Agilent 70340A User's Guide

User's Guide

HP 70340A/70341A

Signal Generators

ABCDE

No.

art

P

HP

Printed

USA

in

Edition

September

5960-7096

1992

B.0.0

Notice

The information contained in this do cument is sub ject to change without notice.

Hewlett-Packard makes no warrantyofany kind with regard to this material, including,

but not limited to, the implied warranties of merchantability and tness for a particular

purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or

consequential damages in connection with the furnishing, performance, or use of this material.

Restricted Rights Legend.

Use, duplication, or disclosure by the U.S. Government is sub ject to restrictions as set forth

in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause

at DFARS 252.227-7013 for DOD agencies, and subparagraphs (c) (1) and (c) (2) of the

Commercial Computer Software Restricted Rights clause at FAR 52.227-19 for other agencies.

c



Copyright Hewlett-Packard Company 1992

All Righ

ermission

p

oun

F

1400

Reserv

ts

is

taingro

Repro

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prohibited,

arkw

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duction,

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under

95403-1799,

CA

translation

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cop

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USA

without

ws.

la

t

prior

written

Certification

Hewlett-Packard Company certies that this product met its published specications at the

time of shipment from the factory. Hewlett-Packard further certies that its calibration

measurements are traceable to the United States National Institute of Standards and

Technology, to the extent allowed by the Institute's calibration facility, and to the calibration

facilities of other International Standards Organization members.

Warranty

This Hewlett-Packard instrument pro duct is warranted against defects in material and

workmanship for a perio d of one year from date of shipment. During the warranty period,

Hewlett-Packard Company will, at its option, either repair or replace products whichproveto

be defective.

For warranty service or repair, this pro duct must be returned to a service facility designated

and

ard

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improper

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of

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD

SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY

AND FITNESS FOR A PARTICULAR PURPOSE.

Exclusive Remedies

THE REMEDIES

REMEDIES.

HEWLETT-P

PR

VIDED

O

HEREIN

CKARD

A

INDIRECT, SPECIAL, INCIDENT

BASED ON CONTRA

CT, TOR

T, OR

ARE

SHALL

BUYER'S

NOT

SOLE

BE LIABLE

AL, OR CONSEQUENTIAL D

ANY OTHER LEGAL THEOR

AND

DIRECT,

ANY

OR

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AMAGES, WHETHER

Y.

CLUSIVE

EX

Assistance

available

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iii

Safety Symbols

The following safetysymbols are used throughout this manual. Familiarize yourself with each

of the symbols and its meaning b efore operating this instrument.

CAUTION

sign denotes a hazard. It calls attention to a pro cedure

The

which, if not correctly p erformed or adhered to, could result in damage to

or destruction of the product or the user's work. Do not proceed beyond a

WARNING

CAUTION

The

WARNING

sign until the indicated conditions are fully understoo d and met.

sign denotes a hazard. It calls attention to a procedure which,

if not correctly performed or adhered to, could result in injury to the user. Do

not proceed beyond a

WARNING

sign until the indicated conditions are fully

understood and met.

DANGER

sign denotes an imminent hazard to people. It warns the reader

The

of a procedure which, if not correctly performed or adhered to, could result

the

until

of

loss

or

injury

in

indicated conditions

life. Do

are fully

not proceed

understood and

beyond

a

met.

ANGER

D

sign

iv

General Safety Considerations

WARNING

ARNING

W

The instructions in this document are for use by qualified personnel only.To

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

to do so.

The opening of covers or removal of parts is likely to expose dangerous

voltages. Disconnect the instrument from all voltage sources while it is being

opened.

The power cord is connected to internal capacitors that may remain livefor

five seconds after disconnecting the plug from its power supply.

This is a Safety Class 1 Product (provided with a protective earthing ground

incorporated in the power cord). The mains plug shall only be inserted in a

socket outlet provided with a protective earth contact. Any interruption of the

protective conductor inside or outside of the instrument is likelytomakethe

instrument dangerous. Intentional interruption is prohibited.

same

with

only

fuses

fuse

or

materials

is

continued

For

type

protection

and ratings,

against

(type nA/nV).

hazard,

fire

The use

replace

of other

prohibited.

properly

been

has

it

sure

e

mak

conductor

e

earth

e

on,

contact.

of

the

ac

po

et

sock

a

to

cable

er

w

Before

this instrument

grounded

pro

outlet

through

vided

with

is

protectiv

the

protectiv

switched

sure

e

ac po

correct

conductor,

e earth

primary

its

source.

wer

voltage

interruption

Any

instrument,

the

personal injury

instrument

been

ailure

this

adapted

set

to

Before

has

F

the

of

disconnection

or

.

to

po

ac

the

protectiv

switched

is

oltage

v

the

er

w

input

(grounding)

e

protectiv

the

of

mak

on,

the

of

the

to

to the instrument when the ac power cable is plugged in.

po

or

w

can

er

inside

terminal

could cause

outside

result

circuitry

damage

in

v

HP 70340A at a Glance

Generator

Logarithmic

GHz

1

from

1GHz

+8

than

AM,

20

to

frequency

bination

com

and high

dBm

Pulse

and

GHz. The

to

range

from

is

level

signal

the

0.01

accuracy

to

HP

The

HP

The

dulation

mo

70341A

HP

generator,

GHz.

20

70340A

capabilit

frequency

and th

With

mo

us, the

ecied

sp

The

HP

and

signal

dular

carrier

The

.

y

extension

frequency range

eled

lev

70340A

HP

70341A

generator

frequency

dule

mo

output

p

pro

of

w

o

Modular

vides

pro

range

vides

HP

the

greater

of

er

Signal

FM,

is

0.01 to

70340A/41A

over frequency,power level and temperature, the HP 70340A and HP 70341A havethepower

and exibility to meet automatic test needs. Additional sp ecication and options information

for both the HP 70340A and the HP 70341A is in the chapter, \Specications and Options".

vi

1.

Functions and submenus

appear on the right-hand side

of the display during front

panel operation.

turn HP 70340A/41A features

on and o and/or allow data

entry.

Submenus

of related functions. The

functions and submenus that

are available change according

to the selected main menu.

2.

The

Frequency menu

to select the CW frequency and

the frequency multiplier value

of the RF output signal. When

men

main

this

frequency

the

of

on

the

accessible

side

Functions

access groups

is underscored,

u

functions

righ

the

.

y

displa

is used

are

t-hand

6.

The

State menu

save/recall most of the

HP 70340A/41A operating

parameters to/from anyofnine

nonvolatile register locations.

When this main menuis

underscored, the state

functions are accessible on the

right-hand side of the display.

7.

The

Miscellaneous menu

accesses HP 70340A/41A

features (suchasservice

functions) which are less

used.

frequen

main

asso

accessable

side

tly

men

ciated

the

of

is

u

functions

on

displa

is used to

this

When

underscored, its

are

t-hand

righ

the

.

y

11.

The

modulation inputs

(EXT PULSE, EXT AM, and

EXT FM) provide BNC

connections for external

modulating signals. The signal

generator RF output can be

modulated with any

combination of

AM,FM

modulation

the

PULSE/TRIG, GATE IN

connector is also used as a

trigger/gate input for certain

internal pulse mo dulation

modes.

12.

The

LSN, TLK, and SRQ) indicate

the status of the instrument

when it op erates over the bus.

Status

The

ERR.

the

when

address

instrumen

displa

errors

ERR

condition

is

map,

k

y

are

LED

logarithmic

and

pulse

. With Option 1E2,

HP-IB LEDs

LEDs

CT

A

signal

selected

when

link

is

t

oard,

eyb

eing

b

ts

ligh

exists.

(RMT,

ACT

are

LED ligh

generator

the

in

the

to

ed

when

or

orted.

rep

an

when

and

ts

The

error

Amplitude

The

3.

output

the

set

to

ose

ho

c

to

and

ternal

in

the

Mo

the

Mo

hange

the

or

When

signal

on

displa

dulation

displa

dify

the

this

are

side

output

RF

Either

external power meter leveling,

or external dio de detector

leveling can be selected. When

this main menu is underscored,

the amplitude functions are

accessible

of

side

The

4.

used to select modulation t

(FM, Log AM, and pulse

modulation) and en

modify associated data. When

this main men

the modulation functions are

accessible on the right-hand

of

side

The

5.

c

ou

y

alue

v

size.

underscored,

functions

t-hand

righ

men

level

wer

o

p

d

metho

the

eling.

lev

eling,

lev

t-hand

righ

the

.

y

u

men

ter or

u is underscored,

.

y

u

men

Step

incremen

knob

4

5

*

+

main

mo

the

accessible

of

5

the

eys

k

dify

step

men

step

on

displa

of

is

lets

u

ype

is

the

y

.

used

is

u

try

en

data

The

8.

activ

t

curren

the

alue.

v

its

and

,

y

an

c

data,

dify

mo

or

b

this

reected

9.

to perform man

oriented functions. Tw

importan

keys are: c

the fron

error messages.

10.

t

used

function

4+5

decrease

dened

to

parameter in decimal steps.

in

eys

k

y

displa

The

y displa

t functions of these

hoosing/customizing

t panel and accessing

try

en

data

The

and

ter

en

to

parameters.

used

are

eys

k

parameter

a

The

steps.

decrease

increase

or

indicates

ox

b

parameter,

e

ou

y

As

hanges

x.

o

allo

y

o

eys

k

dify

mo

The

increase

to

in

knob

a

are

w

are

user

is

en

ou

y

4

*

used

external

The

13.

if

Lev

ter

ALC)

feedbac

generator

power is leveled externally.

14.

APC-3.5mm (Option 1E9)

OUPUT

generator RF output. The

UNLEVELED LED indicates

whether or not output p o

leveled.

15.

easy

5

signal

or

to/from

in

Measuremen

mainframe.

trol

Con

el

connector

path

k

when

N

e

yp

t

The

connector is the signal

Nut

Hex

The

installation/remo

generator

the

t

Automatic

oltage

v

used

is

the

to

output

RF

(standard)

Latc

dule

mo

dular

Mo

System

(EXT

as

signal

allo

h

al

v

the

or

RF

wer is

ws

the

of

vii

As shown on the previous page, the full screen mode of the HP 70004A color display mo dule is

used to illustrate the various display and signal generator \front panel" menus that you use

during front panel (manual) operation.

If you are using a display other than the HP 70004A, your displayhardkey names may

dier from those in the text of this b ook. For example, the HP 70004A instrument preset

function key is labeled \INSTR PRESET". On the other hand, some other displays label

the same preset function key \I-P". Wherever key lab els dier among mainframes/displays,

the HP 70004A label is given followed by an alternate label in parenthesis. For instance, the

INSTRUMENT PRESET key is written as

4

INSTR PRESET

5(4

I-P

5

).

Other text conventions used in this b ook follow:

signal

refers to the HP 70340A , alone, or the HP 70340A and HP 70341A

generator

MMS refers to the HP 70000 Modular Measurement System

mainframe refers to your mainframe or display (HP 70004A, HP 70205A, or HP 70206A)

4

hard key

NN

softkey

screen

5

NN

N

text

refers to keys dedicated to one function as labeled. Depending upon the

used

those

from

dier

y

displa

ok.

o

b

refers

screen.

ey

softk

refers

that

y

eys

k

to

Depending

names

text

to

ou

y

whic

ma

(other

our

y

use,

hange function

c

h

the

upon

from

dier

y

than

hard

softk

ey

k

displa

those

ey

y

lab

names

and

used

els)

ma

according to

screen

this

in

is

that

mo

b

sho

the

de

ok.

o

wn on

lab

that

el

on

y

the

ou

displa

the

use,

displa

our

y

screen

y

in

this

y

viii

The front panel functions, programming commands, pro cedures, and examples in this book

are valid whether or not the HP 70341A is installed in the MMS. In the gure below, the

HP 70340A and HP 70341A are shown installed with the HP 70205A display in a single

mainframe. Refer to the

HP 70341A Instal lation Guide

for the frequency extension module

installation procedures.

HP

and

illustrated

70341A

HP

70341A

Instal

The

Rear

panel

The

70340A

HP

anel"

P

connections

HP

rear

chapter

are

70340A

panel

of this

wn

sho

Signal

features

ok.

o

b

the

in

Generator

are

The

HP

In This Book

The \OPERATION" section of the

instructions

wing

follo

Chapter

HP 70340A installation

Chapter 2, \P

for many

hapters

c

\Installing

1,

erforming F

tasks

that you perform with the HP 70340A and HP 70341A. The

included

are

erifying

V

and

and HP 70340A/41A incoming inspection or functional v

undamental Operations",

HP 70340A/41A within the MMS en

Chapter 3, \Generating

Signals", shows y

HP 70340A/41A User's Guide

\OPERA

in

the

TION":

Signal

Generator",

vironment.

w to generate v

ou ho

FM, and pulse mo dulation and howtolevel signals.

70340A/41A

HP

the

\REFERENCE"

The

instrumen

t

features

section

and

of

functions

.

\REFERENCE"

The

70341A

and

rear

lation

describ

Frequency

panel

Guide.

con

familiarizes y

User's

Guide

section con

Extension

and

t

ron

\F

the

in

detail

ed in

the

and

provides

tains pro

70340A/41A

HP

step-by-step

cedures

for

rear

erication.

ou with basic operation of the

arious signals using log AM,

information

vides

pro

hapters:

c

these

tains

ab

out

Chapter

ecications,

sp

4,

ecications

\Sp

haracteristics,

c

Options"

and

and options.

includes

HP

70340A

and

70341A hard

HP

ix

Chapter 5, \Signal Generator Menus and Functions", describes all HP 70340A/41A softkeys,

organized by menus with asso ciated functions listed alphab etically.

Chapter 6, \DisplayFunctions", lists ma jor displaykeys and features.

Chapter 7, \Programming Commands", is a reference of all of the programming commands

that the HP 70340A recognizes.

Chapter 8, \Error Messages", contains the error messages which ag HP 70340A/41A

operation errors, and explains recovery actions for each.

Chapter 9, \Front and Rear Panel", includes hardware related to the HP 70340A and the

MMS such as LEDs, switches, and accessories.

Chapter 10, \Legal and Regulatory Information", contains safety, RFI type acceptance, SCPI

conformance, and pro duct warranty information.

x

Performing Fundamental Operations

This chapter describes basic Modular Measurement System, MMS, op erations. Its purpose is

to quickly familiarize you with the general operation of the HP 70340A and HP 70341A within

the MMS. For more detailed information, refer to the display op erating manual or the \70000

Protocol and Functional Specications" document.

Instruments that are part of the MMS have some important dierences from stand-alone

instruments. MMS instruments are composed of plug-in mo dules, the power supply is

distributed, and the mo dules communicate with each other using the Modular System

Interface Bus, HP-MSIB.

The HP 70340A is a single-module instrument because, when operating in

mo

al

c

no

needs

it

70340A mo

HP

hand,

other

the

no

vides

pro

cedures

pro

The

together

dules

mo

70340A/41A

70340A

HP-IB

mo

other

dule requires

a

is

function

this

in

during

us,

men

and

mo

dify

ecause

b

dule.

y

w

op

data

its task.

y

ou

dule

sla

as

en

e

v

a

hapter

c

ter

to complete

the displa

dule

mo

single

sho

panel

t

fron

mo

or

HP-MSIB addresses,

dule

mo

adds

it

w

ho

eration.

via

e

v

sa

When op

for

frequency

erate

op

to

cedures

Pro

the fron

recall

and

fron

t

panel

erating in

panel

the

include

instrumen

lo

trol.

con

extension

y

displa

ho

er

v

o

or

t

The

to

and

to

w

the

states,

queue.

installed,

erly

prop

dule)

accessories.

or

t

mo

With the

c

this

in

signal

hapter

generator

require

(and

additional

no

frequency

equipmen

extension

programming mode

the

er,

ev

w

ho

,

de

70341A,

HP

70340A, but,

HP

the

70340A/41A

HP

the

use

HP

the

set

bus,

error

the

read

and

cedures

pro

the

,

on

erforming

P

Fundamental

Operations

2-1

To Use the Menus

When you use the HP 70340A/41A in lo cal mo de, the

front panel

menus and functions appear

on the display screen. The main menus on the left-hand side of the display do not change.

The menus and functions on the right-hand side do change dep ending upon which menuis

selected.

Select menus from the left-hand side of the display.

A menu is underscored when it is selected.

To see which functions are asso ciated with a menu, select the menu, and examine the

functions (in uppercase) on the right-hand side of the display.You can also examine the

structure of each menuby referring to the appropriate tab (for example, Frequency) in the

\Reference" section of this book.

Select functions from the right-hand side of the display.

Functions appear in uppercase letters under main menus or submenus. For example, the

NNNNNNNNNNNNNNNNN

AMPTD

Select

Submen

the

to

FLA

for

1.

Select

2.

Select

3.

Select

function app ears under the

righ

the

from

app

the

us

lo

all

in

ear

example,

or

F

u.

CORRECTION,

N

Amptd

N

NN

N

flatnes

N

NN

N

FLATNES

N

men

N

u.

N

NN

N

corrctn

N

DATA

ercase

w

N

NN

N

submen

us

submen

TNESS

t-hand

to

N

men

N

function.

1

NNNNNNNNNNNNNNNNN

Amptd

letters.

access

w

follo

u.

main menu.

of

side

Submen

the

these

the

FLA

steps:

displa

access

us

TNESS

y

also.

,

D

more

T

A

functions

REGISTER

which

are related

function used

1

MORE

or

2

OF

men

t

these

1

u.

steps:

do

ou

y

If

function,

example,

or

F

1.

Select the

2.

Select

3.

Select the

function

the

see

not

accesses

access the

to

NN

N

Misc

it

N

main

selecting

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

MORE 1 of 2

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FM TYPE AC DC

ou

y

that

more functions

FM TYPE

seek, and

under the

DC function,

AC

there is

a

curren

follo

menu.

to access the next page of the menu.

function to choose between ACorDCFM.

MORE

w

If desired, select a main menu softkey on the left-hand side of the display in order to

functions.

and

us

men

level)

(top

main

the

to

4

our steps

y

trace

can

ou

y

. (The

bac

4

5

key is also the bac

(

kspace k

ey when y

y pressing

b

el

lev

u

men

top

the

to

k

the

ou en

(

ter data in

x.)

ely

return

,

immediately

Alternativ

many times as is necessary

the data en

try bo

3

of

1

as

5

2-2

erforming

P

Fundamental

Operations

To Enter Data with the Numeric Keypad

The display's numeric keypad combined with the units terminator softkeys provide one wayto

enter function parameters.

1.

Select a function softkey.

The function must haveanumeric value (parameter) associated with it in order to enter

new data with the numeric keypad. AMPLITUDE, FREQUENCY MULTIPLIER, and

CW FREQUENCY are examples of functions with parameters.

When you select a function that requires numeric data, its key label appears in inverse

video (highlighted) and the data entry box at the bottom of the display indicates the

function, its currentvalue, and any associated units. For example, if CW frequency is the

selected function with a currentvalue of 2 GHz, the data entry box indicates:

Frequency

2.000000000GHz

2.

Enter the desired value of the parameter by pressing the numeric keys and, if necessary,

eys.

k

typ

e

units

softk

ed

eys, the

the k

terminator

ey(s)

there

If

alue.

v

in

app

are

displa

ear(s)

no

softk

on

units

y's

ey

the

asso

data

en

to

righ

ciated

try

en

the

ter

t-hand

with

b

x

o

alue.

v

side

a

sho

of

um

n

ws

the

b

the

er,

um

n

displa

use

y

the

ers.

b

once

y

N

ENTER

N

ou

N

3.

decimal

the

Notice

Select

The

use

softk

that,

the

units terminator

umeric

n

the

to

ey

negativ

and

ou press

as y

appropriate

keypad.

the

ter

en

The

a.

b.

c.

Once

dBm.

Note

follo

Select

Press

you

output

RF

for

dBm

9

0

of

alue

v

a

ter

to en

w

ho

w

sho

steps

wing

NN

N

the

Amptd

4

and then

5

0

NN

N

the

dBm

terminate

N

NN

N

softk

the

men

4

9

ey

u whic

on the

5

to

try

en

automatically

h

umeric

n

terminate

signal

the

,

eypad.

k

en

the

generator

try

selects

.

up

dates

N

AMPTD

N

the

NN

N

the activ

as

amplitude

NNNNNNNNNNNNNNNNN

CLEAR

always appears as one of the units terminator keys so that you can

erase the data that you haveentered and return to the previous data.

amplitude:

function.

e

to

alue

v

0

9

erforming

P

Fundamental

Operations

2-3

To Modify Data with the Knob

The display's Knob is used to mo dify data. You turn the Knob in order to increase or

decrease the parameter value of the currently active function. Additionally,you can change

the Knob resolution in order to increase or decrease the rate at which the function parameter

changes.

1.

Select a function softkey.

The function must haveanumeric value (parameter) associated with it in order to enter

new data with the numeric keypad. AMPLITUDE and CW FREQUENCY are examples of

functions with parameters.

When you select a function that requires numeric data, it appears in inverse video

(highlighted) and the data entry box at the bottom of the display indicates the function,

its currentvalue, and any asso ciated units. For example, if CW frequency is the selected

function with a currentvalue of 2 GHz, the data entry box indicates:

Frequency

2.000000000GHz

decrease the

2.

T

urn

the

Knob

clo

kwise

c

increase

to

parameter

the

or

coun

terclo

kwise

c

to

parameter.

increases or

ox

b

try

en

data

the

in

When

y

decreases

ou

turn

in

steps

the

Knob,

one.

of

underscored

the

digit

or

F

data

example,

try

en

o

b

when

xsho

CW

ws:

frequency

preset

its

in

is

state

is the

and

activ

parameter,

e

the

Frequency

3.000000000GHz

steps

MHz

menu

in

on

the

left-hand

When

3.001000000,

3.

If y

ou wish

ou turn

y

the Knob

3.002000000).

hange

c

to

the

this

in

Knob

the

case,

resolution,

alue

v

select

of

CW

N

the

frequency

N

NN

N

Modify Step

hanges

c

N

side of the display.

The Modify Step menu accesses the KNOB - ->and KNOB<- - functions whichallowyou

to change the Knob resolution.

factor

a

NNNNNNNNNNNNNNNNNNNNNNNNNN

KNOB -->

underscore

the

of

ten.

of

NNNNNNNNNNNNNNNNNNNNNNNNN

KNOB <--

softkey.

N

softkey.

to

the

righ

t

one

4.

If you wish to decrease the Knob resolution, select the

N

NN

N

NN

N

Selecting

place

5.

If y

N

decimal

resolution b

in

KNOB

order

-->

decrease

to

once

mo

the

es the

v

Knob

ou wish to increase the Knob resolution, press the

osition

p

y

KNOB<|moves the decimal p osition of the underscore to the left one place in order to

increase the Knob resolution b

6.

Continue to press the

NNNNNNNNNNNNNNNNNNNNNNNNNN

KNOB -->

y a factor of ten.

NNNNNNNNNNNNNNNNNNNNNNNNNN

or

KNOB <--

softkeys until the underscore is positioned

at the desired digit.

F

in

or

order

example,

to

supp

activ

ate

ose

N

CW

that

N

FREQ

FREQUENCY is

CW

N

NN

N

and

),

ou

y

wish to

the

hange

c

curren

the

e

activ

t

resolution

function

from

(select

MHz

1

to

N

Freq

1

N

(ie.

N

2-4

erforming

P

Fundamental

Operations

GHz. (Currently the instrument is in its preset condition.) The steps that follow illustrate

how to accomplish this:

The display indicates:

Frequency

3.000000000GHz

a.

Select the

b.

Press the

position corresponding to MHz to the decimal position corresponding to GHz. The

display indicates:

Frequency

3.000000000GHz

c. Rotate the Knob slowly so that you can see the frequency change in 1 GHz steps.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Modify Step

NNNNNNNNNNNNNNNNNNNNNNNNNN

KNOB <--

softkey three times. This moves the underscore from the decimal

menu.

Note

The Knob and the Arrow Keys op erate independently of each other. The

arrow keys increase or decrease the parameter in dened steps.

erforming

P

Fundamental

Operations

2-5

To Modify Data with the ArrowKeys

The display's

1.

Select a function softkey.

4*5

and

4+5

(Arrow) Keys increase or decrease the active function's parameter.

The function must haveanumeric value (parameter) associated with it in order to enter

new data with the numeric keypad. AMPLITUDE, FREQUENCY MULTIPLIER, and

CW FREQUENCY are examples of functions with parameters.

When you select a function that requires numeric data, it appears in inverse video

(highlighted) and the data entry box at the bottom of the display indicates the function,

its currentvalue, and any asso ciated units. For example, if CW frequency is the selected

function with a currentvalue of 2 GHz, the data entry box indicates:

Frequency

2.000000000GHz

2.

Press the

4*5

key or the

4+5

key in order to increase or decrease the selected function's

parameter, respectiv ely.

ter

the

alue

v

the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Modify Step

data

the

in

alue.

v

men

en

try

u

and

b

o

3.

4.

5.

ou

If y

N

the

c

o

T

the n

Select

wish

N

NN

N

INCR

hange

umeric k

the

hange

c

to

N

function.

SET

wk

arro

the

eypad.

appropriate

arro

the

eys step

units

step

eys

k

w

en

alue,

v

terminator

v

ter

softk

alue,

the

ey

select

desired

en

to

x

then

using

no

on

units

step

The

use

softk

or

F

terminator

units

umeric

n

the

en

to

ey

example,

ter

to

eypad.

k

the

hange

c

yp

t

softk

ed

the

ey(s)

If

in

there

alue.

v

arro

app

w

are

k

ear(s)

eys

steps:

Curren

tly

indicates:

y

displa

the

,

Amplitude

XXdBm

where \XX" is the current RF output amplitude

a.

Select the

b.

Select

Now, the displa

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Modify Step

N

NN

N

the

INCR

N

NN

N

function.

SET

y indicates:

menu.

Amplitude Increment

YYdB

where YY is the curr

c.

Press

425

on the numeric keypad.

displa

The

y indicates:

ent amplitude Knob r

the

alue

v

asso

t-hand

righ

ciated

AMPTD

for

esolution

with

side

a

of

um

n

data

the

ber,

to

displa

ou

y

dB,

2

once

y

use

follo

ou

y

N

the

ENTER

w these

N

NN

2-6

Amplitude

2

erforming

P

Increment

Fundamental

Operations

d.

Select the

NNNNNNNN

dB

softkey on the right-hand side of the display in order to terminate the

entry.

The display indicates:

Amplitude Increment

2.00dB

6.

Press the

7.

If it is not already selected, select (highlight) the function of interest, again.

8.

Press the

9.

Press the

4(5

key on the display in order to exit the

4*5

key to increase the function's parameter.

4+5

key to decrease the function's parameter.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Modify Step

menu.

Note

The Knob and the Arrow Keys op erate independently of each other. The

Knob increases or decreases the underscored digit of the parameter by1.

erforming

P

Fundamental

Operations

2-7

ToSave and Recall States

When you use the signal generator for a specic application, you can save and then recall the

instrument state for future use. You can store up to ten dierent instrument states at a time.

1.

Select the

NNNNNNNNNNNNNNNNN

State

menu.

The softkey is underscored when it is selected.

2.

Select the

the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SAVE STATE

RECALL STATE

softkey if you wish to save the current instrument state, or select

softkey if you wish to recall an instrument state from memory.

The function app ears in inverse video when it is selected. The data entry b ox indicates:

Save State in Reg

X

whereXis the current register location where the instrument state will besaved.

or

Recall State from Reg

X

d.

alle

ec

er

b

l

wil

state

cation.

Use the

3.

wher

e

X

umeric

n

instrument

which

om

fr

ation

c

lo

gister

e

r

the

is

desired

the

ter

en

eypad

k

to

the

register

lo

function,

TE

A

If

9.

en

the

Note

function,

data

no

recalled.

.

try

instrumen

an

that

the

has

sa

t

previously

y

instrumen

ved

sa

een

b

es

v

recalls

t

to the

curren

the

stored

data

instrumen

the

register

instrumen

t

the

in

that

t

register

state

t

ou

y

alid register

V

4.

Press

y

If

state

purged

is

y

If

from

ecify

sp

the

ou

in the

ou

the

N

ENTER

enabled

register

when

enabled

register

instrumen

the

,

locations

N

NN

N

softk

SA

the

new

RECALL

the

that

are

ey

VE

that

data

ou

y

t preset

through

0

terminate

to

ATE

ST

selected.

ou

y

stored.

is

ST

selected.

state is

Programming Example

Use the following commands to store the instrument state to register 9 and then recall it from

register 9:

9.

gister

e

to r

store

state

instrument

d

state

719;

OUTPUT

OUTPUT 719;

"*SAV

"*RCL

9"

Saves

al

c

e

R

om

fr

the

ls

re

curr

the

gister

ent

eviously

pr

9.

instrument

2-8

erforming

P

Fundamental

Operations

To Set the HP 70340A HP-IB Address

The default factory setting of the HP 70340A HP-IB address is 19. You can, however, change

this address either by using the display front panel or by sending a SCPI command string over

the bus. The procedure for changing the HP-IB address via the front panel is describ ed here.

Note that the HP 70341A does not have an HP-IB address.

1.

Press the

2.

Select the

3.

Select

4

DISPLAY

5(4

DSP

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Address Map

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ADJUST COLUMN

5

)key on the display.

menu.

and turn the Knob clockwise to scroll through the module

addresses until you see the following highlighted box:

-------------

| 70340A |

| Signal Gen |

| HP-IB XX |

-------------

YY

ess

the

addr

default

4.

wher

Note

HP-IB

Select

e

that

address

the

XX

the

N

HP-IB

the

is

default

is

NN

N

curr

HP-MSIB

19.

N

NN

ADRSSET

ent HP-MSIB

29

is

t

for

the curr

instrumen

the

HP-IB

ent

NN

N

softk

addr

column

ey.

address

YY is

and

ess

column

while

underscored

is

ey

softk

The

ADDRESS:

HPIB

En

5.

6.

Select

7.

Press

Note

ter

the

desired

NN

ENTER

4

MENU

HP-IB

N

5

softk

ey

k

ey

in

Whether the HP-IB address is changed using the HP-IB ADDRESS function

or the SCPI command string, the address is stored in non-volatile memory.

HP

Example

70340A

HP-IB

Programming

the

oset

T

OUTPUT 719; "SYST:COMM:GPIB:ADDR 12"

when

address

to

order

address

n

en

send

umeric

try

and

instrument

the

is

it

using

terminate

return

to

selected,

the

to the

12,

Sets the HP 70340A HP-IB addr

indicates:

y

displa

the

eypad.

k

.

panel.

front

command:

wing

follo

ess to 12.

erforming

P

Fundamental

Operations

2-9

To Set the HP 70340A HP-MSIB Address

Each module in the Mo dular Measurement System must have a unique HP-MSIB address.

There are 255 legal addresses which consist of a row and a column address. The address for

the HP 70340A is preset at the factory to be Row 0, Column 29. You can, however, change

the HP-MSIB address with the address switches on the HP 70340A rear panel.

Refer to the

HP 70341A Instal lation Guide

HP-MSIB address.

Figure

The

Note

2-1

switc

hes

are

Do

ws the

sho

Conguration

bac

switc

system.

lo

HP

cated

not

of

k

hes

Figure

70340A

on

the

do

2-1.

standard

rear

the

confuse

Switches.

Graphics

set

not

The

panel

the

Displa

the

for details on howtochange the mo dule's

70340A Address

HP

Address

signal

the

of

70340A Address

HP

Display

The

for

are

y

address

of

Switc

Congur

the

the system

Switches

Conguration

h

generator.

Switc

ation

instrumen

y

displa

or an

hes

address

ymo

for

the

with

t

dule within

address

Displa

switc

.

only

hes

These

the

(0,29).

y

the

on

1.

Set switches Row1,Row2,Row 3, to set the row address of the HP 70340A.

Row 0 is the default setting for the signal generator. When a module has a Row 0 address,

error reporting and access to HP-IB are allowed.

The

signican

Legal ro

2.

Set switc

ro

w

address is

bit.

t

in

binary

where

w addresses are 0 through 8. Ho

Ro

wever, the address: Ro

signican

least

the

is

1

w

hes Column 1, Column 2, Column 3, Column 4, and Column 5 to set the column

tbit

w 0, Column

31, is illegal.

the

is

3

w

Ro

and

address of the HP 70340A.

Column 1 switc

h determines the least signican

t bit and Column 5 switc

h determines the

most signicant bit. Be certain that the address that you choose is unique among MMS

modules. For instance, if you want to set the instrument column address to decimal 19,

steps:

these

w

follo

osition.

p

1

or

on

to

h

switc

1

hto

switc

2

Fundamental

p

1

or

on

Operations

osition.

2-10

a.

b.

Column

Set

Column

Set

erforming

P

most

c. Set Column 3 switchtooor0position.

d. Set Column 4 switchtooor0position.

e. Set Column 5 switchtoonor1position.

This is the binary address \10011" whichconverts to decimal \19."

Legal column addresses are 0 through 31. However, the address: Row 0, Column 31, is

illegal.

erforming

P

Fundamental

Operations

2-11

To Check the Error Queue

When you operate the modular signal generator, you may, inadvertently, create an error

condition which causes the front panel

ERR

(Error) LED to light. Follow these steps in order

to read the front panel error queue and determine what error condition has occurred.

1.

Select the

2.

Select the

4

DISPLAY

5(4

DSP

5

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

REPORT ERRORS

)key.

softkey.

When REPORTERRORS is selected, the displayshows the mo del number, description,

and HP-MSIB address of the module that is reporting. If the HP 70340A has a row

address of \0" (the default address), and it is reporting an error, the error can b e displayed

with the REPORTERRORS function.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

3.

If necessary, press the

MORE ERRORS

softkey until the display shows

HP 70340A

, the signal

generator column address, and the errors associated with the instrument.

If the HP 70340A is the only MMS mo dule with a row address of 0, the MORE ERRORS

function will not appear.

4.

necessary

If

steps

for

Errors

errors

capital

all

asso

refer

,

correct

to

ciated

letters.

to

or

with

the

clear

the

Error

the

HP

displa

Messages

error.

70340A

(whic

y

hapter

c

wn

sho

are

usually cause

h

of

in

this

upp

to

or

ok

o

b

w

lo

and

er

an abnormal

our displa

y

er case

displa

y man

letters. Ho

sho

are

y)

ual

w

wn

ev

er,

in

5.

6.

Select

70340A

HP

the

If

Screen.

the

til

un

necessary,

If

cedure.

pro

the

error

Ho

hardw

4

MENU

screen.

a

is

ev

w

refer to

displa

5

transien

if

er,

problem

are

ey

k

y

one,

t

error

the

the \Error

order

in

is

it

corrected.

is

Messages" c

to

cleared

to hardw

exit

from

the

memory

are, it

hapter

Error

this

of

Rep

once

cannot

o

b

ort

ok

screen

ou

y

e

b

for

the Error

exit

cleared

the

return

and

Rep

memory

from

appropriate

to

reco

the

ort

v

ery

2-12

erforming

P

Fundamental

Operations

If You Encounter a Problem

If you have a problem operating the signal generator or the display,check the following list of

commonly encountered problems and troublesho oting procedures. If the problem that you

encounter is not in the following list, refer to the Troubleshooting section of the

and Verication Manual

for the MMS display module, or contact the nearest Hewlett-Packard

Installation

oce for service.

If the data entry controls (Keypad, Knob,

4*54+5

keys) do not respond:

Check that neither the ENTRY HOLD nor the HOLD function is enabled.

NNNNNNNNNNNNNN

The ENTRY HOLD function is under the

inverse video. The

4

HOLD

5

key is on the displayfront panel. To return to normal entry

Misc

menu. It is active when it appears in

mode if either of these functions is active, select (highlight) a function whichhasanumeric

parameter asso ciated with it.

Check that the function which is selected accepts data.

For instance, CW FREQ accepts data, but, AMPTD On/O does not. The data entry

it.

trols

con

Check

Press the

erating

op

underscore

no

If

Chec

The

erse

v

in

de

mo

parameter

do

that

k

ENTR

video.

either of

if

not

the

4

LCL

de.

mo

neither

Y

asso

ond

resp

ey

generator

on

ears

the

5

k

app

signal

the

HOLD

The

function

4

HOLD

these functions

ciated

with

the

if

fron

with

ENTR

ey

k

5

it.

function

is

panel

t

data

the

HOLD

Y

under

is

on

is

in

the

activ

selected

cal

lo

the

of

the

in

nor

the

displa

e,

(not

displa

data

the

N

NN

N

Misc

y

select

es

do

remote)

y

en

HOLD

N

men

fron

(highligh

not

op

return

to

b

try

function

It

u.

panel. T

t

e

v

ha

erating

x:

o

is

a

t)

data

mo

instrumen

the

enabled.

is

e

activ

return

o

function

asso

de.

when

to

ciated

whic

with

to

t

app

it

normal

has

h

lo

ears

en

a

cal

in

try

umeric

n

If data

is not

Check that the

If the HP 70340A

accepted

ERR

signal

the

y

b

LED is o.

ERR

LED is on, there is a problem with either the signal generator,

generator:

the frequency extension module, or some other component in the MMS. To determine the

error and turn o the

erforming

\P

a

is

2,

problem

Chapter

there

If

1. Refer to the displa

If the HP 70340A mo

4

DISPLAY

N

INSTR

dify

that

k

4

DISPLAY

NNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNN

NEXT INSTR

5(4

N

softk

Step

activ

the

1. Press the

2.

Select the

The

N

NN

N

the

If

Chec

ERR

LED, refer to the procedure, \To Check the Error Queue," in

undamen

F

displa

the

with

y Operating Man

dule fron

5(4

DSP

t panel men

ey.

5

)k

tal Op

y:

erations."

ual for operating and troubleshooting pro cedures.

u does not appear on the displa

y screen:

softkey until the HP 70340A front panel is displayed.

5

)key is lo cated on the front panel of the display module. The

DSP

mo

y

displa

the

of

ou

y

umeric

n

side

select

data

erforming

P

Mo

the

ciated

asso

Fundamental

dify

Step

with

lo

is

ey

functions

(selected)

e

cated

do not

the

on

ear

app

function

righ

has

t-hand

when

screen.

dule

men

it.

Operations

u:

2-13

If the signal generator does not display/output the CW FREQUENCY entered:

Check that the FREQUENCY MULTIPLIER value entered is correct.

If the FREQUENCY MULTIPLIER is a value other than 1, the resolution of the

instrumentmay not allow the exact frequency entered.

For example, if you require an ouput of 40 GHz and are using a frequency multiplier of 3,

the signal generator should output a value of 13.333333333 GHz. The closest value that the

signal generator can output, however, is 13.333333000 GHz since it has 1 kHz resolution.

Thus, the signal generator will display 39.999999000 GHz, not 40.000000000 GHz, as the

actual output at the multiplier.

Check the \Specications and Options" chapter to makesurethatyou have not set the

parameter out of the range of the sp ecication.

2-14

erforming

P

Fundamental

Operations

3

Generating Signals

This chapter provides pro cedures for generating signals with the HP 70340A (and HP

70341A.) When the term \signal generator" is used, it refers to either the HP 70340A or the

HP 70340A/41A combination.

Along with signal generation procedures, methods for performing external leveling and atness

correction are included. The steps in these procedures assume that you are familiar with

basic signal generator and display op erations. If you want to b ecome more familiar with the

Modular Measurement System, refer to the chapter, \Performing Fundamental Operations." If

you require additional programming information, refer to the

Beginner's Guide to SCPI

(HP

part number H2325-90001) or the \Programming Commands" chapter in this manual.

of

order

in

and

suggested

or

anel"

y

for

hapter.

c

these

cables,

cedures

pro

The

increasing

external

eral

Sev

cedures.

pro

the

to

refer

this

in

complexity

pieces of

procedure

h

Eac

\Accessories

try

en

hapter are,

c

.

equipment

for con

and

lists external

included)"

(not

venience,

accessories

equipmen

the

in

grouped

h

suc

that

t

ron

\F

b

cables

as

required.

is

and

t

y

task

Rear

similarit

required

are

F

P

Generating

Signals

3-1

To Generate a CW Signal

The signal generator can generate a CW (continuous wave) signal with no mo dulation

characteristics.

1.

Set the desired CW frequency.

For example, p erform the following pro cedure to set the output frequency to 2.000203 GHz.

a.

Select the

b.

Type

c.

Terminate the frequency entry by selecting the

NNNNNNNNNNNNNN

Freq

menu in order to automatically select the

4254.5405405405425405435

on the displaynumeric keypad.

NNNNNNNNNNN

GHz

softkey.

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

function.

The displaynow indicates:

Frequency

2.000203000GHz

2.

Set the desired RF output amplitude.

15.1 dBm.

to

or

F

a.

example,

Select

the

erform

p

N

NN

N

Amptd

N

NN

N

AMPTD

amplitude

N

.

cedure

pro

wing

follo

the

N

order

in

u

men

automatically

to

select

output

the

set

0

b.

c.

The

4

e

yp

T

erminate

T

displa

0

umeric

n

4

5

1

5

the

indicates:

w

4

5

.

amplitude

5

no

y

the

4

on

5

1

try b

en

pressing

y

eypad.

k

the

N

dBm

N

softk

ey

.

Amplitude

-15.10dBm

3.

Select

Note

function

4.

If the RF Output is o, turn it on by selecting

When the RF output is on, the display indicates

5.

If necessary, turn o any mo dulation: LOG AM, FM, or PUSLE MODULATION by

selecting the

N

ALC

that

eling.

lev

the ALC

INTERNAL

so that On is underscored.

ma

INT

ternal

in

y

so

lev

already

that

eling

b

is

it

is

selected.

e

underscored

default

the

in

yp

t

N

lev

N

eling.

N

enable in

N

order to

of

e

AMPTD On Off

RF ON

ternal

us,

Th

N

NN

N

.

Modulation menu and then pressing each function softkey so that O is

NN

N

underscored.

underscoring

y

Whether

LOG

FM,

AM,

in the asso ciated softkey

PULSE

and

. The displa

indicated

is

o

on or

are

y also indicates whic

b

h mo dulation t

ypes are on or

On

or

O

o.

3-2

Generating

Signals

Programming Example

In the following example, an internally leveled, CW signal will be generated at a frequency of

2.000203 GHz with a power level of015.1 dBm.

10 OUTPUT 719; "*RST"

20 OUTPUT 719; "FREQ 2.000203GHZ"

30 OUTPUT 719; "POW:LEV015.1DBM"

40 OUTPUT 719; "OUTP:STAT ON"

50 OUTPUT 719; "POW:ALC:SOUR INT"

60 END

Sets the instrument to a preset state.

Sets the output frequency to 2.000203 GHz.

Sets the output power level to015.1 dBm.

Turns the RF output on.

Enables internal leveling.

Generating

Signals

3-3

To Generate an AC FM Signal

You can generate an AC coupled frequency modulated (AC FM) signal at any carrier

frequency within the signal generator output frequency range. AC coupling is useful when the

modulating signal has a minimum rate of greater than 1 kHz in order to achieve frequency

accuracy and stability.

Generating an AC FM signal requires the following external equipment.

Equipment Requirements

Modulating Signal

Source

Modulating signal level must b e in the

range of +2V to02V for sp ecied FM

performance.

signal

imp

sho

AC

wn

.

3-1.

edance

in

to

Figure

dulating

mo

Caution

1.

Connect

2.

Select

3.

Select the

4.

Set FM coupling to AC, if necessary.

erform

P

a.

Select

b.

Select

c.

Set

5.

Turn frequency mo dulation on.

The

ccur.

o

equipmen

the

N

NN

N

the

Amptd

men

NNNNNNNNNNNNNNNNNNNNNNN

ALC INT

wing

follo

the

N

NN

N

the

NNNNNNNNNNN

men

Misc

NNNNNNNNNNNNNNNNNNNNNNNN

MORE 1 of 2

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNN

NNNNNNNNNNN

FM TYPE AC DC

input

as

t

u.

function in order to enable internal leveling.

cedure

pro

u.

to see more functions.

to

To turn FM on, perform the following steps:

N

FM

the

N

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

N

NN

N

Off

On

u.

men

N

On

.

a.

b.

Select

urn

T

FM

C

A

nev

ust

m

of

Figure

FM coupling

set

Equipment

exceed

er

EXT

the

:

3-1

6

FM

to

Setup

10V

A

damage

or

connector

C.

to

is 600.

the

input

can

3-4

When

frequency

Generating

mo

Signals

dulation

turned

is

on,

the

displa

.

ON

FM

ws:

sho

y

6.

If necessary, turn o unwanted mo dulation: LOG AM, or PULSE MODULATION by

selecting each function softkey so that O is underscored.

Whether LOG AM and PULSE are on or o is indicated by underscoring

OnorO

softkey. The display also indicates which modulation types are enabled or disabled.

7.

Set the desired carrier frequency.

For example, p erform the following procedure to set the carrier frequency to 12.5 GHz.

a.

Select the

b.

Type

c.

Terminate the carrier frequency entry by pressing the

NNNNNNNNNNNNNN

Freq

4154254.5455

menu in order to automatically select the

on the displaynumeric keypad.

NNNNNNNNNNN

GHz

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

softkey.

function.

The displaynow indicates:

Frequency

12.500000000GHz

8.

Set the desired RF output amplitude.

0

5

N

function.

to

or

F

a.

b.

c.

The

Select

T

example,

the

4

e

yp

0

erminate

y

displa

4

5

no

erform

p

N

NN

Amptd

on

5

the

indicates:

w

follo

the

N

the

men

displa

u

amplitude

in

wing

order

y

try

en

umeric

n

by

cedure

pro

automatically

to

eypad.

k

pressing

to

the

set

N

dBm

the

select

N

output

the

softk

amplitude

NN

AMPTD

.

ey

N

in the

dBm:

Amplitude

5.00dBm

0

haracteristics.

c

9.

10.

the

Set

If the

When

dulating

mo

RF Output

output

RF

the

signal

is o,

is

turn

on,

source to

on

it

displa

the

the desired

pressing

y

b

indicates

y

FM

N

NN

N

AMPTD On

ON

RF

N

Off

that On

so

underscored.

is

N

.

Programming Example

In the following example, an internally leveled, AC coupled FM signal will be generated at

the

this,

desired

12.5

carrier

a

connect

haracteristics,

c

FM

frequency

the equipmen

of

and

as

t

10 OUTPUT 719; "*RST"

20 OUTPUT 719; "FM:COUP AC"

30 OUTPUT 719; "FM:STAT ON"

40 OUTPUT 719; "POW:ALC:SOUR INT"

50 OUTPUT 719; "FREQ 12.5GHZ"

60 OUTPUT 719; "POW:LEV05DBM"

70 OUTPUT 719; "OUTP:STAT ON"

GHz

sho

then

of

el

lev

er

w

po

a

with

the

set

,

wn

run

Figure

in

the

Sets the

Sets FM c

Turns fr

3-1

following

instrument to pr

oupling to A

equency

program.

C.

modulation on.

Enables internal leveling.

Sets the c

arrier fr

equency to 12.5 GHz.

Sets the output amplitude to05dBm.

Turns the RF output on.

dBm.

5

0

modulating

eset state.

In

to accomplish

order

signal

source

for

80 END

Generating

Signals

3-5

To Generate a Power Sweep

The signal generator can generate a power sweep by connecting the output of a function

generator to the

EXT AM

connector and mo dulating the RF output with a sawtooth wave.

This has the eect of linearly sweeping the power level of the RF output from a lower power

level value to a higher power level value (or vice versa) at a regular interval.

Generating a power sweep requires the following external equipment.

Equipment Requirements

Function Generator Must be capable of producing a sawtooth

signal from a minimum of 0 volts to a

maximum up to +6 volts, depending on

the amount of attenuation required in

the power sweep.

Setup

the range

input

The

+15.5V

of

imp

to

edance

15.5V

0

of

Caution

Connect

1.

2.

Select the

the

N

Amptd

N

oth

wto

sa

The

the

connector

N

to

as

t

damage

AM

equipmen

N

menu and then the

Figure

signal

EXT AM

k.

5

is

wn

sho

3-2.

m

in

ust

AM

Log

nev

input can

Figure

N

ALC INT

Equipment

exceed

er

ccur.

o

3-2.

NN

N

function in order to enable internal

leveling.

3.

Select the

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

menu and then

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

LOG AM On Off

in order to turn logarithmic

amplitude mo dulation on.

.

ON

AM

MODULA

TION

ey so that O is

y selecting

b

underscored.

an

AM is

mo

y

When

If

4.

Modulation men

The displa

5.

Set the desired carrier frequency

LOGARITHMIC

turn o

necessary

,

y indicates whic

u and then pressing eac

displa

the

on,

dulation:

FM

h mo dulation t

.

indicates:

y

PULSE

or

h function softk

ypes are on or o.

For example, p erform the following pro cedure to set the carrier frequency to 12.5 GHz.

a.

Select

the

NNNNNNNNNNNNNN

Freq

men

automatically

to

order

in

u

select

the

NNNNNNNNNNNNNNNNNNNNNNN

FREQ

CW

function.

the

or

EXT

the

b.

c.

3-6

4

e

yp

T

5

1

erminate

Generating

4

5

2

.

the

Signals

4

5

carrier

on

the

displa

frequency

n

y

en

umeric

b

try

eypad.

k

pressing

y

the

N

NN

N

GHz

N

softk

ey

.

The displaynow indicates:

Frequency

12.500000000GHz

6.

Set the desired RF output amplitude to the highest value needed for the p ower sweep.

For example, if the power is to sweep from030 dBm to05 dBm, perform the following

procedure to set the output amplitude to05dBm.

a.

Select the

b.

Type

c.

Terminate the amplitude entry by pressing the

NNNNNNNNNNNNNNNNN

405455

Amptd

menu in order to automatically select the

on the displaynumeric keypad.

NNNNNNNNNNN

dBm

softkey.

NNNNNNNNNNNNNNNNN

AMPTD

function.

The displaynow indicates:

Amplitude

0

5.00 dBm

7.

Set the controls of the function generator for a sawtooth waveform (see Figure 3-3) that

eep.

sw

er

w

o

pro

duces

the

desired

p

EXT

the

at

olt

v

+1

ery

ev

or

F

eform

v

a

w

wing

follo

from

w

o

p

slop

eform.

to

the

er

that

the

sw

e

0

eep

of

\Sp

dBm to

5

v

can

wto

sa

the

duces

pro

ecications

ary

a

0

from

oth

linear

30

and

example,

linearly

The

the

on

veform

a

w

v

a

w

Refer

Figure

8.

If the RF output is o, turn it on b

AM

dBm

a

v

wa

Options"

3-3.

connector,

the

at

ery

ev

er

w

lo

eform.

er

w

o

p

Example

y pressing

EXT

100

to

Note

eep

sw

The

AM

connector

ms.

a higher

that

ends

dep

Sa

for

wtooth

hapter

c

NNNNNNNNNNNNNNNN

AMPTD On Off

output

RF

w

o

p

maxim

on

the

W

NNNNNNNNNNNNNNNNNNNNNN

er

um

the

actual

v

a

alue

v

eform

10 dB.

RF

v

of

output

ersa,

the

by

dep

sa

of

to

ending

wto

the

attenuated

is

causes the

vice

or

frequency

oltage

v

excursion

limitation.

so that On is underscored.

sw

oth

For

eep

When the RF output is on, the displa

y indicates

RF ON

.

Generating

Signals

3-7

Programming Example

In the following example, a p ower sweep will be generated at a carrier frequency of 2.3 GHz.

The power will sweep from a minimum level of030 dBm to a maximum level of05 dBm.

To program the signal generator to generate the power sweep explained above, connect the

equipment as in the ab ove procedure. Set the function generator to generate a sawtooth

waveform similar to that in Figure 3-3, and then run the following program.

10 OUTPUT 719; "*RST"

20 OUTPUT 719; "AM:STAT ON"

30 OUTPUT 719; "POW:ALC:SOUR INT"

40 OUTPUT 719; "FREQ 2.3GHZ"

50 OUTPUT 719; "POW:LEV05DBM"

60 OUTPUT 719; "OUTP:STAT ON"

70 END

Sets the instrument to preset state.

Turns logarithmic amplitude modulation on.

Enables internal leveling.

Sets the carrier frequency to 2.3 GHz.

Sets the output amplitude to05 dBm (the max-

imum level needed in the power sweep).

Turns the RF output on.

3-8

Generating

Signals

To Generate Internal Pulse Modulation

If your instrument has Option 1E2, you can generate a pulse mo dulated signal at any

carrier frequency within the signal generator output frequency range. When internal pulse

modulation is used, the pulsed RF output signal will have pulse width, delay, and pulse

repetition frequency parameters set via the signal generator front panel.

1.

Set the desired carrier frequency.

For example, p erform the following procedure to set the carrier frequency to 3.085 GHz.

a.

Select the

b.

Type

c.

Terminate the carrier frequency entry by selecting the

2.

Set the desired RF output amplitude level.

example,

or

F

a.

Select

NNNNNNNNNNNNNN

Freq

4354.5405485455

erform

p

N

the

Amptd

menu in order to automatically selcet the

on the signal generator numeric keypad.

cedure

pro

wing

follo

the

NN

N

men

uin

order to

automatically select

to

set

the

NNNNNNNNNNN

GHz

output

N

AMPTD

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

softkey.

amplitude

NN

N

.

function.

0

to

26

dBm.

b.

c.

3.

Select

4.

the

If

on.

When

necessary

If

5.

and

The display indicates which modulation types are on or o.

6.

Select

internal pulse modulation on.

When in

Pulse

Set

7.

For example, p erform the following procedure to set the pulse repetition in

a.

4

e

yp

T

erminate

T

N

RF

the

then pressing

NNNNNNNNNNNNNNNNNNNNNNN

Internal

the

Select

4

5

0

N

INT

ALC

output

RF

turn

,

Modultn

ternal pulse modulation is turned on, the display indicates

desired

NNNNNNNNNNN

PRI

on

5

2

6

o

p

the

N

NN

N

enable

to

curren

is

output

o

each

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

pulse modultn

.

pulse

.

signal

the

lev

er

w

tly

on,

is

modulation:

y

an

function softk

etition

rep

el

ternal

in

RF

generator

y

b

try

en

leveling.

turned

ON

o,

app

ey so

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

intern pulse

terv

in

n

pressing

select

in

ears

FM or

that

(PRI).

al

umeric

the

LOG AM

eypad.

k

N

the

GHz

N

NN

N

Amptd

displa

underscored.

is

O

, and, then,

NN

softk

and

.

y

by

.

ey

N

then

AMPTD

selecting

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

INTERN PULSE

N

NN

N

the

N

NN

N

Off

On

dulation

Mo

to turn

terval to 100 ms.

to

turn

men

it

u

b.

ype

4

T

c.

Terminate the pulse repetition frequency entry by pressing the

the

Set

8.

example,

or

F

ms.

25

4

5

1

0

desired

4

on the signal generator n

5

0

width.

pulse

wing

follo

erform

p

the

pro

umeric k

cedure

to

eypad.

set

the

pulse

NNNNNNNNNNN

GHz

width to

Generating

softkey.

Signals

3-9

a. Select

b.

Type

c.

Terminate the pulse width entry by pressing the

9.

Set the desired pulse delay.

PULSE WIDTH

425455

on the signal generator numeric keypad.

.

NNNNNNNNNNN

GHz

softkey.

For example, p erform the following pro cedure to set the pulse delayto200s.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

a.

Select

b.

Type

c.

Terminate the pulse delayentry by pressing the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE DELAY

425405405

on the signal generator numeric keypad.

.

NNNNNNNNNNN

MHz

softkey.

The signal generator will produce a pulsed RF output signal with pulse width, delay, and

pulse repetition frequency parameters set via the front panel.

p

erage

v

a

us

to

and

unctions"

F

Note

the

If

sensitiv

hapter

c

signal

circuitry

e

of

generator

man

this

refer

,

ual.

pulsed

PWR

to

RF

output

LIM

to

is

On/O

connected

e

b

the

in

\Men

er

w

o

Programming

follo

the

In

generated

pulse

e

v

ha

OUTPUT

10

OUTPUT

20

30 OUTPUT

OUTPUT

40

OUTPUT

50

Example

wing example,

at

rep

carrier

a

etition

719;

frequency

in

"*RST"

"PULM:SOUR

719; "TRIG:SOUR

"PULM:STAT ON"

719;

"POW:ALC:SOUR

719;

terv

an

al

INT"

IMM"

60 OUTPUT 719; "FREQ 3.085GHZ"

70 OUTPUT 719; "POW:LEV026DBM"

80 OUTPUT 719; "POW:PROT:STAT ON|OFF"

90 OUTPUT 719; "PULS:PER 100MS"

100 OUTPUT 719; "PULS:WIDT 25MS"

110 OUTPUT 719; "PULS:DEL 200US"

120

130

OUTPUT

END

719;

"OUTP:STAT

ON"

ternally

in

of

100

of

INT"

mo

pulse

er

w

o

p

a

pulse

ator.

gener

to internal.

e

c

sour

leveling.

el

lev

width

imme

to

3.085

ms

Pr

Sets

trigger

Turns

Enables

lev

GHz

with

esets

eled,

a

the

pulse

d).

e

pulse mo

internal

ternally

in

with

25 ms

signal

sour

trigger

c

e

dulation on.

Sets the carrier frequency to 3.085 GHz.

Sets the output amplitude to026 dBm.

Turns average power inhibit on or o.

Sets the pulse repetition interval to 100 ms.

Sets the pulse width to 25 ms.

Sets the pulse delay to 200s.

on.

output

RF

the

urns

T

dulated

0

of

and

diate

26

a

(non-

signal

dBm.

200

e

b

will

pulses will

The

.

y

dela

s



3-10

Generating

Signals

Related Tasks

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PWR LIM On Off

To Generate Externally Triggered Pulse Modulation

To Generate External Pulse Mo dulation

To Generate a Doublet Pulse

To Generate Gated Pulse Mo dulation

To Generate Simultaneous Log AM and Pulse Mo dulation

Generating

Signals

3-11

To Generate Externally Triggered Pulse Modulation

If your instrument has Option 1E2, you can generate an externally triggered, pulse mo dulated

signal at any carrier frequency within the signal generator output frequency range. When

externally triggered pulse mo dulation is used, a valid TTL level trigger signal at the

PULSE/TRIG, GATE IN

connector will cause pulsed RF to appear at the

RF OUTPUT

connector with pulse width and delay set with the PULSE WIDTH and PULSE DELAY

functions.

Generating externally triggered, pulse modulated signals requires the following external

equipment.

Equipment Requirements

Trigger Signal Source Must b e capable of sourcing a TTL level

signal into a 50 load.

Caution

Connect

1.

The trigger signal must never exceed the range of +5.5V to00.5V or damage

to the

the

PULSE/TRIG, GATE IN

shown

equipmen

tas

in

Figure

input can occur.

:

3-4

Figure 3-4. Externally Triggered Pulse Modulation Equipment Setup

2.

Set the desired carrier frequency.

For example, p erform the following procedure to set the carrier frequency to 5 GHz.

N

NN

N

a.

Select

the

NN

N

Freq

N

to automatically

order

on

u

men

N

select

N

CW

N

NN

N

FREQ

N

.

b.

c.

3.

Set the desired RF

4

Type

5

on the signal generator n

5

Terminate the carrier frequency en

output amplitude lev

umeric k

try b

eypad.

y selecting the

el.

NNNNNNNNNNN

GHz

softkey

.

For example, p erform the following procedure to set the output amplitude to05 dBm.

3-12

a.

Select the

b.

yp

T

c.

erminate

T

Generating

NNNNNNNNNNNNNNNNN

Amptd

4

e

4

5

0

5

the

menu in order to automatically select

umeric

the

n

N

GHz

N

softk

on

en

the

try

signal

selecting

y

b

generator

eypad.

k

.

ey

Signals

NNNNNNNNNNNNNNNNN

AMPTD

.

4.

Select

5.

If the RF output is currently turned o, select

NNNNNNNNNNNNNNNNNNNNNNN

ALC INT

to enable internal leveling.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

to turn it on.

When the RF output is on,

6.

If necessary, turn o any modulation: FM or LOG AM by selecting the Modulation menu

RF ON

appears in the display.

and then pressing each function softkey so that O is underscored.

The display indicates which modulation types are on or o.

7.

Select

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

pulse modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

trigger pulse

, and then

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

TRIG PULSE

to turn

externally triggered internal pulse mo dulation on.

When externally triggered internal pulse mo dulation is turned on, the display indicates

Pulse Internal Trigger

8.

Set the desired pulse width.

.

For example, p erform the following procedure to set the pulse width to 23 ms.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE WIDTH

4

e

yp

5

2

erminate

desired

the

example,

N

PULSE

4

on

5

3

the pulse

pulse

erform

p

N

the

N

NN

N

DELAY

N

.

signal

width en

y

dela

follo

the

N

.

generator

.

wing

try

y

b

pro

numeric

cedure

selecting

keypad.

the

set the

to

N

GHz

N

softk

pulse

ey.

dela

s.



100

to

y

9.

a.

b.

c.

Set

or

F

a.

Select

T

Select

10.

b.

c.

Set

e

yp

T

erminate

T

the con

4

5

1

trols of

umeric

y

en

signal

generator

b

try

5

0

pulse

the signal

on

dela

4

5

0

the

the trigger

selecting

y

source

n

to

eypad.

k

N

the

MHz

generate

N

softk

the

.

ey

desired

external

pulse

trigger

signal.

When the signal generator receives a valid trigger signal from the trigger signal source, an

RF pulse will appear at the signal generator

RF OUTPUT

connector with width and delay

parameters set with the PULSE WIDTH and PULSE DELAY functions. For example, if the

width

result with

will

has

b

een

set

a

alid

v

to

ms

23

trigger

and dela

signal.

Figure

shown

pulse

the

s,



100

to

set

een

b

has

y

in

3-5

Generating

Signals

3-13

Figure 3-5. Triggered Pulse Mode Timing Example

Note

If the signal generator pulsed RF output is to be connected to average p ower

sensitive circuitry, refer to PWR LIM On/O in the \Menus and Functions"

chapter of this manual.

wing

23

the

sho

as

719;

ms

and

Example

example,

carrier

a

at

pulse width

signal

generator

wn in

then

"*RST"

"PULM:SOUR

"TRIG:SOUR

"PULM:STAT

"POW:ALC:SOUR

"FREQ 5GHZ"

"POW:LEV

"POW:PROT:STAT

Programming

In the

will

T

equipmen

c

follo

generated

e

b

a

e

v

ha

program

o

t

haracteristics,

OUTPUT

10

OUTPUT

20

OUTPUT

30

40 OUTPUT

OUTPUT

50

OUTPUT 719;

60

OUTPUT 719;

70

OUTPUT

80

90 OUTPUT 719; "PULS:WIDT 23MS"

100 OUTPUT 719; "PULS:DEL 100US"

110 OUTPUT 719; "OUTP:STAT ON"

120 END

an

Figure

run

INT"

EXT"

ON"

5DBM"

0

ternally

in

frequency

and a

generate

to

set

,

3-4

follo

the

INT"

ON|OFF

"

externally

eled,

lev

p

a

with

GHz

5

of

.

y

dela

s



100

the

wing

esets

Pr

Sets

Enables

urns

T

Enables

Sets the

Sets

urns

T

signal

the

trigger

program.

signal

the

sour

pulse

trigger

mo

pulse

internal

carrier

output

the

age

aver

signal

gener

internal.

to

e

c

d pulse

e

dulation

leveling.

quency

e

fr

amplitude

ower

p

explained

source

ator.

mode.

inhibit

Sets the pulse width to 23 ms.

Sets the pulse delay to 100s.

Turns the RF output on.

triggered

er lev

ow

for

on.

GHz.

5

to

dBm.

5

0

to

or

on

el

abo

the

o.

pulse

of

e,

v

desired

mo

dBm.

5

0

connect

dulated

The

the

triggering

signal

pulses

asks

N

PWR LIM

To Generate In

T

N

NN

N

NN

N

NN

N

On Off

ternal

Pulse Mo dulation

To Generate External Pulse Modulation

To Generate a Doublet

Pulse

To Generate Gated Pulse Modulation

To Generate Simultaneous Log AM and Pulse Modulation

3-14

Generating

Signals

To Generate External Pulse Modulation

You can generate a pulse modulated signal at any carrier frequency within the signal

generator output frequency range. When external pulse mo dulation is used, the pulsed RF

output signal has pulse width and repetition frequency parameters set via an external pulse

source.

Generating external pulse modulation requires the following external equipment.

Equipment Requirements

Pulse Source Must be capable of sourcing a TTL level

signal into a 50 load.

the

en

Setup

range of

a

to

in

try

+5.5V

erage

v

the

\Men

signal

circuitry

e

t

3-6.

mo

to

generator

hapter

c

as

Figure

pulse

Caution

Note

The

damage

or

the

If

sensitiv

unctions"

F

equipmen

Connect

1.

2.

Set the desired carrier frequency.

the

External

dulating

EXT PULSE

the

refer

,

of

wn

sho

Pulse

signal

pulsed

the

to

b

this

Figure 3-6

in

Modulation

ust

m

input

Output

RF

PWR

ok.

o

.

nev

er

can

LIM

Equipment

exceed

ccur.

o

connected

is

On/O

For example, p erform the following procedure to set the carrier frequency to 2.5 GHz.

4

5

2

yno

4

.

NNNNNNNNNNNNNN

Freq

menu in order to automatically select the

4

5

the

on

5

w indicates:

displa

a.

Select the

b.

c.

e

yp

T

Terminate the carrier frequency en

The displa

umeric k

n

y

eypad.

y selecting the

try b

N

NN

N

GHz

N

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

N

softkey

function.

.

Frequency

2.500000000GHz

0.5V

0

to

er

w

o

p

and

us

3.

Set the desired RF output amplitude.

wing

follo

N

on

the

N

men

displa

the

order

in

u

y

F

a.

b.

or

example,

Select

4

e

yp

T

the

0

5

erform

p

NN

N

Amptd

4

5

umeric

n

cedure

pro

automatically

to

eypad.

k

to

set

the

select

output

the

amplitude

N

NN

N

AMPTD

Generating

0

to

function.

dBm:

5

Signals

3-15

c.

Terminate the amplitude entry by selecting the

4.

Select the

5.

Set the controls of the pulse source to the desired pulse PRF and width.

6.

If the RF output is o, turn it on by selecting

NNNNNNNNNNNNNNNNNNNNNNN

ALC INT

function in order to enable internal leveling.

NNNNNNNNNNN

dBm

softkey.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

.

When the RF output is on, the display indicates

7.

If necessary, turn o anyunwanted mo dulation: LOG AM or FM by selecting the

Modulation menu and then selecting each function softkey so that O is underscored.

Whether LOG AM and FM are on or o is indicated by underscoring

softkey. The display also indicates which modulation types are on or o.

8.

If your instrumentdoesnothave Option 1E2:

a.

Select

The display indicates

b.

Select normal (noninverted) or inverted pulse modulation with the

function.

The

message:

our

y

If

9.

a.

Select

b.

Select

in

The

message:

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

displa

instrumen

the

N

EXTERN

erted

v

displa

y

Pulse

N

Modultn

N

NN

N

pulse

y

Pulse

and then

indicates

External

con

t

N

NN

N

NORMAL

dulation.

mo

indicates

External

tains

N

NN

N

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE On Off

Pulse Off

whether

or

Option

and

u

men

N

whether

or

N

EXTERN

or

when pulse modulation is o.

External

1E2:

N

INVERT

External

or

N

or

normal

Pulse

then the

N

NN

N

normal

Pulse

RF ON

.

to turn pulse mo dulation on.

dulation

mo

pulse

erted

v

in

.

N

to

ho

c

mo

.

men

u.

et

b

ose

dulation

N

pulse

N

NN

v

in

Inverted

N

NN

N

modultn

order

in

erted

Inverted

N

pulse

OnorO

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE Nml Inv

y

b

on

is

normal

een

w

y the

b

on

is

in the

the

and

external

erted

v

in

if

that

Note

b

erted

v

in

is

signal

signal.

The signal generator now produces a pulsed RF output signal with pulse width and repetition

frequency parameters that are set with an external pulse source.

Programming

In the following

generated at a carrier frequency of 12.02 GHz with a po

characteristics (PRI, width) will

To program the signal generator to generate the signal explained

equipment as sho

width, and then run the following program.

3-16

sense

OUTPUT

10

OUTPUT

20

OUTPUT

30

Generating

Example

example, an in

wn in the abo

"*RST"

719;

"PULM:SOUR

719;

"PULM:EXT:POL

719;

Signals

EXT"

pulse

aecting

efore

ternally lev

be set with an external pulse source.

ve procedure, set the pulse source for the desired PRI and

NORM|INV

the

eled, externally pulse modulated signal will be

the

Sets

pulse

Sets

external

Sets

"

non-inverte

for

\INV"

dulation

mo

is

elope

v

en

instrument

c

sour

pulse

inverte

for

to

e

external

d

of the

wer lev

eset

pr

to

external.

olarity.

p

external

pulse mo

el of

above, connect the

state.

Cho

mo

pulse

external

the

used,

pulse

dulated

0

25 dBm. The pulse

\NORM"

ose

dulation

dulation.

mo

RF

or

output

dulating

mo

40 OUTPUT 719; "PULM:STAT ON"

50 OUTPUT 719; "POW:ALC:SOUR INT"

60 OUTPUT 719; "FREQ 12.02GHZ"

70 OUTPUT 719; "POW:LEV025DBM"

80 OUTPUT 719; "OUTP:STAT ON"

90 END

Related Tasks

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PWR LIM On Off

To Use External Dio de Detector Leveling

To Generate Externally Triggered Pulse Modulation

To Generate a Doublet Pulse

To Generate Gated Pulse Mo dulation

To Generate Simultaneous Log AM and Pulse Mo dulation

Turns pulse modulation on.

Enables internal leveling.

Sets the carrier frequency to 12.02 GHz.

Sets the output amplitude to025 dBm.

Turns the RF output on.

Generating

Signals

3-17

To Generate a Doublet Pulse

If your instrument has Option 1E2, you can generate a doublet pulse at any carrier frequency

within the signal generator output frequency range. When a doublet pulse is generated, the

signal generator will generate two RF pulses. The envelope of the rst RF pulse will follow

avalid (TTL high) pulse provided at the

PULSE/TRIG, GATE IN

connector. The second

RF pulse is generated internally and will have a pulse width and pulse delay as set with the

PULSE WIDTH and PULSE DELAY functions.

Generating doublet pulses requires the following external equipment.

Equipment Requirements

Pulse Source Must be capable of sourcing a TTL level

signal into a 50 load.

Caution

Connect

1.

2.

Set the desired carrier frequency.

The pulse modulating signal must never exceed the range of +5.5V to00.5V

or damage to the

equipmen

the

t

Figure

PULSE/TRIG, GATE IN

Figure

in

wn

sho

as

3-7.

Doublet

Pulse

:

3-7

Equipment

input can o ccur.

Setup

For example, p erform the following procedure to set the carrier frequency to 10 GHz.

a.

Select the

NNNNNNNNNNNNNN

Freq

u in order to automatically select the

men

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

function.

b.

c.

3.

Set the desired RF output amplitude lev

4

e

yp

T

4

on

5

1

0

the

signal

Terminate the carrier frequency

generator n

umeric

entry b

y selecting the

el.

eypad.

k

N

GHz

N

NN

N

softkey

For example, p erform the following procedure to set the output amplitude to

Amptd

4

5

o

p

the

N

to

Signals

N

menu in order to automatically select the

eypad.

the

k

N

GHz

N

NN

N

softk

the

on

er

w

enable

signal

lev

in

en

el

ternal

generator

y

b

try

eling.

lev

numeric

selecting

NNNNNNNNNNNNNNNN

AMPTD

.

ey

4.

3-18

a.

Select the

b.

yp

T

c.

erminate

T

N

Select

Generating

4

e

N

ALC

N

0

N

5

N

NNNNNNNNNNNNNNNN

4

2

N

NN

N

INT

.

N

function.

0

25 dBm.

5.

If the RF output is currently turned o, select

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

to turn it on.

When the RF output is on,

6.

If necessary, turn o anyunwanted mo dulation: LOG AM or FM by selecting the

RF ON

appears in the display.

Modulation menu and then selecting each function softkey so that O is underscored.

Whether LOG AM and FM are on or o is indicated by underscoring

OnorO

softkey. The display also indicates which modulation types are on or o.

7.

Select

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

pulse modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

doublet pulse

, and then

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

DOUBLET PULSE

doublet pulse mo de.

When doublet pulse mode is turned on, the text \

8.

Set the desired pulse width.

Pulse Doublet

" appears in the display.

For example, p erform the following procedure to set the pulse width to

1s.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE WIDTH

4

e

on

5

1

desired

N

the

PULSE

the

pulse

erform

p

N

NN

N

signal

pulse

N

width

dela

the

NN

N

DELAY

softkey.

generator

en

.

y

wing

follo

N

softk

try

ey

umeric

n

y

b

pro

.

eypad.

k

selecting

cedure

to

the

set

NN

MHz

the

N

softk

pulse

.

ey

dela

s.



2

to

y

9.

a.

Press the

b.

yp

T

c.

erminate

T

the

Set

example,

or

F

a.

Press

in the

to turn on

10.

Dela

dela

b.

c.

Set

y

is

time,

4

e

yp

T

erminate

T

con

the

measured

ou

y

5

2

on

the

trols

can v

the

of

from

ary the

signal

pulse

the

generator

y

dela

pulse

rising

o time

try b

en

source

edge

bet

umeric

n

y selecting

generate

to

the

of

een

w

eypad.

k

input

the

N

the

MHz

desired pulse.

the

pulse.

pulses.

o

w

t

N

By v

softk

.

ey

arying the

is

This

signal generator

useful

when

testing

receiver recovery time (shadow time). For example, if the width has been set to 1s and

delay has been set to 2s, the pulses shown in Figure 3-8 will result upon a 500 ns gate

signal.

Figure

3-8.

Doublet

Pulse Mode

Timing

Example

Generating

Signals

3-19

Note

If the signal generator pulsed RF output is to be connected to average p ower

sensitive circuitry, refer to PWR LIM On/O in the \Menus and Functions"

chapter of this manual.

Programming Example

In the following example, doublet pulses will be generated at a carrier frequency of 10 GHz

with a p ower level of025 dBm. The pulses will havea1s pulse width and a pulse delayof2



s.

To program the signal generator to generate the pulses explained above, connect the

equipment as shown in Figure 3-7, set the gate signal source for the desired gate pulse

characteristics, and then run the following program.

10 OUTPUT 719; "*RST"

20 OUTPUT 719; "PULM:SOUR INT"

30 OUTPUT 719; "PULS:DOUB ON"

40 OUTPUT 719; "PULM:STAT ON"

50 OUTPUT 719; "POW:ALC:SOUR INT"

10GHZ"

"FREQ

OUTPUT

60

OUTPUT

70

OUTPUT 719;

80

OUTPUT

90

100

110

120

719;

OUTPUT 719;

OUTPUT

719;

END

25DBM"

"POW:LEV

0

"POW:PROT:STAT ON|OFF

"PULS:WIDT

"PULS:DEL

"OUTP:STAT

1US"

2US"

ON"

Presets the signal generator.

Sets pulse source to internal.

Enables doublet pulse mode.

Turns pulse modulation on.

Enables internal leveling.

e

fr

arrier

c

the

Sets

amplitude to

output

the

Sets

pulse

RF

power

width

delay

output

average

Turns

"

the

Sets

the

Sets

the

urns

T

quency

inhibit

to 1

2

to

on.

GHz.

10

to

dBm.

0

25

o.

or

on



s.



Related T

N

PWR

o

T

o

T

o

T

To

asks

N

LIM

Generate

Off

On

ternal

In

Externally

External Pulse

N

NN

N

Generate Gated

N

Pulse

Mo

riggered

T

Modulation

dulation

Mo

dulation

Pulse

dulation

Mo

To Generate Simultaneous Log AM and Pulse Modulation

3-20

Generating

Signals

To Generate Gated Pulse Modulation

If your instrument has Option 1E2, you can generate a gated, pulse mo dulated signal at

any carrier frequency within the signal generator output frequency range. When gated

pulse mo dulation is used, a valid TTL level gate signal at the

connector will cause pulsed RF to appear at the

RF OUTPUT

PULSE/TRIG, GATE IN

connector as long as the gate

signal remains at a TTL high level. The pulsed RF output will have a pulse width and pulse

repetition frequency as set with the PULSE WIDTH and PRF (or PRI) functions.

Generating gated, pulse modulated signals requires the following external equipment.

Equipment Requirements

Gate Signal Source Must be capable of sourcing a TTL level

signal into a 50 load.

Caution

Connect

1.

The gate signal must never exceed the range of +5.5V to00.5V or damage to

the

equipmen

the

PULSE/TRIG, GATE IN

in

wn

sho

as

t

input can o ccur.

Figure

3-9

:

Figure 3-9. Gated Pulse Modulation Equipment Setup

2.

Set the desired carrier frequency.

For example, p erform the following procedure to set the carrier frequency to 6.67 GHz.

N

NN

N

a.

Select

the

N

Freq

N

NN

automatically select

to

order

in

u

men

N

the

N

CW

N

NN

N

FREQ

N

function.

b.

c.

3.

Set the con

4.

Set the desired RF output amplitude level.

4

Type

654.546547

5

on the signal generator n

Terminate the carrier frequency en

trols of the gate signal

source to generate the desired gate signal.

y selecting the

try b

umeric k

eypad.

NNNNNNNNNNN

GHz

softkey

.

For example, p erform the following procedure to set the output amplitude to045 dBm.

N

a.

b.

Select

yp

T

N

the

Amptd

4

e

4

0

5

on

5

4

5

men

the

in

u

signal

generator

umeric k

n

automatically

to

order

select

eypad.

N

the

N

AMPTD

Generating

function.

Signals

3-21

c.

Terminate the power level entry by selecting the

5.

Select

6.

If the RF output is currently turned o, select

NNNNNNNNNNNNNNNNNNNNNNN

ALC INT

to enable internal leveling.

NNNNNNNNNNN

GHz

softkey.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

to turn it on.

When the RF output is on,

7.

If necessary, turn o any mo dulation: FM or LOG AM by selecting the Modulation menu

RF ON

appears in the display.

and then pressing each function softkey so that O is underscored.

The display indicates which modulation types are on or o.

8.

Select

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

pulse modultn

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

gated pulse

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,and

GATED PULSE

in order to turn on

gated pulse mo dulation.

When gated pulse mo dulation is turned on, the text \

Pulse Gated

" appears in the

display.

9.

Set the desired pulse width.

For example, p erform the following procedure to set the pulse width to 100s.

N

PULSE

4

e

1540540

erminate

desired

the

example,

WIDTH

5

the

pulse

erform

p

on

pulse

the

rep

the

.

signal

width

etition

follo

generator

b

try

en

frequency

pro

wing

selecting

y

,

cedure

umeric

n

PRF.

to

the

set

eypad.

k

N

NN

MHz

the

N

softk

pulse

ey

rep

.

etition

frequency

10.

a.

b.

c.

Set

or

F

Select

Typ

T

NN

N

NN

N

kHz.

N

a.

Select

N

PRF

.

to

1

b.

yp

T

c.

erminate the

T

umeric

4

e

on

5

1

the

signal

pulse

generator

etition

rep

n

frequency

eypad.

k

try

en

selecting

y

b

the

N

KHz

NN

N

softkey

.

When the gate signal from the gate signal source is at a TTL high level, RF pulses will

appear at the signal generator

RF OUTPUT

connector for as long as the gate signal remains

high. If the gate signal switches to a TTL lowlevel during when a pulse is presentatthe

the

pulses

if

wn in

sho

will

pulse

last

the

een

,

set

to

100

and

s



OUTPUT

has b

Figure 3-10 will result in a v

complete

PRF

has

before

een set

b

alid gate signal.

the

to

pulse

1

kHz

train

(PRI

ceases.

to

set

1

or

F

ms),

example,

the

RF

width

3-22

Generating

Signals

Figure 3-10. Gated Pulse Mode Timing Example

Note

If the signal generator pulsed RF output is to be connected to average power

sensitive circuitry, refer to PWR LIM On O in the \Menus and Functions"

chapter of this manual.

Programming

the follo

In

frequency

width

T

equipmen

c

and

program

o

t

haracteristics,

OUTPUT

10

OUTPUT

20

OUTPUT

30

OUTPUT

40

OUTPUT 719;

50

OUTPUT

60

OUTPUT

70

80 OUTPUT

Example

wing example,

GHz

6.67

of

etition

rep

pulse

a

signal

the

in

wn

sho

as

and then

"*RST"

719;

"PULM:SOUR

719;

"TRIG:SOUR

719;

"TRIG:STOP:SOUR EXT"

719;

"PULM:STAT ON"

"POW:ALC:SOUR

719;

6.67GHZ"

"FREQ

719;

"POW:LEV

719;

a gated,

with

generator

Figure

run

INT"

EXT"

45DBM"

0

90 OUTPUT 719; "POW:PROT:STAT ON|OFF"

100 OUTPUT 719; "PULS:WIDT 100US"

110 OUTPUT 719; "PULS:FREQ 1KHZ"

120 OUTPUT 719; "OUTP:STAT ON"

130 END

pulse

er

w

o

p

a

frequency

to

,

3-9

follo

the

INT"

e

b

The

explained

source

generator.

internal.

to

mo

pulse

stop

on.

equency

will

de.

sour

to

pulses

the

for

e

c

6.67

45

0

mo

el

lev

of

generate

set the

wing

esets

Pr

Sets

Enables

Sets the

urns

T

Enables

Sets

dulated

45

0

of

kHz..

1

the

signal

gate

program.

signal

the

sour

pulse

trigger

pulse

mo

pulse

internal

arrier fr

the c

output

the

signal

dBm.

signal

e

c

d

e

trigger

dulation

leveling.

amplitude

Turns average power inhibit on or o.

Sets the pulse width to 100s.

Sets the pulse repetition frequency to 1 kHz.

Turns the RF output on.

generated

hav

will

e,

v

o

ab

desired

external.

to

GHz.

dBm.

at

ea

connect

gate

carrier

a

100

the

signal



pulse

s

asks

T

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNN

PWR LIM On Off

To Generate In

To Generate Externally T

ternal Pulse Mo dulation

riggered Pulse Mo dulation

To Generate External Pulse Mo dulation

To Generate a Doublet Pulse

To Generate Simultaneous Log AM and Pulse Mo dulation

Generating

Signals

3-23

To Generate Millimeter Signals

By using external equipment with the signal generator, you can generate millimeter wave

signals.

In order to generate millimeter-wave signals, the following external equipment is suggested.

Equipment Requirements

HP 8349B Microwave

Amplier

HP 8355X Millimeter

Source Module

Must be compatible with the Millimeter

Source Module used.

Must generate a signal at the desired

frequency.

In addition, you must supply any cables and adapters necessary to connect the equipment.

Equipment

e

av

Millimeter

Figure

Connect the

1.

Caution

2.

Enter the proper HP 8355X-series source module multiplier value into the signal

equipment

the

o

urn

T

millimeter

the

3-11.

sho

as

C

A

source mo

wn

p

the

in

to

er

w

o

dule in

W

Figure

the HP

terface cable.

:

3-11

8349B prior

Setup

connecting

to

or

generator.

Perform the following pro cedure to select and enter the prop er multiplier value.

N

NN

N

a.

Select

b.

Select

c. Press the n

multiplier v

N

the

Freq

N

NN

N

FREQ

umber k

N

men

N

NN

N

MULT

ey

u.

N

function.

on the displa

alue from the following table:

ynumeric k

eypad that corresp onds to the prop er

disconnecting

3-24

Generating

Signals

millimeter source module

Frequency Band Multiplier

Model Numb er

HP 83554A 26.5 - 40 GHz 2

HP 83555A 33 - 50 GHz 3

HP 83556A 40 - 60 GHz 3

HP 83557A 50 - 75 GHz 4

HP 83558A 75 - 110 GHz 6

Value

d. Terminate the multiplier value entry by selecting the

3.

Set the frequency of your desired output signal.

ENTER

softkey.

Notice that the signal generator frequency display shows the frequency and modulation

parameters at the output of the millimeter source module, not the signal generator RF

OUTPUT connector.

For example, if you want to generate a 30 GHz CW only signal, perform the following

steps:

N

NN

N

NNNNNNNNNNNNNNNNN

the

4

3540

the

output

N

On

RF

N

appro

using

N

5

NN

N

Off

N

ALC

ximate

FREQ

CW

the n

on

N

NN

softk

GHz

is

N

function.

output

N

INT

microw

the

function.

umeric

ey

turn

o,

is

NN

function

desired

terminate

to

it

the

on,

in

RF

e amplier

av

eypad.

k

b

on

displa

order

output

the

selecting

y

indicates

y

to

display

.

try

en

the

ate

activ

amplitude

.

N

Amptd

.

ON

RF

internal

the

at

N

NN

leveling.

output

men

then

and

u

the millimeter

of

the

4.

5.

6.

a.

Select

b.

Typ

c.

Select

the

If

N

AMPTD

When

Select

the

Set

dule

mo

e

RF

N

NN

N

the

source

These two steps are necessary in order to select the proper signal generator step attenuator

setting while in internal ALC mo de.

For example, to set the level to 0 dBm, rotate the signal generator displayKnob until \0

dBm" is shown on the microwave amplier's display.

7.

Select

Set

the

8.

displayed on the micro

The displa

millimeter source mo dule to within

the

microw

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ey

the

desired

ALC

DIODE

RF

softk

output

ave amplier.

w

amplitude

y on the HP 8349B microw

not

ave amplier,

the signal generator, when adjusting the RF

.

dule

at

the

output

of

ave amplier sho

6

2 dB. Remem

millimeter source

the

ws the po

wer lev

ber to look at the displa

mo

el at the output of

yonthe

output amplitude.

For example, to set the level to 0 dBm, select the AMPTD function and rotate the signal

generator displayKnobuntil \0 dBm" is shown on the microwave amplier's display.

Generating

Signals

as

3-25

Note

The Knob resolution can be changed using the Mo dify Step functions.

However, the multiplied signals frequency resolution is further limited

due to the FREQUENCY MULTIPLIER function. For instance, if the

FREQUENCY MULTIPLIER is set to 3, and the signal generator resolution is

1 kHz, the resulting resolution is 3 kHz.

Related Tasks

To Generate a CW Signal

3-26

Generating

Signals

To Use External Diode Detector Leveling

External dio de detector leveling is useful when you desire leveled RF output amplitude from

the signal generator at a point other than the RF OUTPUT connector.

External dio de detector leveling uses the following external equipment.

Equipment Requirements

Diode Detector Must be specied for use at the desired

signal generator output frequency and

must produce>1mV of ALC voltage for

the power levels present at the sampling

point.

Power Splitter

or

Must be specied for use at the desired

signal generator output frequency.

Directional Coupler

Power Meter

None.

(optional)

at

er

w

o

presen

eling

p

the

at

t

op.

lo

Sensor

er

w

Po

(optional)

capable

Must b

e

the frequency

sampling p

oint

of

and lev

the

in

measuring

el

lev

Note

In addition,

The

adjusting

sampling

ou

y

m

ust

w

o

p

supply

er

the

p

meter

oin

and

signal

t.

cables

the

Figure 3-12. External Diode Detector Lev

1.

Connect the equipmen

2.

Set the desired output signal using the

3.

T

urn

on

ternal lev

in

t as sho

eling

wn in Figure 3-12

selecting

y

b

er sensor

w

o

p

generator

and

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

NNNNNNNNNNNNNNNNN

Amptd

output

adapters

.

and

helpful

are

the

to

but

desired

connect

p

the

ow

are not

w

o

p

necessary

required,

for

er

eling Setup

function and any modulation.

NNNNNNNNNNNNNNNNNNNNNNN

then

ALC

INT

.

when

el

lev

er

equipmen

at

the

t.

Adjust

4.

sampling

the

signal

oin

p

tis

generator

attained.

RF

output

amplitude

so

that

the desired

Generating

the

at

er

w

o

p

Signals

3-27

For example, assume that you are using a power splitter and that you want05dBmat

the output of the splitter. In this case, you must set the power at the sampling (reference)

point(thepower splitter's other outputs) to05 dBm. Perform the following procedure to

set the power at the sampling (reference) pointto05 dBm.

a. Disconnect the diode detector from the p ower splitter and temporarily connect the

power meter and sensor to the sampling p oint.

b.

Select the

NNNNNNNNNNNNNNNNN

AMPTD

function.

c. Rotate the Knob on the MMS displayuntil the power meter displayreads05 dBm.

(Disregard the MMS display amplitude reading.)

Note that you can change the Knob resolution using the Mo dify Step functions.

d. Disconnect the power meter and sensor from the sampling p oint and reconnect the diode

detector to it.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

5.

Select the

ALC DIODE

softkey to enable external diode leveling.

When the ALC DIODE function is enabled, the signal generator enters the external diode

regardless

t,

oin

detector

gain

of

sampling

the

lev

hanges

c

eling

p

in

oin

mo

t.

the

de.

In

signal

this

path

mo

de,

b

et

w

er

w

o

p

een the

constan

held

is

signal generator

sampling

the

at

t

RF OUTPUT

p

connector and

select

ou

Notes

de

Dio

used to

is

detector

turn on

When

1.

p

sampled

External

2.

comp

en

eling

lev

diode

y

ma

er

w

o

ensation;

vironmen

requires

detector lev

y

p

dio

c

w

o

de

ts

hange.

er

OUTPUT 719; "POW:ALC:SOUR DIOD"

Related Tasks

CW Signal

Generate

o

T

Use

o

T

a

External

Meter

er

w

o

P

the

and

detector

us,

th

are

that

ual

man

eling

Leveling

DIODE

ALC

Therefore,

readjust

leveling

amplitude

temp

not

operation

HP-IB.

via

function,

recommended

is

it

necessary

if

it,

es

do

recalibration

erature

of the

the

.

vide

pro

not

ma

stabilized.

equipment.

signal

that

temp

e

b

y

The follo

generator

ou

y

erature

required

hec

c

in

wing

output

the

k

command

3-28

Generating

Signals

To Use External Power Meter Leveling

External p ower meter leveling is useful when you desire leveled RF output amplitude from the

signal generator at a point other than the RF OUTPUT connector.

External p ower meter leveling requires the following external equipment.

Equipment Requirements

Power Meter Must have a recorder output and range

hold capability.

Power Sensor Must be capable of measuring power at

the frequency and level presentatthe

sampling pointintheleveling lo op.

Power Splitter

or

Must be specied for use at the desired

signal generator output frequency.

Directional Coupler

addition,

In

supply

ust

m

ou

y

the

Figure 3-13. External Power Meter Leveling Setup

equipmen

Connect

1.

2.

Generate

3.

If the RF output is o, turn it on b

4.

Select the

the

NNNNNNNNNNNNNNNNNNN

ALC INT

desired

tas

output

NNNN

softkey to enable in

sho

cables

in

wn

signal

using

y selecting the

adapters

and

Figure

ternal lev

the

3-13

N

CW

necessary

.

N

NN

N

FREQ

NNNNNNNNNNNNNNNNN

eling.

N

NN

N

Amptd

connect

to

function

and

menu and then

equipmen

the

modulation.

y

an

NNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

t.

NNNNNNNNNNNNN

.

5.

Select the auto-range mode on the po

6.

Modify the signal generator output amplitude so that the p ower meter display indicates

wer meter.

the p ower desired at the sampling point.

coupling

a

has

F

of

or

22

example,

and

dB

assume

w

ou

y

an

that

+5

t

ou

y

dBm

are

using

at

directional

a

the output

of

the

coupler

coupler.

that

this

In

Generating

case,

ou

y

Signals

m

factor

ust

set

3-29

the p ower at the sampling p oint (the coupled output) to017 dBm. Perform the following

procedure to set the p ower at the sampling p ointto017 dBm.

a.

Select the

NNNNNNNNNNNNNNNNN

AMPTD

function.

b. Rotate the Knob on the signal generator until the p ower level displayed on the power

meter is017 dBm. (Disregard the power level shown on the signal generator display.)

Note that you can change the resolution of the Knob using the Modify Step functions.

7.

Select range hold (select range) mode on the power meter.

8.

Select the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PWR MTR READING

softkey on the signal generator.

The display data entry box indicates:

Power Meter Reading (Range-Hold)

XXXdBm

where XXX is the last \range-hold" power meter reading that was entered.

9.

Enter the power shown on the power meter displayinto the signal generator using the

umeric

n

eypad

k

and

N

dBm

N

softk

ey

.

F

en

a.

b.

10.

Select

The

ALC

When

meter

example,

or

ter

yp

T

erminate

T

displa

PWR

the

lev

17

0

4

e

0

the

indicates:

y

MTR

ALC

eling

if

dBm

4

5

1

N

ALC

PWR

de.

mo

5

the

N

the

in

4

7

NN

N

PWR

p

to

on

5

w

o

p

N

MTR

In

w

o

the

er

N

MTR

this

N

meter

er

signal

meter

N

softkey

function

de,

mo

curren

tly

generator:

generator

try

en

alue

v

the

on

selected,

is

is lev

wer

po

reads

umeric k

n

y

b

signal

eled at

17

0

selecting

generator.

signal

the

dBm,

eypad.

the

generator

sampling

erform

p

N

dBm

N

NN

softk

en

oin

p

the follo

ey

ters

t

wing steps

.

external

the

regardless

of

p

gain

changes in the signal path b etween the signal generator RF OUTPUT connector and the

sampling p oint.

Programming Example

signal

CW

a

el

lev

to

used

e

will b

eling

to

lev

signals

el

with

modulation

y

an

com

bination

the follo

In

(external

wing

o

p

er

w

example,

meter

leveling

external

can

meter

er

w

o

p

used

e

b

except pulse mo dulation; a CW signal is used here only as an example). The signal will ha

0

a frequency of 4.2 GHz with an initial

To program the signal

generator for external po

output amplitude of

shown in Figure 3-13 and then run the follo

wer meter lev

wing program.

23.3 dBm.

eling, connect the equipmen

tas

ow

ve

to

er

Notes

3-30

Generating

1. Since external power meter leveling is interactive initially, the program

prompts you to enter power level values until the desired power is attained

t.

oin

meter

er

w

o

output,

p

ving

ha

programmed

ho

meter

wer

o

p

y

an

with

done

e

b

can

eling

lev

dieren

since

er,

ev

w

t

meters

er

ow

p

are

at

External

2.

a

sampling

the

recorder

p

Signals

using dierent commands, the HP 437B power meter has been chosen for

this example.

10 PRINT "CHOOSE THE POWER LEVEL

DESIRED AT THE SAMPLING POINT

IN DBM (023.3 FOR EXAMPLE)"

20 ENTER KBD; Meter_power

30 OUTPUT 719; "*RST"

40 OUTPUT 719; "FREQ 4.2GHZ"

50 OUTPUT 719; "POW:LEV ";Meter_power

60 OUTPUT 713; "*RST"

70 OUTPUT 713; "LG"

80 OUTPUT 713; "FR 4.2 GZ"

90 OUTPUT 713; "RA"

100 WAIT 5

110 OUTPUT 713; "RH"

120 OUTPUT 713; "TR2"

130 WAIT 5

140 ENTER 713; Meter_reading

"POW:ALC:PMET ";Meter_reading

719;

OUTPUT

150

OUTPUT

160

OUTPUT

170

180 OUTPUT

PRINT

190

END

200

719;

713;

719;

"END

"POW:ALC:SOUR

"TR3"

"POW:LEV

PROGRAM"

OF

PMET"

";Meter_power

Enters the desiredpower level into variable \Me-

ter power."

Presets the signal generator.

Sets the output frequency to 4.2 GHz.

Sets the output amplitude .

Presets the power meter.

Changes power meter units from Watts to dBm.

Sets frequency at power meter to 4.2 GHz.

Selects Auto Range on the power meter.

Waits 5 seconds for the power meter to settle.

Selects Range Hold on the power meter.

Sets power meter to trigger with delay.

Waits 5 seconds for the power meter to settle.

Reads power from power meter into variable

ading."

ads the

gener

ower

p

the

e

initial p

ator.

external

meter

output

ower

p

ee

to fr

amplitude

meter

run

.

ading

e

r

leveling.

trigger.

into

the

\Meter r

Re

signal

Enables

Sets

o

T

Use

o

T

asks

T

External

CW Signal

Detector

de

Dio

Lev

eling

Generating

Signals

3-31

To Generate Simultaneous Log AM and Pulse Modulation

You can generate simultaneous logarithmic AM and pulse mo dulation by applying a voltage

waveform to the signal generator

EXT AM

connector while simultaneously applying external

(or, if your instrument has Option 1E2, internal or gated pulse) modulation. The resulting

signal at the signal generator

RF OUTPUT

connector is useful for antenna scan patterns in

radar receiver test applications.

The procedure that follo ws shows how to generate an antenna scan pattern.

Generating simultaneous log AM and pulse mo dulation requires the following external

equipment.

Equipment Requirements

Variable Voltage

Source or Arbitrary

Waveform Generator

Must be capable of producing the desired

antenna scan waveform with an

amplitude varying from a minimum of 0

volts to a maximum up to +6 volts,

depending on the amount of dynamic

range

required

in

scan

tenna

an

the

pattern.

Pulse

Generator

Must

signal

e

b

to

in

capable

50

a

sourcing

of

load.

aTTL

level

Caution

1.

15.5V

0

of

the

EXT

tenna

an

The

exceed

ccur.

o

can

our

y

If

2.

exceed

GATE

1.

Connect the equipmentasshown in Figure 3-14:

scan

damage

or

AM

range

the

instrumen

the range

input

IN

the

to

connector

+5.5V

of

Option

has

t

of +5.5V

ccur.

o

can

eform

v

a

w

m

EXT

is

to

ust

AM

5 k.

0.5V

0

1E2,

0.5V or

0

nev

The

the

er

input

damage

or

pulse mo

damage

exceed

can

pulse

range

the

The

ccur.

o

dulating

mo

EXT

the

to

dulating signal

PULSE/TRIG,

the

to

+15.5V

of

input imp

signal

m

PULSE

m

to

edance

ust

input

ust

nev

er

Set

2.

application.

3-32

pulse generator

the

Generating

Signals

Figure

3-14.

haracteristics

c

ttenna

A

Scan

(PRF

Equipment Setup

as

and

width

)

required

for

y

our

particular

3.

Set the signal generator carrier frequency for the pulsed RF using the

NNNNNNNNNNNNNNNNNNNNNNN

CW FREQ

4.

Set the power level required at the p eak of the main lob e of the scan using the

menu and

5.

Select the

6.

If the RF output is currently turned o, press the

7.

Choose external pulse mo dulation (or a type of internal pulse modulation if your

.

NNNNNNNNNNNNNNNNN

AMPTD

NNNNNNNNNNNNNNNNNNNNNNN

ALC INT

.

softkey to enable internal leveling.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

NNNNNNNNNNNNNN

Freq

softkey to turn it on.

instrument has Option 1E2), and set the pulse characteristics as required for your

particular application.

If your instrument does not have Option 1E2, select

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

and

PULSE Nml Inv

to choose b etween normal and inverted external pulse mo dulation.

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

and then

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PULSE On Off

menuand

NNNNNNNNNNNNNNNNN

Amptd

If your instrument has Option 1E2, you can use one of six pulse modulation mo des,

depending upon your application. You can access the six modes by selecting

then

and

erted,

v

in

8.

Select

When

9.

FM

If

When

the

Set

10.

amplitude

with

N

NN

pulse

gated,

N

Modultn

logarithmic

turned

is

frequency mo

arbitrary

NN

N

modultn

doublet,

NN

N

and

amplitude

on,

w

haracteristics

c

N

NN

and

then

select

dulation

eform

v

a

N

The

.

in

N

LOG

mo

N

the

is

generator

six

ternal

NN

N

On

AM

dulation

N

NN

N

On

FM

turned

that

pulse

triggered

N

NN

Off

N

Off

o,

or

hiev

ac

mo

N

is

N

softk

the

ariable

v

e

des

pulse

turn

to

turned

ey

displa

an

ternal, external

in

are

dulation.

mo

logarithmic

the

on,

turn

to

sho

y

oltage

v

tenna

scan

displa

o.

it

FM

ws:

source

with the

normal, external

amplitude

ws:

sho

y

.

OFF

duce

pro

to

desired dynamic

range.

olts.

oltage to

The

+1

v

an

olt

tenna

at

the

scan

EXT

w

v

a

AM

eform

should

connector,

v

the RF

output is

a

from

ary

the waveform shown in Figure 3-15 applied to the

positiv

ev

attenuated

EXT AM

connector causes the antenna

scan pattern shown in Figure 3-16 to appear at the signal generator

zero v

dB.

10

y

b

RF OUTPUT

connector (provided the output level has b een set to020 dBm).

NNNNNNNNNNNNNNNNNNNNNNN

Modultn

modulation

.

ON

AM

eform

v

wa

a

ev

or

F

example,

or

F

on.

ery

Figure 3-15. Example Antenna Scan Input

Generating

Signals

3-33

Figure 3-16. Example Modulated Antenna Scan Pattern

When the signal generator is used to generate antenna scan patterns, the pulsed signal does

not haveany duty cycle limitations.

Note

If the signal generator pulsed RF output is to be connected to average p ower

sensitive circuitry, refer to PWR LIM On/O in the \Menus and Functions"

chapter of this manual.

wing

AM

er

w

o

p

the

equipmen

wn in

sho

719;

Example

example,

external

and

of

el

lev

signal

generator

t

Figure

"*RST"

"PULM:SOUR

"PULM:EXT:POL

Programming

follo

the

In

logarithmic

e

lob

main

program

o

T

eform

v

10

20

30

the

OUTPUT

connect

a

w

40 OUTPUT 719; "PULM:STAT ON"

50 OUTPUT 719; "FREQ 2.3GHZ"

60 OUTPUT 719; "POW:LEV020DBM"

100 OUTPUT 719; "AM:STAT ON"

OUTPUT 719;

110

OUTPUT

120

END

130

"OUTP:STAT

"POW:ALC:SOUR

719;

as

an

0

sho

20

3-15

EXT"

ON"

tenna

an

pulse

dBm

to

in

wn

and

,

NORM|INV

INT"

generated

e

b

the

.

the

sour

TION

will

carrier

A

tenna

an

the scan

Set

wing

follo

to

external.

to

e

c

EITHER

TED EXTERNAL

INVER

frequency

pattern

scan

generator

program.

state.

eset

pr

NONINVER

TED

scan

dulation.

mo

e

b

will

generate

Figure

then

Sets

SELECTS

MAL)

MODULA

pattern

used.

3-14

run

the instrument

pulse

OR

Turns pulse modulation on.

Sets the carrier frequency to 2.3 GHz.

Sets the output amplitude to020 dBm (this is

the peak main lobepower level).

Turns logarithmic amplitude modulation on.

on.

output

RF

the

urns

T

Enables

internal

leveling.

using

2.3

of

explained

to

(NOR-

PULSE

ultaneous

sim

GHz

duce

pro

at

ab

a

o

the

eak

p

e,

v

scan

Related T

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNN

asks

NNNNNNNNNNNNNN

PWR LIM On Off

To Generate In

ternal Pulse Mo dulation

To Generate External Pulse Modulation

To Generate Gated Pulse Modulation

3-34

Generating

Signals

To Use the Flatness Correction Routine

When the FLATNESS CORRECTION routine is on, the signal generator performs a

calibration pro cess that corrects for external losses or p ower variations in an external signal

path. In order to use FLATNESS CORRECTION, the signal generator must rst run the

CALIBRATE FLATNESS CORRECTION routine. During the CALIBRATE FLATNESS

CORRECTION routine, an HP 437B, HP 438A, HP 70100A, or a SCPI compatible p ower

meter, that is under control of the signal generator, measures power variations at the output

of the external signal path over a user-dened frequency range. The signal generator then

reads back the power level data from the power meter and creates a table of correction

values for each frequency point (the atness correction table). The atness correction table

is automatically stored in one of four non-volatile memory registers. Up to four atness

correction tables can be stored for later use.

When FLATNESS CORRECTION is on, the atness correction table adjusts the signal

generator output power (to comp ensate for losses or gains) to provide constantleveled p ower

at the external port.

Note

Using

the CALIBRA

equipmen

linear

external

is

(m

ust

If

lev

ha

ou

y

eled in

ea

v

TE

the

use

ternally,

1dB

FLA

TNESS

FLA

devices external

dB transfer

to 1

TNESS

CORRECTION

to the

function).

CORRECTION

signal

routine

generator

requires

when

the

m

follo

ust

RF

wing

output

e

b

t:

Equipment Requirements

er

w

o

P

437B

HP

or

Meter

er

w

or

o

er

w

o

P

438A P

HP

Meter

70100A

HP

Meter

SCPI compatible

power meter

Power Sensor Must be compatible with the chosen

power meter. Must be capable of

measuring power at the frequencies and

signal

the

levels

path

presen

eing

b

t

lev

at

eled.

the

output

of

In addition, y

ust supply the cables and adapters necessary to connect the equipmen

ou m

Generating

Signals

t.

3-35

Figure 3-17. Flatness Correction Equipment Setup

1.

Connect the equipmentasshown in Figure 3-17:

the

N

FLATCOR

N

FLATNES

NNNNNNNNNNNNNNNNN

Amptd

register

N

NN

N

menu so that the

where

data

store

to

N

NN

N

flatnes corrctn

N

NN

N

On

N

DATA

N

NN

N

Off

N

the

N

2

in

N

NN

N

so

N

so

2.

Select the

3.

Adjust the signal generator AMPLITUDE to a level near the center of your power sensor

range.

4.

If the RF output is currently turned o, press the

Select

5.

example,

or

F

a.

Select the

b.

Select

c.

Select

atness

TNESS

FLA

N

men

that

NNNNNNNNNNNNNNNNN

AMPTD

correction

u.

underscored.

is

O

underscored.

is

it

function is selected.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

AMPTD On Off

b

to

is

data

register,

2

A

T

A

D

stored.

e

erform

p

softkey to turn it on.

steps:

wing

follo

the

o

w

er

routine.

Meter.

atness

external

Select

6.

For

a.

b.

c.

7.

Enter the power meter address into the signal generator so that the instrument can

address the p ower meter during the atness correction routine.

For example use the following steps to set the address to 23.

a.

b.

c.

8.

Select the start frequency for data collection b

NNNNNNNN

START FREQ

When the START FREQ function is selected, the display data entry box indicates:

the

example,

N

Select

T

Select the

NNNNNNNNNNNNNNNNNNNNNNNN

N

MORE 1

the

NN

N

HP70100

the

4

e

yp

Cor

X.XXXXXXXXXGHz

wher

4

5

2

3

Start

X.XXXXXXXXX

e

p

wing

follo

the

use

N

NN

N

NN

power

N

NN

N

PWR

on

5

NNNNNNNNNNNNNNNNN

ENTER

softkey.

Frequency

.

of 2

N

function so that it is underscored.

NN

N

MTR

the

N

NN

N

meter

N

NN

N

ADDRESS

signal

softkey in order to terminate the en

meter

er

w

o

to

pro

N

u.

men

N

NN

N

generator

the

is

cedure

function.

umeric

n

ent

curr

select

to

start fr

during

used

e

b

the

HP

the

eypad.

k

try.

y pressing the

quency.

e

correction

70100A

4

(

P

5

key and then the

9.

3-36

the

ter

En

Generating

desired

Signals

start

frequency

.

For example, use the following pro cedure to set the atness correction start frequency to

3.5 GHz.

a. Type

b.

10.

Select the

The displaydata entry box indicates:

11.

Enter the desired stop frequency.

For example, use the following pro cedure to set the atness correction stop frequency to

9.75 GHz.

a. Type

b.

12.

Select

The

4354.5455

Terminate the atness correction start frequency by selecting the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

STOP FREQ

Cor Stop Frequency

X.XXXXXXXXXGHz

where X.XXXXXXXXX is the current stop frequency.

4954.5475455

Terminate the stop frequency by selecting the

N

the

POINTS

y

displa

number

Set

XX

e

wher

on the signal generator numeric keypad.

softkey in order to enter the atness correction stop frequency.

on the signal generator numeric keypad.

NN

N

indicates:

of

the

is

function in

points

numb

ent

curr

order to

er

of

enter

oints.

p

the n

NNNNNNNNNNN

GHz

um

softkey.

of

er

b

p

oin

ts

NNNNNNNNNNN

GHz

to

b

softkey.

calibrated.

e

ts.

oin

p

of

er

b

um

start

use the

5

the

N

NN

displa

TNESS

N

and

n

stop

and

following

signal

the

on

er of

b

um

n

softkey.

u

men

N

NN

N

FLATCOR

wer meter.

returns

y

CORRECTION

then

softk

to

N

FLATCOR

n

the

run

to

ys eac

routine

On

in

er

b

um

n

eypad.

k

to

wer meter

N

NN

the

ENTER

routine.

the

run

h frequency and po

u.

men

nished

is

underscored.

is

include

try b

decide

atness

after the

NN

N

Off

are

set

to

umeric

n

selecting

y

not

order

in

correction

N

that

so

frequencies

cedure

pro

generator

ts en

poin

ou

y

if

ey (again)

, the correct calibration factors for y

the

N

NN

N

On

ts.

oin

p

of

er

b

um

100.

to

ts

oin

p

of

N

softk

calibration

each frequency poin

.

ey

routine.

wer meter

our sensor should be

running

b

selecting

y

desired

the

ter

En

13.

the

that

Note

example,

or

F

4

e

yp

a. T

b.

T

14.

Select the

At this point, the display returns the CALIB FLATCOR function and the previous menu

function so that you have the opportunity to abort the atness correction routine and

return

15.

Select

As

reading. Note that the signal generator sends the po

that

level. Th

tered into the po

en

When the signal generator completes the CALIBRATE FLATNESS CORRECTION

routine,

urn

T

16.

N

MORE

1540540

erminate

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

CALIB FLATCOR

the

to

N

the

CALIB

the signal generator runs the routine, it displa

the po

N

wer meter can use the correct sensor calibration factor to determine po

us, for highest accuracy

the

FLA

on

N

NN

N

of 2

2

tso

wer

Generating

Signals

3-37

The signal generator now uses the atness correction data to adjust the RF output

amplitude so that the

RF Output connector

displayed power level is the level at the external port, not at the

. The correction is active

for anypower level

and any frequency

within the calibrated frequency range.

17.

Disconnect the power meter and power sensor from the external signal path.

Notes

1. The data stored in non-volatile memory is only be valid for the current

external signal path. If the external signal path is changed, the

CALIBRATE FLATNESS CORRECTION routine must be run again.

2. You can abort the CALIBRATE FLATNESS CORRECTION while it is

running by selecting the

NNNNNNNNNNNNNNNNN

ABORT

softkey.

Programming Example

During the atness correction routine, the signal generator must act as a controller.

Therefore, it is not possible for another system controller to initiate a atness correction

externally

quency

e

orr

quency

e

fr

ction

e

ator

addr

data

tables.

ay.

arr

factor

ess

addr

variable

ess

into

ay.

arr

variable

to

719.

Start

routine.

the

load

DIM

10

DIM

20

signal

30

Power_meter=713

40

PRINT

50

wing

follo

The

collected

data

Frequencies(1:401)

Losses(1:401)

generator=719

START

"CHOOSE

THE

program

to one

in

FREQUENCY

can

of the

IN

gather

to

used

e

b

signal generator

(1.654321

GHZ

atness

atness correction

Dimensions

Sets

FOR

Enters

correction

fr

c

signal gener

meter

ower

p

start

EXAMPLE)"

KBD;Start_freq

ENTER

60

70

PRINT

"CHOOSE

THE

STOP

FREQUENCY

IN

(15.123456

GHZ

FOR

Enters

stop

quency

e

fr

into

variable

Stop

EXAMPLE)"

KBD;Stop_freq

ENTER

80

401)"

(2 TO

POINTS

90

100

110

PRINT

ENTER

PRINT

INTO

"CHOOSE

KBD;Points

"CHOOSE

4)"

TO

(1

THE

NUMBER

LEVEL

OF

CORRECTION

TABLE

TO

STORE

DATA

Enters

ble num.

numb

orr

c

er

ction

e

oints

p

of

table

variable Points.

into

er

numb

into

variable

120 ENTER KBD;Table_num

130 PRINT "CHOOSE THE SIGNAL GENERATOR POWER LEVEL TO USE

Enters power level into variable Power lev.

DURING ";

140 PRINT "THE LEVEL CORRECTION"

150 PRINT "(03.32 FOR EXAMPLE)"

160 ENTER KBD;Power_level

ator.

gener

ator p

ower

level

the

to

170

180

OUTPUT

signal

generator;

"*RST"

";Power_level

"POW

Pr

Sets

esets

the signal

signal

value.

190 OUTPUT Power_meter; "*RST"

200 OUTPUT Power_meter; "FM 32 EN"

210 OUTPUT Power_meter; "TR0"

220 Step_freq=(Stop_freq-Start_freq)/(Points-1)

230 Current_freq=Start_freq

240 FOR I=1 TO Points

Presets the p

Sets numb

Sets

Calculates the fr

Sets rst fr

Stores curr

ower meter.

er of aver

ages.

power meter to trigger hold mo

equency step.

equency in arr

ent fr

ay to start fr

ay.

de.

250 Frequencies(I)=Current_freq

260 OUTPUT signal generator; "FREQ ";Current_freq;" GHZ"

270

280

290

OUTPUT

WAIT

Power_meter;

5

";Current_freq;"

"FR

"TR2"

GZ"

Sets signal generator frequency to the current

ay.

arr

in

quency

e

fr

curr

the

to

quency

e

fr

meter

ower

p

Sets

ay.

arr

in

quency

delay.

with

trigger

to

meter

ower

p

Sets

to

meter

ower

p

for

onds

c

se

ve

Waits

then

,

719.

to

e

fr

q.

e

fr

enter

equency.

ent

settle.

q.

a-

T

d

e

e-

fr

3-38

Generating

Signals

300 ENTER Power_meter;Meter_reading

310 Losses(I)=Power_level-Meter_reading

320 Current_freq=Current_freq+Step_freq

330 NEXT I

340 OUTPUT signal generator; "MEM:TABL:SEL

FDAT";TRIM$(VAL$(Table_num))

350 !

360 ! Store frequencies

370 !

380 OUTPUT signal generator; "MEM:TABL:FREQ ";

390 FOR I=1 TO Points

400 OUTPUT signal generator;Frequencies(I);"GHZ";

410 IF I<Points THEN OUTPUT signal generator;,"";

420 NEXT I

430 OUTPUT signal generator USING "/"

440 !

450 ! Store losses

460 !

470 OUTPUT signal generator; "MEM:TABL:LOSS ";

480 FOR I=1 TO Points

490

500

OUTPUT

520

530 PRINT

END

540

signal

OUTPUT

IF I<Points

I

signal

"END OF

generator;Losses(I);

OUTPUT

THEN

generator

USING

PROGRAM"

signal

"/"

generator;,"";

Enters current power meter reading into variable

Meter reading.

Stores the correction factor in array.

Increments current frequency to the next fre-

quency in the table.

Selects a table to store data to.

Commands signal generator to load following

frequency points into table.

Adds a frequency point into the table.

Adds a data separator (comma).

Adds a line feed.

Commands signal generator to load following

correction factors into table.

Adds a correction factor into the table.

omma).

(c

ator

ar

sep

data

a

dds

A

d.

e

fe

line

a

dds

A

o

T

asks

T

Previously

Stored

Flatness

Correction

Data

Generating

Signals

3-39

To Use Previously Stored Flatness Correction Data

When the CALIBRATE FLATNESS CORRECTION routine is run, the signal generator

creates a table of correction values for each frequency point in the table. Up to four atness

correction tables can be stored in the signal generator memory. If the current signal path at

the signal generator output (the external signal path) is identical to the external signal path

for which a CALIBRATE FLATNESS CORRECTION routine has b een run, the atness

correction table can b e recalled from memory and be used at a later time.

1.

Verify that the current external signal path is correct for the atness correction table that

you want to recall from memory and use.

The current external signal path must be identical to the external signal path that was

calibrated and stored in the atness correction table that you wish to recall. If the current

signal path is dierent, the data can cause inaccurate output amplitude s at the external

port.

2.

Select the

3.

Select

recall

Select

4.

to

NNNNNNNNNNNNNNNNN

Amptd

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FLATNES DATA x

data.

N

NN

N

FLATCOR

atness

the

use

menu and then the

where x is the register (1 through 4) from whichyou wish to

N

Off

On

so

that

N

NN

N

correction

data

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

flatnes corrctn

underscored

is

On

determining

when

in

order

the

menu.

to

output

enable

the

amplitude.

signal

generator

wing

and

the

Example

example,

to

used

um

generator

er four,

b

signal

n

correction

Programming

follo

the

In

four

er

b

um

n

program

o

T

register

in

data

the atness

for

program.

"CORR:CSET

10

OUTPUT

719;

20 OUTPUT 719; "CORR:STAT ON"

30 OUTPUT 719; "CORR:CSET:STAT ON"

40 END

asks

T

the

Flatness

Correction

atness

the

el

lev

rst, ensure

data

FDAT4"

correction

data

signal generator

output

the

el

lev

to

the

that

register

Sele

in

cts

the

atness

stored

number four.

Enables al l corrections

Turns atness correction on.

Routine

recalled

is

output

amplitude

curren

b

um

n

orr

c

amplitude

external

t

four,

er

ction

e

from

using

and,

table in

atness

.

the atness

signal

then,

gister

re

correction

is

path

the

run

register

correct

wing

follo

3-40

Generating

Signals

If You Encounter a Problem

If you have a problem generating signals with the signal generator, check the following list

of commonly encountered problems and troublesho oting procedures. If the problem involves

data entry or the display,check the Chapter 2 section entitled \If You Encounter a Problem."

If the problem that you encounter is not in the following list or in Chapter 2, refer to the

Troubleshooting section of the

Instal lation and Verication Manual

for your particular MMS

display module, or contact the nearest Hewlett-Packard oce for service.

If the UNLEVELED LED is on:

Check the leveled power specication to make sure that you have not exceeded the

specication.

Check that the ALC DIODE or ALC POWER METER functions are not inadvertently on.

If the ERR LED is on:

Refer to the procedure, \To Check the Error Queue", in Chapter 2, \Performing Fundamental

Operations."

Output connector:

RF

the

there

If

Chec

The

whether

signal

no

is

that the

k

AMPTD

the

at

N

AMPTD

On/O

function

NN

N

function

is

NN

On

on

NN

Off

function

under

is

through

o

or

is On.

Amplitude

the

message

men

RF

ON

u.

indicates

also

y

displa

The

.

OFF

RF

or

.

N

problems.

Chec

Note

input

the signal

If

Chec

ecications.

sp

the RF

If

the

k

if

that

signal

generator mo

that the

k

Output

external

pulse

the

at

external mo

connector

modulation

dulation

mo

PULSE

EXT

dulation

signal

is on

dulating

for

standard

in

connector,

and

on

is

signal

not

es

do

the

source

ear

app

non-in

RF

signal

is

to

erted

v

output

distorted:

is

within

phase

e

b

op

signal

the

lo

eration,

will

signal

ed

k

c

but,

o.

turn

generator

the external

to

reference:

Check that the external reference is within signal generator specications. Refer to

\Specications and Options", Chapter 4.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

C.

A

to

is set

is

AC

found

DC

under

Miscellaneous

the

men

u.

\A

underscored when

is

C"

Chec

FM

that

k

TYPE

on.

is

FM

AC

TYPE

DC

there

no

is

C

A

Generating

Signals

3-41

4

Specifications and Options

This section contains the sp ecications, supplemental characteristics, and warranty, electrical,

and do cumentation options for both the HP 70340A and the HP 70341A .

Refer to the entry \Accessories (included)" in the \Front and Rear Panel" chapter for the

accessories and do cumentation which are included with the HP 70340A shipment. Refer to

the entry \Accessories (not included)" for accessories such as cables whichmay be required

for certain signal generator and frequency extension mo dule applications. Similarily,the

\Reference" chapter of the

documentation which are included with the frequency extension module.

HP 70341A Instal lation Guide

contains the accessories and

Specifications

and

Options

4-1

HP 70340A and HP 70341A Specifications

Specications describe the instruments warranted p erformance over the 0to 55temperature

range unless otherwise noted. Supplemental characteristics,

indicated by italics,

are intended

to provide information useful in estimating instrument capabilityinyour application by

describing typical, but not warranted, p erformance.

Frequency

Range:

HP 70340A Mo dular Signal Generator, 1.0 to 20.0 GHz

HP 70341A Frequency Extension Module, 10 MHz to 1 GHz

HP 70341A can only be used in combination with the HP 70340A.

Resolution:

1 kHz (1 Hz with Option 1E8)

Stability (with external high stability timebase):

Aging Rate:

same as external reference.

Temperature Eects: same as external reference.

Stability (without external high stability timebase):

ging

A

Temp

quency

e

r

F

100

<

ate:

R

eratur

to

ms

2

1.0

<

cts:

e Ee

Switching

within

10

<

Time:

kHz,

1

-8

/day

5

2

10

after

-6

<

MHz

over 0

ms

50

72-hours

to 55

within

to

GHz.

1

-

at



C, r



25

C

eferenc

kHz,

1

6

10

1

ed



-

C

to 25

20

GHz.



C

Specifications

4-2

and

Options

RF Output

Maximum Leveled Output Power:

Frequency Standard with Option

1E1

0.0101

+13 dBm +13 dBm

GHz

1018 GHz +11 dBm +10 dBm

18020 GHz +10 dBm +8 dBm

Typical

maximum

Typical maximum a

Display Resolution:

ailable

v

a

0.01 dB

output

po

(Option

1E1)

vailable output po

installed.

wer from 0.01 to 1 GHz at 25

25

at

GHz,

20

to

1

from

er

w

Minimum Leveled Output Power (without Option 1E1):04 dBm

Minimum Leveled Output Power (with Option 1E1):090 dBm



C

with

output

step



C.

attenuator

Accuracy:

MHz

10

MHz

50

(

to

0

4

50

20

dBm

MHz:

GHz

to

6

ecied

sp

1.3 dB

6

1.0

dB

maxim

um

lev

eled

output p

er)

w

o

Specifications

and

Options

4-3

Accuracy:

(over all sp ecied temperatures and power levels)

10 MHz to 50 MHz:62.3 dB

50 MHz to 20 GHz:62.0 dB

The use of Type-N RF connectors above 18.0 GHz degrades sp ecication typically by0.2dB.

Flatness:60.5 dB. The use of Type-N RF connectors above 18.0 GHz degrades sp ecication

typically by 0.2 dB.

Level Switching Time:<15 ms (without step attenuator range change. Attenuator range

changes occur at04 dBm,014 dBm,024 dBm, etc.)

Output SWR:<2.0 : 1 nominal

lev

Spectral

Phase

SSB

Purity

Noise

Typical

(dBc/Hz):

output

Offsets

Carrier

Freq.

500 MHz

2 GHz

GHz

10

18 GHz

100Hz1kHz 10

kHz

0

86

0

70

0

74

0

66

0

75

0

69

0

63

0

70

0

103

91

79

73

Phase noise decreases 6 dB/octa

accuracy

el

100

kHz

0

ve belo

flatness

and

119

107

101

99

w 500 MHz and reac

+10 and

at

hes a oor

0

85

of<0

dBm

140 dBc/Hz.

Specifications

4-4

and

Options

Typical single-sideband phase noise at 50 MHz, 1 GHz and 20 GHz, 25C, CW mode. Offsets

less than 100 Hz require use of external high stability timebase.

Harmonics:<0

55 dBc at output levels<+6 dBm, 0.01 to 20 GHz

Typical

Non-Harmonic

Spurious

spurious).

Non-Harmonic

Spurious

Sub-Harmonics: None

2nd

(

harmonic

kHz):

3



kHz):

3

<

lev

<

0

els

60 dBc

50

0

measured

(includes

dBc

at

output

w

o

p

po

er

wer

supply

of

and

dBm

+6

frequency

syn

thesis

Specifications

and

Options

4-5

Residual FM:

<

GHz,

1

t

A

Noise

GHz.

140

FM

Flo

dBm/Hz,

esidual

R

AM

20

0

<

Typical residual FM measured in 50 Hz - 15 kHz bandwidth, CW mode.

andwidth.

b

kHz

15

-

Hz

50

in

Hz

15

GHz.

1

osets

below

e

gr

ater than

5MHz

150

0

arrier)

c

om

fr

<

de

or:

cr

ases

e

(at

0.01

6dB

dBm

0

-

1

per

and

GHz.

octave

dBm/Hz,

-

1

Specifications

4-6

and

Options

Modulation

CARRIER

FREQUENCY

Minimum Pulse

Width

Rise/Fall Time

Video

Feedthrough

Pulse Width

Compression

Pulse Delay

(Video out to RF

out)

Modulation

Pulse

On/O

Ratio:

<

25

MHz

<

500

ns

>

6

80

25 -<64

<1

<

150 ns

<1

dB

64 -<128

MHz

s

350 ns

<

2mVpeak-to-peak at 0 dBm

s

MHz

<

50 ns

<

100 ns

6

15 ns

200 ns

128 -<500

MHz

<

35 ns

500 -<1000

MHz

<

Typically<10 ns

<

20 ns

<

125 ns

25 ns

peak-to- peak

6

5ns

1 - 20 GHz

<

10 ns

<

20 mV

at 0 dBm

<

100 ns

evel A

L

Pulse

Maximum

Minimum

Pulse

Pulse Oversho

Input Imp

Maximum L

0

0.5 dB

edance: 50 nominal; TTL drive levels

eveled Output Power in Pulse Mo

Typical pulse modulation on/off ratio at +8 dBm

epetition

R

Duty

(r

acy

cur

c

ot:<10%

Cycle:

elative

e

r

F

No

to

quency:

estrictions

r

CW):

>

6

3

1.0

MHz

duty cycle.

on

dB

de (r

elative

to CW):

Specifications

and

Options

4-7

Typical pulse modulation envelope illustrates the fast rise and fall times, excellent flatness and

pulse fidelity of the HP 70340A

Internal Pulse Source (Option 1E2)

Pulse

dela

Pulse Rep

Pulse

ariable

V

ariable

V

225

Pulse

pulse

All

internal

Source

doublet

,

y

etition F

etition

Rep

Width

Pulse

419

to

ns

Width/Dela

Delay

dulation

mo

source.

pulse

Mo

and

(T

w

Dela

ms

(Vide

ree-run,

F

des:

gated require

requency:

(PRI):

al

terv

In

to

ns

25

):

(free-run

y

(triggered

y

ns

25

6

with

y/PRI

oto

sp

Resolution:

T

RF,

ecications and

triggered

external trigger

>

to

Hz

3

ns

300

ms

419

mode,

dela

with

jitter

25

Nominally

):

m

supplemental

with

dela

doublet

,

y

and

gated.

riggered

T

with

source.

MHz

3

ms

419

to

T

419

6

):

d

doublet

&

y

ms

from

mo

des,

sync

pulse to

T

):

d

video

dulation

mo

ns

GHz

20

to

1

ns,

<

20

,

of

haracteristics

c

apply

during

use

Specifications

4-8

and

Options

Agilent 70340A User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

In This Book

Contents

Performing Fundamental Operations

Generating Signals

Specifications and Options