China Electronics Technology Instruments AV3672 Series, User Manual

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Appendix
Appendix 6 Mixer Measurement
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Fig. 7.15 Intermodulation Spectrum Track (lower figure) Frequency Sweep Intermodulation Distortion Track
(upper figure)
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The upper figure of Fig. 7.15 shows the intermodulation distortion measurement window, in which the sweep
range is 2GHz-3GHz, the sound span is fixed, and the center frequency of the double-tone sound is 2.5GHz.
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The lower figure of Fig. 7.15 shows the intermodulation measurement window. The receiver settings of the
intermodulation spectrum channel are mainly used to measure the main sound signals and three-order, five-
order and seven-order intermodulation products.
2. Step Mode : refer to the mode for intermodulation distortion channel tracking of the digital intermodulation
spectrum measurement, when the tracking function is enabled.
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Automatic step : automatically trace the frequency of the current data point of the IMD channel at the
double-tone signal frequency of intermodulation spectrum measurement.
After each spectrum
measurement, the frequency of the double-tone signal will be automatically set as the frequency of next data
point of the IMD channel.
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Manual step : if this option is selected, the double-tone frequency of intermodulation spectrum
measurement will be the same as the frequency of the specified data point of the IMD channel (the
number of points is specified by the user).