HP 8756A Operation Manual

Errata

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8756A

OPERATION

MANUAL

SCALAR

This

manual

Scalar

2317A.

For
refer to
in Section I.

Network

additional

INSTRUMENTS

NETWORK

applies directly to

SERIAL

Analyzer

information

NUMBERS

having

ANALYZER

HP

serial

about

COVERED

Model

number

serial

BY

8756A

prefix

numbers,

MANUAL

©

Copyright

1400

FOUNTAIN

MANUAL

PART NO.

08756-90013

HEWLETT-PACKARD

GROVE PARKWAY,

COMPANY

SANTA

ROSA,

CA

95404

Ff/;'1

a:~

1983

U.S.A.

Printed:

AUGUST

1983

HEWLETT

PACKARD

INTRODUCTION

This
Service
It
preparation
both
with

The
make

(HP-IB)

individual

In
operate
understanding
operator

is

Following
Note(s)
specific
Network

the
operation

Operation

Manual

contains

manual

the

8756A.

convenience

it

well

test

Manual

as

a

1escriotion

for

use,

and

automatic

and
suited
eauioment

needs.

OPERATING INFORMATION

the

8756A

of

errors,

not

already

the

and

hiahly

OPERATING INFORMATION,

Programming

apPlication

Analyzer

8756A.

A

Programminq

(using

a

reference

accuracy
for

in
this
and

and
an

external

is

suPplied

of

as

well

test

a

variety

applications,

you

either

section

should

skilled

Notes.

(Basic

8350B

Sweep

Note,

document

the

instrument,

as

information

applications,

of

the

of

will

the

find

local

will

be

the

in

the

An

OPerating

Network

Oscillator)

on

controller).

with

the
for

8756A

bench
which

the

or

remote

help

first

to

stop

operation
you

will

Measurements

the

other

8756A
the

on

Scalar

top

may

information

eliminate

Note

hand,

Operating

Instrument

specifi~ations,

using

and

the

shoul~

Network

and

automatic

be

tailored

needed

mode.

for

of

find

A

a

multitude

the

operator

the

8756A.

Operatinq

illustrates

of

Usina

locallv

8756A

apPlies

and

Operator.

and

8756A

be

kept

Analyzer

to

your

to

thorough

a
Scalar

operating

to

remote

in

of

who

Under
on
specific
8756A's

Programming

teaching

controller.

remote

illustrated.

It

is

a

condensed
characteristics.
the

Quick

HP-IB

Reference

operating

you

how

capabilities,

The

information

Notes,

to

remotelv

It

Quick

Reference

descriPtion

Once

you

Guide

the

is

Introductorv

meant

HP-IB,

of

are

familiar

will

provide

without

program

to

be

and

Guide

the

8756A's

explanations.

Operating

your

an

introduction

use

is

controller

with
a

summarv

Guide

instrument

of

the

controller

HP-IB

oPerating

proaramming

of

all

focuses

with

to

a

the

independent.

the

8756A,

of

the

INTRODUCTION

CONTENTS

GENERAL

INFORMATION

Introduction
Soecifications
Safety

Considerations
Instruments
Description
Options

. . . . . . . • . .

Accessories
Equipment

Equipment

Reauired
Available

Hewlett-Packard

8756

System

Covered

Supplied

Interface

•.

....

Interface

INSTALLATION

Introduction

Initial
Preparation
Storage

Inspection
and

• . .

for

Use

Shipment

OPERATION . • . . •

OPERATING INFORMATION

Introduction
Operating
Operating
Operator's
Error
Front
Soft
Rear
HP-IB
CRT
HP
HP
Front

Messages

Panel
Key
Panel

Ooeratinq

Graphics
8756!\.
8756A

Panel
Operator's
Soft

Kev

Characteristics

Instructions

Operating

Modified
Status

Menu Map . . . . . . • .

. . . .

Checks

. . . . .

Operating

Operating

Features

. • . . . . . . • . . . . . • .

ASCII

Byte

Kev

Codes

Check

by

Manual

• . .

.•.

but

not

snoplied

. . . . • . . . . . . .

Bus

(HP-IB)

. . • . . .

. . . . . . • • . . . • . . . . .

..•...

Features

•............

Features

Features

. . .

Character

DescriPtions

Set

..•

. . . . . . . . . . • . .

..•...

l-1
1-1
l-1
1-2
1-2
1-2

1-3

l-4

1-4

l-4

1-~

l-5

/.-1

2-1

2-l

2-l

2-8

3-i

3-1

3-l

3-l

3-2

3-2
3-2
3-3

3-14
3-24

3-26

3-44

3-45

3-4n

3-4~

3-4n

3-53

OPERATING
PROGRAMMING

NOTES

NOTES

Model8756A

Installation

SECTION II

INSTALLATION

2-1.

2-2.
tions
Analyzer
includes information
damage
ment, packaging, storage,

2-3.

2-4.

damage.
material is
contents
completeness
checked mechanically
tents
Figure
performance are given in
instrument
mance
V

INTRODUCTION

This

section provides installation instruc-

for

the

Model

and

its accessories.

8756A

about

claims,

INITIAL INSPECTION

Inspect

If

of

preparation

the

the

shipping

damaged

the

shipment

and

shipping

container

it

should

the

instrument

and

of

the

shipment

1-1.

Procedures for checking electrical

does

not

should

pass the electrical perfor-

tests, refer to the adjustments

of

this manual.

If

a circuit

Scalar

This

Network

section also

initial inspection,

for using the instru-

and

shipment

container

or

cushioning

be kept until the

have

been

checked for

has

electrically.

be

Section

The

as shown

IV.

in

Section

malfunction

been

If

is sus­pected, refer to troubleshooting information
Section VIII.
above electrical tests,
are

incomplete,
damage
Packard
damaged,
signs

of
Hewlett-Packard
materials for carrier's inspection.

will arrange for

waiting for claim

2-5.

PREPARATION FOR USE

If

the

instrument

or

if

or

if

or

defect, notify the nearest Hewlett-

office.

or

If

the

cushioning

the

does

the

shipment

there

is

shipping

material shows

not

pass the

contents

mechanical

container

stress, notify the carrier as well as the

office.

repair

Keep

or

replacement without

the

The

shipping

HP

office

settlement

for

con-

in

the

in

is

2-8.

2-9.
tion
Module
the line voltage

a.

b. Refer to Figure

Line

Voltage

Figure

card

and

on

the

Measure

panel
voltage

power line module, select the line

(100,

2-1

the ac line voltage.

and Fuse

illustrates the line voltage selec-

fuse location

rear

panel

and

fuse as follows:

2-1.

120,

220,

in

of

At

the

or

240 volts) closest to

the voltage you measured

Selection

the Power Line

the

87

56A

instrument

in

step

the available line voltage must be within

or

+5%

-10%
as shown in Table
use

an

autotransformer

Voltage

105

volts

126

231

and

2-1.

volts

volts

source

Table

Measured

ac

Line

90 to

108

to

198

to

216 to 252 volts

of

the line voltage selection

2-1.

If

it is not, you

between the power

the

87

56

A

Line Voltage/Fuse Selection

PC

Selector

Board

Position

100

120

220

240

HP

Part

2110-0002

2110-0002

2110-0043

2110-0043

a.

Fuse/

Number

2.0A

2.0A

1.5A

1.5A

Select

rear

Note

must

2-6

Power

2-7

The
Analyzer
220,

or
single-phase. Power
imately

Requirements

Mode

I 8756A

Seal

requires a power source

240 Vac, +5% to

-10%,

consumption

100

volt-amps.

a r

Network

of

100,

50

to 60 Hz,

is approx-

120,

c.

Make
the fuse holder.
each line voltage
and

below the power line

rear

panel

sure the correct fuse is installed

The

required fuse rating for

is

indicated in Table

of

the 8756A

module

on

in

2-1
the

2-1

Installation

Model8756A

RECEPTACLE

PC

SELECTOR

FOR

115/120

OPERATING

FOR

BOARD

VAC

PRIMARY

SHOWN

POWER

VOLTAGE

LINE.

POWER

CORD

POSITIONED

APPEARS

\

IN

MODULE

Figure 2-1.

WINDOW.

Power

Line

Module

SELECTION

1.

SLIDE
AND

REMOVE

2.

PULL
POSITION
NEAREST

WILL

BOARD

3.

PUSH
RIGHT-HAND

4.

CHECK
RECT
LINE
FERENT

BELOW

5.

INSERT

OF

OPERATING

OPEN

POWER

PULL

FUSE-PULL

FUSE.

OUT

VOLTAGE-SELECTOR
PC

BOARD

ACTUAL

APPEAR

IN

LINE

MODULE

INTO

LEVER
POSITION.
TO

MAKE

AND

FUSE

VOLTAGES
MODULE.

BACK

FUSE-PULL

FUSE

RATING

VOLTAGE.

POWER

CORRECT

MODULE

LEVER

SO

LINE

ITS

SLOT.

SURE

TYPE

RATINGS

FUSE

VOLTAGE

COVER

TO

PC

THAT

VOLTAGE

VOLTAGE

WINDOW.

INTO

ITS

IT

IS

FOR

INPUT

ARE

INDICATED

IN

FUSEHOLDER.

DOOR

LEFT

BOARD.

LEVEL

PUSH

NORMAL

OF

COR-

AC

FOR

DIF-

TO

To

prevent

ment,

make

damage

the

correct

to

the

line
and fuse selection before connect­ing

line

power

to

the

instrument.

NOTE

The

8756A

tory

installed fuses

operator

contains internal fac-

which

serviceable

or

able.

2-10.

2-11.
standards,
three-wire
approptiate
the
styles
plied
bers for

POWER CABLE

In

accordance

this

instrument

power

power

instrument

of

plugs available

with

HP

instruments.

the

plugs

with

international
is

cable.

When

line outlet. this

cabinet

Table

on

The

are

part

equipped

connected

power

numbers

instru-

voltage

are

not

replace-

safety

with a

cable

grounds

2-2 shows

cables sup-

HP

Part

Num-

for

to

an

the

the

complete
plug
the

power

shipped

country

Before
ment,

with

of

switching

be
specified
instrument
three-wire
grounds
This

power
inserted in a
with a protective
This

protective

be

negated
sion cord
protective
Grounding
conductor
protection.

cables.

The

the

instrument

type

of

destination.

WARNING

sure

power

is

power

the

instrument

cable is used.
provided

on

that

cord

I

this

only

cord should only be

socket

outlet

earth

action should

by

the

use

of

an exten-

(power

conductor
one
outlet

cable)

conductor

is

not

without

(ground).

sufficient

power

depends

instru-

the
The

with

which

cabinet.

provided

contact.

not

of a two-

cable/

upon

a

a

2-2

Mode18756A

Table

2-2.

AC

Power Cables Available

Installation

Type

250V

1

Plug

~

250V

Sl20-1369

s 120-069()

u

250V

@

125V

t91

SI20-16R9
Xl20-lf>92

RI20-134S
R 120-139S

s 120-1 7 54

S 120-137S
Sl20-1521
Xl20-1676

Cable

HP

Part

Number

Rl20-1351
Sl20-1703

3

co

2

0
6

()

4

7

2

5
5
7

I

6

2

Plug

Straight

90°

Straight

90°

Straight

90°

Straight
90°
Straight
Straight
90°
Straight

Description

BSI363A

NZSSI9R/ASCII2

CEE7-VJJ

NEMA5-15P

NEMA5-15P
NEMA5-15

NEMA5-15P

2

P

Length

(inches)

90
90

79
S7

79
79

so
xo

36
RO

so

36

Cable

Cable

Color

Mint
Mint

Gray
Gray

Mint
Mint

Black
Black

Black
Jade
Jade
Jade

Gray
Gray

Gray
Gray

Gray
Gray
Gray

For

Use

United

Zealand

and

(unpolarized

lOOV

Kingdom.

Nigeria.

Arabia.

nations)

States.

or

Cyprus.
Zimbabwe.

Australia.

New

East

Saudi

Republic
India
many

United
Canada.
(
Mexico.
Taiwan

in

Country

Singapore

West

Europe.

Egypt.

of

So.

Africa.

Japan

200V).

Philippines.

in

250V

~

E

250V

@

220V

EJ

250V

I

I·=

Ltrth

~

P.trt

nllmhcr

incllldin!,!

'

ThL'

Chcc

he·

k

'llpplicd

s 120-2104

S I 20-06lJX

Xl20-1957

s 120-29:'i6

X 120-1

Cirollnd:

,Jwv.n

plut!

[)igi

t ( C

v.ilh

X60

I.=

Line:

lin

pill!,!

l))

i"

a coded digit that

the

liP

P.trt

3

()

:\I=

i'

indll\tr\

:--.:umhcr

Straight

24507.

Straight

Straight

900

Straight

(System

1\:clltral

idcntilicr

rcrrc-..cnh

v.hcn

SEVIOII

Type

12

NEMA6-15P

DHCK

CEE22-VI
Cabinet

for

pill!,!

the

<)rdcring

107

lise)

"PLL'i

.ttl\

195l)

on!\

ufthc

Nurnhcr

fiL·

con1

hi

puv.cr

'hown

nation

.t"ctnhlic,

7l)

79
79

for

of n urn

cahlc

her-.,

Ji,tcd

(iray

Gray
Gray

i'

H P

u~cd

.thmc.

Switzerland

United

Denmark

Part

Nllrnhcr

in

the H P Part N

to

expedite

States.

lin

complete

un1

'peeL!\

her.

Canada

It

~hou

deli\

cahlc

ld

cry.

2-3

Installation

2-12.

tor

is

offset

the

grounding

pin

of

pin.

the

The

8756A from a two-contact

grounding

feature

may

be

three-prong to two-prong

tors only,

necting

HP

the

Part

green

Number

wire

ground.

three-prong
When
outlet,

the

connec-

operating

protective

preserved by using a

adapter

of

(USA connec-

1251-0048)

the

adapter

and

con-

Model8756A

the

to

2-13.

2-14.
control with
bus
The
and
on
may

HP-IB Address Selection

When

refers to

8756A is preset

the 8756A is used

the

HP-

IB, the controller

the

8756A by

in

firmware to address

is differentiated from

the

bus

by this address.

be

modified

by a front

an

any

The

under

HP-IB

other

HP-IB

panel

remote
on

the

"address".

16,

instrument

address

SHIFT

function.

2-15. Twenty-nine different address codes are

29).

The

available (I to

8756A is
the factory preset to address
8756A instruments,
read

by the processor from firmware
tial power
remain
resetting

[LOCAL] function.

on

in effect until the address is

through

read directly from

[SHIFn

is

then
address
played,
to

terminate
show

[LOCAL].

displayed

must

enter

the

new

be

the

the entry.

not affected by
by a

PRESET

the

only. This

the

The

the

The

on

the

changed

new

address

The

HP-

IB address.

turning

command.

HP-IB

front

HP-IB

front

current

from

the

HP-IB

CRT.

display

LINE

shipped

16.

In

all

standard

address will be

upon

address will

changed

panel

address

panel

[SHIFn

may

by pressing

HP-IB address

If

the

that

which

and

press

should

This

address is

switch off,

from

ini-

by
be

HP-IB

is

dis-

[ENn

now

2-16. HP-IB address labels are available by

ordering

(See

reference to the HP-IB address

HP

Figure

Part

2-2).

Number
These

7120-6853 (each).

labels

allow

of

each system

easy

component.

2-17.

2-18. All
of
each
tion, the
and
the
the externally
refer to Section

Mating

Connectors

of

the externally

the 8756A are listed in

8756A

the

mating

connector

part

part

number

connector.

number

of

mounted

VI.

Replacable

is

an

of a mating

an

For

connectors themselves.

mounted
Table

connectors

2-3.

Opposite

industry identifica-

connector.

alternate source for

HP

part

numbers

Parts.

of

or

Figure

2-19.

Interface Connectors and Cables

2-20.

HP Interface Bus and

The
tor is located
A10J2 allows the 8756A to

controller via
instruments.
and

signals

is given

2-21.

located

The

on

allows the 8756A to

or

8340A swept microwave sources,

7470A

or
controls the 8756 System Interface,

be

must

connector
2-22. All

or

the 8756 System Interface Bus are intercon-

nected by

available HP-IB Cables
is

given
instruments may be
HP

Interface Bus
To achieve design
per

voltage levels
be maintained.
if

the

accumulated

instruments

cannot

lines

2-2.

HP-IB Address Label

HP

Interface Bus Interface

on

the

rear

panel

in

Figure

An

on

HP-IB, with

illustration

the

HP

2-3.

or

of

Interface Bus

8756 System Interface

the rear

panel

be

connected

of

9872C digital plotters.

no

other

controllers

(see Figure 2-3).

instruments

HP-

IB Interface Cables. A list

on

the

and

in

Figure

2-4.

connected

or

the 8756 System Interface.

performance

and

timing relationships

If

the system cable is too long

cable

is

too long, the

be driven properly

8756

System

Connec-

of

the 8756A.

be

connected

without

pin

configuration

additional

to a

connector

Connector

the 8756A. A10Jl

to the 8350B

and/

or

The

8756A itself

and

there

attached

HP

Interface Bus

to this

of

their

part

numbers

As

many

in

parallel

on

the bus, pro-

as
on

must

length

data

and

between

and

control

the system

is

the

the

15

the

or

may fail to perform. Therefore. the following

must

restrictions
a.

With two instruments in a system, the cable
length must

be observed:

not

exceed 4 metres (12 feet).

2-4

Model8756A

Installation

GROUNDED

TERMINATION

OTHER

TWISTED

NEAR

WIRE

PAIR

OF
OF

P/0

TWISTED

P/0

TWISTED
P/0
P/0

P/0
P/0

8756

SIGNAL

TWISTED
TWISTED
TWISTED
TWISTED

SYSTEM INTERFACE CONNECTOR

and HP INTERFACE BUS CONNECTOR

(as viewed from rear

GROUND

PAIR

WITH

PAIR

WITH

PAIR

WITH 9 '-..._

PAIR

WITH

PAIR

WITH

PAIR

WITH 6 --

~::~;~~

LD106

~

11

\\

10

~

-

8

~

7 -

~

L

REN

/-:/16

I I

24

23

"'\

""'

22

21

20

19
18

17

:~

of

instrument)

-

7

6

--

:

~

~

~

~

A1

OJ1

A1

OJ2

(CONNECTED
EARTH

GROUND)
SHIELD
LATN
L

SRQ

LIFC

L

NDAC

LNRFD

LDAV
LEOI
LDI04

LOI03

TO

HP-IB

Logic

True

(low)

NOTE:

Mnemonics

Interface;

LATN

LDAV

L
LEOI
LIFC
LNDAC
LNRFD
LREN
LSRQ

Levels:

State

s0.8

on

L ADI05= H P

Mnemonic

DIOl

through

Vdc;

the

wiring

Interface

Fal~e

(high)

list

Bus)

8

for

A1

State

OJ1

L

DI05

?.+2.4

Vdc.

and

A 1

OJ2

are

MNEMONICS

\

coded

Band A to

LOW=
LOW=
LOW=
LOW=
LOW=
LOW=
LOW=
LOW

= Remote

LOW

= Service Request control line

differentiate

TABLE

Description

Attention control line

Data

Valid control line

Data

Input/Output

End

Or

Identify control line
Interface
Data
Not

Clear

Not

Accepted control line

Ready

For

Enable

~~:~:

between

the

two.

lines

control line

Data

control line

control line

(L

BDI05=8756

System

Figure

2-3.

8756A System Inteiface Connector and HP-IB Connector Signal/Pin Configuration

2-5

Installation Model 8756A

Table

2-3.

Model8756A Mating Connectors

8756A

JlA

Panel)

12

J3R

Name

B

Panel)

Panel)

Connector

(Front

(Front

(Front

* AlOJl 8756 System Interface

(Rear

Panel)

* Al012

HP

Interface Bus

(Rear

Panel)

Al

013

Pos Z

(Rear

Panel)

Al014 Sweep In

(Rear

Panel)

Blank

Connector

Industry

Audio

Audio 5-Pin

Audio 5-Pin

24-Pin Micro

24-

Identification

5-Pin

Pin

Micro

BNC

BNC

Connector

Connector

Connector

Ribbon

Ribbon

HP

Part

1251-1865

1251-1865

1251-1865

1251-0293

1251-0293

1250-0256

1250-0256

Mating

Number

Connector

Alternate

Switch craft

12

Switch craft

12

Switchcraft

12

Am

57-30240

Am

57-30240

Specialty

25-Pll8-l

Specialty

25-Pll8-l

Source

CLSM

CLSM

CL5M

phenol

phenol

Connector

Connector

Al

015

Stop Sweep

(Rear

Panel)

14

Modulator

(Rear

Panel)

15

Modulator

(Rear

Panel)

16

Modulator

(Rear

Panel)

17

Display

(Rear

18

Display

(Rear

19

Display

(Rear

*Refer to Figure

are given in Figure

Output

Panel)

Output

Panel)

Output

Panel)

2-4

Drive 1

Drive 2

Drive 3

X

Y

Z

for HP-IB Interface
2-3.

8756 System Interface

Cable

BNC

BNC

BNC

BNC

BNC

BNC

BNC

information.

Connector

HP-

IB Interface

AIOJl signals

1250-0256

1250-0256

1250-0256

1250-0256

1250-0256

1250-0256

1250-0256

connector

and

pin

Specialty

Connector

25-Pll8-l

Specialty

Connector

25-Pll8-l

Specialty

Connector

25-Pll8-l

Specialty

Connector

25-Pll8-l

Specialty

Connector

25-Pll8-l

Specialty

Specialty

AI

012

signals

configuration are given in Figure

and

Connector

25-

Pll8-l

Connector

25-

Pll8-l

pin configuration

2-3.

2-6

Model8756A

Figure 2-4. HP-IB Interface Cables Available

b.

When
nected
instrument

more

than

two

instruments

on

the bus, the cable length to

must

not

exceed 2 metres

feet).

c.

The

total cable length between all units

must

not

exceed

2-24.
2-25.

operated

2-26.

operated
5%
the 8756A

Operating
Temperature.

in temperatures from

Humidity.

in

to

80%

relative at +25°C to +40°C. However,

should

environments

extremes which cause

20

metres

Environment

The

instrument

The

instrument

with

be

protected from

condensation

(65

feet).

ooc

to +55°C.

humidity

temperature

instrument

2-27.

operated
imately

2-28.

should
the
The
bench
mounting
cabinet
the 8756A pulls
though
exhaust

Altitude.

at altitudes

The

instrument

up

to 4572 metres ( approx-

15,000 feet).

Cooling.

be

cabinet

at

least

and

Clearances

10

em

(4

7.6

em

(3

for

ventilation

inches)

at

inches) at the sides.

clearances provided by the plastic feet in

stacking

are

surfaces.

the sides.

and

adequate

The

fan

air

into the

Insure

the filler strips

for the top

mounted

and

on

instrument

that

the

air

venting holes are not obstructed within

the limits given above.

are con-

may

may

within

may

the

rear

in

bottom

the

rear

and

intake

each

(6

be

be

from

the

be

of

rack

of

out

and

Installation

HP-18

Cable

Part

Numbers

HP

10833A

HP

10833B

HP

10833C

HP

10833D

2-29.

2-30.
Front
cessary

for
ment
Figure
ordered as

2-31.

2-32.
Rack
necessary
tions for
an

Front

When

rack

correct

installation figures in

of

the
screw
specified
damage

located behind
ing holes in

Handles

installing

mount

screws,

manual, are used. Use

which

length

to

Instruments
Handle

Kit

hardware

mounting

two front

Installation

2-5.

Additional

HP

Part

Rack

Mounting

Instruments

Mount

Kit.

hardware

preparing

equipment

rack

kits, insure

is

internal

the

with

This kit supplies the nec-

and

instructions are also given in

Number

with

the

with 482.6

Lengths

1m

(3.3 ft.)

2m

(6.6 ft.)

4 m (13.2ft.)

0.5 m (1.6 ft.)

(Option

front

specified

longer

may

the

insrument.

Option

907)

handles and

that

in

this

section

than

result

components

screw

mount-

907

contain

the
the

of

the

a

in

installation instructions

handles

Option

on

the instru-

907

Kits may be

5061-0090.

(Option

Option

This

and

kit

installation

instrument

908)

908

suppplies

to

mm

(19 in.) sup-

contain

instruc-

mount

the

on

port spacing. Installation instructions are also

2-6.

given in Figure
may be

ordered

Additional

as

HP

Part

Option

Number

908 Kits

5061-0078.

a

a

2-7

Installation

Model8756A

2-33.

(Option

2-34.

Rack
bination
908

hardware
paring

rack with 482.6

with the

instructions

Additional

HP

2-35.
2-36.

2-37.
shipped

Rack

909)

Instruments

Mount

of

the

Kit.

This
and

the

instrument

addition

Option

Part

Number

STORAGE

Environment

The

instrument

in

environments

Mounting

with

Kit with

Option

kit

with

Option
Front
907

Kit

supplies

Front Handles

909

contain

Handles. a com-

and

the

Option

the

necessary

installation instructions for pre-

to

mm ( 19

are

mount

in.)

of

front handles.

also

given

on

equipment

support

Installation

in

Figure

spacing,

909 Kits may be ordered as

5061-0084.

AND

SHIPMENT

may
within

be

the following

stored

2-7.

or

limits:

Temperature

Humidity...

. . . . . .

5%

to

-40oC

95%

to +75oC

relative at

0°

to +40°C

2-38.

Altitude..

(Approximately

The

. . . . . .

instrument

Up

to 15240 metres

50,000 feet)

should

be

protected from
temperature extremes which may cause conden­sation in the instrument.

2-39.

Packaging

offices. A complete

diagram
kaging materials used for the 8756A is
Figure

a

Hewlett­indicating
address,
(located
container
In
by

2-41.

general instructions

2-9.

If

the

instrument

Packard

the type

model

on

FRAGILE

any

correspondence, refer to the

model

number

Other

for servicing,

number,

rear

panel

and

Packaging.

of

to assure careful handling.

should

kaging with commercially available

and

listing

shown

is being

returned

attach

service required,

and

full serial

serial plate).

number

Mark

instrument

full serial number.

The

following

be

used

for repac-

packaging

of

pac-

a tag

return

the

in
to

materials:
a.

Wrap
plastic.
Office
indicating
return

the

instrument

If

shipping

or

Service

the

address.

in heavy

to a Hewlett-

Center,

type

of

model

paper

Packard

attach

a

service required,

number,

and

full

or

tag

serial number.

b.

Use a strong

c.

Use
around
vide a firm
ment
control

d.

Seal

e.

Mark

enough

inside

the

the

shipping

all sides

cushion

the

panel

with cardboard.

shipping

shipping

container.

shock-absorbing

of

the

instrument

and

to prevent move-

container.

container

container

securely.

FRAGILE

material

tp pro-

Protect

the

to

assure careful handling.

2-40.

Original Packaging.

Containers
materials identical to those used in factory pac­kaging are available

through

Hewlett-

2-8

and

Packard

f

In

any

ment

by

number.

correspondence, refer to the instru-

model

number

and

full serial

Model8756A

Installation

1.

REMOVE

2.

ATIACH

3.

PRESS

Item

2

3

4

Qty.

2

6

2

SIDE

TRIM

FRONT

HANDLE

FRONT

HANDLE

HP

Part

5060-9900
2510-0195
5020-8897

STRIPS

TRIM 4 IN

OPTION

No.

Figure

INSTALLATION

1.

ASSEMBLY 2 WITH

PLACE.

907

(HP

Part

No.

c

D

0

6

8

2-5.

Option 907 Front Handles Kit

INSTRUCTIONS

FOUR

8-32 x 3/8

5061-0090)

CONTENTS

Front
#8-32
Front

SCREWS 3 PER

Description

Handle

x 3/8 Screw

Handle

Assembly

Trim

SIDE.

2-9

Installation

Model8756A

1.

REMOVE

2.

ATIACH

3.

REMOVE

OPTION

Item

2

3

Qty.

2

6

HP

Part

No.

5020-8863
2510-0193

Figure

2-10

INSTALLATION

SIDE

TRIM

RACK

MOUNT

FEET

AND

908

(HP

c

D

8

7

2-6.

INSTRUCTIONS

STRIPS

TILT

1.

FLANGE 2 WITH

STANDS 4 BEFORE

Part

No.

5061-0078)

Option 908

Rack

8-32 x 3/8

RACK

CONTENTS

Rack
#8-32

Mount

SCREWS
MOUNTING.

Description

Mount

Flange

x 3/8 Screw

Kit

3.

Model8756A

Installation

1.

Item

2

3

4

REMOVE

2.

ATIACH
SCREWS 4 PER

3.

REMOVE

Qty.

2

2

6

SIDE

TRIM

RACK

MOUNT

SIDE.

FEET

AND

HP

Part

5020-8875
5060-9900
2510-0194

Figure

INSTALLATION

STRIPS

TILT

OPTION

No.

1.

FLANGE 2 AND

STANDS 5 BEFORE

909

c

D

2

0

8

2-7.

Option 909

(HP

FRONT

Part

INSTRUCTIONS

HANDLE

RACK

No.

5061-0084)

ASSEMBLY 3 WITH

MOUNTING.

CONTENTS

Rack
Front
#8-32

Rack

Mount Kit with Handles

Description

Mount

Handle

Flange

Assembly

x 5/8 Screw

FOUR

8-32 x 5/8

2-11

Installation

Model8756A

R

1.

EMOVE

RACK

2-12

INSTALLATI

MOUNT

F

LANGE 3 AND/OR

ON

INSTRUCTIONS

nstru Preparation

oifl

FRONT

HAND

mentforSh"

LE

ASSEMBLY.

zpment

1

2.

Model8756A

Installation

Ref.

Desig.

1

2 08756-80009 2
3

4 9211-4499 7

5 9222-0069 2

HP

087

087

Figure

Part

56-800

56-80010 5

2-9.

Number

11

Packaging for Shipment Using Factory Packaging Materials

CD

6

Rear

Spaces­Carton -Inner
Side Rail
Carton -Outer
Poly

Bag-

To

Description

Corrugated

Cover

Instrument

(Not

Shown)

2-13/2-14

GENERAL

SAFETY CONSIDERATIONS

This product

markings

accordance with international standards.

SAFETY SYMBOLS

WARNING

._

____

and

related documentation must be reviewed for familiarization with safety

and

instructions before operation. This

Instruction
when it
Table

Indicates

Indicates earth (ground) terminal.

1

The

WARNING

_.

practice,
personal injury.
indicated conditions are fully understood

manual

is

necessary for the user to refer to the instruction

of

Contents).

hazardous

or

the like, which,

symbol: the product will be marked with this symbol

sign denotes a hazard.

Do

product

voltages.

if

not correctly performed could result in

not

proceed beyond a

has been designed

It

calls attention to a procedure,

WARNING

and

met.

and

tested in

manual

sign until the

(refer to

The

CAUTION
procedure, practice,
to,

could result in damage to
not proceed beyond a
fully understood

SERVICING

Any

servicing. adjustment. maintenance. or repair

personnel.

Adjustments described in this
protective covers are removed. Energy available at
injury.

manual

sign denotes a hazard.

or

the like, which,

CAUTION

and

met.

I

WARNING

may

be performed with power supplied

or

destruction

I

of

this product

many

points may,

It

calls attention to

if

not

correctly performed
of

part

or

all

sign until the indicated conditions are

must

be performed only by qualified

if

contacted. result

an

operating

or

adhered

of

the product.

to

the product while

in

personal

Do

General

Information

Model8756A

8756A

SCALAR

NETWORK

ANALYZER

*POWER

FOR

PART

Figure 1-1.

POWER

CABLE/PLUG

NUMBER

CABLE*

SUPPLIED

INFORMATION.

Model8756A

1-0

DEPENDS

Scalar

ON

COUNTRY

Network

OF

DESTINATION.

Analyzer

HP-IB

and

INTERFACE

REFER

Accessories

CABLE

TO

SECTION

Supplied

II

Model8756A

SECTION I

GENERAL INFORMATION

1-1. INTRODUCTION

1-2.

This

Operating

tains

information
test, adjust,
Model
1-1
plied
tion, description, options, accessories, specifi­cations,

1-3.

which

a.

b.

c.

d.

e.

8756A

shows

This

This

provide

SECTION
includes a brief

ment, safety
supplemental
identification,
sories available,
test

SECTION

information
tion
nectors, storage

SECTION
three

operating

information
operation
Notes

IB
SECTION

contains

instrument
with

SECTION

information

and

and

Scalar

the

instrument

section covers

and

other

manual

information

I,

equipment.

for use,

subsections

which

use

of

the

information

published

align

the

and

Service

required

service

Network

basic

is divided

GENERAL

description

considerations,

characteristics,

options

and

II,

INSTALLATION,

for initial inspection,

rack

and

III,

OPERATION,

information,

(not-HP-IB),

information

provide

87

56A).

IV,

PERFORMANCE

performance

specifications.

V,

ADJUSTMENTS,

required

instrument

to install, operate,

the

and

instrument

information.

as follows:

a list

mounting,

shipment.

which

information

required

to

manual

Hewlett-

Analyzer.

accessories sup-

into

eight sections

INFORMATION,

of

specifications,

available,

of

recommended

contain

local

and

(Programming

is in

properly

after repair.

con-

Packard

Figure

identifica-

the

instru-

instrument

acces-

provides
prepara-

mating

consists

to verify

accordance

con-

general

operation

remote

on

HP-

TESTS,

that

contains

adjust

of

f

SECTION
contains
parts

and

g.

SECTION
CHANGES,
tion to
earlier

h.

SECTION
overall
troubleshooting
Each
covered
contains
diagram,
troubleshooting
proper

1-4.

Supplied
Information
copy

of

the

and

should

by

the

operator.

ing

Information
through
The

1-5.
is

a Microfiche

be

used
cies
to

60
microfiche
Manual
tinent

1-6.

1-7.
Table
mance
instrument

your

part

number

Also listed

to

order

of

the

manual.

photo-duplicates

Changes

Service Notes.

SPECIFICATIONS

Instrument

1-1.

standards

General

VI,

REPLACEABLE

information

assemblies.

VII,

MANUAL

contains

make

this

equipment

VIII, SERVICE,

instrument

assembly within the

on a separate

a circuit description,

component

maintenance

with this

Supplement.

first

three

be

kept with

Additional

Supplement

nearest

is listed

on

the title page

part

4x6-inch microfilm

Each

package

supplement

specifications

These

is

specifications

or

tested.

required

backdating
manual
configurations.

block

and

repair

Service Sheet

location diagram,

information

of

the

manual

The

Supplement

sections

the

instrument

copies

can

Hewlett-

on

the title page.

number.

of

also

limits

Table

This

microfiche

the

manual

includes

as well as all per-

against

1-2

Information

PARTS,

to

order

BACKDATING

informa-

compatible

provides

diagram

procedures.

instrument

schematic

to

aid

instrument.

is

an

Operating

of

this

of

the
be

Packard

of

this

number

transparen-

contains

pages.

the

are

listed

are

the perfor-

which

lists

supplemen-

all

with

an

with

which

and

in

the

is a

manual,

for use

Operat-

ordered

office.

manual

can

up

The

latest

in

the

is

1-1

General

Information

Model8756A

tal characteristics.
are

not

specifications

tics

included

Supplemental

as

additional

but

are

user.

1-8.

1-9.
tested in
standards.

related
familiarization
instructions. A
siderations

1-10.
MANUAL

1-11.

ment
serial
digits

SAFETY

This

CONSIDERATIONS

product

accordance

has

been

with

Before operation, this

documentation

with

must

safety

complete

precedes Section I

INSTRUMENTS

SERIAL

PREFIX

,.-'----,

SER

1234A

FACTORY}

INSTALLED

OPTIONS

Figure 1-2. Ty pica! Serial

Attached

is a serial

number

and

letter

OPT

r7,+~

~f.LJ

HEWLETT • PACKARD

to

the

number

is

in

two parts.

are

the serial

001

rear

listing

COVERED

MADE IN

plate

last five digits are the suffix.
same
only
The
and
tents
the
SERIAL

1-12.
printing
ber
unlisted
instrument
this
ment

Changes

for all identical instruments; it

when a change

suffix, however,

is

different for

of

this

manual

serial

number

NUMBERS

An

instrument

of

this

prefix

that

is

serial

is

each

apply

on

manual

not

listed

number

made

is

assigned sequentially

instrument.

prefix(es)

the

manufactured

may

on

prefix

is different from those described in

manual.

is

The

manual

accompanied

supplement.

for this newer instru-

by a

This

supplement

characteristics

typical characteris-

information

for the

manufactured

international

safety

product

be

reviewed for

markings

of

of

NUMBER

SUFFIX

r-""-.

12345

Number

panel

(Figure

number

The

Safety

this

USA

of

The

prefix

Con-

manual.

BY

Plate

the instru-

1-2).

first four

prefix; the

is

changes

to

the

instrument

The

con-

to

instruments

listed

with

under

title page.

after the

have a serial

the title page.

num-

This

indicates

yellow

Manual

contains

and
and

and

The

the

the

'change

the
1-13.

supplement
recting
manual
Hewlett-

information'

manual

In

addition

errors

as

Packard

to the

may

contain

in

current

recommends

that

newer

to

the

and

ically request the latest
plement.
identified with this

number,
title page.
ment

1-14.
number
or

in

your

1-15.

1-16.

Analyzer

is

capable
reflection
RF
cies.
over
and

or

sweep
through
manual
the

connection
the A
and

1-17.
controls

identical

The
step keys,

measurement
Soft Key menus.
allows storage

provides for a
the

The

supplement

manual's

both

of

which

Complimentary

are available from Hewlett-Packard.

For

information

prefix

the

nearest

DESCRIPTION

The

that

Manual

Hewlett-

Model

is

not

Changes

Packard

8756A

is a microprocessor

of

making

and

transmission

(radio

the

can

frequency)

The

8756A

Hewlett-Packard

control a plotter

is

completely

oscillator

the

8756 System Interface. A

measurement

of

detector(s)

B,

orR

detector

the

use

of a compatible

The

CHANNEL

the

operation

Entry

channels,
area

or

keypad.
data,

allows

and

data

channel

The

and

recall

PRESET

status

of

the

instrument

operation.

1-18.

SET] is pressed,

forms
proper
functions.
test, they are

Upon

an

initial

internal

operation.

If

errors

indicated

power

the

8756A

hardware

and

or

failures

explains

how

to

instrument.

change

manual.

Manual

appear

information,

information

To

accurate

that

Changes

for this

print

date

on

the

copies

of

concerning

listed

on

the

supplement,

for cor-

keep

as possible,

you period-

manual

and

manual's

the supple-

a

title page

contact

office.

scalar

Scalar

based

(magnitude

Network

receiver.

measurements

and

microwave frequen-

programmable

Interface Bus (HP-IB),

(HP

(HP

7470A

8350B

or

or

9872C)

8340A)

complete

with

the

inputs

8756A

and/or

on

the

requires

bridge(s) to

front panel,

source.

area

on

the

front

of

two

independent,

three

The

detector inputs.

entry

using

Display

the

shows

information,

Instrument

of

the

of

the

8756A

on,

State

instrument

and

under

or

remote

after [PRE-

automatically

initializes

on

the

check

occur

CRT

to verify

certain

during

Display.

adapt

the

this

sup-

is

part

serial

It

only)

at

panel

but

knob,

the

and

area

state,

shows

per-

this

1-2

Model8756A

General

Information

1-19.

1-20.
select

POWER] (A. B, R), [DISPLAY]

Memory,

[SCALE] (20,

sion),
the

PLAY--.MEM],

(which
Reference
CRT

1-21.

1-22.
entered

(knob,

1-23.

1-24.
CRT
above
Scale
Cursor
channel
graticule. Soft Keys
keys to
functions

of
(Averaging
(Short/Open

[PLOT]

7470A
ON/OFF,
(Modulation

1-25.

Five Key Channel Operation

Five

front

[MEAS

or

and

[REF]

[SHIFT] key

scales

Level so

panel

RATIO]

keys for

(NR

Measurement
10,

5,

2,

I,

.5,

(LEVEL

enables

[MKR--.REF],

the

data

that

B/R

minus

.2,

or

POSition).

[CHAN

and

the

Display).

Data Entry

Data

Data

Display.

the

per

for

the

using

step keys,

Digital Display

value.

activated

the

one

or

for

both

The

graticule,

Division,

The

is

immediate

of

keypad).

Channel

annotates

Reference

Reference

shown

various

the

Entry

channels

on

may

be

right

of

functions

Annotation

the

Position
the

enabled

the

include: [CURSOR]

the

cursor

(outputs

or

Instrument State and SAVE/RECALL

for

both

channels),

Factor,

Averaging

calibration

the

current

ON/OFF),

and

display

9872C Plotter), [DISPLAY]

Hold,

Menu

ON/OFF,

OFF),

Service).

each

channel

NB),

[MEAS

(Measurement,

Memory),

or

.1

dB

per

Use

OFF], [DIS-

and

[AUTO]

changes

data

fits

on

may

area

functions

is

shown

on

Measurement,

Level value,

for

left

side

using

display.

(reads

[AVERAGE]

Detector

the

Offset),

to

an

These

[CAL]

(Labels

and

[MORE]

divi-

the

the

be

the

area,

and

each

of

the
the

value

HP

of

drift-free
is

square-wave
vides
reflection.
detected
to

an

shaping,

1-29.
kHz
the
rear
drive

(8340A)

drive
source

1-30.
1-31.

1-32.
contains
necessary

operation.

the

source

or

and

8756A

the

The

modulation

modulation

three

Modulator

panel

the

of

an

of
external

the

external

without

OPTIONS
Option

Option

a

hardware

modulated

for

transmission

the

modulation

detector

data

the

RF

internal

907,

907

pair

the 8756A. Refer to
and

Service

this kit

1-33.

1-34.
contains a pair
hardware
rack

with 482.6
ing. Refer to
Service
this

kit

1-35.

Kit

dles

Manual

and

instructions

Option

Option

to

Manual

and

instructions

Option

908,

908

of

mount

mm ( 19

Section

909,

An

RF

or

microwave

at

27.8 kHz.

the

8756A.

Absolute

signals

envelope

input. After filtering

is digitized

drive

is

available
Drives

8756A.

AM

or

microwave

modulator

and

needed

BNC

They

or

from

may

PULSE

as

modulation

Front Handles Kit

(HP

Part

Number

of

front
for
Section

for a

Rack

(HP

flanges

the

II

for a

handles

mounting

II

of

detailed

for

installation.

Mount

Part

Number

and

8756A

in

inches)

of

this

detailed

horizontal

Operating

for installation.

Rack

Mount/Front

signal

and

power.
are
is

carried

displayed.

for

the

any

one

outputs

be

on

used

INPUT

source,

required

or
for a

capability.

5061-0090)

and

the

handles

this

Operating

description

Kit

5061-0078)

the

necessary

an

equipment

spac-

description

Han-

pro-

then

and

27.8
of

the

to
to

the

to

of

and

of

1-26.
tion
Diodes).
pressing
a
to a
used

The

is

identified

Local

[LOCAL]. [PRESET] is

hardware

predefined

to

save/recall

Instrument

by 4 LED's

operation

self-test

and

state. [SAVE]

State for

may

restores

up

to

states.

1-27.

1-28.
que
technique

AC

Modulation

The

8756A uses

in

conjunction

has

the

advantage

with

the

its

AC

detector

remote

(Light

be

used

the

and

[RECALL]

nine

detection

of

providing

opera-

Emitting

restored

to

perform

instrument

front

panel

techni-

inputs.

This

nearly

by

are

1-24.

Option
contains
one

Option

in

tions

II

of

this
detailed
for

installation.

1-36.

Service

1-37.
one
an

The

Operating

Operating

909

one

Option

908

preceding

Operating

description

Option

Manual

standard

and

Information

(HP

Part

907

Front

Rack

Mount

paragraphs).

and

Service

of

this

910,

Extra

instrument
Service

Number

5061-0084)

Handles

Kit (see descrip-

Refer to

Manual

kit

and

instructions

Operating

is

supplied

Manual

(including

supplement).

Kit

and

Section

for a

and

with

Each

1-3

General

Information

Model8756A

Option
and
obtain
Manuals
part
cover

1-38.

1-39.
work
The

country
manual

1-40.
SUPPLIED

1-41.
modulation
use
three detectors
required
the

910 provides

Service

Manual

one

additiona 1 Operating

after initial

number.

of

ACCESSORIES SUPPLIED

Figure

this

listed

manual.

1-1

Analyzer

power cable

of

destination. Refer to Section II

for

HP

EQUIPMENT

shipment,

on

shows the 8756A

HP-

IB

supplied

Part

Number

A swept microwave source with

capability,

of

an

to

8756A

external

make

Refer to

modulator)

and/

or

microwave

EQUIPMENT

for specific examples.

EQUIPMENT
1-42.

1-43.

may
detects
RF

11664AIB

Up

be

the

signal.
diode to achieve
quency
to
11664B

1-44.

tional Bridges

1-45.

18

G Hz.

The

range
Detector

85020AIB

Directional

8755C
bridge,

Scalar

one

AVAILABLE

Detectors

to three

used with

envelope

Each

Model

the
of

detector uses a

-50

of

the 11664A

The

extended

is

10

MHz

or

85020A/B

Bridges designed for

Network

zero-bias Schottky
measures the return loss
measurements
splitter
B).

4.3
The
GHz
The

(HP

The

85020A

GHz.

85020B

with a

85021NB

range, with

may

be

11667A)

has

a frequency

with a

nominal

has

a frequency range

nominal

provides

the

85021A (APC-7 test

and

additional

(and

suppliment).

order

the title page

Operating

and

by

and

Service

manual

Scalar

cable

and

power cable.

depends

upon

of

information.

REQUIRED BUT

NOT

27.8

(internal

or

and

through

from

one

directional bridges are

measurements

AVAILABLE

11664NB

8756A.

the 27.8

dBm

sensitivity.
Detector

frequency

to

26.5

85021

and

85021A/B/C

Analyzers.

of

the

test device.

made

by

detector

impedance

impedance

an

extended

kHz
biased

AlBIC

adding

range

The

modulated

is

range

GHz.

the

8756A

Within

diode

(HP

of

of

0.01

of

75

frequency

port

Detectors
11664NB

Schottky

The

10

MHz

of

Direc-

each

detector

Ratio

a power

11664N

of

0.0 I to

50

ohms.

to 2.4

ohms.

connec-

To

rear

Net-

the

this

kHz

the

to

with

fre-

the

are

and

tor)

and

the

85021 C (Precision

connector)

covering

85021 B (APC-3.5 test

0.01

to

26.5

GHz.

impedance

1-46.

1-47.
RF

signal
capability
kHz

rate.
signals from
kHz

from

Operation

information

regarding

1-48.

1-49.

to

18

device

With

Detector, two

of

insertion

to

the
manual
and

measurements

is 50 ohms.

11665B

The

11665B

source

of

modulating

The

11665B

15

the

portion

on

the

use

11

666A

Reflection

GHz

the

using

addition

may

the

simultaneous

and

Section III

for

further

Modulator

Modulator

MHz

8756A. Refer to the Section III

of

test setup

of

Reflectometer Bridge

measurements
be

11666A Reflectometer Bridge.

return

0.01
port

85021A/B/C

used

the

Modulator

to

this

the

11665B

made

of

an

loss

Operation

information

regarding

Type

to

18

GHz.

connector) covering

is

required

does

RF

not

output

modulates

18

GHz

with

manual

and

measurements

Modulator.

from 40

with

one

external

ratio

measurements

may

be

made. Refer

portion

on

the

11666A Reflectometer Bridge.

1-50.

1-51.

mended
transmission
This
output
source leveling
tions.
over a frequency
wideband

minimum

1-52.

1-53.
five low pass filters with
quencies: 11688A

11684A. 6.8
11686A

recommended
generated
cise

11667

The

A Power Splitter

11667A

when

Power

making

measurements

Splitter

low

with

loss

two-resistor type splitter provides excellent

SWR

at

the

The

0.25 dB
measurements

of

uncertainty.

11678A

The

11678A Low Pass

13.0

GHz.

by

broadband

auxiliary

or

ratio

tracking

range

Low

Pass

2.8

GHz:

GHz:

11685A, 9.56

The

to reduce

the

RF

source

measurements.

arm

when

measurement

between

of

de to
to

18

be

Filter Kit

Filter

the

following

11689A 4.4

use

of

low

undesirable

when

output
GHz

made

Kit

pass

making

N test

and

port

the

nominal

if

the

have

at

the

a 27.8

test

the

27.8

for

further

MHz

coupling

11664NB

of

this

test setup

use

of

the

is recom-

wideband

the

8756A

used

for

applica-

arms

allows

with a

contains

cutoff

fre-

GHz:

GHz:and

filters

harmonics

pre-

is

1-4

Model8756A

General

Information

1-54.

1-55.

11668A

The

11668A
recommended
active devices
Use

of

the

11668A

the

11665B

drive

feedthrough

possible

vents

1-56.

1-57.
Cable
Cable
tor

or
Scalar
operation
mance

1-58.

1-59.

use

of
After
specific

Modulator,

11679AIB

The

11679A 7.6 m (25 foot)

and

the
fit directly
11666A

Network

is

degradation.

11664C

The

11664C

standard

initial

diode
interchangeable
Frequency
upper
extending

1-60.

1-61.
the

8620C,
families
sources

the

8340A,

stop/marker

range

end

the

Sweep

The

8340A

may

for

the

the

by

and

frequencies

display: Save

sweeper
the
Enable
Sweep two
and
Sweep).

8340A

the
Drive
Drive
panel
ulator
Sweep

ULATION

simultaneously

sweeper

modulation:

different

display

The

Synthesized

RF

output

output.

is

connected

EXT

AM

Drive

Oscillator

INPUT.

High

Pass

High

Pass

when

which

making
have

High

Pass

reduces

from

8m

amplifier

11679B

saturation.

Extension Cables

61

m (200 foot)

between

Reflectometer

Analyzer.

thus

permitted

Detector

Detector

diode

detector

detector

the

operating

Oscillators

detectors with

with

the

of

the

11664C is

diode

calibration

used,

range

Synthesized

8350A/B

be

used

as swept

8756A.

8756A

With

is

able

and

and

recall

front-panel

with

simultaneously

Set

the

frequency

both

simultaneously

8620C Sweep

Sweep
signal with
With

to

input.

is

connected

front

the

the

With

the

8620C

Sweep

panel

The

Filter

Filter

accessory

measurements

gain

below

Filter,

V to I m V

placed

the

modulator

50

and

Extension
Extension

the

11664NB

Bridge

and

Remote

without

Adaptor

Adaptor

allows

the

with

the

11664C is

11664NB

detectors.

limited

detector

of

the

used,

8756A.

Sweep Oscillator,

Sweep

either

Oscillator

or

CW

the

8350B

to:Interrogate

annotate

the

states

the

8756A:

with

the

proper

sweep time:

or

power

(Alternate

Oscillator

Oscillator

8756A

Modulator

the

Modulator

modulate

Oscillator

the

to

8340A,

the

the

Synthesized

PULSE

8350A/B

on

MHz.

after

pre-

Detec-

8756A

detector

perfor-

the

8756A.

the

on

the

thus

signal

or

start/

CRT

of

the

Preset

8756A:

ranges

and

the

rear

Mod-

MOD-

Sweep

is

Oscillator

the

RF

source

1-62.

l-63.
duced
7470A

Plotters

Hard

by

or
segmented
and

annotation:

trace:

1-64.

1-65.
ber

8756A.

•

Plot

Service Accessories

A Service Accessory Kit

08756-60020) is

The

One

(HP

provided
Amplifier

•

One
extender
This
shooting
Two
test

points
troubleshooting
pulser,

•

One
1400-0734)

(HP

as

an

when

•

One

(HP

for

ease
blies.
extractors.

1-66.

1-67.
8756A
may
critical

RECOMMENDED

Equipment

is

be

substituted

specification

is

capable

at

copy

the

8756A

9872C

into:

of

27.8 kHz.

plots

when

digital

Graticule

Channel

all.

available

accessory

15-pin

Part

Number
for

kit

printed

use

in

Assemblies

special

board

+5V

(HP

is

the

test

are

purpose

Part
provided

A3

points

provided

devices (logic

current

16-pin I.C.
Part

aid

tracer).

Test

and

one

Number

for

probing

troubleshooting.

Log

Amplifier

Part

Number

in

removing

which

do

not

required

listed in

Table

if
listed

internally

are

automatically

used

with

plotter.

lines

Plots

only:

1 trace:

(HP

for

servicing

includes:

circuit

5060-0049).

hoard

This

troubleshooting

(A7,

AS,

A9).

printed

Number

through

and

for

Clip

20-pin

1400-0979)

circuit
08756-60015).

to

aid

A6

two digital

powering

(HP

Part

I.C.

are

Integrated

Assembly

03950-4001).

Log

Amplifier

have

board-mounted

TEST

1-3.

it meets

in

EQUIPMENT

to

maintain

Other

or

exceeds

the

table.

modulating

pro-

an

HP

may

be

Labeling

Channel

Part

Num-

the

extender

board

the

Log

board

in

trouble-

Assemblies.

ground

digital

probe,

logic

Number

Test

Clip

provided

Circuits

Extractor

Provided

Assem-

the

equipment

the

2

is

1-5

General

Information

Model8756A

1-68.
BUS.

1-69.
remote

HEWLETT-PACKARD INTERFACE

( HP-IB)

The

8756A

programming
Hewlett-Packard
provides a remote

trol

of

the

instrument
internal
operator.
tem

etc.)

receives
Several
ting data.

tests) available to the

Remote

controller

that

sends

data

output

commands

from

modes

Through

is

factory

equipped

interface

using

Interface Bus (HP-IB).

operator

with

the

same

(except the line switch

manual

control

(desktop

a subset

the

is

maintained

computer.

or

8756A

are

available

of

computer,

instructions

using

the HP-lB.
for output-

HP-GL

with a

the

This

con-

and

(local)

by a sys-

to

and

(Hewlett-

Packard
may

be

Graphics

plotted

on
Hewlett-Packard's
Standard
tion
entitled

Packard

488-1978. A

of

the

HP-

"Condensed

Interface

IB is

59401-90030).

1-70.

1-71.

face.
to
patable

8756

The

This

control

digital plotter

System Interface

8756A also

is a

port

and

extract

Language).

the

8756A CRT.

implementation

complete

general

provided
Description
Bus"

used

(HP

has

an

8756 System Inter-

exclusively by

information

and/or

sweep oscillator.

user

graphics

The

HP-IB

of

the

descrip-

in the

to

Part

the

Hewlett-

Number

manual

the

from a com-

is

IEEE

8756A

1-6

Model 8756A

Table

1-1.

Model8756A Specifications

SCALAR

SPECIFICATIONS

8756A

NETWORK

and

General Requirements

ANALYZER

General

Information

Dynamic

inputs

Dynamic

channel
Measurement

±5°C,

Range:

(A,

Accuracy:

B,

+

and

measurement

taken

at a

CW

frequency.

10

dBm

R).

Dynamic

using

over

±(0.1 dB +0.01 dB/dB) from
±(0.2

dBm

+0.02 dB/dB) from

dBm.

ERROR

0.5

10

to

+I

T

TT

dB

-50

dBm

accuracy

ll664NB

0 to

-50

+10

0

in all three

of

Detector.

dBm

to

-40

-40

101-

a single

at 25°C

dB.

to

-50

20

Modulator

outputs
HP
turned
the
the

301-

Drive:

on

rear

ll665B

on

and

"OFF"

ll665B

state,

fully

Frequency
Symmetry

L...

40

I

Pill

,..

3

panel, each

Modulator.

off

via the front

the

modulator

on

(minimum

27.8

kHz

50%

±2%.

50

separate

capable

Modulation

panel

insertion loss).

±100Hz.

I

REFERENCE
POWER

LEVEL=

+10

dBm

I

I

I I

POWER

modulator

of

driving

drive

may

or

HP-

drive signal

drive

one

be

lB.

turns

In

Sweep

vided
Input

Voltage:

by the Sweep

on

the

back

Voltage level:

Blanked
Unblanked
Marker

Active

Marker

Horizontal

Oscillator

panel

of

0 to +

10V.

Voltage

the

Levels

+5V

OV

-4V

-8V

Dynamic

GENERAL

sweep voltage pro-

through

HP

the

8756A

Sweep

typical

typical

typical
typical

Accuracy

REQUIREMENTS

Modulation

modulation.

Frequency
2:30 dB

45%

to

Marker

marker

and

signals
Oscillator
back

panel

Sweep

Time:

Requirements:

27.8 kHz.

on/off

55%

ratio.

symmetry.

Blanking

are

through

of

the

the

HP

Minimum

Square-wave

Requirements:

provided

Blanking

by

Pas Z Blank

8756A

sweep time 2:150 ms.

amplitude

the

input

and

Sweep

on

the

1-7

General

Information Model 8756A

Table

NOTE:

Values

Scale

Resolution:

per

division.

measurement

Reference

increments
or

-90.00

Resolution:

Vertical: 0.006 dB for display.

0.01

dB for

Horizontal:

Graticule:

division

I

in

this

table

0.1, 0.2. 0.5, I,

Independently

channel.

Offset:

from

Offset level

-70.00

to +20.00

to +90.00 dB (ratio).

"Display

401

8 vertical,

Cursor".

points.

10

horizontal

approximately

1-2.

are

not

2,

controlled

adjustable

0.9 em.

Supplemental Characteristics for 8756A

SUPPLEMENTAL

specifications

5, I 0.

or

for

in

0.01

dBm

(absolute)

DISPLAY

divisions.

HP-18

CHARACTERISTICS

but

are

typical

20

dB

each

Measurements:

nels
inputs.

dB

CHARACTERISTICS

Averaging:

128.

or

Normalization:

to 0.006
division
points.

CHARACTERISTICS

characteristics

Two

selectable

for: A

Averaging

256

may

be

Traces

dB

resolution,

or

offset

The

included

independent

B, R NR

Factors

selected

are

horizontal

for

user

information.

display

B/R

of

2,

4,

for

each

channel.

stored

and

independent

resolution

chan-

or

NB

8,

16,

32, 64,

normalized

of

scale/
is

401

Interface:

IEEE

Speed:

ASCI I
ASCII

Binary

User-accessible

cally

HP-

488-1978

format
format

format

750

two-inch

rate.

Writing

Transfer

either

reading)

taken

speed: typically

Formats:

ASCII

or

as

at

a single

measurement

Description:

used

exclusively by

The

IB

interface

standard.

trace: 800
point:

trace:

Graphics:

vectors with 60

Data

strings

(nominally 6 characters

16

hit

point

trace.

8756 System

operates

ms

10

ms

35

ms

Number

10

may

integers.

or

as

the

8756A to

typical.

typical.

typical.

of

p.,s

per

be

transferred

Readings

an

entire

Interface

according

vectors: typi-

Hz

refresh

vector.

per

may

be

401

point

SYSTEM

is a

port

control

and

to

as

INTERFACE

Programmable

Input

selection

Scale/

division

Reference
Normalization
Averaging
Open/short
Instrument
Save/recall
Trace

and

Autoscale

Plot

Modulation

Interrupts:

for

the

HP-

following

Front-Panel
Sweeper

Illegal

out

command

Instrument

extract
plotters

information

and

Functions:

(A

B, R NR

Level

calibration

preset

registers

calibration

memory

on/off

IB Service

Requests

conditions:

key

pressed

of

range

self-test

error

from

sweep oscillators.

B/R

NB)

are

compatable

generated

digital

Operating

Power:

Hz.

Temperature

100. 120.

Approximately

Range:

220.

or

240 +5%

100 volt-amps.

0°C to

1-R

+55°C.

-10%.

GENERAL

50 to 60

Dimensions:

188H X 425.5W X

!6.75 X 17.75 in).

Weight:

Net

15

Shipping.

kg (33 lb).

20 kg (44 lb).

451

mm

D (7.4 X

Model8756A

Table

1-3.

Recommended Test Equipment

(1

of

2)

General

Information

Instrument

Sweep Oscillator

RF

Plug-in

Detector

12

dB Step Attenuator

120

dB Step Attenuator

Critical

-

10V

0

SWEEP

Specifications

OUT

Ramp

Positive Z-Axis Blanking

IB

HP-

Programmable

Compatible with Sweep Oscillator

70

Internal
Frequency Range: Includes

dB Step Attenuator

50

MHz

Leveled Power Output:

~

13

No

Substitute

dBm at

50

MHz

1 dB Steps
Type N
Calibration

(f) Connectors

Data

at

50

MHz

to

0.01

Resolution

10

dB Steps
Type N
Calibration

(f) Connectors

Data

at 50

MHz

to

O.ot

Resolution

dB

dB

Recommended

HP

8350B

(HP

8350A)

HP

83525A

Opt002

HP

ll664A

(HP

11664B)

HP

355C
OptOOl
OptJ14

HP

355D
OptOOl

Opt

H88

Model

Use*

P,

A,

P,

A,

P,A,

P,A,

P,A,

T

T

T

T

T

Oscilloscope

Oscilloscope Probes

Universal

Counter

Digital Voltmeter

Power Meter

Power Sensor

Signature Multimeter

Logic Probe

Dual

Channel

Bandwidth:
10:1

Divider

Frequency Range:
Frequency Resolution:
Time Internal Resolution:

Accuracy:

Resolution:

Input

HP-

IB

Frequency Range: Includes
Sensitivity:

(HP

~100

MHz

(3

required)

~30

~0.03%

~5

m V

Impedance

(DC):

Programmable

~-55

dBm

ll708A

50

MHz

kHz

~1

Hz

~100

~10

50

Reference

Attenuator Included)

Compatible with

Power Meter

Signature Analyzer

~10

Clock Frequency:

MHz

TTL Compatible
Data

Rate:

~16

MHz

Compatible with Logic Pulser

M.O

MHz

ms

HP

1740A

10

10041A

HP

5316A

HP

3456A

(HP

3455A)

HP436A

HP

8484A

HP

5005NB

HP

545A

(HP

l0525T)

P,

P,

A,T

A,T

P,

T

A,

T

T

T

T

T

1-9

General

Information

Table

1-3.

Recommended Test Equipment(2 of2)

Mode18756A

Instrument

Logic Pulser

Current

Service Kit

Modulator

Controller

Printer/Plotter ROM

Advanced
ROM

Tracer

(Equipment

Programming

Critical

TIL

Compatible

TIL

Compatible

Compatible

No

Substitute

below required for

On/Off
Modulation

Personal

(No

Compatible

Compatible

Ratio:

Computer

Substitute)

Specifications

with Logic

Calibration

2::

Rate: 27.778

with Controller

with

Pulser

30

dB at

50

kHz

Controller

Constants

MHz

Recommended

HP

(HP

HP

HP

Adjustment

HP

HP85F

HP P /N

HP

Model

546A T

10526T)

547A T

Use*

PIN 087 56-60020 T

Procedure only)

ll665B

00085-15002

PIN 00085-15005

A,T

A,T

A,T

A,T

16K Memory Module

"CAL56A"

Adapter

Adapter

Band

Pass

Program

Filter

Tape

Compatible with Controller

No

Substitute

N(f) to N(F)

N(m) to N(m)

CF

=50

MHz, BW =

Rejection

SWR~1.2

>20
>20

dB at
dB at

20
100

10

MHz

MHz

MHz

HP

82903A

HP

PIN 08756-10001

HP

P/N

1250-1472

HP

P/N

1250-1475

Te1onic

P/N

50-10-2-EF

A,T

A,T

A,T

A,T

A,T

1-10

Model

The

8756A

Operation

section

of

this

manual

SECTION Ill
OPERATION

consists

of

the

following subsections:

Operation

1. OPERATING INFORMATION: A

ing

the

Model

2. OPERATING NOTES:

8756A with

3.

PROGRAMMING

Model

8756A with

8756A

other

Provide

instruments.

NOTES:

other

instruments

tutorial

Provide

complete

information

tutorial

and

controllers.

(Local

information

and

on

Remote) reference

Locally

on

operating

Remotely

operating

on

the

operat-

Model

the

3-i

8756A

SCALAR

NETWORK

ANALYZER

©

Copyright

1400

FOUNTAIN

HEWLETT-PACKARD

GROVE PARKWAY.

COMPANY

SANTA

ROSA,

CA

1983

95404

U.S.A.

Printed:

rfin-

APRIL

HEWLETT

~~PACKARD

1983

Model

8756A

Operating

Information

3-1.
3-2.

for

Network

8756A
the

SCALAR

INTRODUCTION

This

the

subsection
correct
Analyzer.

with

the

Operating

NETWORK

set-up

Model

Note

ANALYZER

#8756A/8350B/0000-99,
additional
Packard
Programming

3-3.
3-4.

OPERATING CHARACTERISTICS
The

cessor

{magnitude
{radio

is

programmable

Whether

it

can

control
through
instrument

directional

front

panel,

information

Interface

Notes,

Model

based

receiver.

only)

frequency)

or

not

the

8756

requires

bridge{s)

and

8756A

over

the

a

OPERATING INFORMATION

provides

For

8350B

BASIC

which

on

Bus

{HP-IB),

also

Scalar

reflection

and

microwave

the

Model

specific

SYSTEM

the

to

the

use

SECTION

III

complete

and

operation

specific

Sweep

NETWORK

AND

8350B

information

Oscillator,
MEASUREMENTS

SWEEP

follows

using

the

please

included

in

Network

It

is

capable

and

transmission

frequencies.

Hewlett-Packard

8756A

plotter

is

being
and/or

INTERFACE. A

connection

the

A,

B,

of

a

compatible

information

of

the

OSCILLATOR,
this
8756A

refer

this

Analyzer

of

controlled

measurement

of

detector{s)

or

R

detector

Model

on

8756A

operating

please

USING

manual.

over

to

For
the
the

section.

is

a

micropro-

making

scalar

measurements

The

Model

Interface

over

sweep

oscillator

with
and/or

inputs

RF/microwave

necessary

Scalar

refer

8756A

Hewlett-

8756A

8756A

Bus

{HP-IB).

HP-IB,

the

on

source.

the

to

at

RF

the

3-5.
with
measurements

ence.

27.8
device.
detector,

the
modulation
Drive

input

for

3-6.

internal
most
compatible

86230B,
plug-ins
the

The

8756A

its

detectors.

An

RF

kHz

square

When a

the

response.

BNC

outputs.

of

the

a

source

The

8350B

square

86200

86241A,

require

8756A.)

even
or

8756A

drive

RF
without

series
with

uses

microwave
wave,
signal

The

or

Sweep

wave
this

86242A, 86250A,

the

This

with

providing

filters,

8756A

from

any

They

microwave

internal

Oscillator
modulation.

plug-ins

internal

an

external

AC

detection

technique

temperature

signal

is

then

shapes,

provides

one

of

may

be
source

amplitude

with

modulation.

modulator

provides

variations

is

amplitude

the

stimulus

detected

the

three

used

or

provides

All

the

ll869A

86250B,

technique

very

modulated

to

by a compatible

digitizes,

necessary

rear

to

an

drive

external

panel

the

modulation

the

27.8

83500

series

Adapter

{The

86260A,

for

compatibility

in

conjunction

stable

and

RF
the
and

27.8
Modulator

external

kHz

Models

86260B,

interfer-

with

test

displays

kHz

modulator
capability.

with

plug-ins

are

86220A,

86260C

with

a

AM

its

and

3-1

Operating

Information

Model

8756A

3-7.

3-8.

OPERATING INSTRUCTIONS
The

*
*
*

*

*

3-9.

3-10.

8756A

all
for

verification

3-11.

OPERATOR'S

The

is

specifications

daily

ERROR

following
FRONT
SOFT KEYS:
REAR

HP-IB:

CRT

functioning

PANEL:

PANEL:

Fig.

GRAPHICS:

CHECKS

Operator's

instrument

after

MESSAGES

describe

Fig.

Fig.

to
repair

3-2

Fig.

3-4.

Fig.

Checks

correctly.

their

verification,

the

3-l.

and

3-3.

3-5.

(see

limits,

or

replacement

operation

Appendix

Fig.

It

3-6)

does

but

incoming

not

is

of

of

A.

verify
an

the

8756A:

that

thoroughly

appropriate

inspection,

digital

the

check

test

or

circuits.

3-12.

CRT

display

For

more

Service.

Error

information

Messages
when

conditions

are
on

shown

these

in

indicate

messages,

the

ACTIVE

a

problem

refer

ENTRY

with

to

Section

AREA

the

of

the

8756A.

VIII

3-2

Model

8756A

Operating

Information

FRONT

L-~--"

, G I

I I
I I

F:

I :

I I
I

.....

-----------

I E

L-.!1--~

D I C

PANEL

.. 1

OPERATING

FEATURES

1.

CRT

data

2.

CHANNEL

reference

3.

ENTRY

by

4.

INSTRUMENT

allows

5.

DETECTOR

detectors

6.

SOFT

7.

CRT

8.

LINE

Display

traces,

determines

provides

means

inputs

KEYS

DISPLAY

controls

of

and

line

of

the

STATE

INPUTS

and/or

provide

measurement

other

the

functions.

Data

Entry

Knob,

provides

to

alter

allow

bridges.

additional

measurement,

the

connection

annotation,

information.

for

the

STEP

keys,

information

the

state.

functions

SCALE,

of

CONTROLS.

AC

power

Figure 3-1. Front Panel Operating Features

to

the

8756A.

soft

key

display,

REF,

or

the

Keypad.

on

the

8756A

compatible

for

the

1 = ON, 0 =

(1

of

11)

labels,

scale,

and

soft

instrument

8756A.

OFF.

and

keys

and

3-3

Operating

Information

Model

7

8756A

1.

CRT

Display.

several

A

and

information

B

F: D

1--

t/

The

display

MODE
ment,
Active
division,
displayed.
in

Channel

intensity.

L-~--l

, G I

I I

I I

I I

I I

I I

-----------

I E JL.

sections,

LABELS.

the

Marker)

area

A;

is

L_!

for

the

described

The

CURSOR

amplitude,

and

the

The

Channel

shown

__

.. 1

8756A

ratio

(or

reference

Channel
with

~

IC

\

Model

2

below.

or

in

area

higher

is

divided

power

8350B/8340A

the

scale

level

1

LABEL

B.
display

into

measure-

per

value

is

shown

The

Active

are

c

D

MEASurement

~

SCALE

per

SOFT

soft
particular
pressing

soft

DATA
displayed

CHANNEL

CHl~

10.0

A
dB/

I

division

KEY
key

key

DISPLAY AREA.

CURSOR

-28.50,dB
REF

REFerence

LABELS.
selections

menu

the

soft

label.

depending

functions

or

/

0.~0

The

are

or

function

key

The

on

selected.

MARKER

dB

LEVEL

menu

annotated.

to

the

data

the

value

value

of

is

right

trace(s)

soft

available

chosen

of

key

A

by
the

are

or

Figure 3-1. Front Panel Operating Features

3-4

(2

of

11)

Model

8756A

Operating

Information

E

F

G

FREQUENCY
Active
Stop

Marker

Frequencies,

frequencies

are

annotated

Oscillator

IB

is

connected
INTERFACE
8340A
19

must

decimal.

Reference
2

are

denoted
graticule
major

ACTIVE
command

graticule

ENTRY

function
Exceptions
PWR.

LABELS.

(CURSOR

(if

when

or

8340A

on

the

have

Line

Positions

on

grid.

AREA.

are

PRESET,

The

and

that

the

to

the

Rear

their

the
The

lines

The

selected

Start,
takes
the

Alternate

function

Model

Synthesized

8756

Panel.
HP-IB

for

left

margin

Reference

only.

last

is

MEAS

RATIO,

CURSOR

precedent)

is

selected)

8350B

Sweeper

SYSTEM

The

8350B

address

channel

of

Line

entry
denoted

or

,

Sweep

Sweep

set

1

the
lies

or

HP-IB

here.

and

MEAS

HP­or

to

and

on

Figure

3-1.

Front Panel Operating Features

(3

of

11)

3-5

Operating

2.

Information

CHANNEL.
scale,
channel

function

and

has

selection
corresponding
CHANNEL

key.
that
higher

that

key

area,

Selection

channel

intensity

channel.

function

This

area

reference

identical

for
lamp
and

is

of

a

the

Active
MODE

Labels

LABELS ON/OFF

selects

line

column

each

(LED),

selected
function

LABEL.
are

the

functions

of

key

located

Channel

also

has

measurement,

of
independent
is

denoted

in

the

by

repeated

(except

and

is

Trace

data

displayed,
selected

the

center

pressing

CHAN

indicated

is

unless

labels

display,

8756A.

keys.

by

the

of

OFF)

designates

displayed

OFF.

by
the

Model

Each
The

the

of

a

soft

8756A

that

for

~

~

e

A/R

e

8/R

e

A/8

e A

• 8

e R

Selects
RATIOs
selected,

measured

ratio

measured

values
tion

equals

displayed

(decibels)

B/R

and

The

shift

labels

The

channel

any

other

channel.

Selects

or

R

in

MEASurement

A/R,

B/R,

the

value

compared

value

are

in

the

units

.

Similar

A/B.

function

and

data

is

function

MEASurement
dBm.

of

or

A/B.

displayed

of

A

in

to

one

of

R

in

dBm, a

linear
for

the

of

for

the

turned

referring

of

detector

When

data

dBm

(decibel

milliwatt)

dBm.

logarithmic

division

measurement

operation

this

key

channel

back

on

detector

signal

A/R

is

the

Since

A/R.

occurs

shuts

selected.

by

to

that

power

is

power

minus

the

subtrac-

The

are

for

off

selecting

A,

the

dB

B,

Figure 3-1. Front Panel Operating Features

3-6

(4

of

11)

Model

8756A

0 I

SPLAY

(DISPLAY)

--+HEM

e MEAS

e

HEM

e

H-HEM

Selects
power,
ment

minus

horizontal

is

401

DISPLAY

the

stored
MEMory
display

points.

of

a

MEASured

MEMory,

(normalized)

resolution

Operating

ratio

or

the

data.

of

Information

or

MEASure-

The

the

8756A

AUTO

EJ

MKR--+

REF

•

dB/DIV

•

LEVEL

• PDSN

The

shift
current
ternal
stored
for

MEAS
regardless
sion,

or

Allows

0.

2,

or

division,
The

shift

AUTO

SCALE

selected.

LEVEL

so

seen

value

that

on

Provides
LEVEL

or

reference

of

the

using

the

function

MEASurement
memory.
at

the

PWR

of

MEMory

highest

and

the

REFerence

selection

0.1

dB

vertical

using

the

function

of

the

AUTO

the
the

SCALE

and

SCALE
entire
display.

selection

REFerence

line.

major

horizontal

KNOB

or

of

this

DISPLAY

data

key

data

is

resolution

.006

dB

for

MEAS

DISPLAY, SCALE

of

LEVEL

20,

value

10,

5,

resolution

ENTRY

of

this

area.

key

MEASurement

adjusts

per

division

trace

of
POSN

REF

either

POSN

of

data

(position)

may

graticule

STEP

keys.

places

into

always

per

set.

2,

performs
and
the

can

the

REFerence

be

set

the
in-

(.003

dB

RATIO)

divi-

1,

0.5,

per

an
DISPLAY
REFerence

values

be

of

the

to

any

lines

The

when
The
ENTRY
measurement

the
are
line

reference

dB

or

dBm

compared,

about
the

SCALE

REF

LEVEL

area.

line
value
and

which

value

Varying

of

per

any

LEVEL

to

serves

the

division

is

point

display

this

trace.

The

shift
REFerence
CURSOR.

tion

When

8340A

is

the

Synthesized
decimal)
INTERFACE
and

the
value
8340A

Figure 3-1. Front Panel Operating Features

will
Active

function

LEVEL
This
desired

8350B

is

connected

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allows

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display

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sets

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higher

position.

or

(address

8756

of

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the

8350B

value.

11)

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the

easy

the

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the

19

SYSTEM

8756A,

LEVEL

or

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Operating

3.

Information

ENTRY.
provided
Keypad.

Data

by

Entry

means

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0

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terminate

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entered.

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to

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keypad

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delete

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INSTRUMENT

entries

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OFFSET

of

the

AVERAGE

STATE

for

SCALE,

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last

Figure 3-1. Front Panel Operating Features

3-8

(6

of

11)

Model

8756A

Operating

Information

STEP

REF

@]~

Keypad
and

decimal
functions
terminator
except

Increments

value

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shift

provides

step

size

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enter

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to

function

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when

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value

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selection

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decrements
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the

REFERENCE

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CURSOR

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keys
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with

. A

key

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Figure 3-1. Front Panel Operating Features (7

Allows
LEVEL,

(under

easy
REF

CAL

entry
POSN,
menu)

of

CURSOR, SCALE,

AVG

FACTOR,

functions.

of

11)

or

DET

REF

OFFSET

3-9

Operating

Information

Model

8756A

4.

INSTRUMENT
instrument

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key

9)

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(blue)

the

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state.

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HP-IB
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sweep

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Figure 3-1. Front Panel Operating Features

to

9

previously

setting

this

9).

or

the

19

SAVE

and

of

Alternate

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on

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of

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front

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8756A.

sweep
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3-10

Model

8756A

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Information

1.

Both
a.
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Channels

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8756A

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ms.

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Figure 3-1. Front Panel Operating Features

(9

of

11)

3-11

Operating

The
"IP"

REF

Information

following

command

are

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in

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3-12

Figure 3-1. Front Panel Operating Features (10

of

11)

Model

5.

8756A

DETECTOR

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8756A

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CRT

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Figure 3-1. Front Panel Operating Features

Allows

brightness.

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focus

of

for

for

the

adjustment

screwdriver

CRT

display.

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adjustment

(11

of

11)

CRT

display

of

the

3-13

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Information

Model

8756A

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of

menu

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of

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immediate

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Figure 3-2. Soft Key Operating Features

(2

of

10)

3-15

Operating

Information

Model

8756A

CURSOR/\

{b),

of

is

and

the

CURSOR

marked

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amplitude
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point

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both

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Figure 3-2. Soft Key Operating Features

the

Channel

functions

CURSOR

2

trace.

may

{+

be

symbol)

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of

to

10)

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either

minimum

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3-16

Model

8756A

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Information

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appears,

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10)

3-17

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3-18

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a

directional

turned

on

the

last

set.)

circuit
depressed.
STORE

WHEN

this

to

the

turned

on

the

the

MAIN

Open/Short

an

into

as

•••

THEN

or

MEAS

CHANl

displays
as

shown

short

circuit
bridge/coupler.

ON/OFF

trace.

trace

data

This

READY,

point,

test

an

port.

ON/OFF

trace.

MENU,

Calibration,

open

&

MEMory

shown

CHl

or

PWR

or

CHAN2

for

making

the

with

(The

is

action

as

open

As

with

the

Through

short

for

calibration

in

the

CH2.

on

Channel

is

the

next

in

the

should

the

AVERAGE

Averaging

displayed

displays

shown

circuit

with

the

AVERAGE

CAL

Menu

useful

a

series

circuit

ACTIVE

At

this

desired.

pressed,

reflection

prompt

ACTIVE

be

connected

If

Factor

as

in

the

(a

the

short

appears,

for

of

average,

of

ENTRY

point,

depending

CONNECT

ENTRY

desired,

ON/OFF

is

desired,

the

next

ACTIVE

shielded

circuit,

ON/OFF

making

the

AREA

the

AREA

to

soft

prompt

ENTRY

open

soft

as

of

the
key

key

When
OPEN

the
is

action

in

(e).

now

stored

DISPLAY

the

calibration.

DET

A OFFSET

the

A

detector

DET

B OFFSET

the

B

detector

DET

R OFFSET

the

R

detector

The

value

OFFSET

reading
with
is

an

a
also
attenuator

open

depressed.

taken:

This

in

M-MEM

of

is

useful

on

the

power

useful

circuit

The

OPEN/SHORT

acknowledges

MEMory

for

for

that

displays

input,

displays

input.

displays

input.

OFFSET

8756A

meter;

for

is

Figure

may

for

entering

with

this

entering

connected

3-2.

trace

ACTIVE

CAL

the

Channel

the

current

as

shown

the

current

the

current

be

a

provides

S(?ft

data

ENTRY

SAVED

that

Channel

shows

in

changed

the

specific

the

in

front

Key

Opaating

is

displayed

IN

the

open/short

value

(f).

value

value

using

difference
better

value

of

AREA

CHl

selected.
the

trace

of

of

of

the

detector

accuracy.

of

attenuation

a

detector

Features

now

(or

offset

offset

offset

(6

of

as

desired,

indicates

2)

MEM,

calibration

Selection

data

entered

entered

entered

ENTRY
between

and

the

(padding).

10)

relative

area.

the

reading

The

used

STORE

the

as

shown

is

of

for

for

for

The

OFFSET

when

to

3-19

Operating

Information

CT

SEL

'

•

I \

1/

../

PLO

I

Model

8756A

PLOT Menu

D

TA

'
'

1\

\

PLO

TI

G

'

I

1/

I \

../

'

RACE 1 REf"

'

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PLO C MPL

v

TE

'

RACE

1

I

rr

I

'

\

\

(!t":J

~~.

:s...

NO

'

v

When PLOT

as

shown

ACTIVE

the
8756
set
and

respectively)
changed
Refer
changing

ENTRY

HP-IB

SYSTEM

to

00101

P2

positions

by

to

(a)

REf"

+

LO

TER

AV

IL

I

I \

(d)

is

selected

in

(a).

AREA.

Plotter

INTERFACE.

binary

(bottom

will

the

user

the

Plotter

Pl

and

P2.

'

'

\

The

This

(either

or

be

at

Operating

Q,r"J

PL~~

liACE

~

on

the

prompt

menu

the

The

05

decimal

left

the

Plotter's

any

(b)

T~'

B

:B

R[f"

..

PLO TE
NOT

RE DY

I

I \

1/

../

{e)

MAIN

MENU,

SELECT

allows
7470A

Plotter

for

limit

time

after

Manual

the

PLOT

for

or

9872C)

address

proper

and

upper

default

powering
for

~e~

'

RACE

1

'

'\

PLOT
DATA
plots

switches

values,

the

menu

is

shown

to

be

connected

operation.

right

on

the

procedure

(c)

appears,

in

made
must

limit,
but

Plotter.

the

onto

to

be

The

may

on

the

Pl

be

Figure 3-2. Soft Key Operating Features

3-20

(7

of

10)

Model

8756A

Operating

Information

PLOT
markers
over
however,

through

TRACE 1 draws

1.

CURSOR
as

TRACE 2 draws

2.

CURSOR
as

LABELS
and

GRID

ALL
the

<>

<>

the

draws

draws

on

the

HP-IB

the

commands

is

denoted

is

denoted

draws

FREQUENCY

the

the
HP-IB
of

user

the

the

the

grid

grid,

the

may

(see

trace

as

trace

as

~

MODE

LABELS.

(or

labels,

plotter.

8756A
access

HP-IB

data,

~

,

the

data,

,

the

LABELS,

graticule)

trace

Graphics

will
Operating

not

the

plotter

CURSOR,

CURSOR/\

CURSOR,

CURSOR/\

reference

be

Features,

and

and

lines.

data,

written

drawn

by

markers

AS

markers

AS

line

CURSOR,

on

means

/\,

/\,

position

Fig.

and

and

to
this

of

for

for

and

the

plot;

passing

3-4).

Channel

the

Channel

the

labels,

CRT

markers

markers

If

the

HP-IB
decimal,
INTERFACE,
plotting,
when

is

If

at
as

If

message,

INTERFACE,

When

HP-IB

annotation
also
is

on,

and

any

finished,

the

HP-IB

all)
shown

the

pressed.

the

is

appear

the

will

to

HP-IB

Active

and

the

and

of

the

the

in

(d).

etc.),

the

8350B
also

of

on

be

shown

Plotter

its

HP-IB

CRT

the

ACTIVE

PLOT Menu

the

CRT

Plotter

8756

Plotter

but

CRT

Sweep

connected

Start,

the

If

the

Marker

on

has

is

Display

display

is

SYSTEM

is

is

properly

display

Oscillator
Stop,

bottom

CURSOR

will

the

its

address

properly

is

frozen,

ENTRY

soft

improperly

not

to

of

trace

AREA

keys

appears

INTERFACE,

ready

appears

the

8756

and

CURSOR

the

is

off

appear

data

switches

connected

the
appears
are

as

connected

the

(paper

connected

as

shown

or

8340A

SYSTEM

(if

plots

and

a

in

the

as

plotter

as
pressed.
shown

CRT

not

to

in

Synthesized

INTERFACE,

ON)

when

a <)

PLOT

marker

frequency

set

to

to

the

begins

shown

When

in

(c)

(or

not

display

loaded,
the

8756

(e)

•

frequencies

ALL

or

markers

annotation

05

8756

•

or

SYSTEM

in

(b)

the

connected

appears

error

SYSTEM

Sweeper

will

LABELS

are

plot

Figure

3-2.

Soft Key Operating Features

(8

of

10)

3-21

Operating

Information

[!.p"]

CURSO,

AVERAGE

CA~

PLOT

LABEL~

ON/OF"

I

1/

MORE

./

LABELS ON/OFF

I

\

I

1\

\

(a)

1\

\

AVERAGE

CA~

PLOT

LABEL_d

ON/OFFf

MORE

Model

8756A

When LABELS ON/OFF

is

selected

on

the

MAIN

MENU,

the

MODE

LABELS,

and

Reference

Line

Position

labels

are

alternately

turned

OFF,

as

shown

in

(a),

and

ON.

When

the

8350B

Sweep

Oscillator

or

the

8340A

Synthesized

Sweeper

HP-IB

is

connected

to

the

8756

SYSTEM

INTERFACE,

the

FREQUENCY

LABELS

will

be

alternately

turned

OFF

and

ON

also.

Figure 3-2. Soft Key Operating Features

(9

of

10)

3-22

Model

8756A

Operating

Information

CURSO,

AVtRAGE

CA~

PLOT

LABEL~

ON/OF

MORE

RErt

STRT

v

+2.

MORE

1/

I

1/

80B0GHz

I

{a)

Menu

STOP

\

1\

+6

. 0000GH:z

\

\

Mod

ON/OFFj

SERVICE

When
as

MOD

MORE

shown

ON/OFF

MODULATOR

and

OFF.

necessary

insertion

SERVICE

provides

routines

is

selected

in

(a)

turns
DRIVES,
When

to

hold

loss

(see

Section

on

the

MAIN

MENU,

the

•
the

OFF,

an

27.8

located

the

external

kHz

square

on

the

MODULATOR

modulator

wave

rear

DRIVES

output

panel

provide

in

mode.

for

enabling

VIII

Figure 3-2. Soft Key Operating Features (10

the

Service)

built-in

•

MORE

menu

from

of

the

8756A,

the

the

minimum

serviceability

of

10)

appears,

the

ON

power

3-23

Operating

Information

Model

8756A

3-24

REAR

PANEL

OPERATING

FEATURES

1.

8756

SYSTEM

INTERFACE

W«l'l-'/

'>!()

r)l<U<A'<%

%>'<,><AMi'~>;"'""''"

JH";VJ~

11!HJJ

0>!>'r~'~,~C

J0

;JlJ;O.U•feJ:>

~tJil(i(;"t

f"tj'CS.()~t~V

Input/Output

connector

provides

control

of

the

HP

8350B

Sweep

Oscillator

or

the

HP

8340A

Synthesized

Sweeper

and

the

HP-IB

Plotters,

Model

7470A

or

9872C,

through

their

respective

HP-IB

connectors.

This

control

is

accomplished

without

the

use

of

an

external

HP-IB

controller.

The

8350B

or

the

8340A

address

must

be

set

to

19

decimal;

the

7470A

or

9872C

address

must

be

set

to

05

decimal.

The

8756

SYSTEM

INTERFACE

control

of

the

8350B

or

the

8340A

provides

frequency

annotation

shown

in

the

FREQUENCY

LABELS

of

the

CRT

display,

SAVE, RECALL,

and

PRESET

(pressed

on

either

instrument)

of

both

instruments,

and

Alternate

Sweep

capability.

The

8756

SYSTEM

INTERFACE

control

of

the

7470A

or

the

9872C

provides

for

hard

copy

plots,

using

the

PLOT Menu

of

the

Soft

Keys,

and

PRESET

to

default

values

for

the

plotter.

2.

HP

INTERFACE

BUS

Input/Output

connector

allows

interfacing

to

HP-IB

controllers.

The

HP-IB

address

is

set

at

the

factory

to

16

decimal,

which

may

be

changed

using

the

ADDRESS

function

(SHIFT

LOCAL)

•

Other

instruments

may

be

connected

to

the

HP-IB,

but

must

be

set

to

a

different

address

value.

Figure

3-3.

Rear

Panel Operating Features

(1

of

2)

Model

3.

4.

5.

8756A

SWEEP
Input
signal

POS

Z

Input

and

accepts

signals.

volts

markers,

STOP

SWEEP

Output

the

sweep

Synthesized

the

8756

IN

0-lOV

BNC

connector

from

BLANK
BNC

connector
The

for

blanking,

and

BNC

on

SYSTEM

the

sweep

negative

signal

-8

volts

connector

the

8350B

Sweeper,

INTERFACE.

accepts

oscillator.

accepts

Intensity
levels

0

volts
for

provides

Sweep

used

NOTE

the

retrace
sensed

for

the

Oscillator

only

0

Marker

display,

Active

the

when

to

+10

and

(Z-axis

on

this

Marker.

interface

these

Operating

volt

sweep

bandswitch

modulation)

input

-4

volts

signal

or

the

8340A

are

controlled

Information

ramp

blanking

are

+5

for

to

stop

by

Connection

from
needed

8350B
Sweeper
connection

6.

MODULATOR

Output
signals
external

Modulation

Synthesized

connected

7.

DISPLAY

Output

another

example,

bandwidth

of

source
the

ohms.

1

circuits

screen
impedances

display

the

same

volt

a

sweeper

for

Sweep

is

DRIVES

connectors,

(nominally+/-

HP

of

to

OUTPUTS

connectors

peripheral

Model

of

X

and

impedance

voltage

A 0

volt

output

are

displays

less

should

of

the

or

proper

Oscillator
connected
of

STOP

11665B

a

sweep

Sweeper,

the

PULSE

1310B).

5

MHz

Y

axis

of

range,

Z

corresponds

designed

with
than

not

SWEEP

IN
source
operation

or

to

the

SWEEP

each

providing

6

modulators

oscillator.

this

MODULATION

providing

such

as
The

or

greater.
outputs
about

but

axis

output

for

10

K

600

exceed

0-lOV

are

the

of

the

8340A

8756

is

mandatory.

volts,

or

modulator

X,

a

large

added

range

340

ohms.

a

source
corresponds

to

blanking

use

with

ohms

ohms.

6

feet

and

the

minimum

the

8756A.

Synthesized

SYSTEM

27.8

kHz

unloaded),

the

external

When

drive

INPUT.

Y,

and

z

screen

peripheral

The

open

from

0

The

impedance

mode.

Hewlett-Packard

impedances,

Cable

(1.83

lengths

meters).

POS

Z

BLANK

requirements

When

the

INTERFACE,

square
for

driving

Amplitude

using

the

should

outputs

for

display

should
circuit
to

1

volt

Z

axis

output

of

to

display

These

and

cannot

to

wave

8340A

be

driving

(for

have

amplitude

from

has

about

mode,

output

large

drive

this

a

a

250

8.

POWER
Input

selection
correctly
Refer

LINE

MODULE

connector

of
inserting

to

Fig.

instructions.

Figure

100,

2-1

accepts

120,
in

3-3.

Rear Panel Operating Features

220,

the

printed

Section

line

voltage.

or

II

240

volts

circuit

Installation

Line

is

selector

(2

of

2)

voltage
chosen

for

by

board.

3-25

Operating

Information

Model

8756A

Remote

operation

accomplished
which
dated

to

the

is

the

1978

Tutorial

and

Literature
Hewlett-Packard

Remote
with

the

panel

controller
HP-IB

is

The

HP

for

selecting

special
channel

specified
HP

8756A

Sweep

7470A

Oscillator

or

control

described

8756A

HP-IB
measurement

by

can

9872C

HP-IB

of

the

using

Hewlett-Packard

IEC

Description

No.

operation

HP INTERFACE

of

the

accepts

front

only

the

pass

plotter

the

625-1.

5959-0156,

Interface

of

HP

to

the

of

the

in

the

PROGRAMMING

specific

panel

functions.

trace

user,

through

or

the

OPERATING FEATURES

HP

8756A

Hewlett-Packard

implementation

For

more

of

the

and

Bus,

NOTE

the

HP

BUS

(HP-IB)

8756A.

8756

SYSTEM INTERFACE

instruments

8756

SYSTEM INTERFACE

programming

key

functions,

or

memory

as

well

as

HP-IB

HP

8340A

connected

Part

8756A

It

Scalar

information

Hewlett-Packard

Condensed

No.

59401-90030.

applies

connector

Do

not

connect

connected

COMMANDS

soft

outputs

trace

other

TALK

commands

Synthesized
to

the

8756

Network

Inter

of

face

IEEE

on

Description

to

to

section

commands

key

data

in

from a designated

one

functions.

to

either

Sweeper
SYSTEM

Analyzer
Bus,

standard

the

HP-IB,

Interface

operations

on

the

an

HP-IB

connector

this

port

below.

(LISTEN

functions,

of

two

the

and

INTERFACE.

of

rear

formats

Also,

HP

is

HP-IB,

488

refer

Bus,

the

i

mode)

and

the

8350B

the

HP

All

of

these

Table
Table
Table

For
3-l;
same

The

3-l.
3-2.
3-3.

more

on

the

function

8756A

characters.

two

or

more

must

feed

be

"[cr][lf]",
"db[cr][lf]".
legibility

Commands
refer

codes

Function
Output
Cross

information

soft

whether

commands

Variable

digits)

terminated

of

programs.

and

to

the

are

Mode

Reference

key

may

and

with

a

"[lf]",

The

characters

standard

Figure 3-4.

described

Select

Commands

on

the

functions,

under

INPUT

be

length

all

a

semicolon

latter

HP-IB

in

Commands.

and

of

Tables

front

remote

see

panel

Figure

or

COMMAND

sent

as

upper

commands

commands

beginning

";",

a

"DB;",

four

a
are

NOTE

enclosed

ASCII

Character

Operating Features ( 1

these

Formats.

1

and

key

3-2.

local.

SYNTAX

and/or

(two

characters

a

"db;",

useful

in

quotation

tables.

2.

functions,

These

lower

with

carriage

a

"DB[cr][lf]",

Set.

(~l7J

the

return,

for

marks

see

Figure

per

form

case

followed

letter

improving

• •

the

ASCII

by

"0"

line
or

a

3-26

Model

8756A

Operating

Information

Throughout
some

commands.

m 0 =

d

n

q

Tables

Format/Values

Function

1 =

Function

Variable
point,
ators

"DB[cr]

not

correspond

will

be

Decimal
Values

explained

FORMATS

3-1

These

length

if

desired.

"~",

[lf]",

rounded

integers

unique

under

and
are:

Off.

On.

or

to

and

to

HP-IB

OF

NUMERICAL

3-3,

numerical

parameter,

These

"[cr][lf]",

"db[cr]

the

function's

assigned

1

through

the

particular

COMMAND

ONLY

INPUTS

inputs

including

parameters

"[lf]",

[lf]".

the

When

resolution

closest

9.
function

DESCRIPTION

FUNCTIONS

are

appended

sign

require

the

and

decimal

the

termin-

"DB~", "db~",

value

allowable

or

of

range,

and

or

NOTES.

to

d

does

value.

d

HP-IB

The

entire

only

Blank

CRT

condition.
The

Clear

The

Format
Table
the
Data
the

Output
word,

used

MEAS
dB

MEAS
dBm

The

3-2.

format

Binary,

most

Data,

and

to

RATIO

value=

PWR

value

Pass

significant

scale

INTERFACE.

'YTES.

functions

CRT

Display

display

Status

Data

The

of

commands

Format

ASCII

"FDl"
or

Output

converted

the

or

M-MEM:

(decimal

=

(decimal

Through

Request

are

Features

or

restoring

command

are

Data

signed

command,

byte

Value

to a decimal

data:

value)*

value)

command

Mask

is

shown

clears

useful

ASCII,

digits,

will

sent

first,

commands.

180

*

is

explained

in

Table

commands

the

display

(sets

"FDO"

as

output

for

shown

to

outputting

command,

data

when

If

value,

I

the

32767

90 I 32767

discussed

under

3-1.

provide

to

zero)

in

the

in

the

using
these
following

its

both

will

are

for

normal,

data,

table.

form

the

read

blanking

Status

as

output

The

of

two

Output

as a 16

formulas

power

Bytes.

shown

data

Format

bytes,

Cursor,

may

90

70

under

the

8756

SYSTEM

SERVICE REQUEST & STATUS

the

on

in
in

bit

be

Figure 3-4. HP-IB Operating Features

(2

oj7)

3-27

Operating

Information

Model

8756A

The

Set

Cursor

Position

command

is

useful

for

setting

the

CURSOR

on

a

data

trace

at

a

specific

frequency.

Given

the

Start

and

Stop

frequencies,

the

CURSOR

may

be

set

to a Frequency

using

the

formula:

Set

Cursor

Position

value=

(Frequency-

Start)*400/(Stop-

Start)

Non

Swept

Mode

stops

the

update

of

data

traces

with

the 0 to

10

volt

sweep

ramp,

and

is

used

to

hold

data

for

taking

the

measurement

and

outputting

the

data.

Swept

Mode

causes

the

data

traces

to

update

with

the

sweep

ramp,

and

should

be

received

by

the

8756A

to

restore

normal

swept

frequency

displays.

Take

Sweep

is

used

to

take a specific

number

of

sweeps,

then

hold

data

on

the

display.

This

is

useful

for

controlling

the

87

56A

in

normalization

(M-MEM)

and

averaging

applications.

Write

Key

is

used

to

put

user

defined

labels

on

the

Soft

Keys.

The

"WK"

command

is

followed

by

the

soft

key

number

in

ASCII,

range

1

through

6.

Then,

this

is

followed

by

"[ASCII

label]"

for

a

single

line

label

or

"[ASCII

label]

[term],

[ASCII

label]

[term]"

for

a two

line

label.

The ASCII

label

must

be

seven

characters

or

less

and

terminated

as

shown

by

[term]

=

[cr]

[lf]

or

semicolon

; •

Write

Memory

is

used

to

write

to a particular

channel

memory

with

401

points

of

data.

After

receiving

the

"WM"

command,

the

8756A

expects

401

values

in

the

format

("FDl"

or

"FDO")

previously

selected.

These

values,

in

turn,

are

written

to

the

Channel

Memory

previously

designated

("Cl"

or

"C2").

HP-IB

OUTPUT

COMMANDS

Data

is

output

from

the

8756A

by

first

sending

one

of

the

"0"

commands

listed

in

Table

3-2.

Output

Cursor,

Output

Data,

and

Output

Value

are

used

to

obtain

measurement

data,

in

either

ASCII

format

("FDO"}

or

Binary

format

("FDl"},

where

the

most

significant

byte

is

sent

first.

Refer

to

Table

3-2

for

Output

Identity

and

Output

Keycode.

The

Output

Status

command

is

explained

under

SERVICE

REQUEST & STATUS

BYTES.

HP-IB

ERROR

MESSAGES

Any

alphanumeric

sequence

which

is

not

a

recognized

8756A command

will

be

noted

on

the

CRT

in

the

ACTIVE

ENTRY

Area

as

"UNKNOWN

CMD-"

followed

by

the

last

one

or

two

characters

received

by

the

8756A

over

HP-IB.

The 8756A

will

not

lock

out

further

HP-IB

traffic,

and

will

execute

any

subsequent

valid

command.

Further,

a

syntax

error

service

request

(SRQ}

will

be

sent

if

that

SRQ

bit

has

been

enabled

in

the

Request

Mask

(see

SERVICE

REQUEST & STATUS

BYTES

below}.

If

there

are

many

errors

in

the

alphanumeric

sequence,

only

the

last

error

is

displayed

in

the

ACTIVE

ENTRY

AREA.

Figure

3-4.

HP-/B Operating Features

(3

of

7)

3-28

Model

8756A

Operating

Information

The

8756A

488-1978:

SHl:
AHl:
T6:

Source
Acceptor

Basic
listen
L4:
SRl:
RLl:

Basic
Service

Remote;
PPO: No
DCl:

Device
DTO: No
CO: No

El:

The

16.

Open

HP-IB

The
depressing
observing
changed,
ENTRY

area,

(Remember
use
SYSTEM

of

remain

INTERFACE

unchanged

has

talker;
listener;

Parallel

Device
Controller

collector

address

current

the

the

if

desired,
range

that

address

CAPABILITY IDENTIFICATION

the

following

handshake

handshake

Request
Local

Poll

Clear

Trigger

for

address

ADDRESS

ACTIVE

01

most

21

HP-IB

decimal

below.)

even

Serial

Unaddressed

(Take

bus

drivers

DEFAULT

the

HP

(SHIFT

ENTRY

by

keying

to

29

decimal,
controllers

This

if

power

capability

Poll;

or

Pass

8756A

value

LOCAL)

AREA

in

the

should

address

is

code,

Unaddress

to

listen

Control)

ADDRESS

is

set

may

be

key

on

the

digits,

followed

use

be

avoided.

will

turned

CODE

in

to

if

at

the
easily

on

CRT

using

by

address

become

off,

conformance

talk

if

addressed

addressed

factory

determined

the

front

display.

the

Keypad

pressing

21

decimal;

Further,

the

or

"IP"

is

with

to

to

decimal

panel

It

the

ENT

see

address

received.

talk

may

in

key.

thus,

8756

IEEE

to

by

and

be

the

and

The

8756
INTERFACE.
for

the
control
plotter
Oscillator

8756A's

The

transfer
Through
passing
passing

Subsequent

through

be

sent

The

~omplementing

Rear

This

Hewlett-Packard

an

HP-IB

(HP

7470A

or

HP-IB

of
"PTd"
through

through

addressing

commands

at

any

address

Panel

to

command

of

the

has

connector
Sweep

or

9872C)

Plotter

the

8756

commands

to

the

to

the

of

to

the

8756

Oscillator
HP-IB

to

HP-IB

instrument

SYSTEM

another

is

Interface

through

SYSTEM

and

data

the

HP-IB

the

8756

INTERFACE

control

physically

Bus,

(HP

their

commands

INTERFACE.

is

performed

HP

8756A,

Sweep

Plotter.

SYSTEM

selected.

Oscillator

time.

the

least

Figure 3-4. HP-JB Operating Features

8756

significant

SYSTEM

port

called

the

but

is

8350B

or

respective

are

passed

by

where

INTERFACE

The

INTERFACE

bit

of

the

(4

of7)

the

same

as

specifically

8340A)

HP-IB.

through

first

d

or

is

sending

19

05

address

"PTd"

is

determined

current

8756

that

defined

used

or

an

decimal

decimal

will

command

HP

SYSTEM

to
HP-IB
Sweep

the

a

HP

Pass

for

for

pass

may

by

8756A

3-29

Operating

Information

Model

8756A

address.

For

example,

since

the

HP

8756A

default

address

is

16

decimal

=

10000

binary,

the

default

8756

SYSTEM

INTERFACE

address

is

17

decimal

=

10001

binary.

As

another

example,

if

the

HP

8756A

address

is 7 decimal=

111

binary,

then

the

SYSTEM

INTERFACE

address

becomes

6

decimal

=

110

binary.

An

example

of

pass

through

commands

to

the

HP-IB

Sweep

Oscillator

with

address

19

decimal

using

the

default

HP

8756A

address

is:

1.

Address

device

16

(the

HP-IB

of

the

HP

8756A);

send

the

characters

"PT19;"

or

"PT19[cr][lf]".

2.

Address

device

17

(the

8756

SYSTEM

INTERFACE);

send

sweeper

HP-

IB

commands.

3.

Address

device

16.

This

returns

the

HP

87

56A

to

its

normal

HP-IB

operation.

4.

Subsequent

addressing

of

device

17

will

send

commands

to

the

HP-

IB

Sweep

Oscillator.

An

example

of

pass

through

commands

to

the

HP-IB

Plotter

with

address

05

decimal

using

the

default

HP

8756A

address

is:

1.

Address

device

16

(the

HP-IB

of

the

HP

8756A);

send

the

characters

"PT05;"

or

"PT05

[cr]

[lf]

".

2.

Address

device

17

(the

8756

SYSTEM

INTERFACE);

send

HP-GL

commands

to

the

Plotter.

3.

Address

device

16.

This

returns

the

HP

8756A

to

its

normal

HP-IB

operation.

4.

Subsequent

addressing

of

device

17

will

send

commands

to

the

HP-

IB

plotter.

RESPONSE

TO

UNIVERSAL

COMMANDS

ABORT

The

HP

8756A

responds

to

the

ABORT-message

(IFC,

Interface

Clear

line

set

to

TRUE)

by

stopping

all

Listener

or

Talker

functions.

CLEAR
The

DCL

(Device

Clear)

and

SDC

(Selective

Device

Clear)

messages

clear

all

status

bytes,

the

Request

Mask,

the

HP-IB

of

the

HP

8756A

and

the

8756

SYSTEM

INTERFACE.

The

current

front

panel

settings

are

unchanged.

F(f!;ure

3-4.

HP-IB

Operating Features (5

of7)

3-30

Model

8756A

Operating

Information

PASS
The

it

CONTROL

HP

8756A

cannot

does

take

not

or

REMOTE/LOCAL/LOCAL
The

HP

the

interface

This

LED's

the
the

LOCAL

condition

are

HP

8756A

"L"

key

message,
The

state

an

instrument

instrument

placed

the

also
The

Local)

return

was

in

8756A

placed

HP

8756A

message

to

previously

8756A

LED

is

lit

receives

goes

are

the

LOCAL

of

the

on

remote

is

placed

in

will

local

in

goes

is

in

the

out.

enabled.

REN

on

the

or

Local

return

or

when

when

received.

pass

respond

control

to

LOCKOUT

remote

low

indicated

mode

(TRUE}

when

when

and

INSTRUMENT STATE

its

key

line

this

8756
local

in

Local

Talk

Under

is

is

interface,

SYSTEM

depending

Address,

remote,

On

receipt

disabled.

also

Lockout,

Lockout.

to

local

the

REN

line

the

LOCAL

On

key

power

the

TCT

of

the

HP-IB.

the

it

receives

the

"R"

area

only

of

sensed

by

designated

INTERFACE

on

the

the

mode

when

goes

is

pressed

on,

the

(Take

REN

(Remote}

of

the

the

the

with
state
HP-IB

it

high

HP

Control}

(Remote

its

the

"T"

(Talk}

the

LINE

LLO

8756

as

of
Sweep

receives
(FALSE} •
unless

8756A

Listen

and

front

(Local

SYSTEM

the

the

this

is

message;

Enable}

"L"

panel.

LED

switch

INTERFACE;

pass

PT

command,

line.

Oscillator

the

It

the

LLO

in

local

line

Address.

(Listen)

is

lit

and

Lockout)

through

GTL

(Go

will

message

mode.

thus

on

When

and
the

is

When

is

To

also

When
panel

programmed
PARALLEL POLL & STATUS

The

PPU

the

settings

HP

8756A

(Parallel

8756A

are

does

is

are

also

Poll

first

placed

unchanged.

not

changed,

BIT

not

respond

Unconfigure)

to

TRIGGER
The

HP

message

8756A

..

does

not

respond

SERVICE REQUEST & STATUS BYTES
The

HP

the

1.

2.

3.

8756A

following
A

Service
designed
HP-IB
End

can

Command

of

Operation

initiate

conditions

Request

as

the

Syntax

(SRQ}

pass

(sweep

a

Service

exists:

has
through
Error.

or

in

Remote,

Those

unless

the

messages.

to

the

Request

been

instrument.

plot

the

functions

the

PPC

(Parallel

GET

initiated

completed}.

instrument

"IP"

(Group

(SRQ}

not

command

Poll

Execute

message

by

the

state

specifically

is

received.

Configure)

Trigger}

when

one

instrument

front

or

of

Figure 3-4. HP-IB Operating Fealures

(6

of7)

3-31

Operating

Information

Model

8756A

4.

Self

Test

failed.

5.

Any

front

panel

key

pressed.

6.

Numeric

Entry

completed

(HP-IB

or

front

panel).

7.

Soft

key

only

pressed.

8.

Battery

voltage

low

(for

nonvolatile

memory).

The

actual

condition

may

be

determined

by

executing

a

Serial

Poll

and

then

reading

the

Status

Byte.

A

Serial

Poll

operation

consists

of

sending

the

HP

8756A

its

Talk

address,

sending

the

SPE

(Serial

Poll

Enable)

message,

reading

the

Status

Byte

on

the

bus,

and

sending

the

SPD

(Serial

Poll

Disable)

message.

Both

the

Status

Byte

and

Extended

Status

Byte

are

obtained

by

sending

the

Output

Status

"OS"

command

and

by

immediately

reading

the

two

byte

values,

respectively.

The

Status

Bytes

of

the

HP

8756A

are

described

in

Table

3-6.

The

SRQ

is

cleared

only

by

executing

a

Serial

Poll,

Device

Clear

(DCL),

Selective

Device

Clear

(SDC),

PRESET,

or

sending

the

CS

or

OS

commands.

The

Request

Mask

function

"RM"

can

be

used

to

select

a

particular

set

of

condition(s)

for

initiating

a

Service

Request

(SRQ).

The

mask

value

is

determined

by

summing

the

decimal

values

of

each

selected

condition

that

needs

to

be

determined.

The

default

Request

Mask

is

zero

(no

SRQ's

are

initiated),

which

is

reset

to

this

value

at

power

on.

PRESET

A

self

test

is

first

performed

when

the

"IP"

command

is

received

by

the

HP

8756A,

followed

by

presetting

conditions

as

described

under

INSTRUMENT STATE, PRESET

in

Figure

3-1.

Figure 3-4.

HP-/B

Operating Features (7

of

7)

3-32

Model

8756A

Operating

Information

The

HP

8756A

SYSTEM

the
3-4.

HP

INTERFACE.

Hewlett-Packard

This

desktop
Graphics
HP

8756A
ASCII

characters
explicitly:
Standard

The

address

1:

since

default

addressing

CRT

HP-GL
computer

characters

Modified

most

ASCII

of

the

default

address

the

Graphics

subset

ASCII
are
desktop

Code

the

of

CRT

CRT

The

Graphics

Graphics

allows
plotter
used

Code

available

character

CRT

Graphics

address

the

CRT

Graphics

GRAPHICS

INTRODUCTION

are

also

Language

output

for

labeling

Conversion

computer

set.

of

is

15

using

controlled

commands

the

HP

commands.

only

plotter

is

the

the

decimal.

the

(HP-GL),

8756A
are

when

HP

HP

8756A

default

are

to

shown

Table.

using

commands

8756A

An

by

the

mostly

shown
understand

The

HP

in

These

the

address

is

16
example
addresses

8756

a

subset

in

Table

8756A

Table

modified
"LB"
use

command

the

minus

decimal,

of

is:

of

most

CRT

3-5,

the

1.

Address

characters

2.

Address

commands.

3.

Address

HP-IB

4.
the

operation.

Subsequent
CRT

All

semicolon
ignored.

=

either

device

"PT15:"

device

device

Graphics.

CRT

Graphics

•;•

For

of

16

or

"PT15

17

16.

addressing

Commands

or

a

the

syntax

these

terminators.

(the

(the

This

•[lf]•;

HP-IB

[cr]

8756

returns

of

device

NOTE

examples

[lf]

SYSTEM

must

the

of

the

".

the

17

be

character

HP

8756A):

INTERFACE);

HP

8756A

will

send

terainated

•[cr]•

shown

below,

send

send

to

its

commands

with

a

is

[term)

the

Table

normal

to

4

Figure 3-5.

CRT

Graphics

(1

of

6)

3-33

Operating

Information

Model

8756A

PLOTTING

The

plotting

area

defined

on

the

CRT

display

is

divided

into

graphics

display

units

(GDU's)

where

one

GDU

is

approximately

0.05

mm.

The

plotting

area

and

the

location

of

the

graticule

are

shown

below:

8756

R

CRT

in

GDU / s <

2698'2047

)

,----,----,----,----,-----,----,----,----.----.-~(=2~347,1920)

(237,128)

(0,0)

The

scaling

points

for

bottom

left

and

for

top

right

are

set

at

Pl

=

(0,0)

and

P2

=

(2698,2047),

respectively.

ERASE

PAGE

COMMAND

EP

The

Erase

Page

Command

EPn

erases

graphics

memory

page

n.
Syntax:
EP n

[term]

or

EP

[term]

where

n = 1

to

5.

EP

with

no

parameters

erases

all

five

pages.

Figure 3-5.

CRT

Graphics

(2

of

6)

3-34

Model

8756A

Operating

Information

SELECT GRAPHICS

The
page

Select

on

or

Graphics

off.
Syntax:
GP

n,m

[term]

or

GP

[term]

where

500
page
command

the

n = 1

16

bit

1.

To

is

overflow

Care

Page

should

5

Overflow

If

this
sending
pressing

to

words.

begin

used.

will

so

will
happens,
the

PRESET.

5

to

PAGE

and

GP
writing
If
be

be

exercised

avoid

change

"IP"

COMMAND

Page

Command

m = 1 = On

without

to

over

500

written

NOTE

exceeding

the

normal

conditions

command

GP

GP

and

parameters

a

particular

words

into

when

the

writing

the

normal

or

returning

turns

m = 0

are

written

next

500

display

may

a

graphics

=Off.

selects

Graphics

Graphics

to

Graphics

word

on

be

to

Local

Each

and

Page,

to

that

limit.

the

CRT.

restored

and

memory

page

turns

page,

Page.

by

the

is

on

GP

PLOT
The

the

ABSOLUTE

Plot

point

parameters
Syntax:
PA

x

coordinate,

1

•••

,

•••

A

PA

command
coordinate
specifies

move.

The Y coordinate

location

Any

number

instruction,

memory

in

If

area,

~s

the

order

the

point

a

turned

is

lotting

Absolute

specified

that

,

Xn

pair)

the

in

GDU's

of

2500

line

off.

area

COMMAND

Command

complete

Y1 coordinate

coordinate,

requires

be

absolute

where

coordinate

separated

16

bit

given.
specified

is

draw

The

is

specified.

PA

in

plotter

the

that

specified.

X

location

parameter

the

pairs

by

commas,

words.

by

a

to

the

beam

remains

PA

allows
command.

Yn

both

beam

PA
plotting

The

for

units

(,X~

by

coordinate,

coord1nate)

the

X

The

in

X

GDU's

specifies

is

to

may

be
but
beam

command

area

off

until

movement

the

X

[term]

and

Y

coordinates

coordinate

where

the

move.

listed
the

maximum

will

lies

move

off

limit,

a

of

and

Y

Y2 coordinate,

parameter

the

absolute

after

the

user

to

the

and

point

on

the

beam

coordinate

(a

beam

is

Y

PA
graphics

each

point

plotting

the

beam

the

to

to

Figure 3-5.

CRT

Graphics (3

of

6)

3-35

Model

8756A

Operating

Information

SELECT GRAPHICS

The
page

Select

on

or

Graphics

off.
Syntax:
GP

n,m

[term]

or

GP

[term]

where

500
page
command

the

n = 1

16

bit

1.

To

is

overflow

Care

Page

should

5

Overflow

If

this
sending
pressing

to

words.

begin

used.

will

so

will

happens,

the

PRESET.

5

to

PAGE

and

GP
writing
If
be

be

exercised

avoid

change

•1p•

COMMAND

Page

Command

m = 1 = On

without

to

over

500

written

NOTE

exceeding

the

normal

conditions

command

GP

GP

and

parameters

a

particular

words

into

when

the

writing

the

normal
or

returning

turns

m = 0

are

written

next

500

display

may

a

graphics

=Off.

selects

Graphics

Graphics

to

Graphics

word

on

be

to

Local

Each

and

Page,

to

that

limit.

the

CRT.

restored

and

memory

page

turns

page,

Page.

by

the

is

on

GP

PLOT
The

the

ABSOLUTE

Plot
point

parameters
Syntax:
PA

x

coordinate,

1

. . • , . . • ,

A

PA

command

coordinate

specifies

move.

The

location

Any

number

instruction,

memory

in

If
area,

~s

lotting

the
the

a

turned

is

order
point

line

area

COMMAND

Absolute

specified

that

Xn

requires

pair)

the

absolute

Y

coordinate

in

GDU's

of

coordinate

separated

2500

given.

specified
is

off.

is

PA

Command

in

complete

Y1 coordinate

coordinate,

that

be

specified.

where

16

bit

words.

draw

The

to

beam

specified.

PA

plotter

the

Yn

both

X

location

parameter
the

beam

pairs

by

commas,

by a PA

the

plotting

remains

allows

units

command.

(,Xz

coord

1na

the

The

in

specifies

is

may

be

but

The

beam

command

off

for

movement

by

the

X

and

coordinate,

te)

X

and Y coordinates

X

coordinate

GDU's

[term]

where

the

to

move.

listed
the

will

lies
area
until

after

maximum

move

off

limit,

a

point

of

the

beam

Y

coordinate

Y2 coordinate,

(a

parameter

the

beam

absolute

the

user

to

each

the

plotting

and

on

PA
graphics

the

the

Y

point

beam

is

to

to

Figure 3-5.

CRT

Graphics

(3

of

6)

3-35

Operating

PEN

The
Command

the
Syntax:
PU

PD

Information

COMMANDS
Pen

Down Command
PU

beam

to

[term]
[term]

PD

AND

command

a new

PU

PD

turns

location.

turns

the

the

CRT

CRT

beam

beam
OFF.

ON;

Both

the

do

Pen

not

Model

Up

move

8756A

Neither

require
beam

state

LABEL

The

Label

string

Syntax:

LB

character

The

Label
character
end

of

Before

location
followed

corner

the

beam

space.

command

the

terminator

(on

COMMAND

Command

variables

string

mode
ETX

the

character

using

the
where
by

the

of

the

stops

requires

or

LB

on

can

(the

Label

labeling

PA

first

at

[term].

off)

LB

allows

the

of

CRT

[ETX]

be

terminated

byte

value

string.

Command,

command.

character.

the

lower

nor

permits

the

LETTERING

lettering
display.

is

to

This

left

The

last

only

=

0000

the

begin

After

corner

any

beam

received

of

by

0011

beam
by

point

lettering

parameters;

will

Pen

text,

sending

or

should

using

will
of

the

always

Command.

experssions,

the

decimal

be

moved

the

PU

be

the

a

character,

next

both
retain

ASCII

3)

at

to
command
lower

left

character

the

or

the

the

ABSOLUTE

The

Absolute

which

DIRECTION

characters

COMMAND

Direction

are
Syntax:
DI

run,

run,

1,
0,

-1,
0,-1

rise

rise

0

1

0

[term]

allowable

for

0

for

90

for

180

for

270

degrees

degrees

degrees
degrees

3-36

Command DI

lettered.

values

Figure 3-5.

DI

are:

CRT

specifies

Graphics

(4

of6)

the

direction

in

Model

8756A

Operating

Information

or

DI

[term]

Run

and

rise

values

are

in

decimal

and

specify

the

direction

according

to

the

relationship:

angle

=

arctan

rise
run

where

rise

is

the

vertical

value,

run

is

the

horizontal

value,

and

angle

is

the

value

relative

to

the

positive

horizontal

axis

in

the

cartesian

(x-y)

coordinate

system.

A DI

command

with

no

parameters

selects

the

DI

1,0

values

(horizontal,

0

degrees).

ABSOLUTE

CHARACTER

SIZE

COMMAND

SI

The

Absolute

Character

Size

Command

SI

specifies

the

size

of

characters

in

centimeters.

Syntax:
SI

width,

height

[term]

width,

height

values

allowed

are

0.14

0.17

Smallest

size

(MODE

LABELS

& SOFT

KEY

LABELS)

0.21

,

0.25

(ACTIVE

ENTRY

AREA)

0.28

'

0.34

0.35 0.42

Largest

size

or

SI

[term]

An

SI

command

with

no

parameters

selects

the

smallest

size.

GRAPH

ENHANCEMENT

SELECT

PEN

COMMAND

SP

The

Select

Pen

Command SP

allows

selection

of

beam

intensity.

Syntax:
SP n

[term]

n

values

allowed

are:

0 Beam

off

1

Brightest

Intensity

2

3

4

Lowest

Intensity

The

value

of

n

must

be

an

integer

in

the

range

of

0

through

4.

When

the

SP command

is

received,

the

beam

remains

at

the

last

set

position.

Subsequent

PA

commands

will

be

executed

with

the

new

intensity.

Figure 3-5.

CRT

Graphics

(5

of

6)

3-37

Operating

Information

Model

8756A

LINE

TYPE

COMMAND

LT

The

Line

Type

Command

LT

specifies

the

type

of

line

that

will

be

used

with

the

PA

command.

Syntax:

LT

y,

z

[term]

where

the

z

value

(pattern

length)

is

ignored.

and

where

the

y

values

allowed

are:

0

solid

line

1

solid

line

2

short

dashes

3

long

dashes

After

receiving

the

LT

command,

all

subsequent

PA

commands

the

beam

on

(PD

command)

will

draw

the

specified

pattern.

LT

command

with

no

parameters

will

draw

a

solid

line.

SCALING

OUTPUT

Pl

AND

P2

COMMAND

OP

with

An

The

Output

Pl

and

P2

Command

OP

outputs

the

current

coordinates

of

the

scaling

points

Pl

and

P2

in

GDU's.
Syntax:
OP

[term]

The

format

of

the

output

is

the

following:

Plx, Ply,

P2x,

P2y

[cr]

[lf]

where

Plx

=

lower

left

Pl

x

value

Ply

=

lower

left

Pl

y

value

P2x

=

upper

right

P2 x value

P2y

=

upper

right

P2 y value,

all

in

GDU's.

ADDITIONAL GRAPHICS

CONTROL

DEFAULT

COMMAND

DF

The

Default

Command

DF

sets

certain

graphics

functions

to

a

predefined

state.

Syntax:
DF

[term]

The

following

conditions

are

set

when

DF

is

received:

3-38

DI

1,0

LT

1

SI

0.14,0.17

Lettering

orientation

0

degrees--horizontal

Solid

line

Smallest

size

Fzj{ure

3-5.

CRT

Graphics

(6

o(6)

Model

8756A

Operating

Information

Table 3-1. Function Select

Commands

(1

of

3)

Channel

Selection

CHAN

OFF

l

MEAS

J

RATIO

e

AIR

e

8/R

e

A/8

•

•

•

A

8

R

DISPLAY->MEM

(o

I SPLAY)

•

MEAS

•

MEM

•

M-MEM

AUTO

B

• dBIDIV

MKR->REF

B

•

LEVEL

•

POSN

FRONT

PANEL

KEYS

HP-IB

COMMAND

Cl

C2

CO(Zero)

AR
BR
AB

IA

IB

IR

SM

ME

MY

M-

AS

SDd

MR

RLd

RPq

COMMAND

DESCRIPTION

Channel

1

selected,

all

subsequent

commands

will

apply

to

Chan.

1

until

Chan.

2

is

selected.

Channel

2

selected,

all

subsequent

commands

will

apply

to

Chan. 2 until

Chan. 1 is

selected.

Turn

off

channel.

A

detector/R

detector

Ratio

Measurement

B

detector/R

detector

Ratio

Measurement

A

detector/R

detector

Ratio

Measurement

A

detector

Absolute

Power

Measurement

B

detector

Absolute

Power

Measurement

R

detector

Absolute

Power

Measurement

Store

Measured

Data

in

Memory

Display

Measured

Data

Display

Memory

Data

Display

Measured

-

Memory

Data

Autoscale

Data

on

CRT

Set

Scale

per

Division,

d

set

to

20,

10,

5,

2,

1,

.5, .2,

or

.1.

Moves

the

Cursor

(or

Active

Marker

if

no

Cursor)

and

trace

to

the

reference

line.

Reference

Level

value

in

dB

or

dBm1

value

d

must

be

in

the

range

of

MEAS

RATIO

or

M-MEM:

+90

to

-90

dB •

MEAS

PWR:

+20

to

-70

dBm.

Reference

Position

setting

on

CRT,

where q has

values

from

0

to 8 corresponding

to

the

major

horizontal

graticule

lines:

0 =

bottom

graticule

line

4 =

center

graticule

line

8 =

top

graticule

line

3-39

Operating

Information

Model

8756A

Table

3-1.

Function Select

Commands

(2

of3)

STEP

REF

CURSOR

ON/OFF

CURSOR

MAX

CURSOR

MIN

CURSOR

6 ON/OFF

AVERAGING

OFF

AVERAGING

FACTOR

PLOT

ALL

PLOT

LABELS
PLOT GRID
PLOT

TRACE

1

PLOT

TRACE

2

MOD

ON/OFF

FRONT

PANEL

KEYS

HP-IB

COMMAND

UP
DN

SVn

RCn

IP

MM

SOFT

KEYS

HP-IB

COMMAND

CUm

ex

CN

com

AO

{zero)

AFd

PA

PC
PG
Pl
P2

MOm

COMMAND

DESCRIPTION

Increment

Active

Parameter.

Decrement

Active

Parameter.

Save

Front

Panel

key

settings.

Recall

Front

Panel

key

settings.

Presets

the

8756A

and

the

8756

System

Interface.

Restore

Main

Menu

soft

key

labels

and

functions.

COMMAND

DESCRIPTION

Turns

Cursor

On/Off.

Moves

Cursor

to

maximum

for

active

channel.

Moves

Cursor

to

minimum

for

active

channel.

Turns

Cursor

6

On/Off.

Turns

averaging

off.

Sets

the

averaging

factor;

d

is

set

to

2,4,8,16,32,

64,

128,

or

256.*

Plot

entire

display

{except

user

graphics)

on

external

plotter.

Plot

only

characters/labels

on

external

plotter.

Plot

only

grid

on

external

plotter.

Plot

only

trace

1

data

on

external

plotter.

Plot

only

trace

2

data

on

external

plotter.

Square

wave

modulation

from

rear

panel

outputs

On/Off.

*Averaging is

turned

on

when

AFd

is

received.

AF;

or

AFO; turns averaging

on

with previously set factor.

3-40

Model

8756A

Operating

Information

Table

3-1.

Function Select Commands

(3

of

3)

Blank

CRT

Display

Features

(CRT

graphics

not

affected)

Clear

Status

Format

Data

ASCII

Format

Data

Binary

Pass

Through

Request

Mask

Set

Cursor

Position

Non

Swept

Mode

Swept

Mode

Take

Sweep

Write

Key

Write

Memory

HP-IB

only

FUNCTIONS

HP-IB

COMMAND

BLO

(zero)

BLS

cs

FDO

(zero)

FDl

PTd

RMd

SCd

SWO

(zero)

SWl

TSd

WKq

WM

COMMAND

DESCRIPTION

Restore

display

to

normal.

Blank

All.

Clear

both

Status

Bytes.

ASCII

Format

for

data

with

the

WM,

OD, OC,

and

OV

commands;

units

are

dBm

or

dB,

and

output

in

[+DD.DD)

format,

where

D-= ASCII

digit

.

Binary

Format

for

data

with

the

WM,

OD,

OC,

and

OV

commands;

two

bytes

are

output

in

the

following

scale:

Two

Byte

value

(decimal)

32767

0

MEAS

RATIO

or

M-MEM

+90

dB

-90

dB

MEAS

PWR

+20

dBm

-70

dBm

Designates

the

pass

through

address

for

the

8756

System

Interface.

Mask

selected

bits

of

the

Status

Byte;

d

is a decimal

integer

from 0 to

255.

Places

Cursor

at

horizontal

position

d.

Range:

0

to

400

decimal.

Stop

tracking

sweep

ramp;

freeze

data

on

display.

Continuously

track

sweep

ramp

voltage

and

update

display.

Take d sweeps

of

data,

then

hold

display.

Write

soft

key

label

for

a

particular

soft

key;

q

is

an

ASCII

strinq;

the

first

char-

acter

is

the

soft

key

number,

range

1

to

6.

This

is

fol-

lowed

by

11

[ASCII

label)

[term)

11

or

11

[ASCII

label)

[term),

[ASCII

label]

[term)

11

where

the

[ASCII

label]

<= 7

characters

and

[term]

=

[cr]

[lf)

or

;

Write

Memory

trace

data;

the

#

of

data

points

is

401;

the

format

must

be

previously

set

by

the

FDm

command.

3-41

Operating

Information

Model

8756A

Table

3-2.

Output Commands

HP-IB

COMMAND

FORMAT

COMMAND

DESCRIPTION

FDO

FDl

Output

Cursor

oc

Output

Cursor

or

Cursor6

[+DD.DDD]

[,]

[BB]

[ODD]

amplitude

and

horizontal

[DDD]

[If]

[EOI]

position:

format

set

by

FDm

command.

Output

Data

OD

Output

MEAS

Data

or

MEM

400

[+DD.DDD,]

40l[BB]

[EOI]

Output

Memory

OM

data:

#

of

data

points

is

[

+DD.DDD]

[If]

401:

format

set

by

FDm

command.

Output

Value

ov

Output

current

measurement

[+DD.DDD]

[If]

[BB]

[EOI]

Output

Output

Output

3-42

value:

usually

for

CW

measurements.

Non

swept

mode

swo

and

format

,.

FDm

must

be

previously

set.

Identity

or

Output

the

8756A

identity.

The

character

string

is

"8756A[cr]

[lf]".

Keycode

OK

Output

keycode

for

last

key

[DD]

(lf]

pressed.

Refer

to

Table

7.

Status

OS

Output

Status

Bytes:

the

[BB]

[EOI]

status

byte

is

sent

first

followed

by

the

extended

status

byte.

Then

both

bytes

will

be

cleared.

NOTES

D

=

ASCII

digit

B

=

8

bit

byte

,

= comma

EOI

=

End

or

Identify

HP-IB

line

TRUE

cr

=

carriage

return

lf

=

line

feed

*

If

Averaging

ON,

measured

data

is

averaged

over

a

period

of

(Averaging

Factor)

*

10

milliseconds:

this

averaged

value

is

then

outputted.

output

Model

8756A

Operating

Information

Table 3-3. Cross Reference

of

Tables 3-1

and

3-2

AO

Averaging

Off

AB

A/B

Ratio

Measurement

AFd

Averaging

On

and

Factor

d

AR

A/R

Ratio

Measurement

AS

Autoscale

BLO

Restore

CRT

to

normal

mode

BL5

Blank

All

(except

user

CRT

graphics)

BR

B/R

Ratio

Measurement

CO

Channel

Off

Cl

Select

Channel 1 On

C2

Select

Channel 2 On

COm

Cursor

Delta

On/Off

CN

Cursor

to

Minimum

CS

Clear

Status

Bytes

CUm

Cursor

On/Off

CX

Cursor

to

Maximum

ON

Step

Down/Decrement

FDO

Format

Data

Binary

FDl

Format

Data

ASCII

IA

Absolute

Power A Measurement

IB

Absolute

Power B Measurement

IP

Preset

IR

Absolute

Power R Measurement

MOm

Modulation

On/Off

ME

Display

Measurement

MM

Restore

Main

Soft

Key Menu

MR

Cursor

(or

Marker)

to

Reference

Line

MY

Display

Memory

M-

Display

Measurement

- Memory

OC

Output

Cursor

Value

and

Position

OD

Output

Trace

Data

OI

Output

Identity

OK

Output

Keycode

of

last

key

pressed

OM

Output

Memory

OS

Output

Status

Bytes

OV

Output

Current

Measurement

Value

Pl

Plot

trace

1

on

external

plotter

P2

Plot

trace

2

on

external

plotter

PA

Plot

all

on

external

plotter

(except

user

CRT

graphics)

PC

Plot

labels

on

external

plotter

PG

Plot

grid

on

external

plotter

PTd

Pass

Through

to

address

d

RCn

Recall

Register

n

RLd

Reference

Level

set

to

d

RMd

Service

Request

Mask

RPq

Reference

Position

on

vertical

division

q 0

to

8

SCd

Set

Cursor

to

horizontal

position

d

SOd

Scale

per

Division

set

to

d

SM

Store

Measurement

into

Memory

SVn

Save

Register

n

SWm

Sweep

update

display

On/Off

TSd

Take d sweeps,

then

hold

display

UP

Step

up/increment

WKq

Write

Soft

Key

label

WM

Write

to

Memory

trace

data

NOTE

For

the

WKq

command, q is

an

ASCII

string;

the

first

character

is

the

soft

key

number,

range 1 through

6.

This

is

followed

by

[ASCII

label]

[term]

[, 1 [ASCII

label]

[term]

or

[ASCII

label]

[term],

where

the

[ASCII

label]

is

no

more

than 7 characters

and

[term]

=

[carriage

return]

[line

feed]

or

, •

3-43

Operating

Information

Model

8756A

Table

3-4.

CRT

Graphics

Command~

(1

of

2)

HP-GL

subset.

HP-IB

COMMAND COMMAND

DESCRIPTION

DF

Default~

sets

default

values.

DI

run,rise

Absolute

Character

Direction~

run,rise

allowable

values

are:

1,

0

=

0

degrees

0,

1

=

90

degrees

-1,

0

=

180

degrees

0,-1

=

270

degrees

LB

[text]

[ETX]

Label

text.

Character

set

is

shown

in

Table

5,

8756A

Modified

ASCII

Character

Set.

LTy,z

Line

Type~

the

y =

pattern

number

1

to

4~

z

=

pattern

length

which

is

ignored.

For

y

=

0

or

1 = solid

line

2 = short

dashes

3 = long

dashes

OP

Output

Pl

and

P2

positions.

PA

xl,

yl

Plot

Absolute~

X

and y are

integers

and

(,

x2,

y2,

are

in

Graphics

Display

Units

(GDU'

s).

• • • I

... ,

xN,

yN)

PD

Pen

Down.

PU

Pen

Up.

SI

w,

h

Absolute

Character

Size~

w =

width~

h = height.

Values

allowed

are:

0.14,

0.17

Smallest

size

0.

21,

0.25

0.28,

0.34

0.35,

0.42

Largest

size

SP

n

Select

pen~

n = 0

to

4.

,

0

Pen

up

1

Brightest

Intensity
2
3
4

Lowest

Intensity

The

following

HP-GL

commands

will

be

accepted

but

their

functions

are

not

implemented

and

no

error

will

be

noted:

IM

(Input

SRQ

Mask)

,

IP

(Input

Pl

and

P2),

IW

(Input

Window),

oc

(Output

Current

Position),

OE

(Output

Error),

and

PG

(Output

Page),

SL

(Character

Slant)

,

SR

(Size

Relative

for

characters).

3-44

Model

8756A

Operating

Information

Table

3-4.

CRT

Graphics Commands

(2

of

2)

NON

HP-GL

COMMANDS

HP-IB

COMMAND

COMMAND

DESCRIPTION

Erase

Page

EPn

Erase

Page

n,

where

n = 1

to

5:

if

no n

value

is

given,

all

pages

are

erased.

Select

Graphics

GPn,m

Turn

graphics

page

n

( 1

to

5)

Page

On/Off

On/Off

(m

=

1

or

0) •

Each

page

may

use

up

to

500

16

bit

words.

GP

without

parameters

selects

and

turns

on

page

1.

NOTE

All

Graphics

Commands

must

be

terminated

with

a

semicolon

n.

n

or

,

a

"[linefeed]"

(the

character

[carriage

ret

urn]

is

ignored).

Table

3-5.

HP 8756A Modified

ASCII

Character Set

8756A

MODIFIED

ASCII CODE CONVERSION

TABLE

MOST

SIGNIFICANT

CHARACTER

0

2 3

4 5

6 7

0

centered

*

SP

0

@

p

p

1 HP logo

centered

o

1

A

0

a

q

2

f3

I

2

B

R

b

3

#

3

c s

c s

4

upper-half

tic

$

4

0

T d t

LEAST

5

lower-half

tic

%

5

E u

e

u

SIGNIFICANT

6

lett-half tic

v

& 6

F

v

I

v

CHARACTER

7 right-half tic

rr

7 G

w

g w

8

back

space

..l

8

H

X

h

X

9

1

/2

shift down

J.l.

9

I

y

y

A

line feed

o (degree)

J z

I

z

B

inv. line feed

n

+

K

I

k

l

c

1

/2

shift up

p

<

L

\

0

carriage

return

r M

I

m

I

E

horizontal

tic

e

>

N

"

n

D

F vertical tic

A.

?

0

0

....

EXAMPLES

HP

logo

01

A

41

I

69

v

16

....

7F

line feed

09

(Note:

These

characters

are

output

only

when

the

LB

command

IS

used

directly)

3-45

Operating

Information

Model

8756A

Table 3-6.

HP

8756A

Status

Byte DescnjJtions

Bit#

Decimal

Value

Function

Bit#

Decimal

Value

Function

3-46

7

6

128

64

SRQ

on

8756

Request

System

Inter-

Service

face

SRQ

(SRQ)

7

6

128

64

MAIN

MENU

= 24

Soft

Key

1

32

Soft

Key

2 8

Soft

Key

3

0

Soft

Key

4

16

Soft

Key

5

14

Soft

Key

6 38

CHANNEL

1:

MEAS

RATIO

10

MEAS

PWR

= 2

DISPLAY = 37
SCALE = 18
REF = 13

CHANNEL

2:

MEAS

RATIO = 27

MEAS

PWR

= 30

DISPLAY

= 34

SCALE

21

REF

= 5

STATUS

BYTE

(#1)

5

4

3

2 1

32

16

8

4

2

SRQ

on

HP-IB

SRQ

on

SRQ

on

Soft

SRQ

on

SRQ

on

Syntax

Error

Operation

Key

Only

Change

in

Numeric

Entry

Complete

Pressed

Extended

Completed

(Sweep

or

Status

Byte

(HP-IB

or

Plot)

Front

PaneQ

EXTENDED STATUS

BYTE

(#2)

5

4

3

2 1

32

16

8

4

2

SRQ

on

Low
Battery
Voltage

Table 3-7.

Front

Panel

Keycodes

(Values

are

in

decimal)

ENTRY:
STEP

DOWN

22

STEP

UP

6

0

KEY

20

1

KEY

4

2

KEY

3

3

KEY

7

4

KEY

12

5

KEY

11

6

KEY

15

7

KEY

36

8

KEY

35

9

KEY

39

KEY

19

-

KEY

23

ENT

OFF

= 9

ENT

= 1

DBM

DB

= 33

BK

SP =

17

INSTRUMENT

STATE:

SHIFT

= 25

SAVE = 28

RECALL

= 26

LOCAL = 29

0

1

SRQ

on

Any

Front

Panel

Key

Pressed

0

1

SRQ

on

Self

Test

Failure

Model

8756A

Operating

Information

OPERATOR'S

CHECKS

The

Operator's

Checks

verify

that

the

8756A

is

functioning

correctly.

It

does

not

thoroughly

check

all

specifications

to

their

limits,

but

is

an

appropriate

test

£or

daily

instrument

verification,

incoming

inspection,

or

verification

after

repair

or

replacement

of

digital

circuits.

EQUIPMENT

Scalar

Network

Analyzer

• .

HP-IB

Cable

• . . • . •

Sweep

Oscillator

••..••

Detector

....••....

Microwave

Test

Device

•

*NOTE

. • • . .

HP

8756A

• .HP

10833A/B/C/D*

• • :

.•

:

••.

HP

il664Ais:

• 20

dB

Attenuator

(HP

8491)

These

three

components

are

necessary

to

perform

the

A,

8,

and

R

Detector

Input

Checks.

The

Sweep

Oscillator

is

any

RF

or

microwave

source

capable

of

outputting

at

any

frequency

within

the

frequency

range

of

the

11664A

Detector

(10

MHz

to

18

GHz)

or

the

116648

Detector

(10

MHz

to

26.5

GHz),

and

also

capable

of

outputting

a 0

to

10

volt

sweep

ramp

and

positive

z

blanking.

The

Sweep

Oscillator

also

must

be

able

to

accept

an

external

27.8

kHz

AM

modulation

input.

If

an

external

AM

input

is

not

available,

an

external

modulator,

such

as

the

HP

116658

Modulator,

should

be

connected

to

the

RF

output

of

the

Sweep

Oscillator.

Modulator

Drive

is

available

from

any

of

3 8NC

output

connectors

on

the

Rear

Panel

of

the

8756A.

(The

HP

8350A/B

Sweep

Oscillator

has

internal

27.8

kHz

square

wave

modulation

of

the

RF

output.)

The

Microwave

Test

Device

used

should

be

kept

exclusively

for

these

Operator's

Checks,

so

that

future

comparisons

will

be

valid.

FiKurc 3-6. Operator's

Check

( 1

of

5)

3-47

Operating

Information

Model

8756A

PROCEDURE

The

following

Procedure

assumes

a

working

familiarity

with

the

8756A

front

panel

controls.

Refer

to

Fig.

3-1

for

more

information

on

operating

the

8756A

Front

Panel,

if

necessary.

Refer

also

to

the

Sweep

Oscillator

Operating

&

Service

Manual

for

its

operation.

Self-Test,

HP

INTERFACE BUS,

and

8756

SYSTEM

INTERFACE

Checks

1.

Set

up

the

equipment

as

shown

below.

/

HP·IB
CABLE

-

HP

INTERFACE

8756

SYST

BUS

INTERFAC

.....,

D

CJ!

'D

00000

D

D D

DODD

D

DODD

§:

o,

,o

000000

D

D D

DCJDD

D

D D

D

---'

• • •

SCALAR

NETWORK

ANALYZER

EM

Operator's

Setup

for

Self-Test,

HP-IB,

and

8756

SYSTEM

INTERFACE

Checks

2.

Turn

on

the

8756A.

Press

[PRESET]

to

start

the

built-in

Self-Test

routine.

If

the

Self-Test

passes,

the

graticule,

MODE

LABELS,

and

MAIN

MENU

will

appear

on

the

display.

If

the

Self-Test

fails,

an

error

message

will

be

displayed

in

the

ACTIVE

ENTRY

AREA.

3.

On

the

8756A,

press

the

Soft

Keys

[MORE]

[SERVICE] [A6

HPIB]

•

Press

the

Soft

Key

[HPIB

LSTN]

to

begin

the

first

HP-IB

test.

If

this

test

passes,

the

message

"HPIB

LSTN

PASS"

will

appear

in

the

ACTIVE

ENTRY

AREA.

If

this

test

fails,

a

FAIL

message

will

appear.

Press

[MAIN

MENU]

to

end

this

test.

4.

Press

the

Soft

Key [A6

HPIB]

again

to

run

the

second

HP-IB

test,

then

press

the

Soft

Key

[HPIB

TALK].

If

this

test

passes,

the

message

"HP

TALK

PASS"

will

appear

in

the

ACTIVE

ENTRY

AREA.

If

this

test

fails,

a

FAIL

message

will

be

displayed.

Press

[PRESET]

to

end

this

test,

and

remove

HP-IB

cable.

Figure 3-6. Operator's

Check

(2

of

5)

3-48

Model

8756A

Operating

Information

A,

B,

and

R

Input

Checks

5.

Set

up

the

equipment

as

shown

below.

POS

Z

BLANK

SWEEP

OUT

SWEEP

OSCILLATOR

RF

OUT

I

:

-D:

....

--

--.I

MICROWAVE

TEST

DEVICE

SWEEP

IN

SCALAR

NETWORK

ANALYZER

POS

Z

BLANK

D 0

0~~~~

D D

ODODOO

D D

I I 1

DETECTOR

I I I

Operator's

Check

Setup

for

A,

B,

and

R

Input

Checks

Turn

on

the

Sweep

Oscillator.

Set

Sweep

time

to

approx-

imately

500

milliseconds.

Adjust

the

Start

and

Stop

frequencies

to

include

the

frequency

range

of

the

Microwave

Test

Device

or

the

full

range

of

the

Sweep

Oscillator.

Turn

RF

on.

Record

the

Start

and

Stop

frequencies

for

future

reference.

Connect

the

Detector

output

to

the

A

Detector

Input

of

the

8756A.

On

the

8756A,

press

[PRESET].

Press

Channel

1 [SHIFT]

[MEAS

RATIO]

{CHAN

OFF)

to

turn

Channel

2

off.

6.

Connect

Detector

input

to

the

RF

output

of

the

Sweep

Oscillator

for

a

"thru"

{0

dB

insertion

loss)

connection.

On

the

8756A,

press

Channel

1 [SHIFT] [SCALE] (AUTOSCALE)

to

put

the

trace

on

the

display,

then

press

[MAIN

MENU],

the

Soft

Key

[CURSOR]

to

turn

CURSOR

on,

and

finally

Soft

Key

[CURSOR

MAX

1]

to

find

the

trace

maximum.

Note

the

CURSOR

value

displayed

in

the

ACTIVE

ENTRY

AREA.

If

the

CURSOR

value

is

less

than

+10.00

dBm,

increase

the

RF

power

level

on

the

Sweep

Oscillator

until

the

CURSOR

value

reads

+10.00

dBm.

This

value

is

the

upper

limit

of

the

dynamic

range

of

the

8756A.

On

Channel

1

of

the

8756A,

press

[SHIFT] [DISPLAY] {DISPLAY-->MEM)

to

store

the

trace

in

memory.

Figure 3-6. Operator's

Check

(3

of

5)

3-49

Operating

Information

Model

8756A

NOTE

If

the

Sweep

Oscillator

is

operating

properly,

but

the

CURSOR

value

is

not

reading

the

correct

absolute

power

value,

check

to

see

that

the

27.8

kHz

modulation

has

been

correctly

applied.

If

+10.00

dBm

cannot

be

achieved,

the

upper

level

of

dynamic

range

will

not

be

tested.

7.

Disconnect

the

Detector

from

the

RF

output

of

the

Sweep

Oscillator.

Then,

on

the

8756A,

press

Channel

1

[SHIFT]

[SCALE]

(AUTOSCALE)

to

put

the

trace

on

the

display.

Press

the

Soft

Key

[AVERAGE]

then

[AVG 1 FACTOR]

to

turn

averaging

on

with

a

factor

of

8.

Wait

about

20

seconds

to

allow

averaging

to

settle.

Then

press

[MAIN

MENU]

followed

by

[CURSOR]

and

[CURSOR

MAX

1].

The

Cursor

value

should

display

-50.00

dBm

or

lower.

This

is

the

noise

floor

power

level.

Note

this

information

for

future

reference.

It

is

normal

for

this

value

to

change

+1

dB;

however,

the

noise

floor

should

always

be

-50.00

dBm

or

lower.

8.

Insert

the

Microwave

Test

Device

between

the

RF

output

of

the

Sweep

Oscillator

and

the

Detector.

On

the

8756A,

press

Channel

1 [DISPLAY

M-MEM]

and

then

[SHIFT

SCALE] (AUTO-

SCALE).

Wait

about

20

seconds

to

allow

averaging

to

settle.

Press

[CURSOR

MAX

1]

to

find

the

trace

maximum.

The

CURSOR

value

in

the

ACTIVE

ENTRY

AREA

now

displays

the

insertion

loss

of

the

Microwave

Test

Device.

Note

this

value

for

future

reference.

If

a

HP

7470A

or

9872C

HP-IB

plotter

is

available,

make a hardcopy

plot

of

the

display

for

future

reference.

(Refer

to

Fig.

3-2

for

more

information

on

outputting

to

the

plotter.)

If

a

compatible

plotter

is

not

available,

sketch

the

display,

noting

Start

and

Stop

frequencies,

noise

floor,

and

insertion

loss.

3-50

This

plot

or

sketch

will

be

used

for

comparison

during

future

Operator's

Checks

of

the

A

Detector

Input.

The

characteristics

of

the

Microwave

Test

Device

should

not

vary

significantly

from

one

comparison

to

the

next.

Figure

3-6

Operator's

Check

(4

of

5)

Model

8756A

Operating

Information

9.

Connect

the

Detector

input

to

the

B

input

of

the

8756A.

On

the

8756A,

press

[PRESET] ,

Channel

1 [SHIFT]

[MEAS

RATIO]

(CHAN

OFF)

to

turn

Channel

2

off,

and

select

Channel

1

[MEAS

PWR]

to

B.

Repeat

Steps

6

through

8

for

the

B

Detector

Input.

10.

Connect

the

Detector

input

to

the

R

input

of

the

8756A.

On

the

8756A,

press

[PRESET] ,

Channel

1 [SHIFT]

[MEAS

RATIO]

(CHAN

OFF)

to

turn

Channel

2

off,

and

select

Channel

1

[MEAS

PWR]

to

R.

Repeat

Steps

6

through

8

for

the

R

Detector

Input.

11.

If

any

test

fails,

or

Microwave

Test

Device

measurements

do

not

reasonably

match

previous

measurements,

refer

to

the

Performance

Tests

in

Section

IV.

12.

When

finished

with

the

Operator's

Checks,

reconnect

the

8756A

with

the

cabling

configuration

necessary

for

correct

operation

with

your

Sweep

Oscillator

(the

HP

8340A

and

8350B

require

additional

connections).

Figure

3-6.

Operator's Check

(5

of

5)

3-51/3-52

MANUAL

C

.t:l

A N G E S

MANUAL

lDENTIFICATION

Model

Number:

8756A

Date

Printed:

August I

S.83

Part

Nu~ber:

08756-90013

This

supplement

contains

important

information

for

correcting

manual

errors

and

for

adapting

the' manual

to

instruments

containing

improvements

made

after

the

printing

of

the

manual.

To

use this

supplement,

make all

ERRATA

corrections

and

all

appropriate

serial

number

related changes

i.1dicated in the tables below.

SERIAL

PREFIX

OR

NUMBER

MAKE

MANUAL

CHANGES

SERI.AL

PREFIX

OR

NUMBER

....

MAKE

MANUALCHANGE.S

2404A

1

-

..

,

..

...

NEW

ITEM

NOTE

Manual

change

supp!ements

are revised

dS

often

as

necessary

to

keep

manuals

as

current

and

accurate.

as

possible.

Hewlett-Packard

recommends

that

you

periodically

request

the

latest

edition

of

this

supplement.

Free

copies

a~e

·ava(l;lb)e

from

all

HP

offices.

When

requesting

copies,

quote

the

ma11ual

identificati0n

information

from

your

supplement,

or

the

mode!'

number

and

print

date

from

the

title

page

of

the

manuaL

Pnnted

tn

U.S.A

16

MARCH

1984

6 pages

08756-90013

ERRATA

Page

1-0.

Figure

1-1:

To note at bottom

of

Figure add:

For

HP-IB Interface

Cable

lengths available. refer to Section

II.

.... Page

1-3.

Paragraph

1-30:

Add:

SOFTWARE

OPTION

85015A system software may be

purchased

as an

HP

8756A option.

Order

as follows:

OPTION

201

3Vz

in discs for use with

an

HP

9816S

computer

with

an

HP

9121

disc drive

OPTION

202

5V4

in discs for use with

an

HP

9816S

computer

with

an

HP

82901

M disc drive

OPTION

203

5V4

in discs for use with either an

HP

9826S

or

9836S

computer

Page

1-3.

Paragraph

1-31:

Delete

Option

907.

Page

1-3.

Paragraph

1-35:

Delete

Option

909.

Add:

Option

913,

Rack

.Mount

Kit

Model8756A

·Option

913

(HP

Part

No. 5061-2072)

contains a pair

of

flanges

and

the necessary

hardware

to

mount

an

HP

8756A

that

HAS

handles, in

an

equipme-nt rack.

Horizontal

s"pacing

is

482.6

mm ( 19

in). Refer to Section II

for details.

.... Page

1-9,

Table

1-3:

Add:

*P = Performance

Test

A=

Adjustment; T

=Troubleshooting.

.... Page

1-10,

Table

1-3:

Add:

*P

=Performance

Test;

A=

Adjustment; T Troubleshooting.

Page 2-9, Figure 2-5:

Delete

Option

907

(front

handles

are

standard

on

the

HP

8756A).

Page

2-1

L Figure 2-7:

Delete Item

3.

' ....

Change

Option

909 to

option

913, 5061-2072.

Page 3-i:

.... Add:

The

recommended

cleaner

for use

on

the inside

of

the

CRT

cover

is

HP

Part

Number

8500-2163.

Insert

after page 3-L the"8756A

PROGRAMMING

INFORMATION

CLARIFICATION."

and

the

"EXAMPLES

OF

SELECTED

8756A

COMMANDS

USING

HP

SERIES

200

COMPUTERS"

of

this

change

sheet

OPERATING

INFORMATION

Page 3-7. REF:

Add:

...

NOTE

The

8756A·

has

three

indep~ent

.refer11nce

levels;

one

f~r

each,.

display

mode

(MEAS,

MEM,

and

M-MEAS).

Tbe

reference

level

for

the

MEM

m({cfe

'i; s;t

to

the

current

reference

~evel

of

the

MEAS

mode

whenever··

DIS

PLAT->

MEM

IS

pressed.

Model8756A

08756-90013

ERRATA

(Cont'd)

Page

3-9.

Figure

3-1:

Add

the following to

paragraph

2:

After Power

On

or

PRESET. the

REFERENCE

LEVEL step size is set to the

current

SCALE

per

division

value. After a specific step size

is

set. this

constant

value will remain. regardless

of

the SCALE value.

Page 3-10. Figure 3-1:

Add

to NOTE:

When

using the 8340A Alternate Sweep

must

be between registers I

and

2.

STEP

keys

on

both the 8756A

and

the 83508

or

8340A

cannot

be used to step through RECALL registers

of

both

front panel states.

The

STEP

keys

on

the 83508

or

8340A may be used

to.

step through their

own

RECALL front panel registers.

Page 3-11. Figure 3-1:

Add the following to

paragraph

I:

n.

Reference Level

STEP=SCALE

per division value.

Page 3-25. Figure 3-3:

Add

to NOTE:

Since this

SWEEP

IN

0-IOV

input

is

requireci stopping the sweep, such as placing the sweep oscillator in

CW

mode. will place the 8756A in a waiting for sweep state.

CW

mode is usable as long as the sweep ramp

is

provided.

(On

the 83508 Sweep Oscillator, the sweep

ramp

is provided

when[SHIFTI

[CW]

is

pressed

On

the 8340A Synthesized Sweeper, the [CF]

[~F]

mode

must

be useci with

~F

set to

100

Hz).

Page 3-27, Figure 3-4:

Delete "'or

M-MEM"

Page 3-37,

SP

n [term]:

Under

COMMAND

DESCRIPTION

for HP-IB

COMMAND

SP

n,

delete 4

and

change

3 to "Lowest

Intensity."

Change

the first sentence in the description to read:

The value

of

n must be

an

integer in the range ofO

through

3.

Page 3-42,

Table

3-2:

Add

[EOI]

to terminate all

data

formats.

Under

Output

Cursor.

Change

FDI

to

[88]

[88]

[EOI].

Page 3-43,

Table

3-3:

Change''lFI)O"

to"f'Dl"

Ch<;t.I~{ge

"FDI"

to '"FOO"

Page JA4,

SP

n:

!·

• ·

··:

Under

COMMAND

DESCRIPTION

for HP-IB

COMMAND

SP

n,

delete 4

and

change

3

to

"Lowest

Intensity"

~Page

3-45.

Table

3-5:

Add:

Not~:

c:·aracter set is Hexadecimal.

3

087

56-90013

Model8756A

4

ERRATA

(Cont'd)

OPERATING

NOTES

8756A/8350

8/0000-99

Page

3.

Figure

3:

Change

the

REFLECTED

arm

loss

of

the

DIRECTIONAL

BRIDGE

to

-6

dB

Page

4.

Figure

4:

Change

11664B to 11664A

PROGRAMMING

NOTES

Quick

Reference

Guide

Page

7.

Take

Sweep:

To

Command

Description add: Nonswept mode,

SWO.

must be previously

set

Page

8,

Output

Cursor.

Under

FORMAT,

change

FDl

to

(BB)

[BB)

[EOI).

Page

10

SP

n:

Under

COMMAND

DESCRIPTION

for HP-IB

COMMAND

SP

n,

delete 4

and

change

3 to "Lowest

Intensity".

CHANGE

1

This

change

implements Revision 2.0 Firmware.

OPERATING

INFORMATION

Page 3-4, Figure 3-1:

To

D,

add:

The

active

channel

is

shown

with a

higher

display intensity.

Page 3-23, Figure 3-2:

Above

SERVICE.

add

the soft key

FREQ

LBL

ON/OF.F.

1 • , ,

•.

Add:

FREQ

LBL

ON/OFF

turns

ON

and

OFF

the

CRT

display

of

frequency information.

Page

3-40, Table 3-1:

Add

FREQ

LBL

OFF, BLI,

Turns

CRT

frequency

information

OFF

(BLO

turns

information

back

on).

Page 3-43,

Table

3-3:

Add

BLI. Frequency labels

OFF

(BLO

turns

frequency back on).

Page 3-53/3-54.

Appendix

A:

To the

MGRE

MENU. above

SERVICE.

add

the soft key

FREQ

LBL

ON/OFF.

Back Cover. SUBJECT

INDEX

Add

FREQ

LBL

ON/OFF

23.

40.

53.

Model8756A

08756-90013

CHANGE 1 (Cont'd)

OPERATING

NOTE

Page

7,

Fifth paragraph:

To the first sentence. add:

(when

more

than

one

channel

is

displayed

active

channel

information

is

shown with a

higher display intensity).

Page

8.

Figure

8:

To the

MORE

MENU

above SERVICE.

add

the soft key

FREQ

LBL

ON/OFF.

Page

18:

Add:

FREQ

LBL

ON/OFF.

Page

22,

first column:

Change

SHIFT

CW

to

CW.

Page

27.

Figure

22:

FREQ

LBL

ON/OFF

turns

ON

and

OFF

CRT

display

of

frequency information.

To the bottom left

menu. above the soft key SERVICE,

add

the soft key

FREQ

LBL

ON/OFF.

PROGRAMMING

NOTES

Quick

Reference

Guide

Page

6,

Table

I:

Add

FREQ

LBL OFF. BLL

Turns

CRT

frequency

information

OFF

(BLO

turns frequency information

back on).

Page

9.

Table

3:

Add

BLL Frequency labels

OFF

(BLO)

turns frequency

information

back on).

Introductory

Operating

Guide

8756/Series 200

Programming

Note

Page

20,

Table

3:

Add

BLI, Frequency labels

OFF

(BLO

turns frequency

inf0rmation

b&(tk

otr).

·';)

Introductory

Operating

Guide

HP

8756NHP

85

Programming

Note

Page

19.

Table

3:

Add

BLI. Frequency labels

OFF

(BLO

turns frequency

back

on).

'-, ~ !..

I '

5

087 56-90013

Model8756A

6

8756A

PROGRAMMING

INFORMATION

CLARIFICATION

The

following

paragraphs

clarify

and

augment

the

programming

information

in Section III (Operation)

of

this

manual.

Input

Selection

Select the desired

input

(lA

AR

etc.)

ONLY

while in the Swept

mode(SWl).

When

using the

Take

Sweep

command

(TSn).

prior

to

performing a Trace

Transfer(OD).

select the

input

BEFORE

placing

the

HP

8756A in the

Non

Swept

mode

(SWO).

If

already in the

Non

Swept mode.

the

HP

8756A

MUST

be

returned

to the Swept mode

BEFORE

selecting the

input

(eg.

OUTPUT

716:

"SWl

AR

SWO").

External

Modulation

When

using External Modulation. note

that

the

HP

8756A

MODULATION

ON/OFF

state

is

NOT

stored in the

SAVE/RECALL registers.

and

must be set manually.

Alternate

Sweep

When

programming

the Alternate sweep mode. the following

method

is

recommended:

OUTPUT

716:

"RC3"

This

recalls register 3 from the

HP

8756A

OUTPUT

717;

"ALI4"

This

alternates register 4 from the source.

OUTPUT

716

This

exits Pass-Through.

Using

Pass-

Through

Mode

Ensure

that

instruments

are not set to the

HP

8756A Pass-

Through

address.

General

Programming

Information

When

using a

TIMEOUT

interrupt

set the time

parameter

to a

minimum

of

5 seconds

(without

a plotter)

and

9

seconds (with

an

HP

9872C

or

7475A).

The

instruments

require this time to

complete

their

Instrument

Preset

functions.

The

powerful

Alternate

Sweep function

of

the

8756A

and

source

combination

is

fully programmable.

While

in

Alternate

Sweep. the source may be

programmed

via

the··

Pass

Through"

mode

of

the

87

56

A At least

one

of

the

following codes must be

included

when

programming

the source in

Alternate

Sweep:

FA

FB. CF. DF.

ST.

MI.

M2. M3. M4. M5.

or

PL

When

the 8756A receives a

command

to

output

a value.

that

value must be

read

before

another

command

may be

sent

If

all values are not

read

the 8756A will ignore

further

commands

from the

computer

until the values

are

read

or

until it

is

Preset

or

Cleared