Agilent Technologies 89410A Operator's Manual page 231

What Makes this Analyzer Different?
Signal flow diagram
A more complete block diagram shows the complex local oscillator which allows the
analyzer to use complex time analysis for phase, demodulation, and other time-related
measurements. The 89441A consists of the RF section (bottom box) and IF section (top
box). The IF section is the 89410A.
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