General Information
Model 8642A/B
1-11. HOW TO USE THE RECOMMENDED TEST EQUIPMENT TABLE
Table 1-3 (page 1-15) lists the test equipment required for testing, adjusting, and servicing the
Signal Generator. The critical specification column describes the essential requirements for each
piece of test equipment. Other equipment can be substituted if it meets or exceeds these critical
specifications.
Alternate models are suggested in Table 1-4 on page 1-16. Some reasons for recommending an
alternate model might be its HP-IB compatibility or its ability to replace two or more single
models.
1-12. INSTRUMENTS COVERED BY THIS MANUAL
Serial Numbers. Attached to the instrument is a serial-number plate. The serial number is in
the form: 0OO0A000OO. The first four digits and the letter are the serial prefix. The last five
digits form the suffix that is unique to each instrument. The contents of this manual apply
directly to instruments having the same serial prefix(es) as those listed at the beginning of
Volume I.
Manual Updates. An instrument manufactured after the printing of this manual may have a
serial prefix that is not listed at the beginning of Volume I. An unlisted serial prefix number
indicates that the instrument differs in some way from those documented in this manual.
A "MANUAL UPDATES" packet is shipped with the manual when necessary to provide you with
the most current information available at the time of shipment. These packets consist of
replacement and addition pages which should be incorporated into the manual to bring it up to
date.
Hewlett-Packard offers a Documentation Update Service that will provide you with further
updates as they become available.
If you operate or service instruments of different serial prefixes, we strongly recommend that
you join this service immediately to ensure that your manual is kept current. For more
information refer to the Documentation Update Service reply card included with this manual or
contact:
Hewlett-Packard Company
Spokane Division
Technical Writing Department
24001 E. Mission -- TAF C-34
Spokane, WA 99220
(509) 922-4001
1-6
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