Data sheet
25 MHz Arbitrary / Function Generators
Models 4075 & 4078
Common Features & Benefits
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14-bit,
100 MSa/s, 400 k point Arbitrary
Waveform Generator
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25
MHz Sine / 25 MHz Square waveforms
Pulse, Ramp, Triangle, Noise, Sin
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Predefined
(X)/X, Exponential and Gaussian waveforms
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AM,
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10
FM and FSK modulation
graphical LCD shows a detailed output
mVpp to 10 Vpp into 50
Ω
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Large
4075
waveform representation
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Fully
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Fully
programmable markers
protected output
case calibration
waveform editing software included
GPIB versions available
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Closed
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Arbitrary
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SCPI
compliant command set
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Optional
4078
Industry Leading Performance
Models 4075 and 4078 are versatile high performance function/arbitrary waveform generators with the
largest arbitrary memory depth in their class. The generators combine the ability to produce nearly any
conceivable arbitrary waveform with accuracy and precision and a DDS architecture offering easy to use
conventional function generator capabilities. Arbitrary waveforms have 14 bit amplitude resolution,
100MSa/s sample rate and up to 400,000 points length. Waveforms can be output in continuous, trig-
gered, gated or burst modes. Front panel operation is straightforward and user-friendly. The instruments
can be remotely controlled using SCPI-compliant commands via RS232.
Extensive features such as internal or external AM, FM and FSK modulation along with versatile sweep
capabilities and variable edge pulse generation make these generators suitable for a wide range of applica-
tions including electronic design, sensor simulation, functional test or generation of I/Q modulated signals.
Dual Channel Model 4078
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Both
channels offer full functionality. All wave
form parameters such as frequency, amplitude
and offset can be set independently
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Synchronize
both output signals to the same
clock signal (external or internal) and precisely
adjust the phase relationship between the two
signals
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Economical
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Saves
baseband I/Q signal source
cost and bench space
Options
Model 4075 with GPIB interface: Order model
number 4075GPIB
Model 4078 with GPIB interface: Order model
number 4078GPIB
Technical data subject to change
© B&K Precision Corp. 2010
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Tel.: 714.921.9095
25 MHz Arbitrary / Function Generators
Models 4075 & 4078
L
Front panel
Informative
LCD with detailed display of
waveform parameters
Easy-to-use keypad
allows efficient parameter
configuration
Model 4078 allows for both
independent and phase synchro-
nized waveform generation
Intuitive user interface
These Waveform Generators use a menu-driven
front panel keypad and control knob along with
an easy-to-read graphical LCD to adjust all
waveform parameters, which are visible at one
glance. Arbitrary waveform editing and definition
is flexible and easy: Waveforms can be defined
from scratch by entering data point by point, by
loading and modifying predefined built-in wave-
forms or by downloading waveforms via the
remote interface, using either the included arbi-
trary waveform generation software Wave-X or a
custom program. Standard function generator
waveforms sine, square, ramp and pulse can be
created by pressing a single button.
L
Rear panel
4078 only
optional GPIB interface
Flexible interface
Built-in 10 MHz external reference is included
at no extra cost (both models).
This input/output let’s you synchronize with
another 4075/4078 generator or to an
external 10 MHz Clock for precise phase
adjustment.
Connect the programmable marker Output to
the Trigger input of additional generators to
create complex polyphase scenarios.
4075 & 4078
10 MHz external reference
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25 MHz Arbitrary / Function Generators
Models 4075 & 4078
Flexible memory management
Unlike other comparable generators, which
typically contain only a few fixed-size memory
locations for waveform storage, the 4075 and
4078 gives users more freedom - the 400000
point flash memory can be allocated to one large
waveform or up to 50 different waveforms, each
with a customizable length.
Versatile noise generation
In Arb mode you can conveniently add noise to
your waveform directly from the front panel and
precisely adjust the scale of the noise amplitude.
Unlike other generators that only produce a
noise waveform, this feature allows you to
choose between generating a noise waveform or
adding noise to an existing waveform.
Programmable Markers
Models 4075 and 4078 provide fully program-
mable markers, allowing you to generate a
positive TTL level output signal at the points
specified by address and length up to 4000
points. This feature is available in Arbitrary mode
and can not be found in other comparable
waveform generators. It could be used for
applications requiring polyphase signal
generation, e.g. simulation of a real world 3
phase AC network where one of the phases is
degraded with spikes or noise.
Generate waveforms with ease
The included PC Software allows you to easily
generate, edit and download custom arbitrary
waveforms.
Generate waveforms by importing a textfile, or
define via freehand, point draw or waveform
math. Waveforms can also be uploaded from the
generator for documentation purposes.
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25 MHz Arbitrary / Function Generators
Models 4075 & 4078
Specifications
4075
Channels
F r eq ue nc y Ch ar ac te ri stic s
Sine
Square
Triangle, Ramp
Pulse
Accuracy
Resolution
A r b itr a ry C ha ra ct er is t ics
Built-in Waveforms
1 Channel
1 µHz to 25 MHz
1 µHz to 25 MHz
1 µHz to 5 MHz
1 mHz to 10 MHz
0.002 % (20 ppm)
12 digits or 1 µHz
models
4078
2 Channels
Triggered
Gate
waveform cycle is limited to 10 MHz in ARB mode
and 5 MHz in DDS mode.
Same as triggered mode, except waveform is executed
for the duration of the gate signal. The last cycle
started is completed
2-999,999 cycles
-180.0 to +180.0 degrees with 0.1 degree resolution
Burst
Phase
Trigger Source
Trigger source may be internal, external or manual.
Internal trigger rate 0.01 Hz-1 MHz (1 µs – 10 s)
M od ul at ion Ch ar a ct er is ti cs
Amplitude Modulation
Internal
External
Frequency Modulation
Internal
External
S we ep C ha ra c ter is t ics
Sweep Shape
Sweep Time
Sweep Trigger
Inpu ts a nd Ou tpu ts
Trigger IN
0.1 Hz-20 kHz sine wave, square or triangle
5 Vp-p for 100% deviation, 10 kΩ input impedance
Linear and Logarithmic, up or down
20 ms to 500 s
internal, external, continuous or burst
TTL Compatible
Maximum rate 10 MHz
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 >50 kHz minimum bandwidth
Positive TTL pulse user programmable in Arbitrary
waveform, 50
Ω
source impedance
10 MHz, TTL compatible, input or output, for
external unit synchronization 50
Ω
output impedance
and 1 kΩ input
1 µs to 100 s
4 digits
+0.002%
50 full panel settings at power-off
400,000 points in flash memory
8.4(213) x 3.5(88) x 12(300) inches (mm) (WxHxD)
Approx. 3 kg (6.6 lbs)
100 VAC-240 VAC ± 10%, 50 VA max.
Operating
0 ºC to + 50 ºC
Non-operating -20 ºC to + 70 ºC
0.1 Hz-20 kHz sine , square or triangle waveform
variable modulation from 0% to 100%
5 Vp-p for 100% modulation, 10 kΩ input
impedance
Sine, Triangle, Square, Noise, Ramp Up, Ramp
Down, Sine(X)/X, Exponential Up, Exponential
Down, Gaussian
2 points to 400,000 points
14 bits (16,384 levels)
Add 1% to 100% to output waveform
100 MSa/s, Point execution rate adjustable from 10 ns-50 s
Accuracy: 0.005% (50 ppm)
Resolution: 4 digits
10 mV to 10 Vp-p into 50
Ω
3 digits (1000 counts)
± 1% ± 1 mV
± 0.2 dB to 1 MHz
± 1 dB to 25 MHz
± 5 V into 50
Ω,
depending on the
Amplitude setting
10 mV with 3 digits resolution
± 1% ± 10 mV into 50
Ω
50
Ω
typical
The instruments output is protected against
short circuit or nominal accidental voltages
applied to the main output connector
Waveform Length
Vertical Resolution
Noise
Sampling Rate
Frequency
O u tp u t C ha ra c ter ist ic s
Amplitude Range
Amplitude Resolution
Amplitude Accuracy (1 kHz)
Flatness (relative to 1 kHz)
Offset Range
Offset Resolution
Offset Accuracy
Output Impedance
Output Protection
Sync OUT
Modulation IN
Marker Out
Reference IN-OUT
W ave for m Ch ar ac t eri stic s
Harmonic Distortion (sine) DC-20 kHz, -65 dBc
20 kHz-100 kHz, -60 dBc
100 kHz-5 MHz, -45 dBc
5 MHz-25 MHz, -30 dBc
Spurious (sine)
DC-1 MHz
< -60 dBc
Rise/Fall Time (square, pulse) < 12 ns (10% to 90%) at full amplitude into 50
Ω
Variable Duty Cycle
20% to 80% to 5 MHz (square)
40% to 60% to 10 MHz (square)
50% >10 MHz (square)
10%-90% to 5 MHz (triangle)
< 1 % + 5 ns
<0.1% of peak output (1 µHz to 250 kHz)
20 ns to <(Period-20 ns)
10 ns resolution
100 ns to Width/0.625 (50 % duty cycle)
10 ns resolution
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
I nt ern al Tri gger
Repetition
Resolution
Accuracy
Ge ner al
Store Memory
Arbitrary Memory
Dimensions
Weight
Power
Temperature
Humidity
EMC
Variable Symmetry
Symmetry at 50%
Linearity (triangle, ramp)
Pulse Width
(period 10 µs - 0.1 µs)
Variable Edge Time
(period 100 µs - 0.16 µs)
O p er at ing Mod es
Continuous
Triggered
95 % RH , 0 ºC to 30 ºC
According to EN55011 for radiated and conducted
emissions
Electrical Discharge Immunity According to EN55082
Safety Specifications
According to EN61010 , CE approved
Three Year Warranty
Accessories
Supplied: CD containing user manual & Wave-X software, null modem serial
interface cable, power cord
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