Specifications

User Manual 301/302

The last example (Figure 19g) above is the most complex to be

discussed here. Here, 100 cycles of sinewave are amplitude

modulated with 10 cycles of sine wave with a modulation depth of

20%. To achieve this, the upper and lower sidebands are defined

separately and added to the fundamental or carrier. The upper

sideband is produced by the expression 100*cos(110*omg*t) and the

lower sideband by the term 100*cos(90*omg*t).

Using Previously

Saved Waveforms

to Generate

Arbitrary

Waveforms

Waveforms saved previously can be re-used and resent to the

301/302. To save or open a waveform, use the “waveform” selection

from the file menu, and select “save as” or “open” as appropriate. See

Figure 3.20 below.

Using the “save” or “open” options from the file menu saves or opens

complete instrument set-ups rather than just waveform data.

Figure 3.20 opening or saving waveforms

Using Files From

Other

Applications to

Generate

Waveforms

Any application which can generate data that can be saved as a .csv

or .asc file can be used to build waveform data. For example, data

from Microsoft Excel speadsheets or Matlab simulations can all be

used as sources of waveform data. To import data use waveform

open as above, then select the relevant file extension of the file to be

imported on the file type dropdown menu (see Figure 3.21 below).

Data used must have a record length which is a multiple of 8.

Configuring The Instrument