Data Sheet
DDS Sweep Function Generators
Models 4014B and 4040B
Features & Benefits
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Sine and square waveforms up to
12 MHz (4014B) or 20 MHz (4040B)
Triangle/ramp waveforms up to
1 MHz (4014B) or 2 MHz (4040B)
Bright color display with waveform preview
Linear and logarithmic sweep
AM/FM modulation
Independent output and DC offset amplifiers
allow for small amplitude output signals with
large DC offsets
Models 4014B and 4040B are 12 MHz and
20 MHz DDS (direct digital synthesis) function
generators that generate stable and precise sine,
square, and triangle waveforms. Both models
provide variable output voltages from 0 to
10 Vpp into 50
Ω
(up to 20 Vpp into open
circuit), linear and logarithmic sweep, AM/FM
modulation, built-in counter, and a continuously
variable DC offset that allows the output to be
injected directly into circuits at the correct bias
level. Separate output amplitude and DC offset
amplifiers let you set a large DC offset (e.g.
± 4.99 V ) with a small amplitude output signal
(e.g. 10 mV), a feature typically found in more
expensive generators.
The 4014B and 4040B are both designed
with a dual technology architecture, combining
traditional DDS technology with a low-jitter
square wave generator. The instruments
generate a 2-point waveform to simulate the
amplitude and use a high accuracy PLL
(phase-locked loop) circuit for timing. Compared
to signals generated by typical low-cost DDS
function and arbitrary waveform generators, this
implementation significantly minimizes jitter and
improves edge stability of square waves. The
improved signal integrity allows these generators
to be used for simulating reliable clock signals,
generating triggers, or validating serial data
buses.
These models are suitable for education and
other applications that require digital function
generators with sweep and modulation
capabilities.
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Low-jitter square wave generation
Adjustable duty cycle
Output ON/OFF button
Internal/external triggering
Gate and burst mode (4040B only)
Built-in counter
USB interface
SCPI-compliant command set
Short circuit and overvoltage protection on all
inputs and outputs
Model
Sine and square frequency range
Triangle/ramp frequency range
4014B
0.01 Hz - 12 MHz
0.01 Hz - 1 MHz
4040B
0.01 Hz - 20 MHz
0.01 Hz - 2 MHz
Technical data subject to change
© B&K Precision Corp. 2018
www.bkprecision.com
DDS Function Generators
Models 4014B and 4040B
Front panel
Dedicated
waveform keys
Color LCD display
Numeric keypad
Intuitive user interface
Easily change all waveform parameters using the
intuitive menu-driven front panel keypad, rotary
control knob, and large color LCD display that
shows a preview of the output waveform.
Convenient waveform and range selection buttons
let users make quick and precise adjustments to
the output signal.
Rotary
control knob
Output
On/Off button
Main output
Versatile tools
Menu function keys
Lin/Log sweep key
Modulation
key
Utility
key
Sync output
Rear panel
Both models provide AM and FM modulation
along with linear/logarithmic sweep and built-in
counter capabilities. Internal and external sources
can be used for triggering and modulating the
signal.
Trigger/counter input connector
Easy PC connectivity
Modulation input connector
USB interface
The function generators can be programmed
remotely via the USB (virtual COM) interface
using SCPI commands. B&K Precision also offers
application software (available for download at
www.bkprecision.com) that provides virtual front
panel emulation, allowing users to remotely
control their instrument without the need for
programming.
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DDS Function Generators
Models 4014B and 4040B
Specifications
Frequency Characteristics
4014B
0.01 Hz to 12 MHz
0.01 Hz to 12 MHz
0.01 Hz to 1 MHz
4040B
Modulation Characteristics
Sine
Square
Triangle
Resolution
Accuracy
Output Characteristics
0.01 Hz to 20 MHz
0.01 Hz to 20 MHz
0.01 Hz to 2 MHz
Amplitude Modulation
Internal
External
Frequency Modulation
Internal
External
Sweep Characteristics
0.1 Hz – 20 kHz sine only
0.1 Hz – 20 kHz sine, square,
or triangle waveform
6 digits* or 10 mHz
0.01% ± 0.006 Hz
10 mVpp to 10 Vpp (into 50
Ω);
20 mVpp to 20 Vpp (open circuit)
3 digits (1,000 counts)
± 2% ± 20 mV of programmed output from 1.01 V – 10 V
± 0.5 dB to 1 MHz
± 1 dB to 12 MHz
± 0.5 dB to 1 MHz
± 1 dB to 20 MHz
5 Vp-p for 100% modulation, 10 kΩ input impedance
0.1 Hz – 20 kHz sine only
0.1 Hz – 20 kHz sine, square,
or triangle waveform
Amplitude Range
Amplitude Resolution
Amplitude Accuracy
Flatness
DC Offset Range
DC Offset Resolution
DC Offset Accuracy
Output Impedance
Output Protection
5 Vp-p for 100% modulation, 10 kΩ input impedance
Sweep Shape
Sweep Time
Input and Output
Linear or Logarithmic, up or down
10 ms to 100 s
-4.99 V to 4.99 V (into 50
Ω)
10 mV, 3 digits
± 2% ± 10 mV (into 50
Ω)
50
Ω
± 2%
Protected against short circuit or accidental voltage applied
to the main output connector
Trigger IN
TTL compatible
Maximum rate 1 MHz
Input impedance 1 kΩ
Minimum width > 50 ns
TTL pulse at programmed frequency; 50
Ω
source impedance
5 Vp-p for 100% modulation
10 kΩ input impedance
DC to > 20 kHz minimum bandwidth
Sync OUT
Modulation IN
Waveform Characteristics
Harmonic Distortion
0 – 1 MHz, < -60 dBc
(for sine wave at
1 MHz – 5 MHz, <-50 dBc
5 Vp-p into 50
Ω)
5 MHz – 12 MHz, <-45 dBc
Square Rise/Fall Time
Duty Cycle
Symmetry Accuracy
at 50%
Jitter (square)
Operating Modes
0 – 1 MHz, < -60 dBc
1 MHz – 5 MHz, <-50 dBc
5 MHz – 12 MHz, <-45 dBc
12 MHz – 20 MHz, <-50 dBc
Counter Characteristics
Range
Resolution
Accuracy
Sensitivity
General
50 Hz to 25 MHz
Auto ranging, up to 8 digits
± 0.02% ± 2 digits
100 mVrms typical
≤
20 ns (10% to 90% at full amplitude into 50
Ω)
Square: 20% - 80% to 2 MHz
Triangle: 1% - 99% in 1% steps, up to 200 kHz
± 1%
< 100 ps rms (cycle-to-cycle, typical)
Memory Storage
Power Requirements
Operating
Temperature
Storage Temperature
Humidity
Dimensions
(W x H x D)
Weight
Electromagnetic
Compatibility
Safety
10 instrument settings
20 instrument settings
100 V – 240 V AC ± 10%
32 °F to 122 °F (0 °C to 50 °C)
14 °F to 158 °F (-10 °C to 70 °C)
95% R.H. 0 °C to 30 °C
8.39” x 3.46” x 8.27” (213 x 88 x 210 mm)
5.5 lbs (2.5 kg)
Meets EMC Directive 2004/108/EC, EN55011, EN55082
Meets Low Voltage Directive 2006/95/EC, EN61010
Continuous
Triggered
Output continuous at programmed parameters
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.
Same as triggered mode, except
waveform is executed for the
duration of the gate signal.
The last cycle started is
completed.
2-65535 cycles
Gate
-
Burst
Trigger Source
-
Three-Year Warranty
Included Accessories
Power
cord, USB (type A to B) interface cable, certificate
of calibration
Trigger source may be internal, external, or manual.
Internal trigger rate 0.1 Hz – 1 MHz (1 us – 10 s)
*
For square wave, resolution is up to 4 digits when frequency is > 20 kHz.
Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 ºC ± 5 ºC.
Specifications are subject to change without notice.
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