Agilent 8904A Operator Manual

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,

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. : .

www

agilent

corn

.

Ag i lent Technologies

Innovating

June

the

8,2000

HP

Way

Agilent

24001

Liberty

Technologies.

E

Mission

take,

WA

Inc

99019

Dear Customer,

As

of

November

1,1999,

four

of

Hewlett-Packard's businesses, test and measurement, semiconductor products, health care solutions, and chemical analysis became a new company, Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of Agilent Technologies.

At Agilent Technologies, we are working diligently to make this transition as smooth as possible for you. However, as a result of this transition, the products and related documentation contained in this shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies name and

logo,

or a combination of both. Information in this package may refer to Hewlett-Packard

(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded

products with the same model number are interchangeable. Whatever logo you see, the information, products, and services come from the same reliable source.

If

you have questions about Agilent Technologies products and services, please visit our website at

http://www.aailent.com.

Sincerely,

Rebranding Team

HP

8904A

MULTIFUNCTION SYNTHESIZER

(Including

2712A

Options

Operation

This

manual applies directly

serial numbers prefixed

and

all

For additional important information about serial numbers, refer THIS

MANUAL”

This material may be reproduced by Government pursuant der the clause at

001,

and

SERIAL

MAJOR

to

002,

003,

004,

Calibration Manual

NUMBERS

to

instruments with

changes

rev.

“INSTRUMENTS COVERED in Section

Third Edition

DFARS

that

apply

to

your

01

JUL91

1.

or

for the

to

the Copyright License

52.227-7013

(APR

1988).

instrument.

005

BY

U.S.

un-

and

006)

Copyright@ HEWLETT-PACKARD COMPANY 1989

EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U.S.A. 99220

Operation and Calibration Manual HP Part 08904-90007

Other Documents Availiable: Operation and Application Guide HP Part 08904-90006 Service Manual HP Part 08904-90008 Microfiche OpetationKalibration Manual HP Part 08904-90019

Printed in

U.S.A.

:

September 1992

HEWLETT

PACKARD

1

Regulatory Information

(Updated March

1999)

1

Regulatory Information (Updated March

Safety Considerations

GENERAL

This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation.

1999)

This product "Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a safe condition. This instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in condition.

SAFETY EARTH A uninterruptible safety earth ground must be provided from the main power source

product input wiring terminals, power cord, SAFETY

A

Indicates instrument damage can occur if indicated operating limits are exceeded.

A

Indicates hazardous voltages.

&

Indicates earth (ground) terminal

WARNING

has

been designed and tested

in

accordance

with

IEC

Publication

GROUND

or

supplied power cord set.

SYMBOLS

A

WARNING note denotes a hazard. It calls attention to a procedure,

practice, or the like, which,

could result in personal injury. sign until the indicated conditions are

if

not correctly performed or adhered to,

Do

not proceed beyond a WARNING

fully

understood and met.

1010,

a

to

safe

the

CAUTION

A CAUTION note denotes a hazard. procedure, practice, or the like, which, to, could result in damage not proceed beyond an CAUTION note until understood and met.

to

or destruction of

It

calls attention to an operation

if

not correctly performed

or

adhered

part

or

all of the product.

the

indicated conditions are fully

Do

2

Chapter

1

Safety Considerations for this Instrument

WARNING

This product is a Safety Class I instrument (provided with a

protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in protective earth contact. Any interruption

conductor inside or outside of the product is likely product dangerous. Intentional interruption is prohibited.

Whenever it is likely that the protection has been impaired, the instrument must be made inoperative and be secured against any unintended operation.

If

this instrument

is

to be energized voltage reduction), make sure the common terminal the earth terminal

If

this product is not used

of

the power source.

the equipment could be impaired. This product must be used in normal condition (in which

Regulatory Information (Updated March

a

socket outlet provided with

of

the protective

to

make the

via

an auto transformer (for

is

connected to

as

specified, the protection provided by

all

means for protection are intact) only.

1999)

~

a

No

operator serviceable parts in this product. Refer servicing to

qualified personnel.

To

prevent electrical shock, do not remove

covers. Servicing instructions are for use by qualified personnel only. To

avoid electrical shock, do not perform any servicing unless you are qualified to do

The opening dangerous voltages. Disconnect the product from while

it

is

The power cord

5

live for

seconds after disconnecting the plug from its power supply.

so.

of

covers

being opened.

is

connected to internal capacitors that

or

removal of parts is likely to expose

all

voltage sources

my

remain

For Continued protection against fire hazard, replace the line fuse@) only with example, normal blow

250

V

fuse(s)

or

the same current rating and type (for

or

time delay). Do not use repaired fuses or

short circuited fuseholders. Always use the three-prong ac power cord supplied with this

to

product. Failure

ensure adequate earth grounding by not using

this cord may cause product damage. This product is designed for use in Installation Category

Pollution Degree 2 per

INDOOR

USE

ONLY.

ZEC

1010

and

ZEC

664

respectively.

I1

and

FOR

Chapter

This product has autoranging line voltage input, be sure the supply voltage

1

is

within the specified range.

3

Regulatory Information (Updated March

To

prevent electrical shock, disconnect instrument from mains (line) before cleaning. to clean the external case parts.

Ventilation Requirements: When installing the product in a cabinet, the convection into and out of the product must not be restricted. The ambient temperature (outside the cabinet) must be less than the maximum operating temperature watts dissipated in the cabinet. cabinet is greater than used.

1999)

Use

a dry cloth or one slightly dampened with water

Do

not attempt to clean internally.

of

the product by

If

the total power dissipated in the

800

watts, then forced convection must be

4"

C

for

every

100

Product

CE

accompanied by a year indicated the year the design was proven.

CSA

-

the

-

the

Markings

CE

mark

CSA

mark

is

a

registered trademark

is

a registered trademark

of

the European Community.

of

the Canadian Standards Association.

A

CE

mark

4

Chapter

1

CERTIFICATION

Hewlett-Packard Company certifies thut this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other International Standards Organization members.

WARRANTY

This Hewlett-Packard instrument product of one year from either repair or replace products which prove

For warranty service or repair, this product must be returned prepay shipping charges

shall

pay

all

HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument. HP does not warrant of the instrument, or software, or firmware will be uninterrupted or error free.

date

of shipment. During the warranty period, Hewlett-Packard Company will at its option,

to

HP and HP shall pay shipping charges

shipping charges, duties, and taxes for products returned

is

warranted against defects in material and workmanship for a period

to

be defective.

to

a service facility designated by HP. Buyer shall

to

return the product

to

HP from another country.

to

Buyer. However, Buyer

that

the operation

LIMITATION OF WARRANTY

The foregoing warranty shall not apply Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

to

defects resulting from improper or inadequate maintenance by Buyer,

EXCLUSIVE REMEDIES

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

ASSISTANCE

Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products.

For

any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided at

the back of this manual.

SAFETY

GENERAL

This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation.

This product with a protective earth terminal).

BEFORE APPLYING POWER

Verify that the product is set to match the available line voltage and the correct fuse is installed.

SAFETY EARTH

An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals, power cord, set.

SAFETY SYMBOLS

A

is necessary for the user to refer to the instruction manual (refer to Table of Contents).

f

VI

procedure, practice, performed

jury.

Do

the indicated conditions are fully understood and met.

is

a Safety Class I instrument (provided

GROUND

or

supplied power cord

Instruction manual symbol: the product will be marked with this symbol when it

Indicates hazardous voltages.

Indicates earth (ground) terminal.

The WARNING sign denotes a

It

hazard.

or

the like, which, if not correctly

or

adhered to, could result in personal in-

not proceed beyond a WARNING sign until

calls attention to a

CONSIDERATIONS

Any interruption of the protective (ground-

or

ing) conductor (inside

or

ment) terminal will came a potential shock hazard that could result

ing

is not sufficient protection).

Whenever been impaired, the instrument must be made inoperative and be secured against any unintended operation.

If this instrument is to be energized via an

autotransformer (for voltage reduction) make

sure the common terminal

earth terminal of the power source.

Servicing instructions are for use by servicetrained personnel only.

electric shock, do not perform any servicing unless qualified to do

Adjustments described formed with power supplied to the instrument while protective covers are removed. Energy available at many points may, if contacted, result

Capacitors inside the instrument may still be charged even connected from its source of supply.

disconnecting the protective earth

in

personal injury. (Ground-

one conductor of a two conductor outlet

it

is likely that the protection

in

personal injury.

if

the instrument has been dis-

outside the instru-

is

connected

To

avoid dangerous

so.

in

the manual are per-

to

has

the

The CAUTION sign denotes a haz-

ard. It calls attention to an operating procedure, practice, or the like, which, if not correctly performed or adhered to, could result in damage to not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

or

destruction of part

or

all

of

the product.

Do

For

continued protection against fire hazard,

250V

Do

fuse(s)

not use

replace the line fuse(s) only with of the same current rating and type (for exam-

ple, normal blow, time delay, etc.).

or

repaired fuses

fuseholders.

short circuited

ATTENTION

Static Sensitive

Devices

This instrument was constructed charge) protected environment. This conductor devices used by static discharge.

Depending on the magnitude of the charge, device substrates can be punctured charge. The results can cawe degradation of device performance, early failure,

These charges are generated tact, separation working with static sensitive devices.

When handling devices, adequate precautions must be taken to prevent device dam-

or

age Only those who are thoroughly familiar with industry accepted

techniques for handling static sensitive devices should attempt to service circuitry with these devices.

In all instances, measures

build-up

For further information HANDLING CONSIDERATIONS FOR STATIC SENSITIVE DEVICES” in Section VIII Service Section.

or

destruction.

on

work surfaces and persons handling the devices.

in

this instrument are susceptible to damage

destroyed by contact

immediate destruction.

of

materials, and normal motions of persons

or

servicing equipment containing static sensitive

must

on

ESD precautions, refer to “SPECIAL

in

an ESD (electro-static dis-

is

because most of the semi-

or

mere proximity of a static

in

numerous ways such

be taken to prevent static charge

as

simple con-

Model 8904A Volume 1 Contents

VOLUME

Section

Introduction Safety Considerations

Description

Specifications 1.3

A

Options 1-7 Mechanical and Document Options and Accessories Electrical Options

Hewlett-Packard Interface Bus

Accessories Supplied Recommended Test Equipment Documentation Updating

1 . General Information

.....................................................

................................................

.....................................................

........................................................

..................................................

Option 001: Option002: Option Option Option006

Compatibility 1-9 Selecting the HP-IB Address

....................................................

003:

....................................................

005:

....................................................

...........................................

....................................................

..........................................

.................................................

..........................................

.............................................

Serial Numbers 1-10

A

Description

Signing Up

................................................

of

the Manual Update Packet

for

the Documentation Update Service

1

CONTENTS

...............................

................................

.............................

1.1

1.2

. 1-2

1-7

1-8

1-8 1-8 1-9 1-9

1-9

1-9 1-9

1-10 1-10

Section

Introduction Initial Inspection 2.1 Preparation

Storage And Shipment 2-4

2 . Installation

.....................................................

2.1

...................................................

For

Line Voltage Selection and Fuse Replacement Power Cables 2.2

HP-IB Address Selection 2.2 Interconnection 2.4 Mating Connectors 2.4 Operating Environment 2-4 Bench Operation 2-4

Rack

Mounting 2-4

.................................................

Use

................................

...................................................

............................................

.................................................

...............................................

.............................................

.................................................

2.1

2-2

................................................

Environment 2-4 Packaging

...................................................

.....................................................

2-4

rev.OlNOV89

Volume 1 Contents Model 8904A

Section

Introduction Block Diagram

How to Create and Output Instrument Functions and Operating Considerations

Di~talPo

Remote Operation

General Information Programming Considerations HP-IB Compatibility HP-IB Code Listings for the HP 8904A

Status Byte

General Information Using the

Error

Special Functions

Introduction Special Special Special

Special 3: Reverse Modulating Waveforms Special 4: Disable Output Blanking

Special Special

Special 7: Configure

Operating Technical Reference

Waveform Jitter Fine Amplitude Resolution

Filters Phase Resolution Phase Continuous Switching

MenuMap

Selecting Menus Menu Changes When Using HP-IB Control

3

.

Operation

.....................................................

....................................................

Functional Block Descriptions

a

Signal

.........................................

.......................................

...............................

a

Standard Instrument: Creating How the HP 8904A Generates Operating Considerations: All Instruments

Abbreviated Channel A Specifications Option 001 . Three More Channels, Summation, Modulation, and Sequencing

Expanded Capabilities for Option 001 Operating Considerations: Option 001

Abbreviated Specifications: Option 001

.

A

Option 002 Operating Considerations: Option 002

Abbreviated Specifications: Option 002 Option 003

Operating Considerations: Option 003 Abbreviated Specifications: Option 003

Second Channel and Output

.

Frequency, Amplitude, and Phase Hopping

Simple Signal From Digital Data

a

Signal

....................................

..................................

.....................................

....................................

...................................

................................

....................................

...................................

..........................

....................................

...................................

.....................

......................................................

General Information Connector hnctions

..............................................

.............................................

............................................

..............................................

.........................................

.............................................

...................................

.....................................................

..............................................

Status

Isolation

Codes and Help Messages

Byte

.............................................

.................................................

.........................................

..................................................

0:

Last

State Recalled on Power Up

1:

Disable Automatic Phase Reset

2:

Disable Beeper

...........................................

.................................

..................................

.................................

.....................................

5:

Floating Outputs on Power Up:

6:

Enable Synchronous mode:

as

Master Controller:

..................................

....................................

.................................

..........................................

................................................

..........................................

......................................................

...............................................

.........................................

.....................................................

................................................

................................

..............

3C-1

3-15 3-15

3-15

3-18 3-18 3-18 3-19 3-19 3-31 3-31 3-31 3-32

3-34 3-37

3-37 3-37 3-37 3-37

3-37 3-38

3-38 3-38

3-38 3-39

3-39 3-39

3-41 3-42 3-42

3-44 3-44

3-44

3.1

3.2

3.3

-3-4 3-6

3.6

3.7

3.8

3.9

3-10 3-10

3-12 3-12

3-12 3-13

3-14 3-14

rev

.

01

NOV89

Model 8904A Volume 1 Contents

Hop

RAM

Sequencing General Description Detailed Operation HP-IB Operation

FM Stereo Composite Generator

General Description Detailed Operation HP-IB Operation

Multi-Instrument Phase Synchronization

Introduction General Description

Electrical Connections

Detailed Operating Instructions

HP-E3 Operation Specifications

High Power Balanced Output

Introduction General Description Operating Considerations HP 8904A Option

Expanded Capabilities for Option 001

..............................................

.............................................

..............................................

.........................................

.............................................

..............................................

....................................

................................................

............................................

......................................

..............................................

................................................

..........................................

................................................

..............................................

..........................................

006

Specifications

....................................

......................................

.3 C.l

3C-1 .3 C.l .3 C.5

3C-7

3C-7 .3 C.7

3C-10

3A-1 .3

A.l

.3

A.2

3A-2

3A-3 .3 A.7 .3

A.8

.3 B.l .3 B.l

3B-1

3B-2

3C-1

Section

Introduction Equipment Required Performance Test Record

Calibration Cycle Basic hnctional Checks Introduction Equipment Required Performance Test Record Calibration Cycle Basic Functional Checks Performance Test

Performance Test 2 - AC Amplitude Flatness Performance Test 3 - Spectral Purity

Performance Test 4 Performance Test Performance Test Performance Test 7

Performance Test Performance Test 9

4

.

Performance Tests

.....................................................

.................................................

..............................................

...................................................

...............................................

.....................................................

.................................................

..............................................

...................................................

...............................................

1

-

AC and DC Amplitude Accuracy

......................................

-

Phase Accuracy

5

-

Channel-to-Channel Phase Accuracy (Option 001

6

-

Output l-to-Output 2 Phase Accuracy (Option 002)

-

Tone Sequence Timing Accuracy (Option 001)

8

-

DTMF Sequence Timing Accuracy (Option 001)

-

Digital Sequence Period Accuracy (Option 001)

.....................................

.............................

..................................

..................

.................

....................

...................

4.1

4.3

4.4

4-10 4-14

4-17 4-20 4-22

4-26 4-30

rev.01

NOV89

Volume 1 Contents

Model 8904A

Section

Introduction 5.1

Safety Considerations 5.1 Equipment Required Post-Repair Tests, Adjustments, and Checks Adjustment

Adjustment Adjustment Adjustment 4 Adjustment Adjustment Adjustment

5

.

Adjustments

.....................................................

................................................

.................................................

...................................

1

-

Output Gain and Offset

2

-

Output Balance

3

-

Output Gain (Option

-

Sharp

Cutoff Low-Pass Filter

5

-

Sine

X/X

6

-

Display Backlighting and Contrast

7

-

Phase Synchronization (Option

..........................................

Compensation

.....................................

006)

....................................

..................................

....................................

..............................

005)

.............................

5.2

5-4

5.6

5.7

5.8

5-11 5-13 5-14

rev.OlNOV89

Model 8904A General Information

1-1.

INTRODUCTION

This manual contains information required to install, operate, test, and adjust the Hewlett-Packard Model 8904A Multifunction Synthesizer. The Multifunction Synthesizer throughout this manual. This manual documents standard Multifunction Synthesizers and Multifunction Synthesizers supplied with four internal channels, Option second output port, Option 002, Hop

Operating and reference information for other options is provided in the operating supplements the end of section

This section of the manual describes the instruments documented by this manual; it includes an instrument description, options, accessories, specifications, and other basic information. The other sections contain the following information:

Section

address selection for remote operation, and storage and shipment.

Section

operating instructions for both local and remote operation, and operator’s maintenance information. Operating information for options after Option 004 is provided in the form of separate supplements.

2,

Installation:

3,

Operation:

Section

1

GENERAL INFORMATION

HP

8904A will generally be referred to as the

Ram

capabilities, Option

3.

provides information about initial inspection, preparation

provides information about panel features and includes operator’s checks,

003,

and rear panel outputs, Option

for

use, HP-IB

001,

004.

a

at

Section

instrument against the critical specifications listed in table

Section

One copy of the operating information is supplied with the Multifunction Synthesizer. An additional copy of the Operating Manual may be ordered separately through your nearest Hewlett-Packard office. Its part number is listed on the title page of this manual.

Also listed on the title page of this manual, below the manual part number, is a “Microfiche” part number. This number may be used to order of this manual. Each microfiche contains up to 96 photo-duplicates of the manual’s pages. The microfiche package also includes the latest Manual Updates information.

4,

Performance Tests:

5,

Adjustments:

provides the information required to check performance of the

1-1.

provides the information required to properly adjust the instrument.

100 x 150

millimeter (4- x 6-inch) microfilm transparencies

rev.OlNOV89

1-1

General Information Model

1-2.

SAFETY CONSIDERATIONS

This product is a Safety Class I instrument, that is, one provided with a protective earth terminal. The

all

Multifunction Synthesizer and safety markings and instructions before operation. Refer to the Safety Considerations pages found at the beginning of this manual for a summary of the safety information. Safety information pertinent to the throughout this manual.

1-3.

DESCRIPTION

The

to

square wave, and white (Gaussian) noise. The standard instrument is equipped with a single internal channel three additional internal channels with modulation capabilities, and the ability to fast-hop between different phase, frequency, and amplitude settings. Multi-instrument synchronization and high level balanced output are also available.

A

task

at hand, that

HP

8904A

create complex signals. The waveforms available are: dc, sine wave, ramp (sawtooth), triangle,

and

description of the available options is given in paragraphs

is a Multifunction Frequency Synthesizer that produces six fundamental waveforms

one output. The addition of available options can provide: a second

is,

related documentation must be reviewed for familiarization with

installation, operation, performance testing, and adjustments, is found

1-6

and

signal

1-7.

output port,

8904A

1-2

reu.OlN0

V89

Model

1-4.

8904A

SPECIFICATIONS

General

Information

nble

HP

8904A SPECIFICATIONS

Specifications describe the instruments' warranted performance only unless noted) for automatic operation. Mathematically derived characteristics denote parameters which can be derived knowledge

plemental characteristics are intended to provide information useful in

applying the instrument by giving typical, but

parameters. These are noted

of

the digital generation methods used in the

as

'typical

",

from

not

'normal", or 'approximate".

1-1.

HP

8904A

(5oR

output

specifications and

HP

8904A.

Sup-

warranted performance

Frequency

Range: Sine wave: 0 Hz to

Square, triangle, ramp: 0 Hz to 50 Resolution: 0.1 Hz. Accuracy: Internal 10 MHz timebase:

External 10 MHz timebase: Same as accuracy and

stability

AC

amplitude (sine wave)

Range: 0 to Resolution:

Accuracy (amplitude

1'30, 0.1 HZ

3%,

Flatness (amplitude

+O.lYo

21.0%

105

3%

100

kHz to

(=0.009

(r0.09

into a

&its.

to

100

600

dB), 0.1 HZ

dB), 100 kHz to

600

kHz.

of

external timebase.

5052

load.

>40

mVpp into

kHz.

>630

into

to

100 kHz.

600

250

50Q):

kHz.

ppm.

Spectral Purity (sine wave)

THD+N

(including spurs, amplitude

-63

dBc

I~TLS

(0.07%),

-63

dBc

I~TLS

(0.07%), 7.5 kHz

-55

dBc

I~TLS

(0.18%),

20

HZ to 7.5 kHz,

to

20

kHz to

>50

mV

rms

30

kHz BW.

20

kHz,

80

kHz BW.

100

kHz, 750 ~HZ

into

BW.

5052):

Phase (sine wave)

Range: 0 to Resolution: Increment accuracy (Relative to

20.05O,

DC

Range: 0 to Resolution: Accuracy:

359.9O.

0.lo

0.1

Hz to 100 kHz.

amplitude

21OV

3%

digits.

520

mV or

or 0.001 radians.

open circuit.

r2.1%,

whichever

Oo

for

a fixed frequency):

is

greater.

Gaussian Noise

Spectral Characteristic: Equal energy per unit bandwidth

("white"). Amplitude range: 0 to Resolution:

3%

digits.

lo\,

into a

5052

load.'

Specifications

(1

of

4)

Supplemen ta 1 Characteristics

Number of channels:

four

with

Option

Standard waveforms:

Gaussian white noise.

AC

amplitude accuracy:

Typically: Square wave:

Triangle

Gaussian

Ramp:

Square wave risetime/falltime: Spurious (typically the higher of):

-50

dBc

or

500

Noise crest factor: Switching speed (via

One standard;

two

002.

Sine, square, triangle, ramp,

<3%

at

20

kHz.

:

<4%.

at

20

kHz.

noise:

<5%.

<7%

at

20

kHz.

Typically

pV,

100

kHz

to

600

kHz,

fypically

HP-IB):

>4.4.

Typically

with Option

<25

."

2

-70

dB

+

n

X

F

Typical

+0.1

i

LL

-0.1

Typical

I

-80dB

10Hz

Level

dB

100Hz lkHz

SSB

-70'

-80

-90

100Hz

Flatness

I

(I

kHz

phase noise at

1

Frequency

ref.)

10

Frequency

500

kHz.

kHz

at

I

kHz

5Vp-p

<2.5

20

ms.

into a

ps.

MHz

10

100kHz

002;

de,

and

BW.

kHz 100kHz

50R

load.

I

lMHz

1

Mathematically Derived Characteristics

Noise flatness (amplitude

20.5 dB, 0.1 Hz to 100 kHz.

2

1.0

dB. 100 kHz to

1

Noise

Voltage

/

fi

rev.OlNOV89

>lo0

600

kHz.

=

(Crest Factor)

%

(4.4)

x

mVp-p into

Peak Voltage

X

2

VPk

(2)

x

vmmi

5052):

X

d-h

2

\

V

%

-100

-110

-120

-130

-1401

1Hz 10Hz 100Hz lkHz 10kHz 100kHz

I

Offset Frequency

I I

I

1-3

General Information

Model

8904A

OPTION

(50Q

outputs only)

001

SPECIFICATIONS

Ziable

1-1.

HP

Modulation

Modulation for channel A ONLY, and specified for

sinewave carrier and modulation. Internal channels and D can be used to either collectively modulate channel A with one modulation type, or can provide simultaneous

modulation of channel A with any of the available modulation types. External modulation

is

NOT possible.

Amplitude Modulation (with Option

Rate:

0

Hz

to 600

kHz.

Depth range: Resolution:

Frequency Modulation (with Option

Rate:

0

Deviation range:

F,,

Resolution:

Phase Modulation (with Option

Rate:

0

Range:

Resolution:

Pulse or

Rate:

0

Summation (with Option

Two, three, or four channels may be summed into a single output. Two or three channels may be summed for modulation of channel A. All combinations able, EXCEPT FOR: { A+C and B+D ] or { A+D and B+C at the same time.

0%

to

100%

of carrier amplitude.

0.1%

of carrier amplitude.

Hz

to 600

kHz.

0

Hz

up to 600

+

Fdeviation

Hz

to 600

Oo

up to 179.9O/channel, however

DSBSC

Hz

to 50

0.1

0.lo

<=600

Hz

or 3% digits, whichever is less.

kHz.

or

0.001

Modulation (with Option

kHz

(up 600

kHz,

kHz.

radians.

kHz

001)

however

001)

for DSBSC).

of

channels are accept-

001)

B,

C,

001)

Channel-to-channel phase accuracy (equal amplitude, sine wave signals summed into one

0.1

Hz

to

100

kHz,

whichever is greater.

output):

+0.lo

or 30 ns

,

Mathematically Derived Characteristics

AM accuracy (the higher

setting, up to

1%

to 99% depth.

FM

accuracy (the higher

up to

20

Fcarrier +Fdeviation

4M

accuracy (the higher

to

20

kHz

20

kHz

modulation rate,

<=lo0

modulation rate, where:

DSBSC peak envelope accuracy:

up to

20

kHz

modulation rate.

Phase accuracy when channel A (sine wave):

0.1

Hz

to

100

kHz

of):

20.024%

kHz

modulation rate and

00:

20.1

20

Hz

kHz

AM or

or

20.20%

100

20.28%

deviahon, and where

kHz

of setting,

kHz.

of):

+0.lo

or 20.28% of setting,

Same as amplitude accuracy,

one

channel

20.15O or 30 ns, whichever is greater,

carrier frequency.

is

used

to

modulate

of

carrier,

up

8904A

Specifiatwns

(2

of

4)

Supplemental Characteristics

VOR

bearing accuracy:

AM

accuracy (at a

Typically

<t0.2%.

FM accuracy (at a

600

kHz

carrier):

Pulse modulation level accuracy:

Typically

1

kHz

rate and

1

kHz

rate,

Typically

<

=0.059

20

kHz

2

0.2%

Typically

600

kHz

carrier):

deviation, and

of setting.

5%

up to

pulse rate.

DSBSC

Intermodulation

carrier suppression:

(two

Typically:

<-70

<-60

Typically

>72

dB.

equal signal summed into one output):

dBc, for frequencies up to dBc, for frequencies

100

to

100

600

kHz.

kHz. Specifications for level accuracy, modulation accuracy, and spectral purity are all referenced to the peak of the composite signal less

3

dB. When signals are summed the specification for each individual signal is degraded by its amplitude relative to the peak

of

the composite signal.

FM

Stereo Mode (with Option

Test signal modes:

Right only.

Test tone frequency range: Composite signal level: Pilot tone level: Pilot tone level resolution: Pilot tone frequency range:

(default frequency 19

Pilot tone phase adjustment range: Subcarrier frequency range:

(default frequency 38

Preemphasis:

Left = Right, Left = -Right, Left only, and

20

Hz

up to

10

0%

to

100%

of composite level.

0.1%

0.1

kHz).

0.1

kHz).

25 psec, 50 psec, and 75 psec.

001)

to 15

kHz.

Vp-p

into 50Q.

of composite level.

Hz

to 600

kHz

0.0

to 359.9O

Hz

to 600

kHz

Supplemental Characteristics

FM stereo multiplex separation:

L-R:

typically

M-S:

typically

Multiplex subcarrier suppression:

]

.

Tone Sequence (with Option

Number

each with an individual on time and off time.

On-time duration: Off-time duration:

(Zero off time

Timing resolution: Timing accuracy: Sequence length

or HP-IB programmable.

DTMF

Number

A-D,

#,

Publication 48005.

On-time duration: Off-time duration:

(Zero off time AND zero on time not allowed)

Timing resolution: Timing accuracy: Sequence length

panel or HP-IB programmable.

>

65

dB, audio frequency

>

70

dB,

audio frequency

20

typically

001)

of

different frequencies:

0

ms,

0.80

0

ms,

0.80

zero on time not allowed)

0.01

ms

20.02

ms

750 tones, user definable from front panel

sequence (with Option

of

tone pairs:

*

).

Frequencies per Bell Technical Reference

16 standard DTMF tone pairs (0-9,

0

ms,

1.00

0

ms,

1.00

0.01

ms

2

1

ms.

750 DTMF tones, user definable from front

16

user definable tones

ms to 655.35 ms.

(10

ps).

(220

rs).

001)

to 655.35 ms.

(10

rs).

Hz to

>

70

dB

15

20

kHz

kHz.

1-4

rev.

01

NO

V89

Model

8904A

General Information

mble

Digital Sequence (with Option

User definable:

On level

Off level Sequence Sequence length: Up to Period duration: 0.10 ms to 655.35 ms. Period resolution: Period accuracy: Control modes (applies modes): Manual sequence (allows stepping through sequence),

single sequence, and continuously repeat sequence. Sequence can also be triggered by external TTL pulse.

Hop

Number of different States: 16 user definable states each with

an amplitude, frequency, and phase value.

Waveforms: Sine, square, ramp, triangle, dc, and white

Gaussian noise. Sequence entry: Binary, octal, or hexidecimal. Sequence

used), or up to 750 tones in hex mode (all 16 states used). Sequence clock frequency range: 0.1 Sequence clock frequency resolution: Sequence burst range: 1 repetition up to 127. Control modes: Manual sequence (allows stepping through

sequence), burst sequence

repeat sequence. Sequence can be triggered by external TTL

pulse.

OPTION

(5052

Output 1 to Output 2 phase accuracy (sine waves at the

same frequency):

whichever is greater.

(=lOV

open circuit),

(2

1OV

open circuit), and period.

entry:

Binary, octal, or hexidecimal.

3000

0.01

ms

20.02

ms

to

Ram

Sequence (with Option

length

up to

3000

002

SPECIFICATIONS

outputs only)

k0.lo

or

30

bits.

(10

ps).

(=

20

ps).

tone, DTMF

tones

(1

to

ns,

0.1

001)

and

in

binary mode

Hz

to

0.1

Hz.

127),

and continuously

Hz to

ZOO

1-1.

digital sequence

001)

(two

10

kHz.

kHz,

HP

states

Supplemental Characteristics

Output

OPTION

(5052

Direct addressing of channel A Up to 16 phase-frequency-

Digital modulation:

1

to

-100

-95

-90

Output 2 cross-talk

dB or

20

IJY-,,

0.1

dB or dB

ZOpV,,

OT

30

0.1

pq-,,

0.1

003

SPECIFICATIONS

Hz to

Hz

HZ

to

20

100

600

(the

kHz. kHz. kHz.

higher

OD:

Typically:

outputs only)

amplitude states of channel A may be preset and directly

addressed with four TTL-compatible inputs. Timing for fast

hopping must be provided by an EXTERNAL source.

By

appropriately setting the 16 direct control registers, the HP 8904A may be used as a digital modulator. Examples of signals which can be generated with this technique include FSK or multilevel levels), BPSK, QPSK, and QAM.

FM

(up to 16

8904A

Specifications

OPTION

(5052

outputs only)

Unit to unit phase accuracy: Additional 30 nsec error,

to

100

kHz. (Total phase error between units is then the

greater of

Maximum

low-loss power splitters (for a total of 16 phase related outputs if all units have Option

Recommended power splitters:

54

units synchronized: Mini-Circuits model ZSC-4-3 or

equivalent.

18

units synchronized: Mini-Circuits model ZFSC-8-1 or

equivalent.

(3

of

4)

005

SPECIFICATIONS

20.1

degree or 60 nsec,

number of synchronized units: 8 units using

0.1

002).

Hz to

100

Supplemental Characteristics

Unit

to unit phase accuracy: typically

error,

0.1

Hz

to

100

is then the greater of

OPTION

kHz. rota1 typical phase error between units

20.1

degree or

006

SPECIFICATIONS

(Sine wave only)

All specifications for the standard 50Q HP 8904A are degraded by the accuracy, flatness, and distortion specifications of the

Option 006, 600Q transformer coupled output. Because the transformer output was designed for passing sinewaves only, all specifications apply to that waveform. The Option 006 output will not pass digital sequences available with Option

001. In addition, phase accuracy is degraded and therefore not specified for Option 006.

Output type: fully floating/balanced transformer coupled output. Usable output frequency range: 30 Hz to

AC

amplitude (sine wave only)

Range: Open circuit: 0 to

600Q load: 0 to 15052 load: 0 to 4 Vrms.

50Q

load: 0 to 1.5 Vrms. Resolution: Accuracy (amplitude

6% (0.5 dB) 30 HZ to

12%

Flatness (amplitude

1

kHz

+

3%

digits.

(1.0

dB) 30 Hz to

reference):

0.15 dB,

0.15 dB, -0.75 dB, 30 HZ to

-0.15

20

Vrms.

10

Vrms.

>40

mVrms into a balanced 6000 load):

20

kHz.

100

kHz.

>40

mV rms into a balanced

dB, 30 HZ

to

Spectral Purity (sine wave only)

THD + N (including spurs, amplitude

10

Vrms into a balanced 600Q load):

-46 dB (0.50%), 30 Hz to 300 Hz, 30 kHz BW, amplitude

<

1

V,,

into a balanced 6000 load.

-60 dB

-63 dB (0.07%), 7.5 kHz to 20 kHz, 80 kHz

-55 dB

(O.lOYo),

(0.18%),

300 HZ to 7.5 kHz,

20 kHz to

100

<

15

nsec additional

30

nsec,

0.1

Hz

to

200

kHz.

20

kHz.

100

kHz.

140

mVrms to

30

kHz

BW.

kHz, 750 kHz'BW.

kHz.)

100

600Q

0.1

Hz

kHz.)

load,

Supplemental Characteristics

Switching Speed:

Via digital port: Typically Via HP-IB: Typically

Maximum switching rate

approximately

Maximum allowable

25

ns

for valid results.

reu.01

NOV89

400

kHz.

<8

ms.

(via

address

CIS,

<20

ps

for full filter settling.

digital control port):

skew

(via

digital port):

Supplemental Characteristics

Balance: Typically

Output Impedance: Nominally

Flatness (amplitude

1

kHz reference):

THD+N

balanced

(including spurs, amplitude

60OQ

<-50

dB

>40

+

load):

(0.32%),

dB,

>40

0.15

30

HZ

30

Hz to

mV rms

dB,

-4.0

to

300

50

60OQ

into

dB,

Hz,

kHz.

at 2 kHz.

a balanced

30

Hz

240

mVrms

30

kHZ

to

BW.

200

to

60012

kHz.

I

Vrms

1-5

load,

info

a

General Information

Model

8904A

lbble

1-1.

HP

General

Store recall: Output type: Maximum float voltage (signal+float):

from high or low side to chassis ground.

Zero-crossing outputs (available in Channel Config mode only):

output and polarity output are provided. The zero-crossing output pulses high for approximately 600 ns each time the channel phase

is high for phases of

These outputs do not reflect any user-specified phase offsets.

External timebase input:

of 0.1 to 5V peak, automatic switching.

Timebase output:

load. Output signal will be the internal timebase unless an external timebase input. When an external timebase is connected, it will be routed to the timebase output connector.

Temperature:

35 nonvolatile

Floating or grounded, HP-IB programmable.

1OV

peak maximum

For each channel, a TTL-compatible zero-crossing

goes

through

Oo

Output level

is

connected to the external timebase

Operating, O°C to 5OOC; Storage,

-2OOC

Oo

or MOO. The polarity output

to 180°, low for 180° to 360O.

10

MHz accepted at a nominal level

>O

dBm (0.3V peak) into a 50Q

to

70OC.

8904A

Specifications

Humidity range: Remote operation:

are remotely controllable.

HP-IB

compatibility:

PPI, DCl, DTO, CO.

Power:

Weight:

Dimensions:

HP

EM1

100/120V 220/240V

80

Net Shipping 13 kg ( 28.6 lb.).

System

Meets conducted and radiated interference of VDE 0871/

6.78 class B (radiated at 10 meters). Meets MIL 461B con-

ducted (CE03) and radiated (RE02) interference.

(4

of

4)

95% RH, O°C to 4OoC

HP-IB. All functions except the line switch

SHl, AH1, T6, TEO, L4, LEO, SR1, RL1,

(2

10%); 48-440

(&

10%); 48-66

VA maximum.

5.9

kg (12.8 lb.);

133 mm H X 213 mm (5.25 X 8.36 X 20.2 inches).

I1

size:

5%

H

X

1/z

MW X 20 D.

Supplemental Characteristics

Output impedance:

Typically

51K2

Hz.

HZ.

W

23%,

X

513 mm D

0.1

Hz

to

600

kHz.

1-6

Note:

of

end

Specifications

section 3.

(3A,

for

3B,

Option

005

3C,..ETC.)

and above are listed in the individual option supplements at the

rev.01

NOV89

Model

1-5.

8904A

General Information

OPTIONS

NOTE

Refer to pages 2 and 3 of table 1-1 for a complete listing of specijications for

the

electrical options.

Electrical and mechanical options are available and may have been ordered and received with the

1-6

and

1-7.

Multifunction Synthesizer. The options are listed in paragraphs

as

retrofitted to the instrument

follows:

These options may be

To add Option number

11816A

To add Option

001,

make arrangements with the nearest HP office to order HP part

and have the option installed.

002,

order HP part number

11817A.

The kit can be installed by the user

HP Service Center.

To add Option number

11818A

To change an instrument to Option

Conversions

Note:

section

Options

7

of the

To

add Option

005

HP

003,

make arrangements with the nearest HP office to order HP part

and have the option installed.

004,

refer to the

HP

section for the necessary part numbers and procedure.

and

006

may

only

be

retrofit on instruments with serial prefiz

8904A

Service

005

(multi-instrument phase synchronization), order HP part number

Manual

for more information.

from your local HP sales office. This option is not compatable with Option To add Option

office. This option replaces the standard

1-6.

MECHANICAL AND DOCUMENT OPTIONS AND ACCESSORIES

Rear-Panel Outputs : Option

004

(Option

can not be installed with either Option

006

(balanced output), order HP part number

500

output of Output

004.

The

RF

Output Connectors are located on the rear panel.

005,

Phase Synchronization,

Power Balanced Output.)

8904A

Service Manual’s section

11837A

1.

R948A

from your local HP sales

004.

or

Option

and

or

at an

7

Option

above. See

11827A

006,

High

Extra Operating and Sewice Manuals (1 each) : Option 910.

Manual and Service Manual are provided.

Add Sewice Manual : Option 915.

parts lists, component locators, troubleshooting aids, and schematic diagrams, to enable qualified

service personnel to repair an instrument. Information on retrofitting Options given.

Front Handle Kit.

5061-9689.

Bail Handle Kit.

Order HP part number

Rack Flange Kit.

the Multifunction Synthesizer in a rack with

spacing. One side of the instrument mounts directly to the rack, an offset panel encloses the other side of the opening. Order HP part number

For

Hewlett-Pacbrd products catalog.

rev.OlNOV89

An

additional Operation and Calibration

The HP

8904A

Service Manual provides the necessary procedures,

002

Ease of handling is increased with the front-panel handles. Order HP part number

The bail handle attaches to the front of the instrument to provide easy portability.

5061-9702.

This kit contains all necessary hardware and installation instructions for mounting

482.5

mm (standard 19-inch) by

5061-9657.

more information on available mounting hardware and cabinet options, refer to

133

and

004

mm

(5.25

the

latest available

is also

inch)

1-7

General Information

1-7.

ELECTRICAL OPTIONS

Model

8904A

Option

001:

Channel Configuration Mode Enhancements.

channels are added for destination of each channel are individually defined by the user to provide the maximum flexibility of the instrument. These additional channels provide the following functions:

Modulation

of modulation many complex waveforms. The allowable modulation types are: Band Suppressed Carrier), and pulse.

Channel Summation.

channels may be summed for modulation of channel

Tone Sequence Mode.

the on and off times of each tone can be adjusted.

Dual lone Multi kequency

signals tone can be user-defined.

Digital Sequence Mode.

events. Bit period and on/off levels can be user-defined.

of

Channel

at

comma@

the same time, or they can be summed prior

used in communications signaling can be output. Both the on and off times of each

a

total

of

4

channels. The frequency, phase, amplitude, waveform, and

A.

Channels

Two,

three, or four channels may be summed into a single output.

Sixteen user-defined frequencies can be programmed into sequences. Both

(DTMF)

Digital data strings can be used in sequences to provide a series of signaling

B,

C,

and D can be used

Sequence Mode.

Three additional

to

generate up to 3 independent forms

to

AM,

A.

The 16 standard Bell Telephone touch-tone

individually-addressable

modulating channel A to generate

FM,

@M,

DSBSC (Double Side

Two

internal

or three

Note:

Hop

RAM

Sequence Mode and

001

in Option

instruments with serial prefixes

these functions is provided in section

Hop

RAM

Sequence Mode.

Sequences of up to built using only Timing is provided internally for the sequences and

FM

Stereo Composite Generator.

receivers. The audio amplitude, pilot frequency, pilot phase, carrier frequency, and preemphasis are adjustable.

Option

002:

A

second internal channel and output port are added, allowing

operating signals.

003:

The

DIGITAL PORT

perform the following functions:

Hop Ram.

addressed. Timing for

Up to 16 phase, frequency, and amplitude states of channel A may be preset and directly

750

two

states.

test

on the rear panel of the instrument allows direct TTL- input of control data to

Up to

tones can be built using all 16 states. Sequences of up to

Sequences can be output from 1 to 127 times using a ‘burst’ function.

tone frequency, composite signal level, test signal mode, pilot

fast

hopping must be provided by an external source.

FM

Stereo Composite Generator functions are

2948A

and above. Detailed operating information for

3C.

16

different frequency, amplitude, and phase settings can be preset.

is

adjustable for precise baud rates.

A

flexible

FM

stereo encoder function is added for testing broadcast

two

independent, simultaneously-

only

3000

tones can be

on/off,

available

pilot

1-8

rev.OlNOV89

Model 8904A General Information

Digital Modulation.

used as a digital modulator. Examples of signals which can be generated with this technique include

or

FSK

Option

Up to eight instruments may be connected together to form a “master/slave” relationship between the instruments. One instrument provides the timing signals for the other seven. (If all eight instruments are equipped with Options 002 and have Options 001 and 005,32 internal channels can be synchronized.) Detailed operating information for

Option

A

6000 instead of the usual 50R. Maximum output level is increased to 20 or 10

HP

1-8.

HEWLETT-PACKARD INTERFACE BUS

multilevel FM (up

005:

this

function

006:

full-floating, balanced, transformer-coupled output is provided for Output

V

rms

into a 600R load. Detailed operating information for this function is provided in the

89044 Option

Appropriately setting the 16 direct control registers allows the instrument to be

to

is

provided in the

006

supplement in section 3B.

Compatibility

The Multifunction Synthesizer has an HP-IB interface and can be used with any HP-IB computing controller or computer for automatic system applications. The Multifunction Synthesizer is fully

HP

programmable via the HP-IB is defined by the following list of interface functions: SH1, AH1, T6, TEO, PP1, DC1, DTO, and CO. The Multifunction Synthesizer interfaces with the bus via open collector TTL circuitry. An explanation of the compatibility codes can be found in the IEEE Standard the identical ANSI Standard MC1.l.

Interface Bus. The Multifunction Synthesizer’s complete compatibility with

16 levels), BPSK, QPSK, and QAM.

005,

a

total

of 16 outputs can be synchronized. If eight instrument

HP

8904A Option

005

supplement in section 3A.

1.

Output impedance is

V

rms

into an open circuit,

L4,

LEO, SR1, RL1,

488

and

For more detailed information relating to programmable control of the Multifunction Synthesizer,

to

refer has been prepared entitled “Tutorial Description of the Hewlett-Packard Interface Bus” to provide a complete overview of the theory and operation of HP-IB. To receive this booklet, order HP part number 5952-0156.

Selecting the

The Multifunction Synthesizer’s HP-IB address is set by direct front-panel entry and is stored in nonvolatile memory. The instrument to any address desired from to paragraph 2-3

1-9.

ACCESSORIES SUPPLIED

The power cable and fuse supplied for the Multifunction Synthesizer are selected at the factory according to the Mains voltage available in the country of destination. For the part number and rating of the fuse refer to table 2-2. standard instrument; four adapters are shipped with

Remote Operation, Hewlett-Packard Interface Bus in section 3 of this manual. A booklet

HP-IB

,

refer to table 2-1. For the part numbers of the Power Cables and Mains Plugs available,

Address

is

00

to

30

PREPARATION

Two

BNC-to-Banana Plug adapters (HP

delivered with address 26 already set, but may be easily changed

(decimal). For information on changing the HP-IB address, refer

FOR

USE, HP-IB

Address Selection.

Part

1250-2164) are shipped with each

an

Option 002 instrument.

rev.01

NOV89

1-9

General Information Model 8904A

1-10.

1-1

RECOMMENDED TEST EQUIPMENT

Table Multifunction Synthesizer. The Critical Specifications column describes the essential requirements for each piece of test equipment. Other equipment can be substituted if it meets critical specifications.

1.

DOCUMENTATION UPDATING

Serial Numbers

Attached to the instrument The that is unique to each instrument. The contents of these manuals apply directly to instruments having the same serial number prefix(es) as listed under SERIAL NUMBERS on the respective manual title pages.

For packets, contact your nearest Hewlett-Packard office.

An instrument manufactured after the printing of these manuals may have a serial number prefix that is not listed shown on the title page indicates that the instrument the manual. In this case, your manual is provided with updating information to make possible. This updating information includes any hardware or software changes that have occurred as well as corrections to the documentation.

2-1

lists the

first

four digits and the letter are the serial prefix. The last five digits form the sequential suffix

information concerning a serial number prefix not listed on the title page

test

equipment required for performance testing, adjusting, and servicing the

is

a serial number plate. The serial number is in the form 1234A00123.

on

the manual title page. Having a serial number prefix that

is

slightly different from those documented in

or

exceeds these

or

in the Manual Update

is

greater than that

it

as

current

as

A

Description

A

Manual

your manual

of

the Manual Update Packet

Update

packet consists of replacement and addition pages which should be incorporated in

to

bring it up to date.

Signing Up for the Documentation Update Service

Hewlett-Packard offers a Documentation Update Service that will provide you with further updates and changes as they become available. If you have not received update information that matches the serial number of your instrument, you can receive this information through the Update Service.

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For

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99220

more information, refer

1-10

rev.OlNOV89

Model

8904A

General Information

Instrument

Type

Audio

Analyzer

~~ ~~~

Audio Spectrum Analyzer

Digital Multimeter

Frequency Counter

nble

Fundamental Frequency Range: 20 Hz to 100 kHz Distortion Range: -70 dB Distortion Accuracy: Low-Pass Filters: 30 and 80 kHz

~

Frequency Range: 100 to 5000 Hz

5

0

vims

60

to

fl%

Input Level: Display Range:

DC Range: 0 to 50V DC Accuracy: &0.2%, AC Range: AC Accuracy: Ohms Range: 0 to Ohms Accuracy:

Frequency Range: 10 MHz Absolute Accuracy:

f2

dB

lOOV

1

kR

f0.2%

f5

1-2.

Recommended Test Equipment

Critical

dB

1

ppm

Specifications

to 15 Vdc;

f2

mV, 10 to 1000 mVdc

(1

of

2)

Suggested

Model

HP 89038

-7-

,

HP 3561A HP 3580A

HP 3478A

HP 5314A

or

I

1

P

P,

A

P

Network

Analyzer

Oscilloscope

Synthesized Signal Generator

'P=Performance

Analyzer Frequency Range: 0 to 5 MHz Display Range: 80 dB Source Frequency Range: Input and Output Impedance: 500

3 dB Bandwidth: 1 MHz Sensitivity: Input Triggering: External and Internal

Two Channels;

Frequency Range: 1 kHz to 1 MHz Output Level: 1 Vrms Output Impedance: Variable Phase Range: 360 deg Variable Phase Resolution:

Tests;

5

mV per division

Impedance:

A

A=Adjustments

1 MR

vs. B Display

50Q

and

0

0.1

to

50R

5

MHz

deg

HP 3577A

HP 1740A Tektronix 2235

HP 3325A

Option 001

or

A

rev.01

NOV89

1-11

General

Information

Instrument

Type

Thermal Converter

Multifunction Synthesizer**

lhble

1-2.

Critical

~~ ~

Level Range: Frequency Range: Flatness: Input Impedance:

~~~ ~

All

specifications must match the HP

f

0.03O/0

1V

20

50R

Hz to

600

Recommended

Specifications

kHz

8904A

Opt

Test

Equipment

005.

(2

of

2)

I

HP

Labs

HP

Option

Suggested

Model

11 050A

1395A-1

0904A

005

or

Model

89MA

Power

Splitter**

(2

required)

*P=Perfotmance

**Used

only

Four way Impedance: Path Frequency Range:

Tests; A=Adjustments

to

test

HP 8904A

Loss:

50

1

R

dB

Option

>50

005.

Mini-Circuits

zsc4-3

MHz

1-12

rev.

01

NOV89

Model

8904A

Installation

2-1.

2-2.

INTRODUCTION

This section provides the information needed to install the HP Included selection, power cables, HP-lB address selection, interconnection, mating connectors, operating environment, instrument mounting, storage, and shipment.

INITIAL INSPECTION

Inspect the shipping container for damage.

damaged, and the instrument has been checked mechanically and electrically. Procedures for checking electrical performance are given in Section defect Packard office. If the shipping container notify the carrier as well as the Hewlett-Packard office. Keep the shipping materials for the carrier’s inspection.

or

Section

2

INSTALLATION

is

infomation pertinent

8904A

to

initial inspection, power requirements, line voltage and fuse

Multifunction Synthesizer.

-1

To

avoid hazardous electrical shock, do not peTform electrical tests when there are any signs of shipping damage to any portion of the outer enclosure (covers and panels).

If

the shipping container

it

should be kept until the contents

4.

If

the contents are incomplete,

if

the instrument does not pass the electrical performance test, notify the nearest Hewlett-

is

of

the shipment have been checked

damaged,

or

the cushioning material shows

if

there

or

cushioning

is

mechanical damage or

material

for

completeness

signs

of

stress,

is

2-3.

PREPARATION FOR USE

The Multifunction Synthesizer requires a power source 220

to

24OVac

of

100

to 12OVac

(zt

10%)

at

48

to

66

Hz. Power consumption

I

This is a Safety Class I product @e., provided with a protective earth terminal). the Mains power source to the product input wiring terminals, power cord,

or

supplied power cord set. Whenever been impaired, the instrument against any unintended operation.

If this instrument voltage reduction, make sure that the common terminal earthed pole

An

uninterruptible safety earth ground must be provided from

must

be made inoperative and be secured

is

to be energized via an external autotransformer for

of

the power source.

it

I

is

80

likely

VA

that

(f

10%)

at

48 to

maximum.

the protection has

is

connected to the

440

Hz,

or

2-1

Installation

Model 89048

Line Voltage Selection and

BEFORE

be sure the correct voltage

A rear-panel switch permits operation 220

to

240Vac when used in the 230V position. The number visible on the switch indicates which

range of line voltage

matched

fuse.

One fuse

operation. The fuse is installed

selection switch is set according specified, the selection

to

the power

is

supplied

Forprotection against fire hazard, the line fuse should only be a with the correct current rating.

PLUGGING THIS INSTRUMENT into

to

supply

source.

with

each instrument.

in

the instrument

switch

Table

Fuse

Table 2-1

will

Replacement

the

Mains (line) voltage,

has

been selected

from

100

to 120Vac when used in the

to

the instrument. Verify that the line voltage selection switch

lists

the ratings and the

It

has the proper rating for

at

the time of shipment. The position of the line voltage

to

the line voltage specified by the customer.

be set according

2-1.

Line Fuse Rating and

to

the

HP

country of

HP

Part Number

part number for the replaceable

destination.

115V

100,

250V

position,

120, 220,

If

the voltage is not

fuse

or

240Vac

from

is

Power Cables

BEFORE CONNECTING

of

terminal of

the

a

socket outlet provided with a protective earth contact. The protective action must not be negated without two-conductor outlet is not sufficient protection.

This instrument is equipped with a three-wire power cable. When connected power receptacle,

with each instrument depends on the country of destination. Refer of the power cables and

this

the instrument

(Mains) power cord. The Mains plug shall only be inserted in

a

protective conductor (grounding). Grounding one conductor of a

cable grounds the instrument cabinet. The type of power cable plug shipped

Mains

plugs available.

THIS

must

by

INSTRUMENT, the protective earth

be connected to the protective conductor

the

use

of

an extension cord (power cable)

to

Table

to

an

appropriate

2-2

for the part numbers

ac

2-2

rev.

01

JULSI

~

Model

8904A

Plug

Type

DO

Fl

250V

8

\I

6

125V

A

1

oov

(Same

plug

as above)

250V

@y+

E

250V

Table

Cable

HP Part

Number

81 20-1 351 81 20-1 703

81 20-1 369 81 20-0696

81 20-1 689 81 20-1 692

81 20-1 378 81 20-1 521

81 20-1 751

81 20-4753

81 20-4754 81 20-21 04

81 20-2296 81 20-3997

81 20-0698

2-2.

Power

D

4

9oo/900

0

STR/STR

4

NZSS198/ASC112” 80

STR/90°

7

STR/STR’

2 STR/90°

Cable and

Plug

Description

Mains

I--

p

6 STR/90°

3 STR/90° 90 3 STR/STR SEVl 01

1959-24507

Type 12

4 STR/90°

1

Plug

Part

Cable

Length

(inches)

90

79

-

79 79

79

Numbers

Cable

Color

Mint Gray Mint Gray

Jade Gray Jade Gray

Jade Gray

~~

Dark Gray I Japan only

Black United States,

I

In Country

United Kingdom, Cyprus, Nigeria, Rhodesia, Singapore

New Zealand

East and West Europe, Saudi Arabia, Egypt, (unpolarized in

many nations)

United States, Canada, Mexico, Phillipines, Taiwan

U.S./Canada

Switzerland

Installation

For

Use

8

00

250V

81 20-2956 81 20-2957 81 20-3997

0

81 20-421 81 20-4600

6

81 20-1 860

8120-1575

fi

81 20-21 91 81 20-4379

I”

4 STR/STR

1

(Systems Cabinet Use)

0

STR/STR

8 STR/90° 59 8 90°/900 80

Black

Gray

JadeGray

Jade Gray Jade Gray Jade Gray

I

South Africa, India

I

2-3

Installation Model

8904A

HP-lB

Address Selection

The Multifunction Synthesizer is both a listener and a talker.

can

be

used,

however, address 21 should not normally be used since

reserved for the internal controller.

allowed address set

The entry. To read current address and allow the entry new address and pushing the

to

HP-II3

be stored in the instrument. The instrument

to

26.

address

can

or

change the

only

be

changed while the instrument

HP-IB

ENTER

HP-IB

address, key-in

of

key.

addresses greater than

a

new address. Enter a new HP-IB address by keying-in the

interconnection

Interconnection data for the Hewlett-Packard Interface

Mating Connectors

Coaxial Connectors.

50-ohm

be

Interface Connector.

screws are metric.

BNC

male connectors that are compatible with those specified in

Coaxial

HP-IB mating connector is shown in Figure 2-1. Note that the

mating connectors used with the Multifunction Synthesizer should

will

SHIFT

Bus

Any

address

30

normally be delivered with the

is

on,

and by

ADRS.

is

The front panel

provided

from

00

to

it

is

the address normally

are invalid and

using

direct front panel

will

in

Figure 2-1.

US

MIL-C-39012.

two

30

(decimal)

will

not

be

HP-IB

display the

securing

DIGITAL

Corresponding mating connector is HP part 1251-0221

functions for the port

PORT

Connector.

only

operate on instruments equipped with Option

This is a 15 circuit, 15 pin, type

or

Operating Environment

The operating environment should be within the following limitations:

Temperature

Humidity

Altitude..

............................................................................

.......................................................................

...................................................................

Bench Operation

The instrument cabinet has plastic feet and a foldaway

to

(The plastic feet are shaped stand raises the front of the Multifunction Synthesizer for easier viewing

Rack

Mounting

Rack mounting information is provided with the rack mounting kits. the Multifunction Synthesizer as an option, office.

ensure self-alignment

it

may be ordered through the nearest Hewlett-Packard

tilt

stand for convenience in bench operation.

of

instruments when they

"D"

subminiature connector.

TRW part DAM15P. (The Hop Ram

003

-

Hop

Ram).

.O"

C

to

+

50"

C

<

.<

4570

of

the front panel.

If a kit

was not ordered with

95% relative

meters

are

stacked.) The tilt

at

(15,000

40"

feet)

C

2-4

rev.

OIJULSI

Model 8904A

Installation

2-4.

STORAGE

Environment

Packaging

AND

The

instrum

Limitations apply

Temperature Humidity Altitude..

Original Packaging.

available through Hewlett-Packard offices. for servicing, attach

full

and

correspondence, refer

Other

cially

serial num ber.

Packaging.

available materials.

a.

Wrap the instrument in heavy paper

service center, attach a tag indicating the type of service required, return address, model

number, and full serial number.)

SHIPMENT

ent should be stored in a clean,

to

both

storage

and

shipment.

dry

environment. The following environmental

..........................................................................

.......................................................................

..................................................................

Containers and materials identical

If

the instrument is being returned

a

tag indicating the

Also,

mark

to

the instrument by model number and

The following general

type

of

service required, retum address, model number,

the container

instructions

or

plastic.

FRAGILE

to

should

(If

shipping

those used

to

assure careful handling.

full

serial number.

be

used

-20'

C

<

95% relative

c

15

300

meters

in

factory packaging are

to

Hewlett-Packard

for

repackaging with commer-

to

a Hewlett-Packard office or

to

+

at

(50,000

In

75'

40'

feet)

any

c

C

b. Use a strong shipping container. A double-wall carton made

is adequate.

c.

Use enough shock-absorbing material sides

of

the instrument

Protect the front-panel with cardboard.

d. Seal the shipping container securely.

e. Mark the shipping container

to

provide

FRAGILE

a

(75

to

100

millimeter layer; 3 to 4 inches) around

fjrm

cushion and

to

assure careful handling.

to

prevent movement in the container.

of

2.4

MPa

(350

psi) test material

all

rev.

01

JUL91

2-5

Installation

SHOULD

NEAR

OF

TWISTED

BE

TERMINATION

OTHER

GROUNDED

WIRE

OF

PAIR

P/O

WSTEO

P/O

TWISTED

P/O

TWISTED

P/O

TWISTED

P/O

TWISTED

P/O

TWISTED

PAIR

WITH

WITH WITH WITH

REN

DIO

Dl0

DIO DIO

11

10

9

8

7

6

8

7

6

5

SHIELD

ATN

SRO

IFC

NDAC

NRFD

DAV

EO1

DIO

4

Dl0

3

DIO

2

DIO

1

-CONNECT

EARTH

GROUND

TO

Model

8904A

ISOMETRIC THREAD

M3.5 X 0.6

Logic Levels

The Hewlett-Packard Interface Bus logic levels are and the false

(0)

state

is

2.5 Vdc to

+5

Vdc.

Programming and Output Data Format

Refer to Section 3 “Operation”.

Mating Connector

HP 1251-0293; Amphenol57-30240

Mating Cables Available

HP 10833A, HP 10833C

meter (3.3

4

meters (13.2

ft.),

HP 108338 2 meters (6.6 ft.)

ft.),

HP

108330,

0.5

meters (1.6 ft.)

1

Cabling Restrictions

24-PIN

(SERIES

TTL

compatible, that is, the true (1) state

MICRO-RIBBON

57)

CONNECTOR

is

0.0

Vdc to f0.4 Vdc

2-6

1.

A Hewlett-Packard Interface Bus system may contain no more than 2 meters (6.6

ft.)

of connecting cable per

instrument.

2.

The maximum accumlative length of connecting cable for any Hewlett-Packard Interface Bus system

ft.).

(65.6

Figure

2-1.

Hewlett-Packard Interface

Bus

Connections

is

rev.

20

meter

15MA

Y89

Model

8904A

Operation

3-1.

Section

3

OPERATION

INTRODUCTION

This section provides reference information for operating the HP

or

by manual generates signals, and what you must know in order to create the signal you need.

‘Button-by-button’ and tutorial operating instructions for options

the HP

Note:

8904A

Option

above. Detailed operating and

Operating information for options The capabilities and specifications for the various options, HP-Il3 operation and codes, and other

reference information is given under the following headings:

Instrument Block Diagram

8904A.

HP

remote control. Information is given that helps you understand how the HP

Operation and Application

001

capabilities have been expanded for instruments with serial prefix

HP-1B

-

provides an overview of the main functional blocks that comprise the

guide.

information for these functions is provided in section

005

and

006

is provided in sections

8904A

001,

002,

3A

Multifunction Synthesizer

and

003

are provided in

2948A

and 3B.

8904A

and

3C.

How to Create and Output a Signal

the instrument and the control sequences used to create and output

Instrument Functions and Operating Considerations

considerations for a standard HP

Digital

as fast hopping Option

Remote Operation

Programming examples are given to illustrate the usage of some of the codes listed for each option.

Status Byte

help you further understand and apply the information.

Error Codes and Help Messages

Special Functions

Operating Technical Reference

to operating the HP

Menu Map

keystrokes are used to access each of the menus. This fold-out page is designed to be viewed as you refer to the other material that is listed earlier in the section, letting you see relationship between the menus and the related operations.

Port

-

identifies the connections for this port and describes how it is used for operations such

003

equipped instruments.

-

lists the

-

discusses the purpose and use of the Status Byte. Programming examples are given to

-

describes the special functions in the HP

8904A.

-

illustrates the organization of the various menus used in the HP

-

illustrates how the different signal controls are implemented in

a

signal.

-

describes the capabilities and operating

8904A

HP-IB

-

provides detailed technical descriptions for a variety of topics related

and the various options.

codes and capabilities implemented in the

-

lists the various error codes and their meanings.

8904A

and how to program them.

HP

8904A.

8904A

a

‘before and after’

and what

rev.01

NOV89

3-1

Operation

3-2.

BLOCK

DIAGRAM

Model

8904A

The block diagram below capabilities of your instrument are dependant upon the options you have ordered. By understanding how the different options integrate with the rest almost any signal you need.

For more information on the capabilities and operation of standard and optional instrument functions, refer

to

the detailed information following

are included in the

HP

illustrates

8904A

the main functional blocks

of

the instrument, you can quickly learn

later

in

Section

Multifunction Synthesizer

that

comprise the

3.

Step-by-step operations for each option

Basic Operation and Application

II II

II

HP

8904A.

guide.

I

to

The

create

-

Figure

3-1.

HP

8904A

finctional

1

Blocks

3-2

Model 8904A Operation

Functional Block Descriptions

CPU:

the associated ROM and RAM memories needed

The Central Processing Unit consists of the microprocessor, Numeric Synthesis IC, and

to

store the instruments operating system and configuration settings. Interfacing between the HP-JB, Digital Port, and keyboard inputs here.

Recall/Save Registers:

for

later

retrieval. A battery backup

power

is

disconnected from the instrument.

Hop

RAM

Registers:

003

Option

Digital Port:

equipped instruments.

The Digital Port connector on the rear panel

address selection and timing of the Hop RAM settings.

timing signal. The usage of this connector

This

003.

All

of the front panel controls.

is

the connector for the IEEE-488 compatible Hewlett-Packard Interface

using Option

Keyboard:

HP-IB:

for the Line switch, remotely over this control bus. Refer for more information regarding the use

This

all

functions

This

is

a special section of RAM that

is

provided

is

the area of RAM where the

that

can be selected using the front panel controls can be selected

to

the

of

this connection. Example programs for using the HP-IB are

so

is

discussed

Remote

that the information in this memory

later

Control

is

used

to

store instrument settings

16

Hop RAM settings are stored for

of

the HP 8904A

Fast

hopping in Section

is

achieved by using an external

3,

along with more details on

information described later

is

used primarily for

also provided.

is

performed

is

not lost

Bus.

Except

in

Section

if

3

Standard Single Channel:

instrument (channel

Option

(Refer

001

:

Three more channels are added. You may

to

the

Modulation of channel

A).

Option

001

A

Sequencing of Tone, DTMF (Dual Tone Multi Frequency), and Digital

Option

002:

A

second channel (channel

This block contains the one standard channel included with every

You can control the Frequency, Phase, Amplitude, and Waveform of the signal.

sum

channels together in various combinations.

Specifications

is

provided using one or more of the other channels

listed in Section 1 for more information on summation.)

as

a

modulating source.

signals

B)

and a second instrument output port are added. The

is

provided.

channels operate independent of each other; however, the phase relationship between the can be varied by adjusting either channel.

Option

Amplitude, and Phase can selection for accomplishing the hopping

003:

This feature provides the ability

all

be hopped simultaneously

is

input

to

hop between

or

independently. The timing signal and address

via

the Digital Port. (See

16

different channel A setups. Frequency,

Digital Port

discussed earlier

in this section.)

two

signals

3-3

Operation Model 8904A

3-3.

HOW

TO

CREATE AND OUTPUT A SIGNAL

Each channel available in your HP 8904A is set up. You must specify any signal parameters you need before you can output the desired signal. from the Main Selection Level.

You can then store the instrument settings you have specified by using the SAVE and RECALL keys to

access the storage registers.

Most of the signal parameters can be entered in any order. (Destination, Frequency, Phase, Amplitude; Destination, Amplitude, Frequency, Phase.. etc.) However, you should

(DESTN) before specifying the Amplitude (AMPTD); since the Amplitude setting

zero

(0)

when the Destination

change the amplitude for that channel until it is turned back On.

Parameter

IFREQI

Im]

-1

IAMPTD]

(frequency)

(destination) ch

(destination) ch B,C,D

(amplitude)

+

AC

is

changed. If you turn the Destination

Value(

20

(0,

A

1,2,

1,2, AM,

DSB,

20

(9,

to

default values each time the instrument

to change

To

enter the Channel Configuration Mode, press the

Ezample)

1.8,

24

or

OFF

FM, 4M,

PULSE,

2.18,

*

...)

OFF

.Ol...)

in

the Channel Configuration Mode

always

Off

for any channel, you can not

Terminat

Hz,

kHz

(none)

set the Destination

is

or

is

powered

fl

always set

key

to

f

1-1

-1

ml

1-1

pmq

For

step-by-step operation examples, refer to the HP 8904A Multifunction Synthesizer

and Application

(amplitude) DC

(amplitude)

Modulating ch

(phase)

(float)

(filter)

(output)

guide.

ch

B,C,D

A.

(waveform) (none)

Use the appropriate Terminator for each modulation type.

(-1.1,

20

>O

1

or

1

or 2

1

or

(

I,

(0,

1.8,

2

-9,

94,

9.07

.07...

.6...)

...

)

rad, deg

'L,

+,

ON

or

OFF

Low Overshoot or Sharp Cutoff

ON

or

OFF

E\I,

'L,

NOISE,

Basic Operation

=

3-4

Model

8904A

Operation

c

L

1

Figure

3-2.

HP 8904A

Signal

Control

finctions

3-5

Operation Model 8904A

3-4.

INSTRUMENT FUNCTIONS AND OPERATING CONSIDERATIONS

The following paragraphs briefly explain how a signal instrument configurations and options, and

case.

Abbreviated specifications are also included for quick reference. (A detailed list of

is

provided in Section

1.)

Detailed operating examples are given in the

and

Application

guide.

an

HP

is

generated, the features included with different

overview of special operating considerations for each

8904A Multifunction Synthesizer

Standard Instrument: Creating a Simple Signal From Digital Data

PHASE

ADJUST DATA

FREO DATA

-

P

0

C-D

CLOCK MULITIPLIER

I-

>

0

P

*-Is-x-

WAVEFORM AMPLITUDE

TABLE DATA DATA

4 4

AHPL I TUDE

DI GITAL ~~~~~~Ly

all

specifications

Basic Operation

I

\

DAC

FILTER CONTROL

SAMPLER SAMPLER AUDIO DESTINATION

ATTEN

ANALOG CONVERSION AND CONDITIONING

Figure

3-3.

Creating A Simple Signal

CONTROL

(

ON/OFF

1

)

ROAT I NG

OUTPUT VOLTAGE

ATTEN

2

OVER

/

(ON/OFFI

OUTPUT

1

CONTROL

3-6

Model

8904A

How

the

HP

8904A

Generates

a

Signal

Operation

Waveforms are generated digital waveform synthesis integrated circuit (DWSIC). For each channel, the DWSIC generates a continuous stream of numbers which represent instantaneous levels of the waveform. These digital values are then converted for each output port).

The analog signal

The conditioning circuits include a sample-and-hold quantization noise (smooth the transitions between samples from the maximum output, and attenuators

For more detailed information on how the Multifunction Synthesizer

is

Operating Considerations:

Amplitude Resolution

The amplitude resolution of the

and

can be specified in smaller increments than what

Because of this method of adjustment, the amplitude resolution varies between output voltage levels.

to

the

Refer if

you need more information regarding very fine amplitude adjustments.

Floating Output

Operating Technical Reference: Amplitude Resolution

by

a numerical synthesis technique. The heart of the synthesizer is a single

to

an analog signal by a digital-to-analog converter or

conditioned by conventional analog circuitry and routed

to

increase the outputs dynamic range.

Service Manual.

All

Instruments

HP

8904A

remove

HP

8904A

is

provided by a combination of digital and analog controls

is

displayed on the front panel of the instrument.

DAC

switching noise, filters

DAC),

creates signals, refer

information included later in Section

DAC

(one converter

to

the output connector.

amplifiers

to

the

to

remove

boost the

HP

8904A

3

The

HP

8904A

chassis ground of the instrument. This is why there

You

may

also prefer a ‘normal’ chassis referenced ground for

HIGH

connector for the ground reference.

The

FLOAT

powers up in the ‘floating ground’ mode. amplitude for a signal, and there appears have specified the correct ground reference for your application.

Waveform Jitter

Due to the digital conversion process used waveform can be present when using a ramp, square, or triangle waveform. This type of distortion is referred The highbow transition period appears to have causes this affect, refer to the later in Section

to

is designed

control allows you

as

‘jitter’. This affect can be seen by displaying a

3.

to

allow the user

to

select the type of signal reference you require. The instrument always

Operating Technical Reference: Waveform Jitter

to

have a floating ground

is

If

you have specified the correct output destination and

to

be no signal present on the output, check

to

create the different waveforms in the

a

second offset trace. For more information on what

a

LOW

that

is independent of the

and

HIGH

connection for each output.

your

application, using the shield

HP

48

kHz

square wave on an oscilloscope.

information included

to

see that you

8904A,

of

a

partial

the

3-7

Operation Model 8904A

Abbreviated Channel A Specifications

Abbreviated specifications are listed here

for

all

specifications

instrument options are listed in Section

to

provide general operating guidelines. Complete detailed

1.

3-8

Model 8904A Operation

Option

001

-

Operating Tutorial

0

HP

Contains detailed operating instructions for Instruments with serial prefix 2948A and above have additional functions available with Option

Waveform Examples

0

HP 8904A Multifunction Synthesizer examples settings used to obtain those signals.

DIGITAL

Three More Channels, Summation, Modulation, and Sequencing

8904A Multifunction Synthesizer

001

that are documented in section 3C.

of

several types

WAVEFORM SYNTHESIS

of

waveforms that can be created with Option 001 and the instrument

-1

Operation and Application

-

most of the capabilities provided by Option

Waveform Catalogue

ANALOG CONVERSION

r-

AND

guide

(HP

part 5953-8494): Contains

CONDITIONING

part 5953-8491):

1

CHANNEL A

fRCo

F,LTERS

-0

PHASE

I

AM.

FM.W

DSE.

PULSE

D/A

z

ATTEN- AMPLI-

001.

CHANNEL

CHANNEL D

lab

B

fRm PHASE

Addition

of

These additional channels are generated using the same technique that provides channel Frequency, Phase, Amplitude, Waveform, and Destination of each channel can be individually controlled to produce

-m

PHASE

Channels

AMP

Figure

6,

a

3-4.

HP

C,

and

8904A

D

Option

001

Operation

combination of modulated and summed signals.

A.

The

reu.01

NOV89

3-9

Operation Model

Summation

8904A

You can sum channels together to produce a composite modulation signal for modulating channel you could use channels B and C to modulate channel channel

Modulation

You can use one be modulated.) Multiple channels can be summed together to provide composite modulation signals; such

as

Summation

External modulation is not provided.

Sequencing

Sequencing allows you to output a sequence of Tone, DTMF (Dual Tone Multi Frequency), or Digital signals. Each capabilities. Sequencing can be set to

Tone Sequencing

You can adjust the order of the tones Time of each tone can be individually set.

DTMF Sequencing

communications. Sixteen different DTMF signals are available for creating tones. You can adjust the order of the tones to appear in any sequence. The On Time and each tone can be individually set.

two,

three, or four channels together

A

signal. (Refer to

or

more of the three additional channels to modulate channel

those used for FM Stereo broadcasts or VOR Navigation. (Refer

for additional information on summing modulating signals.)

of

the individual signals in a sequence can be defined

-

You can specify up

-

Operating Considerations: Summation

run

continuously, or one sequence

to

16

individual tones; creating a sequence of up to

to

appear in any sequence. The Frequency, On Time, and Off

The DTMF signals are the same

into

a single output. You can

A,

and then

sum

channel D with the modulated

for additional information.)

to

provide very exacting signaling

at

as

those used for tone-type telephone

sum

two

or three

A.

For instance,

A.

(Only channel A can

to

Operating Considerations:

a

time using manual control.

750

tones.

a

sequence of up to

Off

time of

750

Digital Sequencing

output. The Sequence Base, Period, On Level, and

bits values may be specified.

Hop

RAM Sequencing

sequence modes. Sixteen and phase value. Sequences of up to are used. Sequences

FA4 Stereo

receivers. All of the associated FM stereo signal parameters are adjustable for maximum flexibility.

-

Operating Considerations: Option

Summation

Summation may be done using many combinations of signal output and modulation schemes. All combinations of channel summation are

[A+D and B+C] at the same time. (You may not sum you can sum and output non-adjacent channel D.

Abbreviated Specifications: Option

Abbreviated specifications are listed here to provide general operating guidelines. Complete detailed specifications for options are provided in supplements at the end of this section.

-

Digital sequencing allows you

-

Hop

RAM

sequencing offers a combination of the capabilities of tone and digital

signal

states can be preset, each with an associated amplitude, frequency,

750

tones can be output if all sixteen output states (Hexadecimal)

of

up to

3000

tones can be output

The FM Stereo composite generator mode,allows the user to

to

specify a series of digital on/off values to be

Off

Level are adjustable. Sequences of up to

if

only

two

output

001

acceptable, EXCEPT FOR [A+C and B+D] or

two

sets of non-adjacent channels.) However,

two

adjacent channels, such

as

B+C, and

modulate

001

to

003

are listed in Section

1.

Specifications for Option

states

(Binary) are used.

test

FM broadcast stereo

channel A with the

005

3000

and above

3-10

rev.OlNOV89

Model

8904A

Operation

Modulation of channel A only; using a sinewave carrier

Modulation

AM

FM

QIM

Pulse

DSBSC

Rate Range Resolution

0

Hz to 600 kHz

0

Hz to 600 kHz

0

Hz to

600

kHz

0

Hz to

50

kHz (N/A) (N/A)

0 Hz to 600 kHz OVTOlOV

1%

of carrier amplitude

0 Hz to 600 kHz

OOup to

per channel

and

modulating

to 100% 0.1%

179.9'

signal.

of carrier amplitude

0.1 Hz or whichever is less

0.1

34

Oor 0.001 radians

3f

digits

digits,

rev.

01

NOV89

Sequence

I

Type

Tone

DTMF

Digital

Hop RAM

Signal

Format

Single Frequency 16 different user-

Tones defined frequencies

Dual Tone 16 standard DTMF

Multi Frequency tone pairs (0-9,A-D,#,')

Binary, Octal or 16

Hexadecimal codes: (1 000 bits)

Output Serially

Single Freq. Tones 16 (0-F Hex)

Hexadecimal, Octal, (3000 bits)

or Binary Codes

Number

of

Different Maximum

Signals Sequence Length

250

tones

250

tones

(0-F

Hex)

250

Cbit words

750

Cbit words

3-1

1

Operation Model 8904A

Option

Operating Considerations: Option

002

-

A

Second Channel and Output

NOTE

The following description pertains to instruments with Option Addition and output.)

Channel B and Output 2 Are Added

The second channel and output added by Option standard single channel and output included with

The Frequency, Amplitude, Phase, and Waveform of channel B are controlled separately from channel A,

to

allowing you also independently controlled. The phase relationship between the

and can be altered by adjusting the Phase

output

of

Option

two

001

provides more flexibility for wing the second channel

completely different signals

of

002

are identical in function and operation to the

all

instruments.

at

once. The Outputs for the

either channel.

two

channels

002

only.

two

channels are

is

precisely controlled

002

Destination Control

Option designated for Output

002

does not

allow

1;

Channel

you

to

change the Destination of the

B

is

always designated for Output

two

channels. Channel

2.

(See note above.)

A

is

always

Abbreviated Specifications: Option

The specifications for channel B are identical

Output 1 to Output 2 phase accuracy (sine waves at the same frequency):

k0.1"

or

30

ns,

0.1

Hz

to

100

002

kHz,

to

those of channel A listed in Section

whichever

is

greater.

1.

3-12

Model

8904A

Operation

Option

003

Operating Tutorial

0

HP

Contains detailed operating instructions

of

HOP RAM

ADRS

HOP RAM

ADRS

HOP RAM

ADRS

-

Frequency, Amplitude, and Phase Hopping

8904A

Multifunction Synthesizer

Operation and Application

for

accessing the

the parameters to be hopped.

-

0

FREO

-

AMPTD PHASE

.

I

1

I

2

FREO

-

AMPTD

-

PHASE

HOP RAM

ADDRESS

I

-

AMPTO.-

FRONT PANEL HOP ADRS SELECTION

RAM ADRS SELECTION

PHASE

SELECT

ON

HOP

CHANNEL

4

CONF I GURAT I ON

J

HP-IB HOP RAM

guide (HP part

Ram

menu and specifying all

A

koUTPUT

.

5953-8491):

’

DIGITAL PORT HOP RAM ADRS

SELECTION FOR

FAST HOPPING

~~

Figure

How Hopping

Option and store them you want

003

0

Direct front panel selection

0

Remote selection using the

0

Setting a binary address on the Digital Port Hop Register connections

3-5.

HP

8904A

is

Performed

allows you to define

in

the Hop

to

output

by

selecting the appropriate Hop

Ram

Option

16

section

003:

Hopping Between

16

different channel A frequency, phase, and amplitude configurations,

of

memory. You can then tell the HP

Ram

Address using any

HP-IB

connector

Channel A Settings

8904A

which configuration

of

three methods:

3-13

Operation Model 8904A

A

detailed example of using direct front panel controls

Multifunction Synthesizer

examples and

HP-IB code lists

Operation and Application

to

allow you

to

perform hopping guide. This tutorial

perform hopping

is

provided in the HP 8904A

by

remote control.

also

has

programming

The use of the Digital Port

to

perform hopping

information.

Operating Considerations: Option

0

Only channel

0

If your HP 8904A it

is

being modulated

hopped when

q5M

is

selected.

0

Hop

Mode can

by Option

A's

AM

not

001.

parameters can be hopped.

is

equipped with four channels (Option

or

summed with other

or

DSB

modulation

be used

in

conjunction with any of the three Signal Sequence Modes provided

Abbreviated Specifications: Option

Supplemental Characteristics

Switching Speed

Via

digital pork Typically

Via

HP-IB:

'ljpically

<8

<

ms.

8ps,

003

<

20ps

is

discussed later in Section

Ool),

channel A can be hopped while

signals

is

selected; and the phase setting cannot be hopped when

for

full

except

filter

that

settling.

the amplitude setting cannot be

3

in

the

Digital Port

Mazimum sun'tching rate (via digital control port):

Approximately 400

Mazimum allowable address skew (via digital port):

25

ns for valid results.

kHz.

3-14

Model

3-5.

8904A

DIGITAL PORT

General Information

Operation

The Digital Port on the back of your

If

various signaling needs.

Ram

Hop

(For

addresses

more information on hopping, refer

Trigger Trigger

out

(Seq.

~ ~

your instrument

to

fast

hop frequency, phase, and amplitude settings.

Ch.C Ch.B

Polarity Polarity

In

Mode)

Figure

\o

Address

3-6.

HP

8904A

is

to

Hop

allows external and internal signals

equipped with Option

the previous information in this section on Option

1

2

3,

v

Register

(High

True)

003,

ChA

Gnd

this port allows you

Digital Port Connections

to

be used for

to

select

003.)

Connector Functions

Zero

Crossing

These are

your

its

instrument.

point in zero crossing occurs.

These outputs are available with in

These outputs are only valid in the Channel Configuration mode.

Outputs

TTL

signals

waveform

Changing the Phase setting

that

identify when the associated channel's waveform

(0'

and

180').

This output pulses high for approximately

all

instrument configurations; regardless

NOTE

of

the signal to be output alters the phase

relationship between the signal and its corresponding zero crossing signal.

Zero crossings are only exactly aligned with the signal being output when

the Phase

is

set to

0'.

is

crossing the 0 volt

600

ns each time the

of

what options are present

3-15

Operation Model

8904A

Polarity

Outputs

These TTL signals identify the polarity of the associated channel's waveform. The output

0"

to

180",

phases of

and low for

These outputs are available with all instrument configurations; regardless

180"

to

360".

of

what options are present

in your instrument.

NOTE

Changing the Phase setting

of

the signal to be output alters

the

phase

relationship between the signal and its corresponding polarity signal.

Polarity signal transitions are only exactly aligned with the signal being

output when the Phase

is

set to

0".

These outputs are used in the Channel Configuration mode only.

Circuit Gnd

This

is

the same as chassis ground.

Hop

Register Address

These four connections are used phase, and amplitude (Option

Once you have accessed the Hop Menu and set the desired Hop can output the signal

for

each address by turning the Digital Port

address on these connections.

A

channel

configuration

is

003

As

output.

to

specify Hop

only).

each Hop

Ram

address

for

fast

hopping channel

Ram

parameters

ON,

and then setting the appropriate

is

set on these pins, the corresponding

for

A's

each address, you

is

high for

frequency,

There is a delay between the time the address

is

at the instrument's output. This delay

400

be changed is about

A

schematic showing an example

the HP

8904A

Multifunction Synthesizer

kHz (every

of

The timing diagram below illustrates the address on the Hop Register Address

THE HOP

CHANGED

THE SIGNAL FOR THE FIRST ADDRESS

RAM

ADDRESSES ARE

ON

ADDRESS PINS, THEN..

THE HOP REGISTER

typically

2.5

,us).

a circuit used

Operation and Application

fast

hopping the signal at the maximum rate of

pins

.

is

set on the Digital

<8

ps.

The maximum rate that new addresses can

to

fast

hop

every

2.5

ps).

Port

and the time the signal appears

is

provided in the

guide.

Option

400

kHz (changing

009

section

of

3-16

Figure

3-7.

Fast

Hop

Timing Diagram

Model

8904A

Trigger In

This Option

signal

001.

is

used

to

It

duplicates the

initiate a single DTMF', Tone,

fl

Single

function

to

or

Digital sequence

start

a

sequence.

Operation

for

instruments equipped with

You can demonstrate this function by setting up a sequence and then connecting pins 9 and

is

to trigger the sequence. The sequence this pin.

Trigger

This pin

Out

is

not used with any

of

the current options and does not provide a useable output

re-triggered each time a high-to-low transition

14

together

is

applied

at

this time.

to

3-17

Operation Model 8904A

3-6.

REMOTE

OPERATION

General Information

The Hewlett-Packard Interface Bus (HP-IB)

used for controlling up

data

lines and 8 interface and communication management lines. A description of the HP-IB connector

is provided

at

the end of Section 2 of this manual.

to

15

different instruments at one time.

is

an IEEE-488 compatible

The HP 8904A Multifunction Synthesizer can be remotely controlled

that

function and reading or setting the

The HP-IB address

Tutorial

0

Tutorial Description

can be done with the front panel keys; with the exception of turning line power on or

HP-IB

is

read and changed by using the

of

address.

ADRS

the Hewlett-Packard Interface

very helpful guide explains the capabilities and specifications for understanding and using HP-IB control. Hardware setup, interface circuitry, and programming are discussed in detail.

to

both the experienced

and

inexperienced user.

Programming Considerations

0

HP-IB programs examples in

0

This manual

examples

is

not intended

that

follow assume

apply the information given

this

manual are written in HP BASIC language.

to

teach BASIC language programming. The tables and programming

that

you have enough programming experience

in

them.

digital

It

uses

common

via

the HP-IB

key. Valid addresses

Bus

(HP part number

remote control system

TTL

level

signals

to

perform any

for

off

are

00

to

30.

5952-0156)

It

to

understand and

This

is

written

8

0

Some parameters must be specified before others; such signal before setting before attempting

0

The front panel display only changes

parameters remotely. The different parameters being altered.

its

amplitude, and entering the proper mode for the type of signal you need

to

set any signal parameters in

To

be able

to

view the parameter changes during HP-IB operation,

to

show

what

that

as

specifying the correct destination for a

that

mode.

mode the instrument

can be changed are not shown

manually select the menu that shows the parameters you want HP-IB commands.

to

is

in when changing

look

at before sending the

as

they are

you

must

3-18

Model

8904A

HP-16 Compatibility

Operation

The following codes denote the various remote control abilities built into the HP ‘not bar’ over them indicate abilities that are not available in the HP-IB tutorial for more information on the meaning of these codes.)

SH1

-

Source Handshake:

AH1

-

Acceptor Handshake:

T6

-

Talker: Basic Talker, Serial

TEO

-

Extended Talker: Basic Talker, Serial Poll, Talk Only Mode, Unaddress

L4

-

Listener: Basic Listener, Listen Only Mode, Unaddressed

LEO

-

Extended Listener: Basic Listener, Listen Only Mode, Unaddressed

SR1

-

Service Request:

RL1

-

Remote Local. complete capability.

PP1

-

Parallel Poll: remote configuration.

DC1

-

Device Clear: full capability.

full

capability.

Capability.

full

capability.

Poll,

Talk

Only Mode, Unaddress

in

this instrument. (Refer

if

MLA.

if

MTA.

if

8904A.

if

MLA.

MTA.

Codes with the

to

the

Glossary

DTO

-

Device Trigger: no capability.

CO

-

Controller: no capability.

HP-I8 Code

The following pages contain listings of the HP-IB programming codes for the HP

are arranged in four tables. The first table (Table

that are standard to all HP

are unique to each of the Configuration Options

after each table to demonstrate the use of the codes.

Note:The HP-IB code listings and programming examples

in the individual option supplements at the end

Listings

for

the HP

8904A

3-5)

configurations. Tables

(001,

of

this chapter.

contains the HP-IB codes for the functions

3-5

002

through

and

for

3-7

003).

A

options after Option

8904A.

contain the commands that

sample program is presented

The codes

003

are provided

rev.OlNOV89

3-19

Operation

Model

8904A

Function

Amplitude

Backlight

Beep

Exit

Filter

lbble

HP-IE

Code

AP

BO BF

BP

EM

FS

SH

LO

AU

3-4.

HP-IB

Form:

Example:

Set amplitude

Backlight On Backlight Off

Beep

Form:

Exit Mode. Exit Mode needs no data.(Returns instrument to Main Selection Level) .

Form:

Example:

Output Board Filter Select. Designate Output Port 1 (or 2 with Option 02) followed

Eliptic (Sharp Cutoff) Gaussian (Low Overshoot) Auto (Automatic)

Codes for the Standard

AP<Channel><Amplitude Value><Terminator>

“APA1 VL“

of

a channel. Valid terminators for amplitude are VL, MV and UV

EM

FS<Output Number><Filter>

“FS1 AU”

by

(no space) the desired filter.

HP

8904A

Description

finctions

(1

of

5)

~

if

the instrument is equipped

Float Control

Frequency

FC

FR

Form: FC<Output Number><ON or OF>

Example:

Float Output On/Off Control. Designate Output with Option

Form: Example:

Set frequency of channel. Valid terminators for frequency are HZ and

“FC1 ON”

Port

1

02)

followed by (no space) the desired state.

FR<Channel><Frequency Value><Terminator>

“FRAPOKZ”

(or 2

if

the instrument is equipped

KZ.

3-20

Model

8904A

Table

3-4.

HP-IB

Codes

for

the Standard

HP

8904A

Functions

(2

of

Operation

5)

Function

Go To Mode

Increment Set

HP-IB

Code

GM

HP

ID

IS

Description

Form:

GM <Mode Number>

Example:

Go to Mode.

This function will return a three digit ASCII string representing the Error Number

255

where 0 means no error reported). Refer to Appendix B for the list of Help

Messages.

Read the ID message. A read

controller in the following format:

~~ ~

Form:

Example:

Increment set. Used

commands.

"GM4"

Go

to Mode accepts the values 0-9.

0

=

Channel Configuration Mode.

1

=

(Reserved for future options.)

2 = Tone Sequence Mode.

3

=

DTMF Sequence Mode.

4

=

Digital Sequence Mode.

5-9

=

(Reserved for future options.)

of

the ID string sends 80 characters to the requesting

"HP8904A Opts "Firmware Revision XXXXXa Serial

"APAISlVL"

01

/02/03"

for

any parameter that can be modified by the Up and Down

No

XXXXX"

(000

to

UP

DN

I

Off

Output Control

OF

ON

00

L

Increment Down

Examples:

UP and DN can be used for settings which have an associated increment set value. The) can be prefixed by a specific function, or used by themselves to modify the presently active function.

Use like the

<

Use like the

>

Off

On

Form: Example:

Output On/Off Control. Designate Output Port 1 (or 2 Option

"PHAUP, 'UPDNDN", "DN"

~~~

LAST

key to access the previous display.

02)

followed by (no space) the desired state.

key to access the next display.

or

"001

OF

OF>

if

the instrument is equipped with

3-21

Operation

Model

8904A

Function

Phase

Phase Reset

Preset

Query Data

lhble

HP-18

Code

PH

PR

PS

?

3-4.

HP-IB

Form:

Example:

Set phase

Phase reset establishes a common zero phase reference for the channels.

Instrument Preset

Example:

Query

Codes

for

the

Standard

PH<Channel><Phase Value><Terminator>

'PHA45DG"

of

a channel.

Form

FRx? APX?

APX? Ah? APX? APX? APX? APX?

Valid

terminators

Output 726;"FRAT

Enter 726;Freq_a_value$

ASCII

Data

0000000.0

00.000000

+00.000000

-00.000000

0000000.0

00000000

HP

8904A

Description

are

DG

finctions

and

RD.

implied

HZ

Volts Volts volts

Percent

Hz

Degrees

Units

(3

of

5)

Destination

NiA

Out14 Dsb Outl-4, (DC) Outl-4, (DC)

Am

Fm

Phase

Mod

Pulse

Mod

PHx?

WFx?

DEX?

Where "x"

Return Value Waveform

is

the

channel number A-D.

00001 Sine 00002 Ramp

00003 Triangle 00004

00005

00006 Square

Dc

Noise

oo00.0

00000

Degrees

See

Return Value

See

Return Value

Return

00007 00008 00009

0001

0001 1 0001

0001

0001 6

Value

0

2

3

N/A

NiA

Destination

Am

Fm

Phase

Mod

Dsb

Pulse

Mod

Out1

out2

Off

3-22

rev.OlNOV89

Model

8904A

Operation

Function

Recall

~ ~

Reverse Power

Save

Service Requesi

Special

Functions

ltcble

HP-IB

Code

RC

RP

sv

~-

RM

SM

SF

8-4.

HP-IB Codes

Form:

RCcRegister>

Example:

Recall. Valid data values for Recall are 0-1 1.

~~ ~

Reset reverse power protection.

Form:

Example:

Save. Valid data values

~~

Form:

Read Service Request Mask. The present value 000-1

Form:

Examples:

Set Serv*ke Request Mask. Valid data

Fom\:

Examples: 'SF4",

Set or Reset Special Functions. The value of the Special Function flag

can

be read at any time but composite any previously set flags value.

Example:

"SF6"

'RC11"

SV<Register>

'SVl

RM

91. SM<Data Value>

SF<Data Value>

of

To

activate

Special1 value = 2

Special2 value

for

the

Standard HP

"

for

Save are 0-1

~ ~ ~ ~

'SM128", 'SMO"

'SF1

7"

can

only

bit

flags. A Special Function operation configures

are

lost). Do not leave a space between the mnemonic and the data

Special

Functions 1 and

=

4

6

8904A

Description

1.

=

0-255

be set at the Main Selection Level.

hnctwns

of

the SRQ mask in ASCII is returned,

2,

the command would be:

(4

all

of

5)

The flag is a

16 bits of the flag (that is,

reu.01

NOV89

RSF

Form:

RSF

Read Special Function Value. The returned value is the decimal representation of a 16 bit binary number indicating the Special Function(s) that are active. Value range 00000 to 65535 in

ASCII

is returned.

Special Flag

Special

Function

(....additional specials not yet implemented

Example:

weight of 1 and Special 4 is 16 giving the result

Bit

Assignments:

Operation

0

1 Disable Automatic Phase Reset 2 Disable Beeper 3 Reverse Modulating Waveforms

4

5

Last State Recalled On Power Up

Disable Output Blanking Floating Outputs On Power UP

...

..

....)

If Specials 0 and 4 are active, RSF will return a value of

of

17.

Bit Pattern

xxxx xxxx

xxxx

xxxx xxxx

xxxx

17.

Special 0 is a

Bit

16

xxxx

xxxx xxxx

xxxx

XXXl

Weight

8421

XXXl

XXlX

x1xx lXXX

xxxx

bit

3-23

Operation

Function

lbble

HP-IB

Code

3-4.

-

HP-IB

Codes

___~

for

the

Standard

HP

8904A

Description

finctwns

(5

Model

of

5)

8904A

Terminators

Time Base

Waveform

Kz

HZ

DG

RD

VL

MV

uv

ET

sc

MS

YO

PC

EO

WF

Kilohertz Hertz

Degrees

Radians Volts Millivolts Microvolts Enter Seconds Milliseconds Percent Percent

Example:

Read External Reference Status. This function allows you to determine whether the Time Base reference is external a

000

Form:

Example:

Set

waveform of a channel. Valid data values for waveform are:

"EO"

or

internal.

is

returned.

WF<Channel> < Waveform>

"WFATR"

SI = Sine

RA

=

Ramp

TR =Triangle

SQ

=

Square

NS

=

Noise

DC

=

dc.

If

the External reference is on, a 001 is returned,

if

not

3-24

10 20 30 40 50 60 70 73

80 90

100

110 120 130 140

I

tt**t*ttttt****lt*******~***************n********n

!

HP SERIES 200/300 BASIC language

!

'

programming example for the

!

*

standard HP 8904A MULTIFUNCTION

!

*

SYNTHESIZER.

,

.................................................

!

OUTPUT 726;"PS" OUTPUT 726;"GMO" OUTPUT 726;"FCl OUTPUT 726;"FRAlOOO.l

OUTPUT 726;"APA1.25VL" OUTPUT 726;"PHAgODG" OUTPUT 726;"WFARA" END

OF"

Figure

HZ"

3-8.

Sample

!

Preset HP 8904A.

!

Goto channel configuration mode.

!

Turn output 1 float off.

!

Set channel A frequency to 1000.1 Hz.

!

Set channel A amplitude to 1.25

!

Set channel A phase to

!

Set channel A waveform to ramp.

Program

for

Configuring Channel

90

degrees.

V.

A

rev.OlNOV89

Model

8904A

llable

3-5.

I I

HP-IB

1

Code

HP-IB Codes

I

-

Four

Channel Operation

Form:

DE<Channel> <Destination>

Examples:

Set destination (OC2

if

the instrument is equipped with Option

That

Can

Be

Used

With

Option

Description

001

Instruments

(1

of

2)l

-

'DEAOC1

of

",

channel. Valid data values for destination are AM, FM, PM, DS, PU, OC1

"DWM"

02)

and OF.

Operation

Modulation

~ Amplitude ~

Digital Sequence Base

Off

Time

On Time

AM

FM PM DS PU

7

STOF

STON

Amplitude Modulation, valid AM terminators are Frequency Modulation, valid fm terminators are Phase Modulation, valid PM terminators are DG or RD. DSB Modulation, valid DSB terminators are VL, MV, and UV. Pulse Modulation

~ ~~ ~

-

Signal Sequence Modes

Form:

APH<Amplitude Value> <Terminator>

Example:

Enter Tone or DTMF amplitude. Amplitude terminators are VL, MV and UV.

Digital Sequence On Level

Digital

Sequence

Form:

DAPH<Amplitude> <Terminator>

Examples:

Digital Sequence Mode amplitude terminators are VL, MV and UV.

~~

Select Binary Base Select Octal Base Select Hexadecimal Base

Form:

STOFcTime Value> <Terminator>

Example:

Set

Off

Time (lone

~~ ~

Form:

STON<Time Value> <Terminator>

Example:

Set On Time (Tone and DTMF Sequence). Valid terminators are MS and SC.

-

"APH1.999VL"

Off

Level

"DAPH4VL", 'DAPL-1 VL"

"STOF.5Sc"

and

DTMF Sequence). Valid terminators are MS and SC.

"STON9.3MS"

'10

or PC.

KZ or HZ.

Period

Option

the Hop

rev.01

001

capabilities have

RAM

NOV89

SBP

sequence and

Form:

SBP<Time Value> <Terminator>

Example:

Set Period (Digital Sequence Only). Valid terminators are MS and SC.

*n expanded in instruments with serial prefix 294819 and above. Refer to section 3 for information concerning

1

Stereo

I

"SBP9.3MS"

functions.

3-25

Operation

Model

8904A

Function

Register Number

Run Mode

Sequence End

Zbble

HP-IB

Code

1

3-5.

HRA

RUNC

RUNM

RUNS STOP

SEQE

HP-IB

Form:

Examples:

Enter Tone

Run Continuously Run Manually Run Single Stop Run

Form:

Example:

Set Sequence End. Valid terminator

Form:

Example:

Set Sequence Index. Valid terminator is ET.

Form:

Examples:

Write sequence string. Entry string is terminated with

Codes

That

Can

Be

Used

With

Option

Description

HRA4 or 2 Digit Address>ET

'HRA2ET" "HRA15ET"

or

DTMF register. Addresses

SEQE<Sequence End Value>ET

'SEQE115ET"

SEQP<lndex Value>ET

'SEQP37ET"

WSQ<Data String><Terminator>

Tone Sequence = 'WSQO1123456789ABCDEF;" DTMF Sequence Digital Sequence Binary Base Digital Sequence Octal Base = WSQ0123456701234567;" Digital Sequence Hex Base

the etx character. Maximum string length = 250 characters.

=

0-15

is

ET.

WSQO123456789ABCDW:

=

001

are

valid,

"WSQO1 01 01

WSQOl23456789ABCDEF;"

Instruments

Valid terminator is

01

;

,

cr/lf, EO1 or

(2

01

;-

of

2)

"ET"

Tone Frequency

FRH

Form:

FRH<Frequency Value><Terminator>

Example:

Enter tone frequency (Tone Sequence Mode only). Valid terminators are HZ and

'FRH723.5HZ"

KZ.

3-26

reu.OlNOV89

Model

10 20 30 40

50

60 70 80 90 100 110 120 130 140 150 160 170 180

190 200 21 220 230 240 250 260 270 280 290 300 31 320 330

8904A

I

..................................................................

!

HP SERIES 200/300 BASIC language

!

programming example for the

!

* HP 8904A MULTIFUNCTION SYNTHESIZER

!

OPTION 001: fm stereo composite.

!*

,

..................................................................

I

OUTPUT 726;"PS GMO"

OUTPUT 726;"DEAOCl FRA39KZ APAlVL PHA270DG WFASI"

OUTPUT 726;"DEBOCl FRB37KZ APBlVL PHB9ODG WFBSI"

0

OUTPUT 726;"DEBOCl FRC19KZ APC lOOMV WFCSI"

OUTPUT 726;"DEDOCl FRD1 KZ APD2VL WFDSI"

0

END

(left channel only)

Operation

*

!

Preset and

!

configuration mode. ! !

Set channel A to

!

Destination = Output

!

Freq = 39 kHz, Amplitude ! 1 volt, Phase = 270 degrees !

Waveform = Sine.

I

i

Set channel B to

!

Destination = Output !

Freq = 37 kHz, Amplitude ! 1 volt, Phase = 90 degrees, !

Waveform = Sine.

!

Set channel C

!

Destination = Output 1,

!

Freq = 19 kHz, Amplitude !

0.1 volt, Waveform = Sine. ! !

Set channel D to

!

Destination = Output

!

Freq

!

2 volts, Waveform = Sine.

=

1

kHz,

go

to channel

to

Amplitude

1,

=

1,

=

1,

=

10 20 30 40

50

60 70

80

90

100

110

120

130

140

150

160

170

180 200

201

21 0 300

Figure

1

..................................................................

!

* HP SERIES 200/300 BASIC language

!

*

programming example for the

!

HP 8904A MULTIFUNCTION SYNTHESIZER

!

OPTION 001 : digital sequence.

1

..................................................................

! OUTPUT 726;"PS GM4

OUTPUT 726;"BSB SBP0.5MS DAPH5VL DAPLO.2VL"

OUTPUT 726:"SEQPl ET WSQOOOl 001 101 1 1 ; SEQE12ET"

OUTPUT 726;"RUNC END

3-9.

Sample Program

for

Configuring Channels

t

A,

B,

C

and

D

!

Preset and go to digital

!

sequence mode.

1

!

Set sequence base to

!

Binary, sequence period

!

0.5

ms, on level

!

and

off

level = 0.2 volt.

! !

Set sequence pointer

!

write sequence

!

"0001 001 101 11

!

sequence end = 12.

!

Run sequence continuously.

=

5

=

",

and set

volts,

=

1,

Figure

3-1

0.

Sample Program

for

Configuring a Digital Sequence String

3-27

Operation

Model

8904A

Function

Destination

10

20 30 40

50

60 70 80

90

100

110

120 130 140 150 160

1

70

180

190

200

HP-IB

Code

DE

Form:

DE<Channel><Destination>

Examples:

'DEAOF" 'DEBOC2"

Set destination. Valid data values for destination are

'Must

also have Opt.001 with these

1

*T*TT.TTtt*tT*TtTTT**T*TT*T*T*TTTTTTTTTT*TT**T~T*TTT***~T*T~**T***

!

HP

SERIES 200/300 BASIC

!

* programming example for the

!

*

HP

8904A MULTIFUNCTION SYNTHESIZER

!

OPTION 002.

1

TTTT~~T~TT~~TT~T~TT~~T**~T~TT~TT~TTTT~TTT~TT~~*TT~~UT~T*~TTTT~*~T~

!

OUTPUT 726;"PS"

OUT 726;"GMO" OUTPUT 726;"FRMKZ APA2VL PHA45DG WFASQ"

OUTPUT 726;"FRB2KZ APB2VL PHB9ODG WFBSQ"

END

language

Description

two

commands.

T

7

OC1*, OC2'

!

Preset

!

Goto

!

Set channel A frequency

! !

2

kHz,

!

45

degrees, and waveform = square.

! !

Set channel B frequency

!

2

kHz,

!

90

degrees, and waveform = square.

!

and

OF.

HP

8904A.

channel configuration mode.

amplitude = volts, phase

amplitude

=

2 volts, phase

=

Figure

3-11.

Sample Program

for

Configuring

Output

Ports 1 and

2

3-28

rev.01

JUL91

Model

8904A

Zbble

3-7.

HP-IB

Codes That Can

Be

Used with Option

003

Instruments

Operation

Function

Amplitude

On/Off

Digital Port

Frequency

HOP On/Off

Hop Register

Phase

HP-I6

1

Code

DPE

FRH

FHR

H RA

PHH

Description

Form:

APH<Amplitude Value><Terminator>

Example:

Enter Hop Mode amplitude parameter. Valid terminators are VL, MV and UV.

Form:

Example:

Amplitude Hop On/Off Control.

Form:

Example:

Digital Port On/Off .Control.

Form:

Example:

Enter Hop Mode frequency parameter. Valid terminators are HZ and

Form: Example:

Frequency

~~

Form: Example:

Enter Hop Register address. Addresses

Form:

Example:

Enter Hop Mode phase. Valid terminators are DG and

“APH2.123VL”

AHWON or OF>

“AHROF

DPE<ON or OF>

”DPEOF“

FRH<Frequency Value><Terminator>

“FRH723.5HZ”

FHR<ON or OF>

“FHROF

Hop

On/Off Control.

HRAd or 2 Digit AddresoET

“HRASET”

0-15

PHHCPhase Value><Terminator>

“PHH59.3DG”

KZ.

are valid, valid terminator is ET.

RD.

__

~

HOP On/Off

Query Port Status

PHR

QRE

Form:

PHR<ON or OF>

Example:

Phase Hop On/Off Control.

Form:

Example:

The Port Status value is the sum of four states.

Port Status

DPE value: On=16 Off=O FHR value: PHR value: On=4 Off=O AHR value: On=2 Off=O

“P H R 0 F

QRE

“QRE“

=

Bit Weight

DPE value + FHR value + PHR value + AHR value.

On=8

Off=O

3-29

Operation

10 20 30

40

50

60 70 80 90

1

00 110 120 130 140

150

160 170 1 80 190

200 21

0

220 230

240 250 260 270 280 290 300 31

0

320

330

340

350

360 370 380 390 400 41

0

420 430

,

..

***.t**..*..**.********.tt.**

!

HP SERIES 200/300 BASIC language

!

programming example for the

!

HP 8904A MULTIFUNCTION SYNTHESIZER

!

OPTION 003: fast hop.

,

..................................................................

!

OUTPUT 726;"PS GMO"

OUTPUT 726;"HRAOET FRH500HZ APHlVL"

OUTPUT 726;"HRAl

OUTPUT 726;"HRA2ET FRHl SKZ APH3VL"

OUTPUT 726;"HRA3ET FRH2KZ APH4VL"

OUTPUT 726;"HRA4ET FRH2.5KZ APH5VL"

OUTPUT 726;"HRA5ET FRH3KZ APH6VL"

OUTPUT 726;"FHRON AHRON"

FOR I=1 TO 100

FOR

J=O

TO 5

OUT 726;"HRA",J,"ET"

NEXTJ

END

ET

APH2VL"

*

..

Model

!

Preset and go to channel

!

configuration mode.

! !

Set Hop Ram address

!

Hop Freq

!

Amplitude = 1 volt.

! !

Set Hop Ram address = 1,

!

Hop Freq = 1 kHz, Hop

!

Amplitude = 2 volts.

! !

Set Hop Ram address = 2,

!

Hop Freq

!

Amplitude

!

Set Hop Ram address = 3,

!

Hop Freq = 2 kHz, Hop

!

Amplitude = 4 volts.

!

Set Hop Ram address = 4,

!

Hop Freq = 2.5 kHz, Hop

!

Amplitude

1

!

Set Hop Ram address

!

Hop Freq = 3 kHz, Hop

!

Amplitude = 6 volts.

! !

Turn frequency hop

!

and turn amplitude hop

!

Repeat

!

Step from add=0 TO add=5.

!

Hop to next address.

=

500

=

1.5

=

3

volts.

=

5

volts.

hop

seq 100 times.

=

Hz, Hop

kHz, Hop

=

on,

on.

8904A

0,

5,

3-30

Figure

3-12.

Sample Program

for

Hop

Mode Operation

Model

3-7.

8904A

STATUS

BYTE

General Information

The Status

to

indicate specific problems or instrument conditions that

is

used

to

The operator can use the Status is dependant on the status

Byte

provides information concerning instrument conditions. Seven of the 8 bits are used

alert the controller regarding these conditions.

Byte

nzble

during

of

the instrument.

3-8.

HP

8904A

HP-IB

control

Status Byte Definitions

can

occur

during operation. The other bit

to

perform a user defined operation

Operation

that

Bit

Weight

#

128

64

32

16

8

4

2

1

(Not Used)

RQS

Reserved for future use. Reverse Power Triggered.

Signalling Sequence Stopped

Signalling Sequence Started

Timebase Out of

Invalid

Using the Status Byte

Each of the 8 bits has

to

indicate when a bit has been set

and

write

to

the Service Mask.

Condition

This

bit

bit signals the controller that an interrupt has beer

generated

by

Reverse Power Protection Circuit has been triggered. Indicates that a

ended. (Used with Opt Indicates that a

HP-I6

Lock

Command

started.

The

assembly

An

(Used

reference oscillator loop on the digital (A2)

is

out of

invalid code has been received on the

error has been made

an

equivalent numeric weighting associated with

to

a ‘high’ condition.

It

is

this weighting that

Description

one or more of the other status bits.

DTMF,

with Opt

Tone, or Digital sequence has

001

only).

Tone, or Digital sequence has

001

only).

lock.

bus,

in

programming the instrument.

it.

This numeric value

is

used

to

or an

is

read from

used

Service

Mask

The Service Mask determines what bits in the Status

(SRQ).

you

Service Mask

It “masks” the interrupts that you don’t want

do

want active. You

to

change the settings for your needs.

can

both read the Service Mask

Byte

to

are used

be active,

to

initiate a service request interrupt

and

enables the interrupt(s)

view the current settings, and write to the

that

3-31

Operation Model

Reading the Service Mask

8904A

To read the current Service Mask setting, simply use the HP-IB command value.

A

simple program for reading the Service Mask

10

20

30

40

Setting the Service Mask

To

set the Service

command

OUTPUT

ENTER

PRINT ”SERVICE END

726;”RM”

726;A$

Mask

SM

along with the weighted value. For example,

MASK

to define the

VALUE=”;A$

SRQ

generating condition you want active, use the HP-IB

is

as

follows:

if

you wanted

RM

to

set the Service Mask

only allow an interrupt if a reverse power condition occurs, you would output the command:

OUTPUT

Error

Isolation

Any time an interrupt brief description of the error, or use the HP-IB command

Codes

726;”SM16

occurs

is

provided in this section

you can press the

to

help you isolate any hardware, software,

HELP

key on the front of the

HP

to

HP

read the error number. A list of Error

or

occur.

return the weighted

to

8904A

to

display

a

operation faults that

If

you are writing a program that responds for your controller and then perform this value

to

interpret the condition

of

you want.

The following programming example information.

to

a

serial poll

the

HP

is

given

an

SRQ condition, you must

to

return the Status

8904A

and generate whatever response

to

help you understand how to retrieve Status Byte

first

enable the interrupt

Byte

value. You can then use

to

the condition

3-32

Model

8904A

Operation

10

20 30

40 DIM Error$[250] 50 Select_code=7 60 H pi b_address=726 70 Mask=67 80 OUTPUT Hpib-address;"SM",Mask

90

100 110 ON INTR 7 GOT0 Service-request

120 ENABLE INTR Select_code;2 130 OUTPUT Hpib-address;"APE 140 150

160 Service-request: 170 Status-byte=SPOLL(H pib-address) 180 SELECT Status-byte 190 CASE =65 200 Errors$="HP-lB Programming Error" 21 220 Errors$="Timebase Out Of Lock" 230 CASE ELSE 240 Errors$="" 250 END SELECT 260 PRINT Error$ 270 END

! !

EXAMPLE PROGRAM

!

0 CASE =66

OF

STATUS BYTE USE

1

VL"

FOR

HP 8904A

!

HP-IB address of HP 8904A.

!

User defined mask value.

!

Send mask to HP 8904A, this

mask allows of lock

!

When

!

'

Enable computer

!

HPlB programming error to

!

demonstrate an

!

Routine to check status byte.

!

Get status byte.

!

Determine error type.

SRQ,

timebase out

81

HPlB errors.

SRQ,

goto service routine.

SRQ

interrupt.

response.

Select-code 7 indicates HP-IB as the source. The 2 is this computer's code that tells

interrupt.

Figure 3-13.

Sample Program for Using Status

Byte

Information

it

to allow on

SRQ

3-33

Operation

Model

89048

3-8.

Error

Number

ERROR CODES AND HELP MESSAGES

When the beeps to let you

The table

the

Table

0

1

2

3

4

8

10

The key selected does not correspond to the function selected.

There

A

Invalid

The

A

Manual to isolate the problem. The instrument cannot access the output board that connects to the OUTPUTS

HP

8904A

detects an inappropriate operating condition (such

know

that a message about the condition

HP

8904A’s Help display

lists

the

Error

Number for each Help Message displayed

operating conditions that

3-9.

Error

Numbers

is

no new message.

key

was

selected without specifying what the data

HP-IB

address entry.

0

or U key cannot be used

key on the front panel

8904A

Service Manual to isolate the problem.

is

accessed

will

cause the

and

Description Listings

(Only

is

stuck.

by

00-30

with

this function.

This

is

pressing the

HP

(decimal) are valid entries.)

normally found at power-up. Refer to the

8904A

0

escr

as

when an inactive key

is

available on the Help display.

blue

SHIFT

by

to display

for

the

i

p

tio

n

was

related to.

key and then the

the

HP

the

message.

HP

8904A’s

8904A

is

pressed),

HELP

key.

The following

along with a brief description of

Help

Messages

HP8904A

1

connector. Refer to the

(1

of

Service

3)

it

11

12

16

13

14

15

17

18

19

20 22 24

A

hardware error

was

detected

by

the power-up checks. Refer to the

HP

8904A

Service Manual to isolate

the problem.

The reference loop

the Digital Synthesis

(A2)

assembly

is

out

of lock. Refer to the

of

Manual to isolate the problem.

The Special

A

reverse power error was detected on an output board. (Disconnect the affected output

equipment and re-enter the key sequence that originally resulted

by

the instrument, a reverse power problem still exists.)

Function

display can

only

be accessed

from

the Main Selection Level.

in

the error.

If

an error

The recalled Save Register does not contain a SAVE setting. The selected function cannot

performed

in

the present mode.

(For

example, the

be

be executed directly from the Main Selection Level.)

An

invalid Special Function number

was

entered.

(Only

Special Functions

0

-

15

(decimal) may be

entered.) The Special Function number

occurs when the data

input

was too large for the instrument

is

greater than

65535.

to

recognize

(Refer to Error Message

it

17

concerning the range of

Special Functions available.) The number entered was Increment Set

An

operation was directed

There are

is

not

no

set table modes

the Hop Parameter

Any

other key, such as

too

available

display

AMPTD,

large for the function selected.

with

the function selected.

to

an

output

board

which

does

or

lists

functions at

only

four keys that

has

no

this

meaning

instrument level.

will

in

this

not

exist.

(For

example,

perform a function

mode and

will

result

in

this

in

this

in

mode:

HP

8904A

from

is

still

FREQ

function cannot

as data.

Hop

This

Mode Operation

fl,

f2,

error.)

Service

any external

detected

condition

f3

and 14.

3-34

31

-Channel Configuration Errors-

is

Instrument

not configured for destination control.

rev.

01

JUL91

Model

8904A

Operation

lbble

Error

Number

41

42

43

44

45

46

47

48

3-9.

Error

Numbers and Description Listings

-Hewlett-Packard Interface Bus (HP-IB) Errors

HP-IB numeric input error. Exponent too large or improper number format. HP-IB numeric input error. The number was too large

when a positive value was required.

A

number value was sent via HP-18 when one was

Invalid unique data was input via HP-IB. (Unique data specifies the Waveform, Modulation Type, Modulation On/Off Control, and Filter Selection, when entering a data string via HP-16.)

Unique data was received via HP-IB when none was expected. (Refer to Error unique data.)

An invalid terminator for the present data type was received via HP-IB. units

of

the data entered: i.e., Hz, Degrees, Volts, Seconds, Percent, etc: the ENTER command is also

included in this group.) A Data Terminator was received via HP-IB when none was expected. (Refer to Error

explanation of data terminators.)

A

combination of errors and correct than eliminated.)

it.

Enter the data again and read any error messages that result: an error number other

48

should be displayed. The second error message should help to further isolate the error

41

through

47

probably exists. (Confirm that at least one of these errors exists

for

the

Description

-

or

not

expected.

HP

8904A’s

too small, or a negative value was received

Help Messages

44

for an explanation of

(A

data terminator specifies the

46

(2

of

for an

3)

until

it

is

50

51

52 53

54

55

56

57

58

59

101

102

-Signal Sequence Mode Errors-

Time value entered is out of range.

Off

On and Amplitude value entered Frequency value entered is out of range. Tone Number entered is out of range. [Only tone numbers Sequence Index value entered Sequence End value entered is out of range. (Valid Range

The number entered is not valid in the Sequence Base selected. (Either the Binary, Octal,

Hexadecimal base numbering system is used to specify the Sequence Index and Sequence End. For example, you may not use the character

this number does not exist in that numbering system.)

Command not permitted in this mode. Command not available in present window.

-Destination Control Errors-

Channel A cannot be used as a source for be modulated, but it cannot be used as a modulation source.)

Channel

Time values cannot both be zero.

is

out of range.

is

out

of range. (Valid Range

‘9

when you have previously specified the Octal base, since

AM,

FM,

DSB,

A

has a Waveform of dc and cannot be modulated.

0-F

(Hexadecimal) are valid.]

is

1-250.)

is

1-250.)

or

Phase or Pulse modulation. (Channel A can.

103 104

A

channel which has a Waveform of dc cannot be used as a modulation source.

An operation was directed to an output board which does not exist.

3-35

Operation

able

3-9.

Error

Numbers

ana'

Description

Listings

for

the

HP

8904A's

Help

Messages

Model

(3

of

8904A

3)

Error

Number

105

106

107 108 109

110 111

112

113

114

115

Description

~~

AM and DSB are mutually exclusive modulations and one is already active.

to

An attempt was made

with channels C+D is permitted. The Hop Ram is presently enabled as this modulation source. The Frequency set value selected is greater than the permitted maximum for pulse modulation. The Frequency set value selected is greater than the permitted maximum for this waveform. Either AM or DSB modulation is active The present value

the Amplitude Hop Ram cannot be turned The present value of the Hop Ram frequency settings will exceed the maximum permitted value and therefor

the Frequency Hop Ram cannot be turned on. The attempted Frequency Hop Ram set value is greater than the permitted maximum for this Waveform.

Phase modulation is presently active, therefore Phase Hop cannot be changed.

The present Channel

Frequency Hop Ram is disabled.

-Miscellaneous

Errors-

use a second summer. For this configuration of

so

Amplitude Hop Ram cannot be changed.

of

the Hop Ram amplitude settings will exceed the maximum permitted value and therefon

on.

A

waveform cannot be used at the present frequency setting of Channel A if the

two

summers, only channels A+B

12T 122 123 124

150 151 152 153 155

1

60

200 201

The amplitude value selected is greater than the permitted maximum. The amplitude value selected results in a sum which is greater than the maximum permitted value. The frequency value selected is greater than the maximum permitted value. When the Amplitude Hop Ram was disabled, the last Channel A amplitude setting could not be used with

present instrument parameters. (Adjust the the Channel A amplitude to within non-Hop-Ram limits.) The selected Waveform cannot be generated at the present frequency setting.

Off

The dc Waveform can only be selected for a channel which has an Output Port or

A

Channel You can sum only one channel with a dc Waveform into an output board, and one is already active. The Sync Clock signal needed for phase synchronization is not present.

An operation was directed to an output board which does not exist.

The Tone Frequency only has a range of The Pilot Level maximum in

Waveform cannot be changed to dc while being modulated.

20

Hz

to

15

Hz

100%.

as a destination.

3-36

rev.OlNOV89

Model

3-9.

8904A

SPECIAL

Introduction

Operation

FUNCTIONS

The special functions alter the instruments operating ‘environment’ in order

to

instrument responds functions perform simple operations, such

as

disabling the automatic phase reset in the Digital Synthesis

Special finctions can only be changed when the instrument is at the Main

Selection Level. Performing an instrument

functions. Using

Enabling and Disabling Special Functions

From the Main Selection Level, press the

the list of specials. When the special you are changing

or

disable that function. Exit the SPECIAL menu by pressing the

Special

0:

Last State Recalled

Enabling this function tells the instrument the unit is turned off. When the instrument selected. This effectively provides a dedicated store/recall register

same settings.

1:

Disable Automatic Phase Reset

changes in different instrument settings

as

disabling the beeper, and more complex functions, such

IC.

NOTE

PRESET

the

MAIN

key does not effect specials.

SPECIAL

on

Power Up

to

key. Use the

is

remember the instrument settings

is

turned back on, the same settings

f4

to

turns

to

change how the

or

operating conditions. These

off

all special

and

LAST

keys to scroll through

f2

and

ON

or

OFF

key.

that

are present when

are

automatically

eliminate the need

to

reenter the

to

enable

When operating ‘normally’ in the Channel Configuration mode, the HP

to

of each channel

any phase offset

to

reset

existed before the change occurred.

Enabling this special function prevents the phase reset from occurring.

of one channel change the frequency

phase-continuous operation of the

This effect can be demonstrated by displaying

the frequency in

frequency

Special

The beeper normally beeps twice when the instrument

error occurs during operation. Enabling this special prevents the beeper from working in either case.

Special

The modulating waveform

the ramp. Normally the ramp waveform

This special function reverses the ramp when used

the positive peak and ramping down.

a zero-crossing point in there respective waveforms, regardless of the phase relationship that

is

2:

Disable Beeper

3:

Reverse Modulating Waveforms

zero(0) whenever the frequency

that

has been specified

is

changed, the phase of the other channel(s)

of

a channel, the phase angle of that channel is not changed. This allows for

0.1

Hz

increments. When this special

changed when the special

is

reversed

is

maintained).

HP

8904A.

is

on, the phase does not change as the frequency

to

provide alternate modulating schemes, especially when using

starts

or

destination of any channel

All

signals

is

a

0.5

Hz

sinewave on an oscilloscope and then changing

is

off,

the phase resets to zero(0) when the

is

powered up, and then beeps once any time an

at

the negative peak and ramps

as

a

modulating source by starting the waveform at

8904A

with a phase setting of zero(0) are

As

not disturbed. Even when you

resets the relative phase

is

changed. (However,

the frequency

up

or

to

the positive peak.

destination

is

changed.

do

Sine, triangle, and square modulating waveforms are since they are symmetrical waveforms.

also

reversed, but the effect

is

not as noticeable

3-37

Operation Model

8904A

Special

4:

Disable Output Blanking

When the amplitude of a signal being output the discrete attenuators on the output board, the switching transients

Enabling changing the attenuators, thereby reducing the amplitude switching time any switching transients that may be present to be output in the process.

You can pre-define whether the output(s) will be floating instrument

Available only with Option

Available onlywith Option

this

5:

Floating Outputs on Power Up:

is

pmered-up.

6:

Enable Synchronous

7:

Configure

from

being output during the change. The blanking normally

special tells the instrument

mode:

005

-

Phase Synchronization. See section

as

Master Controller:

005

-

Phase Synchronization. See section

is

changed enough

signal

to

continue

is normally shut

to

output the signal during the process of

or

to

cause a change in the setting

off

or

‘blanked’ to prevent

lasts

about

to

about 2 msec., but allowing

chassis ground referenced when the

3A

for additional information.

3A

for

additional information.

14

of

msec.

3-38

rev.OlNOV89

Model 8904A Operation

3-10.

OPERATING TECHNICAL REFERENCE

Waveform Jitter

The for the digital-to-analog conversion process is approximately 1.67 conclude

Because

is

limited

Sinewaves produced by this process triangle waveforms

(21

due

occurs

(which

For

non-integer relationship (68.47). Therefore the

peaks of the triangle wave, do not always align with the clock. The result of this

fast transition 600 ns.

Unlike other types of jitter, the jitter produced by the the severity of the jitter particular waveform the jitter will be almost zero because the frequency relationship

frequency is harmonically related output clock

HP

8904A generates waveforms through a sampled digital process. The output clock frequency

MHz.

By Nyquist’s theorem, we can

that

the maximum possible frequency for the

it

is

impossible

to

600 kHz

600 ns) for square and triangle waveforms. This value doubles

to

the fact

when the frequency of these waveforms

is

example, if we choose a frequency of 24.5 kHz, this frequency divided

that

exactly

will

there

$

to

build an analog filter which has infinite cutoff slope, the maximum frequency

to

accomodate a realizable filter.

will

have excellent time stability, however, square, ramp, and

have

Jitter.

is

only one fast transition per cycle of this non-symmetrical waveform. Jitter

or

1,677,721.6 Hz).

The value of this jitter

is

fast

occurs

of

one DAC cycle before

is

predictable by calculating how

is

from the clock frequency. If we chose a different frequency, such as

the DAC.

or

after

to

the clock frequency the

HP

8904A would be

will

be one clock cycle of the DAC:

to

1200

not harmonically related

edges

of

the square

the correct time. This causes a maximum jitter

HP

8904A does not occur on every cycle,

far

from a perfect frequency relationship a

is

nearly integral: 72.005. Since this

fast

edges almost always coincide with the

lx7

FHz

(

N

ns

when using ramp waveforms

to

the DAC clock frequency

into

the clock yields

or

ramp waveforms, and the

is

that

800 kHz).

1.67

LHz

an occasional

of

and

23.3

kHz,

a

All sampled synthesizers have this jitter.

(of

sinewaves therefore has no jitter. In addition, the trigger outputs (both the polarity and zero crossing outputs from the Digital waveform being produced is a sinewave.

course DC and noise do not either). The sinewave has no instantaneous transitions and

Port)

will always have jitter; again, depending on the frequency selected, even

For

the

HP

8904A, all waveforms have this jitter except

Fine Amplitude Resolution

The

HP

8904A appears to have However, the available resolution is much better than what is shown. The displayed resolution limited each attenuator range. To understand how this works, an explanation

HP

All fine amplitude setting Waveform Synthesis integrated circuit. Normally the multiplier is used for various types also used to scale the amplitude of waveforms for summing, and

The analog output board has several attenuators which provide the large amplitude steps. The available attenuators are: 6

to

-6.02 are used

to

34

digits due to display constraints. There are actually 2048 available amplitude steps

8904A’s amplitude control is needed.

IC.

A

dB,

12

dB,

provide amplitude steps

dB).

The following table shows the output voltage ranges and which combination

for

each.

34

digits

of

available resolution when viewed from the front panel.

for

the

HP

8904A are handled in the digital domain using the Digital

very high performance 12 bit by

24

dB,

and

48

dB.

Various combinations

of

approximately 6

dB

(they are exactly $ of the previous scale which

of

the implementation

12

bit multiplier

of

amplitude modulation.

to

provide the fine level settings.

of

these attenuators are used

is

available in this

of

if

the

was

for

of

the

It

is

attenuators

3-39

Operation Model

8904A

lbble

3-10.

10.00

5.00

2.50

1.250

0.625

0.31 2

0.1 563

78.13

39.06

19.53

9.765

4.882

2.441

1.221

0.61

0.305

Output Amplitude Ranges and Their Associated Attenuators

V V

V V V V V

mV mV mV mV mV mV mV mV

mV

6.02

12.04

18.06

24.08

30.10

36.1 2

42.14

48.1 6

54.1

60.21

66.22

72.25

78.27

84.29

90.31

8

0

none

6 dB

12 dB

6,12 dB

24 dB

6,24 dB

12,24 dB

6,12,24 dB

48 dB

6,48 dB

12,48 dB

6,12,48 dB

24,48 dB

6,24,48

12,24,48 dB

6, 12, 24,48 dB

dB

0

to

5.01

to

2.51

to

1.251

to

0.626

to 0.313 to

0.1564

to

0.0782

to 39.1

to

19.6

to 9.766

to

4.883

to

2.442

to

1.222

to

0.611

to

0.306

to

0.153

The multiplier is used to “fill-in” the fine level steps between the Approximately half of the means that for each

212 = 4096

=

12

bit scale of the multiplier

6

dB

wide window there are

2048

is

used for setting the fine levels. This

2048

possible fine amplitude steps:

for

the

HP

~~

Actual

Resolution

2.4414

1.2207

0.6104

0.3052

0.1526

76.2939

38.1470

19.0735

9.5367

4.7684

2.3842

1.1920

1.0000

6

dB

analog attenuator steps,

mV mV mV mV mV

uV

uV uV uV uV uV uV uv uv uv

uv

8904A

While this arrangement yields a constant number of steps per resolution in volts is twice as fine for every

10

to

5.01

V

resolution in the

lOV-SV(neztfullscclle?ange~

2040steps

Resolution = 2.441

For

the 5 to

Resolution

2.51

V

=

20~~~ps

Resolution = 1.222

-

--

mV

range the resolution is:

mV

The minimum resolution

5

2040

is

range

limited

is:

to

6

dB

attenuator used.

1

pV

for the bottom of four ranges.

before, this fine resolution is not displayed on the front panel due

Steps this fine may be programmed over

HP-IB

or input from the front panel. To

6

dB

attenuator range, the

For

example, the actual

to

lack of display space.

steps from the front panel, the amplitude increment function must be used. the

10

volt full scale range can be stepped up or down by this amount using the however, until enough steps have occurred to

an

amplitude increment of

alter

the

2.44

mV could be set. The the amplitude

fl.

or

4

keys. The display does not change,

3;

digits of displayed resolution.

As

mentioned

For

example, on

get

small

3-40

Model

Filters

8904A

Operation

Since the

reconstruct the waveform

HP

8904A generates waveforms

to

remove the high frequency energy that is present. The Nyquist

as

digital words, a low-pass filter must be used to

Theorem states that to fully recreate a waveform, the sampling rate must be twice the highest frequency component in the waveform.

The

HP

8904A samples at 1.67

2.783:1, allowing a margin for Nyquist’s required

MHz

and allows frequencies up

2:l.

to

600

kHz.

This

is

a ratio of

The digital output contains the spectrum

shown in the following drawing.

0dE

-

-3dB

-

w

0

5)

I-

C-.

-I

a

z

a

WZ

-

I

Figure

A

filter must be used

frequency and its harmonics. In the

670KHZ

3-14.

Spectrum

to

remove the high frequency images grouped around the sampling

of

Signals Created

HP

8904A there are

by

the

HP

8904A

two

filters used for this purpose;

an

elliptic filter, and a gaussian filter.

0

The elliptic filter has excellent flatness, with a

-3

dB

cutoff at 670

kHz

and a very steep

cutoff slope. The gaussian filter has excellent group delay linearity but has a gentle cutoff slope and a

-3

dB

cutoff at 200

Filter

Selection

In

normal operation, the HP8904A automatically selects one of the

kHz.

two

filters, based on the

waveforms and frequencies used. The elliptic (sharp cutoff) filter is used for sinewaves and

noise, and any time a frequency

used

for

triangle, square, and ramp waveforms, and for pulse modulation. The elliptic filter

>

50

kHz

is

output. The gaussian (low overshoot) filter

is

can cause considerable ringing on transient waveforms. However, the gaussian filter does not cause ringing.

3-41

Operation

Model

0904A

Although the automatic filter selection algorithm normally picks the optimum filter, there are cases where you may want

manually pick one of the

two

filters.

For

example, you may

to

want to limit the bandwidth of the noise waveform. By using the gaussian filter, the noise bandwidth can be lowered from 600

kHz

to

200 kHz.

Manual selection of filters is accomplished by pressing the

(1

output number you are using instruments). When the output number output

is

displayed. You can then use the

the automatic filter selection function

for standard instruments, 1 or 2 for Option 002 equipped

is

entered, the filter that is presently active for that

fl

key

to

select the other filter and enable

if

desired.

FILTER

key, and then entering the

Phase Resolution

The nominal phase resolution for the

which can be entered from the front panel

is

hardware

A

12 bit word

Since the phase range

better than the 0.1 degree limit.

is

used in the Digital Waveform Synthesis IC

is

0

to

359.9 degrees, each bit in the twelve bit phase word represents a

HP

8904A is 0.1 degrees. This

or

over

HP-IB.

is

the smallest increment

The actual phase resolution of the

to

set the phase of each channel.

phase increment of 0.08789063 degrees. Since the resulting phase resolution from the digital process The

is

not an exact value, the instrument firmware limits the resolution

HP

8904A attempts

to

set the phase

as

close

as

possible

to

0.1

the requested value using the available phase resolution. This means that for any given phase offset there predictable error caused by the non-exact phase resolution of the hardware. In any case, the maximum value of the error due to the resolution can be mathematically shown half of the hardware resolution: 0.04394531 degrees.

Although the phase resolution is 0.1 degrees, there are some cases where the phase resolution can be degraded. Sinewaves and triangle waves always have 0.1 degrees of phase resolution at all frequencies. However, the ramp and squarewave waveforms can have reduced phase

at

resolution digital-to-analog converter clock rate of

certain frequencies. These special frequencies are EXACT sub-multiples of the

24

%

=

1.6777216

MHz.

These are the frequencies where the squarewave has no jitter and the ramp waveform has greatly reduced jitter. (Refer the

Jitter

information discussed earlier in this section). Example frequencies are: 26,214.4

13,107.2

Hz,

6,553.6

Hz,

3,276.8

Hz,

1,638.4

Hz,

819.2 Hz, and 409.6

Hz.

The phase resolution

at these frequencies is limited because the nearly instantaneous transitions in these waveforms

at

can only occur

the clock rate.

or

disable

degrees.

will

to

be one

be a

to

Hz,

For

example;

at

26,412.4

Time for 1 degree However, the DAC clock can change its output every

that for the phase to change the phase must be advanced enough

or

forward

backward reduced by one-half for each successive exact frequency which of reducing the phase resolution does not effect square because the jitter present averages out the switching point of the fast transitions and therefore allows small changes in phase. This process is analogous digital-to-analog converters.

Phase Continuous Switching

In the Channel Configuration Mode, the

continuous frequency a “phase reset” whenever the frequency changed. This

is

done to assure that the proper phase relationships between channels will

be maintained. The phase reset brings all the channels into phase alignment, but in doing

3-42

=

126,412,4

to

or

Hz,

one degree

1

Hzx360degrees)

at

all,

of

phase equals 105.169 ns of time:

=

105.1.69 ns

-

1

MHz

595.046 ns. This means

-

the phase must be moved 5.66751 degrees. In other words,

so

that the transition portion of the waveform can move

the next DAC clock. This effect reduction in phase resolution is

is

lower in frequency. This effect

or

ramp waves

to

the use of dithering with noise in

HP

8904A does not normally provide phase

amplitude switching. In normal operation, the

or

destination of any of the four channels is

at

other frequencies

HP

8904A performs

Model

8904A

so

causes a glitch Any phase offsets have specific meaning when the frequencies of the four

If

channels are harmonically related. the phase reset will cause all the channels to reset

if any). From that point, the channels will each continue on accumulating phase at their own

rate.

If

phase continuous frequency switching is desired, special function

This special function phase continuous. Activating this special phase relationships of the four channels perform a manual phase reset blue shift key and the the

Amplitude switches in the Channel Configuration Mode are also not phase continuous. When the amplitude so

that amplitude glitches resulting from changing analog attenuators

to

reach the device under test. There are switches with the disables the output blanking function. With special function

within

for

jump up

is

the frequency, amplitude, or phase mode will glitch free. The HP 8904A fixes the analog attenuation range highest amplitude loaded into the using the multiplier in the Digital Waveform Synthesis IC. The disadvantage of using this method accuracy and residual distortion of the waveform.

a given analog attenuator range will be phase continuous (see Amplitude Resolution

details on these ranges). When an attenuator range

to

use the capabilities of Option

is

or

down in level depending on which attenuator switches

that

for

will

disable the automatic phase reset

f3

softkey.

changed, the output will be blanked

HP

8904A. The first method

large amplitude jumps

the channels are at non-harmonically related frequencies,

to

zero phase

will,

however, result in operation where the specified

will

not be valid. To overcome this, the user can

to

realign the channels from the front panel by pressing the

for

approximately

two

methods of achieving glitch free amplitude

is

to

use special function

is

003.

Option

of

channel

HOP

RAM memory.

(>

003

gives the

A.

Any amplitude hops using this

All

6

dB),

fewer bits will be used which degrades the

(or

the specified phase offset,

#1

can be activated.

so

that frequency switches

13

ms. This is done

will

not be allowed

#4.

#

4 active, amplitude switches

crossed, however, there

first..

The second method

HP

8904A the ability

to

accommodate the

lower amplitude values are created

Operation

This special

will

to

fast

hopping

will

be a

hop

be

In the Tone Sequence and continuous switches between frequencies if no time has been specified, the HP 8904A will cutoff the sinewave at the set time (regardless of where the switching point will be) which will cause an audible click in the waveform. This caused b;y the sudden drop glitch is not desired, the on and off times specified must be modified will occur at a zero crossing.

DTMF

to

zero volts which is composed of high frequency energy.

Sequence Modes, the HP 89044A will perform phase

off

time is specified between tones.

so

that the switching

If

some off

If

this

is

3-43

Operation

3-1

1.

MENU

MAP

Model

8904A

The Menu Map illustrates the various menus for

to

help you familiarize yourself with the organization of the menus

perform each function. Different menus are accessed by

all

options of the

using

HP

and

the keys

8904A.

the

steps

in

the

DISPLAY

It

is intended required to

of the front panel.

Selecting Menus

The Channel Configuration and Sequence menus are accessed by using combinations of the

fl,

f3,

and

You

can always return the instrument

keys.

NEXT/LAST

to

the Main Menu level by using the

keys.

SHIFT

keys.

Menu Changes When Using

If you are using remote control via the "mode" the instrument is

if

example,

the controller tells the instrument to go

HP-IB

in,

Control

HP-IB,

the menu on the display only reflects the

and does not show the values for each field being changed. For

to

mode 0 by using the command the instrument displays the Channel Configuration Mode menu but does not change as you specify parameters for the different channels. To look at the parameters as they are being changed,

you

must manually select the affected menu.

and

area

MAIN

GMO,

3-44

-u

fI Special

Last state recalled on Power

[I

\I

Disaolr

L

-

X2 Disable beeper

I

'#5-15 (not yet

X-0

f2

Status

automatic Pnase

defined)

=

Off

reset

(4

UP

Exit

I'

I

8

fl

-

I

tttt

I-

fl

I

Diagnostic Tests and Checks

Keyboard Check

-

f4 Exit

tt

Press NEXT/LRST keys.

Channel Conf igurat

(4

ion

HP

8984R

Channel Config.

Mode

Exit

it

Main Selection Level

t

I

tt

Press NEXT/LAST keys.

Tone Sequence Mode

(4

Exit

t1:

C;

I

1

DTMF Sequence Node

NEXT/LRST keys.

(4

Exit

C

I

Digital Sequence Node

NEXTiLAST keys.

fi

Exit

**

I

c

IIa

~

-

fl

ROM

f2

LCD Check

Checks

-

f3 RAMCheck f4 Exit

-

ch

A:

FREQ 1000.0

PHASE 0.0

Deg

HZ

AMPTD 140

WFORM Sine

DESTN

uV

Out1

fl

Tone Number 0 FREQ 0.0 Hz

-

f2

On

I-

Time 1.00ms

(4

Off

Time 1.08ms

fl

Tone Number

-

f2

On

-

Time

0

1.00ms

f3

Manual Dial

Off

-

Time 1.00ms

Seq Base Hex

-

f2

On

Lev +I40

f3 Period .I0

uU

-

Off

Lev 0YV

ms

(1

PPL Check:

a0

-

f3 Memory Map Acess

f4

Exit

-

I

ao

00

ch

B:

FREQ 1000.0

ch

C:

I,

FREQ 1000.0

ch

D:

FREQ 1800.0

PHASE 0.0 Deg WFORM Sine DESTN

HZ

AMPTO

HZ AMPTD

HZ

AMPTO

a

fl

Hop

Ram

Adrs 0 Freq

AMPTDt

l-

fl Digital Port f2 Amptd Hop

0

VU

i

Off

PHASE

1:

8.0 Hz

t

0.0 Deg

E

Freq

HOP

f4 PhaseHop

-

(OPT

fOPT

X

i

(OPT

Off

001)

I

Off

003)

I

003)

I

a0

-

fl

Seq Index 1 [0123456789RBCDEFl

f2 Seq End 250

I-

(4

Edit Sequence

a0

fl

Manual

-

f2 Continuous

-

f3

AMPTD

Sinsle

(4

140

Stop

v

U

fl

Seq

Index

f2

Seq

End 250 Edit Sequence

-

fl

Manual

(2

Continuous

I-

1

C8123456789RBCDEFI

ao

AMPTD

f3

Single - 14 Stop

-

ao

140

v

V

I

-

fl

Seq Index

I-

f2 Seq End 250

(1

Manual

f2

Continuous

off

1

C01234567B9ABCDXXl

fi

Edit Sequence

a0

f3 Single

-

fi

Stop

I

3-45

Table

1.

Meet the

of

Contents

HP

8904A

Learn how to operate your HP

Option

2.

Modulate

Learn how to use the many modulation and summation capabilities provided by an HP channels.

3.

Output a Sequence

Learn how to output a sequence Multi-Frequency (DTMF) or Digital signals.

Option

4.

Output

Learn how to operate an HP Output Ports.

01

02

Two

or

Sum

Signals at Once

the Signals

8904A.

8904A

of

Signals

of

8904A

equipped with four

Tone, Dual-Tone

equipped with Dual

Option

5.

Hop

Learn how to ho the frequency, amplitude and phase the output signa

03

the Output Signal

P

Appendixes

A

-

Installation

B

-

Help Messages

C

-

HP-IB Codes

lndex

of

What

HP

8904A?

is

the

Note

Meet

The to meet your low frequency signal source needs by providing:

0

If

the installation suggestions provided in Appendix A.

the

HP

8904A

A

frequency range of dc to

Synthesized waveforms (sine, ramp, triangle, square, noise and dc).

Operating modes that meet the needs of a wide range of audio test, modulation source and communication signaling applications.

you are unpacking

HP

8904A

Multifunction Synthesizer is a flexible tool designed

600

kHz.

a

new

HP

8904A, you will want to refer to

What’s in this Guide?

Note

This Operation and Application Guide begins by helping you

HP

determine which operating capabilities your equipped with.

It is essential that

HP

8904A has been equipped with in order to use this guide

effective1 y.

The guide then helps you quickly learn to use your instrument‘s

capabilities by guiding you through setup examples that demonstrate the

HP

8904A’s

you

know which operating capabilities your

key features.

8904A

has been

7-2

Meet

Has

the

Your

HP

8904A

Been Equipped

Additional Features?

with

You

can quickly determine

if

your HP

8904A

has been equipped with

optional operating capabilities by performing the following steps.

1.

To

2.

Now

adjacent time the

power-up your

press the blue

HP

8904A

SHIFT,

HP

8904A,

SHIFT

key

diagram shows the

PRESET

keys are pressed, the HP

press the white

and

then the

PRESET

LINE

key.

(The

key location.) Each

8904A

briefly displays its Preset display. This display lists the Configuration Options that your HP

8904A

has been equipped with.

For example,

Configuration Options

the Preset display shown below indicates that all three

(01,

02

and

03)

are present. Note

which

options (if any) are listed in the Preset display on your instrument.

Once you have determined

equipped with, refer to Table

which

1-1

options your HP

8904A

is

for an overview of the capabilities

provided by your instrument’s configuration.

Meet

the

HP

890449

1-3

Table

1-1.

Provided

The Operating Capabilities

by

the

Configuration Options.

configured

al

summation

of

up

to

four

for

signals.

floating

01

Two

As

an

example,

internal

generating

an instrument equipped with all three Configuration

synthesized

my

one

of

signal

the

six

Options would have the following capabilities:

Four Channels (Option

0

Signal Sequence Modes (Option

Two Output Ports (Option

0

One Channel

(of

the four) that could be hopped (Option

01).

02).

~OUICBS

wavefms.

each

capable

of

03).

Note that each Output these connections

will

Port

provides

be demonstrated further later

both

a

High

and a

in

this chapter.

Low

connection. The operation

of

7-4

Meet

the

HP

890444

HP

8904A

Operation:

Guided

Tour

A

In this chapter, you will learn how to output each of the six waveforms.

If

your

HP

(01, 02

or

8904A

03),

is equipped with one of the Configuration Options

you will also want to refer to Chapters 2 through 5 to

learn to use the capabilities that they provide.

Table look at to learn to operate your

Table

If

your

No

Option Options Options Options Option Options

1-2

provides a quick guide to the chapters you will want to

HP

8904A.

1-2.

HP

Options

01

01 01,

01

02

Chapter Guide for

8904A

Only

and

02

and

has:

02

and

03

the

Various Configuration Options

Then

read

thro-

Chapter Chapters Chapters Chapters Chapters Chapters 1 and Chapters

1

1,

1, 1,

1,

2 2, 2, 2,

4

and

3 3, 3

4

and

3

and

4

and

5

and

HP

4

5

8904A’s

5

Now

io

Note

Begin

Option

You

03

Only

should complete the operating demonstrations contained in

Chapters 1 and

this chapter before referring to the remaining chapters matter which Configuration Options information provided in this chapter

HP 8904A

If

you are now sitting comfortably in front

configurations.

you

have. The operating

is

important to all

of

your

5

HP

no

8904A,

you are ready to begin. Start on the next page and follow the step-by-step guide to learning to operate your

HP

how the

8904A

can provide you with both the flexibility and

HP

8904A.

You will soon discover

precision needed for many signal source applications.

Meet

the

HP

8904A

7

-5

This chapter contains demonstrations that will help you learn how to:

Output a Signal Control the Output Port

Set

up

Your

EgUjpmenf

0

Save and Recall Your HP Turn

on the HP

Connect your

Adjust

Your

DiAplay

Volts/Division Coupling Time/Division

Trigger

HP

8904A

Oscilloscope

..........................................

................................

.........................................

...........................................

8904A's

8904A

Special Functions

Settings

to an oscilloscope as shown above.

dc (High Impedance)

Channel

0.5V

2

Channel

A

ms

A

7-6

M-t

the

HP

8904A

Note

You will find that the back-lighting for the is designed minutes if

to

automatically turn

no

keys are pressed. The display will light when you

off

after approximately three

HP

8904A's display

press any key.

Select

0;

I,

_*

.

-I

Chassis

1.

Press the blue

2.

Press the blue

3.

Press the 1 key

annunciator configured the chassis ground at

Ground

SHIFT

and

(LED)

HP

for

8904A's

OUTPUT

key

and

key

and

then the

OUTPUT

circuit ground to be referenced to

1.

then the then the

OFF

1

PRESET

FLOAT

key.

Note that the

is

now

off.

key.

You

FLOAT

have

(The chassis-ground output

configuration is used in this demonstration to minimize the set

up

requirements.

You

will

learn more about the

HP

8904A's

chassis and floating ground configurations later in this demonstration.)

4.

Adjust the oscilloscope's trace to center scale

on

the display.

Meet

the

HP

8904A

1-7

How

to

Output

a

Signal

You are now ready to learn how quickly and easily the enables you to set up the output signals you desire.

1.

Press the

HP

8904A's

11

1:

1-1

.a

t-I

e

1

1:

1~1

ri

f

1

g

,

Channel Configuration Mode.

softkey to enter the

Figure

how to access the Channel Configuration Mode.

2.

Press the

Channel A Configuration display.

td

Press

t

Channel

NEi(T/tRST

Lunfigurat

keys,

ion

f4

-

tlodr

Exit

XX:

1

HI?

1-1

8904A

shows

+

B*

ih

H:

PHHSE

Figure

FREQ

b3.B

deg

1 - 1.

Mode

m*

1BBB.B

HZ

HHPTD

blFORM

Sine

Accessing the Channel Configuration

is

as Simple as Pressing a Key.

148

DESTH

y'rl

Out1

1-8

Meet

the

Enter a Frequency

HP

8904A

3.

Press the

display.

FREQ

key to select the frequency entry field on the

Notice that the parameter entry fields in the display and the four SIGNAL keys below the display have been arranged in the same order to help you quickly find the key you want.

Note

Figure

--s--*-----

1-2.

The Display Fields and Entry Keys are

-~.-..rm-z&zJzc%

Similarly Positioned for Quick Access.

If

you enter

a

wrong

digit, simply press the *=key to backspace,

and then re-enter the correct digit.

4.

Enter

line rather than

120

Hz.

(If

your

60

Hz,

HP

enter

8904A

100

is

operating on a

Hz

for this demonstration.)

50

Hz

power

That’s all you have to do to enter the frequency you desire for your

1-3

output signal. Table

HP

your

8904A.

Table

1-3.

The Output Frequency Ranges of the

Sine

Square,

Triangle,

shows the frequency ranges provided by

HP

8904A.

0.0

Hz

to

600

kHt

0.0

Hz

to

50

kHr

Ramp

Noise

I

dc

Random

0.0

Ht

to

600

kHr

Meet

the

HP

8904A

1-9

Enter an Amplitude

Note

5.

Press

the

AMPTD

key

and

enter

1V.

A

1V

peak sinewave

should now appear on your oscilloscope display. (Adjust the

oscilloscope's triggering

With the pressing the

HP

8904A, setting up your output amplitude

AMPTD

key and entering the value you desire

The amplitude level shown in the

if

needed

for

a stable display.)

HP

8904A's

is

display reflects the output signal level in peak volts when it is terminated impedance input terminated by a

(>

50

kQ), and peak-to-peak volts when it is

50

R

input. (Throughout this demonstration, the

oscilloscope is assumed to have a high impedance input.)

as easy as

(0

to

1OV).

by

a high

a.

High

Figure

Impedance Termination

1-3.

Output Amplitude provided

by

the

UP

b.

8904A

50R

Termination

when set at

I

V.

1-70

Meet

the

HP

8904A

Select

a

Waveform

Selecting any one of the

6.

Press the

HP

8904A’s

HP

8904As

7.

Press the + (ramp) key, the key, the

WAVEFORM

six

default selection.)

NOISE

key and then the

HP

8904A’s

key.

You can now select any one of the

six

waveforms

is

waveforms. (Note that the sine waveform

+t

(triangle) key, the

=

(dc)

key to output each

the five additional waveforms.

8.

Now press the % key to select the square wave output.

Ramp

IlltDIltl

tlllSIIII

llfllll

just as easy.

is

the

‘L

(square)

of

Now

Vary

the

Phase

Meet

the

HP

890411

The

HP

8904A

0

degrees to

9.

Set the oscilloscope to trigger on the line voltage.

allows you to vary the phase of your waveforms from

359.9

degrees in step sizes specified by you.

(You

need to adjust the oscilloscope’s triggering in order to get a stable display.)

10.

Press the

Notice that the HP

F‘

H

A

PHASE

S

E.

This is to let you know that the value now being

key and the

8904A

has placed an “is” in its display next to

INCR

SET

key on the

HP

8904A.

displayed is the increment set value rather than the current phase setting.

may

1-1

1

Press

11. 45

12.

Now press the 0 key.

each time the phase of Channel the resulting change in Channel

45

and the

degrees.

deg

key to enter an increment step size

(Notice that the displayed waveform shifts

A

is incremented. This is due to

As

phase relationship with the

of

line voltage signal that is being used to trigger the oscilloscope.)

13.

Press the 0 key and the

0.0

setting to

14.

Set the oscilloscope to trigger on Channel A again rather than

degrees.

deg

key to return the

HP

8904A‘s

phase

the line voltage.

The HP

triangle or ramp waveforms from

8904A

allows you to vary the phase of its sine, square,

0

to

359.9

degrees in

0.1

degree

steps.

That’s how easy the HP

8904A

makes it for you to create any of its

six waveforms at the frequency, amplitude, and phase setting that

you

desire.

Figure

1-4.

I

Precise

I

45”

Phase Shift

I

1

I

1

I

of

the

HP

8904A.

1-12

Meet

the

HP

8904A

How

to Control

the Output

Port

With the HP a

floating

configuration allows ground level of the input device that the HP

You

can also

8904A,

ground

turn

you can

choose

either a

chassis

circuit configuration. The floating ground

you

to reference the HP

8904As

8904A

off

the HP

8904A’s

output path to completely

remove the output signal from the Output Port. Figure

inform

THE HP-18 LEDs LET YOU KNOW THE CURRENT STATUS OF THE HP 8904AS

REMOTE OPERATING CAPABILITIES.

1-5

shows the HP

you

of

the current configuration statps of each Output Port.

8904A’s

Output Port

THESE LEDs LET YOU KNOW WHETHER OUTPUT PORTS ARE CONFIGURED GROUND (LED ON) GROUND (LED

FOR

OR

OFF).

is

LEDs.

1

AND

FLOATING

CHASSIS

ground

or

ground to the

connected to.

These

LEDs

2

Figure

HP

8904A’s

1-5.

The Front Panel

Current Output and

WHETHER OUTPUT PORTS 1 AND 2 ARE TURNED ON (LED ON) TURNED OFF (LED OFF).

LEDs

Inform

HP-IB

You

Operating Status.

of

OR

the

Turn

Off

the Output

Meet the

1.

Press the

blue

SHIFT

key

and

then the

Control display should now appear on the HP

2.

Press the 1 key.

This designates which Output

OUTPUT

HP

8904A

key.

The Output

8904A.

(1

or

2)

you to control. (Output 2 can be turned "On" only when the HP

3.

Press the

ON

8904A

LED

is equipped with Dual Output Ports, Option

OFF

key.

You have turned

for

OUTPUT 1 is no longer lit, and that the output

off

Output

1.

Note that the

02.)

signal no longer appears on the oscilloscope display. You have

disconnected the output signal

from

the Output

Port.

7-73

wish

Note

The

HP

8904A

maintains a constant

output whether the output is

OUTPUT

SIGNAL

Figure

\

7-6.

The Output Signal is Switched Away from

the Output

Port when the Output is Turned Off.

on

or

50

ohm impedance at its

off.

1-14

Meet

Turn

On

the

HP

8904A

Output

4.

Now

5.

Press the

press the

FREQ

AMPTD

key and enter

output amplitude provided by the HP

6.

Adjust the volts/division setting

oscilloscope to

7.

Press the blue

SV,

and the time/division setting to

SHIFT

key and then the

Output Control display.

8.

Enter 1 and then press the

ON

OUTPUT 1 is now lit.

20

1OV.

(Ten volts is the maximum

8904A.)

for

Channel A

key.

Note that the

kHz.

OUTPUT

on

the

20

ps.

key to access the

ON

LED

for

Turning the HP

8904A’s

Output Port

off

can be useful when you wish to make changes to the output signal but you do not want the intermediate transitions present at the output.

Meet

the

HP

8904A

1-15

Channel

versus

Output

In the source. The standard channel. Instruments with Option

and those with Option provides dc)

Output

configuration provides 1 Output Output Port.

HP

8904A,

six

waveform choices (sine, ramp, triangle, square, noise and

.

refers to an HP

CHANNEL

A

Channel

HP

8904A

02

only have

8904A

refers to an internal synthesized signal

Output

configuration provides a single

01

capabilities have four channels

two

channels. Each channel

Port.

Option

The standard

02

adds a second

HP

OUTPUT

8904A

1

Figure

Table Configuration Options.

1-4

lists the channels and output ports provided by the

Table

1-7.

Provides One Channel and One Output

1-4.

Channel and Output

The Standard

HP

8904A

Port

Configuration

Configuration Options.

Port.

1-16

Meet

the

HP

8904A

Choose Between

Chassis

Floating

~~~~~d

or

Chassis Ground

At

the beginning of

this

demonstration,

you

configured the HP 8904A’s circuit ground to be referenced to chassis ground. Figure

1-8

shows a simplified

block

diagram of the chassis ground

configuration.

FLOATING

GROUND

Figure

Floating

Ground

When the FLOAT ground

is

1-8.

Circuit Ground is Connected to Chassis

Ground when the

LED

not referenced

FLOAT

LED

is on for Ouput 1 or

to

chassis

ground at that output. (Floating

is

Off.

2,

the HP 8904A’s circuit

ground is the HP 8904As Preset, or default, output configuration.)

Meet

the

HP

8904A

1-17

Caution

The floating ground configuration circuitry to be referenced

to

(LED

on) allows the HP

8904A’s

an external ground rather than to chassis ground. This configuration eliminates ground loops between the HP

8904A

and the input device. Figure

1-9

shows

two

methods for

connecting the floating Output Port to an input device.

The voltage differential between the and

its

chassis ground level should not exceed a maximum

HP

8904A’s

floating ground level

of

10

Vpk.

a. Using

two

BNC

cables provides maximum shielding where

High and Low inputs are also available.

Figure

7

-9.

Cable Connections for the Floating Ground Output Configuration.

b. Using an adapter allows the High and Low Output

be connected to a single input port.

Ports

to

1-18

Meet

the

HP

How

to

Save

and Recall

8904A

You

can easily save all

and recall them whenever you wish.

of

the operating settings you have entered,

Set

Your

Up

Settings

a Save Register

I

*-..

-*..

.^’.

I

.-

1.

Press the blue

SHIFT

key

Register display.

2.

Press the 1 key

the HP HP

Now

Return to the Main Selection Level

3.

Press the blue

you to the

8904A’s

8904A

and

then the

current settings in Save Register

provides

HP

12

Save Registers

SHIFT

key

8904As

Main Selection Level display.

and

the

SAVE

ENTER

the

MAIN

key to access the Save

key.

You

have stored

1.

The

(0-11).

key.

The

MAIN

key returns

all

of

Meet

the

4.

Press the

11

1:

1-1

a

t-i

e

1

1:

o

t-i

f

i

83

softkey to return to the

Channel Configuration Mode.

5.

Press the display.

Note that each of Channel

A's

parameters were reset to their default settings when you re-entered the Channel Configuration Mode.

HP

8904A 1-19

Remember

Recall Your Settings

Remember

Whenever the and then re-enters it

HP

8904A

or

exits the Channel Configuration Mode

any other operating mode, all

parameters are reset to their default settings.

6.

Press the blue

SHIFT

key and then the

RECALL

key to access the

Recall Register display.

7.

Press the 1 key

and

then press the

ENTER

key.

The

HP

8904A

now returned to the same operating state it was in when you set up Save Register

When you Recall a Save Register, the

1.

HP

8904A

returns all

of

parameters (except Special Functions) to the same settings that existed when the Save Register was selected.

is

its

1-20

Meet

the

HP

8904A

How

On

the Special

to

Turn

mnctions

Access the

Special Functions

".

Turn On Special

..I-.-___-

.

-

Function

0

The Special Functions permit you to modify the HP

8904A's operation to best meet your needs. In this demonstration, you will turn on the Special Function that configures the HP up to the state it was in before power was turned

off,

8904A

to power

rather than to

the Main Selection Level.

1.

Switch the white on.

Notice that the HP

LINE

key

off

8904A

for a few seconds and then back

has powered up to the Main

Selection Level.

2.

Press the blue

HP

8904A's

turn on the HP

3.

Press the

have turned "On" in the display to let you know that Special Function now turned on. Special Function

SHIFT

key and the

Special Function display.

8904A's

12

5;

t

a

t

on

Special Function

Special Function capabilities.

1-45

softkey and then press the

SPECIAL

key to access the

This display allows you to

ON

key.

0.

Notice "Status" now equals

0

enables the HP

8904A

0

to

You

is

power up to the operating settings that existed when power was turned

off.

4.

Press the

Note that the Special number in the display increments each time you press the

Special Function that is provided by your instrument.

5.

Press the

f4

E::.::

1

t

softkey to return to the Main Selection

Level display.

Now

Try

Special

Press the

6.

to access the Channel

7.

Now switch the white back on.

Function

fl

1:

Pi

Your HP

0

t-i

e

8904A

1

C

1-1

t-i

f

1

g

,

softkey and the

A

Configuration display again.

LINE

key

off

for a few seconds and then

should power back up to the same state

it was in.

Meet

the

HP

8904A

1-21

Main

versus

Preset

Save Registers

are Retained

Special Functions

are Turned

Off

The HP returning its operation to the Main Selection Level. It that you are aware the status

1.

8904A

always provides you with at least

of

the

HP

Press the blue

key and the

The

PRESET

key however, resets the HP

two

methods for

is

important

of

the effects that each

8904A’s

SHIFT

key

settings.

and

then the

of

these methods has on

PRESET

key.

Both the

key return you to the Main Selection Level.

8904A’s

functions to their

pre-defined power-up condition, including the Special Function

settings and Floating ground.

2.

Press the blue press the

settings are retained whether you use the

ENTER

SHIFT

key, the

key.

Note that the HP

RECALL

key, the 1 key

8904A’s

Save Register

MAIN

key or the

and

key (or even if the instrument is powered down).

3.

Switch the

back

ON.

pressed the

Main

HP

8904A’s

Since Special Function 0 was turned

PRESET

power

key, the HP

OFF

for a few seconds and then

off

when you

8904A

now powers-up to the

Selection Level rather than the state it was in.

Table

1-5.

and

Summary

MAIN

keys affect Operation.

of

how the

PRESET

MAIN

then

PRESET

08s

not

uding

reset

Save

Special

Registers.

hrnction

settings

and

Floating

1-22

Meet

the

HP

8904A

Things

to

Remember

Congratulations, you are now familiar with the key operating capabilities that are standard to all final settings that you entered for Channel

HI’

8904As.

A

in this demonstration.

Table

1-6

shows the

Similar tables are used in the remaining chapters to describe the channel configurations for various application examples.

From now on, when your application requires a function generator,

modulation source or stimulus for audio circuit testing you can rely

on the

HI’

8904A

to provide the flexibility and accuracy that you

need.

Table

A

1-6.

The Channel A Settings from

the Chapter

Off

20

1

Demonstration.

kHz

1

ov

0.0

deg Square

contrd

Enter

Amplitude

output

Turn

Functions

Noise

Off

Output

Special

Pon

0

Floating ground

0

The

output

Port

is

turned

0

The

displayed when the impedance

connected

0

The

Noise function

Gaussian

0

The amplitude value

level of the noise.

0

Special Function settings are turned

PRESET

is

key is pressed,

pressed.

(LED

on)

is

the default

impedance

on

amplitude value represents

HP

8904A

input

to a

50n

white

noise.

is

5Ofl

or

off.

is

connected

or

peak-togeak

input.

provides

you

enter

but

pseudorandom,

not when

whether

to

vdts

sets

the

a high

the

off

the

output

Output

peak

when

it

peak

output

when the

MAIN

settin$

volts

is

key

Agilent 8904A Operator Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter

DESCRIPTION

OPTIONS

MECHANICAL AND DOCUMENT OPTIONS AND ACCESSORIES

ELECTRICAL OPTIONS

Option

Option

Option

HEWLETT-PACKARD INTERFACE BUS

Compatibility

ACCESSORIES SUPPLIED

RECOMMENDED TEST EQUIPMENT

DOCUMENTATION UPDATING

Serial Numbers

Signing Up for the Documentation Update Service

Operating Environment

Bench Operation

Operating Considerations: Option

Abbreviated Specifications: Option

General Information

General Information

Using the Status Byte

ERROR CODES AND HELP MESSAGES

Introduction

OPERATING TECHNICAL REFERENCE

Waveform Jitter

Fine Amplitude Resolution

Filters

Phase Resolution

Phase Continuous Switching

Selecting Menus