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Model 11869A
General Information
1-11.
INSTRUMENTS COVERED BY THE MANUAL
1-12.
Attached to the side panel of the 11869A is a serial number
plate similar to the one shown in Figure 1—2. The serial number is in
two parts, a prefix and a suffix. The first four digits and the
letter comprise the serial number prefix. The prefix is the same for
all identical instruments;
it is changed only when the instrument is
modified. However, the numbers in the suffix are sequential,
regardless of changes in the prefix. The suffix is different for each
instrument. This Manual applies to instruments having the serial
number prefix given under SERIAL NUMBERS on the title page.
SERIAL NUMBER
f
--*".
>
PREFIX SUFFIX
,
_
_ ■*■■■■
SER
1234A 12345
OPT
HEWLETT • PACKARD
MADE IN USA
Figure 1-2.
Typical Serial Number Plate
1-13.
An instrument manufactured after the printing of this Manual
might have a serial number prefix that is not given on the title
page. This unlisted serial prefix indicates that the instrument is
different from that described in the Manual. The Manual for this
newer instrument will be accompanied by a yellow Manual Changes
Supplement, which contains information explaining how to adapt the
Manual for a newer instrument.
1-14.
In addition to change information, the Supplement might
contain information for correcting errors in the Manual. Such
11 errata15
information applies to all serial numbers.
1-15.
To keep this Manual as current and accurate as possible,
Hewlett-Packard recommends that you periodically request the latest
Manual Changes Supplement. The Supplement for this Manual is
identified with the print date and part number of the Manual, both of
which appear on the title page of the Manual. Complimentary copies of
the Supplement are available from Hewlett-Packard. For information
concerning a serial number prefix that is not given on the title page
or in the Manual Changes Supplement, contact your nearest
Hewlett-Packard Office.
1-5
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