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Downconverter Operation
Millimeter Phase Noise Measurement System Control
Millimeter Phase Noise Measurement System
Control
Overview
This procedure describes how to use the HP 70427A Downconverter
Module and the HP 11970 series harmonic mixer with the HP 3048A or
HP 3047A Phase Noise Measurement Systems. The external harmonic
mixer accepts a signal from 18 GHz to 110 GHz, depending on the mixer's
frequency band, and applies a signal to the downconverter's SIGNAL input
between 5 MHz and 1200 MHz. The downconverter supplies the external
harmonic mixer with mixer bias current and a 2.4 GHz to 6 GHz signal
which the harmonic mixer multiplies internally to produce the mm LO.
Figure 3-6
Millimeter Phase Noise Measurement System Control Connection
Refer to Hewlett-Packard Application Note 385 for information on making
millimeter phase noise measurements and to the harmonic mixer manual for
information on the harmonic mixer.
This procedure can be used for all HP 3048A software versions A.03.00 or
later. The software can be configured for system control of the HP 70427A.
With earlier versions of the software, the HP 70427A must be controlled
manually.
HP 70427A/HP 70428A User's Guide 3-25
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