Metric Halo SpectraFoo - Manual (Page 58)

The Transfer Function
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Figure 4.4: Transfer Function after the measurement has been time-aligned
• The Power vs Frequency graph shows the amplitude difference between the source and response signals
as a function of frequency. A trace oriented on the zero line indicates that the source and response
signals are the same. For the frequencies where the trace is above zero, the response signal has more
power than the source. For the frequencies where the trace is below zero, the response has less power
than the source.
• The Phase vs Frequency graph shows the relative phase of the source and response signals as a function
of frequency. A trace oriented on the zero line indicates that the signals are in phase. For frequencies
where the trace is above zero, the source is delayed from the response by the indicated number of
degrees. For frequencies where the trace is below zero, the response is delayed from the source by the
indicated number of degrees.
The parameter controls for the Transfer Function are accessible from within the Controls window of the Transfer
Function. This is consistent with the operation of all other SpectraFoo instruments. The Transfer Function
Controls window is accessed by clicking on the show details button in the Transfer Function window or in the
Master Controls window. In addition, the Transfer Function now has a solo button and an on/off button.
Transfer Function Controls
You control the display and behavior of the transfer function window with the Transfer Function Controls
window: