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Chapter 4 169
Making Measurements
Using Baseband I/Q Inputs (Option B7C)
Spectrum (Frequency Domain) Measurement
There are two new views with Baseband I/Q input Spectrum
measurements: the Spectrum view with 0 Hz center frequency, and the
Spectrum Linear view with 0 Hz center frequency and the vertical scale
in Volts.
If you have
I only or Q Only selected as the Input Port, a Spectrum view
does not have 0 Hz as the center frequency. It is displayed with 0 Hz at
the left margin, similar to a conventional spectrum display, except that
the start frequency remains 0 Hz regardless of
Span, and the center
frequency is displayed as half the
Span.
Figure 4-18 Basic Mode Spectrum View- Baseband I/Q Inputs