BK Precision 2540, 2534, 2542 User Manual

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User Manual

Digital Storage Oscilloscopes

Models 2534, 2540 & 2542

Version 1.02

GeneralSafetySummary

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures.

To Avoid Fire or Personal Injury Use Proper Power Cord. Use only the power cord specified for this

product and certified for the country of use. Connect and Disconnect Properly. Do not connect or disconnect probes

or test leads while they are connected to a voltage source. Ground the Product. This product is grounded through the grounding

conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

Connect the Probe Properly. The probe ground lead is at ground potential. Do not connect the ground lead to an elevated voltage.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and marking on the product. Cons ul t t he pr o du ct manual for further ratings information before making connections to the product.

Do Not Operate Without Covers. Do not operate this product with covers or panels removed.

Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.

Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

 GeneralSafetySummary

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

Symbols and Terms on the Product.

Protective Ground (Earth) Terminal.

CAUTION. Refer to user manual. Caution indicates a hazard to property including this product

GeneralSafetySummary

Contents

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5

Contents

Contents ..........................................................................................5

1. Getting Started...............................................................7

Inspect package content......................................................7

Front Panel ............................................................................8

Rear panel ...........................................................................14

Interpreting the display.......................................................15

2. Basic Operation ...........................................................17

Probe Compensation .........................................................17

Using Autoset ......................................................................18

Vertical Controls..................................................................20

CH1, CH2 Menu..........................................................22

REF Function...............................................................39

Horizontal Controls.............................................................42

Trigger Controls ..................................................................55

ACQUIRE Menu..................................................................67

UTILITY Menu .....................................................................78

MEASURE Menu ................................................................91

SAVE/LOAD Menu ...........................................................106

CURSOR Menu.................................................................117

DISPLAY Menu .................................................................123

RUN Controls ....................................................................126

3. Application Examples................................................129

Make Simple Measurements ..........................................129

Contents

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6

Capture a Single-Shot Signal......................................... 131

Reduce the Random Noise on a Signal ....................... 133

Trigger on a Video Signal ............................................... 135

PASS/FAIL Measurement............................................... 138

Waveform Recorder ........................................................ 140

Cursor Measurements..................................................... 144

4. System Message and General Problems ............. 151

System Message.............................................................. 151

General Problems ............................................................ 154

5. Specifications and Characteristics......................... 157

Characteristics.................................................................. 157

Appendix A: Service and Warranty Information .................. 165

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Getting Started

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7

1. Getting Started

Inspect package content

Inspect the shipping container for damage. If the shipping

container and/or packaging material are damaged, it should

be kept until the content of the shipment has been checked

for completeness and the oscilloscope has been checked

mechanically and electrically.

Verify that you received the following items:

z Oscilloscope

z Two high performance 150MHz oscilloscope probes

z Power cord

z User Manual

z Test report

z Comsoft Installation disk

z USB data cable

If the content is incomplete or if there is any mechanical

damage or defect, please contact your authorized distributor.

Getting Started

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8

Front Panel

This section provides an introduction to the front panel of the

model 2534 and 2540 series oscilloscopes. Generally, you

set up the front panel controls first and then make your

measurements.

The keys or knobs on the front panel bring up softkey menus

on the display that provide further access to the

oscilloscope’s features. The entry knob

is usually used to

select or change values. Five softkeys are located along the

right side of the display screen.

The following figure shows the front panel of the 2534/2540

series oscilloscopes.

Front panel

Getting Started

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9

1. PRINT key

Press this key to print the current display to a USB mass

storage device.

2. AUTO key

When you press the AUTO key, the oscilloscope will

quickly determine which channels are active and

automatically scale the display to show the signals on

these channels.

3. Entry knob

The Entry knob is used to select items from menus and

input values. Its function changes when a different menu

is displayed. The curved arrow symbol

to the left of

the Entry knob lights up when the Entry knob is active

and can be used to select a value.

4. Utility and Save/Load Menu

UTILITY

Access the system utility functions, such as Language

Setup, I/O Setup, and Print Setup etc.

SAVE/LOAD

You can save your current setup and waveform data to

the oscilloscope’s internal memory or to a USB mass

storage device and retrieve the setup or waveform later.

5. Measure and Waveform Menu

MEASURE

Getting Started

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Perform automated measurements of waveform

parameters.

ACQUIRE

The ACQUIRE menu lets you set the oscilloscope to

acquire waveforms in Normal, Peak Detect, or Average

mode and lets you select Real Time or Equivalent

sampling.

CURSOR

Press the CURSOR key to activate the cursors for

making custom voltage or time measurements on scope

signals.

DISPLAY

You can change the appearance of waveforms and the

display screen, select the color schemes, and adjust the

contrast, etc.

6. RUN control keys

The RUN/STOP key will be green when the oscilloscope

is waiting for a trigger event. When the trigger mode is

set to Normal, the display will not update until a trigger

event occurs. If the trigger mode is set to Auto, the

oscilloscope looks for a trigger; if no trigger is found, it

will be triggered automatically and the input signals will

be displayed.

Getting Started



Press the RUN/STOP key again to stop acquiring data.

The RUN/STOP key will be red. Now you may examine

the acquired waveform by panning and zooming.

Press the SINGLE key to acquire a single waveform

trace. The key will remain orange until the oscilloscope is

triggered. After the trigger event, the waveform is

displayed and triggering is disabled until re-armed by

pressing the SINGLE key again.

7. Vertical controls

You can use the vertical position control knob to move

the waveforms up or down on the display. There is one

vertical position control knob for each channel.

You can press the channel key CH1 or CH2 to switch the

channel on or off or access the associated channel menu

via the softkeys. There is one channel on/off key for each

channel.

You can press the MATH key to access the FFT (Fast

Fourier Transform), multiply, subtract, and add functions.

You can press the REF key to save or load a reference

waveform from the internal memory or an external USB

mass storage device.

You can use the vertical scale control knob to change the

vertical scale of a waveform. The waveform display will

Getting Started

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contract or expand relative to the ground reference level.

There is one vertical scale control knob for each channel.

8. Horizontal controls

When the oscilloscope is in run mode, the horizontal

position control knob lets you set the acquisition window

relative to the trigger point. When acquisition is stopped,

you can turn this knob to pan through the stored

waveform data horizontally. This lets you see the

captured waveform before or after the trigger.

Press the horizontal MENU key to access the menu

where you can activate a delayed sweep or select X-Y or

Roll modes.

Turn the horizontal sweep rate control knob to adjust the

sweep speed. This changes the time base on the

display. When adjusted after the waveform has been

acquired and the oscilloscope is stopped, this has the

effect of stretching or compressing the waveform

horizontally.

9. Trigger controls

These controls are used to control how the oscilloscope

triggers to capture waveforms.

10. Probe compensation terminals

Getting Started

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Use these two probe compensation terminals to match

each probe’s characteristics to the oscilloscope channel

to which it is connected.

11. External trigger input

This is the external trigger input BNC connector.

12. Channel input BNC

This is the channel’s input BNC connector. Connect the

oscilloscope probe or BNC cable to the BNC Connector.

13. MENU On/Off key

Press this key to toggle the menu display on and off.

14. Softkeys

Five menu softkeys are used to select the control and

parameter setting functions. Each softkey has a label

along the right side of the screen.

15. Power switch

Press once to turn power on, press again to turn power

off.

16. LCD display

The 320*240 matrix (5.7 inch) LCD displays captured

waveforms, setup information, measurement results, and

softkeys for setting up parameters.

Getting Started

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Rear panel



Rear panel

1. Line input receptacle

AC power cord receptacle. Attach to an AC power line

with a safety ground.

2. USB connector

The USB device connector can be connected to a

computer.

3. Extension port

Connect optional extension communication modules.

Contact B&K Precision for availability.

21

3

Getting Started

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Interpreting the display

The oscilloscope display contains channel acquisition

information, setup information, measurement results, and soft

keys for setting up measurement parameters.

Interpreting the display

1. Readout shows the real time clock.

2. The USB icon displays when a USB device is connected.

3. Acquisition status readout shows RUN, STOP, WAIT, or

ROLL.

4. The square brackets show the location of the current

display window within the recorded waveform. The

Getting Started

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record line color corresponds to the selected waveform

color.

5. The trigger position icon shows the trigger location within

the record.

6. The trigger position icon shows the trigger location in the

current displayed waveforms.

7. This readout shows the frequency of the trigger signal.

8. The trigger status readout shows the trigger status.

9. These are soft keys which allow you to set up additional

parameters.

10. The display area contains the displayed waveforms,

channel identifiers, and trigger and ground level

indicators. The channel information is shown in the same

color as the channel’s waveform.

11. This readout shows the delay setting or the trigger

location within the record, trigger source, trigger type,

and trigger level.

12. The horizontal readout shows the Main or Delayed time

base setting.

13. The channel readouts show the scale factor, coupling,

bandwidth limit, digital filter, and invert status.

14. Waveform baseline icons show the zero-volt levels of the

waveforms. The icon colors correspond to the waveform

colors.

Basic Operation



2. Basic Operation

Probe Compensation

Perform this adjustment to match your probe to the input

channel. This should be done whenever you attach a passive

probe for the first time to any input channel. A poorly

compensated probe can introduce measurement errors.

1. Connect the oscilloscope probe to channel 1. Connect

the probe tip to the 3Vp-p@1kHz terminal and connect

the probe’s ground lead to the chassis ground terminal,

then press the AUTO key.

2. Use a nonmetallic tool to adjust the trimmer capacitor on

the probe for the flattest pulse possible. The trimmer

capacitor is located on the probe BNC connector.

Correctly compensated

Over compensated

Under compensated

Basic Operation

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3. Connect probes to all other oscilloscope channels.

Repeat the procedure for each channel. This matches

each probe to each channel.

Using Autoset

The 2534 & 2540 series digital storage oscilloscopes provide

the Autoset function which sets the vertical, horizontal, and

trigger controls automatically.

Autoset function finds, turns on, and scales any channel with

a repetitive waveform that has a frequency of at least 50 Hz,

a duty cycle greater than 0.5% and an amplitude of at least

10 mV peak-to-peak. Any channels that do not meet these

requirements are turned off.

When you are using more than one channel, the Autoset

function sets the vertical controls for each channel and uses

the lowest-numbered active channel to set the horizontal and

trigger controls.

To configure the oscilloscope quickly and automatically,

press the AUTO key to display the connected signals that are

active.

To configure the oscilloscope to display multiple cycles,

press the Multi-Cycle softkey in the AUTO menu.

To configure the oscilloscope to display a single cycle, press

the Single Cycle softkey in the AUTO menu.

Basic Operation

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To undo the effects of Autoset, press the Undo Autoset

softkey in the AUTO menu before pressing any other key.

This is useful when you have unintentionally pressed the

AUTO key or do not like the settings Autoset has selected

and want to return to your previous settings.

to set oscilloscope channel 1

Basic Operation

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Vertical Controls



Vertical controls

Vertical Position Control (CH1, CH2)

Turn the small vertical position knob above the channel key

to move the channel’s waveform and its ground level icon (

)

up or down on the display. The voltage value momentarily

displayed in the bottom left portion of the display represents

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the voltage difference between the vertical center of the

display and the ground level(

Press the small vertical position knob above the channel key

to bring the channel’s waveform and its ground level icon (

)

directly back to the vertical center of the display.

Channel key CH1, CH2, MATH, REF

Press the channel key from the front panel to display the

channel’s menu. Pressing it again turns the display of the

channel on or off. The channel is displayed when the key is

illuminated.

You must be viewing the menu for a channel before you can

turn it off. For example, if CH1 and CH2 are both displayed

and the CH2 menu is now displayed. In order to turn CH1 off,

you should press the CH1 key first and CH1 menu will be

displayed; then press CH1 key again to turn off CH1.

Vertical Scale Control (CH1, CH2)

Turn the large vertical scale knob below the channel key to

set the scale factor for the channel. The vertical scale knob

changes the channel scale in a 1-2-5 step sequence. The

scale factor value is displayed in the bottom left portion of the

display.

Press the large vertical scale knob to toggle between Fine

and Coarse. When fine is selected, you can change the

channel’s vertical sensitivity in smaller steps. This is useful

when you want to scale the displayed waveform to an exact

Basic Operation

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size. When coarse is selected, the vertical scale knob

changes the channel scale in a 1-2-5 step sequence.



CH1, CH2 Menu

Press the channel key CH1 to display the channel’s menu

and turn the display of the channel on.

Channel Coupling

Press the channel key CH1, then press the Coupling softkey

to select AC coupling mode.

AC coupling places a high pass filter in series with the input

waveform that blocks the DC component of the input signal.

AC coupling is useful for viewing waveforms with DC offsets.

AC Coupling

Basic Operation

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Press the channel key CH1, then press the Coupling softkey

to select DC coupling mode.

DC coupling passes both AC and DC components of the

input signal. DC coupling is useful for viewing low frequency

waveforms that do not have large DC offsets.

DC Coupling

Basic Operation

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Press the channel key CH1, then press the Coupling softkey

to select GND coupling mode.

GND mode blocks both AC and DC components of the input

signal by grounding the channel amplifier’s input.

GND Coupling

Basic Operation

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Bandwidth Limit

When Bandwidth limit is on, the maximum bandwidth for the

channel is approximately 20 MHz. For waveforms with

frequencies below this, turning bandwidth limit on removes

unwanted high frequency noise from the waveform. The

bandwidth limit also limits the trigger signal path’s bandwidth

of any channel that has BW Limit turned on.

Press the channel key CH1, then press the BW Limit softkey

to turn the bandwidth limit off for the selected channel 1. BW

Limit off mode passes both the high and low frequency

components.

BW Limit off

Basic Operation

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Press the channel key CH1, then press the BW Limit softkey

to turn the bandwidth limit on for the selected channel 1. BW

Limit on mode blocks the high frequency components over

20MHz.

BW Limit on

Basic Operation

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Probe Attenuation Setting

Probes are available with various attenuation factors which

affect the vertical scale of the signal. You can manually select

the factor that matches the attenuation of your probe. This

allows you to see the correct measured values for

waveforms.

For example, to match a probe set to 1X connected to CH1,

press the channel key CH1, and then press the Probe

softkey and select 1X.

Set Probe Attenuation Factor to 1X

Basic Operation

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Digital Filter

Press the channel key CH1, then press the Digital Filter

softkey to display the FILTER-CH1 menu. Four kinds of filter

types are available:

Low pass filter

High pass filter

Band pass filter

Notch filter

Press the Upper Limit or Lower Limit softkey and then

adjust the Entry knob

to set the high and low frequency

range for the filter.

Digital Filter is off

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Digital Filter is on

Basic Operation

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Vertical Scale

Turn the large vertical scale knob below the channel key to

set the scale factor for the channel. The channel scale factor

value is displayed in the bottom left portion of the display. Press CH1 More 1/2  Volts Scale to select Coarse or

Fine adjustment. You can also press the large vertical scale

knob to toggle between Coarse and Fine. When Coarse is

selected, the vertical scale knob changes the channel scale

in a 1-2-5 step sequence. When Fine is selected, the vertical

scale knob changes the channel scale using a smaller step

size.

Fine Vertical Scale

Basic Operation

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Vertical Invert

Press CH1 More 1/2  Invert to turn Invert on or off.

When Invert is turned on, the voltage values of the displayed

waveform are inverted. Invert affects how a channel is

displayed, but does not affect triggering. If the oscilloscope is

set to trigger on a rising edge, it remains set to trigger on a

same edge after the channel is inverted. If the signal is

represented as f(t), then inverting the signal displays –f(t).

Inverting a channel will also change the result of any function

selected in the MATH menu or any measurement.

Vertical Invert off

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Vertical Invert on

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MATHFunctions

Dual Waveform Calculation

Press the MATH channel key to turn on the MATH menu

page1/2.

Softkey Options Description

A+B Add A and B

A-B Subtract B from A

A×B

Multiply A by B

Operate

FFT Access FFT menu

CH1 Select CH1 as Source A

Source A

CH2 Select CH2 as Source A

CH1 Select CH1 as Source B

Source B

CH2 Select CH2 as Source B

ON Invert ON

Invert

OFF Invert OFF

More 1/2

---- Select page 2/2

Basic Operation



Press the softkey More ½ to display the MATH menu page

2/2.

Softkey Options Description

A+B Add A and B

A-B Subtract B from A

A×B

Multiply A by B

Operate

FFT Access FFT menu

Vertical scale control



Vertical position control

Split

Screen

Split the display into Main

and Math sections

Display

Mode

Full

Screen

Display Math waveform

in full screen

More 2/2

---- Select page 1/2

Basic Operation

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For example, we select the A+B math function, select CH1 as

the Source A, and select CH2 as the Source B, then we will

see the math waveform displayed in red as follows:

Math A+B

FFT Spectrum Analysis

You can use the FFT function to measure, for example, the

harmonic content and distortion in systems, to characterize

noise in DC power supplies, and to analyze vibration.

Basic Operation

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Press the MATH key to turn on the MATH menu page 1/2,

and then press the Operate softkey to select FFT. The FFT

menu page 1/2 will be displayed.

Softkey Options Description

A+B Add A and B

A-B Subtract B from A

A×B

Multiply A by B

Operate

FFT Enter FFT menu

CH1 Select CH1 for FFT

Source

CH2 Select CH2 for FFT

Hanning Use Hanning window

Hamming Use Hamming window

Blackman Use Blackman window

Flattop Use Flattop window

Window

Rectangular

Use Rectangular

window

dBV RMS

Vertical scale in dBV

RMS

Scale

V RMS Vertical scale in V RMS

More 1/2

---- Select page 2/2

Basic Operation



Press the softkey More 1/2 to display the FFT menu page

2/2.

Softkey Options Description

A+B Add A and B

A-B Subtract B from A

A×B

Multiply A by B

Operate

FFT Enter FFT menu

Vertical scale control



Vertical position control

Split

Screen

Split the display into

Main and Math sections

Display

Mode

Full

Screen

Display Math waveform

in full screen

More 2/2

---- Select page 1/2

Basic Operation



For example, we select CH1 as the source for the FFT, select

the rectangular window, set the vertical scale to dBV RMS,

and then we will get an FFT waveform similar to the following

figure. We can also measure the amplitude and frequency of

FFT points with the manual cursors ( see chapter application

examples, example “measure Frequency and Amplitude of a

FFT waveform”)

FFT Spectrum Analysis

Basic Operation

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REF Function

You might make measurement on a known good system,

save the result to internal memory or to a USB mass storage

device, then make the same measurement on a test system

and recall the reference waveform to see the difference.

Press the REF channel key to turn on the REF menu page

1/2.

Softkey Options Description

CH1 Save CH1 as reference

Source

CH2 Save CH2 as reference

REF vertical scale control

REF vertical position control

ON REF invert ON

Invert

OFF REF invert OFF

1/2

---- Select page 2/2

Basic Operation



Press the softkey More 1/2 to display REF menu page 2/2.

Press REF channel key to turn on the REF menu page 1/2

and load the latest saved reference waveform at the same

time from the internal memory.

You can use the horizontal position and scale control knob to

change the time base of the reference waveform.

Press

or softkey and turn the Entry knob

to change the vertical scale or position of the reference

waveform.

Softkey Options Description

Internal

Storage

INTERNAL

Save the reference

waveform to

internal memory.

External

Storage

EXTERNAL

Save the reference

waveform to a USB

mass storage

device.

2/2

---- Select page 1/2

Basic Operation



Press REF Internal Storage Save to save the waveform

of the Source channel as the reference waveform to internal

memory.

Save a Reference waveform

Note: The reference waveform function is unavailable

when X-Y mode is selected.

Basic Operation

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Horizontal Controls

Use the horizontal controls to adjust the time base, adjust the

trigger location, and to examine waveform details more

closely.

Horizontal Controls

Basic Operation

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Horizontal Position Control

When the oscilloscope is in run mode, this control lets you set

the acquisition window relative to the trigger point. When

acquisition is stopped, you can turn this knob to pan through

the data horizontally. This lets you see the captured

waveform before the trigger or after the trigger.

The trigger position is marked with the letter “T” at the top of

the graticule and also in the waveform record icon at the top

of the screen.

The small inverted triangle is the time reference indicator.

When you change the horizontal scale, the waveforms

contract or expand about this point.

Press the horizontal position control knob to set the time

delay to zero. Then the trigger position indicator (

)

overlays the time reference indicator().

Note: The horizontal position control is unavailable when

X-Y horizontal mode is selected.

Horizontal Scale Control

Use the horizontal scale control to adjust the time base. The

scale expands or contracts around the center of the screen.

The horizontal scale factor can be set in a 1-2.5-5 sequence

(2534) or in a 1-2-5 sequence (2540/2542).

Press the horizontal scale control knob to toggle between

Main and Delayed horizontal mode.

Basic Operation

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Horizontal MENU key

Press the horizontal MENU key to display the HORIZONTAL

menu. This menu lets you select the horizontal mode: Main,

Delayed, Roll, or X-Y, and set the Holdoff time.

Press the horizontal MENU key to display the HORIZONTAL

menu page 1/2.

Softkey Options Description

 Main mode is ON

Main

---- Main mode is OFF

 Delayed mode is ON

Delayed

---- Delayed mode is OFF

 X-Y mode is ON

X-Y

---- X-Y mode is OFF

 Roll mode is ON

Roll

---- Roll mode is OFF

-More-

1/2

---- Select page 2/2

Basic Operation



Press the softkey More 1/2 to display the HORIZONTAL

menu page 2/2.

Main Horizontal Mode

The Main horizontal mode is the normal viewing mode for the

oscilloscope. When acquisition is stopped, you can use the

horizontal controls to pan and zoom the waveform. When the

oscilloscope is operating in Main mode, use the horizontal

scale knob to change horizontal scale factor and use the

horizontal position knob to set the delay time. When the

oscilloscope is stopped, use the horizontal control knobs to

pan and zoom the waveform. The time base (second/division)

value is displayed at the bottom of the screen.

Softkey

Options Description

Holdoff

Set the holdoff time

between two triggers.

Holdoff

Reset

----

Reset the holdoff

time to the default

value of 100 ns.

Trig-Offset

Reset

----

Reset the delay time

to zero.

-More-

2/2

---- Select page 1/2

Basic Operation



Press the horizontal MENU key and then press the Main

softkey to select the main horizontal mode.

Main Horizontal Mode

1. The square brackets show the location of current display

window within the record.

2. Trigger position within the record.

3. Trigger position on the current waveform display window.

4. Readout shows the delay time or the trigger location

within the record relative to the time reference point ().

Basic Operation

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Delayed Horizontal Mode

Delayed horizontal mode is an expanded version of main

mode. When Delayed mode is selected, the display divides in

half. The top half of the display shows the normal waveform

and bottom half displays the delayed waveform.

The Delayed waveform is a magnified portion of the normal

waveform. You can use the delayed waveform to locate and

horizontally expand part of the normal waveform for a more

detailed analysis of the waveform.

The area of the normal display that is expanded is marked on

each end of the trace with a colored area. The uncolored

area shows what portion of the normal waveform is expanded

in the lower half.

To change the time base for the delayed window, turn the

horizontal scale knob. As you turn the knob, the time base for

the delayed window is displayed just above the main time

base.

To change the time base for the normal window, press the

Main softkey, then turn the horizontal scale control knob.

To view the following figure, connect a triangle signal to CH1,

press the horizontal MENU key and then press the Delayed

softkey to enter the Delayed mode. You can also press the

horizontal scale control knob to toggle between Main and

Delayed mode directly.

Basic Operation

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Delayed Horizontal Mode

Basic Operation

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X-Y Horizontal Mode

X-Y mode changes the display from a volts-versus-time

display to a volts-versus-volts display. The time base is

turned off. The CH1 signal is plotted on the X axis and CH2

signal is plotted on the Y axis.

You can use X-Y mode to compare the frequency and phase

relationships between two signals. X-Y mode can also be

used with voltage transducers to display, for example, strain

versus displacement, flow versus pressure, volts versus

current, or voltage versus frequency.

In order to get a better view of the waveform, the proper

vertical scale should be selected before entering the X-Y

mode.

Example: Use the X-Y mode to compare two signals with

the

same frequency and different phase. Connect the two signals

to CH1 and CH2 respectively. Press horizontal MENU key

and then X-Y softkey to select X-Y mode. The displayed

ellipse (a Lissajous figure) indicates the phase relationship of

the two signals.

Basic Operation

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X-Y Horizontal Mode

Basic Operation

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Roll Horizontal Mode

Roll mode causes the waveform to move slowly across the

screen from right to left. It only operates on time base

settings of 500 ms/div or slower. If the current time base

setting is faster than the 500 ms/div limit, it will be set to

500ms/div when Roll mode is selected.

In Roll mode there is no trigger. The fixed reference point on

the screen is the right edge of the screen and refers to the

current moment in time. Events that have occurred are

scrolled to the left of the reference point. Since there is no

trigger, no pre-trigger information is available.

If you would like to pause the display in Roll mode, press the

SINGLE key. To clear the display and restart an acquisition

in Roll mode, press the SINGLE key again.

Use Roll mode on low-frequency waveforms to yield a display

much like a strip chart recorder. The waveform will “roll”

across the display.

Press the horizontal MENU key and then press the Roll

softkey to select the Roll mode. The waveform moves slowly

across the screen from right to left.

Basic Operation



Roll Horizontal Mode

Basic Operation



Holdoff Function

Holdoff sets the amount of time that the oscilloscope will wait

before rearming the trigger circuit. You can use the holdoff

function to stabilize the display of complex waveforms.

With the holdoff function, you can synchronize triggers. The

oscilloscope will trigger on one edge of the waveform, and

ignore further edges until the holdoff time is up. The

oscilloscope will then rearm the trigger circuit to wait for the

next edge trigger. This allows the oscilloscope to trigger on a

repeating pattern in a complex waveform.

Turn the Entry knob to increase or decrease the trigger hold

off time shown in the Holdoff softkey.

To get a stable trigger on the pulse burst shown on the

screen, set the holdoff time to be slightly less than the period

of the pulse burst.

Basic Operation



Holdoff Function

Basic Operation



Trigger Controls

The trigger controls determine when the oscilloscope starts

to acquire and display the waveform. When a trigger is found,

the oscilloscope will acquire sufficent data to display the

waveform. The trigger controls are functional when the

oscilloscope is in Main or Delayed horizontal mode.

Trigger Controls

Basic Operation



Trigger Control MENU key

Press the trigger control MENU key to show the TRIGGER

menu and then press the Type softkey to select Edge, Pulse

or Video.

Set to 50% key

Press the 50% key to set the trigger level to the 50%

amplitude level of the trigger source waveform.

Force Trigger key and secondary Local function

Press the FORCE key to force an immediate trigger event,

even in the absence of a signal. This function is useful in the

following situations.

If you do not see a waveform on the screen when using

Normal trigger mode, press the FORCE key to see if the

signal is on the screen (if not, you might have to adjust the

vertical position).

After you press the SINGLE key to set up for a single shot

acquisition, you can press the FORCE key to do a practice

acquisition to verify the control settings.

When the instrument is in remote mode, pressing this button

will revert the instrument to local mode. This function is

useful to set the DSO back to local mode after exiting the

Comsoft PC application.

Basic Operation



Trigger Level Control

Use the trigger level control knob to adjust the trigger level.

This is the voltage level on the trigger waveform that causes

a trigger event. When you change the trigger level, a

horizontal line temporarily appears to show you the trigger

level on the screen. After the line disappears, the trigger level

is marked with a small left arrow.

Auto and Normal Trigger Modes

Press the trigger MENU key to display the TRIGGER menu

and press the Mode softkey to select Auto or Normal trigger

mode.

Note: The Auto and Normal trigger mode are unavailable

when the Video trigger type is selected.

Auto mode

Use the auto trigger mode for signals other than low

repetitive-rate signals and for unknown signal levels. To

display a DC signal, you must use Auto trigger mode since

there is no edge to trigger on.

When you press the RUN/STOP key to start acquiring a

waveform, the oscilloscope first fills the pre-trigger buffer. It

then starts to search for a trigger after the pre-trigger buffer is

filled and continues to flow data through this buffer while it

searches for the trigger. While searching for the trigger, if the

oscilloscope overflows the pre-trigger buffer, the first data put

into the buffer is the first pushed out. When a trigger is found,

Basic Operation



the pre-trigger buffer will contain the events that occurred just

before the trigger. If no trigger is found, the oscilloscope

generates a trigger and displays the data as though a trigger

had occurred. In this case, the background of the Auto

indicator at the top of the display will flash, indicating that the

oscilloscope auto triggered.

When you press the SINGLE key, the oscilloscope will fill the

pre-trigger buffer and continue to flow data through the

pre-trigger buffer until the Auto trigger overrides the

searching and forces a trigger. At the end of the trace, the

oscilloscope will stop and display the results.

Normal mode

Use Normal trigger mode for low repetitive-rate signals or

when Auto trigger is not required.

In Normal mode the oscilloscope must fill the pre-trigger

buffer with data before it will begin searching for a trigger

event. While searching for the trigger, if the oscilloscope

overflows the pre-trigger buffer; the first data put into the

buffer is the first pushed out.

When the trigger event is found, the oscilloscope will fill the

post-trigger buffer and display the results. If the acquisition

was initiated by RUN/STOP, the process repeats. If the

acquisition was initiated by SINGLE, then the acquisition

stops.

Basic Operation



In either Auto or Normal mode, the trigger may be missed.

This is because the oscilloscope will not recognize a trigger

event until the pre-trigger buffer is full.

Video Trigger

Choose video triggering to trigger on the odd fields, even

fields, or on all the lines of a NTSC or PAL/SECAM video

signal.

Press the trigger control MENU key to display the TRIGGER

menu, then press the Type softkey to select Video trigger.

Basic Operation



Softkey Options Description

Video Video triggering

Edge Edge triggering

Type

Pulse Pulse width triggering

CH1 Trigger on CH1

CH2 Trigger on CH2

EXT Trigger on EXT

EXT/5 Trigger on EXT/5

Source

Alternating

Trigger on CH1 and

CH2 alternately

Positive polarity

Polarity

Negative polarity

Odd Field Trigger on odd fields

Even Field Trigger on even fields

All Lines Trigger on all lines

Sync

Line #

Trigger on a specific

line

NTSC

Trigger on NTSC

signal

Standard

PAL/SECAM

Trigger on PAL or

SECAM signal

Basic Operation



The following figures show the video waveforms triggered on

odd fields and line 6.



Trigger on odd fields

Trigger on specific line 6

Basic Operation



Note: The trigger level control is unavailable when Video

type is selected.



Edge Trigger

Use edge triggering to trigger on the rising or falling edge of

the input signal at the trigger threshold.

Basic Operation



Press the trigger control MENU key to display the TRIGGER

menu, then press the Type softkey to select Edge trigger.

Softkey Options Description

Video Video triggering

Edge Edge triggering Type

Pulse Pulse width triggering

CH1 Trigger on CH1

CH2 Trigger on CH2

EXT Trigger on EXT

EXT/5 Trigger on EXT/5

AC Line

Trigger on AC line signal

Source

Alternating

Trigger on CH1 and CH2

alternately

Rising edge of a signal

Slope

Falling edge of a signal

Auto Trigger even without a valid event.

Mode

Normal Trigger only on a valid event

AC AC coupling

DC DC coupling

Reject

Reject low frequencies

Coupling

Reject

Reject high frequencies

Basic Operation



Pulse Width Trigger

Pulse width triggering sets the oscilloscope to trigger on a

positive or negative pulse of a specified width from 20ns to

10s.

Basic Operation



Press the trigger control MENU key to display the TRIGGER

menu, then press the Type softkey to select Pulse trigger.

Softkey Options Description

Video Video triggering

Edge Edge triggering Type

Pulse Pulse width triggering

CH1 Trigger on CH1

CH2 Trigger on CH2

EXT Trigger on EXT

EXT/5 Trigger on EXT/5

Source

Alternating

CH1 and CH2

alternately

Positive greater than

Positive equal

Positive within

Positive less than

Negative greater than

Negative equal

Negative within

Pulse

Mode

Negative less than

Pulse

Setup

Set the pulse width

More 1/2

---- Select page 2/2

Basic Operation



Press the trigger control MENU key to display the TRIGGER

menu, press the Type softkey to select Pulse trigger, and

then press the More 1/2 softkey to display TRIGGER menu

page 2/2.

Softkey Options Description

Video Video triggering

Edge Edge triggering Type

Pulse Pulse width triggering

Auto

Trigger even without a

valid event.

Mode

Normal

Trigger only on a valid

event

AC AC coupling

DC DC coupling

Reject

Reject low frequencies

Coupling

Reject

Reject high frequencies

2/2

---- Select page 1/2

Basic Operation



ACQUIRE Menu

Press the ACQUIRE menu key to show the ACQUIRE menu.

ACQUIRE Menu key

Normal acquisition mode yields the best display for most

waveforms.

Average mode lets you average multiple waveforms to

reduce noise and increase resolution.

Peak Detect mode should be used to display narrow pulses

that occur infrequently. It’s useful when looking for very

narow pulses at very slow time base.

Equivalent sampling mode is useful to display high

frequency repetitive signals.

Real Time sampling mode is useful to capture single-shot

signals.

Press the Mode softkey to select the Normal mode.

Basic Operation



Softkey Options Description

Normal Normal acquisition.

Average

Average the

waveforms.

Mode

Peak Detect

Peak detect

acquisition.

Equivalent Equivalent sampling.

Sampling

Real Time Real time sampling.

Record

---- Select Record menu.

Basic Operation



Press the Mode softkey to select the Average mode.

Softkey Options Description

Normal Normal acquisition.

Average

Averages the

waveforms.

Mode

Peak

Detect

Peak detect

acquisition.

Averages

Set the average

number to 2, 4, 8, 16,

32, 64, 128, or 256.

Equivalent Equivalent sampling.

Sampling

Real Time Real time sampling.

Record

---- Select Record menu.

 Press the Mode softkey to select the Peak Detect mode.

Softkey Options Description

Normal Normal acquisition.

Average

Averages the

waveforms.

Mode

Peak

Detect

Peak detect

acquisition.

Equivalent Equivalent sampling.

Sampling

Real Time Real time sampling.

Record

---- Select Record menu.

Basic Operation



Connect a sine wave signal to the CH1 channel, press ACQUIRE  Mode to select Average mode. Turn the Entry

knob to set the number of averages to 16. The following two

figures show the difference between Normal acquisition and

Average acquisition.

Random noise on the displayed waveform

Basic Operation



Average count of 16 selected to reduce random noise

Basic Operation



Waveform recorder

The waveform recorder can record input waveforms in a sequence of frames originating from channel 1 or channel 2, with a maximum acquisition depth of 1000 frames of 4k data

points each. The time interval between each frame is adjustable from 1ms – 1000s. The waveform recorder lets

you monitor and analyze long term signal behavior by

recording data continuously over long periods of time then playing it back for post acquisition analysis.

Press ACQUIRE  Record to show the RECORD menu.

Softkey Options Description

Record Record waveform.

Play

Back

Play back a recorded

waveform.

Save

/Recall

Save/Recall from

internal or external

memory.

Mode

OFF Exit Record function.

CH1 Record CH1 channel.

CH2 Record CH2 channel.

Source

Pass/Fail

Out

Record waveform

from Pass/Fail mask

test

Basic Operation



Interval

Set the time interval

between captured

frames. <1ms –

1000s>

End

Frame

Set the number of

frames you want to

record

Start recording.

Operate



Stop recording

Basic Operation



Play back the record waveform sequence (menu 1 of 2

Press ACQUIRE  Record to show the RECORD menu.

Press the Mode softkey to select the Play Back function.

Softkey Options Description

Record Record the waveform

Play

Back

Play back a recorded

waveform.

Save

/Recall

Save/Recall from

internal or external

memory.

Mode

OFF Exit Record function



Start Playback

Operate



Stop Playback

Continuous play mode

Play

Mode

One time play mode

Current

Frame

Select a specific

frame within the frame

sequence and display

it on screen

1/2

---- Select menu page 2/2

Press the More ½ button to show RECORD menu page 2

Basic Operation



Play back the record waveform sequence (menu 2 of 2) Press ACQUIRE  Record to show the RECORD menu.

Softkey Options Description

Interval

Set the playback interval

between two frames

Start

Frame

Set the start frame to

playback

End

Frame

Set the end frame to

playback

Turn recorder message

display on

Msg

Display

OFF

Turn recorder message

display off

2/2

---- Select menu page 1/2

Basic Operation



Save/Recall the recorded waveform

Press ACQUIRE  Record to show the RECORD menu.

Press the Mode softkey to select the Save/Recall function.

Softkey Options Description

Record Record the waveform.

Play

back

Play back a recorded

waveform.

Save

/Recall

Save/Recall from

internal or external

memory.

Mode

OFF Exit Record function

Start

Frame

Set the first frame to

be saved.

End

Frame

Set the last frame to

be saved

Internal

Storage

----

Save/Recall from

internal memory.

External

Storage

----

Save/Recall from

external memory.

Basic Operation



Exit the waveform recorder

Press the Mode softkey to select the OFF option and return

to the ACQUIRE menu.

Softkey Options Description

Record Record the waveform

Play back Play back the record

Save

/Recall

Save/Recall from

internal or external

memory

Mode

OFF Exit Record function

----

Return to ACQUIRE

Basic Operation



UTILITY Menu

Press the UTILITY menu key to show the UTILITY menu.

UTILITY Menu key

Basic Operation



Press the UTILITY key to display the UTILITY menu page

1/2.

Softkey Options Description

I/O Setup

----

Select I/O SETUP menu

Setup

----

Select PRINT menu

System

Setup

----

Select SYSTEM menu

English default

Language

More 1/2

---- Select menu page 2/2

Press the More 1/2 softkey to display the UTILITY menu

page 2/2.

Softkey Options Description

Service

----

Select Service menu

Pass/Fail

----

Select PASS/FAIL menu

RUN/STOP

Start self-calibration

Self-Cal

AUTO

Exit self-calibration

More 2/2

---- Select menu page 1/2

Basic Operation



I/O Setup Press UTILITY  I/O Setup to display the I/O SETUP menu.

Softkey Options Description

USB Slave Select USB

RS232C Select RS232C Type

GPIB Select GPIB

----

Return to the

UTILITY menu

Note: An optional expansion module is required to

remotely control the instrument via RS232 and GPIB

interface. Contact B&K Precision Corp. for details and

availability.

Basic Operation



Print Setup

Press UTILITY  Print Setup to display the PRINT menu.

Press the Print to softkey to select File.

Softkey Options Description

Print to

File Print to file

BMP BMP file format

File Type

CSV CSV file format

----

Return to the UTILITY

Connect a USB mass storage device to the USB host

connector on the front or rear panel.

Press the File Type softkey to select the file format you want.

BMP is a bitmap of the screen and CSV are

comma-separated values. CSV format can be imported into

spreadsheets such as Excel.

Press the PRINT key to save the file to the USB mass

storage device.

Basic Operation



System Setup

Press UTILITY  System Setup to display the SYSTEM

menu.

Softkey Options Description

Key press sound on

Key

Sound

Key press sound off

Alarm sound on

Alarm

Sound

Alarm sound off

ON Frequency counter on

Counter

OFF Frequency counter off

Set Date

&Time

----

Select the DATE&TIME

----

Return to the UTILITY

Note: With Alarm set to “On”, you will hear a beep under the

following conditions: A control reached its limit or an

invalid setting or configuration was encountered, in

which case you will also see a warning message

displayed on screen (example: Auto button is

pressed without detecting a signal).

Basic Operation



Press the Set Date&Time softkey to display the

DATE&TIME menu.

Softkey Options Description

ON Date & time display on

Display

OFF Date & time display off

Set hour

Hour

Min

Set minute

Set month

Month

Day

Set day

Year

Set year

OK! Enter

---- Apply the time and date

Basic Operation



Service Press UTILITY  Service to display the Service menu.

Softkey Options Description

System

Information

----

Display system

information: Model,

Serial number,

Software version,

Installed modules.

Screen

Test

---- Test the LCD screen.

Key Test

----

Check keys and

controls operation.

----

Return to the UTILITY

menu.

Basic Operation



Press UTILITY  Service to display the Service menu, then

press the System Info softkey to display the system

information, such as Model, Serial number, Power up times,

Software version and a list of installed modules.

System Information

Basic Operation



Pass/Fail Mask test

The Mask Test function monitors waveform changes by. If the input signal is within the mask threshold, a PASS verdict will be generated. If the input signal lies outside the threshold, a FAIL verdict will be generated. For step by step setup instructions, refer to the Application examples in chapter 3, section Pass/Fail measurement.

Press UTILITY  Pass/Fail to display the PASS/FAIL menu

1/2.

Softkey Options Description

ON Turn mask function on

Enable

Test

OFF Turn mask function off

CH1 Source signal is CH1

Source

CH2 Source signal is CH2



Start Pass/Fail test

Operate



Stop Pass/Fail test

Setup Mask

----

Set up the

specifications

More 1/2

---- Display the menu 2/2

Basic Operation



Press More 1/2 to display the PASS/FAIL menu 2/2.

Softkey Options Description

ON Display P/F information

Msg

Display

OFF

Turn Display P/F

information off

PASS Indicate Pass condition

PASS+

Output to screen and

sound alarm on Pass

condition

FAIL Indicate Fail condition

Output

FAIL+

Output to screen and

sound alarm on Fail

condition

ON Stop sampling on output

Stop on

Output

OFF

Continue sampling on

output

----

Return to the UTILITY

More 2/2

----

Display the menu page

1/2

Note:The Pass/Fail function is not available when X-Y

mode is selected.

Basic Operation



Press UTILITY  Pass/Fail  Setup Mask to display the

MASK menu 1/2.

Softkey Options Description

X Mask

Set the mask’s

horizontal failure margin

Y Mask

Set the mask’s vertical

failure margin

Create

Mask

----

Create the P/F mask

based on the current

waveform and the

above failure margins

----

Return to the

PASS/FAIL menu

1/2

----

Display the menu 2/2

Basic Operation



Press More 1/2 to display the MASK menu 2/2.

Softkey Options Description

Internal

Storage

----

Store the PASS/FAIL

tolerance mask to

internal memory.

External

Storage

----

Store the PASS/FAIL

tolerance mask to

external USB mass

storage device.

----

Return to the

PASS/FAIL menu.

More 2/2 ----

Display the menu page

½.

Basic Operation



Self-Calibration

To maximize the measurement accuracy, it is recoomended

to perform a self-calibration.

Self-calibration uses internally-generated signals to calibrate

circuits that affect channel scale, offset, and trigger

parameters. Disconnect all inputs and allow the oscilloscope

to warm up for at least 30 minutes before performing a

self-calibration. Press UTILITY  Self-Cal to display the self-calibration

page. Press the AUTO key to exit the self-calibration page.

Press the RUN key to start the self-calibration.

Self Calibration

Basic Operation



Note: Warm up the oscilloscope for at least 30 minutes

before performing self-calibration.

MEASURE Menu

MEASURE Menu key

Basic Operation



Press the MEASURE key to display the MEASURE menu.

Softkey Options Description

CH1 Measure CH1

Source

CH2 Measure CH2

Voltage

----

Select the Voltage

measurement menu.

Time

----

Select the Time

measurement menu.

Clear

----

Turn off the

measurement readouts.

Display all

measurements.

Measure

All

OFF

Turn off all

measurements.

Basic Operation



Voltage Measurements

Press MEASURE  Voltage to display the VOLTAGE menu

page 1/4.

Softkey Options Description

Peak-Peak

----

The Peak-Peak value is

the difference between

maximum and minimum

values.

Amplitude

----

The Amplitude value is

the difference between

its High and Low values.

Max

----

Max is the maximum

voltage in the waveform

display.

Min

----

Min is the minimum

voltage in the waveform

display

More 1/4

---- Display menu page 2/4

Basic Operation



Press the More 1/4 softkey to display the VOLTAGE menu

page 2/4.

Softkey Options Description

High

----

Measures the flattop

voltage (average value)

of the upper part of the

waveform.

Low

----

Measures the flat base

voltage (average value)

of the upper part of the

waveform.

Average

----

Average value is the sum

of the samples divided by

the number of samples

over the entire waveform.

RMS

----

RMS value is the true

Root Mean Square

voltage over the entire

waveform.

2/4

---- Display menu page ¾.

Basic Operation



Press the More 2/4 softkey to display the VOLTAGE menu

page 3/4.

Softkey Options Description

Cycle Avg

----

The Cycle Avg value is

the sum of the samples

divided by the number of

samples over one period.

Cycle

RMS

----

The Cycle RMS value is

the true Root Mean

Square voltage over one

period.

Overshoot

----

The Overshoot value is

the distortion that follows

a major edge transition

expressed as a

percentage of amplitude.

Preshoot

----

The Preshoot value is the

distortion that precedes a

major edge transition

expressed as a

percentage of amplitude.

More 3/4

---- Display menu page 4/4.

Basic Operation



Press the More 3/4 softkey to display the VOLTAGE menu

page 4/4.

Softkey Options Description

----

Return to the MEASURE

More 4/4

---- Display menu page 1/4

Basic Operation



Time Measurements Press MEASURE  Time to display the TIME menu page

1/5.

Softkey Options Description

Frequency

----

Frequency is defined as

1/period of the first

cycle.

Period

----

Period is the time period

of the first complete

waveform cycle.

Rise Time

----

Rise Time is the time

that the first

positive-going edge

takes to rise from 10% to

90% of its amplitude.

Fall Time

----

Fall Time is the time that

the first negative-going

edge takes to fall from

90% to 10% of its

amplitude.

More 1/5

---- Display menu page 2/5.

Basic Operation



Press More 1/5 softkey to display the TIME menu page 2/5.

Softkey Options Description

+Width

----

+Width is the time

between the 50%

amplitude points of the

first positive pulse.

-Width

----

-Width is the time

between the 50%

amplitude points of the

first negative pulse.

+Duty

----

+Duty is the ratio of the

first positive width to its

period, expressed as a

percentage.

-Duty

----

-Duty is the ratio of the

first negative width to its

period, expressed as a

percentage.

More 2/5

---- Display menu page 3/5.

Basic Operation



Press the More 2/5 softkey to display the TIME menu page

3/5.

Softkey Options Description

Delay

----

Measures the delay

between 2 waveforms

using the first rising edge

of each channel as

reference.

Delay

----

Measures the delay

between 2 waveforms

using the first falling edge

of each channel as

reference.

Delay

----

Measures the delay

between 2 waveforms

using the time between

the first rising edge of

CH1 and the first falling

edge of CH2 (50%

amplitude point.

Basic Operation



100

Delay

----

Measures the delay

between 2 waveforms

using the time between

the first falling edge of

CH1 and the first rising

edge of CH2.

More 3/5

---- Display menu page 4/5.

Basic Operation



101

Press the More 3/5 softkey to display the TIME menu page

4/5.

Softkey Options Description

Phase

1→2

----

Phase 12 is the time in

degrees between

corresponding points from

waveforms 1 to waveform

2. [See note]

Phase

2→1

----

Phase 21 is the time in

degrees between

corresponding points from

waveforms 1 to waveform

2. [See note]

X at Max

----

X at Max is the X axis value

(i.e., time) referred to the

trigger point at the first

displayed occurrence of the

waveform Maximum,

starting from the left side of

the display to the following

waveform maximum.

Basic Operation



102

X at Min

----

X at Min is the X axis value

(i.e., time) referred to the

trigger point at the first

displayed occurrence of the

waveform Minimum,

starting from the left side of

the display, to the following

waveforms minimum

More 4/5

---- Display menu page 5/5

Note: time in degrees between the two points is calculated

by measuring the time between the two points, dividing the

time by the waveform’s period, then multiplying the fraction

by 360 degrees.

Press the More 4/5 softkey to display the TIME menu page

5/5.

Softkey Options Description

----

Return to the MEASURE

More 5/5

---- Display menu page 1/5

Basic Operation



103

Automatic Measurement Procedure

Press MEASURE  Measure All to turn on Auto

Measurements. Up to 20 measurements of the current

channel are displayed at the center of the screen.

Press the Measure All softkey again to turn off Auto

Measurements. Press MEASURE  Voltage to display the VOLTAGE menu or press MEASURE  Time to display the TIME menu.

Press the softkey of the voltage or time parameters you want

to measure.

The selected parameter will be displayed on the bottom of

the display.

Basic Operation



104

Press the Clear softkey to clear all displayed measurement

parameter.

Note: Up to three parameters can be displayed at the

same time on the bottom of the display. When three parameters are already displayed, the first parameter will be pushed out of the display window when a new parameter is chosen for display.

Note: “****” will be displayed when a parameter cannot

be measured correctly.

Basic Operation



105

Measurement definitions

The following figure shows the voltage measurement points.

The following figure shows the time measurement points.

Basic Operation



106

SAVE/LOAD Menu

SAVE/LOAD MENU key

Press the SAVE/LOAD key to display the SAVE/LOAD

menu.

Softkey Options Description

Internal

Storage

----

Display the INTERNAL

menu.

External

Storage

----

Display the EXTERNAL

menu.

Factory

----

Set the instrument to the

factory default

configuration.

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Internal Storage

Press SAVE/LOADInternal StorageStorage type to

display the INTERNAL menu and select Waveforms storage

type.

Softkey Options Description

Waveforms

Waveform file format

Storage

type

Setups Setup file format

Wavexx

mm/dd/yy

hh/mm

Select a waveform file from

Wave01 to Wave10. Date

and time of the current file

are displayed.

Save

----

Save the display to the

current waveform file.

Load

----

Load the current waveform

file.

----

Return to the SAVE/LOAD

menu.

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Press SAVE/LOADInternal StorageStorage type to

display the INTERNAL menu and select Setups storage type.

Softkey Options Description

Waveforms

Waveform file format

Storage

type

Setups Setup file format

Setupxx

mm/dd/yy

hh/mm

Select a setup file from

Setup01 to Setup10. The

date and time of the current

file are displayed.

Save

----

Save the current

configuration to the

selected setup file.

Load

----

Load from the selected

setup file.

----

Return to the SAVE/LOAD

menu.

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External Storage Press SAVE/LOADExternal Storage to display the

EXTERNAL menu.

Softkey Options Description

New

----

Create a new file or folder in

the external memory.

Rename

----

Rename the current file or

folder.

Load

---- Load the current file.

Delete

----

Delete the current file or

folder.

----

Return to the SAVE/LOAD

Note: The above External Storage menu is only available

if a USB flashdrive is connected to the front panel USB host port.

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Press SAVE/LOADExternal StorageNew to display the

New menu.

Softkey Options Description

New File

----

Display the New File menu.

New

Folder

----

Display the New Folder

menu.

----

Return to the EXTERNAL

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Press SAVE/LOADExternal StorageNewNew File to

display the New File menu.

Softkey Options Description

Setups Save as setup files

Waveforms

Save as waveform files

BMP Save as BMP files

Save as

CSV Save as CSV files

Enter

Character

----

Enter the selected

character and go to the

next character position.

Delete

Character

----

Delete the selected

character.

Save

---- Save the new file.

----

Return to the New menu.

Note: The maximum length of a file name is 8 characters.

Press Enter Character to select a character position in the file name. Turn the entry knob to select a character. Press Delete Character to delete the selected character. Press Enter Character to enter the selected character and go to the next character position.

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Press SAVE/LOADExternal StorageNewNew Foler

to display the New Folder menu.

Softkey Options Description

Enter

Character

----

Enter the selected

character and go to the

next character position.

Delete

Character

----

Delete the selected

character.

Save

---- Save the new folder.

----

Return to the New

menu.

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Press SAVE/LOADExternal StorageRename to display

the Rename menu.

Softkey Options Description

Enter

Character

----

Enter the selected

character and go to the

next character position.

Delete

Character

----

Delete the selected

character.

----

Rename the selected file

or folder.

----

Return to the

EXTERNAL menu.

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Press SAVE/LOADExternal StorageDelete to display

the Delete menu.

Softkey Options Description

----

Confirm the deletion of

the selected file or folder.

Cancel

----

Cancel the deletion

operation.

----

Return to the

EXTERNAL menu.

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Firmware Update

The oscilloscope firmware can be conveniently updated via

the front panel USB host interface. Press SAVE/LOADExternal Storage to display the

EXTERNAL menu.

Turn the entry knob to select the correct update file. The file

2042A.UPT is selected as shown in the following figure.

Press the Load softkey to start the update operation. A

loading progress bar and then an updating progress bar will

be displayed and indicate the progress of the update

operation.

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Finally, the message “Restart to complete updating” will

be displayed to remind you to restart (power cycle) the

instrument.

If the software update failed, repeat the above procedures to

update again.

Note: The default file extension of the update file is ”.upt”.

Select the correct update file according to the model of the oscilloscope. The error message “Incompatible file ” will be displayed if the file is not the correct one for your oscilloscope.

Note: Power to the oscilloscope must not be turned off

during the updating process. If this happens, you will have to return the instrument to the factory for service.

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CURSOR Menu

You can measure waveform parameters using the cursors.

Cursors are horizontal and vertical markers that indicate

X-axis values (usually time) and Y-axis (usually voltage) on a

selected waveform . The position of the cursors can be

moved by turning the Entry knob.

Cursor Menu key

The oscilloscope provides three kinds of cursor

measurement modes: Manual, Auto and Track.

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Manual Cursor Mode

In manual cursor mode, you can move the cursors to

measure the voltage or time on the selected waveform. Press CURSORMode to display the CURSOR menu and

select the Manual mode. Press the Type softkey to select

Voltage measurement.

Softkey Options Description

Manual Manual cursor measurement

Auto Auto cursor measurement Mode

Track Track cursor measurement

CH1 Measure CH1

CH2 Measure CH1 Source

MATH Measure MATH

Voltage Measure voltage value

Type

Time Measure time value

Y1--

Y2--

Press this softkey to active

Y1, Y2, or both Y1 and Y2

cursors for adjustment.

Current voltage values for Y1

and Y2 are displayed in the

softkey

∆Y

----

The difference value between

the Y1 and Y2 cursor voltage

values.

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Press CURSORMode to display the CURSOR menu and

select the Manual mode. Press the Type softkey to select

Time measurement.

Softkey Options Description

Manual Manual cursor measurement

Auto Auto cursor measurement Mode

Track Track cursor measurement

CH1 Measure CH1

CH2 Measure CH1 Source

MATH Measure MATH

Voltage Measure voltage value

Type

Time Measure time value

X1--

X2--

Press this softkey to select

X1, X2, or both X1 and X2

cursors for adjustment.

Current time values for X1

and X2 are displayed in the

softkey

∆X

1/∆X

----

X is the time difference

value between the X1 and

X2 cursors. 1/X is the frequency

“between” the X1 and X2

cursors.

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Track Cursor Mode

In the track mode, the screen displays two cross hair cursors.

The cross hair of the cursor is positioned on the waveform

automatically. You can adjust the selected cursor's horizontal

position on the waveform by turning the entry knob.

The oscilloscope displays the values of the coordinates on

the screen, either in the softkey area or on the top right

corner in case the menu is off.

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Press CURSORMode to display the CURSOR menu and

select the Track mode.

Softkey Options Description

Manual Manual cursor measurement

Auto Auto cursor measurement Mode

Track Track cursor measurement

CH1 Track CH1 with Cursor A

CH2 Track CH2 with Cursor A Cursor A

None Turn off Cursor A

CH1 Track CH1 with Cursor B

CH2 Track CH2 with Cursor B Cursor B

None Turn off Cursor B

Ax--

Ay--

Press this softkey to select

cursor A for adjustment. The

current X, Y axis values for

the tracking point of cursor A

are displayed in the softkey.

Bx--

By--

Press this softkey to select

cursor B for adjustment. The

current X, Y axis values for

the tracking point of Cursor B

are displayed in the softkey.

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Auto Cursor Mode

The Auto mode cursors are displayed only when the auto

measurement function is enabled. The oscilloscope displays

the auto cursors corresponding to the latest auto

measurement parameter. The Auto cursors will not be

displayed when no auto measurement parameter is selected.

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DISPLAY Menu

Display Menu key

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Press the DISPLAY menu key to display the DISPLAY menu

page 1/2.

Softkey Options Description

Vector

Vector mode draws a line

between adjacent sample

points in the waveform.

Type

Dots

Dot mode displays only

the sample points.

Display both grids and

axes.

Turn off the axes.

Turn off the grids.

Grid

Turn off both grids and

axes.

Contrast

Adjust the display contrast

and brightness.

Color

Setup

---- Select the color scheme.

More 1/2

---- Display menu page 2/2.

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125

Press More 1/2 softkey to display the DISPLAY menu page

2/2.

Softkey Options Description

The scope updates

the waveform without

erasing the

previously-displayed

waveforms.

Persist

OFF

Turn off the

persistence function

Clear

Persistence

----

Press the softkey to

erase the previous

sample points.

Normal

Select the color

display.

Waveforms

Monochrome

Select the

monochrome display.

More 2/2

----

Display menu page

1/2.

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126

RUN Controls

Run controls

Press the SINGLE key to execute a single-shot acquisition.

The key will illuminate in orange until the oscilloscope is

triggered. When the oscilloscope is triggered, the waveform

will be acquired and displayed, after which the oscilloscope

will ignore any further triggers.

The RUN/STOP key is used to manually start/stop the

oscilloscopes acquisition system. In run mode, the

oscilloscope will start looking for a trigger and the

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127

RUN/STOP key be green. When the trigger mode is set to

Normal mode, the display will not update until a trigger is

found. If the trigger mode is set to Auto mode, the

oscilloscope looks for a trigger, and if no trigger is found, it

will be triggered automatically and the input signal(s) will be

displayed immediately.

Press the RUN/STOP key again to stop acquiring data. The

RUN/STOP key will be a red color. Now you can pan across

and zoom in on the acquired waveform.

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Application Examples

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129

3. Application Examples

This section presents 7 typical application examples. These

examples highlight the features of the oscilloscope and give

you ideas on how to solve your own test problems.

Make Simple Measurements

You need to measure the amplitude and frequency of an

unknown signal on CH1.

Perform following steps to quickly display the signal.

z Connect the channel 1 probe to the unknown signal.

z Press the AUTO key.

The oscilloscope automatically sets the vertical, horizontal,

and trigger controls. You can adjust any of these controls

manually if you need to optimize the display of the waveform.

When you are using both CH1 and CH2 channels, the

Autoset function sets the vertical controls for each channel

and uses the CH1 channel to set the horizontal and trigger

controls.

The oscilloscope can automatically display most signals.

Perform following steps to measure signal amplitude and

frequency.

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130

z Press the MEASURE key to display the MEASURE

menu.

z Press the Voltage softkey to display the VOLTAGE

menu.

z Press the Amplitude softkey to measure the amplitude.

The amplitude value will be displayed at the bottom of

the screen.

z Press the MEASURE key again to display the

MEASURE menu.

z Press the Time softkey to display the TIME menu.

z Press the Frequency softkey to measure the frequency.

The frequency value will be displayed at the bottom of

the screen to the right of the voltage value.

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131

Capture a Single-Shot Signal

A digital storage oscilloscope can easily capture an

unrepeated signal:

z Connect the channel 1 probe to the unknown signal.

z Press the trigger MENU key to display the TRIGGER

menu.

z Press the Source softkey to select CH1.

z Press the Mode softkey to select the Auto trigger mode.

z Set the vertical and horizontal controls to what you

expect to be appropriate for the signal.

z Press the Type softkey from the TRIGGER menu page

1/2 to select the pulse trigger type.

z Press the More 1/2 sofkey to display the TRIGGER

menu page 2/2.

z Press the Mode softkey to select the normal trigger

mode.

z Press the More 2/2 sofkey to display the TRIGGER

menu page 1/2.

z Press the Pulse Mode softkey to select (positive

less than).

z Rotate the entry knob (

) to set up the pulse width.

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132

z Press the SINGLE key to start the search for the trigger

event. The SINGLE key is illuminated in orange

z When trigger condition is met, the captured waveform is

displayed, the SINGLE key is not lit, and the RUN/STOP

key is illuminated in red.

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133

Reduce the Random Noise on a Signal

If the test signal is noisy, you can set up the oscilloscope to

reduce the noise on the displayed waveform. First, you

stablize the displayed waveform by removing the noise from

the trigger path. Second, you reduce the noise on the

displayed waveform.

z Connect a signal to the oscilloscope. Press the AUTO

key to display the signal.

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134

z Press the Trigger MENU key to display the TRIGGER

menu.

z Press the Type softkey to select Edge trigger type.

z Press the Coupling to select HF Reject or LF Reject

coupling mode to reduce the noise from the trigger

channel.

z Press the ACQUIRE key to display the ACQUIRE menu.

z Press the Mode softkey to select Average mode.

z Rotate the entry knob (

) to set the number of averages

that best eliminates the noise from the displayed

waveform.

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135

Trigger on a Video Signal

The video trigger can be used to capture standard video

signals. The trigger circuit detects the vertical and horizontal

intervals of the waveform and produces triggers based on the

video trigger settings you have selected.

Trigger on Odd or Even Fields of the Video Signal

z Press the Trigger MENU key to display the TRIGGER

menu.

z Press the Type softkey to select the Video trigger mode.

z Press the Source softkey to select CH1 (this assumes

the signal is on channel 1).

z Press the Polarity softkey to select negative polarity .

z Press the Sync softkey to select Odd Field or Even

Field.

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136

Trigger on a Specific Line or All Lines of the Video Signal

z Press the Trigger MENU key to display the TRIGGER

menu.

z Press the Type softkey to select the Video trigger mode.

z Press the Source softkey to select CH1.

z Press the Polarity softkey to select negative polarity .

z Press the Sync softkey to select Line # or All Lines.

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137

Application Examples

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138

PASS/FAIL Measurement

The oscilloscope measures and compares the input signal

with a predefined Pass/Fail mask. If the input signal is within

the mask threshold, a PASS verdict will be generated. If the

input signal lies outside the threshold, a FAIL verdict will be

generated.

Perform the following steps to make a PASS/FAIL

measurement.

z Press the UTILITY key to display the UTILITY menu

page 1/2.

z Press the More 1/2 softkey to display the UTILITY menu

page 2/2.

z Press the Pass/Fail softkey to display the PASS/FAIL

menu.

z Press the Enable Test softkey to turn on the PASS/FAIL

measurement.

z Press the Setup Mask softkey to display the MASK

menu.

z Press the X Mask softkey and then rotate the entry knob

to setup the horizontal threshold.

z Press the Y Mask softkey and then rotate the entry knob

to setup the vertical threshold.

z Press the Create Mask softkey to update the thresholds.

z Press the

softkey to return to the PASS/FAIL menu.

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139

z Press the More 1/2 softkey to display the PASS/FAIL

menu page 2/2.

z Press the Msg Display softkey to display the Pass/Fail

measurement results on the top left corner of the screen.

z Press the Output softkey to set how the results will be

indicated.

z Press the More 2/2 to display the PASS/FAIL menu

page 1/2.

z Press the Operate softkey to start the PASS/FAIL

measurement.

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140

Waveform Recorder

The waveform recorder lets you monitor and analyze long

term signal behavior by recording data continuously over long periods of time then playing it back for post acquisition analysis. Data is recorded in a sequence of up to 1000 frames of 4k data points each and the time interval between each frame is adjustable from 1ms – 1000s.

Perform the following steps to record waveforms.

z Press the ACQUIRE key to display the ACQUIRE menu.

z Press the RECORD softkey to display the RECORD

menu.

z Press the Mode softkey to select Record mode.

z Press the Source softkey to select the source channel

CH1.

z Press the Operate key to start recording. The total

recorded frame count is displayed on the top left screen.

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141

Perform the following steps to playback the waveforms.

z Press the ACQUIRE key to display the ACQUIRE menu.

z Press the RECORD softkey to display the RECORD

menu.

z Press the Mode softkey to select Play back mode.

z Press the Play Mode softkey to select or

mode.

z Press the Start Framesoftkey and turn the entry knob to

set the start frame.

z Press the End Frame softkey and turn the entry knob to

set the end frame.

z Press the Interval softkey and turn the entry knob to set

the interval time.

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142

z Press the Operate softkey to playback the waveform.

Application Examples

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143

Perforxm the following steps to save or recall the waveform

recorded.

z Press the ACQUIRE key to display the ACQUIRE menu.

z Press the RECORD softkey to display the RECORD

menu.

z Press the Mode softkey to select Save/Recall mode.

z Press the Start Framesoftkey and turn the entry knob to

set the start frame.

z Press the End Frame softkey and turn the entry knob to

set the end frame.

z Press the Internal Storage softkey to save or load the

recorded waveform from the internal memory.

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Cursor Measurements

You can use the cursors to quickly take time and voltage

measurements on a waveform. You can use the cursors to

measure the amplitude and frequency of a FFT waveform.

You can also use the cursors to measure the phase

difference between two signals with the same frequency

when X-Y horizontal mode is selected.

Measure the time and amplitude characteristics of a

waveform

Perform the following steps to take time and frequency

measurements.

z Press the CURSOR key to display the CURSOR menu.

z Press the Mode softkey to select the Manual mode.

z Press the Type softkey to select the Time type.

z Press the X1--/ X2—softkey or press the entry knob

to select the X1 cursor.

z Rotate the entry knob

to move the X1 cursor.

z Press the X1--/ X2—softkey or press the entry knob

to select the X2 cursor.

z Rotate the entry knob

to move the X2 cursor.

z X and 1/X are displayed in the softkey area. X is the

time difference between X1 and X2; 1/X is the

frequency “between” X1 and X2.

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Perform the following steps to make a voltage measurement

on a waveform.

z Press the CURSOR key to display the CURSOR menu.

z Press the Mode softkey to select the Manual mode.

z Press the Type softkey to select the Voltage type.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y1 cursor.

z Rotate the entry knob

to move the Y1 cursor.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y2 cursor.

z Rotate the entry knob

to move the Y2 cursor.

z The Y displayed in the softkey area is the voltage

difference between Y1 and Y2.

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Measure the frequency and amplitude of an FFT signal

Perform the following steps to take frequency measurements.

z Press the MATH key to display the Math menu.

z Press the Operate softkey to select FFT and display the

FFT menu.

z Press the CURSOR key to display the CURSOR menu.

z Press the Mode softkey to select the Manual mode.

z Press the Source softkey to select FFT.

z Press the Type softkey to select the Time type.

z Press the X1--/ X2—softkey or press the entry knob

to select the X1 cursor.

z Rotate the entry knob

to move the X1 cursor.

z Press the X1--/ X2—softkey or press the entry knob

to select the X2 cursor.

z Rotate the entry knob

to move the X2 cursor.

z The X displayed in the softkey area is the frequency

difference between X1 and X2. 1/X is the time

difference between X1 and X2.

Perform the following steps to take amplitude measurements

on an FFT signal

z Press the MATH key to display the Math menu.

z Press the Operate softkey to select FFT and display the

FFT menu.

Application Examples

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147

z Press the CURSOR key to display the CURSOR menu.

z Press the Mode softkey to select the Manual mode.

z Press the Source softkey to select FFT.

z Press the Type softkey to select the Voltage type.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y1 cursor.

z Rotate the entry knob

to move the Y1 cursor.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y2 cursor.

z Rotate the entry knob

to move the Y2 cursor.

z The Y displayed in the softkey area is the voltage

difference between Y1 and Y2.

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Measure the Phase Difference Between Two Signals of

the Same Frequency under X-Y Display Mode.

z Connect a sine wave signal to channel 1 and a sine

wave signal of the same frequency but different phase to

channel 2.

z Press the horizontal MENU key to display the

Horizontal menu.

z Press the X-Y softkey to select the X-Y display mode.

z Center the signal on the display with the vertical position

knob of each channel.

z Use the vertical scale control knob of each channel to

expand the signal for convenient view.

z Press the CURSOR key to display the CURSOR menu.

z Press the Mode softkey to select the Manual mode.

z Press the Source softkey to select CH2.

z Press the Type softkey to select the Voltage type.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y1 cursor.

z Rotate the entry knob

to move the Y1 cursor to the

top of the signal.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y2 cursor.

z Rotate the entry knob

to move the Y2 cursor to the

bottom of the signal.

Application Examples

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149

z The Y displayed in the softkey area is the voltage

difference D (or 2B) between Y1 and Y2.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y1 cursor.

z Rotate the entry knob

to move the Y1 cursor to the

upper intersection of the signal and the Y axis.

z Press the Y1--/ Y2—softkey or press the entry knob

to select the Y2 cursor.

z Rotate the entry knob

to move the Y2 cursor to the

lower intersection of the signal and the Y axis.

z The Y displayed in the softkey area is the voltage

difference C (or 2A) between Y1 and Y2.

z Calculate the phase difference using the formulas

arcsin±=

arcsin=

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4. System Message and General Problems

System Message

Function is not available: The control knob, key, or softkey

is not available under a specific operating condition.

The control is at its limit: This message will be displayed

when the maximum or minimum value is reached by turning

the Entry knob, Vertical Control knobs, Horizontal Control

knobs, or Trigger Level knob.

Total is at its maximun: This message will be displayed

when the maximum value of Total count for PASS/FAIL is

reached.

Record is completed: This message will be displayed when

the number of waveforms (set in the End Frame softkey)

have been recorded.

No external memory: This message will be displayed when

you try to save a file to an external mass storage device

which has not been installed.

Save error: This message will be displayed when a failure to

save a file to the internal or external memory occurs.

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152

Empty storage memory: This message will be displayed

when you try to load a file which does not exist from the

internal memory.

Unrecognized file: This message will be displayed when

you try to load a file which cannot be recognized by the

oscilloscope.

Update failed: This message will be displayed when a

software update has failed.

No record data: This message will be displayed when you

try to save a record file without record data.

Record is failed: This message will be displayed when

waveform record is failed.

Fatory setup is recalled: This message will be displayed

when the default factory configuration is recalled.

No signal is found: This message will be displayed when

you press the AUTO key without any signal connected to

either channel.

Invalid data: This message will be displayed when you try to

save a *.CSV file without any valid CSV data.

Load finished: This message will be displayed when a file

has been successfully loaded from the internal or external

memory.

Save finished: This message will be displayed when a file

has been successfully saved to the internal or external

memory.

System Message and General Problems

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153

Incompatible file: This message will be displayed when the

update software is not compatible with the model type.

Load error: This message will be displayed when you fail to

load a file from the internal or external memory.

Restart to complete updating: This message will be

displayed to let you restart (power cycle) the oscilloscope

when the software update is successfully finished.

USB device is installed: This message will be displayed

when a USB device is connected and recognized by the

oscilloscope.

USB device is removed: This message will be displayed

when a USB device is removed from the oscilloscope.

Print finished: This message will be displayed when the

current waveform is printed successfully.

Print failed: This message will be displayed when the current

waveform is not printed successfully.

USB host error: This message will be displayed when the

USB host control circuit is not working correctly.

Setup finished: This message will be displayed when the

date and time are set successfully.

Setup failed: This message will be displayed when the date

and time are not set successfully.

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154

General Problems

If there is no display on the screen:

z Check that the power cord is connected to the

oscilloscope and to a live power source.

z Check that the power switch is on.

z Check that the display contrast is adjusted properly.

z Contact B+K Precision if there is still no display.

If there is no waveform displayed:

z Check that the oscilloscope probe id properly connected

to the BNC connector and that the probe clips make

good contact with the probe lead wires.

z Check that the probe clips are securely connected to

points in the circuit under test and that the probe ground

clip is connected to the circuit ground.

z Check that the circuit under test is powered on.

z Press the AUTO key again.

If the waveform display is not stable:

z Check that the trigger source channel is actually the

channel to which the signal is connected.

z Check that the proper trigger type is selected. The video

type is only used to trigger on a video signal. The proper

trigger type is essential for a stable display.

System Message and General Problems

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155

z Try using HF Reject or LF Reject to reduce the noise of

the trigger signal.

If the amplitude is not identical with the actual voltage:

z Check that the attenuation factor of the probe

corresponds to the attenuation factor set in the channel

menu.

Specifications

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157

5. Specifications and Characteristics

Characteristics

The characteristics given below are typical performance

values and are not warranted. Characteristics are valid after

a 30 minute warm-up time and within ±5 ℃ of the last

self-calibration temperature.

Vertical system

Scope channels 2 channels plus external trigger input.

Bandwidth

60 MHz: 2534, 2540

100 MHz: 2542

Calculated rise time

(=0.35/bandwidth)

5.83 ns: 2534, 2540

3.50 ns: 2542

Coupling AC, DC, GND

BW Limit 20 MHz selectable

Vertical sensitivity 2mV/div – 5V/div, 1-2-5 sequence

DC Vertical Gain

Accuracy

2 mV/div to 5 mV/div: ±4%

10 mV/div to 5 V/div: ±3%

Specifications

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158

DC Measurement

Accuracy

2 mV/div to 5 mV/div range:

±(4% × reading + 0.1 × V/div + 0.5 mV)

10 mV/div to 5 V/div range:

±(3% × reading + 0.1 × V/div + 1.0 mV)

Position range ±8 divisions from the center of the screen

Attenuation factor ×1, ×10, × 100, × 1000

Channel common

mode rejection

100:1 at 60Hz

20:1 at 10MHz

Lower frequency

limit, AC coupled

5Hz at BNC 1Hz when using a 10X passive probe

Channel to

channel crosstalk

100:1 at 1MHz 100:1 at 10MHz

Input Impedance

1 M ±1% || 19 pF

Maximum input CAT II, 400Vpk

Differential delay

150 ps between two channels with the same

scale and coupling settings

Specifications

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159

Horizontal system

Time base range

2.5 ns/div to 50 s/div (2534)

2 ns/div to 50 s/div (2540, 2542)

Modes Main, Delayed, Roll, and X-Y

Time base accuracy ±0.01%

Input of X-Y mode

Channel 1 is the X-axis input

Channel 2 is the Y-axis input

Bandwidth of X-Y mode

60 MHz: 2534, 2540

100 MHz: 2542

Phase error of X-Y mode ±3°

Measurements

Voltage measurement

Maximum, Minimum, Peak-to-Peak, High, Low,

Amplitude, Average, RMS, Cycle Average,

Cycle RMS, Overshoot, Preshoot

Time measurement

Frequency, Period, +Width, -Width, +Duty,

-Duty, Rise time, Fall time, Delay, Phase, X at

MAX, X at MIN

Math

CH1-CH2, CH1+CH2, CH1×CH2, FFT (2k

points)

Cursors Manual, Automatic and Track

Counter

Built-in 5-digit frequency counter. Count up to

the oscilloscope’s maximum bandwidth.

Specifications

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160

Trigger system

Source CH1, CH2, EXT, EXT/5, AC Line, Alternating.

Modes Auto, Normal, Single

Coupling DC, AC, LF-Reject, HF-Reject

Type Edge, Pulse, Video

Trigger sensitivity,

Edge Trigger Type,

DC coupling

CH1,CH2: 1div from DC to 10MHz

EXT: 100mV from DC to 10MHz

200mV from 10MHz to full Bandwidth

EXT/5: 500mV from DC to full Bandwidth

Trigger sensitivity,

Edge Trigger Type,

AC coupling

Same as DC coupling at 50 Hz and above

Trigger sensitivity,

Edge Trigger Type,

LF REJ

Same as the DC coupling limits for frequencies

above 100kHz, attenuates signals below 8kHz

Trigger sensitivity,

Edge Trigger Type,

HF REJ

Same as the DC coupling limits from DC to 10kHz,

attenuates signals above 150kHz

Trigger sensitivity,

Video Trigger Type

Internal: Pk to Pk amplitude of 2 divisions

EXT: 400 mV

EXT/5: 2V

Signal formates

and Field Rates,

Video Trigger Type

Supports NTSC, PAL, and SECAM broadcast

systems for any field or any line

Trigger level range ±8 divisions from screen center

Specifications

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161

EXT: ±1.6V

EXT/5: ±8V

Holdoff Range 100ns to 1.5s

Trigger Level

Accuracy

Internal: ±0.3 div×volts/div

Input impedance

1M±1%||19pF

Maximum input CAT II, 400V

@1M

SET LEVEL TO 50%

Operates with input signal ≥50 Hz.

Pulse Width

Trigger mode

Trigger when Less than, Greater than, Equal

Positive pulse , Negative pulse

Pulse Width Range 20ns to 10s

Specifications

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162

Storage and IO

Internal memory

10 setups and waveforms can be saved and

recalled internally.

File format

Setup file (*.STP), Waveform file (*.WFM), BMP

file (*.BMP), CSV file (*.CSV). Files can be

saved with real time stamp (date, time)

Standard ports

USB host

USB device

Acquisition system

Max. real-time

sample rate

400 MSa/s: 2534

1 GSa/s: 2540, 2542

Max. equivalent

sample rate

40 GSa/s: 2534

50 GSa/s: 2540, 2542

Memory Depth 4000 points

Vertical resolution 8 bits

Sample mode Normal, Average, Peak Detect

Autoset

Finds and displays all active channels. Sets edge

trigger mode on lowest channel, sets vertical

sensitivity on for both channels and time base to

display one or five periods. Requires minimum voltage

> 10 mVpp, 0.5% duty and minimum frequency

> 50 Hz.

Specifications

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163

Display system

Display 5.7 inch (145cm) diagonal STN LCD.

Resolution 240 vertical by 320 horizontal pixels

Color 256 VGA colours

Brightness Adjustable

Language Multi language user interface

Display area

Menu ON:

8 vertical by 10 horizontal divisions

or 200 vertical by 250 horizontal pixels

Menu OFF:

8 vertical by 12 horizontal divisions

or 200 vertical by 300 horizontal pixels

Display mode Vector, Dots

Interpolation Sinx/x, Linear

Persistence Off, Infinite persistence

Specifications

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164

Power and environmental requirments

Line voltage 99V to 242VAC

Line frequency 47Hz to 440Hz

Power consumption Less than 50VA

Operating temperature

0°C to40°C

Non-operating temperature

-20°C to 55°C

Humidity ≤90% relative humidity

Operating altitude ≤3000m

Non-operating altitude ≤15000m

Physical size and Weight

Instrument height 147 mm

Instrument width 310 mm

Instrument depth 269 mm

Compartment height 57 mm

Compartment width 225 mm

Compartment depth 189 mm

Net weight Approximately 3.6kg

Calibration interval

Recommended calibration interval One year

Specifications

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165

Appendix A: Service and Warranty Information

ServiceInformation



Warranty Service: Please return the product in the original packaging with proof of purchase to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device.



Non-Warranty Service: Return the product in the original packaging to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Customers not on open account must include payment in the form of a money order or credit card. For the most current repair charges please visit www.bkprecision.com

and click on “service/repair”.

Return all merchandise to B&K Precision Corp. with pre-paid shipping. The flat-rate repair charge for Non-Warranty Service does not include return shipping. Return shipping to locations in North American is included for Warranty Service. For overnight shipments and non-North American shipping fees please contact B&K Precision Corp.

B&K Precision Corp. 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com 714-921-9095

Include with the returned instrument your complete return shipping address, contact name, phone number and description of problem.



Specifications

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166

LimitedTwo‐YearWarranty



B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free from defects in workmanship and materials for a period of one year from date of purchase.

B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form of a sales receipt. To obtain warranty coverage in the U.S.A., this product must be registered by completing a warranty registration form on

www.bkprecision.com

within fifteen (15) days of purchase.

Exclusions: This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs. The warranty is void if the serial number is altered, defaced or removed.

B&K Precision Corp. shall not be liable for any consequential damages, including without limitati on damages resulting from loss of use. Some states do not allow limitations of incidental or consequential damages. So the above limitation or exclusion may not apply to you.

This warranty gives you specific rig ht s and you may have other rights, which vary from state-to-state.

B&K Precision Corp. 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com 714-921-9095

Specifications

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167



Specifications

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168



22820SaviRanchParkway

YorbaLinda,CA92887

www.bkprecision.com



Printed in China

BK Precision 2540, 2534, 2542 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual