Audio Generator Functions
4
Keysight U8903A User’s Guide
101
SMPTE IMD waveform
There are three predefined SMPTE IMD dual sine waveforms comprising SMPTE
IMD 1:1, 4:1, and 10:1. They conform to the SMPTE standard RP120-1983 for
testing intermodulation distortion. The SMPTE IMD waveforms consist of a lower
and an upper frequency sine waveform, at default values of 60 Hz and 7 kHz
respectively. They are differentiated by the amplitude ratio between the lower and
upper frequencies.
The following figure shows the SMPTE IMD waveform menu.
Figure 4-9
SMPTE IMD waveform menu
The SMPTE IMD waveform may be configured with the following parameters.
– Upper Frequency
– Lower Frequency
– Amplitude
– DC Offset
Amplitude refers to the amplitude of the composite signal.
Содержание U8903A
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