BK Precision 2540, 2534, 2542 User Manual

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



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

Basic Operation

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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

Basic Operation

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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



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

+ 58 hidden pages

BK Precision 2540, 2534, 2542 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual