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User Manual 301/302

What Are

Arbitrary

Waveforms?

Arbitrary waveforms are generated from digital data points, which are

stored in memory. Each data point has a vertical resolution of 12 bits

(4096 points), i.e., each sample is placed on the vertical axis with a

precision of 1/4096.

The Model 301/302 has the following waveform memory capacity:

4 Meg – standard memory configuration

16 Meg optional memory expansion

Each horizontal point has a unique address - the first being 00000 and

the last depends on the memory option. In cases where smaller

waveform lengths are required, the waveform memory can be divided

into smaller segments. Then it is possible to select which segment is

sampled, how many times and in what sequence.

When the instrument is programmed to output arbitrary waveforms,

the clock samples the data points (one at a time) from address 0 to

the last address. The rate at which each sample is replayed is defined

by the sample clock rate parameter. The Model 301/302 provides

programmable sample clock rates from 100 mSa/s to 300 MSa/s.

The Arbitrary Waveform Control Panel (figure 3-14) in WaveWiz

allows adjustment of arbitrary waveforms.

Figure 3.14 WaveWiz Arbitrary Waveform Control Panel

Unlike the built-in standard waveforms, arbitrary waveforms must first

be loaded into the instrument's memory. Correct memory

management is required for best utilization of the arbitrary memory.

An explanation of how to manage the arbitrary waveform memory is

Configuring the Instrument

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