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Section I
Paragraphs 1-6 to 1-24
1-6.
The horizontal
amplifier
has
a direct-coupled
bandwidth of dc to 5 MHz.
The ac-coupled bandwidth
is 5 Hz to 5 MHz.
With a dynamic range of +5 volts,
the
amplifier
has front-panel
selectable
deflection
ranges of 1 v/div, 0. 2 v/div and 0. 1 v/div.
A vernier
controlprovides continuous adjustment between ranges.
A magnified sweep accuracy of +5% is maintained at -
selectable magnifications of X1, X5 or X10; and a front
panel BNC connector permits the use of external de-
flection signals.
The external input has an input im-
pedance of 1 megohm shunted by approximately 30 pf.
1-7.
A rear panel BNC connector is provided for ex-
ternal control of CRT blanking.
A signal of approxi-
mately 42v from de to 15 MHz will blanka
trace of
normal intensity.
The input resistance is 5100 ohms.
1-8.
External outputs are provided through four rear
panel mounted
BNC
connectors
for coupling plug-in
derived
signals to external
equipment.
Since these
outputs are dependent upon the plug-ins utilized,
the
'appropriate
plug-in
Operating
and Service
Manual
should be referred
to for identification of the output
signals available.
The
output amplifiers can supply
3ma, andwill drive impedances as low as 1000 ohms
without distortion,
1-9.
A 1kHz square wave signal is available at the
front panelfor calibration purposes.
Its amplitude of
10 volts peak-to-peakis accurate to +1%, and it has a
rise time of less than3u
sec.
The signal may be used
to adjust horizontal and vertical deflection factors and
to compensate divider probes.
. 1-10. CATHODE
RAY TUBE.
'1-11, The Model 181A/AR uses an internal graticule,
P31 aluminized phosphor CRT.
Special internal ele-
ments
provide the variable
persistence
and storage
features.
Parallax
observation
error
is eliminated
by use of the internalgraticule, and a non-glare safety
face plate is bonded to the CRT.
1-12. WARRANTY.
1-13. This
instrument
is certified
and warranted as
described
on the inside front cover
of this manual.
The CRT is covered by a warranty separate from the
rest of the instrument.
The CRT warranty and war-
ranty claim forms are located at the rear of this manual.
Should the CRT fail within the time specified on the
warranty,
contact your
nearest
hp Sales/Service
Office,
and return the CRT
with the warranty form
completed.
i
1-14. ACCESSORIES FURNISHED.
1-15. The standard Model
181A/AR Oscilloscope is
supplied
with a mesh contrast filter, and a detachable
Model 181A /AR
power
cord.
Also
included with the Model
181AR is
a rack mounting kit.
1-16. ACCESSORIES AVAILABLE.
1-17. A mobile test stand for the cabinet Model
181A
is available.
The Model 1118A Testmobile provides
adjustable
height,
tilt,and rotation.
Equipped with
locking wheels, itis readily collapsible for transport.
Anadapter assembly, available as hp Part No. 01119-
69501,
permits
the rack Model 181AR to be mounted
on the Model 1119A Testmobile.
|
1-18. A front panel cover of fiberglass material,
hp
Model 10166A, can beusedto provide front panel pro-
tection for the cabinet
Model 181A, and a cover for
the rack
Model
181AR
is available as hp Part No.
5060-0437,
1-18, For ease
of calibration and maintenance an hp
Model 10407A. Plug-in Extender
can be obtained.
It
provides
for removal
of the plug-ins from the main
frame and exposes components and adjustments.
1-20. Cameras,
probes, viewing hoods,
terminations
and other accessory items are available for special-
izedrequirements.
Informationonthese andthe above
described accessories may be obtainedfrom hp Sales/
Service Offices listed in the rear of this manual.
1-21. INSTRUMENT IDENTIFICATION.
1-22. Hewlett-Packarduses atwo-section, eight-digit
serial number to identify instruments.
The first three
digits (precedingthe dash) are the serial prefix which
identifies a series of instruments;
the last five digits
identify a particular
instrument
in the series.
The
serial number appears on a plate located on the rear
panel.
All correspondence
with a Hewlett-Packard
Sales/Service Office inregardto an instrument should
reference the complete serial number.
1-23. SCOPE OF MANUAL.
1-24. This manual provides operating and service in-
formation for the hp Model
181A/AR
Oscilloscope.
Information
and operation of plug-ins
is contained in
appropriate
plug-in
manuals.
Information
in
this
manual
applies directly to instruments (as manufac-
tured) with serial numbers prefixed by the three digits
indicated on the title page.
If the serial prefix of the
instrument is different from that on the title page,
a
"Manual
Changes" sheet supplied,
or Section
VII of
this manual, will describe changes which will adapt
this manual to provide correct coverage.
"Technical
corrections
(if any)
to this manual,
due
to known
errors
in print,
are called Errata and are shown on
the change sheet.
For information on manual cover-
age of any hpinstrument,
contact the nearest hp Sales/
Service
Office
(addresses
are
listed at the rear
of
this manual).
02612-2
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