vii
Preface
This manual provides operating, programming, and assembly-level
service infor mat ion for the HP 5071A Primary Frequency Standard
Telecommunications options.

How to Use This Manual

Telecommunications option information is presented as changes,
additions, and deletions to the material covered in the HP 5071A
Operating and Programming and Assembly-Level Service manuals.
The information appe ars in sequential order of occ urrence
corresponding to the subject headings that are affected by the options.
Each occurrence of telecommunications option information uses the
following presentation for mat :
Except for the rear -panel illustration in chapter 1 of the HP 5071A
Operating and Programming manual and Figure 2-1, all changes and
corrections to manual illustratio n s app ear as desc riptive text items
that convey new, changed, or deleted information about the artwork.
The structure of topics covered corresponds to the outlines of the
HP 5071A Operating and Programming and Assembly-Level Service
manual except for specif ications which occupies its own chapt er. (See
manual organization belo w.)

Instrument Identification

Instrument identification is made from the serial number located on
the rear panel of the HP 5071A. Agil ent uses a two-p art serial number
with the first part (prefix) identifying a series of instruments and the
second part (suffix) identifying a particular instrument within a series.
An Agilent assigned alpha char acter between the prefix and suffix
identifies the country in which the instrument was manufactured.
Sub j ec t he adin g(s): a. Left-justified option designation where:
Option 048 = 48 Vdc power option, and
Any TCO Option = Telecommunications
output optio ns 104, 105, 220, 221, 222, 270,
271, or 272.
b. Text information explanation for
either HP 5071A manual, and/or,
c. Corre cted text inform ation for the
cited subject heading(s)