Atec Wavetek-295, Wavetek-296 User Manual
Models 296 and 295
50 MS/s Synthesized Multichannel Arbitrary
Waveform Generators
◆
Up to 4 Independent Channels
◆
10 Standard Functions (sine to 20 MHz,
square to 25 MHz)
◆
Up to 50 MS/s Sampling with 12-Bit
Vertical Resolution
◆
Waveform Sequencing of up to 4,096
Segments (Model 296 only)
◆
Frequency Control of Individual Sequence
Segments (Model 296 only)
◆
16-Bit Digital Output to 50 MS/s (Model
296 only)
◆
Optional 100 Vpp Output
◆
Versatile Interchannel Triggering,
Summing and Phase Control
◆
Frequency Sweep
◆
Amplitude and Suppressed Carrier
Modulation
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Graphical User Interface
◆
Front Panel Waveform Creation/Editing
Tools
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Floppy Disk Drive
◆
GPIB and RS-232 Interfaces
◆
Compatible with Waveform DSP
◆
SCPI Compatible
odels 296 and 295 combine sophisticated performance with ease of use in
M
a way previously not available in
arbitrary waveform generators. Model 295 is
the basic model. Model 296 adds advanced
waveform sequencing capability up to
4,096 waveform segments for complex
waveform generation. It also provides a 16
bit digital output on each channel.
Both models can contain up to four
separate channels. When run independently,
each channel is essentially a stand-alone
arbitrary waveform generator. When in
master/slave mode, phase relationships
between channels can be set by the user.
Each channel outputs 15 Vp-p (into 50 Ω
load) at 50 MS/s sampling frequency
maximum or can output 100 volts peak-topeak when Option 007 is installed. Each
channel has a high-speed clock output that
runs at a maximum of 100 MHz.
Arbitrary waveforms can be created and
stored to nonvolatile RAM or on the
standard MS-DOS™ compatible 3.5-inch,
high-density disk drive. In addition, ten
commonly used synthesized functions are
built in.
The graphic user interface greatly
simplifies creating and editing waveforms,
which can be viewed on an oscilloscope. A
mouse (provided) is used to draw on a scope
when creating waveforms and to make
selections on the graphical interface when
setting up the instrument.
Arbitrary waveforms may be created from
the front panel using the mouse and any of
four modes: free hand, line draw, line list,
and mathematical expressions. In addition,
extensive waveform editing tools enable the
user to control waveform shapes precisely.
The editing tools make it easy to modify
existing waveforms. This is particularly
useful in such applications as characterization testing. For instance, amplitude may be
modified continually in order to characterize
performance of the unit under test. For more
complex applications, waveform linking,
looping and sequencing allow users to create
long, complex waveforms.
Versatile interchannel capabilities are
provided. An internal summing bus allows
waveforms from multiple channels to be
summed together. Other interchannel
capabilities include setting phase shift
between channels, linking waveforms
together and triggering one channel from
another.
Waveforms, sequences, and entire
instrument set-ups can be stored in the
internal nonvolatile 60 kB RAM or on disk
via the disk drive.
It’s Easy to Create Any Waveform. Models
296 and 295 take the limits off your ability to
simulate the signals you are faced with in the
real world.
Built-in features make interactive
control of complex waveforms and instrument set-up simple. Waveforms can be
created, copied, edited, downloaded, and
sequenced, all with a few clicks of the
mouse. The 296 and 295 provide a complete
set of tools that enables you to specify all
kinds of waveforms in a number of ways,
from precise mathematical description to
“what-if” freehand sketching. And modifying waveforms is a snap with tools such as
Vertical Resize and Vertical Move. The
sophisticated user interface gives you access
to all the power of the 296 and 295, with a
flexibility in waveform creation never before
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Model 296
Typical math expression screen.
Amplitude modulated signal generated by the
expression shown on the math expression
screen above.
available.
An internal memory of 60 kB is provided
for storing the waveforms you create. Storing
waveforms created or captured elsewhere is
no problem either. Simply download
waveforms over the GPIB or RS-232
interface or through the standard 3.5-in disk
drive. You can download waveforms
generated in Wavetek’s WaveForm DSP
arbitrary waveform creation software or
directly from a DSO (with Option 005). Or
use the disk drive to load ASCII files
generated from spreadsheet programs such
®
as Microsoft Excel
®
.
Pro
or Borland’s Quattro
Use Math Expressions. You can create
waveforms with mathematical precision by
entering math expressions using the
numerical keys on the front panel.
Use Line Draw/Line List and Freehand
Draw. For waveforms with straight lines, as in
pulse or digital applications, Line Draw
allows you to use the mouse to draw the
lines on an oscilloscope. Lines may also be
created using Line List, which allows you to
enter the vertices of each line with ampli-
Scope Edit screen.
Scope shows waveforms created with Line
Draw/Line List (top) and Freehand Draw
(bottom).
tude and time value. For other kinds of
applications, Freehand Draw gives the
flexibility of using the mouse to draw a
waveform on the oscilloscope in much the
same way as with a pencil on paper. This
makes tasks like inserting spikes on
waveforms easy.
Sum Multiple Channels to Create Complex
Waveforms. With the internal analog
sumbus, you can sum waveforms from two
channels together and output the sum as a
complex or modulated waveform. The
optional high voltage and external summing
module allows three channels and an
external signal to be summed.
Create Long, Complex Waveforms with
Linked Sequence Operation. Up to 4,096
waveforms can be linked together with the
Model 296. Up to 4 waveforms can be
linked together with the Model 295. Loop
count and advance conditions for each
waveform are user programmable.
Trigger Operation. Each channel has its
own internal trigger generator and external
trigger input. Multiple channel triggering
and versatile interchannel triggering are also
Summing screen.
Scope illustrates summing. Top: Clean square
wave. Middle: Noise. Bottom: Summed
waveform (square wave with noise).
provided.
More Tools Make Editing Easy. Models
296 and 295 give you easy ways to modify
waveforms you’ve created. For example, you
can copy and insert portions of existing
waveforms, move individual waveform
points, and increase or decrease the
amplitude of all or part of the waveform.
Digital Output (296 only). Each channel
provides a 16-bit digital output programmable to 50 MHz.
Specifications
NOTE: Specifications apply after a 20-minute warm-up.
Standard Waveforms
Sine, square, triangle, pseudo-random noise,
positive ramp, negative ramp, positive haversine,
negative haversine, sin x/x and DC.
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