Fluke 284-U 115V Calibration Instruments
  • Fluke 284-U 115V Calibration Instruments

Fluke 284-U 115V


Four-Channel Arbitrary Waveform Generator, 40 MS/s



The Fluke 284-U 115V Four-Channel Arbitrary Waveform Generator, 40 MS/s is a highly sophisticated 12-bit arbitrary waveform generator capable of recreating virtually any waveform. True variable clock architecture is used with clock speeds between 0.1 Hz 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 K to 64 K points.

Arbitrary waveforms may be replayed at a specified waveform frequency, period or sample clock rate.

Function Generator

Each channel can operate as a full DDS function generator. High quality sine, cosine, haversine, havercosine and square waves are available between 1 mHz and 16 MHz. Triangle, ramp and sine(x)/x waveforms are available from 0.1 mHz up to 500 kHz.

Pulse Generator

Each channel can not only generate pulses, but also 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.

Waveform Creation and Editing

Waveform creation and editing features are incorporated within the instrument. These include waveform insert, point edit, line draw, amplitude adjust and invert.

A wide range of standard waveforms are available for insertion within an arbitrary waveform. Sections of existing arbitrary waveforms can also be inserted. For more sophisticated waveform creation and editing, Waveform Manager Plus software for the Windows operating system is provided.

Waveforms created on a PC can be downloaded to the instrument via the digital interfaces (or memory card where fitted).

GPIB, RS-232

The 284-U 115V incorporates both RS-232 and GPIB (IEEE-488) interfaces as standard. These can be used for loading arbitrary waveforms and for the remote control of all of the instrument functions.

Waveform sequencing The variable clock architecture of the 284-U 115V enables waveforms to be sequenced. Up to 16 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, multiple segments from multiple channels can be used to create highly complex waveforms.

Wide Range Sweep

All waveforms can be swept over their full frequency range at a rate variable between milliseconds and 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 284-U 115V 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.

Fast and Easy to Use

All of the main information is clearly displayed on a backlit 80 character LCD. Eight soft keys enable fast data editing. Parameters can be entered directly from the numeric keypad or changed with the spin wheel. On the 4-channel models, a Copy Channel key enables similar setups to be created across multiple channels with ease.

Multi-Channel Phase Locking

Any number of channels can be phase locked with offsets defined to a resolution of 0.1° (or 360°/waveform points for arbitrary waveforms). For applications requiring more than four channels, multiple generators can be phase locked.

The 284-U 115V has the facility for phase synchonising to another similar 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, such as noise superimposition, to be created.

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, many segments from different channels can be used to generate the final waveform. A channel can be used to AM modulate or SCM modulate another channel.

Digital Modulation

Inter-channel modulation and summing allows the simulation of various telecom digital modulation systems.

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