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Characterization of Frequency
            Agile Sources

                   Rex Chappell
                Santa Clara Division




   RF & Microwave
   Measurement
   Symposium
   and
   Exhibition

    FliDW   HEWLETT
    ~~ PACKARD




                   www.HPARCHIVE.com
                                                ABSTRACT:


This paper describes techniques for testing fast-switching frequency-agile sources, such as frequency hopping
radios and synthesizers. Using the new HP 5371A Frequency and Time Interval Analyzer, dynamic, at-speed
testing of these devices is now possible. Single-pass characterization techniques for five important device
parameters will be discussed; 1) hopping sequency analysis, 2) switching transient analysis, 3) settling time
verification, 4) hopping frequency distribution, and 5) carrier modulation analysis.


                                                 AUTHOR:

Rex Chappell, Product Marketing Engineer for Universal Counters, Santa Clara Division, BSEE, San Jose
State, 1970. With HP since 1973 in various marketing positions: RSE, Product Support, European Sales
Development Engineer, Logic Test PME, and Universal Counters PME since 1985.




                                                   www.HPARCHIVEcom
, , , - - - - - - - - - - - - - - - - - - - - - -.....
                                                  ""        This paper will cover new techniques and tools for char-
                                                            acterizing frequency-agile source parameters that were
                                                            previously difficult or impossible to quantify.


           Characterization of
        Frequency Agile Sources

                      Rex Chappell
                   Santa Clara Division




                                                                For the purposes of this paper, a frequency-agile source
                                                                will be dermed as a source that changes its output fre-
                       Agile Carrier                            quency in a serial way with time. An example is a veo
                                                                that is driven by a series of voltage steps.
                           Time Dom"i

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