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The Fluke 280 Series universal
waveform generators combine many generators in one instrument. Their
extensive signal simulation capabilities include arbitrary
waveforms, function generator, pulse/pulse train generator, sweep
generator, trigger generator, tone generator, and amplitude
modulation source.
The 281, 282, and 284 Waveform Generators use Direct Digital
Synthesis techniques as well as variable clock sampling technology
to provide a fully featured programmable function and arbitrary
waveform capability. The 281, 282 and 284 are 40 MS/s arbitrary
waveform generators with one, two, and four channels, respectively.
Waveform Manager Plus Software provides all the features needed for
creation, manipulation and management of arbitrary waveforms within
a single Windows-based program.
Single or multiple channels:
The 28x series comprises a single channel model (281), two channel
(282) and 4 channel (284). Each channel can be operated fully
independently, or multiple channels can be linked using simple or
complex relationships.
Versatile pulse generator capabilities:
Each channel can generate not just pulses but complex pulse trains.
A pattern of up to 10 pulses can be quickly defined with each pulse
having its own amplitude, width and delay. The whole pulse train
pattern can then be replayed at a user defined repetition rate.
Where variable rise time pulses are required, the full arbitrary
function can be used.
Arbitrary capability unmatched at this price:
The 280 series are highly sophisticated 12-bit arbitrary generators
capable of recreating virtually any waveform. True variable clock
architecture is used with clock speeds between 0.1Hz and 40 MHz.
This architecture avoids the clock jitter associated with DDS
arbitrary generators and permits waveform linking, looping and
sequencing. Waveforms may be defined with up to 4096 vertical points
and from 4 to 65,536 horizontal points. Arbitrary waveforms may be
replayed at a specified waveform frequency, period or sample rate.
Up to 100 user-defined waveforms can be stored within the
instrument's 256K of nonvolatile memory.
Linked-sequence operation:
Up to sixteen arbitrary waveforms may be linked in a sequence. Each
waveform can have a loop count of up to 32,768 and the whole
sequence can be run continuously or repeated more than a million
times. For multi-channel models, waveforms on different channels can
be 'daisy chained' and looped. By summing the channel outputs, up to
64 segments can be used to create highly complex waveforms.
Multi-channel phase locking:
Any number of channels can be phase locked with offsets defined to a
resolution of 0.1 degree (or 360 degrees/waveform points for
arbitrary waveforms). For applications requiring more than four
channels, multiple generators can be phase locked. The 280 series
also has the facility for phase locking to another generator.
Multi-channel Summing:
Waveform Summing sums the waveform from any channel into the next
channel. Alternatively any number of channels can be summed with an
external signal. This permits complex modulations to be created such
as noise superimposition.
Inter-channel triggering and modulation:
Because any channel can be triggered by the previous or next
channel, waveforms on different channels can be 'daisy chained' and
looped. By summing the channel outputs, up to 64 segments can be
used (32 segments for 282). A channel can be used to AM modulate or
SCM modulate another channel.
Wide frequency sweep range:
All waveforms can be swept over their full frequency range at a rate
variable between 30 milliseconds and 15 minutes. Sweep can be linear
or logarithmic, single or continuous. Single sweeps can be triggered
from the front panel, the trigger input, or the digital interfaces.
Multiple channels can be swept simultaneously.
Amplitude modulation:
Amplitude Modulation and Suppressed Carrier Modulation are available
for all waveforms. Any channel can be used to modulate another
channel. Alternatively all channels can be modulated simultaneously
via the modulation input.
Built-in trigger generator:
All waveforms are available as a triggered burst whereby each
trigger edge will produce one burst of the carrier. Start and stop
phase is fully variable. Both Triggered and Gated modes can be
operated from the internal trigger generator, from an adjacent
channel, an external source or a key press or remote command. The
trigger generator signal is available as a separate output if
required.
Tone switching:
The Fluke 280 series can provide triggered switching between up to
16 frequencies of standard or arbitrary waveforms. Tone switching
modes can be gated, triggered or FSK using any trigger source. By
summing two channels together it is possible to generate precise
DTMF test signals.
Windows based waveform editing:
Each generator is supplied complete with sophisticated Windows based
software for the creation, editing and management of waveforms. This
powerful software can be used to create arbitrary waveforms from
scratch using drawing tools, equations or both together. Real-world
waveforms imported from DSOs or other sources can be modified and
combined with other waveforms using editing functions. A library of
'standard' waveforms is included which can be used as 'elements'
when creating or modifying waveforms. A powerful Equation Editor
provides an array of mathematical functions including logarithmic
and geometric operands. Waveform creation and editing can make use
of drawing tools in combination with equations, insertion and
manipulation. Multiple waveforms can be further combined using
mathematical operators to create new waveforms.
Import from DSOs and other instruments:
The Windows software incorporates direct support for uploading
waveforms from Tektronix digital oscilloscopes. A driver for
LabWindows CVI from National Instruments is available which enables
imports from other equipment to be achieved within the LabWindows
environment. |
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