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Model 1821A
Section VII
Paragraphs
7-1
to
7-8
SECTION
VII
MANUAL
CHANGES
AND
OPTIONS
7-1.
MANUAL
CHANGES.
7-2.
This
manual
applies directly
to
the
Model
182
lA
Time
Base and
Delay Generator
(as
manufactured)
with serials
prefixed 809-
.
The
following
paragraphs
explain
how
to
adapt
this
manual
to
apply
to
newer
in-
struments
(higher serial prefix) or older
instruments
(lower serial
prefix).
Technical corrections
to this
manual
(if
any)
are
called
errata and
are
listed
on
a
separate
"Manual Changes"
sheet supplied with
this
manual.
7-3.
NEWER
INSTRUMENTS.
If
the serial
prefix
ofyourModel 1821Aisabove
809-, refer
to
a separate
"Manual Changes"
sheet supplied with
this
manual.
Locate
the serial prefix
of
your instrument and
make
the indicated
changes.
7-4.
OLDER
INSTRUMENTS.
If
the serial
prefix
of
your Model 1821A
is
below
809-,
operating,
service
and adjustment information
is
contained
in
a previous
editionof
this
manual. Contactyour nearest
HP
Sales/
Service
Office
to
obtain
data applicable
to
your
instru-
ment,
and be sure
to
refer
to
the serial
prefix
of
your
instrument.
7-5.
OPTIONS.
7-6.
Options are standard modifications
performed
on hp instruments
at
the factory.
No
options for the
Model
1821
A
are
offered
at
the
present
time.
7-7
SPECIAL INSTRUMENTS.
7-8
.
Special
instruments are standard hp instruments
that
are modified
at
the
factory
according
to
customer
specifications.
These
instruments are
identified
by
a tag adjacent
to
the serial
number
tag.
A
separate
insert sheet
is
included
in
the
manual
for
each
special
instrument
that
has been modified
in
a
manner
that
effects the
replaceable parts
list.
Change
the
manual
according
to
the insert
sheet
for
proper instrument
coverage.
02591-4
7-1/7-2
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