78 U8903A User’s Guide
4 Audio Generator Functions
DFD waveform
The DFD waveforms are similar to SMPTE IMD, except that
the two tones have equal amplitude and are spaced closer
together. There are two predefined DFD dual tones
consisting of DFD IEC 60268 and DFD IEC 60118.
The following figure shows the DFD IEC 60118 waveform
menu.
Figure 4-10 DFD IEC 60118 waveform menu
The DFD IEC 60118 waveform may be configured with the
following parameters.
• Difference Frequency
• Upper Frequency
• Amplitude
• DC Offset
Amplitude refers to the amplitude of the composite signal.
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