Model: 4014B, 4040B
DDS Function
Generator
USER MANUAL
2
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
3
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.
4
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.
5
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)
6
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
7
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
8
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
9
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
10
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
11
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
12
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
13
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
14
For current up-to-date product information, please visit
www.bkprecision.com
15
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.
16
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.
17
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.
18
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.
19
1
Power Button
Power ON/OFF unit
2
LCD Display
Displays all instrument data
and settings
3
Function Keys
F1 – F4 function keys to select
menu options
1 2 3
4
5 6 7
9
8
10
11
12
13
14
15
16
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
20
4
Waveform
Buttons
Select Sine, Ramp/Triangle,
Square waveform shape
5
Numeric
Keypad
Enter numeric values for
parameters
6
Units Keys
Select unit of frequency, time,
or voltage
7
Rotary Knob
Increment/decrement numerical
values or menu selections
8
Cursor Keys
Move cursor (when visible) left
or right
9
Enter Key
Confirm parameter entries
10
Output
ON/OFF
Enable/Disable Output
11
Output BNC
Main output
12
SYNC OUT
BNC
Sync output
13
UTIL Button
Utility menu
14
MODUL
Button
Selects Modulation menu
15
SWEEP
Button
Selects Sweep function menu
16
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,
21
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.
22
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.
23
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).
24
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:
25
(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).
26
To select the output mode, press MODE, then press the
function key that corresponds to the desired Mode menu
option, as shown:
Mode Menu
F1: Continuous – Selects continuous output.
F2: Triggered – Triggers one output cycle of the
selected waveform for each trigger event.
F3: Gated – Triggers output cycles as long as the trigger
source asserts the gate signal.
F4: Burst – Triggers ‘N’ number of output cycles for each
trigger event, where N ranges from 2 to 65,535.
Note: Gate and Burst modes are not available on
4014B.
27
After selecting the TRIGGERED, GATED, or BURST
menu, the trigger source menu is available:
Trigger Menu
F1: Manual – Selects manual as the trigger source. To
trigger the waveform generator,
press this MANUAL trigger button again.
F2: Internal – Selects the internal trigger generator as
the trigger source. Change the
internal trigger rate displayed with the rotary input knob.
F3: External – Selects the external trigger signal as the
trigger source. The trigger source
is supplied through the TRIG IN connector.
In BURST MODE, the F4 key displays N-Burst,
representing the number of burst cycles to output with
28
each trigger. The N value can be changed from 2 to
65,535.
Burst Menu
3.6.3 UTILITY Key
29
Utility Menu
F1: Recall – Recalls a previously stored front-panel
setup from the selected buffer. Change the buffer number
by using the rotary input knob. Valid storage buffer
numbers are from:
4014B: 1 to 9
4040B: 1 to 19
Buffer 0 is the factory default setup.
F2: Store – Stores the current front-panel setup to the
specified storage buffer. Change the buffer number by
using the data keys or the rotary input knob. Valid
storage buffer numbers range from:
4014B: 1 to 9
4040B: 1 to 19
F3: Out-On Def – Selects the OUTPUT state on power-
up. Select ON to enable or OFF to disable the output on
power-up.
F4: COUNTER – Enables the built-in frequency counter.
The frequency of the signal connected to the TRIG IN
connector will be displayed. The counter is auto ranging
with up to 8 digits of resolution.
30
Counter Screen
Press F1 - Off to turn off the counter.
3.6.4 SWEEP Key
Selects the Sweep Mode and allows entering of sweep
parameters: Sweep Start, Sweep Stop, and Sweep Rate.
To select the sweep mode, press SWEEP, then press the
function key that corresponds to the desired Sweep
menu option, as shown:
31
Sweep Menu
F1: Off – Disables the sweep function.
F2: Linear – Selects the Linear sweep shape.
F3: Logarithmic – Selects the Logarithmic sweep shape.
F4: Set – Defines the Sweep Start and Stop frequencies.
32
Set Sweep Menu
3.6.5 MODULATION Key
Selects the AM or FM Modulation mode. To select the
output mode, press MODUL key, then press the function
key that corresponds to the desired menu option, as
shown:
33
Modulation Menu
Press F2 to select AM menu:
AM Menu
34
F1: % - Defines the modulation depth (from 0 to 100%)
F2: Frequency - Selects the modulation frequency, from
0.1 Hz to 20.00 kHz.
F3: Shape - Selects the modulating waveform between
Sine, Square, or Triangle. For model 4014B, only Sine is
available.
F4: External - Selects and enables the external
modulation by an external signal applied to the
Modulation In connector in the rear panel.
Press F3 to select FM menu:
FM Menu
35
F1: Deviation - Defines the FM deviation frequency.
F2: Frequency - Selects the modulation frequency, from
0.1 Hz to 20.00 kHz.
F3: Shape - Selects the shape of the modulating
waveform between Sine, Triangle, or Square. For model
4014B, only Sine is available.
F4: External - Selects and enables the external
modulation by an external signal applied to the
Modulation In connector in the rear panel.
3.7 ON Key
Use this key to control the main output signal. When the
output is active, the ON key will be lit. By default, this will
be ON (enabled) from a power-up. This can be changed
by changing the Out-On Def settings from the UTILITY
menu.
3.8 Cursor Keys
Use these keys to move the cursor (when visible) either
left or right. They are used in conjunction with the rotary
input knob to set the step size of the rotary input knob.
36
3.9 Rotary Input Knob
Use this knob to increase and decrease numeric values.
The cursor indicates the low-order position of the
displayed value which changes when you rotate the knob
(for straight numeric entries only). For other types of
data, the whole value changes when you rotate the knob.
3.10 Power-On Settings
At power-on, the waveform generator performs a
diagnostic self-test procedure to check itself for errors. If
an error is found, an error code and text will appear in the
display window. Other error codes appear when you
enter an invalid front-panel setting. For more information
on error codes, see the Error Indication section.
When the waveform generator finishes the diagnostic
self-test routine, it enters the local state (LOGS) and
assumes power-on default settings. Table 1 lists the
factory default settings or selected after RECALL 0.
37
Key Function
Value
Description
Function
Sine
Output Waveform
Frequency
1.0000 kHz
Waveform Frequency
Amplitude
5.00 V
Peak-to-peak output
amplitude
Offset
0.00 V
Zero DC offset
Output
OFF
Output disabled
Sweep
OFF
Sweep function disabled
Modulation
OFF
Modulation function disabled
N-BURST
2
Wave per burst for burst
mode
Trig Source
Continuous
Continuous trigger
Trig Rate
10 ms
Internal trigger rate
Table 1 – Power-on Default Settings
3.11 Memory
The waveform generator uses non-volatile flash memory
for storing the front panel settings.
4014B: Up to 10 front panel settings can be stored
(includes storage location 0 for factory default settings).
4040B: Up to 20 front panel settings can be stored
(includes storage location 0 for factory default settings).
3.12 Displaying Errors
The waveform generator displays error messages when
front-panel settings are either invalid or may produce
unexpected results.
38
Table 2 – Error Messages
Message
Text
Description
Out of range
The set value is out of the instrument’s
limits.
Setting
conflict
Settings conflict with another
parameter setting or value.
Empty
location
Attempt to recall settings from an
empty storage location.
Trig rate short
Internal trigger rate is too short to
output waveform or burst.
Save RAM
New firmware installed.
3.13 Quick Start
This section explains how to generate various waveforms
and modify the output waveform.
* Generating a waveform output
* Modifying waveform output
* Storing and recalling a waveform generator setup
3.13.1 Selecting a Standard Waveform
You can select several standard waveforms as: sine,
triangle, square. Creating a standard waveform requires
selecting the waveform type, parameters and their
settings that define the waveform.
Generating a standard waveform requires the following:
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* Selecting the waveform
* Setting the output frequency
* Setting the output amplitude and offset
3.13.2 Setting the Output
To set the output channel, press the Output ON key. The
key will lit indicating the output is enabled.
3.13.3 Using Voltage Offset
Through the offset parameter you can add a positive or
negative DC level to the output waveform.
To set voltage offset:
1. Select a waveform to display its menu.
2. Press F3:Offset to display the offset setting.
3. Use the rotary input knob or the numerical keys to set
the voltage offset.
To turn the voltage offset OFF, repeat the steps above,
but set the offset voltage level to 0.
3.13.4 Storing and Recalling a Waveform
Generator Setup
You can store front-panel setups inside the internal nonvolatile flash memory. When you recall a stored setup,
the front-panel settings change to match the settings in
the stored setup.
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Storing Setups
To store the front-panel setup:
1. Press UTILITY to display the menu.
2. Press F2:Store to select the Store mode.
3. Use the rotary input knob to select a buffer number.
Valid buffer numbers range from 1 to 9 (4014B) or 1 to
19 (4040B).
Buffer 0 is a read-only buffer that contains the default
setup/power-on settings from Table 1.
The function generator will overwrite and store settings
into a buffer that had settings previously stored inside
without a warning.
Recalling Setups
To recall stored front-panel setup:
1. Press UTILITY to display the menu.
2. Press F1:Recall to select the Recall mode.
3. Use the rotary input knob to select a buffer number.
Valid buffers numbers range from 0 to 9 (4014B) or 0
to 19 (4040B). Buffer 0 is a read-only buffer that
contains the default power-on setup.
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4 Programming
4.1 Overview
This section provides detailed information on programming
the generator via the USB (virtual COM) interface.
4.1.1 Connecting to USB (Virtual COM)
Interface
Currently, the USB (virtual COM) interface supports
Windows® XP/7 operating systems.
To connect to a PC for remote communication, please
follow the steps below:
For Windows 7:
1. The USB driver is included in the CD that comes with
the instrument. You can also go to
www.bkprecision.com and browse this product’s page to
find and download the USB driver.
2. Connect the included USB Type A to Type B cable to
the generator and the computer, then power on the
instrument.
3. On most operating systems, it will attempt to
automatically install, showing the following screen:
4. Click the “Close” button to stop the automatic search of
the driver from Windows Update.
5. Now, go to Device Manager on the computer (Open up
the “start” button, and right-click “Computer” and select
“Properties”. Click “Device Manager” link on the top left
of the side menu)
6. There will be an item listed under “Other devices”
labeled “AT91USBSerial”. Right-click the item and
select “Update Driver Software…”
43
7. In the following window, select “Browse my computer for
driver software”, and following this, select “Let me pick
from a list of device drivers on my computer”.
8. Now there will be a window listing Common hardware
types. Click the “Next” button and select on the
following screen “Have Disk…”
9. From the “Install From Disk” window, click “Browse…”
and locate and double-click the USB driver file
44
downloaded from the website labeled
“atm6124_cdc.inf”.
10. Now click “OK”. It will show in the window under Model
“AT91 USB to Serial Converter”. Click “Next” and you
will get the following note:
11. Go ahead and click “Yes”. When you get the following
prompt, select “Install this driver software anyway”.
12. The driver will now install. Once finished, under “Device
Manager”, you should see under “Ports (COM & LPT)”
an item labeled “BK Precision USB to Serial Converter
(COM#)”. The “COM#” is the com port that can be used
to access the virtual COM port for remote
communication.
45
For Windows XP:
1. The USB driver is included in the CD that comes with
the instrument. You can also go to
www.bkprecision.com and browse this product’s page to
find and download the USB driver.
2. Connect the included USB Type A to Type B cable to
the generator and the computer, then power on the
instrument.
3. The following screen will appear.
4. Select “No, not this time” and click “Next”.
5. In the following screen, select “Install from a list or
specific location (Advanced)” and click “Next”.
6. In the next screen, select “Don’t search. I will choose the
driver to install.” and click “Next” again.
7. In the following screen, click “Have Disk…”
8. From the “Install From Disk” window, click “Browse…”
and locate and double-click the USB driver file
46
downloaded from the website labeled
“atm6124_cdc.inf”. Select it and click “OK”.
9. The following screen will appear.
10. Click “Next”, and a prompt will appear:
47
11. Click on “Continue Anyway” and the driver will now
install.
12. The driver will now install. Once finished, under “Device
Manager” (This can be opened by: Right-click “My
Computer”->Select “Properties”->Select “Hardware” tab-
>Click “Device Manager”), you should see under “Ports
(COM & LPT)” an item labeled “BK Precision USB to
Serial Converter (COM#)”. The “COM#” is the com port
that can be used to access the virtual COM port for
remote communication.
48
4.1.2 USB (Virtual COM) Settings
The USB (virtual COM) interface settings for the
communication port are as follows:
BAUDRATE: 115200
PARITY: NONE
DATA BITS: 8
STOP BIT: 1
FLOW CONTROL: NONE
4.2 Device States
The device may be in one of the two possible states
described below.
4.2.1 Local State (LOCS)
In the LOCS state, the device may be operated from the
front panel.
4.2.2 Remote State (REMS)
In the REMS state, the device may be operated from the
USB interface. Actuating any front panel key will cause the
device state to revert to the LOCS.
49
4.3 Message Exchange Protocol
The device decodes messages using the Message
Exchange Protocol similar to the one defined in IEEE
488.2. The following functions implemented in the MEP
must be considered:
4.3.1 The Input Buffer
The device has a 128-byte long cyclic input buffer.
Decoding of remote messages is begun as soon as the
input buffer is not empty, that is, as soon as the controller
has sent at least one byte to the device. Should the input
buffer be filled up by the controller faster than the device
can remove the bytes and decode them, the bus
handshake (CTS/RTS) is used to pause data transfer until
room has been made for more bytes in the buffer. This
prevents the controller from overrunning the device with
data.
4.3.2 The Output Queue
The device has a 100-byte long output queue in which it
stores response messages for the controller to read. If at
the time a response message is formatted the queue
contains previously formatted response messages, such
that there is not enough places in the queue for the new
message, the device will hold off putting the message in
the queue until there is place for it.
50
4.3.3 Response Messages
The device sends a Response Message in response to
a valid query. All queries return a single Response
Message Unit.
4.4 Instrument Identification
The *IDN? common query is used to read the
instrument's identification string. The string returned is as
follows:
BK, MODEL 4040B,0,V0.1
The “V0.1” reflects the firmware version number
and will change accordingly.
4.5 Instrument Reset
The *RST common command effects an instrument
reset to the factory default power up state.
4.6 Command Syntax
4.6.1 General Command Structure
A Program Message is defined as a string containing one
Program Message Units, which is an instrument command
51
or query. The Program Message is terminated by the
Program Message Terminator.
The Program Message Terminator consists of optional
white space characters, followed by the Linefeed (LF)
character (0x0A).
The Program Message Unit can be divided into
three sections as follows:
a) Program Header
The Program Header represents the operation to be
performed, and consists of ASCII character mnemonics.
Two types of Program Headers are used in the
MODEL 4040B: Instrument-control headers and Common
Command and Query headers. Common Command and
Query Program Headers consist of a single mnemonic
prefixed by an asterisk ('*').
The mnemonics consist of upper - or lower-case alpha
characters.
Example: The command to set the frequency to
1KHZ may be written in the following ways:
FREQ 1KHZ
FREQ 1000HZ
FREQ 1000
FREQ 1E3
freq 1khz
freq 1000hz
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freq 1000
freq 1e3
b) Program Header Separator
The Program Header Separator is used to separate the
program header from the program data. It consists of one
or more white space characters, denoted as <ws>.
Typically, it is a space.
c) Program Data
The Program Data represent the values of the parameters
being set, for example, the '1KHZ' in the above
examples. Different forms of program data are accepted,
depending on the command. The Program Data types
used in the instrument are:
i) Character program data
This form of data is comprised of a mnemonic made up of
lower - or upper-case alpha characters. As with Program
Header mnemonics, some Character Data mnemonics
have short and long forms. Only the short or the long form
may be used.
ii) Boolean data
Boolean data indicate that the parameter can take one of
two states, ON or OFF. The parameter may be character
type
53
ON or OFF
or numeric. A numeric value is rounded to an integer. A
non-zero result is interpreted as 1 (ON), and a zero result
as 0 (OFF).
Queries return the values 0 or 1.
iii) NRf
This is a decimal numeric data type, where
NR1 indicates an integer number,
NR2 indicates a fixed point real number, and
NR3 indicates a floating point real number.
iv) Numeric value program data
This data type defines numeric values, as well as special
cases of Character Data. Numeric values may be
specified in any of Integer, Fixed Point or Floating Point
format. All parameters which have associated units accept
a suffix, which may be specified using upper or lower-case
characters. When the suffix is not specified, the numeric
value is accepted in the default units, which are Hertz for
frequency, Seconds for time, and Volts for voltage. To set
the frequency to 1KHz we can send one of the following
commands:
FREQ 1000
FREQ 1E3
The special forms of character data accepted as
numbers are
54
MAXimum: sets the parameter to its maximum
value.
MINimum: sets the parameter to its minimum
value.
For example, to set the frequency to its maximum
value we can send the command
FREQ MAX
Some Program Message Units either require, or can
accept, more than one data element. Program data
elements are separated from each other by the Program
Data Separator. It is defined as optional white space
characters followed by a comma (','), which in turn is
followed by optional white space characters.
There are two types of Program Message Units:
Command Message Units and Query Message Units. A
Query differs from a Command in that the Program
Header is terminated with a question mark ('?'). For
example, the frequency might be queried with the
following query:
FREQ?
Some Query Message Units accept data, giving the device
more specific information about what is being queried. In
many cases the Query Message Unit may optionally be
supplied with the MIN or MAX mnemonics as data. This
55
tells the device to return the minimum or maximum value
to which the parameter may currently be set. For example,
FREQ? MAX
will return the maximum value to which the
frequency may currently be set.
Not all Program Message units have query forms (for
example, SAV), and some Program Message Units might
have only the query form (for example IDN?).
The instrument puts the response to the query into the
output queue, from where it may be read by the controller.
NOTE: All commands should be terminated with a
<CR> carriage return or <LF> line feed character. Any
response string from a query command has both
<CR> and <LF> characters appended. For example,
an amplitude query command will return
1.23<CR><LF>.
4.7 Status Reporting
The instrument is capable of reporting status events and
errors to the controller.
4.7.1 The Error Queue
The error queue is used to store codes of errors detected
in the device. It is implemented as a cyclic buffer of
56
length 10. The error queue is read with the following
query:
ERR?
The first error in the queue is returned, and the queue is
advanced.
4.7.2 Error Codes
The negative error codes are defined by SCPI. Positive
codes are specific to the instrument.
The error message is returned in the form
<error number>,"<error description>"
A table of error numbers and their descriptions is
presented here.
No error reported
0 - No error
Command Errors
A command error is in the range -199 to -100, and
indicates that a syntax error was detected. This includes
the case of an unrecognized header.
-100 Command Error
57
-101 Invalid character
-102 Syntax error
-103 Invalid separator
-104 Data type error
-108 Parameter not allowed
More parameters than allowed were
received
-109 Missing parameter
Fewer parameters than necessary
were received
-110 Command header error
-111 Header separator error
-112 Program mnemonic too long
The mnemonic must contain no more
than 12 characters.
-113 Undefined header
-120 Numeric data error
-121 Invalid character in number
-123 Exponent too large
-124 Too many digits
-128 Numeric data not allowed
A different data type was expected
-131 Invalid suffix
-134 Suffix too long
-138 Suffix not allowed
-140 Character data error.
-141 Invalid character data.
Incorrect character data were
received.
-144 Character data too long
Character data may contain no more
than 12 characters.
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-148 Character data not allowed
-158 String data not allowed
-161 Invalid block data
An error was found in the block data
-168 Block data not allowed
-178 Expression data not allowed
Execution Errors
An execution error indicates that the device could not
execute a syntactically correct command, either since the
data were out of the instrument's range, or due to a device
condition.
-200 Execution error
An attempt was made to RECALL the
contents of an uninitialized stored
setting buffer.
-211 Trigger ignored.
The *TRG common command was
ignored due to the device not being in
the correct state to execute the
trigger.
-220 Parameter error.
A parameter is in the correct range,
but conflicts with other parameters.
-221 Settings conflict.
The parameter is out of range due to
the current instrument state.
-222 Data out of range.
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-223 Too much data.
The arbitrary waveform memory limit
has been exceeded.
-224 Illegal parameter value.
The parameter value must be
selected from a finite list of possibilities.
Device-Specific Errors
An error specific to the device occurred.
-315 Configuration memory lost.
Device memory has been lost.
-330 Self-test failed.
-350 Queue overflow.
Error codes have been lost due to more than 10 errors
being reported without being read.
Query Errors
A query error indicates that the output queue control
has detected a problem. This could occur if either an
attempt was made to read data from the instrument if none
was available, or when data were lost. Data could be lost
when a query causes data to be formatted for the
controller to be read, and the controller sends more
commands without reading the data.
-410 Query INTERRUPTED.
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Data were sent before the entire
response of a previous query was read.
-420 Query UNTERMINATED.
An attempt was made to read a response before the
complete program message meant to generate that
response was sent.
Warnings
The execution of some commands might cause an
undesirable instrument state. The commands are
executed, but a warning is issued.
500 Trigger rate short
510 Output overload
"Trigger rate short" means that the period of the waveform
is larger than the value of the internal trigger rate. Thus
not every trigger will generate a cycle (or burst) of the
waveform.
4.8 COMMON COMMANDS
4.8.1 System Data Commands
*IDN? - Identification query
The identification query enables unique identification of
the device over the GPIB. This query should always be
the last in a program message. It returns a string with four
fields:
61
Manufacturer name
Model name
Serial number (0 if not relevant)
Version number
Command
Type: Common Query
Syntax: *IDN?
Response: BK, MODEL 4040B,0,V1.1
4.8.2 Internal Operation Commands
*RST - Reset command
The Reset command performs a device reset. It
causes the device to return to the factory default power up
state.
Type: Common Command
Syntax: *RST
4.8.3 Device Trigger Commands
a) *TRG - Trigger command
This command is analogous to the IEEE 488.1 Group
Execute Trigger interface message, and has the same
effect. It is used to trigger the device to output a wave, and
is accepted only when the trigger mode is set to Trigger,
Gate or Burst, and the trigger source is set to BUS.
62
Type: Common Command
Syntax: *TRG
4.8.4 Stored Settings Commands
*RCL - Recall instrument state
This command is used to restore the state of the device to
that stored in the specified memory location.
Arguments
Type <NRf>
Range 0 to 9 (4014B) / 0 to 19 (4040B). Non integer
values are rounded before execution
Type: Common Command
Syntax: *RCL<ws><NRf>
Example: *RCL 0 (Recall default state)
*RCL 9
*SAV - Save instrument state
This command is used to store the current instrument
state in the specified memory location.
Arguments
Type: <NRf>
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Range: 0 to 9 (4014B) / 0 to 19 (4040B). Non
integer values are rounded before
execution
Type: Common Command
Syntax: *SAV<ws><NRf>
Example: *SAV 2
Stored setting location 0 stores the factory defaults, and is
a read-only location.
4.9 INSTRUMENT CONTROL
COMMANDS
Instrument control commands are grouped into logical
subsystems according to the SCPI instrument model. The
commands are comprised of mnemonics indicating the
subsystem to which the command belongs, and the
hierarchy within that subsystem. When the command is to
be referred to the Root node, it should be prefixed with a
colon (:). Mnemonics appearing in square brackets [...] are
optional. The '|' character is used to denote a choice of
specifications. The '<ws>' is used to denote a white space
character.
Note: When controlling the instrument remotely, do
not interrupt the instrument with front panel
interactions. Although the instrument will be
automatically changed back to LOCS (local) mode,
subsequent remote commands may cause errors
during communication, in which will require a need of
64
restarting the instrument before continuing again with
remote operations.
4.9.1 Default Subsystem
The Source Subsystem controls the frequency, voltage,
amplitude modulation and clock source. The command
structure is as follows:
FUNCtion SINusoid|SQUare|TRIangle|
FREQuency <numeric value>
AMPLitude <numeric value>
OFFSet <numeric value>
DCYCle <numeric value>
OUTPUT ON/OFF
MODULation OFF/AM/FM/INT/EXT
DEPTh <numeric value>
MODFRequency <numeric value>
MODSHape SIN/TRI/ SQU
DEViation <numeric value>
SWEep ON/OFF/LIN/LOG
SWRAte <numeric value>
SWSTArt <numeric value>
SWSTOp <numeric value>
MODE CONT/ TRIG / GATE / BRST
TRIG INT / EXT
TRAte <numeric value>
BURSt <numeric value>
65
FREQuency <frequency>
The frequency command controls the frequency of
the output waveform.
Arguments
Type: Numeric.
Units: MHz, KHz, Hz (default)
Range: For SIN and SQU – 0.1 Hz to Max.
frequency (see specifications),
For TRI – 0.1 Hz to 1 MHz,
Rounding: The value is rounded to 5 digits or 100 mHz.
Command Type: Setting or Query
Setting
Syntax: FREQuency<ws><frequency>[units]
FREQuency<ws>MINimum|MAXimum
Examples: FREQ 5KHZ
FREQ 5E3
FREQ MAXIMUM
FREQ MIN
Query
Syntax: FREQuency?[<ws>MAXimum|MINimum]
Examples: FREQ?
FREQ? MAX
Response: NR3
Considerations:
66
1) The MIN and MAX arguments refer to currently
settable minimum or maximum.
2) FIXed is alias for CW.
AMPLitude <p-p amplitude>
The amplitude command is used to set the peak-to-peak
amplitude of the output waveform. Note that the amplitude
and the offset are limited by the relation:
Peak Amplitude + |Offset| <= 5V
Arguments
Type: Numeric
Units: V, mV, VPP, mVPP
Range: 10mV to 10V
Rounding: 1mV for 10mV to 999mV. 10mV for 1V to
10V.
Command Type: Setting or Query
Setting
Syntax: AMPLitude<ws><amplitude>[units]
AMPLitude<ws>MINimum|MAXimum
Examples: AMPL 2.5
AMPL 2.5V
AMPL MAX
Query
Syntax: AMPLitude? <ws>MINimum|MAXimum]
Examples: AMPL?
AMPL? MAX
Response: NR2
Considerations:
67
1) The MAXimum amplitude is dependent on the offset.
2) The MAX and MIN arguments should not be used in a
program message containing an OFFSet command, since
these values are evaluated during parsing, based on the
current value of the offset.
OFFSet <offset>
The offset command is used to set the DC offset of the
output waveform. Note that the amplitude and the offset
are limited by the relation:
Peak Amplitude + |Offset| ≤ 5V
Arguments
Type: Numeric
Units: V, mV
Range: 10mV to 5V
Rounding: To 10mV
Command Type: Setting or Query
Setting
Syntax: OFFSet<ws><offset>[units]
OFFSet<ws>MINimum|MAXimum
Examples: OFFS 2.5
OFFS 2.5V
OFFS MAX
Query
Syntax: OFFSet?[<ws>MINimum|MAXimum]
Examples: OFFS?
OFFS? MAX
68
Response: NR2
Considerations:
1) The MAXimum offset is dependent on the amplitude.
2) The MAX and MIN arguments should not be used in a
program message containing an AMPLitude command,
since these values are evaluated during parsing, based on
the current value of the amplitude.
FUNCtion
The function command is used to set the type of waveform
to be generated by the instrument.
Command Type: Setting or Query
Setting Syntax: FUNCtion<ws><SIN|SQU|TRI>
Examples: FUNC SIN
FUNC TRI
Query Syntax: FUNCtion?
Examples: FUNC?
Response: SIN|TRI|SQU
DCYCle <duty cycle value>
This command is used to set the duty-cycle of the square
wave or the symmetry of triangular wave. The value is
given in percent .
Arguments Type: Numeric
Units: None (percent implied)
69
Range: 1 to 99
Rounding: To integer
Command Type: Setting or Query
Syntax: DCYCle <ws><duty cycle value>
DCYCle <ws>MINimum|MAXimum
Query Syntax: DCYCle?[<ws>MINimum|MAXimum]
Response: NR3
OUT <state>
This command controls whether the output is ON or OFF.
Arguments
Type: Boolean
Command Type: Setting or Query
Setting
Syntax: OUT<ws>ON|1|OFF|0
Examples: OUT ON
OUT 1
Query
Syntax: OUT?
Response: 0|1
MODULation
This command activates or deactivates modulation:
Command Type: Setting or Query
Setting
Syntax: MODULation OFF|AM|FM|INT|EXT
Examples: MODULation FM
70
MODULation OFF
MODULation EXT
Query
Syntax: MODULation?
Response: OFF |
AM INT |
AM EXT |
FM INT |
FM EXT
DEPTh
This command sets the AM modulation depth in %
Arguments
Type: Numeric
Units: none (implied %)
Range: 0 to 100
Rounding: To integer
Command Type: Setting or Query
Setting
Syntax: DEPTh<ws><percent depth>
DEPTh<ws>MINimum|MAXimum
Examples: DEPTh 50
Query
Syntax: DEPTh?[<ws>MINimum|MAXimum]
Response: NR3
MODFRequency
71
This command sets the AM and FM modulating waveform
frequency
Arguments
Type: Numeric.
Units: MHz, KHz, Hz (default)
Range: Fmax = 20 KHz
Fmin = 0.01 Hz
Command Type: Setting or Query
Setting
Syntax: MODFR<ws><frequency>[units]
MODFR<ws>MINimum|MAXimum
Examples: MODFR 5KHZ
MODFR 5E3
MODFR MAXIMUM
MODFR MIN
Query
Syntax: MODFR?[<ws>MAXimum|MINimum]
Examples: MODFR?
MODFR? MAX
Response: NR3
MODSHape
This command selects the modulating waveform shape
Arguments
Type: Character
Options: SINusoid, TRIangle, SQUare
Command Type: Setting or Query
Setting
72
Syntax: MODSHape<ws><SIN|TRI|SQU>
Examples: MODSHape SIN
MODSHape TRI
Query
Syntax: MODSHape?
Response: SIN|TRI|SQU
DEViation
This command sets the FM modulation deviation
Arguments
Type: Numeric.
Units: MHz, KHz, Hz (default)
Range:
Fmax = carrier frequency
Fmin = 0.01 Hz
Command Type: Setting or Query
Setting
Syntax: DEViation<ws><frequency>[units]
DEViation<ws>MINimum|MAXimum
Examples: DEV 5KHZ
DEV 5E3
DEV MAXIMUM
DEV MIN
Query
Syntax: DEViation?[<ws>MAXimum|MINimum]
Examples: DEV?
DEV? MAX
Response: NR3
73
SWEep
This command activates or deactivates sweep:
Arguments
Type: Boolean
Command Type: Setting or Query
Setting
Syntax: SWE<ws>ON|OFF|LIN|LOG
Examples: SWE ON
SWE LIN
Query
Syntax: SWE?
Response: OFF|LIN ON|LIN OFF|LOG ON|LOG
OFF
Note: Sweep will automatically be active if set to Linear or
Logarithmic.
SWRAte
This command sets the time for one complete sweep:
Arguments
Type: Numeric
Units: S, mS, uS, nS
Range: 10mS to 100S
Command Type: Setting or Query
Setting
Syntax: SWRAte<ws><time>[units]
SWRAte<ws>MINimum|MAXimum
74
Examples: SWRAte 50MS
Query
Syntax: SWRAte?[<ws>MINimum|MAXimum]
Response: NR3
SWSTArt
This command sets the start frequency of the sweep:
Arguments
Type: Numeric.
Units: MHz, KHz, Hz (default)
Range: Dependent on the frequency range of the
current function.
Command Type: Setting or Query
Setting
Syntax: SWSTArt<ws><frequency>[units]
SWSTArt<ws>MINimum|MAXimum
Examples: SWSTArt 5KHZ
SWSTArt 5E3
SWSTArt MAXIMUM
SWSTArt MIN
Query
Syntax: SWSTArt?[<ws>MAXimum|MINimum]
Examples: SWSTArt ?
SWSTArt ? MAX
Response: NR3
SWSTOp
This command sets the stop frequency of the sweep:
75
Arguments
Type: Numeric.
Units: MHz, KHz, Hz (default)
Range: Dependent on the frequency range of the
current function.
Command Type: Setting or Query
Setting
Syntax: SWSTOp<ws><frequency>[units]
SWSTOp<ws>MINimum|MAXimum
Examples: SWSTOp 5KHZ
SWSTOp 5E3
SWSTOp MAXIMUM
SWSTOp MIN
Query
Syntax: SWSTOp?[<ws>MAXimum|MINimum]
Examples: SWSTOp ?
SWSTOp ? MAX
Response: NR3
MODE <trigger mode>
This command is used to set the trigger mode.
Arguments
Type: Character
Options: CONTinuous
TRIGger
GATE
BURSt
76
Command Type: Setting or Query
Setting
Syntax: MODE<ws><CONT|TRIG|GATE|BURS>
Examples: MODE CONT
MODE BURS
Query
Syntax: MODE?
Response: CONT|TRIG|GATE|BURS
TRIGger <trigger source>
This command is used to select the trigger source, for use
in the Trigger, Gate and Burst trigger modes.
Arguments
Type: Character
Command Type: Setting or Query
Setting
Syntax: TRIGger<ws><INT|EXT>
Examples: TRIG EXT
TRIG INT
Query
Syntax: TRIGger?
Response: INT|EXT
BURSt <burst count>
77
This command is used to set the number of cycles to be
output in the BURST mode. It is not a standard SCPI
command.
Arguments
Type: Numeric
Range: 1 to 65535
Rounding: To integer value
Command Type: Setting or Query
Setting
Syntax: BURSt<ws><value>
Examples: BURS 100
BURS MAXIMUM
Query
Syntax: BURSt?[<ws>MAXimum|MINimum]
Response: NR1
Examples: BURST?
BURS? MAX
TRAte <trigger rate>
Sets the rate of the internal trigger.
Arguments
Type: Numeric
Units: S, mS, uS, nS
Range: 1 uS to 10S
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Rounding: to 4 digits
Command Type: Setting or Query
Setting
Syntax: TRAte<ws><value>[units]
TRAte<ws>MINimum|MAXimum
Examples: TRAte 10E-6
TRAte MIN
Query
Syntax: TRAte?[<ws>MINimum|MAXimum]
Response: NR3
Examples: TRAte?
TRAte? MIN
ERRor?
This query returns the first entry in the error queue, and
removes that entry from the queue.
Command Type: Query only
Query
Syntax: ERRor?
Response: <Error number>, "<error description>"
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SERVICE INFORMATION
Warranty Service: Please go the support and service section on our website
www.bkprecision.com to obtain a RMA #. Return the product in the original
packaging with proof of purchase to the address below. Clearly state on the RMA the
performance problem and return any leads, probes, connectors and accessories that
you are using with the device.
Non-Warranty Service: Please go the support and service section on our website
www.bkprecision.com to obtain a RMA #. Return the product in the original
packaging to the address below. Clearly state on the RMA the performance problem
and return any leads, probes, connectors and accessories that you are using with the
device. Customers not on an open account must include payment in the form of a
money order or credit card. For the most current repair charges please refer to the
service and support section on our website.
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 America 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.
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LIMITED THREE-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 three years 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 help us better serve you, please complete the warranty registration for
your new instrument via our website www.bkprecision.com
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 limitation 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 rights 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
81
Index
Amplitude, 12, 25, 38
cursor, 36
duty cycle, 26
Errors, 38
factory default, 37
frequency, 25
Impedance Matching,
24
LCD, 21
Linear, 32
Offset, 25
recall, 41
safety, 2
Specifications, 11
store, 41
Symmetry, 26
Sync Out, 23
83
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
© 2013 B&K Precision Corp.
V112713
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