Peak Detect” mode or “Average” mode.

Set up Averages

When you select “Average” format, you can press the “Averages” option button to select “4”, “16”, “32”, “64”, “128” or “256”.

Set up function interpola tion

You can select Sinx interpolation or linear interpolation.

Figure 43 - Sine Interpolation

Figure 44 - Linear Interpolation

Option

Setting

Description

Type

Vectors

Vectors: Fills the space

points.

Persist

Off

Infinite

Sets the length of time

Intensity <Intensity>

Set waveforms’ intensity.

Brightness

Set grid brightness.

Page 1/3

Press this button to

Set up Sampling mode

Press the “Mode” option button to select “Real Time” or “Equ Time”.

Set up Sampling rate

Adjust the sampling rate by pressing the “Sa Rate” option button and turning the Time/div front panel knob. The sampling r ate is shown at the corresponding timebase scale.

Display System

The display function can be setup by pre s sing the “DISPLAY” button.

Table 30- Display System Function Menu 1

Dots

1 sec 2 sec 5 sec

between adjacent sample points in the display. Dots: There is no link between adjacent sample

each displayed sample point remains displayed.

enter second page.

Option

Setting

Description

Format

YT format displays the vertical

and channel 2.

Screen

Normal

Set to normal mode.

mode.

Grid

Display grids and axes on the Menu

2sec

10sec

Set menu dis play time on screen.

Figure 45 - Display Menu Screen

Table 31 - Display System Function Menu 2

Display

Inverted

5sec

voltage in relation to time (horizontal scale). XY format displays a dot each time a sample is acquired on channel 1

Set to invert color display

screen. Turn off the grids. Turn off the grids and axes.

20sec Infinite

Page 2/3

Press this button to enter the second page of “Display menu”.

Option

Setting

Description

Skin

Classical

Succinct

Set up screen style.

Page 3/3

Press this button to return to the first page.

Figure 46 - Display Menu 2

Table 32 - Display System Function Menu 3

Modern Tradition

Operation Introduction:

Setup waveform display type

1. Press the “DISPLAY” button to enter the

“Display” me nu.

2. Press the “Type” option button to sele c t

“Vectors” or “Dots”.

Set up Persist

Press the “Persist” option button to select “Off”, “1 Sec”, “2 Sec”, “5 Sec” or “Infinite”. You can use this option to observe some special waveforms.

Setup Intensity

Press the “Intensity” op t ion button and turn the “Universal” knob to adjust waveforms ’ intensity.

Setup Brightness

Press the “Brightness” option button a nd turn the “Universal” knob to adjust grid brightness.

Setup Display Format

1. Press the “Next Page” option button to enter

second display menu.

2. Press the “Format” option button to select “YT” or

“XY”

Setup Screen

Press the “Screen” option button to select “Normal” or “Inverted” to set the screen display color.

Figure 47 - Persist Screen

Setup Grid

Note: The oscilloscope can capture a waveform in normal YT mode

Press the “Grid” option button to select “ ”, “

”or“ ”to set the screen whether to

display grid or not.

Setup Menu Display

Press the “Menu Display” option butto n to sele c t “2 sec”, “5 sec”, “10 sec”, “20 sec”, or “Infinite” to set menu display time on screen.

Set Skin

Press the “skin” option butt on or turn the “Universal” knob to select “Classical”, “Mo dern”, “Traditional”, or “Succinct”.

X-Y Format

Use the XY format to analyze phase differences, such as those represented by Lissajous patterns. The format plots the voltage on chann el 1 against the voltage on channel 2, where channel 1 is the horizontal axis and chan nel 2 is the vertical axis. The oscilloscope uses the untriggered Sample acquisition mode and displays data as dots.

at any sampling rate. You can view the same waveform in XY mode. To do so, stop the acquisition and change the display format to XY.

Operation steps:

● Channel 1 (or channel 3) “Volts/div” and vertical

“POSITION” set up the horizontal scale a nd position.

● Channel 2 (or channel 4) “Volts/div” and vertical

“POSITION” set up the horizontal scale a nd position.

● Turn the “Time/div” knob to a djust the sampling rate

● The following functions are forbidden at XY display

form:

● Benchmark waveform and wave mathematics

● Cursor

● Auto (resets display format to YT)

Note: When the display type is set to Vector, the oscilloscope

● Trigger Control

● Horizontal Position Knob

● Vector Display Type

● Scan Display

connects the s ample point s by using digital interpolation. Interpolation mode contains linear inter polation and sin(x)/x interpolation. Sin(x)/x interpolation is suitable for reconstructing curved or irregular wave shapes, especially when the sample rate is 3 to 5 times the system bandwidth or at faster time base settings.

Measure System

The oscilloscope displays the volta ge in relation to time and tests the waveform displayed. Different measurement techniques such as scale, cursor, and auto measure modes are used.

Scale Measurement

This method allows you to make a quick visual estimate. For example, you might look at waveform amplitude a nd determine that it is a little more than 100 mV. You can take simple measurements by counting the major and minor graticule divisio ns involved and multiplying by the scale fa ctor. For example, if you counted five major vertical graticule divisions between minimum and maximum values of a waveform and knew you had a scale factor o f 100 mV/div, then you could easily calculate your peak-to-peak voltage as follows:

5 divisions x 100 mV/div = 500 mV

Cursor Measurement

Option

Setting

Description

Cursor Mode

Manual

Manually ad just cursors for measurement.

Type

Voltage

Use cursor to measure voltage

parameters.

Source

CH1

*REFD

Select input signal channel.

Cur A

Select this option, turn the

cursor A.

Cur B

Select this option, turn the

cursor B.

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

Manual Mode

Table 33 - Manual Cursor Function Menu

*Available for 4CH models only.

In this mode, the screen displays two horizontal parallel cursors or vertic a l parallel cursors to measure voltage or time. You can move the cursor by turning the “Universal” knob. Before using cursors, you should ma ke sure that you have set the signal source as the channel for measuring.

Time

CH2 *CH3 *CH4 MATH/FFT REFA REFB *REFC

parameters. Use cursor to measure time

“Universal” knob to adjust

• Voltage Cursor: Voltage cursors appear as horizontal lines on

the display and measure the vertical parameters.

• Time Cursor: Time cursors appear as vertical lines on the

display and measure the horizontal parameters.

• Cursor Moving: Use the “Universal” knob to move cursor 1 and

cursor 2. They will be moved when the corresponding cursor options are selected, and the cursor value will display on the bottom left and top left of the screen when you move the cursor.

To do manual cursor measurements, follow these steps:

1. Press CURSOR button to enter the cursor function menu.

2. Press the “Cursor Mode” option button to select “Manual”.

3. Press the “Type” option button to sele c t “Voltage” or “Time”

4. Press the “Source” option button to select “CH1”, “CH2”,

“CH3”, “CH4”, “MATH”, “FFT”, “REFA”, “REFB”, “REFC”, “REFD”, according to input signal channel. (CH3, CH4, REFC, and REFD available for 4CH models only)

5. Select “Cur A” and turn the “Universal” knob to adjust Cursor

6. Select “Cur B” and turn the “Universal” knob to adj us t C ursor

7. The measurement values are displayed on the top left corner.

If the measurement type is set to “Voltage”, the values are as follows: The value of Cur A: Cur A The value of Cur B: Cur B The voltage difference between Cursor A and Cursor B: ∆V If the measurement type is set to “Time”, the values are as follows: The value of Cur A: Cur A The value of Cur B: Cur B The time difference between Cursor A and Cursor B: ∆T The reciprocal of time difference between Cursor A and Cursor B: 1/∆T

Track Mode

Option

Setting

Description

Cursor Mode

Track

In this mode, set track cursor measure.

Cursor A

CH1

NONE

Set the input signal channel that the

Cursor B

CH1

NONE

Set the input signal channel that the

Cur A

Select this option, turn the “Universal”

Cursor A.

Cur B

Select this option, turn the “Universal”

Cursor B.

Figure 48 - Cursor Menu

Table 34- Track Mode Function Menu

CH2 *CH3 *CH4

*Available for 4CH models only.

n this mode, the screen displays two c ross cursors. The cross cursor sets

the position on the waveform automatically. You co uld adjust the cursor’s

Cursor A will measure.

Cursor B will measure.

knob to adjust horizontal coordinate of

horizontal position on the waveform by turning the “Universal” knob. The oscilloscope displays the values on the top left of the screen.

To do track cursor measurement, follow these steps:

1. Press CURSOR button to enter the cursor measure function

menu.

2. Press the “Cursor Mode” option button to select “Track”.

3. Press the “Cursor A” option button to select the inpu t signal

channel.

4. Press the “Cursor B” o ption button to select the input signal

channel.

5. Select “Cur A”, turn the “Universal” knob to move Cursor A

horizontally.

6. Select “Cur B”, turn the “Universal” knob to move Cursor B

horizontally.

7. The measure ment values are displa yed on the left of the top

corner: A T: The horizontal position of Cursor A (Time cursor centered around the midpoint of screen)

A V: The vertical position of Cursor A (Voltage cursor centered a round channel ground level)

B T: The horizontal position of Cursor B (Time cursor centered around the midpoint of the screen)

B V: The vertical p osition of Cursor B (Voltage cursor centered around the channel ground level)

∆T: Horizontal space between Cursor A and Cursor B (Time

value between two cursors).

1/∆T: The reciprocal of horizontal space between cursor A and

cursor B. ∆V: Vertical space between Cursor A and Cursor B (Voltage

value between two cursors).

Figure 49 - Cursor Menu

Option

Setting

Description

Cursor Mode

Auto

Set to auto cursor measure mode.

Auto Mode

Table 35 - Auto Mode Function Menu

This mode will take effect with auto matic measurements. The instruments will display cursors while measuri ng par ameters automatically.

To do auto cursor measurements, follow these steps:

1. Press the CURSOR button to enter “Cursor measure menu”.

2. Press the “Cursor Mode” option button to select “Auto”. Press the “MEASURE” button to e nter “Auto cursor measure mode menu” to select the parameter that you want to me as ur e.

Figure 50 - Auto Mode

Option

Description

Voltage

Press this button to enter the Volta ge measurement menu.

Time

Press this button to enter the Time measurement menu.

Delay

Press this button to enter the Delay measurement menu.

All Mea

Press this button to enter the All Mea surement menu.

Return

Press this option button to return to the home page of the auto measurement menu.

Auto Measurement

When you take automatic measurements, the oscilloscope does all the calculation for you. The measurements use all the recorded points in the memory, which are more accurate than measurements made using the graticule lines or cursor measurements because these measurements are confined to be made by only using points on the display and not all the data points recorded by the oscilloscope.

Press the ‘MEASURE’ button for Automatic Test. There are three auto measurement types: Voltage Measure, Time Measure, and Delay Measure. There are a total of 32 measurement parameters.

Table 36 - Auto Measurement Function Menu 1

Figure 51 - Auto Measure Menu 1

Option

Setting

Description

Source

CH1, CH2, *CH3, *CH4

Select input signal source for Voltage measurement.

Type

Vpp, Vmax, Vmin, Vamp,

RPREShoot,

Press the “Type” button

Return

Return to the first page of auto measure men t me n u.

Table 37 - Auto Measurement Function 2 - Voltage Measurement Menu

Vtop, Vbase, Vavg, Mean, Vrms, Cycle Vrms, FOVShoot, FPREShoot, ROVShoot,

or turn the “Universal” knob to select Voltage measurement parameter.

Display the corresponding icon and measurementvalue of your selected Voltage measurement parameter.

Option

Setting

Description

Source

CH1, CH2, *CH3,

Select input signal

measurement.

Type

Freq, Period, +Width, -

Press the “Type”

parameter.

Display the

parameter.

Return

Return to the first

measureme nt me nu.

Option

Setting

Description

Source

CHX - CHY

Select any two input signal

measurement.

Type

Phase, FRR, FRF, FFR,

Press the “Type” button or

parameter.

Display the corresponding

Table 38 - Auto Measurement Function 3 - Time Measurement Menu

*CH4

Width, Rise Time, Fall Time, BWidth, +Duty,

-Duty

source for Time

button or turn the “Universal” knob to select Time measurement

corresponding icon and measurement value of yo ur selected time measurement

page of auto

Table 39 - Auto Measurement Function 4 - Delay Measurement Menu

source for Delay

FFF, LRR, LRF, LFR, LFF

turn the “Universal” knob to select Delay measurement

icon and measure value of your selected Delay measurement parameter.

*Available for 4CH models only.

Option

Setting

Description

Source

CH1

*CH4

Select input signal channel.

Voltage

Turn on the al l measurement function to

measure voltage parameters.

Time

Turn on the al l measurement function to

measure Time parameters.

Return

Return to the “All Measurements main menu”.

Return

Return to the first page of auto measureme nt me nu.

Measure Type

Description

Measures the absolute difference between the

waveform.

Vmax

The most positive peak voltage measured over the entire waveform.

Vmin

The most negative peak voltage measured over the ent ire waveform.

Voltage between Vhig and Vlow of a

Table 40 - All Measurement Function Menu

CH2 *CH3

Off

measure voltage parameters. Turn of the al l measurement function to

Off

measure Time parameters. Turn of the al l measurement function to

*Available for 4CH models only.

Table 41 – Types of Measurements

Vpp

maximum and minimum peaks of the entire

Vamp

waveform.

Vtop

Measures the highest voltage over the entire waveform.

Measures the lowest voltage over the entire Vavg

The arithmetic mean over the first cycle in the waveform.

Mean

The arithmetic mean over the entire Crms

The true Root Mean Square voltage over the

Defined as (Vmax-Vhig)/Vamp after the

FOVShoot

Defined as (Vmin-Vlow)/Vamp after the

wavefor m fa lling.

RPREshoot

Defined as (Vmin-Vlow)/Vamp before

FPREshoot

Defined as (Vmax-Vhig)/Vamp before

the wavefor m fall in g.

FREQ

Measures the frequency of the waveform.

PRD

Measures the period of the waveform.

Rise Time Measures the time between 10%

waveform.

Fall Time Measures the time between 90%

waveform.

The durati on of a burst.

+ Width Measures the time between the first

Vbase

Vrms

ROVShoot

waveform.

first cycle in the waveform.

entire waveform.

wavefor m ris ing.

the waveform rising.

Rise Time

and 90% of the first rising edge of the

Fall Time

and 10% of the first falling edge of the

BWid

Measured over the entire waveform.

+ Wid

rising edge and the next falling edge at t he waveform 50% level.

- Wid

-Width Measures the time between the first

Measures the first cycle waveform.

The amount one wavefor m leads or lags

The time between the first rising edge of The time between the first rising edge of

FFR

The time between the first falling edge of source 1 and the first rising edge of source 2.

FFF

The time between the first falling edge of

LRR

The time between the first rising edge of

LRF

The time between the first rising edge of source 1 and the last falling edge of source 2.

LFR

The time between the first falling edge of source 1 and the last rising edge of source 2.

LFF

The time between the first falling edge of

falling edge and the next rising edge at the waveform 50% level.

+ Duty

－Duty

Phase

FRR

FRF

Positive Duty Cycle is the ratio between positive pulse width and period.

Negative Duty Cycle is the ratio between negative pulse width and period.

another in time. Expressed in degrees, where 360 degrees comprise one waveform cycle.

source 1 and the first rising edge of source 2.

source 1 and the first falling edge of sour ce 2.

source 1 and the last rising edge of source 2.

source 1 and the last falling edge of source 2.

If you want to measure voltage parameters, please follow the steps below:

1. Press the “MEASURE” button to enter the “Auto measurement”

menu.

2. Press the first option butto n to enter the “second measurement

menu”.

3. Select measure type. If you press the “Voltage” option button,

“Voltage measurement” menu will display on the screen.

4. Press the “Source” option button to select “CH1”, “CH2”, “CH3”,

or “CH4” according to inp ut signal channel. (CH3 and CH4 available for 4CH models only)

5. Press the “Type” option button to select the parameter type that

you want to measure. The c orresponding icon and value will display below the measure parameter.

6. Press the “Return” option button to r eturn to the home page of the

“Auto Measurement” menu. The selected parameter and the corresponding value will display on the top position of the home page. You can display the other parameters and its value on the corresponding position in the same way. The screen can display up to five parameters at one time.

If you want to measure time parameters using all measure function, please follo w these steps:

1. Press the “MEASURE” button to enter the “Auto Measure

menu”.

2. Press the top option button to enter the second page of “Auto

Measure menu”.

3. Press “All Mea” option button to enter the “All Measure menu”.

4. Press “Source” option button to select input signal c hannel.

5. Press the “Time” option butto n to sele c t “On”. Now all of the

time parameters’ values will displa y on the scre en at the same time.

Figure 52 - Measuring Time Parameters

Storage System

Shown below, the “SAVE/ R ECALL” button enters the “Storage System Function Menu”.

The scope can save and recall up to 20 instrument settings and 20 waveforms to its internal memory. There is a USB host port on the front and rear panel of the oscilloscope where you can save setup data, waveform data, waveform interface image, and CSV file to a USB flash drive. Setup data and waveform data that are saved to a USB flash drive can be recalled on the oscilloscope. For picture data and CSV file, a computer must be used to view them.

• Using SAVE/RECALL Screen

The SAVE/RECALL screen is divided into functions based on Directories or Files. Directorie s show option buttons for New Folder, Del Folder, and Load. While File shows option buttons for New Folder, Delete File, and Load.

Figure 53 - Save All Menu Screen 1

Note: The Load button option is disabled (grayed-out) when .BMP or

Figure 54 - Save All Menu Screen 2

Recalling Files

The Load button is used to recall your setup files. Once you have navigated to the desired file and it is highlighted in the main screen area, press the Load option button and the setup is recalled from the USB flash drive.

.CSV file types are selected.

Both Direc tory and Files have Rename and R eturn option buttons on Page2/2. Use these buttons to give an existing folder or file a new name or to exit the SAVE/RECALL screen, respectively.

Figure 55 - Rename Screen

Creating Folders and Files

Create new folders and files by pressing the New Folder or New File option button. The following screen is shown:

Figure 56 - Input Characters Screen

• The New File menu options are the same as the New Folder

Option

Setting

Description

Type

Setups

Menu for the Storage/Recall setting

Save to

Device

Save setup to the oscilloscope’s internal memory.

Setup

No.1 to No.20

Press the “Setup” option button or

storage location.

Save

Save to the selected storage location.

Recall

Recall from the storage location indicated by “Setup”.

menu. The InputChar option button adds the selected character to the cursor position in Name field.

• Move the cursor position in the name fi eld using the “→” a ” option buttons.

“←

• Turn the “Universal” knob to move through character selections.

When the desired character is highlighted, press the “Universal” knob or press the “InputChar” option button to a dd it to the specific position in the Name field.

• Additional selections for BackSpace, DeleteCharacter, and

CleanName are available for convenience and are also accessible using the “Universal” knob in the same ma nner.

• Press the “Confirm” option b utton (when you have the Name field

completed as desired) to save the file onto the memory device. After the “Confirm” option button is pressed, a “Data Store Success!” message is briefly shown and the new folder or file w b

e listed under your USB flash drive.

ill

Save/Recall Setup

ve Setups to Device: The complete setup is stored in

• Sa

nonvolatile memory. When you recall the setup, the oscilloscope will be in the mode from which the setup was saved. The oscilloscope saves the current setup if you wait three seconds after the last change before you power off the oscilloscope. Th o

scilloscope recalls this setup the next time you apply power.

Table 42 - Save Setup to Device Function Menu

in the oscilloscope

turn the “universal” knob to select

Figure 57 - Save/Rec Menu

ave setups to the oscilloscope’s internal memory, follow the steps

To s below:

For example: Save setup that set waveform display type to “Dots” to internal memory.

1. P

ress the “SAVE/RECALL” button to enter th

“

SAVE/RECALL” menu.

2. Press the “Type” option button to select “setups”.

3. Press the “Save to” option button to select “Device”.

4. Press the “Setup” option button to select “No.1”.

5. Press the “DISPLAY” button to enter the “Display” menu.

6. Press the “Type” option button to select “Dots”.

7. Press the “SAVE/RECALL” button to enter the “SAVE/RECALL” menu.

8. Press the “Save” option button.

To Recall setup, follow steps below:

1. Press the “SAVE/RECALL” button to enter the “

SAVE/RECALL” display menu.

2. Press the “Type” option button to select “Setups”.

3. Press the “Save to” option button to select “Device”.

4. Press the “Setup” optio n button or tur n the “Universal” kno

o select “No.1”.

5. Press the “Recall” option button.

• Save Setup to USB Flash Drive

Option

Setting

Description

Type

Setups

Menu for the Storage/Recall settings.

Save to

File

Save setup data to USB flash drive.

Save

Go to the Save/Recall interface

Table 43 - Save Setup to USB Flash Drive Function Menu

Figure 58 - Save Setup Screen

Save Setup to USB Flash drive:

For example: Save setup that set waveform display type to “Dots” to USB flash drive.

1. Press the “SAVE/RECALL” button to select “Setups”.

2. Insert USB flash drive to USB host port of the oscilloscope and

wait until the oscilloscope has initialized USB flash drive (ab out five second).

3. Press the “Save to” option button to select “file”.

4. Press the “Save” option button to go into the Save/Recall

interface.

5. Press the “New folder” button to create a new folder

Option

Setting

Description

Type

Factory

To view the Factory setup .

UpdateCfg

Load

Recall the Factory setup.

6. Press the “Del folder” option button to delete a folder

7. Press the “Modify” option button to modify a folder.

8. Press the “New file” option button to create a new file

9. Press the “Del file” option button to delete a file

10. Press “the ne xt page” option button and press the “Rename”

option button to modify the name of the file or the folder.

11. Turn the “Universal” knob to select the folder and press the

“Confirm” option button and you will save the set to the USB drive.

To Recall setup data from USB flash drive, follow the steps below:

1. Press the “SAVE/RECALL” button.

2. Press the “Type” button to select “Setups”.

3. Insert USB flash drive to USB host port of the oscilloscope and

wait until the oscilloscope has initialized USB flash drive (about five seconds).

4. Press the “Save to” option button to select “File”.

5. Press the “Save” option button, then you will go into the

Save/Recall interface.

6. Choose the file you want then press the “Load” option button

(within 5 seconds there will be a message “Read data success”). Now the setup data have been recalled from the USB flash dr ive.

• Recall Factory

You can use this option to recall factory settings.

Table 44 - Factory Function Menu

Figure 59 - Set Factory Default Screen

Option

Setup

Description

Type

Waveforms

Selects Waveform for saving/recalling.

Save to

Device

Save waveforms to the oscilloscope’s

Waveform

No.1 to No.20

Press the “Waveform” option button or

storage location.

Save

Save waveform to the selected storage location.

Recall

Recall the “Waveform” from the

“Waveform” option.

Save/Recall Waveform

Save Waveforms to Device

Table 45 - Save Waveform to Device Function Menu

internal memory.

turn the “Universal” knob to select

selected storage location in

100

BK Precision BK Precision 2557 Manual

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User Manual