HP 436A Service manual

Errata
Title & Document Type: 436A Power Meter Operating and Sevice Manual
Manual Part Number: 00436-90053
Revision Date: 1988-03-01
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For example, model number HP8648A is now model number Agilent 8648A.
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•
OPERATING
AND
SERVICE
MANUAL
HP
PartNo.00436-90053
Edition1 E0489
HP
Binder
Part No.9282-1078
HP436A
POWER
METER
(;.!jl
~<J~t>~
?s~~~~
...
fT[ll;
<P
o -
~--~·
..
' "
' \ I I I
I I
~·'"
•
..
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.
._.,
-~
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F//O'I
HEWLETT
~~PACKARD

CERTIFICATION
Hewlett-Packard
Company
certifies
that
this
product
met
its
published
specifications
at
the
time
of
shipment
from
the
factory. Hewlett-Packard further certifies
that
its
calibration
measurements
are traceable to
the
United
States
National
Bureau
of
Standards, to
the
extent
allowed
by
the
Bureau's calibration facility,
and
to
the
calibration facilities
of
other International
Standards
Organization members.
WARRANTY
This
Hewlett-Packard
instrument
product is
warranted
against
defects
in
material
and
workmanship
fora period
of
one
year
from
date
of
shipment.
During
the
warranty
period, Hewlett-Packard
Company
will,
at
its
option,
either
repair
or
replace
products
which prove to be defective.
For
warranty
service
or
repair,
this
product
must
be
returned
to a service
facility
designated
by
HP.
Buyer
shall
prepay
shipping
charges
to
HP
and
HP
shall
pay
shipping
charges
to
return
the
product to Buyer. However,
Buyer
shall
pay
all
ship-
ping charges,.duties,
and
taxes
for products
returned
to
HP
from
another
country.
HP
warrants
that
its
software
and
firmware
designated
by
HP
for use
with
an
instrument
will execute
its
programming
instructions
when
properly
installed
on
that
instrument.
HP
does
not
warrant
that
the
operation
of
the
instrument,
or
software,
or
firmware will be
uninterrupted
or
error free.
LIMITATION OF WARRANTY
The
foregoing
warranty
shall
not
apply
to defects
resulting
from
improper
or
inade-
quate
maintenance
by
Buyer, Buyer-supplied software
or
interfacing,
unauthorized
modification or misuse,
operation
outside
of
the
environmental
specifications for
the
product,
or
improper
site
preparation
or
maintenance.
NO
OTHER
WARRANTY
IS
EXPRESSED OR IMPLIED.
HP
SPECIFICALLY
DISCLAIMS
THE
IMPLIED
WARRANTIES OF MERCHANTABILITY AND
FITNESS
FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE
REMEDIES PROVIDED
HEREIN
ARE BUYER'S SOLE AND EXCLUSIVE
REMEDIES.
HP
SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPE-
CIAL, INCIDENTAL, OR
CONSEQUENTIAL
DAMAGES, WHETHER BASED
ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product
maintenance
agreements
and
other
customer
assistance
agreements
are
available for Hewlett-Packard products.
For
any
assistance,
contact
your nearest Hewlett·
Packard Sales
and
Service Office.
Addresses are provided
at
the
back
of
this manual.
•
••

•
•
.----------OPERATING
AND SERVICE
MANUAL--------....,
HP
436A
POWER
METER
[Including
Options
003,
004
and
022)
SERIAL NUMBERS
This
manual
applies directly to
instruments
with serial numbers prefixed 2410A
and
2410U.
With
changes
described
in
Section VII,
this
manual
also applies to
instruments
with serial
numbers prefixed:
1447A,
1448A, 1451A, 1501A, 1503A, 1504A,
1505A, 1538A, 1550A, 1606A, 1611A, 1629A,
1713A, 1725A, 1746A, 1803A, 1908A, 1911A,
1917A, 1918A, 1930A, 2008A, 2016A, 2101A,
2236A, 2330A, 2347A
and
2347U.
Foradditional
important
informationaboutserial
numbers, see INSTRUMENTS COVERED
BY
MANUAL
in
Section
I.
F/jO'I
HEWLETT
~~PACKARD
©Copyright
HEWLETT-PACKARD COMPANY 1975, 1977, 1980, 1984, 1988
1501
PAGE MILL ROAD, PALO ALTO, CALIFORNIA, U.S.A.
MANUAL PART NO. 00436-90053
Edition 1 E0489
HP
Binder Part No. 9282-1078
Microfiche Part No. 00436-90054

HP 436A
Herstellerbescheinigung
Hiermit wird bescheinigt,
dass
dieses
Gerat/Sys-
tem
in
Ubereinstimmung
mit
den Bestimmungen
von Postver!ugung 1046/84 funkenstort ist.
Der Deutschen Bundespost wurde das Inverkehr-
bringen dieses
Gerates/Systems
angezeigt
und
die
Berechtigung zur Uberpriifung der Serie
auf
Ein-
haltung
der Bestimmungen eingeraumt.
Zusatzinformation
fiir
Mess-
und
Testgerate:
Werden Mess-
und
Testgerate
mit
ungeschirmten
Kabeln
und/oder
in
offenen Messaufbauten ver-
wendet, so
ist
vom Betreiber sicherzustellen,
dass
die
Funk-Entstorbestimmungen
unter Betriebs-
bedingungen
an
seiner Grundstiicksgrenze ein-
gehalten werden.
Manufacturer's Declaration
This
is
to certify
that
this
product meets
the
radio
frequency interference requirements of Directive
FTZ 1046/1984. The
German
Bundespost
has
been
notified
that
this
equipment
was
put
into
circula-
tion
and
has
been
granted
the
right to check
the
product
type
for compliance with these require-
ments.
Note:
If
test
and
measurement
equipment
is
oper-
ated
with unshielded cables
and/or
used for meas-
urements
on
openset-ups,
the
user
must
ensure
that
under
these
operating conditions,
the
radio fre-
quency interference limits
are
met
at
the
border
of
his
premises.
•
•
•

Model436A Contents
•
CONTENTS
Section Page
I GENERAL INFORMATION
...............
1-1
1-1.
Introduction
................................
1-1
1-6.
Specifications
...............................
1-1
1-8.
Instruments
Covered by Manual
.............
1-1
1-14.
Description
.................................
1-1
1-18.
Options
.....................................
1-3
1-19.
Input-Output Options
....................
1-3
1-22.
Remote Control Options
...................
1-3
1-25.
Accessories Supplied
........................
1-4
1-27.
EquipmentRequired
but
notSupplied
........
1-4
1-29.
EquipmentAvailable
........................
1-4
1-33.
Recommended Test Equipment
..............
1-4
1-35.
Safety Considerations
.......................
1-4
II
INSTALLATION
...........................
2-1
2-1.
Introduction
................................
2-1
2-3.
Initial Inspection
...........................
2-1
2-5.
Preparation for Use
.........................
2-1
A
2-6.
Power Requirements
......................
2-1
~
2-8.
Line Voltage
and
Fuse
Selection
...........
2-1
2-10.
Power Cable
..............................
2-2
2-12.
Address Selection
...........................
2-2
2-13.
Circuit Options
.....
,
.....................
2-2
•
...
2-15.
Interconnections
..........................
2-2
2-18.
Mating Connectors
........................
2-3
2-21.
Operating Environment
...................
2-3
~·
2-23.
Bench Operation
..........................
2-3
2-25.
Rack Mounting
.........
:
.................
2-3
2-28
..
Storage
and
Shipment
.......................
2-3
2-29.
Environment
.............................
2-3
2-31.
Packaging
................................
2-3
III
OPERATION
...............................
3-1
3-1.
Introduction
................................
3-1
3-4.
Panel
Features
..............................
3-1
3-6.
Operator's Maintenance
.....................
3-1
3-8.
Operator's Checks
....
·
.......................
3-1
3-10.
Local Operating Instructions
................
3-1
3-12.
Hewlett-Packard InterfaceBus Remote
3-14.
3-18.
3-21.
3-32.
3-40.
3-42.
3-44.
3-46.
3-48.
Operation
.................................
3-14
Co~patibility
............................
3-14
Data
Messages
...........................
3-14
Receiving
Data
Messages
................
3-14
Sending
Data
Messages from
the
Power
Meter
...................................
3-18
Receiving
the
Trigger Message
...........
3-23
Receiving
the
Clear Message
.............
3-23
Receiving
the
Remote Message
...........
3-23
Receiving
the
Local Message
.............
3-23
Receiving
the
Local Lockout
and
ClearLockout SetLocal Messages
.......
3-23
3-50.
Receiving
the
Pass
Control Message
......
3-23
Section
Page
3-52.
Sending
the
Required Service Message
....
3-23
3-54. Sending
the
Status
Byte Message
.........
3-23
3-56. Sending
the
Status
Bit Message
..........
3-23
3-58.
Receiving
the
Abort Message
.............
3-23
3-60.
Test
of
HP-IB Operation
..................
3-23
3-62.
Power Measurement Accuracy
..............
3-23
3-64.
Sources of
Error
and
Measurement
Uncertainty
..............................
3-30
3-70.
Corrections for
Error
.....................
3-30
3-
75.
CalculatingTotal Uncertainty
............
3-30
IV
PERFORMANCE TESTS
..................
.4-1
4-1.
Introduction
................................
4-1
4-3.
Equipment Required
........................
4-1
4-5.
Test Record
.................................
4-1
4-
7.
Performance Tests
..........................
4-1
4-10.
Zero CarryoverTest
.........................
4-2
4-11.
InstrumentAccuracyTest
...................
4-3
4-12.
Calibration Factor Test
.....................
4-6
4-13.
Power Reference Level Test
..................
4-7
V ADJUSTMENTS
...........................
5-1
5-1.
Introduction
................................
5-1
5-4.
Safety Considerations
.......................
5-1
.
5-10.
EquipmentRequired
........................
5-1
5-12.
Factory Selected Components
...............
5-1
5-14.
Adjustment Locations
.......................
5-1
5-16.
DC
Offset Adjustment.
......................
5-3
5-17.
Auto Zero Offset Adjustment
................
5-3
5-18.
Spike BalanceAdjustment
..................
5-4
5-19.
Multivibrator Adjustment
...................
5-6
5-20.
A-D
Converter
and
Linear Meter
Adjustment
................................
5-7
5-21.
Power Reference Oscillator Frequency
Adjustment
...........................
·
.....
5-8
5-22.
Power Reference Oscillator Level
Adjustment
...............................
5-10
5-23.
Power Supply Adjustments
.................
5-13
VI REPLACEABLE PARTS
....................
6-1
6-1.
Introduction
................................
6-1
6-3.
Abbreviations
...............................
6-1
6-5.
Replaceable
Parts
List
......................
6-1
6-7.
Ordering Information
.......................
6-1
6-10.
Parts
Provisioning
..........................
6-1
6-12.
Direct Mail Order System
...................
6-1
VII MANUAL CHANGES
......................
7-1
7-1.
Introduction
................................
7-1
7-3.
Manual Changes
............................
7-1
7-6.
Manual Change Instructions
................
7-3
iii

Contents Model 436A
CONTENTS (cont'd)
Section Page Section
Page
VIII SERVICE
..................................
8-1
8-1.
Introduction
...............................
8-1
8-3.
Safety Considerations
......................
8-1
8-9.
Recommended Test
Equipment
.............
8-5
8-11.
Service Aids
...............................
8-5
8-16.
Repair
.....................................
8-5
8-17.
Factory Selected Components
.............
8-5
8-19.
Disassembly
and
Reassembly
Procedures
..............................
8-5
8-24.
Basic Circuit Descriptions
..................
8-
7
8-25.
Linear
Integrated Circuits
................
8-
7
8-30.
8-55.
8-59.
8-64.
8-70.
8-71.
8-75.
8-87.
8-114.
8-117.
8-130.
Digital
Integrated
Circuits
and
Symbols
..
8-
7
Troubleshooting
.........................
8-16
Standard
Instrument
Checkout
..........
8-16
HP-IB
Instrument
Checkout
.............
8-69
Block Diagram Circuit Descriptions
.......
8-117
Service Sheet 1
.........................
8-117
Service Sheet 2
.........................
8-118
Service Sheet 3
.........................
8-122
Service Sheet 4
.........................
8-144
Command
Mode Operation
.............
8-144
Data
Mode Operation
..................
8-147
ILLUSTRATIONS
Figure Page Figure
Page
1-1.
HP
Model 436A Power Meter
and
5-6.
Power Reference Oscillator Frequency
Accessories Supplied
.......................
1-0
Adjustment Setup
..........................
5-8
5-7.
Power Reference Oscillator Level
2-1.
Line Voltage
and
Fuse Selection
.............
2-1
2-2.
Power Cable
and
Mains
Plug
Part
Adjustment Setup
.........................
5-10
Numbers
...................................
2-2
6-1.
Cabinet
Parts
..............................
6-19
2-3.
Hewlett-Packard Interace Bus Connection
...
2-5
3-1.
Front
and
Rear
Panel
Controls,
Connectors
and
Indicators
.................
3-2
3-2.
Operator's Checks
...........................
3-6
3-3.
Operating Instructions
.....................
3-11
3-4.
Power Meter Response Curve (Settling
Time for Analog Circuits)
.................
3-20
3-5.
Measurement Timing Flow
Chart
(Settling
Time for Digital Circuitry)
.................
3-21
3-6.
Operating Program Simplified
Flow
Chart
...............................
3-22
3-7.
Test ofHP-IB Operation Flowchart
.........
3-24
3-8.
436A Quick Programming Guide
............
3-25
3-9.
Calculating Measurement Uncertainties
....
3-32
3-10.
TheEffect ofPower Sensor
Mismatch
on Measurement Accuracy
................
3-34
3-11.
Calculating Measurement
Uncertainty
(Uncertainty
in
dB Known)
................
3-35
8-1.
Schematic
Diagram
Notes
...................
8-2
,.
8-2.
Front
Panel
Removal.
.......................
8-6
8-3.
Operational Amplifier
Functional
Circuits
...
8-8
8-4.
Dual D-Type Flip-Flop
.......................
8-9
8-5.
Four-Bit Bistable
Latch
.....................
8-9
8-6.
Dual J-K
Master/Slave
Flip-Flop
and
Gate
PulseTiming
.............................
8-10
8-7.
Dual J-KEdge-Triggered Flip-Flop
..........
8-10
8-8.
Programmable Counters
...................
8-11
8-9.
3-Line to 8-Line Decoder
....................
8-12
8-10.
8-lnput
Data
Selector (Multiplexer)
.........
8-13
8-11.
LED Display Driver
........................
8-14
8-12.
Numeric Display
.....................
,
.....
8-15
8-13.
MOS
and
TI'L
ROMs
......................
8-15
8-14.
Power Meter Operating Cycle
...............
8-17
8-15.
Operating
Program
Flow
Chart
............
8-25
8-16.
HP-IB Verification
Program
(HP 9830A Calculator)
....................
8-70
4-1.
Zero Carryover Test Setup
...................
4-2
4-2.
Instrument
Accuracy Test Setup
.............
4-4
4-3.
Calibration Factor
Test
Setup
...............
4-6
4-4.
Power Reference Level Test Setup
............
4-8
8-17.
HP-IB Verification
Program
(HP 9820A Calculator)
....................
8-95
8-18.
Analog-to-Digital Converter Simplified
Diagram
and
Waveforms
.................
8-120
8-19.
HP-IB Listen
Handshake
Timing
..........
8-145
5-1.
DC
Offset Adjustment Setup
.................
5-3
8-20.
Data
Valid
Status
Generator
Timing
......
8-154
5-2.
Auto Zero Offset Adjustment Setup
..........
5-4
8-21.
Overall Block
Diagram
....................
8-159
5-3.
Spike Balance Adjustment Setup
............
5-5
5-4.
Multivibrator Adjustment Setup
.............
5-6
5-5.
A-D
Converter
and
Linear
Meter
8-22.
AC
Gain,
A-D
Converter
and
Display
Circuits Block
Diagram
..................
8-161
ri.
8-23.
Controller
and
Counters Block
Diagram
...
8-163
Adjustment Setup
..........................
5-7
8-24.
HP-IB (Opt.
022)
Circuit Block
Diagram
...
8-165
lV

.-
•
Model 436A Contents
ILLUSTRATIONS {cont'd)
Figure
Page
8-26
AlAl
Display Assembly Component
Locations
...............................
8-169
8-27.
A1A2
Pushbutton
Assembly Component
Locations
...............................
8-169
8-28.
Front
Panel
Assembly Schematic
Diagram
................................
8-169
8-29.
A2
AC Gain Assembly Component, Test
Point,
and
Adjustment Locations
........
8-171
8-30.
AC Gain Assembly Schematic Diagram
...
8-171
8-31.
A1A3
CALF
ACTOR% Switch
Assembly Component Locations
........
8-173
8-32.
A3
A-D
ConverterAssembly
Components, Test Point,
and
Adjustment Locations
...................
8-173
8-33.
A-D
Converter Assembly Schematic
Diagram
................................
8-173
8-34.
A4
Counter Relative Assembly
Component
and
Test
Point
Locations
....
8-175
8-35.
Counter Relative Assembly Schematic
Diagram
................................
8-175
8-36.
A5
Controller Assembly Component
and
Test
Point
Locations
................
8-177
8-37.
Controller Assembly Schematic
Diagram
~
...............................
8-177
Figure
Page
8-38.
A6
HP-IB (Option
022)
Control Assembly
Component
and
Test
Point
Locations
....
8-178
8-39.
HP-IB (Option 022) Control Assembly
Schematic
Diagram
.....................
8-179
8-40.
A7
HP-IB (Option
022)
Input/Output
Assembly Component
and
Test
Point
Locations
....................
8-181
8-41.
HP-IB (Option 022)
Input/Output
Assembly Schematic
Diagram
...........
8-181
8-44.
AB
Power Reference Oscillator Assembly
Component,
Test
Point,
and
Adjustment Locations
...................
8-187
8-45.
Power Reference Oscillator Assembly
Schematic
Diagram
.....................
8-187
8-46. A9 Power Supply Rectifier
and
Regulator
Assembly Component
and
Test
Point
Locations
....................
8-189
8-47.
Rear
Panel
Mounted Power Supply
Component Locations
...................
8-189
8-48.
Power Supply Rectifier
and
Regulator
Assembly Schematic
Diagram
...........
8-189
8-49.
Rear View
of
Front
Panel
(Removed)
.......
8-191
8-50.
Top
Internal
View
Standard
Instrument
...
8-191
8-51.
Top
Internal
View HP-IB
..................
8-191
TABLES
Table
Page
Table
Page
1-1.
Specifications
...............................
1-2
4-5.
Performance
Test
Record
...................
4-10
1-2.
Recommended
Test
Equipment
..............
1-5
5-1.
Factory Selected Components
...............
5-2
2-1.
Line Fuse
Ratings
and
Part
Numbers
........
2-2
2-2.
Circuit Options
.............................
2-4
6-1.
Reference Designators
and
Abbreviations
....
6-2
2-3.
USA
Standard
Code for Information
6-2.
Replaceable
Parts
...........................
6-4
Interchange
(ASCII)
......................
2-4
6-3.
Code List
of
Manufacturers
.................
6-21
3-1.
Message Reference Table
...................
3-15
7-1.
Manual
Changes
by
Serial
Number
..........
7-1
3-2.
Measurement Sequence
.....................
3-16
7-2.
Summary
of
Manual
Changes
by
Page
3-3.
Hewlett-Packard Interface
Bus
Input
Number
..................................
7-2
Program Codes
..........................
3-17
3-4.
Hewlett-Packard Interface
Bus
Output
8-1.
Logic Levels
and
Power Requirements
.......
8-9
Data
String
..............................
3-19
8-2.
Program
Mnemonic Descriptions
...........
8-20
3-5.
Power Meter Remote Access Time to
8-3.
Standard
Instrument
Checkout
.............
8-52
First
Output
Data
Character
.............
3-20
8-4.
HP-IB Circuit Troubleshooting
.............
8-99
8-6.
Operating
Program
Description
...........
8-124
4-1.
Zero Carryover Autorange Digital
8-7.
Up/Down Count Control Logic Steering
...
8-139
Readout Results
...........................
4-3
8-8.
Function Decoder Clock Selection
..........
8-149
4-2.
Instrument
Accuracy Test Results
...........
4-5
8-9.
Programming
Command
Logic Operating
4-3.
Instrument
Accuracy Test Results for
Summary
...............................
8-149
dB [REF] Mode
...........................
4-5
8-10.
Power Meter
Talk
HP-IB
Output
Data
4-4.
Calibration
Factor
Test
Results
..............
4-
7
Format
.................................
8-155
v

Contents Model436A
SERVICE SHEETS
Service Sheet Page
1 Overall Block Diagram ...................... 8-159
2 AC Gain, A-D Converter, and Display
Circuits Block
Diagram (AlAl, A2, A3) ... 8-161
3 Controller and Counters Block Diagram
(A1A2, A4, A5) ........................... 8-163
4 HP-IB (Option 022) Circuit Block Diagram
(A6, A7) .................................. 8-165
6 Front Panel Assembly (AlAl, A1A2) ........ 8-169
7 AC Gain Assembly (A2) ..................... 8-171
vi
Service Sheet Page
8 A-D Converter Assembly (A1A3, A3) ......... 8-173
9 Counter Relative Assembly (A4) ............. 8-175
10 Controller Assembly (A5) ................... 8·177
11 HP-IB (Option 022) Control Assembly (A6) ... 8-179
12 HP-IB (Option 022) Input/Output
Assembly (A7) ........................... 8-181
14 Power Reference Oscillator Assembly (AS) ... 8-187
15 Power Supply Rectifier and Regulator
Assembly (A9,
AlO) ...................... 8-189
•

-
•
•
•
Model 436A Safety Considerations
SAFETY CONSIDERATIONS
GENERAL
This
product
and
related documentation
must
be
reviewedfor familiarization
with
safety
markings
and
instructions before operation.
This
product is a
Safety
Class
I
instrument
(pro-
vided
with
a protective
earth
terminal).
BEFORE APPLYING POWER
Verify
that
the
product is
set
to
match
the
avail-
able line voltage
and
the
correct fuse is installed.
SAFETY EARTH
GROUND
An
uninterruptible safety
earth
ground
must
be
provided from
the
main
power source to
the
pro-
duct
input
wiring terminals, power cord,
or
sup-
plied power cord set.
lwARNINGSI
Any
interruption
of
the
protective (grounding)
conductor (inside or outside
the
instrument) or
disconnecting
the
protective
earth
terminal
will
cause
a potentialshock
hazard
that
could
result
in
personal
injury. (Grounding one conductor
of
a
two conductor outlet is
not
sufficient protection.)
In
addition, verify
that
a common ground exists
between
the
unit
under
test
and
this
instrument
prior
to energizing either unit.
Whenever
it
is likely
that
the
protection
has
been
impaired,the
instrument
must
bemadeinoperative
and
besecured
against
any
unintendedoperation.
If
this
instrument
is to be energized
via
an
auto-
transformer
(for voltage reduction)
make
sure
the
common
terminal
is connected to
neutral
(that
is,
the
grounded side
of
the
mains
supply).
Servicing instructions are for use by service-
trained
personnel only. To avoid dangerous elec-
tric shock,
do
not
perform
any
servicing unless
qualified to
do
so.
Adjustments
described
in
the
manual
are
per-
formed with power supplied to
the
instrument
whileprotectivecovers
are
removed.
Energy
avail-
able
at
many
points may,
if
contacted, result
in
personal injury.
Capacitors
inside
the
instrument
may
still be
charged
even
if
the
instrument
has
been discon-
nected from its source
of
supply.
For
continued protection
against
fire
hazard,
re-
place
the
line fuse(s) only
with
250V fuse(s)
of
the
same
current
rating
and
type(forexample,
normal
blow, timedelay, etc.). Do
not
userepairedfuses or
short
circuited fuseholders.
SAFETY SYMBOLS
&
Instruction
manual
symbol:
the
product
will be
marked
with
this
symbol
when
it
is
necessary for
the
user to refer to
the
in-
struction
manual
(seeTable
of
Contentsfor
page references).
7 Indicates
hazardous
voltages.
~
Indicates
earth
(ground) terminal.
I
The
WARNING
sign
denotes a
.._w_A_R•N•l•N•G_.
hazard.
It
calls
attention
to a
procedure, practice, or
the
like,
which,
if
not
correctlyperformed
or
adhered
to, couldresult
in
per-
sonal
injury.
Do
not
proceed
be-
yonda WARNING
sign
until
the
indicated conditions
are
fully
understood
and
met.
The
CAUTION
sign
denotes a
hazard.
It
calls
attention
to
an
operatingprocedure, practice, or
the
like, which,
if
not
correctly
performed or adhered to, could
result
in
damage
to or destruc-
tion
of
part
or
all
of
the
product.
Do
not
proceed beyond a CAU-
TION
sign
until
the
indicated
conditions
are
fully understood
and
met.
vii

General Information Model 436A
•
POWER METER
TUNING
TOOL
POWER SENSOR
CABLE
POWER
CABLE
•
Figure
1-1.
HP
Model
436A
Power
Meter
and
Accessories
Supplied
1-0

•
Model 436A General Information
SECTION I
GENERAL INFORMATION
1-1. INTRODUCTION
1-2. This manual provides information pertaining
to
the installation, operation, testing, adjustment
and maintenance
of the HP Model 436A Power
Meter.
1-3. Figure 1-1 shows the Power Meter with
accessories supplied.
1-4. Packaged with this manual is an Operating
Information Supplement. This
is simply a copy of
the first three sections of this manual. This
supplement should be
kept with the instrument for
use by the operator. Additional copies of
the
Operating Information Supplement may be
ordered through
your nearest Hewlett-Packard
office. The part numbers are listed
on the title page
of this manual.
1-5. On the title page
of this manual, below the
manual part number, is a "Microfiche" part
number. This number may be used to order
4x6-inch microfilm transparencies
of the manual.
The microfiche package also includes
the latest
Manual Changes supplement
as well as all pertinent
Service Notes.
1-6. SPECIFICATIONS
1-7. Instrument specifications are listed in
Table 1-1. These specifications are
the performance
standards or limits against which
the instrument
may be tested.
1-8. INSTRUMENTS COVERED BY MANUAL
1-9. Power Meter Options 003, 004, and 022 are
documented in this manual. The differences are
noted in the appropriate location such as
OPTIONS in Section I,
the Replaceable Parts List,
and
the schematic diagrams.
1-10. This instrument has a two-part serial
number. The first four digits and the letter
comprise the serial number prefix. The last five
digits form the sequential suffix
that is unique to
each instrument. The contents of this manual
apply directly
to instruments having the same serial
number prefix(es) as listed under SERIAL
NUMBERS
on the title page.
1-11. An instrument manufactured after
the
printing of this manual may have a serial prefix
that is not listed on the title page. This unlisted
serial prefix indicates
that the instrument is
different from those documented in this manual.
The manual for this instrument is supplied with a
yellow Manual Changes supplement that contains
change information
that documents the
differences.
1-12. In addition
to change information, the
supplement may contain information for cor-
recting errors in the manual. To keep this manual
as current and accurate
as possible, Hewlett-
Packard recommends
that you periodically request
the latest Manual Changes supplement. The
supplement for this manual is keyed
to the
manual's
print date and part number, both of
which appear on the title page. Complimentary
copies
of the supplement are available frorri
Hewlett-Packard.
1-13.
For information concerning a serial number
prefix not listed on the title page or in the Manual
Changes supplement,
contact your nearest Hewlett-
Packard office.
1-14. DESCRIPTION
1-15. The Power Meter is a preclSlon digital-
readout instrument capable
of automatic and
manual measurement of RF and Microwave power
levels.
It is designed for interconnection with a
compatible Power Sensor (refer
to Table 1-1,
Specifications)
to form a complete power measure-
ment system. The frequency and power range of
the system are determined by the particular Power
Sensor selected for use. With
the Power Sensors
available, the overall frequency range
of the system
is
100 kHz to 18 GHz, and the overall power range
is
-70 to +35 dBm.
1-16. Significant operating features
of the Power
Meter are as follows:
• Digital Display: The display is a four-digit,
seven-segment LED, plus a sign when in the
dBm
or dB (REL) mode. It also has under- and
1-1

General Information Model 436A
Table
1-1.
Specifications
SPECIFICATIONS
Frequency
Range:
Response
Time:
100kHz
to
26.5
GHz
(depending on power sensor used).
(0
to
99%
of
reading,
five
time constants)
Power
Range:
Range 1 (most sensitive)
<10
seconds.
Range 2
<1
second
(display calibrated
in
watts, dBm, and
dB
relative to
reference power level).
With
8481
A,
8482A,
or
8483A
sensors:
50
dB
with 5
full scale ranges
of-20,
-10,
0, 10, and 20 dBm
(10 µW to 100
mW).
With
8481
B
or
84828
sensors:
HP
8481B
is
44 dB
(1
mW
to
25W)
at
0 to 35°C and
HP
8482B
is
43
dB
(1
mW
to
20W)
at
35°C
to
55°C with 5 ranges
of
10, 20, 30, 40 and 43
or
44 dBm.
With
8481
H
or
8482H
sensors:
45
dB
with 5 ranges
of
0,
10,
20, 30 and 35 dBm (1
mW
to
3W).
With
8484A
sensor:
50
dB
with 5 full scale ranges
of
-60,
-50,
-40,
-30,
and
-20
dBm
(1
nWto
lOµW).
Range
3-5
<100
milliseconds.
(Typical, measured
at
recorder output).
Cal
Factor:
16-position switch normalizes meter reading to ac·
count for calibration factor
or
effective efficiency.
Range
85%
to
1003
in
13
steps.
Cal
Adjustment:
Front panel adjustment provides capability
to
adjust
gain
of
meter
to
match power sensor in use.
Recorder
Output:
Proportional
to
indicated power with 1 volt corre-
sponding
to
full scale and 0.316 volts
to
-5
dB;
Accuracy:
1
kn
output
impedance,
BNC
connector.
1-2
lnstrumentation
1 :
Watt mode: ±0.53.
dBm mode: ±0.02
dB
±0.001 dB/°C.
3
dB
[REL]
mode2: ±0.02
dB
±0.001
dB/°C~
Zero:
Automatic, operated by front panel switch.
Zero
set:
±0.53
of
full scale on most sensitive range.
typical,
±1
count on other ranges.
Zero
carry
over:
±0.23
of
full scale when zeroed
on
the most sensitive range.
Noise
(typical, at constant temperature, peak change
over any one-minute interval): 20
pW
(8484A);
40
nW
(8481A, 8482A, 8483A); 4
µW
(8481H,
8482H).
Drift
(1
hour, typical, at constant temperature after
24-hour warm-up); 20
pW
(8484A); 10
nW
(8481A,
8482A, 8483A); 1.0
µW
(8481H, 8482H).
Power
Reference:
Internal 50
MHz
oscillator with
Type N Female connector on front panel (or
rear
panel, Option 003 only).
Power output:
1.00
mW.
Factory set to ±
0.7%,
traceable to the National
Bureau of Standards.
Accuracy:
±1.2%
worst case
(±0.9%
rss) for one
year (0°C to
55°C).
RF
Blanking
Output:
Open collectorTTL; low conesponds to blanking
when auto-zero mode
is
engaged.
Display:
Digital display with four digits,
203
over-range capa-
bility on all ranges. Also, uncalibrated analog peak·
ing
meter
to
see fast changes.
Power
Consumption:
lOOV
±
103,
48
to 66
Hz
and 360
to
440 Hz.
120V
+53,
-103,
48
to
66
Hz
and 360 to 440
Hz.
220
or
240V
+53,
-103
48
to 66 Hz.
Typically less than 24 watts (<25 watts for Opt.
022),
60V·A
maximum.
Dimensions:
134 mm High (5-1/4 inches).
213 mm Wide (8-3/8 inches).
279 mm Deep (11 inches).
Net
Weight:
4.5
kg
(10 lbs).
1Includes sensor non-linearity. Add
+2,
-4% on top range when using the
8481A, 8482A,
or
8483A
power
sensors.
2Specifications are for within range measurements. For range-to-range accuracy add the range uncertainties.
3Referenced to
25°C.
•
•

•
•
Model 436A
DESCRIPTION (cont'd)
overrange indicators. There
is
a 20 percent
overrange capability in all ranges. Large
10 mm (0.375 inch) digits are easy
to
see even
in a high glare environment.
• Auxiliary Meter: Complements the digital
display
by
showing fast changes in power level.
Ideal for
"peaking"
transmitter
output
or
other variable power devices.
•Choice
of
Display
in
Watts, dBm
or
dB:
Absolute power can be read
out
in watts or
dBm. Relative power measurements are made
possibile with
the
dB [REF] switch. Pressing
this switch zeros
the
display for any applied
input
power and any deviation from this
reference is shown in dB with a resolution
of
±0.01 dB. This capability is particularly useful
in frequency response testing.
• Power Units and Mode Annunciator: The units
annunciator provides error-free display
interpretation by indicating appropriate power
units in
the
watt
mode. The mode annunciator
indicates the
mode
of
operation: dBm, dB
(REL), ZERO
or
REMOTE.
• Completely Autoranging: The Power Meter
automatically switches through its 5 ranges
to
provide completely "hands
off"
operation.
The RANGE HOLD switch locks
the
Power
Meter in one
of
its ranges when autoranging
is
not
desired.
•Automatic
Sensor Recognition: The Power
Meter continually decodes the sensitivity
of
the Power Sensor
to
which
it
is
connected.
This information is
then
used
to
automatically
control
the
digital display decimal
point
location and, when
WA
TT
MODE
operation
is
selected,
to
light
the
appropriate power units
annunciator.
•Auto
Zero: Zeroing the meter
is
accomplished
by merely depressing
the
SENSOR ZERO
switch and waiting until the display shows all
zeros before releasing it. The meter
is
ready
to
make measurements
as
soon as
the
zero light
in the mode annunciator
goes
off.
•
RF
Blanking
Output:
Open collector TTL; low
corresponds
to
blanking when the sensor zero
is
engaged, May be used to remove the
RF
input signal connected
to
the power sensor.
•Calibration
Accuracy: A 1.00
mW,
50
MHz
reference
output
is
available
at
the
front
panel
General Information
for calibrating the Power Meter and the Power
Sensor as a system. Calibration
is
accomp-
lished using
the
CAL ADJ and CAL FACTOR
% controls. The CAL ADJ control compen-
sates for slight differences in sensitivity
associated with a particular
type
of
Power
Sensor and the CAL FACTOR % control
compensates for mismatch losses and effective
efficiency over
the
frequency range
of
the
Power Sensor.
• Recorder
Output:
Provides a linear
output
with respect
to
the
input
power level.
For
each range, a
+l.00
Vdc
output
c;orresponds
to
a full scale
input
power level. Refer
to
Table 1-1, Specifications,
for
the
full-scale
range values associated with the various types
of
Power Sensors available.
1-17. The Hewlett-Packard Interface Bus (HP-IB)
Option 022 allows full remote control operation
of
all
the
power meter functions (CAL FACTOR
can be programmed
to
either 100%
or
the CAL
FACTOR which has been manually set on
the
front
panel). This option may be added
by
the
user
at
a later time as his requirements grow.
1-18. OPTIONS
1-19. Input-Output Options
1-20. Option 003. A rear panel POWER
REF
OUTPUT connector replaces
the
standard front
panel connector.
1-21. Option 004. The 1.5 metre (5 ft.) power sen-
sor cable
is
not
shipped with
the
power meter.
1-22. Remote Control Options
1-23. Option
022
adds remote interface capability
to
the
Power Meter. Option 022 is compatible with
the
Hewlett-Packard Interface Bus
(AHl,
CO,
DC2,
DTl,
L2,
LEO,
PPO,
RL2,
SHl,
SRO,
T3,
TEO).
1-24. Option 022 may be ordered in kit
form
under HP
part
number 00436-60035. The kit
contains a control assembly printed-circuit board,
an
input/output
assembly printed circuit board,
and a
data
cable for interconnection.
1-3

General Information
1-25. ACCESSORIES SUPPLIED
1-26. The accessories supplied with
the
Power
Meter are shown in Figure 1-1.
a. The 1.5 metre (5
ft.)
Power Sensor Cable,
HP
ll
730A, is used
to
couple
the
Power Sensor
to
the
Power Meter. Order
option
004
to
delete
the
standard 1.5 metre cable.
b. The line power cable
may
be supplied in
one
of
four configurations. Refer
to
the
paragraph
entitled Power Cables in Section II.
c. An alignment
tool
for
adjusting
the
CAL
ADJ front panel control (HP
Part
No. 8710-0630).
1-27. EQUIPMENT REQUIRED BUT NOT
SUPPLIED
1-28. To form a complete
RF
power
measurement
system, a Power Sensor such
as
the
HP Mode!
8481A must be connected
to
the
Power Meter via
the
Power Sensor cable.
1-29. EQUIPMENT AVAILABLE
1-30. The
HP
Model
11683A
Range Calibrator
is
recommended for performance testing, adjusting,
and troubleshooting the Power Meter. The Power
Meter's range-to-range accuracy and auto-zero
operation can easily be verified with
the
Calibrator.
It
also has
the
capability
of
supplyir1g a full-scale
test signal for each range.
1-31. Two extender boards (HP Part Numbers
5060-0258, and 5060-0630; 24 and
44
pins
respectively) enable
the
Power Meter
printed
circuit assemblies
to
be accessed for service.
1-4
Model 436A
Rubber
bumpers (HP Part No. 0403-0015) should
be installed
on
the
extender
boards
to
prevent
the
boards from touching.
1-32.
The
following table lists
the
cable accessories
and
their
lengths
that
are available
for
use with
the
Power Meter. Order
option
004
if
the
standard 1.5
metre cable
is
not
desired
with
a cable accessory.
Cable
Accessory
Cable
Length
HP
11730B 3.0 m (10
ft)
HP
11730C 6.1 m (20
ft)
HP
11730D 15.2 m (50
ft)
HP
11730E 30.5 m (100
ft)
HP
11730F 61.0 m (200
ft)
1-33 RECOMMENDED TEST EQUIPMENT
1-34.
The
test
equipment
shown
in
Table 1-2
is
recommended for use during performance testing,
adjustments, and troubleshooting.
To
ensure
optimum
performance
of
the Power Meter, the
specifications
of
a substitute
instrument
must
equal
or
exceed
the
critical specifications shown in
the
table.
1-35 SAFETY CONSIDERATIONS
1-36.
The
Power Meter is a Safety Class I
instrument. This
instrument
has been designed
according
to
international safety standards.
1-37. This operating and service manual contains
information, cautions, and warnings which
must
be
followed
by
the
user
to
ensure safe operation and
to
retain the instrument in safe condition.
•

Model 436A General Information
Table
1-2.
Recommended
Test
Equipment
Instrument
Type
Critical
Specifications
Suggested
Use*
Model
Range Calibrator Chopped
de
output
for each range referenced to 1
mW
range
HP
11683A P,A,T
Digital Voltmeter Function:
DC,
resistance
HP
3456A P,A,T
Range Resistance: 200 ohms
Vdc: 100 mVdc, 1000 mVdc, 10 Vdc, lOOVdc
10Mr2 input impedance
6-digit resolution (±0.05%
of
reading, ±0.02%
of
range)
Power Meter Range: 1
mW
HP
432A
P,A
Transfer Accuracy (input -to-output): 0.2%
Thermistor
SWR:
1.05, 50
MHz
HP
478A-H75**
P,A
Mount Accuracy: ±0.5%
at
50
MHz
or
HP
478A-H76**
Counter Frequency Range: 220 Hz, 50
MHz
HP
5315A A
Sensitivity: 100 m
Vrms
Accuracy: 0.01%
Oscilloscope Bandwidth:
de
to
50
MHz
HP
180C/ T
Vertical Sensitivity: 0.2V/division 1801A/1821A
Horizontal Sensitivity: 1 ms/division
• Logic Analyzer Clock Input: 60 kHz
HP
1600A T
Trigger Word: 8 Bits
Bit Input: TTL
Display Word: 8 Bits
•p
=Performance
Tests; A
=Adjustments;
T =Troubleshooting
**For maximum accuracy
the
478A-H75
should
be calibrated
by
the
National Bureau of
Standards.
The
478A-H76, which includes
HP
Standards
Laboratory calibration,
may
be used with a measurement
system accuracy of
0.58%
instead
of
0.5%.
1-5/1-6

•
•
Model 436A Installation
SECTION II
INSTALLATION
2-1. INTRODUCTION
2-2. This section provides all information neces-
sary
to install the Power Meter. Covered in the
section are initial inspection, power requirements,
line voltage selection, interconnection, circuit
options, mounting, storage,
and repackaging for
shipment.
2-3. INITIAL INSPECTION
2-4. Inspect the shipping container for damage. If
the shipping container or cushioning material is
damaged, it should be kept until the contents of
the shipment have been checked for completeness
and the instrument has been checked mechanically
and electrically. The contents of the shipment
should be
as shown in Figure 1-1. Procedures for
checking electrical performance are given in
Section IV.
If the contents are incomplete, if there
is mechanical damage
or defect, or if the instru-
ment does not pass the electrical performance test,
notify the nearest Hewlett-Packard office. If the
shipping container is.damaged, or the cushioning
material shows signs
of stress, notify the carrier as
well as the Hewlett-Packard office. Keep the
shipping materials for the carrier's inspection.
2-5. PREPARATION FOR USE
2-6. Power Requirements
2-7. The Power Meter requires a power source of
100, 120, 220, or 240 Vac, +5%, -10%, 48 to
440 Hz single phase. Power consumption is approx-
imately
20 watts.
IWARNING I
If this instrument is to be energized via an
autotransformer for voltage reduction,
make
sure the common terminal is connected to the
earthed pole
of the power source.
2-8. Line Voltage and Fuse Selection
BEFORE PLUGGING THIS INSTRUMENT
into the Mains (line) voltage, be sure the cor-
rect voltage and fuse have been selected.
2-9. A rear panel, line power module permits
operation from
100, 120, 220, or 240 Vac. The
number visible in the window (located on the
module) indicates the nominal line voltage to
which the instrument must be connected. Verify
that the line voltage selection card and the fuse
are
matched to the power source. Refer to Figure
2-1, Line Voltage
and Fuse Selection. Table 2-1
lists
the ratings and HP part numbers for the
replaceable fuses.
IWARNING I
For protection against fire hazard, the
line fuse for
220/240Voperation should
only be a 250V slow blow fuse with the
correct current rating.
Operating voltage is shown
in module window.
SELECTION OF OPERATING VOLTAGE
1. Open cover door, pull the FUSE PULL lever and rotate to
left. Remove the fuse.
2. Remove the Line Voltage Selection Card. Position the card
so the line voltage appears at top-left corner. Push the card
firmly into the slot.
3. Rotate the FUSE PU LL lever to its normal position. Insert
a fuse of the correct value in the holder. Close the cover
door.
IWARNING I
To avoid the possibility of hazardous electri-
cal shock,
do not operate this instrument at
line voltagesgreater than 126.5 Vac with line
frequencies greater
than 66 Hz (leakage cur-
rents at these line settings may exceed
3.5 mA).
Figure 2-1. Line Voltage and Fuse Selection
2-1

Installation
Table
2-1.
Line
Fuse
Ratings
and
Part
Numbers
Line
Rating
Part
Number
Voltage
100/120V .75A, 250V 2110-0063
220/240V .375A, 250V, SLO-BLO 2110-0421
2-10.
Power Cable
I
WARNINGS
I
BEFORE SWITCHING ON THIS IN-
STRUMENT, the protective earth termi-
nals
of
this instrument
must
be connected
to the protective conductor
of
the (mains)
power cord. The mains
plug
shall only be
inserted in a socket
outlet
provided with a
protective earth contact. The protective
action
must
not
be negated by the use
of
an
extension cord (power cable)
without
a
protective conductor (grounding).
2-11. In accordance with international safety
standards, this instrument
is
equipped with a three-
wire power cable. When connected
to
an
appropriate ac power receptacle, this cable grounds
the instrument cabinet. The
type
of
power cable
plug shipped with each instrument depends
on
the
country
of
destination. Refer
to
Figure 2-2 for
the
part
numbers
of
the power cable plugs available.
2-2
8120·
1378
8120·1351
•
8120·1369
8120·1689
Figure
2-2.
Power
Cable
and
Mains
Plug
Part
Numbers
Model 436A
2-12. ADDRESS SELECTION
I
WARNINGS
I
This task should be performed only
by
service trained persons who are aware
of
the potential shock hazard
of
working
on
an
instrument with protective covers
removed.
To avoid hazardous electrical shock, the
line (mains)
power
cable should be
dis-
connected before attempting to change
the HP-IB address.
Look
up the. address code in Table 2-3
..
Read
the
binary equivalent
of
the
code. Set
the
five least
significant bits
of
the
code on
the
address switch
as shown below. (The address switch
A6Sl,
is
on
the
HP-IB
Control
Assembly.)
5
least
significant
bits
of
the
address
code
read
from
Table
2-3.
The
switch is shown set for Talk address
"M"
(1001101) and Listen address
"-"
(0101101 ).
2-13.
Circuit Options
2-14. A jumper
option
is available for selecting a
filtered or unfiltered de RECORDER OUTPUT.
Table 2-2 lists
the
factory installed
jumper
connec-
tions and indicates
how
they may
be
reconnected
to
select the
option
.
2-15.
Interconnections
2-16.
Power Sensor.
For
proper system operation,
the
Power Sensor
must
be connected
to
the
Power
Meter using either
the
Power Sensor cable supplied
with
the
Power Meter
or
any
of
the
optional Power
Sensor cables specified in Section
I.
Each
of
these
cables employs a sensitivity line
to
enable
the
Power Meter
to
determine the operating range
of
the
Power Sensor and thus,
the
true value
of
the
input
signal.
For
example,
the
8481A
and

•
•
Model 436A
8481H Power Sensors provide identical full scale
outputs in response
to
input
signal levels
of
100
milliwatts and 3 watts, respectively. The dif-
erence in their sensitivity codes is detected
by
the
Power Meter, however, and
the
Power Meter digital
readout is automatically configured
to
indicate
the
appropriate value.
2-17. Hewlett-Packard Interface
Bus
Option 022.
Interconnection data for Hewlett-Packard Interface
Bus
Option 022
is
provided in Figure 2-3. Power
Meter programming and
output
data format
is
described in Section III, Operation. HP-IB address
selection
is
explained in Table 2-3.
2-18. Mating Connectors
2-19. Interface Connector.
The interface mating
connector
for
Option 022
is
indicated in Figure 2-3.
2-20. Coaxial Connectors.
Coaxial mating con-
nectors used with
the
Power Meter should be
US
MIL-C-39012-compatible type N male
or
50-ohm
BNC
male.
2-21. Operating Environment
2-22.
The
operating environment should be within
the following limitations:
Temperature
Humidity
Altitude
..
2-23.
Bench
Operation
....
0°Cto+55'°C
....
<95%
relative
<4570
m (15,000 ft)
2-24. The instrument cabinet has plastic feet
and
a
fold-away
tilt
stand for convenience in bench
operation. (The plastic feet are shaped
to
ensure
self-aligning
of
the instruments when stacked.) The
tilt stand raises
the
front
of
the
instrument for
easier viewing
of
the
control panel.
2-25. Rack Mounting
2-26. Instruments
that
are narrower
than
full rack
width may
be
rack mounted using Hewlett-Packard
sub-module cabin.ets.
If
it
is
desired
to
rack
mount
one Power Meter
by
itself, order half-module kit,
HP
Part Number 5061-0057.
If
it
is
desired
to
rack
mount
two
Power Meters side
by
side, order
the
following items:
a. Option
908
Rack Mounting Flange
Kit-
(For instruments without handles) HP
Part
Number
5061-9677.
b. Option
913
Rack Mounting Flange
Kit-
(For instruments with handles) HP
Part
Number
5061-9771.
Installation
c. Lock Link
Kit-Kit
consists
of
lock hard-
ware
and
screws
for
joining instrument cabinets in
several different configurations. Enough horizontal
links (12 front, 6 rear) for
three
side-by-side joints
(up
to
4 instruments), and enough vertical links
(4
front,
4 rear)
to
form
two
over/underjoints (up
to
3 instruments) HP Part Number 5061-0094.
2-27. Option
907
In
addition to
the
rack mounting
hardware, a front
handle
assembly (two provided) is
also availablefor
the
Power Meter. The
part
number
is
HP
5061-9689.
2-28. STORAGE
AND
SHIPMENT
2-29. Environment
2-30. The instrument should
be
stored in a clean
dry
environment. The following environmental
limitations apply
to
both
storage and shipment:
Temperature
...
-40°C
to +75°C
Humidity
....
<95%
relative
Altitude . .
<7620
m (25,000 ft)
2-31.
Packaging
2-32. Original
Packaging.
Containers and materials
identical
to
those used in factory packaging are
available through Hewlett-Packard offices.
If
the
instrument
is
being returned
to
Hewlett-Packard
for servicing,
attach
a tag indicating the type
of
service required,
return
address, model number,
and full serial number. Also mark
the
container
FRAGILE
to
assure careful handling. In
any
correspondence refer
to
the instrument by model
number
and
full serial number.
2-33. Other
Packaging.
The following general
instructions should be used
for
re-packaging with
commercially available materials:
a. Wrap
the
instrument
in
heavy paper
or
plastic.
(If
shipping
to
a Hewlett-Packard office
or
service center,
attach
a tag indicating the service
required, return address, model number, and full
serial number.)
b.
Use a strong shipping container. A double-
wall carton
made
of
275-lb test material
is
adequate.
c. Use enough shock-absorbing material (3
to
4-inch layer)
around
all sides
of
instrument
to
provide firm cushion and prevent movement in
the
container. Protect the control panel with
cardboard.
d.
Seal
the
shipping container securely.
e. Mark
the
shipping container FRAGILE
to
assure careful handling.
2-3

Installation
Assembly
A-D Converter
Assembly A3
~
b
5
~
b4
.i.
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
.
2-4
Model 436A
Table
2-2.
Circuit
Options
Service Jumper Functions
Sheet
8 The factory-installed jumpers provide a filtered
de
RECORDER
OUTPUT
which corresponds
to
the
average
power
input
to
the
Power Sensor.
If
ex-
ternal filtering is desired, reconnect
the
jumpers
to
provide
the
optional un-
filtered
de
RECORDER
OUTPUT as shown
on
Service Sheet
8.
Table
2-3.
USA
Standard
Code
for
Information
Interchange
(ASCII)
Oo
0
Oo
1
01
0
01
1
lo
0
lo
1
11
0
11
1
Column-+
b3
bz
bl
0 1 2 3 4 5
6
7
.i.
.i.
.i.
Row.I-
0 0 0 0
NUL
OLE
SP
0
@
p
'
p
0 0 1 1
SOH
DCl
! 1 A Q a q
0 1 0 2
STX
DC2
"
2 B R b r
0 1 1 3
ETX
DC3
# 3 c s c s
1 0 0 4
EQT
DC4
$ 4 D T d t
1 0
1 5
ENO
NAK
%
5 E
u
e u
1 1 0
6
ACK
SYN
&
6
F v f v
1 1 1 7
BEL
ETB
.
7 G
w
g
w
0 0
0
8
BS
CAN
( 8 H x h
x
0
0 1 9
HT
EM
) 9
I y
i
y
0 1
0
10
LF
SUB
* : J z j z
0
1 1
11
VT
ESC
+
. K
[
k {
1
0 0
12
fF
FS
<
L
\
I
I
.
I
1 0 1
13
CR
GS
-= M I
m }
1 1 0
14
so
RS
>
N
"'
n -
1 1 1
15
SI
us
I ?
0 0
DEL
-
" I
,
....
..,,
~
NOTE3
NOTEl
NOTE2
NOTE
1:
HP-IB valid LISTEN addresses
NOTE2:
NOTE
3:
HP-IB valid
TALK
addresses
Logic 1
=
OV
NOTE
3
•
•