Chapter 2 41
Basic Operation
Using the Graphical User Interface
5. In the Quick Play section of the user interface, browse and select the desired
multi-tone waveform file for Channel 1 Waveform.
The AWG accepts data formatted as 16-bit signed integers
ignoring the LSB.
NOTE Different waveforms can be loaded into channel 1 and 2, but the length of the
waveforms must be the same.
6. Use the default setting for the Play Mode and Predistortion.
7. Click Play.
For this example, a waveform with five tones was used. The intermodulation
distortion produced by the five tones played back on the N8241A is less than
–60.0 dBc, Figure 2-3, and less than –45.0 dBc on the N8242A, Figure 2-3.
Although the harmonic distortion for the N8241A and N8242A is specified to be
<–65 dBc and <–50 dBc respectively below the total power, the tone power is
determined by the following formula:
Tone Power = Total Power – 10 log 10 (1/N)
where N= number of tones
Five tones reduces the tone power by approximately 7 dB.
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