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Getting Started
HP 70428A Microwave Source Module Overview
HP 70428A Microwave Source Module Overview
The HP 70428A Microwave Source Module outputs a signal between
2.4
GHz and 26.4 GHz, in 600 MHz steps, at levels from 0 dBm up to +16 dBm
(+10 dBm above 7.2 GHz).
The signal is derived from a 600 MHz oscillator which either free-runs or is
phase-locked to a reference chain. The reference chain consists of a 100
MHz oscillator which can be the reference or it can be phased-locked to a 10
MHz crystal controlled reference. The reference chain's tuning sensitivity
and phase-lock-loop bandwidths can be selected from menus on the MMS
display. A voltage applied to the VOLTAGE CONTROL connector can
tune the reference chain.
A step-recovery-diode multiplies the 600 MHz and a YIG-tuned-filter (YTF)
picks off the desired frequency.
The output of the YTF is amplified by a gain adjustable amplifier. This
amplifier has two operating modes that can be set with softkeys. One mode
is for minimum noise, and the other lowers high order harmonics.
Figure 2-27
HP 70428A Microwave Source Module Diagram
2-26 HP 70427A/HP 70428A User's Guide
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