Preface
xiv
Instruments Covered by This manual
This manual applies directly to Symmetricom 5071A Primary Frequency
Standards that have the same serial number prefix(es) shown on the title
page. If the serial number prefix of your Standard differs from that listed on
the title page of this manual, then there may be differences between this
manual and your instrument. Instruments having a higher serial prefix are
covered when required by one or more manual-change sheets included with
this manual. If a required change sheet is missing, contact Symmetricom by
phone or email using the information provided at the back of this manual.
Manual Organization
This assembly-level service manual consists of a table of contents,
preface, Six chapters and an index. The page running headers identify the
chapters and sections of this manual. The chapter contents are
summarized as follows:
Chapter 1, Performance Tests, provides test procedures to ensure
that the Standard meets all warranted specifications.
Chapter 2, Service, is divided into five sections. Section 1 contains
instructions for returning the Standard to Symmetricom for
service. Section 2 contains pre-troubleshooting information
and Sections 3, 4, and 5 provide the diagnostic
troubleshooting-tree procedures (diagnostic trees) to isolate
faulty assemblies and/or modules.
Chapter 3, Theory of Operation, provides two levels of hardware
functional description based on a signal-flow block-diagram
perspective.
Chapter 4, Replacing Assemblies, contains procedures for replacing
defective assemblies and/or modules in the instrument.
Chapter 5, Replaceable Parts, lists the replaceable parts inside the
Standard and explains how to order them from Symmetricom.
Chapter 6, Specifications, This information is duplicated in the 5071A
Operating and Programming manual P/N 05071-90041, and is
therefore not printed in this manual.
How to Order Manuals
A copy of this manual (part number 05071-90040) can be downloaded from
the following website:
http://www.symmttm.com/products_pfr_5071A.asp
The Symmetricom 5071A Operating and Programming manual (part number
05071-90041) can be obtained from the same site as well.
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