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Model 1331A
General
Information
SECTION I
GENERAL INFORMATION
1-1.
INTRODUCT
ION.
1-2. This manual provides operating
and
servicing
information for the Hewlett-Packard Model 1331A
X-Y Display
(figure
1-1). The manual is divided into
eight sections, each covering a
specific topic or
as-
pect
of
the instrument. All schematics
are
lQcated at
the
rear
of the
manual
and can
be unfolded and
used
for
reference
while reading
any
part of
the
manual.
1-3. This section
contains
a description of Model
1331A. The instrument specifications
are
listed in
table 1-1. Table 1-3 lists
and
describes the abbre-
viations used
everywhere
in this manual except in
Section VI. The parts list in Section VI is a com-
puter printout
and
uses
computer-supplied
abbrevia-
tions. Special
accessories are
listed in this section.
Standard
options available
for this
instrument
are
listed
and
described in Section VIL
1-4. DESCRIPTI ON.
1-5.
Model
1331A
has been designed
for
general-
purpose X-Y
storage and system
monitoring. It
can
display
digital
or analog computer-processed
data or
real time information. Its high frequency response
makes
it
useful
as a
read-out device in the following
applications: graphic
and
alphanumeric
displays,
nuclear
spectrometer,
semiconductor curve tracer,
swept-frequency
measurements, frequency ratios,
phase shift measurements, raster
displays,
and ampli-
tude versus time displays.
1-6. Identical X
and
Y amplifiers provide storage
monitor displays with bandwidths up to 1 MHz. Re-
fresh memory requirements
are
minimized by the
mesh type
storage CRT.
1-7.
All
controls
required to
compensate
for spot
deflection
and
dot writing
speed are
located on the
front panel. These include
FOCUS,
INTENSITY,
PER-
SISTENCE,
mode (WRITE,
and
STORE), POSITION
controls, and ERASE.
1-8.
Model 1331A writes and
stores shades
of gray
which
adds a
third dimension to the display. Spot
blanking
is obtained
with-IV.
Maximum brightness
is
obtained
with
+
1
V. In-between voltages provide
shades of
gray.
1-9. Model
1331A
is proportioned
to
permit mount-
ing
two instruments
(any
HP
1330/
1331-series instru-
ments) side-by-side
in a
standard
19-inch
rack. Refer
to
the
paragraph on
available accessories
in this
section
for
a
description of a
suitable
rack adapter.
1-10.
CATHODE-RAY TUBE.
1-11. Model 1331A uses a post-accelerator storage
CRT
with
a 10.5
kV
accelerating
potential
and
alum-
inized P31 phosphor. The
8
x 10 division internal
graticule
is located
on
the same plane
as
the display
to
eliminate
parallax
errors.
The mesh type storage
used
eliminates
the need for memory devices to con-
stantly
refresh the display. Refer to table 1-1 for
complete
CRT specifications.
1-12. WARRANTY.
1-13. The instrument (except the CRT) is certified
and
warranted
as
stated on the inside front cover
of
this manual. The
CRT
is covered by a separate
warranty. The
CRT
warranty and warranty claim
form
is located
at
the rear of this manual. Should
the
CRT fail
within the time specified on the CRT
warranty page, complete
the warranty claim form
and
return
it with
the
defective CRT. The procedure for
returning a
defective
CRT
is described
on
the CRT
warranty page.
The warranty may be void for instru-
ments having
a
mutilated
serial
number
tag.
1-14. AVAILABLE ACCESSORIES.
1-15. Accessories available for use with Model 1331A
are
listed in table 1-2. Hewlett-Packard a lso has
a
wide range of test equipment
and
accessories suit-
able
for use with HP instruments and instruments
of other
manufacturers. Refer to the latest HP
Catalog
or request
information from the nearest HP
Sales/
Service
Office.
1-16.
INSTRUMENT AND MANUAL IDEN-
TIFICATION.
1-17. This manual applies directly to Model 1331
instruments with
a serial
prefix number
as
listed
on the
manual
title
page.
The
serial
prefix number
is the first group of digits in the instrument serial
number
(figure
1-2). The instrument serial number
is
on
a tag located on the rear panel.
1-1
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