B&K Precision 4040B User Manual

Model: 4014B, 4040B

DDS Function Generator

USER MANUAL

Safety Summary

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

If this device is damaged or something is missing,

contact the place of purchase immediately.

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

GROUND THE INSTRUMENT

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

DO NOT OPERATE IN AN EXPLOSIVE

ATMOSPHERE

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

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance

WARNING:

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

personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt any internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

DO NOT SUBSTITUTE PARTS OR MODIFY THE

INSTRUMENT

Do not install substitute parts or perform any unauthorized modifications to this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, such as the

following examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements.

A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.

A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of part or all of the product.

WARNING:

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

CAUTION:

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

CAUTION:

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

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.

Compliance Statements

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

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

Chassis (earth ground) symbol.

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.

On (Supply). This is the AC mains connect/disconnect switch at the back of the instrument.

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

Safety Symbols

CE Declaration of Conformity

The function generators meet the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnet Compatibility Directive with the following standards.

Low Voltage Directive

- EN61010-1:2010

Safety requirements for electrical equipment for measurement, control, and laboratory use-Part 1

EMC Directive

- EN61326-1:2006

- EN61000-3-2 (2006+A2:2009)

- EN61000-3-3 (2008)

- EN61000-4-2 (2009)/-3

(2006+A2:2010)/-4 (2004+A1:2010)/-5 (2006)/-6 (2009)/-11 (2004)

1 INTRODUCTION .................... 11

1.1 Introduction ...........................................11

1.2 Description ............................................11

1.3 Specifications........................................11

2 INSTALLATION ..................... 16

2.1 Introduction ...........................................16

2.2 Package Contents ................................16

2.4 Instrument Mounting .............................17

2.5 Power Requirements ............................17

2.6 Fuse Replacement ................................18

2.7 Grounding Requirements ......................18

2.8 Signal Connections ...............................19

3 OPERATING INSTRUCTIONS 20

3.1 General Description ..............................20

3.2 Display Window ....................................21

3.3 Front Panel Controls .............................22

3.4 Connectors ...........................................22

3.5 Output Connections ..............................23

3.6 MENU Keys ..........................................24

3.6.1 WAVEFORM Keys........................ 24

3.6.2 MODE Key .................................... 26

3.6.3 UTILITY Key ................................. 29

3.6.4 SWEEP Key .................................. 31

3.6.5 MODULATION Key ....................... 33

3.7 ON Key ................................ ................. 36

3.8 Cursor Keys .......................................... 36

3.9 Rotary Input Knob ................................. 37

3.10 Power-On Settings .............................. 37

3.11 Memory .............................................. 38

3.12 Displaying Errors ................................ 38

3.13 Quick Start .......................................... 39

3.13.1 Selecting a Standard Waveform . 39

3.13.2 Setting the Output ...................... 40

3.13.3 Using Voltage Offset .................. 40

3.13.4 Storing and Recalling a Waveform

Generator Setup ....................................... 40

4 PROGRAMMING ................... 42

4.1 Overview ............................................. 42

4.1.1 Connecting to USB (Virtual COM)

Interface ................................................... 42

4.1.2 USB (Virtual COM) Settings .......... 49

4.2 Device States ...................................... 49

4.2.1 Local State (LOCS) ....................... 49

4.2.2 Remote State (REMS) ................... 49

4.3 Message Exchange Protocol ............... 50

4.3.1 The Input Buffer ............................ 50

4.3.2 The Output Queue ........................ 50

4.3.3 Response Messages .................... 51

4.4 Instrument Identification .......................51

4.5 Instrument Reset .................................51

4.6 Command Syntax ...............................51

4.6.1 General Command Structure ........ 51

4.7 Status Reporting ..................................56

4.7.1 The Error Queue ........................... 56

4.7.2 Error Codes .................................. 57

4.8 COMMON COMMANDS ......................61

4.8.1 System Data Commands .............. 61

4.8.2 Internal Operation Commands ...... 62

4.8.3 Device Trigger Commands ........... 62

4.8.4 Stored Settings Commands .......... 63

4.9 INSTRUMENT CONTROL COMMANDS

....................................................................64

4.9.1 Default Subsystem........................ 65

1 Introduction

Model

4014B

4040B

Frequency Characteristics

Sine

0.01 Hz – 12 MHz

0.01 Hz – 20 MHz

Square

0.01 Hz – 12 MHz

0.01 Hz – 20 MHz

Triangle

0.01 Hz – 1 MHz

0.01 Hz – 2 MHz

Accuracy

0.01% + 0.006 Hz

1.1 Introduction

This manual contains information required to operate the B&K Precision model 4014B and 4040B DDS Function Generators. This section covers the instrument’s general description, specifications and characteristics.

1.2 Description

The 4014B and 4040B are versatile high performance function generators. Implemented using a DDS (direct digital synthesis) architecture, these instruments generate stable and precise sine, square, and triangle waveforms. Both models also provide linear and logarithmic sweep for users needing sweep capability. An

auxiliary TTL output at the generator’s frequency is

available to synchronize external devices. The instrument can also be remotely operated via the USB interface and is SCPI compatible.

1.3 Specifications

Resolution

*6 digits or 10 mHz

Output Characteristics

Amplitude Range

10 mV

p-p

to 10 V

p-p

(into 50 Ω)

20 mV

p-p

to 20 V

p-p

(open circuit)

Resolution

3 digits (1000 counts)

Amplitude Accuracy

± 2 % ± 20 mV of programmed output from 1.01 V – 10 V

Flatness

± 0.5 dB to 1 MHz ± 1 dB to 12 MHz

± 0.5 dB to 1 MHz ± 1 dB to 20 MHz

Offset Range

- 4.99 V to 4.99 V (into 50 Ω)

Offset Resolution

10 mV, 3 digits Offset Accuracy

± 2 % ± 10 mV (into 50 Ω)

Output Impedance

50 Ω ± 2 %

Output Protection

Protected against short circuit or accidental voltage practically available in electronic laboratories, applied to the main output connector

Waveform Characteristics

**Harmonic Distortion

0 – 1 MHz, < -60 dBc 1 MHz – 5 MHz, < -50 dBc 5 MHz – 12 MHz , < -45 dBc

0 – 1 MHz, < -60 dBc 1 MHz – 5 MHz, < -50 dBc 5 MHz – 12 MHz , < -45 dBc 12 MHz – 20 MHz, < -50 dBc

Square Rise/Fall Time

< 20 ns (10% to 90% at full amplitude into 50 Ω)

Variable Duty Cycle

Square: 20% to 80 %, up to 2 MHz Triangle: 1 % to 99 % in 1% steps, up to 200 kHz

Symmetry Accuracy at 50%

± 1 %

Operating Modes

Continuous

Output continuous at programmed parameters

Triggered

Output quiescent until triggered by an internal or external trigger, at which time one waveform

cycle is generated to programmed parameters. Frequency of waveform cycle is limited to 1 MHz.

Gate

Same as triggered mode, except waveform is executed for the duration of the gate signal. The last cycle started is completed.

Burst

2 – 65535 cycles

Trigger Source

Trigger source may be internal, external, or manual. Internal trigger rate 0.1 Hz – 1 MHz (1μs – 10 s)

Modulation Characteristics

Amplitude Modulation

Internal

0.1 Hz – 20 kHz sine only

0.1 Hz – 20 kHz sine, square, or triangle waveform

External

5 V

p-p

for 100% modulation, 10 kΩ input

impedance

Frequency Modulation

Internal

0.1 Hz – 20 kHz sine only

0.1 Hz – 20 kHz sine, square, or triangle waveform

External

5 V

p-p

for 100% modulation, 10 kΩ input

impedance

Sweep Characteristics

Sweep Shape

Linear or Logarithmic, up or down

Sweep Time

10 ms to 100 s

Input and Output

Trigger IN

TTL compatible Maximum rate 1 MHz Minimum width > 50 ns Input impedance 1 kΩ

Sync OUT

TTL pulse at programmed frequency 50 Ω source impedance

Modulation IN

5 V

p-p

for 100% modulation

10 kΩ input impedance

DC to > 20 kHz minimum bandwidth

Counter Characteristics

Range

50 Hz to 25 MHz

Resolution

Auto ranging, up to 8 digits

Accuracy

± 0.02 % ± 2 digits

Sensitivity

100 mV

rms

typical

General

Memory Storage

Store up to 10 instrument settings

Store up to 20 instrument settings

Power Requirements

100 V – 240 V AC ± 10% (90 V – 264 VAC)

Max. Power Consumption

< 25 VA

< 30 VA

Operating Temperature

0 °C – 50 °C

Storage Temperature

-10 °C – 70 °C Humidity

95% RH, 0 °C – 30 °C

Dimensions

213 mm x 88 mm x 210 mm (WxHxD)

Weight

Approx. 2.5 kg

Safety Standards

EN55011 for radiated and conducted emissions EN55082 EN61010

*For square wave, resolution is up to 4 digits when frequency is > 20 kHz. **For sine wave at 5 V

into 50 Ω.

p-p

Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C. Specifications are subject to change without notice.

To ensure the most current version of this manual, please download the latest version here:

http://www.bkprecision.com/search/4040B

For current up-to-date product information, please visit

www.bkprecision.com

2 Installation

2.1 Introduction

This section contains installation information, power requirements, initial inspection and signal connections for the 4014B and 4040B signal generators.

2.2 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 generator is shipped with the following contents:

 4014B or 4040B DDS function generator  AC Power Cord  USB (type A to B) interface cable  Manual contained on CD  Certificate of Calibration

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

2.4 Instrument Mounting

The 4014B and 4040B Function Generators are intended for bench use. The instrument includes a front feet tilt mechanism for optimum panel viewing angle. The instrument does not require special cooling when operated within conventional temperature limits. It may be installed in a closed rack or test station if proper air flow can assure removing about 15 W of power dissipation.

2.5 Power Requirements

The function generators can be operated from any source of 90V to 264V AC, frequency from 48Hz to 66Hz. The maximum power consumption is 25 VA(4014B)/30VA(4040B). Use a slow blow fuse of 1A, UL/CSA approved as indicated on the rear panel of the instrument.

The instrument power fuse is located in the AC input plug. To access the fuse, first disconnect the power cord and then remove the fuse box.

Fuse box slit

Fuse box

Check/Remove Fuse

2.6 Fuse Replacement

There is a 1A, 250V rated slow blow fuse at the AC input. Should the fuse ever get blown, follow the steps below to replace:

1. Locate the fuse box next to the AC input connector in the rear panel.

2. With a small flat blade screwdriver, insert into the fuse box slit to pull and slide out the fuse box as indicated below.

3. Check and replace fuse if necessary.

2.7 Grounding Requirements

For the safety of operating personnel, the instrument must be grounded. The central pin on the AC plug grounds the instrument when properly connected to the ground wire and plugged into proper receptacle.

WARNING

TO AVOID PERSONAL INJURY DUE TO SHOCK, THE THIRD WIRE EARTH GROUND MUST BE CONTINUOUS TO THE POWER OUTLET. BEFORE CONNECTION TO THE POWER OUTLET, EXAMINE ALL CABLES AND CONNECTIONS BETWEEN THE UNIT AND THE FACILITY POWER FOR A CONTINUOUS EARTH GROUND PATH.

THE POWER CABLE MUST MEET IEC SAFETY STANDARDS.

2.8 Signal Connections

Use RG58U 50Ω or equivalent coaxial cables for all input and output signals to and from the instrument.

Power Button

Power ON/OFF unit

LCD Display

Displays all instrument data and settings

Function Keys

F1 – F4 function keys to select menu options

1 2 3

5 6 7

3 Operating Instructions

3.1 General Description

This section describes the displays, controls and connectors of the function generator. All controls for the instrument local operation are located on the front panel

Waveform Buttons

Select Sine, Ramp/Triangle, Square waveform shape

Numeric Keypad

Enter numeric values for parameters

Units Keys

Select unit of frequency, time, or voltage

Rotary Knob

Increment/decrement numerical values or menu selections

Cursor Keys

Move cursor (when visible) left or right

Enter Key

Confirm parameter entries

Output ON/OFF

Enable/Disable Output

Output BNC

Main output

SYNC OUT BNC

Sync output

UTIL Button

Utility menu

MODUL Button

Selects Modulation menu

SWEEP Button

Selects Sweep function menu

MODE Button

Selects Trigger mode menu

3.2 Display Window

The function generator has a color LCD display that can display up to 400 x 240 dots. When powering on the unit, sine waveform is selected and current settings will appear in the display. The bottom of the display shows a menu (selectable with function keys) that corresponds to the function, parameter,

or mode display selected.

3.3 Front Panel Controls

The front-panel controls select, display, and change parameter,

function, and mode settings. Use the numerical keypad, rotary input knob and the cursor movement keys to enter data into the waveform generator.

To change a setting:

1. Press the key that leads to the item to change.

2. Move cursor using cursor keys to the appropriate position in

the numeric field (if applicable).

3. Use the rotary input or the numerical keyboard to change the

value of the displayed item. Changes take effect immediately.

3.4 Connectors

The function generator has two BNC connectors on the front panel where you can connect coaxial cables. These coaxial cables serve as carrier lines for output signals delivered from the function generator.

Output Connector

Use this connector to transfer the main output signal from the function generator.

Trig In Connector

Use this connector to apply an external trigger or gate signal,

depending on the waveform generator setting, to the generator.

When the built-in frequency counter is enabled, this connector

becomes an input for the counter.

Sync Out Connector

Use this connector to output a positive TTL sync pulse generated at each waveform cycle.

Modulation In Connector

5V p-p signal for 100% modulation, 10Kohms input impedance

with DC - >20 KHz bandwidth.

3.5 Output Connections

The waveform generator output circuits operate as a 50 Ω voltage source working into a 50 Ω load. At higher frequencies, non terminated or improperly terminated output causes aberrations on the output waveform. In addition, loads less than 50 Ω reduce the waveform amplitude, while loads more than 50 Ω increase waveform amplitude. Excessive distortion or aberrations caused by improper termination are less noticeable at lower frequencies, especially with sine and triangle waveforms. To ensure waveform integrity, follow these precautions:

1. Use good quality 50 Ω coaxial cable and connectors.

2. Make all connections tight and as short as possible.

3. Use good quality attenuators if it is necessary to reduce waveform amplitudes applied to sensitive circuits.

4. Use termination or impedance-matching devices to avoid reflections.

5. Ensure that attenuators and terminations have adequate power handling capabilities.

If there is a DC voltage across the output load, use a coupling capacitor in series with the load. The time constant of the coupling capacitor and load must be long enough to maintain pulse flatness.

Impedance Matching If the waveform generator is driving a high impedance,

such as a 1 MΩ input impedance (paralleled by a stated capacitance) of an oscilloscope vertical input, connect the transmission line to a 50 Ω attenuator, a 50 Ω termination and to the oscilloscope input. The attenuator isolates the input capacitance of the device and terminates the waveform generator properly.

3.6 MENU Keys

These keys select the main menus for displaying or changing a parameter, function, or mode.

3.6.1 WAVEFORM Keys

These keys select the waveform output and display the waveform parameter menu (frequency, amplitude and offset).

Sine Menu

F1: Frequency – Selects and displays the frequency. Change the frequency setting using the cursor keys, rotary knob, or numerical keys.

F2: Amplitude – Selects and displays the amplitude. Change the amplitude setting using the cursor keys, rotary knob, or numerical keys.

F3: Offset – Selects and displays the offset parameter. Change the offset by using the cursor keys, rotary knob, or numerical keys. If a certain setting cannot be produced, the waveform generator will display a “Setting Conflict” message.

Amplitude and offset settings interact and are bound by hardware restrictions. To obtain the desired waveform, the amplitude and offset must satisfy the following formula:

(Vp-p)/2 + |offset| <= 5 volts

F4: Symmetry – When the Square or Triangle waveforms are selected, the SYMMETRY (duty cycle) parameter is available. Change the symmetry (Triangle) or duty cycle (Square) by using the cursor keys, rotary knob, or numerical keys. If a certain setting cannot be produced, the waveform generator will display a warning message.

Square Menu

3.6.2 MODE Key

Selects the output mode: CONT (Continuous), TRIG (Triggered), GATE (Gated), and BRST (Burst).

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B&K Precision 4040B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual