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HEWLETT
PACKARD
INDEX BY INSTRUMENT TYPE AND FUNCTION
Oscilloscopes-DC to 1 0 M C
lnstrument P r i m a r y User Characteristics Price Page
-hp- 130A General laboratory and production testing Dc t o 300 KC-High sensitivity 650.00 8, 9
-hp- 150A General laboratory high frequency and TV work Dc t o MC-Plug-in vertical amplifiers 1100.00 IO,
-hp- 151A H i g h sensitivity-Plug-in for 150A Dc t o MC-High sensitivity 200.00
- -hp- 152A Dual Trace-Plug-in for 150A
--I_--
Dc t o MC-Presents two phenomena for
simultaneous viewing
250.00
---
i
200AB Audio tests 20 cps t o 40 K C I v I $130.00 16, 18
-hp- 200CD Subsonic through supersonic audio and 5 cps t o 600 K C 160.00 16, 18
ultrasonic tests
-hp- 200J Interpolation, frequency measurements 6 cps t o 6 KC 160 mw/lO v 275.00 17, 18
-hp- 200T Telemetry, carrier current tests 160 mw or IO v/600 ohms: 350.00 18
Vacuum Tube Voltmeters-IO cps to 700 M C
-hp- 400AB General purpose ac
measurements
i o cps to 600 KC i v 1 5200.00 42
W i d e range ac measurements cps t o 4 M C 10 megohms 225.00 40, 41
-hp- 400D H i g h sensitivity 15 p p f shunt
-hp- 400H H i g h accuracy wide 10 CPS t o 4 M C 10 megohms 325.00
range ac measurements 15 ppf shunt
Audio, rf, VHF measurements: 0.1 t o 300 V Dc-I22 megohms.
-hp- 410B ac-20 cpr to 700 MC
dc voltages; resistances 7 ranges lac-IO megohms/l.5 44, 45 i
Voltmeter Accessories
Extend usefulness of -hp- Models 400AB, D, H o r 410B voltmeters
Instrument Features Price Page
-hp- 452A Capacitive Voltage Divider For a11 -hp- ac VTVM. 25 cps t o 20 MC. Division 1OOO:l floo.oo 46
-hp- 452-95A Adapter Connects -hp- 452A t o -hp- 410B VTVM probe 10.00 46
-hp- 453A Capacitive Voltage Divider For -hp- 410B VTVM only. Division 25.00 46
454A Capacitive Voltage Divider I
I
For -hp- 400D and 400H only. Division 25.00 46
For -hp- 410B VTVM. Measures voltages between conductor 35.00
-hp- 455A Probe Coaxial "T" Connector and sheath o f 50 ohm transmission line.
Frequency Measuring, M o n i t o r i n gEquipment
measuremen
Distortion, W a v e Form Analyzers - 2 0 cps to 2 0 KC
Square W a v e and Pulse Generators
mounted Instrument available for $15.00 less. Rack mounted instrument available for $25.00 less.
-hp. 6230 5,925 t o 7,725 M C Output 70 t o 0.223 v into 50 ohm load. FM o r square wave modulation. ,750.00 88, 89
Separate power meter and wave meter section.
-hp- 624C 8,500 t o 10,000 M C Output 3.0 pv t o 0.223 v into 50 ohm load. Pulse, FM or square wave 2,265.00A 88, 89
modulation. Separate power meter and wave meter section.
Output IO d b m t o -90 dbm. Pulse, FM, or square wave
- h p 626A IO t o 15.5 K M C modulation. Direct calibration. 3,250.00 90, 91
Output IO d b m t o -90 dbm. Pulse, FM, o r square wave
- h p 628A 15 t o 21 K M C modulation. Direct calibration. 3,000.00 90, 91
Swept Frequency Oscillators
-
.hp- 670SM 2.6 t o 4 K M C Automatic adjustable motor-driven sweep, 1,175.00 with motor 92, 93
-hp- 670GM 4 to 6 K M C full frequency band coverage, output 1,175.00 with motor 92, 93
-hp- 670JM 5.85 t o 8.2 K M C IO mw full range, full modulation I,175.00 with motor 92, 93 .
-hp- 670HM 7 t o IO K M C capabilities, direct-reading frequency dial. 1,175.00 with motor 92, 93
Electronically swept: variable sweep
-hp- 686A 8.2 t o 12.4 K M C width and rate. Output IO mw t o 0. 2,250.00 94, 95
Pulse, square wave, FM and A M modulation.
.
Other Instruments and Accessories
'f.0.b. Palo Alto, Calif. Quantity discount quotations available from the factory. A Rack mounted Instrument available for $15.00 less.
t For use with barretter or crystal. F o r use with barretter only. 'Complete assembly including carriage. Mounts in 809B Carriage.
Includes Thermistor, installed. **J530A, 5.85 to 8.2 KMC, $120; J530B, 5.20 to 7.05 KMC, $150 Includes barretter; checked for square law characteristics.
Microwave Test Instruments -for coaxial and waveguide systems
7 to 12.4 K M C
Rack mounted instrument available for $15.00 less. Copyright 1957 Hewlett-Packard CO.-Printed in U. S. A . 4 0 0 0 3-57 7 M
5
--
Data subject t o change without notice. Prices f.0.b. factory. Registered Trademark of the Hewlett-Packard Company.
ELECTRONICSTRUMENTS
. SUGGESTIONS FOR ORDERING
Order by Model Number Sales Representatives
Always order by catalog model number and Sales representatives are maintained in principal
name of instrument desired. For example, "Model cities as a service to our customers. Customers are
400D Vacuum T u b e Voltmeter." Whenever pos- invited to contact the nearest representatives at
sible mention frequency range or other significant any time. T h e y will gladly supply technical infor-
specifications to prevent misunderstanding. Also mation, help prepare your order and, if desired,
mention features such as special color, non-standard forward order to the factory. Orders should be
power line voltage, etc., and whether cabinet or made out to the Hewlett-Packard Company and
rack mounting style is desired. are subject to final acceptance by the Company in
Palo Alto. Sales representatives and their addresses
Most Hewlett-Packard instruments are avail- are shown in the back of this catalog.
able in either cabinet or rack mounting. T h e letter
"R" after the model number indicates rack mount- Repairs
ing. For example, "400DR." An additional charge W h e n returning instruments for repairs, recali-
is made for most rack mounting style instruments. bration, o r any other reason, please contact the
Orders should be sent direct to the factory and Hewlett-Packard Company for shipping instruc-
addressed to Hewlett - Packard Company, 275 tions. Give model number, type number, and serial
Page Mill Road, Palo Alto, California. All orders number and as much information as possible con-
are subject to final acceptance by the Hewlett- cerning reason for return.
Packard Company. Repairs are made by the Hewlett-Packard Com-
pany a t cost of labor and materials plus a small
service charge. Customers are invited to make full
Shipments
use of this service to insure maximum benefit from
Unless specifically requested otherwise, ship- their instruments. I n most cases instrument repairs
ments are made by express or by truck, whichever can be made locally at field repair stations main-
is cheaper and more serviceable to the customer. tained by our representatives in Boston, Chicago,
Small items will be forwarded by parcel post. For Dallas, Detroit, Los Angeles, N e w York, Phila-
expedited service, we will gladly ship by air freight, delphia, Syracuse and Washington, D. C.
air express (more expensive), or air parcel post
Repair Parts
upon request.
When ordering repair parts please describe care-
fully parts required. Give model number, type
Terms number, serial number of the instrument and date
30 days net. Unless credit has already been es- of origjgh purchase when known. Identify parts
tablished, shipments will be made c.o.d. All prices by schematic diagram circuit reference and by -hp-
are quoted f.o.b. Palo Alto. stock number, if possible.
ELECTRONIC STRUMENTS
TO COMMUNICATE WITH TO COMMUNICATE WITH
HEWLETT- PACKARD -hp- ENGINEER-SALESMEN
Mail: 275 Page Mill Road, Palo Alto, -hp- engineer salesmen are located in most major
California, U. S. A. manufacturing centers in the United States and
Telephone: DAvenport 5-4451, Palo Alto. Canada, and in principal cities overseas. Names
TWX: Palo Alto, Cal. 02. and addresses of domestic and foreign representa- +
Cable: "HEIVPACK". tives are listed in the back of this catalog.
WHERE TO FIND THE -hp- INSTRUMENTS YOU NEED
IN THIS CATALOG
By instrument type o r function: Ordering information:
All -hp- instruments shown in this catalog are in- Essential ordering information, terms and shipping
dexed by type or function in the tables at the be- and repair data are listed on the p$evious page.
ginning of the catalog. (Example-"Vacuum
T u b e Voltmeters.") Prices:
Prices of major -hp- instruments (cabinet models)
By instrument name o r title: are listed on individual pages and also in the tables
a t the beginning of the catalog. Prices of certain
All -hp- instruments shown in this catalog are in-
small components and accessories are listed on pages
dexed by name or title at the back of the catalog.
where such equipment is catalogued. Prices are sub-
(Examples--"Amplifier" ; "Audio Oscillator.")
ject to change without notice, and are f.0.b. factory.
By instrument model number: Warranty:
-hp- instruments are also listed numerically (by All -hp- instruments are warranted free from de-
model number) at the back of this catalog. ( E x - fects in materials and workmanship. For details
ample--"-hp- 410B Vacuum T u b e Voltmeter.") see page 933.
ABOUT HEWLETT- PACKARD
T h e Hewlett-Packard Company was founded in 1939 in
Palo Alto, California. Here, in a suburban community 30 miles south of San Francisco,
next door to Stanford University, Hewlett-Packard is squarely in the heart of the
important northern California electronics center.
T h e first Hewlett-Packard product was a new kind of instrument-a resistance
capacity audio oscillator. Hewlett-Packard pioneered the resistance capacity circuit
which is now an accepted standard for test oscillator design.
During the past 18 years, the Company has steadily broadened the instrument
line, and now over 300 basic test instruments are manufactured. Among the more
important types are oscilloscopes, audio oscillators, vacuum tube voltmeters, noise and
distortion analyzers, signal generators, power meters, electronic counters and a complete
array of waveguide and coaxial instrumentation for microwave work. T h e Company
is now beginning construction of a totally new plant of six principal buildings on a 40-
acre site just south of Palo Alto, California. These buildings will provide a laboratory,
manufacturing and research area of over half a million square feet. Approximately 1,300
men and women are now regularly employed, and over 150 field representatives sell
and service -hp- instruments in the United States, Canada and overseas.
Behind every -hp- instrument is a basic philosophy governing equipment design,
manufacture, sales and service. T h i s philosophy specifies that there shall be built into
each -hp- instrument the greatest possible usefulness, accuracy, convenience, depend-
ability and dollar value.
Consistently, Hewlett-Packard has gone to lengths to insure that these standards
are met. Every effort has been made to assemble the best engineering staff possible. T h e
Company has sought not only men of skill and experience, but men with vision and
daring and a desire to better the best.
Ultra-modern design features the Hewlett-Packard plants. All
buildings are sound and light engineered and air conditioned.
T h e plants include one of t h m o s t complete instrument develop-
ment laboratories in the world, as well as high-efficiency facilities
for manufacture, quality control, service and administration.
4
Another cornerstone of the -hp- philosophy is insistence on the most up-to-date
manufacturing methods. T h i s means not only modern techniques, but modern machin-
ery. Hewlett-Packard's manufacturing departments are equipped with the newest and
finest machinery obtainable for the job. Typical of this equipment is a specialized turret
I @
press which punches many sizes of perforations on instrument chassis with a single setup.
Other examples include a heavy duty die casting machine for fast production of dial
drive housings and other stationary parts, a fully-equipped machine shop for manufacture
of precision mechanical parts, and a complete plastic molding department to fabricate
special components which are either unobtainable elsewhere, or can be made more quickly
and economically at -hp-.
,
I n addition to the different types of commercial machinery, a number of special
devices developed by -hp- engineers are in daily use. Some of these were developed to
1 meet unusual manufacturing problems; others were "imagineered" to make some special
part better, faster, or a t lower cost. T h e y include such ingeniously simple units as the
Lazy Susans, turntables mounting many resistor boards in a convenient position for
assembly. And they include developments which are precision machines in their own
right, such as the Kingman machine which stamps out terminal boards in gross
quantities.
` The -hp- plant is equipped with the most T h e ingenuity of -hp- engineers has produced T h e new -hp- laboratory provides engineers
modern manufacturing machinery avail- many devices to speed and simplify manufac- with the most ideal working conditions pos-
`a or the job. Here is a heavy duty die
g machine for production of hous-
mgs, shields, dials and other cast parts.
turing, produce better instruments a t J_ess
cost. T h i s precision lathe for winding re-
sistors handles wire as fine as No. 42.
sible. Note semi-private work benches, gen-
erous aisle space, large number of power out-
lets and individual power controls.
5
T h e Hewlett-Packard production policy is also somewhat different from that
employed elsewhere. Instruments are manufactured in "runs," and actual fabrication
is preceded by careful planning to insure that all parts are available and supplied as
At Palo Alto, home of Stanford Uni-
versity, -hp- is located in the heart of
:he nation's new electronics center on
the San Francisco Peninsula. T h e
.hp- plant may be reached by South-
2rn Pacific commuter train ( t o South
Palo Alto station), by Greyhound
bus, or auto on U. S. 101. San Fran-
isco's International Airport is just
30 minutes drive.
needed to keep the runs progressing smoothly. As many as thirty runs are normally
in progress simultaneously, yet production schedules are kept flexible to permit meeting
special orders or unusual delivery requirements involving substantial numbers of
instruments.
I n sales and service, Hewlett-Packard makes a particular effort to provide cus-
tomers with every assistance that will make the use of -hp- instruments more efficient
and productive. Factory-trained field engineering representatives provide prompt, on-
the-job consultation as well as operating and repair information. These men are con-
stantly supplied with the latest in technical data and measurement technique, and are
in almost daily contact with the plant at Palo Alto. For one week of each year, the
entire sales organization meets a t Palo Alto for an extensive new-information and re-
training seminar which includes not only theory but actual "field problem" measuring
with -hp- instruments and allied equipment. O n many additional occasions, -hp- repre-
sentatives return to the plant for special training or instruction on new instruments
and measuring methods.
I n electronics, special or unusual parts are T h e Kingnznn Machine, above, is another Another unit typical of the modern mal
often hard to find, or prohibitive in cost. T o device born and built at -hp- to make possible chinery in daily use a t -hp- is this
avoid this roadblock to progress, -hp- has its faster manufacturing at low-eYcost. Named press, a precision equipment
own plastics and molding shop, which turns for the -hp- engineer who "imagineered" it, punches many sizes of perforati
out knobs, escutcheons, Nylon gears, etc. it mass-produces terminal boards. instrument chassis with a single se
6
An equally significant part of the annual instruction given -hp- engineer repre-
sentatives involves field servicing -hp- equipment. T h i s is an important function of the
modern -hp- service policy described on a preceding page of this catalog.
Old and new. Pictured at left are
two -hp- audio oscillators-the very
f i r s t i n s t r u m e n t ( l e f t ) a n d the
brand-new Model 200AB oscilla-
tor. T h e -hp- line now includes 12
descendants of the original oscil-
lator which was the first low cost
oscillator employing the resistance
capacity circuit.
In addition to rigid standards of instrument quality, the best engineering and
manufacturing possible, and thorough field engineering service, there is one more aspect
of Hewlett-Packard which deserves mention here.
T
hrough the years, there has come into being a definite attitude on the part of
-hp- people toward the development, manufacture and service of -hp- instruments. T h i s
attitude is best described as a genuine and pervasive team spirit, a spirit of cooperation
coupled with a common desire to excel. -hp- people are proud of the quality and the
utility of the instruments they design, make and sell. T h i s spirit translates itself con-
tinuously into better engineering, better manufacturing, and better service.
T h e net result to you is good instruments-the best possible, with broadest appli-
cability and the lowest price consistent with quality. Dependable instruments that are
not only the best dollar value when purchased, but the best investment for the future.
-hp- instruments- the standard of the electronic test equipment field.
Frequently, members of the world-wide -hp- field organization return to Palo Alto to
learn the newest developments in instruments and the latest in measuring technique. I n
addition, all return again to the -hp- plant for a week-long annual semhar devoted to
the operation and application of -hp- instruments.
7
1 3 0 A L O W FREQUENCY OSCILLOSCOPE
Most Dependable Oscilloscope
Advantages: Offered Com mercial ly
Extreme operating dependability at last is a new kind of oscilloscope-actually
Brilliant, high resolution trace H ERE
the first commercial instrument to combine three
basic features you want most-broad usefulness, simple
Automatic triggering system
operation, and the degree of dependability you expect from
Sensitivity 1 mv per centimeter
time-tested -hp- instruments. -he- 130A provides each of
High gain, balanced input these advantages, and sets new standards for oscilloscope-
2 1 calibrated sweeps ; direct reading usefulness, simplicity and reliability.
W i d e pass band, dc to 300 KC Covering frequencies from dc to 300 K C , -hp- 130A is
Similar X and Y amplifiers a versatile, all-purpose tool for laboratory, production line
Twist-off bezel ; easy CRT change and industrial processing measurements. I n addition to its
High stability, unique versatility versatility as an oscilloscope, -hp- 130A can be used as a
millivoltmeter or voltmeter.
Etched, unitized circuits
Simple operation is an outstanding characteristic of the
new instrument. Controls are at a minimum, are color-
Uses:
coded to front panel markings and are arranged by func-
Provides new convenience in evaluating complex tion. 21 sweep times may be directly set on the panel con-
voltages. Particularly ideal for measuring me- trol ; no arithmetic or interpolation is required to determine
chanical quantities through a transducer such sweep settjngs. Horizontal sweeps are calibrated from 1
as complex voltages, stress, strain and vibra- psec/cm to 5 sec/cm. Accuracy is within 5776, and sweeps
tion, pressure, displacement and acceleration. are highly linear.
8
Automatic Triggering Specifications
Sweep
T w o novel circuit features contribute to the instru-
ment's unique operating convenience. First, the oscilloscope Range: 1 psec/cm to approximately 15 sec/cm.
Calibrated: 21 calibrated sweeps in 1-2-5-10 sequence,
accepts signals direct from conventional transducers with- 1 psec/cm to 5 sec/cm. Accuracy within 5 % .
out preamplification in the majority of cases. Findings are Vernier: Permits continuous adjustment of sweep time.
presented in a brilliant, high resolution trace visible under Triggering: Internally, line voltage, or externally with
all lighting conditions. Second, the instruments contain a 0.5 v or more.
"universal" automatic triggering system. Under almost all Trigger Point: Any positive or negative level on the posi-
tive or negative slope of the signal triggering the
circumstances, one single preset condition provides opti- sweep. +30 to -30 volt range for external trigger.
mum triggering. T h e sweep may be operated free-running Preset Triggering: Switch position on sweep mode con-
when it is desired to determine the base line. A high degree trol automatically selects optimum setting for stable
of stability and freedom from horizontal jitter is main- triggering.
tained under all sweep conditions. Input Amplifiers
Vertical and horizontal amplifiers have same character-
Similar X, Y Amplifiers istics.
Sensitivity Range: 1 mv/cm to 50 v/cm.
Horizontal and vertical amplifiers are similar, and pro- Common M o d e Rejection: Balanced input only. Rejec-
vide high sensitivity of 1 mv/cm or 10 mv full scale tion greater than 40 db. Common mode signal must
deflection. T h e amplifiers have wide pass bands from dc to not exceed 1.5 volts.
Input Attenuator: 14 calibrated ranges, in a 1-2-5-10
300 KC, and offer balanced input circuits on the five most sequence, 1 mv/cm to 20 v/cm. Vernier permits con-
sensitive ranges. (These circuits are particularly useful in tinuous adjustment between ranges.
industrial, medical and similar applications where it is Pass Band: dc to 300 KC, independent of attenuator
more convenient to accept a low level balanced signal setting.
Coupling: ac or dc.
direct from a transducer.) T h e amplifiers also provide
Balanced Input: On 1, 2, 5 , 10 and 20 mv/cm ranges.
single ended input, and may be either ac or dc coupled. Input impedance 2 megohms shunted with 25 ppf.
Single Ended Input: O n all ranges. Input impedance 1
Use as Voltmeter megohm shunted with 50 ppf.
Undistorted Deflection: T h r e e screen diameters.
Both amplifiers on the -hp- 130A are highly stable, re- Amditude Calibrator: Fixrd amplitude, accuracy within
quiring virtually no adjustment during operation. Their 5 %. Approximately 1 KC square wave.
gain may be standardized by an internal 1,000 cycle 120 General
millivolt source. These features, together with the instru- Illuminated Graticule: Edge lighted graticule with con-
ment's precision input attenuator, make possible use of the trolled illumination, 10 cm x 10 cm, marked in centi-
oscilloscope as a millivoltmeter or voltmeter accurate within meter squares with 2 mm subdivisions on major hori-
zontal and vertical axes.
5%. CRT Bezel: CRT bezel readily removed by a 15' twist,
Quick C R T Interchange providing rapid means of changing filters and replac-
ing cathode ray tube if different phosphors are re-
-hp- 130A is arranged physically for maximum conveni- quired. Bezel locks to provide firm mount for standard
ence in use. I n addition to concentric, color-coded controls, oscilloscope camera equipmen5
a tilt bail is provided to raise the instrument to a suitable
CRT Plates: Direct connection to deflecting plates via
terminals through rear access door.
viewing angle. T h e C R T bezel removes instantly with 15' Intensity Modulation: Terminals on rear; 20 v positive
rotation, simplifying changing of tubes and filters. T h e signal blanks CRT at normal intensity.
bezel also provides a firm mount for standard oscilloscope Cathode Ray Tube: Five inch mono-accelerator flat face
camera equipment. An alignment lever provides quick and type 5AQP with 3,000 volt accelerating potential.
Available with P1, P7, or P11 screen.
direct orientation of the C R T trace with the graticule. Size: Height-15"; Depth-21 g''.
Weight: N e t 39 Ibs. Shipping 55 Ibs.
Etched Circuitry Power Supply: 115/230 volts + l o % , 50/1000 cycles,
approximately 175 watts.
Electrically and electronically, the design of Model Filter: Color of filter compatible with screen phosphor.
130A is highly conservative. Components are operated well Accessories Available: -hp- AC-83A Viewing Hood,
$4.50; AC-16A Cable Assembly, $4.00; AC-16B
below ratings. Etched circuitry is used extensively to sta- Cable Assembly, $4.25.
bilize capacities and increase operating dependability and Price: $650.00. (Normally supplied with P1 screen.
accessibility. T h e entire instrument is broken down into W h e n ordering with P7 screen, specify 130A-7. W h e n
several sub-assemblies, each functionally integral and read- orderifig with P11 screen, specify 130A-11.)
ily reachable for servicing. Data subject t o change without notice.
9
1 5 0 A HIGH FREQUENCY OSCILLOSCOPE
Advantages: Setting New Standards of
Maximum usefulness, reliability Osci Iloscope Dependability !
Brilliant, full screen high resolution trace
usefulness, convenience, and utmost electri-
No halo or bloom effect
Leading edge of signal always visible M AXIMUAI
cal and mechanical dependability-these were the
objectives in designing the new -hg- 150A Oscilloscope.
5-inch flat face C R T
24 direct reading calibrated sweeps T h e result is a high frequency instrument which answers
Automatic sweep triggering more laboratory and production problems more conveni-
0.25 psec distortionless delay line ently than previous equipment, and is the industry's most
Calibrated horizontal amplifier outstanding oscilloscope value.
Plug-in vertical pre-amplifiers, single or dual trace For maximum usefulness, -hp- 150A is designed for,
New pen-sized low capacity probe operation with plug-in vertical amplifiers. Currently, these
Sweep magnification of 5, 10, 50 and 100 x include -hp- 151A, a high gain unit with 5.0 mv/cm maxi-
Single shot sweep with lock-out mum sensitivity and frequency response from dc to 10 MC;
Twist-off bezel ; CRT access door and -hp- 152A, a dual amplifier permitting two phenomena
Quick CRT interchange to be presented on the CRT simultaneously. Either of -hp-
Etched circuits, unitized construction 152A's dual amplifiers may be used separately. For dual
Color-coded, concentric controls, simplified and trace presentation, an electronic switch applies amplifier
functionally grouped outputs to alternate traces, or switches outputs at a 100
KC rate.
Uses: 0.25 Microsecond Delay Line
General purpose laboratory instrument for fast T h e oscilloscope's vertical amplifier provides excellent
circuit work in pulse applications such as transient response and less than 0.035 psec rise time; the
radar, T V , nucleonics and guidance systems. - dc
pass band is*`- to IO MC. A distortionless 0.25 psec delay
Presents the ultimate in waveform observa- line permits viewing the leading edge of the signal trigger-
tion and complex voltage measurement. ing the sweep, and requires no adjustment. A single, direct
IO
reading front panel control selects any of 24 calibrated quency Oscilloscope. T h e probe is also available separately
sweep times. No calculation or interpolation is required. at $25.00.
Sweep times are accurate within 3% and cover the range Etched Circuits
0.02 psec/cm to 5 sec/cm. T h e sweep may be triggered by Every possible step has been taken to insure the mechan-
internal or external voltage, or may be free running. T r i g - ical and electrical convenience and reliability of -kp- 150A
gering may be accomplished on positive or negative slopes Oscilloscope. Controls are simplified, direct reading, con-
and at positive or negative voltages of f 3 0 to -30 v. centric, color-coded and arranged logically by function.
Sweep Magnification Tubes and circuits are grouped on hinged panels that
Jlodel 150A's horizontal amplifier provides sweep mag- swing out for simplified testing. Wherever possible, circuits
nification of 5, 10, 50 and 100 times, and a multi-turn are etched and unitized and may be isolated from the in-
positioning control providfs a fine degree of horizontal ad- strument by unplugging. Etched circuits are mounted on
justment so that any 10 cm portion of the magnified scale translucent plastic for "look-through" convenience. A 15'
may be examined. Indicating lamps show when the mag- turn removes the bezel, facilitating filter and C R T inter-
nification circuit is in use, or when a combination of sweep change. A door on the cabinet top gives direct access to
time and magnification exceeds the fastest calibrated sweep C R T terminals, and a lever inside permits the CRT trace
time. T h e horizontal amplifier, which has a separate input, to be aligned with the graticule. T h e instrument includes a
also includes a calibrated input attenuator, and has a masi- large, high volume cooling fan with renewable air filter.
mum sensitivity of 200 mv/cm over a pass band from dc to All components are of highest quality obtainable. Model
more than 500 KC. 150A is housed in a lightweight, streamlined metal cabinet
T w o special features of -hp- 150A add much to the in- equipped with leather carrying straps and a tilt bail for con-
strument's convenience and versatility. O n e is the auto- venient viewing.
matic triggering circuit by which one single preset adjust- Unitized Circuits
ment establishes optiiiium triggering f o r almost all condi- T h e unitized construction illustrated below is a new
tions and eliminates most adjustment during or even before concept in oscilloscope design. Basic circuit elements are
Itzeasureitzent. T h e other feature is the single shot sweep etched or assembled as separate units; circuits may be dis-
circuit. After firing, this circuit remains locked out until connected without soldering, merely by unplugging. Tubes
rearmed manually or electronically. A light indicates when are instantly accessible on swing-out panels.
the circuit is armed.
-hp- A C - P I A Low Capacity Probe
Custom engineered for use with -hp- 150A High Fre-
quency Oscilloscope, Model AC-21A pictured below is a
highly convenient, pen-sized probe offering a 10 :1 voltage
division, 10 megohm impedance and only 10 ppf capacity.
Compensating capacity is easily adjustable by rotating one
portion of the nylon barrel. T h e probe is equipped with
miniature alligator jaws and has a grounding clip with
flexible lead, also fitted with alligator jaws. Model AC-
21A is supplied as an accessory with -hp- 150A High Fre-
Specifications
-hp- 150A
Sweep
Range: 0.02 psec/cm to 15 sec/cm.
Calibrated: 24 calibrated sweeps in 1, 2, 5 and 10 se-
quence, 0.1 psec/cm to 5 sec/cm. Accuracy within
370.
VernierQermits continuous adjustment of sweep time.
Triggering: Internally, line voltage ; externally with 0.5
v or more.
Trigger Point: Any positive or negative level on positive CRT Plates: Direct connection to deflecting plates via
o r negative slope of signal triggering sweep. f30 v to terminals in access compartment.
-30 v range for external trigger. Intensity Modulation: Terminals provided ; 20 v positive
signal blanks C R T at normal intensity.
Preset Triggering: Switch position on sweep mode con-
Power Supply: 115/230 v *lo%, 50/60 cycles. Ap-
trol automatically selects optimum setting for stable proximately 500 watts.
triggering for majority of conditions.
Cathode Ray Tube: 5AMP mono-accelerator flat face
Single Sweep: Sweep circuits may be set for triggered type with 5,000 v accelerating potential. Available
single sweep operation. After being triggered, sweep with P I , P2, P7 or P 1 1 screen.
remains locked out until reset. Indicator light glows Size: Width-13g"; Height-17g"; Depth-25".
when sweep is armed. Weight: N e t 65 Ibs. Shipping 105 Ibs. (includes one
plug-in unit).
Accessories Furnished: 2 - A C - 2 1 A Low Capacity
Horizontal Amplifier Probes. 2-AC-76A B N C to binding post adapters.
Sweep Magnification: Sweep may be expanded 5 , 10,50 Accessories Available: AC-21A Low Capacity Probes
or 100 times. Multiturn horizontal positioning control (specify grey or black lead), $25.00; AC-76A B N C
provides a fine degree of adjustment, permits viewing Male to Binding Post Adapter, $5.00; AC-83A
Viewing Hood, $4.50; AC-16A Cable Assembly,
any 10 cm portion of expanded sweep. $4.00; AC-16B Cable Assembly, $4.25 ; AC-16K
Indicators: "Reminder" lights glow when sweep magni- Cable Assembly, $5.00.
fier is used, or when expanded sweep time exceeds Price: $1,100.00. (Normally suppIied with P 2 screen.
fastest calibrated sweep time. For P 1 screen, specify 150A-1 ; for P7 screen, specify
150A-7; for P 1 1 screen, specify 150A-11.)
500 KC. Sensitivity
External Input: Pass band dc to over
range 200 mv/cm to 25 v/cm. Five calibrated ranges -hp- 151A High Gain Amplifier
plus vernier.
Sensitivity Range: 5 mv/cm to 50 v/cm.
0.5, 1, 2 and
Input Attenuator: 12 calibrated ranges, in
Vertical Amplifier 5 sequence, from 5 mv/cm to 20 v/cm. Vernier per-
mits continuous adjustment between ranges.
Main Vertical Amplifier: Pass band dc to more than 10
MC. Optimum transient response and rise time less Input Impedance: 1 megohm shunted with 50 ppf.
than 0.035 psec. Pass Band: dc to 10 MC, 0.035 psec rise time.
Coupling: ac or dc.
Signal Delay: 0.25 psec delay permits viewing leading
edge of signal triggering sweep. Dual Inputs: T w o signal inputs with T y p e B N C . Selec-
tion of either input by panel switch.
Input: Through plug-in preamplifier. Weight: N e t 10 Ibs.
Price: $200.00.
General
Amplitude Calibrator: 18 Calibrating voltages in 2, 5 , -hp- 1 5 2 A Dual Channel Amplifier
10 sequence, 0.2 mv to 100 v peak-to-peak, are avail- 0.05 v/cm to 50 v/cm.
Sensitivity Range:
u
`
able a t a binding post to provide maximum flexibility. Input Attenuator:9 calibrated ranges, in 1, 2, 5 and 10
Accuracy within 3%. Approximately 1 KC square sequence, from 0.05 v/cm to 20 v/cm. Vernier per-"-
wave with rise and decay times less than 1 psec. mits continuous adjustment between ranges.
Input Impedance: 1 megohm shunted with 50 ppf.
Sawtooth Output: +20 to -20 v sawtooth waveform
of sweep. Pass Band: dc to 10 MC, 0.035 psec rise time.
Coupling: ac or dc.
G a t e Output: +20 v signal for duration of sweep.
Electronic Switching: By alternate sweeps or chopped
Illuminated Graticule: Edge-lighted graticule with con- a t approximately 100 KC.
trolled illumination, marked in centimeter squares Vertical Positioning: Individually adjustable.
with 2 mm subdivisions on major horizontal and ver- Polarity of Presentation: Input signal as applied or in-
tical axes. verted.
CRT Bezel: CRT bezel readily removable by a 15' twist, Input Connectors: T y p e B N C both channels.
providing rapid means of changing filters and replac- Weight: Net 10 Ibs.
ing CRT if different phosphors are required. Bezel Price: [email protected].
locks to provide firm mount for standard oscilloscope
camera equipment. Data subject t o change without notice.
12
OSCILLATORS
OSCILLATORS are among the most signed to operate over wide frequency cps and over 1 MC. T h e low frequency
basic and useful of all electrical ranges and to provide generous output limit is set by the ballast element.
and electronic measuring instruments. voltages. Others are designed for par- T h e thermal time-constant of the lamp
T h e y provide a convenient source of ticular applications. (ballast element) is such that a t lower
power or test voltage for almost all T h e circuit of the -hp- RC oscillator frequencies, lamp resistance tends to
measurements, including frequency, is shown in Figure 1. It is fundamen- change in accordance with the varia-
gain, impedance, distortion, etc. tally a two-stage amplifier having both tions in amplitude of the individual
There are three primary types of negative and positive feedback loops. cycles of operation. T h i s results in se-
oscillators. These may be defined as T h e positive loop, which includes the vere distortion of the output wave-
( 1) Beat-Frequency, ( 2 ) Coil Capaci- f network, causes form. Therefore it is necessary to ( 1 )
tor or LC and ( 3 ) Resistance Capacity the circuit to oscillate. T h e resonant use a ballast element having relatively
or RC oscillators. frequency is given by the expression greater thermal inertia, or ( 2 ) oper-
1 ate the lamp a t a point where radia-
Throughout the years, the RC os- io= T h i s expression shows
2 RC. tion from the lamp is low.
cillator has become recognized as the that the frequency or tuning span can
most versatile, practical, dependable be made as wide as the capacity varia- High Frequency Oscillators
and easiest t o use of a l l oscillator tion in a tuning capacitor. T h u s 1O:l T h e high frequency limit of the
types. Hewlett-Packard pioneered and frequency variations in a single sweep R C oscillator is determined by the
developed the RC oscillator, and is are easily obtained, and a number of plate loading on the second tube of
today the leader and largest manufac-
turer of this superior type of instru-
ment. -hp- RC oscillators are highly
stable, have wide frequency range and
provide operating flexibility which
makes them useful for many different
kinds of measurements. T h e y are ex-
tremely simple to operate and require
no tedious re-setting o r a d j u s t m e n t
d u r i n g operation. T h e y a r e light-
weight, easily portable, and compact
in size to occupy a minimum of bench
space. Dependability of operation is
assured by clean, simple circuitry and Figure I . Basic Circuit, -hp- RC Oscillator.
painstaking construction from quality
components. bands can be used by changing the the oscillator. T h e impedances o f f h e
T h e s e many advantages may be pairs of resistances. T h e negative loop positive and negative feedback loops
compared with the low stability, con- employs a non-linear ballast resistance are in parallel and the combination is
s t a n t need f o r a d j u s t m e n t , n a r r o w R K (usually a lamp), which automat- in parallel with the plate feed resistor
frequency range, inflexibility, large ically adjusts its resistance to compen- for the tube. At high frequencies, the
size and considerable weight of other sate for variations in output amplitude. combination impedance becomes low
oscillator types. This results in very flat frequency re- and reactive, thereby reducing the
sponse and low distortion over the en- gain of the circuit and introducing
T h e -hp- series of oscillators in-
tire range. It also reduces distortion phase shift. As a result, the distortion
cludes 12 separate instruments which
and limits amplitude of oscillations, increases and the errors in calibration
are essentially resistance - capacity os-
insuring a constant and stable output become severe. T o cut down the plate
cillators. Collectively, they operate
over the entire range (Figure 2).
from 0.008 cps to 10 MC, covering the loading effect, the combination imped-
audio, sub-sonic, ultra-sonic and low Low Frequency Oscillators ance is made as high as possible. T h i s
rf regions. A number of these instru- -hp- RC oscillators have F&n de- is achieved partially by reducing the
ments are general-purpose types de- signed to generate frequencies below l capacity of the tuning capacitor, and
13
partially by raising the gain of the of the transfer characteristics of the
second stage (through use of tubes tubes. By a suitable selection of tubes,
with higher transconductance values). distortion in -hp- oscillators is approxi- AUDIO OSULLbTOR
At higher frequencies the reduction mately %. T h e very low distortion
of gain and negative feedback makes obtained is primarily third harmonic. Figure 4. Voltage Divider Circuit.
the oscillator more susceptible to drifts (Second harmonic distortion is mini-
or variations caused by tube aging and mized by adjusting the dc voltages on tory for most applications. Other val-
supply voltage changes. As a result it the tube electrodes so that second har- ues of resistance may be used to ob-
is common practice to operate the cir- monic distortion generated by one tain different voltage divisions but in
cuit from a regulated power supply. tube of the oscillator is partially can- all cases the sum of the divider resist-
Most -hp- oscillators use an output celled by the other tube's transfer ance must equal the rated load in com-
amplifier whose main function is to characteristics. ) For applications re- bination with the input impedance of
isolate the oscillating circuit from the quiring very low distortion, a selective the equipment under test.
"work" circuit. Thus, change in the
amplifier following the oscillator can Accuracy
work circuit does not reflect back to
be used.
the oscillator and alter its amplitude, "Overall accuracy" as applied to a
frequency or distortion characteristics. Hum variable-frequency oscillator is a gen-
H o w e v e r , a unique a r r a n g e m e n t is H u m is defined as alternating cur- eral term including factors such as
used in the -hp- 200CD W i d e Range rents appearing in the output of an inherent circuit stability, mechanical
Oscillator where the output is taken oscillator as a result of power-fre- stability, resettability of the tuning
from push-pull cathode followers di- quency voltages, currents and fields. system, readability of the tuning dial,
rectly to the output transformer. T h e Causes of hum are stray electrostatic dial calibration, component aging,
cathode followers offer a very low im- and magnetic fields, alternating cur- power supply variations and tempera-
p-dance source to the load and thus rent in tube filaments or heaters, and ture changes. Some of these factors
provide effective isolation of the oscil- discrepancies in filtering of power
affect short time stability; others af-
lator section. supplies.
fect long time stability. T h e accuracy
As the output volt-
D I S T O R T I O N A N D AMPLITUDE CHARACTERISTICS specification of w i t h i n 2% usually
O RESISTANCE.CAPACITY O S C l L L A l O R
F
age of the audio oscil-
lator is reduced, the given for RC oscillators includes all
of these factors. (Typical long time
hum voltage tends to
remain constant. A t and short time stability are shown in
7 - - -
- -
l o w e r o u t p u t levels Figures 5 and 6.)
this hum voltage be- Description of -hp- Oscillators
comes quite large rela-
-hp- 200 series Oscillators (see page
tive to the sine wave
16) are designed for general - purpose
o u t p u t voltage. T h i s
applications, such as checking per-
undesirable condition
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