BK Precision 2190E User Manual

Model: 2190E

100 MHz Digital Storage
Oscilloscope

USER MANUAL

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Safety Summary

The following safety precautions apply to both operating and maintenance
personnel and must be followed during all phases of operation, service,
and repair of this instrument.

Before applying power to this instrument:

 Read and understand the safety and operational information in

this manual.

 Apply all the listed safety precautions.
 Verify that the voltage selector at the line power cord input is set

to the correct line voltage. Operating the instrument at an
incorrect line voltage will void the warranty.

 Make all connections to the instrument before applying power.
 Do not operate the instrument in ways not specified by this

manual or by B&K Precision.

Failure to comply with these precautions or with warnings elsewhere in
this manual violates the safety standards of design, manufacture, and
intended use of the instrument. B&K Precision assumes no liability for a
customer’s failure to comply with these requirements.

Category rating

The IEC 61010 standard defines safety category ratings that specify the
amount of electrical energy available and the voltage impulses that may
occur on electrical conductors associated with these category ratings. The
category rating is a Roman numeral of I, II, III, or IV. This rating is also
accompanied by a maximum voltage of the circuit to be tested, which
defines the voltage impulses expected and required insulation clearances.
These categories are:

Category I (CAT I): Measurement instruments whose measurement inputs
are not intended to be connected to the mains supply. The voltages in the
environment are typically derived from a limited-energy transformer or a

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battery.

Category II (CAT II): Measurement instruments whose measurement inputs
are meant to be connected to the mains supply at a standard wall outlet or
similar sources. Example measurement environments are portable tools
and household appliances.

Category III (CAT III): Measurement instruments whose measurement
inputs are meant to be connected to the mains installation of a building.
Examples are measurements inside a building's circuit breaker panel or the
wiring of permanently-installed motors.

Category IV (CAT IV): Measurement instruments whose measurement
inputs are meant to be connected to the primary power entering a
building or other outdoor wiring.

Do not use this instrument in an electrical environment with a higher
category rating than what is specified in this manual for this instrument.

You must ensure that each accessory you use with this instrument has a
category rating equal to or higher than the instrument's category rating to
maintain the instrument's category rating. Failure to do so will lower the
category rating of the measuring system.

Electrical Power

This instrument is intended to be powered from a CATEGORY II mains
power environment. The mains power should be 120 V RMS or 240 V RMS.
Use only the power cord supplied with the instrument and ensure it is
appropriate for your country of use.

Ground the Instrument

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To minimize shock hazard, the instrument chassis and cabinet must be
connected to an electrical safety ground. This instrument is grounded
through the ground conductor of the supplied, three-conductor AC line
power cable. The power cable must be plugged into an approved three­conductor electrical outlet. The power jack and mating plug of the power
cable meet IEC safety standards.

Do not alter or defeat the ground connection. Without the safety ground
connection, all accessible conductive parts (including control knobs) may
provide an electric shock. Failure to use a properly-grounded approved
outlet and the recommended three-conductor AC line power cable may
result in injury or death.

Unless otherwise stated, a ground connection on the instrument's front or
rear panel is for a reference of potential only and is not to be used as a
safety ground.

Do not operate in an explosive or flammable atmosphere

Do not operate the instrument in the presence of flammable gases or
vapors, fumes, or finely-divided particulates.

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The instrument is designed to be used in office-type indoor environments.
Do not operate the instrument

 In the presence of noxious, corrosive, or flammable fumes, gases,

vapors, chemicals, or finely-divided particulates.

 In relative humidity conditions outside the instrument's

specifications.

 In environments where there is a danger of any liquid being

spilled on the instrument or where any liquid can condense on
the instrument.

 In air temperatures exceeding the specified operating

temperatures.

 In atmospheric pressures outside the specified altitude limits or

where the surrounding gas is not air.

 In environments with restricted cooling air flow, even if the air

temperatures are within specifications.

 In direct sunlight.

This instrument is intended to be used in an indoor pollution degree 2
environment. The operating temperature range is 0 °C to 40 °C and the
operating humidity is ≤ 85 % relative humidity at 40 °C, with no
condensation allowed. Measurements made by this instrument may be
outside specifications if the instrument is used in non-office-type
environments. Such environments may include rapid temperature or
humidity changes, sunlight, vibration and/or mechanical shocks, acoustic
noise, electrical noise, strong electric fields, or strong magnetic fields.

Do not operate instrument if damaged

If the instrument is damaged, appears to be damaged, or if any liquid,
chemical, or other material gets on or inside the instrument, remove the
instrument's power cord, remove the instrument from service, label it as
not to be operated, and return the instrument to B&K Precision for repair.

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Notify B&K Precision of the nature of any contamination of the instrument.

Clean the instrument only as instructed

Do not clean the instrument, its switches, or its terminals with contact
cleaners, abrasives, lubricants, solvents, acids/bases, or other such
chemicals. Clean the instrument only with a clean dry lint-free cloth or as
instructed in this manual.

Not for critical applications

This instrument is not authorized for use in contact with the human body
or for use as a component in a life-support device or system.

Do not touch live circuits

Instrument covers must not be removed by operating personnel.
Component replacement and internal adjustments must be made by
qualified service-trained maintenance personnel who are aware of the
hazards involved when the instrument's covers and shields are removed.
Under certain conditions, even with the power cord removed, dangerous
voltages may exist when the covers are removed. To avoid injuries, always
disconnect the power cord from the instrument, disconnect all other
connections (for example, test leads, computer interface cables, etc.),
discharge all circuits, and verify there are no hazardous voltages present
on any conductors by measurements with a properly-operating voltage­sensing device before touching any internal parts. Verify the voltage­sensing device is working properly before and after making the
measurements by testing with known-operating voltage sources and test

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for both DC and AC voltages. Do not attempt any service or adjustment
unless another person capable of rendering first aid and resuscitation is
present.
Do not insert any object into an instrument's ventilation openings or other
openings.

Hazardous voltages may be present in unexpected locations in circuitry
being tested when a fault condition in the circuit exists.

Servicing

Do not substitute parts that are not approved by B&K Precision or modify
this instrument. Return the instrument to B&K Precision for service and
repair to ensure that safety and performance features are maintained.

Cooling fans

This instrument contains one or more cooling fans. For continued safe
operation of the instrument, the air inlet and exhaust openings for these
fans must not be blocked nor must accumulated dust or other debris be
allowed to reduce air flow. Maintain at least 25 mm clearance around the
sides of the instrument that contain air inlet and exhaust ports. If mounted
in a rack, position power devices in the rack above the instrument to
minimize instrument heating while rack mounted. Do not continue to
operate the instrument if you cannot verify the fan is operating (note some
fans may have intermittent duty cycles). Do not insert any object into the
fan's inlet or outlet.

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For continued safe use of the instrument

 Do not place heavy objects on the instrument.
 Do not obstruct cooling air flow to the instrument.
 Do not place a hot soldering iron on the instrument.
 Do not pull the instrument with the power cord, connected

probe, or connected test lead.

 Do not move the instrument when a probe is connected to a

circuit being tested.

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Compliance Statements

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

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

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CE Declaration of Conformity

This instrument meets the requirements of 2006/95/EC Low Voltage
Directive and 2004/108/EC Electromagnetic Compatibility Directive with
the following standards.

Low Voltage Directive

- EN61010-1: 2001

- EN61010-031: 2002+A1: 2008

EMC Directive

- EN 61326-1:2006

- EN 61000-3-2: 2006+A2: 2009

- EN 61000-3-3: 2008

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Safety Symbols

Refer to the user manual for warning information to
avoid hazard or personal injury and prevent damage
to instrument.

Electric Shock hazard

Alternating current (AC)

Chassis (earth ground) symbol.

Ground terminal

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

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

Off (Supply). This is the AC mains
connect/disconnect switch on top of the
instrument.

CAUTION indicates a hazardous situation which, if
not avoided, will result in minor or moderate injury

WARNING indicates a hazardous situation which, if
not avoided, could result in death or serious injury

DANGER indicates a hazardous situation which, if
not avoided, will result in death or serious injury.

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Table of Contents

Safety Summary ........................................................................................i

Compliance Statements ........................................................................ viii

Safety Symbols ......................................................................................... x

1 General Information .........................................................................1

1.1 Product Overview ......................................................................... 1

1.2 Package Contents ......................................................................... 1

1.3 Front Panel ................................................................................... 2

Front Panel Description ........................................................................ 2

1.4 Back Panel .................................................................................... 3

Back Panel Description ......................................................................... 4

1.5 Display Information ...................................................................... 4

User Interface Description ................................................................... 5

2 Getting Started .................................................................................6

2.1 Input Power Requirements .......................................................... 6

Input Power .......................................................................................... 6

2.2 Preliminary Check ......................................................................... 6

Verify AC Input Voltage ........................................................................ 7

Connect Power ..................................................................................... 7

Self-Test ................................................................................................ 7

Self Cal .................................................................................................. 7

Check Model and Firmware Version .................................................... 8

Function Check ..................................................................................... 8

Probe Safety ....................................................................................... 10

Probe Attenuation .............................................................................. 11

Probe Compensation .......................................................................... 11

3 Functions and Operating Descriptions ............................................ 13

3.1 Menu and Control Button .......................................................... 14

3.2 Connectors ................................................................................. 16

3.3 Auto Setup .................................................................................. 17

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3.4 Default Setup .............................................................................. 19

3.5 Universal Knob............................................................................ 23

3.6 Vertical System ........................................................................... 23

Using Vertical Position Knob and Volts/div Knob ............................... 24

3.7 Channel Function Menu ............................................................. 25

Setting up Channels ............................................................................ 28

3.8 Math Functions ........................................................................... 34

FFT Spectrum Analyzer ....................................................................... 36

3.9 Using REF .................................................................................... 43

3.10 Horizontal System....................................................................... 45

Horizontal Control Knob ..................................................................... 45

Window Zone ..................................................................................... 46

3.11 Trigger System ............................................................................ 47

Signal Source ...................................................................................... 48

Trigger Type ........................................................................................ 49

Coupling .............................................................................................. 67

Position ............................................................................................... 67

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

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

3.12 Signal Acquisition System ........................................................... 70

3.13 Display System ............................................................................ 75

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

3.14 Measure System ......................................................................... 80

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

Cursor Measurement ......................................................................... 80

3.15 Storage System ........................................................................... 94

Recalling Files ..................................................................................... 96

Creating Folders and Files .................................................................. 96

Save/Recall Setup ............................................................................... 97

Save/Recall Waveform ..................................................................... 102

3.16 Utility System............................................................................ 109

System Status ................................................................................... 113

Language .......................................................................................... 114

Self Calibration ................................................................................. 115

Self Test ............................................................................................ 116

Update Firmware.............................................................................. 119

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Pass/Fail ............................................................................................ 120

Waveform Record ............................................................................ 125

Recorder (Scan Mode Only) ............................................................. 129

Help Menu ........................................................................................ 134

Education Mode ............................................................................... 134

4 Application Examples ................................................................... 135

4.1 Taking Simple Measurements .................................................. 135

4.2 Taking Cursor Measurements................................................... 136

4.3 Capturing a Single-Shot Signal .................................................. 138

4.4 Analyzing Signal Details ............................................................ 139

4.5 Triggering on a Video Signal ..................................................... 140

4.6 Application of X-Y Function ...................................................... 141

4.7 Analyzing a Differential Communication Signal........................ 143

5 Remote Control ............................................................................ 144

6 Message Prompts and Troubleshooting ........................................ 146

6.1 Message Prompts ..................................................................... 146

6.2 Troubleshooting ....................................................................... 147

7 Specifications ............................................................................... 149

8 Calibration .................................................................................... 153

SERVICE INFORMATION ....................................................................... 154

LIMITED ONE-YEAR WARRANTY ........................................................... 155

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1 General Information

1.1 Product Overview

The B&K Precision 2190E digital storage oscilloscope (DSO) is a portable
benchtop instrument used for making measurements of signals and
waveforms. The oscilloscope’s bandwidth is capable of capturing up to 100
MHz signals with a real time sampling rate of up to 1 GSa/s. With up to 40k
points of deep memory, more details of a signal can be captured and
displayed on a large color LCD display for analysis.

Features:

 2 channels with bandwidth up to 100 MHz
 Single channel real-time sampling rate of up to 1 GSa/s
 Up to 40k points of memory depth
 7” Color TFT LCD display
 Trigger types: Edge, Pulse, Video, Slope, and Alternative
 Digital filter and waveform recorder functions
 Automatic measurement of 32 parameters (Voltage and Time)
 Standard USB host, USBTMC device, and LAN ports

1.2 Package Contents

Please inspect the instrument mechanically and electrically upon receiving
it. Unpack all items from the shipping carton, and check for any obvious
signs of physical damage that may have occurred during transportation.
Report any damage to the shipping agent immediately. Save the original
packing carton for possible future reshipment. Every instrument is shipped
with the following contents:

 1 x Quick Start guide (printed)
 1 x AC power cord
 1 x USB type A to Type B cable
 2 x 1:1/10:1 Passive Oscilloscope Probes

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Front USB (Type A) Connector

Menu Function Keys, Menu On/Off, Print Key

Input Channels (1 MΩ BNC)

Probe Compensator (1 kHz and Ground)

1 2 3 4 5

10

1

2

3

4

Verify that all items above are included in the shipping container. If
anything is missing, please contact B&K Precision.

1.3 Front Panel

It is important for you to familiarize yourself with the DSO’s front panel
before operating the instrument. Below is a brief introduction of the front
panel function operation.

Figure 1.1 – Front Panel

Front Panel Description

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Horizontal Controls (Time Base)

Trigger Controls

Auto Setup Button

Menu and Measurement Buttons

Universal Knob

Vertical Controls

1 2 3

5

6

4

6

10

9 5 7

8

1.4 Back Panel

The following images show back and side panel connection locations.

Figure 1.2 – Back Panel

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Back Panel Description

Security Lock Receptacle

LAN Interface

Pass/Fail Output

Rear USB (Type B) Device Connector

Power Input Connector

AC Power Switch

1

2

3 4 5

6

1.5 Display Information

Figure 1.3 – Display Screen

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User Interface Description

Trigger Status

USB Host Port Connection Indicator

Waveform Display Preview

Horizontal Trigger Position Marker

LAN Port Connection Indicator

Menu

Trigger Source, Type, and Level Indicator

Frequency Counter

Horizontal Delay Position

Horizontal Time Base Setting

Channel Source, Coupling Type, Volts/Division, BW Limit
Indicator

Vertical Display Markers (Ground Reference)

Trigger Level Display Marker

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1

2

3 4 5 6 7

8

9

10

11

12

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2 Getting Started

The included AC power cord is safety certified for this
instrument operating in rated range. To change a cable or add
an extension cable, be sure that it can meet the required
power ratings for this instrument. Any misuse with wrong or
unsafe cables will void the warranty.

Before connecting and powering up the instrument, please review and go
through the instructions in this chapter.

2.1 Input Power Requirements

Input Power

The supply has a universal AC input that accepts line voltage and
frequency input within:

100 – 240 V (+/- 10%), 50/60 Hz (+/- 5%)

100 – 127 V, 45 – 440 Hz

Before connecting to an AC outlet or external power source, be sure that
the power switch is in the OFF position and verify that the AC power cord,
including the extension line, is compatible with the rated voltage/current
and that there is sufficient circuit capacity for the power supply. Once
verified, connect the cable firmly.

2.2 Preliminary Check

Complete the following steps to verify that the oscilloscope is ready for
use.

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Verify AC Input Voltage

Verify and check to make sure proper AC voltages are available to
power the instrument. The AC voltage range must meet the
acceptable specification as explained in section 2.1.

Connect Power

Connect AC power cord to the AC receptacle in the rear panel and
press the power switch to the ON position to turn ON the
instrument. The instrument will have a boot screen while
loading, after which the main screen will be displayed.

Self-Test

The instrument has 3 self-test options to test the screen, keys,
and the LED back lights of the function, menu, and channel keys
as shown below.

Figure 2.1 – Self Test Menu

To perform the self-test, please refer to the Self Test section for
further instructions.

Self-Cal

This option runs an internal self-calibration procedure that will

check and adjust the instrument. To perform the self-calibration,
please refer to the Self Calibration section for further
instructions.

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Check Model and Firmware Version

The model and firmware version can be verified from within the menu
system.

Press Utility and select System Status option. The software/firmware
version, hardware version, model, and serial number will be displayed.
Press the Single key to exit.

Function Check

Follow the steps below to do a quick check of the oscilloscope’s
functionality.

1. Power on the oscilloscope. Press “DEFAULT SETUP” to show the

result of the self-check. The probe default attenuation is 1X.

Figure 2.2 – Scope Layout

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

channel 1 on the oscilloscope. To do this, align the slot in the
probe connector with the key on the CH 1 BNC, push to connect,
and twist to the right to lock the probe in place. Connect the
probe tip and reference lead to the PROBE COMP connectors.

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Figure 2.3 – Probe Compensation

PROBE
COMP

CH1

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

peak square wave in couple seconds.

Figure 2.4 – 3 Vpp Square Wave

4. Press “CH1” two times to turn off channel 1, Press“CH2” to

change screen into channel 2, reset the channel 2 as step 2 and
step 3.

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Probe Safety

SHOCK HAZARD

To avoid electric shock when using the probe, keep fingers
behind the guard on the probe body.

To avoid electric shock while using the probe, do not touch
metallic portions of the probe head while it is connected to a
voltage source. Connect the probe to the oscilloscope and
connect the ground terminal to ground before you take any
measurements.

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

Figure 2.5 – Oscilloscope Probe

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

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Probe Attenuation

NOTE: The default setting for the Probe option is 1X.

NOTE: When the attenuation switch is set to 1X, the probe limits

the bandwidth of the oscilloscope to 6 MHz (according to Probe
spec). To use the full bandwidth of the oscilloscope, be sure to set

the switch to 10X

Probes are available with various attenuation factors which affect the
vertical scale of the signal. The Probe Check function verifies that the
Probe attenuation option matches the attenuation of the probe.

You can push a vertical menu button (such as the CH 1 MENU button), and
select the Probe option that matches the attenuation factor of your probe.

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

Probe Compensation

As an alternative method to Probe Check, you can manually perform this
adjustment to match your probe to the input channel.

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Figure 2.6 – Probe Compensation Setup

AUTO
BUTTON

PROBE
COMP

CH1

Undercompensated

Correctly Compensated

Overcompensated

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

so by pressing CH1 button and selecting “Probe” from menu.
Select 10X. Set the switch to 10X on the probe and connect the
probe to channel 1 on the oscilloscope. If you use the probe
hook-tip, ensure a proper connection by firmly inserting the tip
onto the probe.

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

reference lead to the PROBE COMP Ground connector. Display
the channel and then push the “AUTO” button.

3. Check the shape of the displayed waveform.

Figure 2.7 – Compensation Illustration

4. If necessary, adjust your probe’s compensation trimmer pot.

Repeat as necessary.

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3 Functions and Operating

Descriptions

To use your oscilloscope effectively, you need to learn about the following
oscilloscope functions:

• Menu and control button

• Connector

• Auto Setup

• Default Setup

• Universal knob

• Vertical System

• Channel Function Menu

• Math Functions

• Using REF

• Horizontal System

• Trigger System

• Acquiring signals System

• Display System

• Measuring waveforms System

• Utility System

• Storage System

• Online Help function

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3.1 Menu and Control Button

Figure 3.1 – Control Buttons

 Channel buttons (CH1, CH2): Press a channel button to turn

that channel ON or OFF and open the channel menu for that
channel. You can use the channel menu to set up a channel.
When the channel is on, the channel button is lit.

 MATH: Press to display the Math menu. You can use the

MATH menu to use the oscilloscope’s Math functions.

 REF: Press to display the Ref Wave menu. You can use this

menu to save and recall four or two reference waveforms to
and from internal memory.

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 HORI MENU: Press to display the Horizontal menu. You can

use the Horizontal menu to display the waveform and zoom
in a segment of a waveform.

 TRIG MENU: Press to display the Trigger menu. You can use

the Trigger menu to set the trigger type (Edge. Pulse, Video,
Slope, Alternative) and trigger settings.

 SET TO 50%: Press to stabilize a waveform quickly. The

oscilloscope can set the trigger level to be halfway between
the minimum and maximum voltage level automatically. This
is useful when you connect a signal to the EXT TRIG
connector and set the trigger source to Ext or Ext/5.

 FORCE: Use the FORCE button to complete the current

waveform acquisition whether the oscilloscope detects a
trigger or not. This is useful for Single acquisitions and
Normal trigger mode.

 SAVE/RECALL: Press to display the Save/Recall menu. You

can use the Save/Recall menu to save and recall up to 20
oscilloscope setups and 10 waveforms to/from internal
memory or a USB memory device (limited by memory
capacity of the USB flash drive). You can also use it to recall
the default factory settings, to save waveform data as a
comma-delimited file (.CSV), and to save the displayed
waveform image.

 ACQUIRE: Press to display Acquire menu. You can use the

Acquire menu to set the acquisition Sampling Mode
(Sampling, Peak Detect, and Average).

 MEASURE: Press to display a menu of measurement

parameters.

 CURSORS: Display the Cursor Menu. Vertical Position

controls adjust cursor position while displaying the Cursor
Menu and the cursors are activated. Cursors remain

displayed (unless the “Type” option is set to “Off”) after

leaving the Cursor Menu but are not adjustable.

 DISPLAY: Press to open the Display menu. You can use the

Display menu to set grid and waveform display styles, and
persistence.

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

Utility menu to configure oscilloscope features, such as

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sound, language, counter, etc. You can also view system
status and update software.

 DEFAULT SETUP: Press to reset the oscilloscope’s settings to

the default factory configuration.

 HELP: Enter the online help system.
 AUTO: Automatically sets the oscilloscope controls to

produce a usable display of the input signals.

 RUN/STOP: Continuously acquires waveforms or stops the

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

 SINGLE: Acquire a single waveform and then stops waveform

acquisition.

3.2 Connectors

Figure 3.2 – Connectors

 Channel Connector (CH1, CH2): Input connectors for waveform

display.

 EXT TRIG: Input connector for an external trigger source. Use the

Trigger Menu to select the “Ext” or “Ext/5” trigger source.

 Probe Compensation: 1 kHz voltage probe compensation output

and ground. Use to electrically match the probe to the
oscilloscope input circuit.

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