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VOLUME 13 NUMBER 2 MAY-JUNE 1973
TECHNICAL Although there are many varia- If a manual is well written, organ-
MANUALS - tions, here is an outline of a typi-
cal Hewlett-Packard instrument
ized, page numbered and para-
graph numbered, any desired item
ORGANIZATION manual. can be found in a matter of sec-
Front Matter onds. Try it-it works.
AND USE General Information Another often overlooked item is
Installation the list of figures and tables. In
by Rod Dinkins Operation addition to the use explained
Theory above, they are especially useful
With the advent of increasingly Maintenance for finding tables or illustrations
sophisticated instruments and cir- Parts List that you have previously used but
cuits, technical manuals are be- Schematic Diagrams whose exact location you cannot
coming larger and more complex. recall.
Finding desired information can be M0d.l Sb3A
Tebk of Coniamb
time consuming when you are con- FRONT MATTER
fronted with a 200 page manual T U L E OF CONTENTS
with 30 foldout drawings. A know- Front matter includes the title
M O n
I QENERALINPORW11ON .. .. .
ledge of manual organization and page, table of contents, and lists
content helps considerably in ef- of figures and tables. The title
fectively using a manual. To help page lists the instrument serial pre-
you do a better job of using your fix to which the manual applies,
HP manual, this article will ex- the type of manual (operating,
amine a typical HP technical man- service or both), who published it
ual for an instrument such as a and when, plus an address for
VTVM, electronic counter, oscillo- directing inquiries or requests. The
scope, etc. The Table of Contents is the first place
front matter usually contains state-
to look.
ments of certification, warranty,
and assistance policies. The front matter is the key to
The table of contents and lists of where items are located. It can
figures and tables are extremely save lots of time when searching
helpful because they comprise a for information.
directory to the remaining infor-
mation in the manual. Nearly
every information-type of publica-
tion has an index or table of con-
tents, and it seems to be the least
used portion. See if this story
MANUAL FORMAT sounds familiar. Ever flip through
a large merchandise or radio cata-
Manuals are really written to serve log looking for an item, all the
the needs of several types of read- time being sure you knew where to
ers, such as general readers, opera- locate it, then after much frustra-
%rs, repair and calibration per- tion stumble across the elusive
sonnel, parts stocking personnel, item? So have we all. And yet
tech writers and instructors. Let's we all know that a 10 second look
look at each section of a manual at the table of contents or index
and see how it applies to the vari- would have led us directly to the
ous types of readers. desired page.
Y O U R PRIVATE LINE TO H P C U S T O M E R SERVICE
-- TECHNICA L MA N UAL 0 R GA N IZA TI 0N
THEGENERAL
INFORMATION SECTION
THE OPERATION SECTION details of how the circuits function.
In general, the theory is written at
a technician level to provide infor-
a
As the title indicates, this section mation for servicing equipment.
This section gives an overall sum- is primarily for the operator. Sub- Usually, no attempt is made to dis-
mary of what the instrument does, jects covered include descriptions cuss the design methods or alter-
what it looks like, dimensions and of controls and indicators, and nate designs. Emphasis is placed
weight, what it consists of, acces- step-by-step procedures on how to on how the instrument works,
sories available, options, instru- set up and operate the equipment rather than why it was designed
ment identification, specifications, in each of its modes. The descrip- as it was. Since the theory is us-
and applications. The section us- tions are written from the oper- ually organized in a separate sec-
ually contains just what its title ator's viewpoint. For example, you tion, it can be used when needed
implies - "General" information. may find "The SAMPLE RATE con- and ignored when time does not
As such, it is intended for virtually trol varies the interval between permit detailed reading.
all readers. By reading this first measurements from 5 milliseconds
to 5 seconds," instead of, "The In addition to helping service per-
section, one can quickly determine
SAMPLE RATE control R5 varies sonnel understand the equipment's
the instrument's capabiIities, Iimi-
the bias on Q6 to fire Schmitt trig- operation, the theory is especialJy
tations, and performance charac- useful for training or for designers
teristics. It seldom contains spe- ger Q8, etc." Emphasis is placed
on how the instrument works from who wish to interface with the
cifics such as how to operate, serv- equipment's inputs, outputs, and
ice, or install the unit. The an operating standpoint, not how
the instrument functions from programming functions.
information is intentionally kept
brief and concise to allow all within. Schematics in HP manuals are us-
readers to quickly gain an overall ually printed on a foldout at the
view of the equipment. Readers * . end of the manual. This allows
wanting more detail on any specif- b ' = I
reading any section while referring
ic area can then refer to one of the to the schematics.
4-50 When a carry occurs after successful subtrac-
remaining sections in the manual. tion, DISPLAY and COUNT D pulses a r e generated.
The most significant &glt (MSD) 1s now transferred
from the 2-Register to the buffer storage and Lhs-
play, and the D-Register advanced to D = 1 Each
new DISPLAY pulse will produce a COUNT D pulse
THE INSTALLATION to advance the D-Register, until all l d i g i t s have been
calculatedand &splayed The last &glt will be trans-
ferred a D = 6
SECTION t
Detailed circuit explanation is in the
theory section.
After reading the General section,
the reader may logically be inter-
ested in installation information to The Operating Section gives detailed THE MAINTENANCE
place the equipment in service. procedures for using the instrument. SECTION
This section covers unpacking and
inspection and what to do if the Although this section is primarily
instrument was damaged in ship- for the operator, service personnel The maintenance section is the
ment. Also covered are storage use it to become familiar with "heart" of H P s instrument man-
and shipment, rack installation if proper control settings. Often, an uals. Major emphasis is placed
applicable, power requirements instrument "malfunction" is the re- on troubleshooting, repair, align-
and power connection. The infor- sult of improper control settings ment, calibration, and performance
- T
mation on power connection is or cable connections. Here again,
6-32. R O U B L E S H O O T I N G
T PROCEDURE
very important for equipment de- careful reading of the operating
signed to operate from different instructions can save valuable 5-33. The following paragraphs. steps, and charts
a d in locating problems. Use this section to isolate
line voltages. Typically, the cor- time. troubleto an assemb1y:then go to that assembly sohe-
matic aad operation in Section Vm to ioeate the de-
rect fuse must be installed and a fective wmwwnts. T e Flow Diagram and Block
h
Diagram should be referred to during the followng
line selector switch must be prop- d~sousslon; these m a y k folded out from Sectronvm.
erly set. A moment of reading THE THEORY SECTION The maintenance section contains
can save time and prevent prob- adjustment and troubleshooting
lems caused by improper power procedures.
This section describes the internal
connections. functions of the equipment. In- provides information to isolate
In some manuals, remote program- cluded are block diagram theory trouble to a particular PC board or
ming is included in the installa- and circuit theory. Also covered functional area and then to trou-
tion section under the premise are descriptions of components, bleshoot to the stage level or com-
that this information will be such as transistors and integrated ponent level. This is accomplished
needed during installation if the circuits. The theory is primarily in several ways, including charts,
instrument is used in a remotely for service personnel, instructors, diagrams, trees, or with step-by-
controlled configuration. and others who need to know the step procedures. Usually the trou-
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TECHNICAL MANUAL ORGANIZA TlON
Ime is &M
rd to the format of
. Once the best trou- The schematic diagram sections
method is determined,
able format i selected
s may be arranged in assembly num-
ted to best present this ber order or in signal flow se-
on. Some manuals sim- quence. Component locators are
waveforms, voltages, and given to aid in locating parts. Fre-
ata next to the schematics quently, waveforms, troubleshoot- not now apply exactly as listed.
or overall block diagram. ing methods, signal levels, and
voltages are given to aid in isola- If the instrument serial p
The in-cabinet performance check ting trouble to the stage or com- greater than that in the manu
allows incoming inspection per- ponent level. design changes were made a
sonnel to verify proper performance. the manual was printed and a M
ual Change Sheet that lists the dif-
ferences should be included with
THE PARTS LIST the manual. To obtain missing
Sheets, contact your local
.
If the instrument serial
NETWORK ANALYZER
SChem8tiC wsth waveform &id test
points identified. 8410A
SERIALS PREFIXED 861-
designations. Included are HP part
numbers, descriptions, federal stock
codes of typical manufacturer, and
CHANGE SHEETS
To improve reliability or perform-
-
For Instrument. with Prefixes higher than
955. see Msnuzl Changes sheet Included
Wlth this m l t u d . For preflxeli below 095
bsekdatlnp In W n d l x 1. Thu m w z l
daes not apply to prefixes below 801
It is important to verify that the correct
the manufacturers' part numbers. ance, design changes may be made manual is being used.
Although the part values are given that require a change in parts or
on the schematics, the tolerances layout. This necessitates manual prefix is lower than that of the
and ratings are listed on the parts change sheets to update the manu- manual, the manual was printed
list descriptions. Parts not located al to reflect the latest instrument after the instrument was built and
on PC boards or assemblies are configuration. the manual must be altered to
in a listing entitled "chas- The way to tell if a particular man- make it agree with the instrument.
rts"or "miscellaneous parts." ual is applicable to your instrument This information is included in the
instruments with ~ o m p l e x is to compare the serial prefix on "Backdating" or "Manual Changes"
anical assemblies, an ex- the instrument to the serial prefix section of the manual. The Manual
view with MP (mechanical listed on the title page of the man- Change Sheet also includes "er-
parts) numbers is usually given. ual. The serial prefix is the four rata," errors or information that
applies to ALL serial prefixes.
Errata means, in effect, "the man-
ual should have read ...".
Typographical errors and improve-
ments or changes in the manual
that apply to all serial prefixes are
SERIAL examples of errata.
NUMBER PREFIX SERIAL NUMBER
Serial prefix identification. Manuals and Change Sheets are
powerful tools that can be used to
digit and one letter portion of the advantage by the experlenced
Typical exploded view. serial number. For example, in the technician. A little time invested
The "quantity" listing gives the serial number 1234A56789, 1234A in learning the organization and
total quantity of a particular part is the serial prefix and this is used using the table of contents pays
in the instrument. Options to denote design changes. big dividends. We hope you agree.
ually listed in a separate title When design changes are made, Rod Dinkins is currently a writing
quantities may be the serial prefix is incremented; supervisor at the Santa Clara Divi-
quantities in the thus all instruments with identical sion of HP. His most recent proj-
rument table. This configurations will have the same ect was the manual for the 5340A
is usually needed serial prefix. The serial number microwave frequency counter. In
mending a selection of (56789 in our example) is unique to addition to being an avid photog-
reventive mainte- a specific instrument and is the raphy buff, Rod also enjoys build-
means of ident ng the product. ing model cars and airplanes.
WWW.HPARCHIVE.COM
.I
.- d f 3 AND dBm WITHOUT LOGS
dB AND dBm WITHOUT A gain and a loss can be combined For example, 8 dB cannot be
easily also. For example, 7 dB is reached directly with combinations
LOGS the sum of +10 dB and - 3 dB. This of 3 dB and 10 dB. But we know
by Dick Gasperini corresponds to a power ratio of 10 7 dB is a power ratio of 5 and 9 dB
The last issue contained a discus- x 1/2 = 5, since the power ratio of is a power ratio of 8. Therefore,
sion of dB and dBm that showed - 3 dB is 1/2. We can also deter- 9 dB must be a power ratio be-
helpful manipulations, but this mine 4 dB, which is the sum of tween 5 and 8.
procedure required the use of +10 dB - 3 dB and - 3 dB. The
logarithms. A great number of equivalent power ratio is 10 x 1/2 x
situations can be handled without 1/2 = 2.5.
logs by using a simple technique What power ratio is represented by
that requires remembering two key 43 dB? This can be expressed as
numbers. +
10 dB + 10 dB 10 dB + 10 dB +
For 3 dB the key number is 2. 3 dB. The equivalent power ratio
is: This technique can be reversed to
For 10 dB the key number is 10.
10 x 10 x 10 x 10 x 2 = 20,000 convert a power ratio to dB as long
A 3 dB change means a power as the power ratio can be broken
change of 2 to 1. A 3 dB increase How about 44 dB? This can be ex- down into a product of 10 and 2.
corresponds to 2 times the original pressed as 10 dB +10 dB +10 d B + For example, a power ratio of 25
power; a 3 dB decrease means 1/2 10 dB +10 dB - 3 dB - 3 dB. This is can be broken down to 10 x 10 x
the original power. a power ratio of: 1/2 x 1/2. This product corre-
A 10 dB change corresponds to a l o x 10 x l o x l o x l o x 1/2x 1/2 = sponds to a sum of 10 dB +10 dB -
power change of 10 to 1. A 10 dB 25,000 3 dB - 3 dB = 14 dB.
increase means 10 times the origin- Thus excellent range and resolu- Voltage ratios can also be expressed
al power; a 10 dB decrease cor- tion can be obtained with this with this method, but it is neces-
responds to 1/10 times the refer- method without calculating loga- sary to double the dB figure for the
ence power. rithms. If the exact dB number two key numbers. That is, 6 dB is
It is helpful to recall that additions cannot be reached, we can at least a voltage ratio of 2 to 1 and 20 dB
in logs is equivalent to multiplying get an approximate power ratio. is a voltage ratio of 10 to 1.
the power ratios. That is, a 6 dB
gain corresponds to a power ratio
of 4 to 1, since 6 dB can be broken
down into two 3 dB gains, each
with a power ratio of 2. Multiply-
ing 2 times 2 yields 4. A 20 dB loss Here is a short quiz to prove how easy this method is:
is a power ratio of 1/10 times 1/10
= 1/100 since 20 dB is the equiva- 1. Determine the power ratio corresponding to the following dB:
lent of two individual 10 dB steps. 4 dB = - power ratio.
A 30 dB gain corresponds to a 9 dB = - power ratio.
power ratio of 10 x 10 x 10 = 1000. -
31 dB = power ratio.
2. Determine the dB equivalent of the following power ratios:
20 to 1 power ratio = - -
am.
5 to 1 power ratio = - dB.
1/4 to 1 power ratio = - dB.
This method makes logs easy to
calculate. 3. What voltage ratio corresponds to the following dB?
4 dB = -
-
The 3 dB and 10 dB key numbers voltage ratio.
can be combined to provide addi- 12 dB = - voltage ratio.
tional capability. For example, 28 dB = -
- voltage ratio.
13 dB is the sum of 3 dB and 10 dB
and can be expressed as a power
ratio by multiplying the individual 4. Calculate the dB corresponding to these voltage ratios:
power ratios. This is 2 x 10, or 20. .5 to 1 voltage ratio = - dB.
To calculate 16 dB (the sum of 3 dB 5 to 1 voltage ratio = -
-
+ 3 dB + 10 dB), multiply the in- dB.
dividual power ratios of 2 x 2 x 10
to obtain 40. 5. How many watts are equivalent to a signal level of +30 dBm? .
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LOGARITHMS WITH HP80
For example, what voltage ratio 10 x 1/2) multiplied by 1 mw, for The equivalent is + 3 dB - 10 dB -
corresponds to a gain of 52 dB? an absolute power level of 5 mw. 10 dB - 10 dB = - 27 dB. This is
This can be expressed as 20 d B + The number of dBm can be deter- actually - 27 dBm since the initial
20 dB + 6 dB + 6 dB, which corre- mined by reversing the procedure. measurement was in absolute
sponds to a voltage ratio of 10 x 10 For example, to determine the dBm power.
x 2 x 2 = 400. equivalent of an absolute power of Using this technique, a very wide
How many dB correspond to a volt- 2 microwatts, first divide by 1 mil- range of dB and dBm can be
age ratio of 8 to l ? This breaks liwatt. This yields a power ratio of covered by remembering only a
down to 2 x 2 x 2, which is 6 d B + 2 x which can also be ex- few key figures.
6dB+6dB=18dB. pressed as 2 x 1/10 x 1/10 x 1/10.
F
I All of the above apply to dB, which
n
is a relative measurement. This
technique also works for measure-
ments stated in dBm, which is an
absolute power level, by remem-
bering that the reference for dBm
is 1 mw. Multiply the power ratio
by 1 mw to obtain the absolute
power level. For example, +7 dBm
is a power ratio of 5 (obtained by
log and In with HP80 Here's the procedure: When a value for FV is entered and
mmmmm1 the equation is solved for n, we
obtain the loglo of FV since an
1-1 Enter the number
The loglo now appears on the dis-
equation of this form is the defini-
tion of loglo.
play. The y register contains the The HP80 uses natural logs (In) to
An easy natural logarithm (the log to the determine the value of n, however.
procedure base e usually denoted by In). Push
or to view this number. In FV = n In 10
to obtain
logarithms For the mathematically minded, n = -In FV
with the here's the reason this procedure
HP 80 mini- In 10
works.
calculator.
The HP80 performs interest and The value for n appears on the dis-
bond calculations using this play, but the value for In FV re-
equation: mains in the y register after the
division. Thus the loglo and In
F V = PV (1 +-) i n of FV are both available.
100
HP 80 procedures have been devel-
In the last issue we had a proce- Where FV = future value (in $) oped to obtain other common num-
dure for obtaining logarithms with PV = present value (in $) bers, such as 7~ and e. Space limi-
the HP80 minicalculator. A simp- i = interest rate (in O/O) tations prevent publishing them
ler procedure exists that produces n = number of payment here, but we would be happy to
the natural log in addition to the periods send you a copy. Please send your
log to the base 10 (usually writ- Substituting 900 for i and 1 for PV, request to Bench Briefs Editor at
ten loglo). the formula reduces to FV = 10n. the address on the last page.
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HP FIELD OFFICES
~
"..call your local HP Although many HP manuals and
off ice ..." other publications contain a com-
plete list of HP offices, the list
may not be completely current
since it is revised only when the
That's a phrase frequently seen in publication is reprinted.
HP publications. It appears with
shipping instructions, parts order- To make sure that you can easily
ing information and service litera- locate your local HP office to ob-
ture. That phrase reminds you to tain the service you have come to
call your local HP office if you need expect of Hewlett-Packard, here's
help. But to do that you must an up-to-date listing of field offices
know where to find your local HP for all areas of the world.
office. As HP continues to grow, An arrowhead ( b ) by the office
many offices find themselves out- serving your area indicates that
growing their facilities and moving there has been a change in address
to larger quarters. Occasionally an or telephone number, etc. during
additional office is added to serve the past year. It may be helpful
an area. These changes may mean to note the new information and to
that an HP office is now more con- pass it along to others in your facil-
veniently located for you. ity also.
UNITED STATES
CONNECTICUT WlllLANO NORTH CAROLINA TEXAS
12 Lunar Orlw 6707 Whitestone Road P.O. Box 5188 P O BOX nm
1181 Hann 06525 UIIImWu 21207 1923 North b i n Street 101 E. M p l b o 1.
l e t 1203) Moa551 Td: (3011 944.5400 n i b mlnt m 2
e l i e h a d m 75080
TWX 7 1 0 4 M 2 M 9 TWXi 710.862-9157 Tel: (9191 885.8101 1 . (2141 231-6101
.
1
TWX: 510S1.1616 TWX. 91017.4723
'
P.O. Box l a 8
. uluonr
2336 E Ultnolla 51.
PuMlDA
PO b X 24210 2 Cholrt Cbrry Rold
156 W R t t Drive
OHIO
P 0. Box 27409
6uLD -r(l Drlw
2806 W OtWand Parh Blvd Rrlr(lle 20350 25575 Wnter R i d e Road SUI9 1W
u cmn 84001
s
2 S10-951-1330l
S l
TWX.
EM FI. Imtwdah 33307
Tal (305)731.1020
Tel: 13011948.6370
Nyx. 71042C-9684 Tal: (506) SZ6.2465
TWX: 910983.M50
CIMIHINII 44145
T d @16)0503oO
n u s t e n 77027
101: (713) 78lbwo
TWX 5109554W9 TWX 810 427 9129 TWX 910881.2645
UASSACHUSEllS
5737 East Broadway PO 801 13910 32 Hartwell Aw. NEW VORX 3460 South Dlxle Drive 231 Billy MlIChrll Road
nuson 85711 6177 Lake Ellenor Or b K i l ( t O M 02173 6 RutomaUon Lane O l m a 4s439 SUI Anrn1.78228
T i l (6021 298.2313 Orlznd., 32809 Tel: I6171 861.8960 Computer Parh le1 (5131 29&0351 TCI: (512) 434-4171
Twx 910952.1162 Tel (3051 859 2900 TWX: 710326.6904 AILMY 12205 TWX 810 4591925 TWX: vio-87i.iim
CALIFORNIA TWX 8108500113 le1 (5181 458.1650
UTAH
MlCHlolsl TWX: 7104416270 1120 Morse Road
1 En1 Orannglhorpe Ave
W
QEORBlA 23855 Research Orlw Columbus 43229 m South Mtln Street
fuuertM 92631
Tal (7141870.1W P.0 b a 28234 b fmtlnu 48024
Tal: (313) 4 7 W E.(lMtl l37W
Road
1219 C ~ m l l l e TeI (6141 Fi46-1300 Wt WU Clty W 1 5
101: (801) 4874716
TWL 9105924286 4% Interstate North
AUmU 30328 TWX: 810242.2900 Tal: 1607) 7 5 C W M OKumWu NIX. Slb925SM1
3SSS LlnLsrrhlm BoulwIrd nl I4041 u 6 6 1 8 1 TWX: 510-252.0890 P 0 BOX noos VlRolNlA
Nmlll WWWd 91W4
T i l . (213) 877-1282
m 1107~.4m
x MINNESOTA
2459 Unlwrslty R~emus b NNrVOrkCIty
Manhattan. Bronx
O k l a b m C m 73132
Tel (4061 7214200
P.O. Bm 9514
2111 spnmr Road
St PIul55114 TWX 91065068662 R I c ) c n u sa
u0
'z
TWX 910 4992170 HAWAII C o n l r t Paramus. NJ Mflec
2875 So Klnt Street Tal (612) ~ 5 . 9 1 ~ 1 TeI (703) 2853431
6305 Arizona PIaca Twx SIbScJ-3734 1st: (2011 2 s 6.W OREWN
LneluIu ma14 Broohlyn, Pwens. Rlchmond 178% Sw b o n e s Ferry Road
NIX: 710.S55-0157
Tel (808) m 4455
x:4%?l
TWX 910328.6148
MISSOURI
11131 Cotera& Aw
Contact Woodbury. NV M i k e
Til: (516) 921.0300
b Rlhnn97062
TeI: (5031 6203350
WASHlNB1ON
Belbflald M i k e PX
ILLINOIS
5500 Howard Street Kuius C e 6 4 1 3 7 82 WIshlnclon Stnet TWX: 910167-8714 -
1203 114th S
1101 Enbarcadero Road TeI 1816) 7 6 1 W o na.lklY. 98ow
t a l i Alle 94303
W e Bw76
Tal I3121 677.0400 TWX 910-771-2OS7
Psumwprle 12601
Trl: (914) 454.7330 F+ENNSVLVANIA b TeI (206) 454.3971
TWX 910443.2303
Tel: (4151 327-6500 TWX 9102233613 NIX: 510-248-Wl2 2500 MOSSSlde Boulevard
TWX: 910373-1280 MOMmarflla 15146 *WEST VlRPlNIA
2220 Walt Aye INDIANA 39 sachaw Drlw Tal: (4121 271.0724 chulesten
3839 Meadows Orlve ROehester 14623 TWX. 710-797-3650 RI: (3041 7684232
SacrInnnU 95825 Tel: I7161 473.9500
lei: (916) 402-1463 1 n d 1 a n ~ U46205
i
TeI, 13171 548.4891 TWX: 510-253.5981 1021 8th Awnue WISCONSIN
TWX 910.M7.2092 `NEVADA 9431 W Belolt Road
.
9606 Aere Orlve
PO Box 23333
Twx. 810.341-3263
LOUISIANA
P 0 BOX 856
:: %;382-5777
5858 East Molloy Road
SYrlrUW 13211
Tel: (3151 454-2486
King of Rustle lndustrlal Parh
Kina of PrussU 19406
Tel: (215) 2 6 7 M O
suite 117
Mltwrukn 53227
le1 (4141 541.0550
Sm D H B 92123 NEW JERSEY TWX: 710-541Q48t NIX: 510.6602670
3239 Willlams Boulevard W 120 Century Road
. FOR us. U W NOT
I
TWX. 910435-2000
COLo(uD0
b ::yz%5524
6201
P I R M I 07852
Ttl: I2011 265-5000
1 Cmsswnys Park Wad
WSodbUn 11797
RHODE ISLAND
871 Watermm Avo.
~nt rr~*uknce02914
LISTED:
Contact the regional offlee M N -
....
TWX 810 955 TWX: 710~990~4941 Tal: 15161 9 2 1 4 3 w
7965 East Prentlee Tal: (4011 434.5535 est you: Atlanla. oaorI11..
TWX: 510221.2168
i w h w aoiio 1060 N. Kings Hilhsay WX. 710.361-7573
..
North Hol~uwood.Catliornia
Panmus. New Jersey. Skole.
Tel: 1303) 771.3455 C h r n M i l l W034
TWX 910935.0705 TeI: I6091 6674wo TENNESSEE Illlnols. Tblr COmPlate ad.
TWX: 710492.4941 Mempbls dmsses are llrtsd abw.
let: (901) 274-7472 `Qnlce Only
CANADA
ALBERTA BRITISH COLUMBIA MANITOBA NOVA SCOTIA owmm QUEBEC
Hewlett.Pachard ICanadaI Ltd. Hewlett-Pachard (Canada) Lld Hewlett Paehard rclntddl Ltd
'
Hewlett.PaCkard (Canada) Ltd Hewlett.Pachard (Canada) Lid HewlettPackard ( C a d . ) Ltd.
11748 Kingsway Rye. 4608 Canada Way 513 Century St 2745 Dutch Vlllsfe Rd 1785 Woodward Or. 275 Hymu5 Boulevard
imonton
Tel: I4031 4525670 b North B u m b y 2
Trl: (6041 433.8213
WlnnIwI
T i l 12041 786 7581
suite 210 Ottawa 3
Tel. (61312558180. 255-6530
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