Agilent 71910A User's Guide

User's Guide

HP 71910A Wide-Bandwidth

Surveillance Receiver

ABCDE

71910-90002

No.

art

P

HP

Printed

USA

in

Edition

December

1996

A.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.

This instrument has been designed and tested in accordance with IEC Publication 348,

Requirements for Electronic Measuring Apparatus

, and has b een supplied in a safe condition.

Safety

The instruction do cumentation contains information and warnings whichmust be followed by

condition.

safe

a

in

the user

to ensure

safe op

eration

and

to

main

tain

instrumen

the

t

c



Copyright Hewlett-Packard Company 1994{1996

All Righ

ermission

p

oun

F

1400

Reserv

ts

is

taingro

Repro

ed.

prohibited,

arkw

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e

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duction,

except

Santa

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a

adaptation,

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ed

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CA

translation

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cop

the

95403-1799,

yrigh

USA

without

ws.

la

t

prior

written

Safety

WARNING

CAUTION

WARNING

UTION

CA

No operator serviceable parts inside. Refer servicing to qualified personnel. To

prevent electrical shock, do not removecovers.

For continued protection against fire hazard, replace line fuse only with same

type and ratings (type 6.3A/250V). The use of other fuses or materials is

prohibited.

Always use the three-prong ac power cord supplied with this instrument.

Failure to ensure adequate earth grounding by not using this cord maycause

instrument damage.

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

the

make

ely to

protectiv

instrument

instrumen

This

Degree

2

conductor

e

dangerous.

t

IEC

per

outside

inside

or

Intentional interruption

and

for

664

designed

is

1010

of

in Installation

use

ectiv

resp

instrument

the

is prohibited.

.

ely

is lik

Category I

I

and

ollution

P

UTION

CA

WARNING

cabinet,

a

in

restricted.

e

b

maxim

the

atts

w

greater

is

t

um

dissipated

than

The

op

800

erating

tilation

en

V

ection

v

con

erature

temp

erature

temp

cabinet.

forced

then

Requiremen

and

to

in

(outside

the

of

total p

If the

ection

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ts:

When

the

of

out

cabinet)

the

instrumen

dissipated

er

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ust

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installing

instrumen

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ery

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cabinet

instrumen

not

than

100

If this instrument is not used as specified, the protection provided by the

equipment could be impaired. This instrument must be used in a normal

condition (in which all means for protection are intact) only.

the

bien

am

in the

atts,

w

t

iii

Surveillance with the HP 71910A

The HP 71910A Wide-Bandwidth Surveillance Receiver provides b oth signal search and signal

collection capabilit y from 100 Hz to 26.5 GHz. It is optimized for surveillance and signal

monitoring applications. The HP 71910A can be op erated in either of the following two

instrument mo des:

Spectrum analyzer op eration for signal searches

Maximum resolution BW

::::::::::::: ::::::::::::::: ::::::::::::::: ::::::

Wide-bandwidth receiver operation for signal collection

IF BW

Note

receiv

The

digitizers,

:::::::::::::: ::::::::::::::: ::::::::::::::: :::::::::::::::

surv

ectrum

instruments.

er's

FFT

When y

sp

not

IF

ou use

ectrum analyzer

100

a

video

and

baseband

the

bandwidth

MHz

outputs

analyzers,

wide-bandwidth

maxim

the

mode

sp

examined

e

b

can

other

and

eillance

resolution

um

analyzer.

oscilloscopes,

y

b

er,

receiv

bandwidth

3 MHz

10 to 100 MHz

er

remem

demo

b

MHz;

3

is

dulators,

that

in

is

it

HP

71910A

Wide-Bandwidth

eillance Receiv

Surv

er

iv

HP 71910A Option 011

When rst turned on, the wide-bandwidth surveillance receiver op erates as a spectrum

analyzer. This allows you to view signals across a large frequency range. Once you'velocated

a signal, switch to the xed-tuned receiver mo de to downconvert the signal.

The downconverted signal is available at the rear panel for pro cessing and analyzing by

external devices. The Option 011 version of the instrument is primarily used as a collection

MHz

3

vide

and

a

more

it

er;

receiv

maxim

um

complete sp

outputs

IF

limited

ery

v

has

eak detection

p

ectrum analyzer.)

are

ailable

v

a

at

ectrum

sp

analyzer

bandwidth. (Option

panel

rear

the

capabilit

013 adds

due

y

an HP

linear

to

70902A

detection

pro

to

receiv

In

standard

additional

cessing

pro

de,

mo

er

rear-panel

MHz

70

these

do

the

output

and

signals.

wncon

is

140

v

cen

MHz

erted

tered

IF

signal

at 321.4

signals

a

is

resp

vailable

MHz.

ely

ectiv

the

at

Option

Refer

.

instrumen

and

001

Chapter

to

t's

002

panel.

rear

instrumen

examples

for

3

ts

The

pro

vide

of

v

Demodulated outputs are available at the front panel

The front-panel

VIDEO

connector provides AM and pulse demodulation. Option 004 provides

additional I/Q outputs and Option 005 provides an additional FM output. Refer to Chapter 3

for examples of processing these signals.

a

vide

pro

de),

mo

XY

in

h

v

ery

e

8PSK,

as

oset

dicult.

this

16

frequency

in

spinning

QAM,

But,

ecause

b

mo

and

et

b

emen

v

w

64

een

QAM.

the

of

can

t

the

e

b

instrumen

enien

v

er and

004

ypical

t

metho

t

receiv

the

Option

con

With

receiv

wide-bandwidth

p

the

to

ed

w

slo

d

signal.

surv

t

oin

ts

iden

of

ers,

eillance

where

(together

tifying

constellations

the

mak

This

receiv

almost

is

it

with

dulation

mo

format

es

er's

external

an

\spin"

iden

frequency

Hz

1

stopped.

oscilloscop

formats

due to

tication

suc

the

tuning,

256 QAM Constellation Display

ed on Oscilloscope

vi

Switch between operating mode with the press of a button

NNNNNNNNNNNNNNNNNNNNNNN

Press

4

5

Press

USER

4

MENU

and then

5

for use as a spectrum analyzer.

RX_MODE

for use as a wide-bandwidth surveillance receiver.

This is the default state when the instrument is rst turned on.

Press

4

DISPLAY

5

to access functions for controlling the display.

You will seldom need to use this key.For information on functions accessed with this key,

refer to the

Press

4

INSTR

HP 70004A DISPLAYOperating Manual

5

to switchbetween multiple instrument windows.

.

Multiple instrument windows must rst be congured as shown in Chapter 3.

vii

Changing measurement parameters is easy

Use the front-panel knob, step keys, or numeric keypad to enter new measurements settings.

For example, press the

the setting, pressing the

4

CENTER

4

HOLD

5

key to change the displayed center frequency. After changing

5

key disables the keypad, knob, and step keys until another

function is selected.

Use the

45

(backspace) key to speed your navigation through softkey menus. When pressed,

the previous softkey menu is displayed. Also, use this key to backspace over numbers entered

using the data-entry keypad.

Conventions

The following key conventions are used in this guide:

4

Front-panel key

NNNNNNNNNNNNNNNNNNNNNNN

Softkey

5

Text shown like this represents a key physically located on the receiver.

Text shown like this represents a softkey. (The softkeys are located next to

the softkey labels, and the softkey lab els are the annotation on the rightor

left side of the spectrum analyzer display.)

Screen Text

Text

prin

ted

in

this

indicates

eface

yp

t

text

instrumen

the

on

ed

y

displa

t's

screen.

viii

Instrument Markings

L

The instruction documentation symbol. The product is marked with this symbol when

it is necessary for the user to refer to the instructions in the do cumentation.

\CE" The CE mark is a registered trademark of the European Community. (If accompanied

byayear, it is when the design was proven.)

\ISM1-A" This is a symbol of an Industrial Scientic and Medical Group 1 Class A product.

\CSA" The CSA mark is a registered trademark of the Canadian Standards Asso ciation.

CAUTION

Caution

denotes a hazard. It calls attention to a pro cedure that, if not

correctly performed or adhered to, could result in damage to or destruction of

the instrument. Do not pro ceed beyond a

caution

note until the indicated

conditions are fully understoo d and met.

WARNING

Warning

correctly

not

understood

denotes a hazard. It calls attention to a procedure which, if not

loss

or

injury

in

result

note

could

until

the

indicated

conditions

performed or

proceed

bey

and

ond

met.

adhered to,

warning

a

of

life.

are

Do

fully

ix

Assistance

Product maintenance agreements and other customer assistance agreements are available for

Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard Sales

and Service Oce.

Regulatory Information

Regulatory information is lo cated in Chapter 5, \Specications and Characteristics."

Certification

Hewlett-Packard Company certies that this product met its published sp eci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.

x

Warranty

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

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

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

be defective.

For warranty service or repair, this product must b e returned to a service facility designated

by Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and

Hewlett-Packard shall pay shipping charges to return the product to Buyer. However, Buyer

shall pay all shipping charges, duties, and taxes for pro ducts returned to Hewlett-Packard

from another country.

Hewlett-Packard warrants that its software and rmware designated by Hewlett-Packard for

use with an instrument will execute its programming instructions when prop erly installed on

that instrument. Hewlett-Packard do es not warrant that the operation of the instrument, or

software, or rmware will be uninterrupted or error-free.

Limitation of Warranty

inadequate

or

pro

MER

er

duct,

CKARD

A

CHANT

dication or

improp

or

ABILITY

er

foregoing

The

eration

op

b

tenance

main

misuse,

site preparation

NO

OTHER

W

SPECIFICALL

FITNESS

AND

y

t

arran

w

er,

Buy

y

outside

main

or

ARRANTY

DISCLAIMS

Y

AP

OR

F

not

shall

er-supplied

Buy

the en

of

tenance.

IS

TICULAR

AR

defects

to

apply

w

soft

vironmental

EXPRESSED

IMPLIED

THE

PURPOSE.

resulting

are or

interfacing,

ecications

sp

IMPLIED.

OR

ARRANTIES

W

improp

from

unauthorized mo

the

for

HEWLETT-P

OF

clusive

Ex

REMEDIES PR

THE

REMEDIES.

INDIRECT,

BASED

Remedies

HEWLETT-P

SPECIAL,

ON CONTRA

VIDED

O

A

INCIDENT

CT, TOR

HEREIN

CKARD

AL,

T, OR

BUYER'S

ARE

SHALL

OR

NOT

CONSEQUENTIAL

ANY OTHER

LIABLE

BE

LEGAL

SOLE

AND

OR

F

AMA

D

THEOR

CLUSIVE

EX

ANY

GES,

Y.

DIRECT,

WHETHER

xi

xii

Getting Started

This chapter shows you how to install and maintain the HP 71910A and its various options.

In addition, there is a procedure for installing an HP 70911A wide bandwidth IF module into

an existing HP 71209A Option 001 spectrum analyzer.

No sp ecial tools are required except for the pro cedure \To install an HP 70911A in your

HP 71209A." This procedure requires an 8 mm ball driver. Be careful to observe all notes,

cautions, and warnings in the pro cedures.

Contents

To install the receiver

o install

T

install

o

T

install

o

T

Main

T

Reinstalling

T

To

T

Returning the Receiver for Service

To return a receiver for service

Note

an Option

an

taining

the

clean

o

hange

c

o

hange

c

o

cate a

lo

o

install

o

install from

install

o

HP

the

HP

the

mo

Receiv

the

from

an

in

The following installation procedure applies to both the HP 71910A wide

bandwidth

surv

replaces

:::::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::: :::::::

receiv

011

to

70911A

70620B

Receiv

mainframe's

custom

dule's

the

a 3.5-inc

Option

eillance

in

preamp

er

:

70004A's

eypad

k

serial

ersonalit

P

er

memory

h

011

surv

receiv

HP

the

::

:

::

:

er

::

:

::

:

e

t

\P"

::

:

::

:

er

system,

display

:

::

:

::

:

::

:

and

:

::

:

::

:

the HP

.

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

bandwidth

wide

70207A

PC Displa

the

71910P

HP

71209A

HP

an

:

screen

fuse

n

disk

eillance

70004A

:

::

:

er

b

um

:

y

::

card

driv

ette

instrumen

::::::::::::: ::::::::::::::: :::::::::::::: ::::::::::

::::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::

receiv

a

In

er.

color

::

:

::

:

::

:

::

:

1-2

1-12

:

::

1-14

:

::

1-25

:

1-28

:

1-28

:

::

:

1-28

:

1-29

::

:

1-30

:

::

:

1-31

:

1-32

:

1-33

::

:

1-34

:

::

1-35

MMS

for

y

the \P" and \A" systems, only

There are no sp ecication c

module placemen

Refer to the

the HP 70207A PC Display for MMS, the MSIB interface card, and the MSIB

Y-cable that is used with a \P" system.

t and rear-panel cabling are dieren

HP 70207A

hanges b et

User's Guide

ween

t.

for complete installation instructions of

Getting

Started

1-1

To install the receiver

1. Inspect the shipping container or cushioning material for damage.

If there is damage or a defect, savethepacking materials, le a claim with the carrier,

then contact the nearest Hewlett-Packard sales and service oce for immediate repair

or replacement.

2. Make sure the instrument's line-voltage selectors are set to the same voltage as the power

source.

UTION

CA

Note

ARNING

W

cause

y

in-line

isolation

is

blo

the

oltage

v

wn

fuse)

Before

the

to

damage

Option

turning

correct

(a

400 instrumen

isolation transformer

instrumen

the

for

the

to

ts for

use

for

on, b

t

w

o

p

system

400 Hz

with

sure

e

source.

er

when

operation

HP

the

LINE

the

ailure

F

p

the

come

70001A

VOLTAGE

do

to

cable

er

w

o

with

mainframe.

this

an

is

external

SELECTOR

ma

plugged in.

The

transformer protects the user from shock hazard. The in-line isolation

transformer must be removed for 60 Hz p ower-source operation. Failure to

remove the in-line transformer may result in a blown fuse. The HP 70004A

display/mainframe does not require an option to op erate on 400 Hz.

ailure

F

the

not operate

Do

attached

in-line

Hz

400

a

isolation

option

transformer

receiv

for

the

HP

400

a

on

er

follow this precaution can result in personal injury

without

line

wer

po

Hz

70001A mainframe.

.

set

to

1-2

Getting

Started

3. If you're installing a standard HP 71910A, connect the rear-panel cables as shown in the

following gure:

Rear-Panel Connections for the Standard HP 71910A

Getting

Started

1-3

4. If you're installing an HP 71910A that has an option, connect the rear-panel cables as

shown in the following gure:

1-4

Getting

Rear-Panel Connections for the HP 71910A with Options

Started

5. If you're installing a standard HP 71910P, connect the rear-panel cables as shown in the

following gure:

71910P

Rear-P

Connections

anel

for

the

Standard

HP

Getting

Started

1-5

6. If you're installing a standard HP 71910P with two mainframes and an HP 70902A

IF section added, connect the rear-panel cables as shown in the following gure:

1-6

Rear-Panel Connections for the Standard HP 71910P with Two Mainframes and an

HP 70902A IF Section Added

Getting

Started

7. If you're installing a standard HP 71910P with two mainframes and an HP 70620B

preamplier added, connect the rear-panel cables as shown in the following gure:

Rear-Panel Connections for the Standard HP 71910P with Two Mainframes and an

HP 70620B Preamplifier Added

Getting

Started

1-7

8. If you're connecting the MSIB cables on an HP 71910A, connect the MSIB cables as

shown in the following gure:

Color

MSIB

OUT

connector

Connect

a.

and the

MSIB

Cabling

MSIB cable

an

70001A

HP

the

from

bet

mainframe's

HP

w

70001A

the

een

MSIB

Mainframe

70004A

HP

connector

IN

the

to

color

.

HP

displa

70004A

y's

y

Displa

b. Connect an MSIB cable b etween the HP 70001A mainframe's MSIB OUT connector

and the HP 70004A color display's MSIB IN connector.

The MSIB cables are connected serially, coupling the input of one elementtothe

output of the next until the loop is completed.

1-8

Getting

Started

9. If you're connecting the MSIB Y-Cable on an HP 71910P, connect the cables as shown in

the following gure:

CAUTION

Care should b e taken when connecting the MSIB Y-cable to the

MSIB interface card. Damage can occur if the MSIB Y-cable connection is

not prop erly aligned. Ensure p ower is not applied while making or removing

connections.

a. Remove the protective cap from the MSIB Y-cable and inspect the pins for damage or

misalignment.

Do not install MSIB Y-cable if pins are bent or damaged.

service from Hewlett-Packard. Refer to \Returning the Receiver for Service".

b. Align the MSIB Y-cable to the MSIB interface card's MSIB connector (1).

Do not force the connectors together!

(See the ab ove caution.)

c. Tighten the captive-screws on the MSIB Y-cable to the MSIB interface card.

Do not over tighten the screws!

d. Connect the two free-ends of the MSIB Y-cable (that are not connected to the

MSIB

OUT

and

the

displa

IN

input

.

y

of

one

HP

70001A

MSIB

The MSIB

the output

Connect

e.

terface

in

the ac

card

cables are

next un

of the

line cord

70001A

HP

the

to

)

connected serially

op

lo

til a

computer

our

y

to

mainframe's

, coupling

completed.

is

and

If necessary, obtain

.

connectors

(2)

mainframe

to

Note

Refer to the

70207A

HP

the

Y-cable.

HP 70207A User's Guide

for MMS

y

Displa

PC

for complete installation instructions of

MSIB

the

and

,

the

MSIB

terface

in

card

Getting

Started

1-9

10. Connect the power cables to both instrument mainframes rst, then plug the cables into

the p ower outlet.

11.

12.

13.

the

Set

tilation

ven

an

If

the45

Except

IF

the

HP

70004A

HP

LINE

on

sections

70001A

starts

fan

switc

IF

the

will

mainframe's

up.

displa

color

ON,

to

h

sections,

its

ve

ha

and

eac

ACT

y

h

4

b

is

listen

mo

ligh

LINE

5

eing

dule's

t

to

on.

switc

used

erify

v

fron

to

h

our

y

in

that the

t-panel

ON,

system

ACT

and

en

v

LED

listen to

h

(suc

tilation

should

v

as the

fan

erify

HP

starts

lit.

e

b

the

that

71910A),

up.

Only

one

set

of

14.

1-10

On

Getting

the

displa

Started

left-side

the

,

y

softk

gure

wing

follo

the

in

wn

sho

eys

should

b

ed.

y

displa

e

If the receiver menu softkeys do not appear after power-up, the display window

steps:

wing

follo

probably

a. Press

displa

b.

Press

eration.

op

c. Press

receiv

is

the

.

y

the

er.

not

4

DISPLA

NN

MENU

assigned

Y

N

INSTR

5

N

k

N

ey

ey on

k

NN

N

to

the receiv

to

the displa

N

softk

displa

ey

erform

t

softk

it, p

panel

is

er

eys

to

selected

for

o assign

er. T

fron

y's

receiv

the

til

un

en

sev

the

y

the

access

the

independen

for

stand-alone

main

op

men

t

eration

the

for

u

the

of

Getting

Started

1-11

To install an Option 011 receiver

1. Inspect the shipping container or cushioning material for damage.

If there is damage or a defect, save the packing materials, le a claim with the carrier,

then contact the nearest Hewlett-Packard sales and service oce for immediate repair or

replacement.

2. Connect the rear-panel cables as shown in one of the following two gures:

Connections

Standard

Rear-Panel Connections for Receiv

3. Make sure the HP 70001A mainframe's line-voltage selector is set to the same voltage as

the power source.

Rear-P

anel

er with Options

1-12

Getting

Started

CAUTION

Before turning the instrument on, be sure the

LINE VOLTAGE SELECTOR

is set

to the correct voltage for the power source. Failure to do this maycause

damage (a blown fuse) to the system when the power cable is plugged in.

400

for

instrumen

not

w

er

v

e

this

cable

400

the

operate

transformer

protects

ust

m

in-line

a

in-line

precaution

the

to

Note

ARNING

W

Connect

4.

w

o

p

er

the

outlet.

Option

isolation

transformer

remo

Do

attached

follo

o

p

5. Set the HP 70001A mainframe's45LINE

ts

for use

the

remo

e

b

transformer

Hz

400

isolation

can

HP

with the

user

ed

v

option

transformer

result

70001A

switch to ON, and listen to verify that the

ventilation fan starts up.

6. Check to see that each mo dule's front-panel

operation

Hz

sho

from

Hz

60

for

result in

y

ma

receiv

for the

personal

in

mainframe

ACT

LED lights.

HP

c

er

70001A

hazard.

k

w

o

p

on

injury

rst,

come with

er-source

wn

blo

a

400 Hz

a

70001A

HP

.

then plug

an external

mainframe.

in-line

The

operation.

fuse.

er

w

po

mainframe.

the cable

The

isolation

without

line

in-line

isolation

ailure

F

ailure

F

into

to

the

to

the

Getting

Started

1-13

To install an HP 70911A into an HP 71209A

This procedure shows you how to install an HP 70911A mo dule into an already existing HP

71209A Option 001 spectrum analyzer. Option 001 spectrum analyzers have an HP 70910A

wide-bandwidth RF mo dule instead of the standard HP 70909A RF mo dule.

Older HP 71209A Option 001 spectrum analyzers may need to be modied b efore you can

install the HP 70911A ultra-wide bandwidth section which includes options. This is explained

in the following paragraphs.

HP 70001A mainframe upgrade

If the HP 70001A mainframe has a serial number of 3327A05741 or earlier, an upgrade kit

must be installed that increases the power and airow capability. The serial number is located

by opening the HP 70001A's front-panel door to exp ose the hex-lo ck screws that are used for

installing mo dules. The serial number lab el is lo cated behind this door on the inside of the

right frame section.

WARNING

70900B

HP

70900B

HP

The

Press

memory

4

MENU

the

N

MORE

N

ROM VERSION

MByte

1.

2.

3.

4.

In order to provide proper cooling for the HP 70911A module which includes

number

serial

a

e

v

ha

serial

hav

date

must

and

e

number

service

that do

rm

de,

co

are

w

do

3327A05741

is

for

office

not include

follo

or

wing

940120

the

or

information

option

and

later

steps:

L

NN

N

O

5

left-side

N

NN

N

options,

the

3327A05741.

local

our

y

upgrade

an

require

the retrofit

upgrade

oscillator

cal

lo

option.

.

To

N

Misc

NN

N

1

N

NN

of

N

and

3

N

70001A

HP

the

If

Hewlett-P

HP

kit.

mo

the

view

N

softk

ey

N

then

mainframe

70001A

HP

ackard

70911A

kit.

m

dule

rm

.

N

NN

N

service

sales

modules

ust

are

w

N

.

higher

belo

cards

include

than

w,

installing

on

will

contact

not

the

1

When upgrading an existing HP 71209A Option 001, order the HP 70911A Option 099 or

098 to obtain the LO rmware and memory upgrade. An HP 71910A system already includes

these items. To determine which option (098 or 099) is required, do the following steps:

4

Press

1.

2.

3.

4.

Press

the

NNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNN

5. Find the

6. If the en

.

5

MENU

left-side

N

State

NNNNNNNNNNN

MORE 1 of 4

NNNNNNNNNNNNNNNNNNNN

EXTEND STATE

CPU:

heading

try reads

68000

N

NN

N

softk

NNNNNNNNNNNNNNNNNNNNNNNN

,

MORE 2 of 4

.

ey

NNNNNNNNNNN

, and then

NNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNN

show states

.

that is displa

yed on the screen.

, the HP 70911A Option 098 is required. If the

.

entry reads

68020

the HP 70911A Option 099 is required.

,

1-14

Getting

Started

HP 70910A RF section upgrade

The HP 71910A includes an HP 70910A RF section with rmware enhancements for

moderately faster tuning than older HP 70910A RF sections. HP 70910A's with serial number

3409A00170 and later include this newer rmware. The newer rmware is not necessary for

proper operation. Contact an HP service center for upgrade information.

Tools needed

Install the mo dule requires one of the following drivers:

8 mm hex-ball driver

(long)

(short)

::::::::::: ::::::::::::::: ::::::::::

:::::::::: ::::::::::::::: ::::::::::

HP part number 8710-1307

HP part number 8710-1651

Antistatic precautions

Electrical components are easily damaged by small amounts of static electricity. If possible,

work at a static-free work station.

Procedure

damage.

1.

2. T

3.

4.

ect

Insp

there

If

then

replacemen

or

on

urn

Press

the

urn

T

address

the

con

y

4

DISPLA

fron

map

shipping

damage

is

tact

HP

our

5

Y

t-panel

should

tainer

con

defect,

a

or

nearest Hewlett-P

the

t.

knob

ok

lo

Option

the

to

lik

71209A

and

then

or

left-side

scroll

the

e

cushioning

ethe

v

sa

ard

ack

ectrum

sp

001

N

NN

N

Address

address

the

displa

one

material

packing

sales

N

ed

y

N

Map

map

in

for

materials, le

service

and

analyzer.

N

NN

N

the

softk

so

follo

ey

that

.

the

wing

a claim

oce

mo

gure.

with

immediate

for

dules

are

the

sho

carrier,

repair

wn.

The

HP

ou

y

MMS

70911A

HP

70903A

need

y

ma

addressing,

and

to c

has

HP

hange

refer

default

a

70902A

the

Chapter

to

Address Map of HP 71209A

whic

3,18

the

The

of

ab

HP

follo

gure.

ve

o

70911A

wing

gure

MMS

dules

mo

address

in

of

11.

.

places

h

If

or

F

this

a

sho

b

it

space

general

the

ws

Getting

een

w

et

una

is

discussion

address

Started

the

ailable,

v

switc

of

hes

1-15

on the HP 70911A module. The switches are set to the default MMS address of ROW3

and COLUMN 18.

5. Turn o the ac line power to the HP 71209A, and removethe two line-p ower cords from

the mainframes.

1-16

Getting

Started

6. Open the HP 70001A mainframe's front-panel door to expose the hex-lock screw.

unlo

to

kwise

c

terclo

coun

olts

b

k

c

in

hex-lo

the

follo

wing

gure.

7.

Using

remo

e

v

mm hex-ball

an 8

t

the

w

o

blank

driver,

panels

turn the

wn

sho

and

k

c

8. Install the new HP 70911A mo dule next to the HP 70310A.

Getting

Started

1-17

1-18

Getting

Started

9. If you're installing a standard HP 70911A mo dule, connect the rear-panel cables as shown

in the following gure.

Note

Rear-Panel Connections for Standard Configuration

If you have an HP 71910P conguration, refer to the section, \To install the

hapter.

c

this

receiv

er",

whic

h

is

cated at

lo

the

eginning

b

of

Getting

Started

1-19

10. If you're installing an Option 001/002 HP 70911A mo dule, connect the rear-panel cables

as shown in the following gure.

1-20

Getting

Rear-Panel Connections for Option 001/002

Started

11. Connect the power cables to both instrument mainframes rst, then plug the cables into

the p ower outlet.

12.

13.

14.

15.

70001A mainframe's

HP

the

Set

HP

LINE

to see

ERR

fan

70004A

switc

that

only

LED

4

DISPLAY

tilation

en

v

an

If

the45

Check

system,

the

an

If

a. Press

b.

Press the left-side

starts

color

to

h

eac

the

remains

5

.

up.

is

y

displa

listen

and

ON,

dule's

mo

h

selected

is

that

one

k

hec

c

on,

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Address Map

4

5

eing

b

fron

LINE

used

to v

t-panel

switc

erify

will

the address

softkey.

to ON,

h

our

y

in

that

ACT

e

v

ha

map as

system (suc

the

ligh

LED

ACT

its

described

and

en

v

tilation

ts.

ligh

listen

h

When

on.

t

in the

as

to

fan

the

t

w

HP

starts

IF

o

follo

sections

wing

that

erify

v

c. Turn the front-panel knob to scroll the address map so that it lo oks similar the one

is

dules

mo

the

\b

of

follo

elo

wing

w"

gure. F

HP

the

70903A

in

wn

sho

addresses

W

O

R

70911A

HP

the

location of

follo

the

the empt

gure.

wing

(highest to

\ab

e

b

ust

m

OW addresses is not important.

yR

lo

v

o

Mak

est)

w

e" the

e

sure

are

HP

that

sho

as

70902A

the order

in

wn

and

the

71910A),

up.

steps.

that

h

suc

example,

or

The

.

are

set

in

the

Getting

Started

1-21

Example of a Correct Address Map

16. Press the

.

y

displa

17.

Press

displa

the

yed.

4

DISPLAY

NN

N

key on the display's front panel to access the main menu for the

N

NN

INSTR

softk

ey un

til

the

left-side

softk

eys

sho

wn

in

the

follo

wing

gure

are

18. Press the

4

MENU

5

key to displa

receiver.

19. Locate the memory card con

Locate the arro

20.

1-22

Getting

wprin

Started

ted on one end of the card.

y the sev

en softkeys for

taining the receiv

stand-alone operation of the

er p ersonalit

y.

21. Insert the card into the HP 70004A display's front-panel card slot. Match the card's

arrow with the arrow printed ab ove the card slot.

N

NN

N

22.

23.

24.

Press

4

5

MENU

NN

N

1

MORE

N

NN

HP-MSIB

and

N

NN

N

of 3

N

NN

N

CARD

then

N

and then

N

the

to

left-side

displa

N

Misc

NN

N

catalog

les

all

y

.

ey

softk

N

NN

MSI

&

con

.

tained

on

the

memory

card.

25.

26.

27.

28.

card's

2053

If

write-protect

incorrectly

HP-IB

address

NN

N

Press

LOAD

N

Press

ENTER

Storage

The

.

address

using

N

NN

FILE

N

NN

N

.

switc

HP-MSIB

and

the

NN

N

and

,

device

in

is

h

normally set

is

umeric

n

ter

en

error

SAFE

the

address

eypad.

k

for

1

is

the

displa

osition,

p

the

for

to 4.

le

n

ed,

y

If

um

or

card

the

er.

b

either

the

is

address

the

card

card's

same

is

missing,

is

HP-MSIB

address as

correct,

not

the

address

displa

the

ter

en

the

The front-panel LED next to the card slot lights indicating that the les are being

copied into the

4

USER

5

menu. This pro cess takes approximately 60 seconds.

NNNNNNNNNNNNNNNNNNNNNNN

.

e

b

y

visible.

Press

The

4

USER

left-side

and then

5

softk

eys,

RX_MODE

wn in

sho

to start

follo

the

wing

receiv

gure,

er

p

should

ersonalit

listed

is

y's

correct

Getting

Started

1-23

1-24

Getting

Started

To install an HP 70620B preamp

Tools needed

Install the mo dule requires one of the following drivers:

8 mm hex-ball driver

(long)

(short)

::::::::::: ::::::::::::::: ::::::::::

:::::::::: ::::::::::::::: ::::::::::

HP part number 8710-1307

HP part number 8710-1651

Procedure

1. Turn on your HP 71910A receiver.

2.

Press

4

DISPLAY

5

and then the left-side

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Address Map

softkey.

3. Turn the front-panel knob to scroll the address map so that the mo dules are shown. The

address map should look like the one displayed in the following gure.

Address

Map

71910A

HP

of

4. Locate the HP 70620B preamplier's address switch. Make sure that the switches are

set to a value of

ROW

6 and

COLUMN

19. This will position the HP 70620B b elowany

HP 70310A precision frequency reference that might be present.

from

cords

er

w

o

line-p

o

w

t

the

e

remov

5.

o

urn

T

mainframes.

the

the ac

line

71209A,

HP

the

to

er

w

o

p

and

Getting

Started

1-25

6. Open the HP 70001A mainframe's front-panel door to expose the hex-lock screw.

7. Using an 8 mm hex-ball driver, turn the hex-lo ck b olt to remove the blank panel that is

located to the right of the HP 70910A RF section.

8. Install the HP 70620B in the empty slot.

9. Connect a cable b etween the HP 70620B's front-panel

HP 70910A's front-pane

10. Set the HP 70001A mainframe's45LINE

11. Set the HP 70004A mainframe's45LINE

12. If an

ERR

LED remains on, check the address map as described in the following steps.

a. Press

b.

4

DISPLAY

Press the left-side

5

.

RF OUTPUT

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Address Map

connector.

switch to ON.

softkey.

RF INPUT

connector and the

c. Turn the front-panel knob to scroll the address map so that it lo oks similar the one

shown in the following gure. Your receiver maynothave an HP 70310A precision

that the

such

is

dules

mo

the

of

order

the

that

sure

e

to

Mak

w

lo

is

are as

est)

not imp

shown

ortant.

in the

following

gure.

The

cation

lo

frequency

addresses

R

y

empt

reference.

(highest

addresses

W

O

RO

of

W

the

Press

13.

display.

14.

Press the

displayed.

1-26

the

Getting

4

DISPLA

NNNNNNNN

k

5

Y

NNNNNNNNNNNNNNNNNNNNNNNN

NEXT INSTR

Started

on

ey

softkey un

Example

display's

the

Correct

a

of

panel

t

fron

til the left-side

Address

to

Map

access

softkeys sho

the

for

u

men

main

the

wn in the following gure are

15. Calibrate the twoavailable

71910A"

HP

\Calibrating

partial calibration

the

with HP

RF INPUT

in

70620B preamp."

s using the calibration procedure listed in

Chapter 3.

The pro

cedure is

entitled

\T

o

erform

p

a

Getting

Started

1-27

Maintaining the Receiver

The following procedures will help you to maintain the appearance and operation of the HP

71910A Wide-Bandwidth Surveillance Receiver.

To clean the HP 70004A's screen

Use a thin-lm cleaner and abrasion-free cleaning tissue or soft cloth to clean the display.

An example of a proper thin-lm cleaner is the Hewlett-Packard Display Cleaner (HP

part number 8500-2163).

CAUTION

Do not use hands or paper towels to clean the display's screen. These abrasive

materials may scratch the screen coating.

To change the mainframe's fuse

This procedure applies to either the HP 70001A mainframe or HP 70004A display/mainframe.

1.

T

urn

o

the

ac

line

to the

er

w

o

p

receiver,

and remo

ve

cables

er

w

o

line-p

the

from

er

w

o

p

the

outlet.

panel.

in

the

rear

follo

wing

2.

3.

Remov

fuse

The

a

Use

the

e

holder

small

w

o

line-p

lo

is

at-blade

cable

er

cated

screwdriv

is

from

the

line-p

to

er

connector

cable

er

w

o

out

prey

cated

lo

connector.

fuse

the

on

holder as

mainframe's

wn

sho

gure.

4. Chec

k the fuse

for damage. As sho

wn in the gure, a spare fuse is included in the assem

The metric 6.3A fuse (HP part number 2110-0703) can be used with b oth 120V and

230V power sources.

1-28

Getting

Started

bly.

To change the custom keypad

The custom keypad snaps into the HP 70004A mainframe's front panel. This keypad gives

you quick access to common instrument functions.

In the unlikely eventthatyou need to change the keypad, perform the following step:

Push the tip of a small at-bladed screwdriver

keypad will pop out.

CAUTION

Be sure to insert the screwdriver

custom keypad out.

straight

into the removal hole, and the

into the removal hole; do not pry the

Getting

Started

1-29

To locate a module's serial number

Atwo-part serial number appears on the mylar label attached to the front frame of the

modules. The rst four digits and the letter are the serial number prex; the last ve

digits, the sux. Identical receivers have the same prex, whichchanges only for signicant

modication. The sux is dierent for each receiver.

1. Open the front-panel door to expose the hex-lock screw.

2.

The

serial

n

um

frame.

t

dule's

mo

the

to

hed

attac

is

el

lab

er

b

fron

1-30

Getting

Started

Reinstalling the Receiver Personality

In the unlikely event that the receiver personality becomes corrupted or is deleted from

memory, this section shows how to reinstall it into the HP 71910A. To determine if the

receiver personality is installed, press

4

USER

5

and then

NNNNNNNNNNNNNNNNNNNNNNN

RX_MODE

. The receiver softkey menus

should app ear on the display.

Menu

ey

Softk

Receiv

er

copies

kup

Bac

Memory

3.5-inc

or

F

our

y

from

h

standard

71910A

HP

external

an

LIF format.

card.

disk

of

ette

HP

receiv

the

(HP-LIF

71910A

an

is

HP-IB

er

systems,

Option

disk

ersonalit

p

format).

cop

(without

011

e. The

driv

yare

the

y

diskette

pro

receiv

70004A

HP

in

vided

ersonalit

p

er

displa

containing

follo

the

y

y),

the receiv

wing

from

you

forms:

the

must

p

er

memory

copy

ersonalit

If

card.

the programs

the

uses

y

Getting

Started

1-31

To install from the memory card

1. Locate the memory card containing the receiver personality.

2. Locate the arrow printed on one end of the card.

3. Insert the card into the HP 70004A display's front-panel card slot. Match the card's arrow

with the arrow printed ab ove the card slot as shown in the following gure.

N

NN

N

Press

4.

5.

Press

6.

Press

If

write-protect

incorrectly

4

MENU

N

MORE

N

HP-MSIB

2053

and

5

N

NN

of

1

N

NN

N

CARD

Storage

switc

The

.

then

N

and

3

N

to

device

h

HP-MSIB

the

then

displa

in

is

left-side

error

the

N

Misc

N

NN

N

catalog

all les

y

displa

is

SAFE

p

address for

softk

N

NN

N

MSI

&

contained

ed,

y

osition,

the card

.

ey

N

.

either

or the

memory

the

on

card

the

card's HP-MSIB

same

is the

card.

missing,

is

address

the

address is

the

as

HP-IB address and is normally set to 4. If the address is not correct, enter the correct

address using the numeric keypad.

Press

The

into the

Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

LOAD FILE

N

NN

N

NN

N

ENTER

4

USER

.

t-panel LED

fron

4

USER

5

and then

5

, and enter 1 for the le number.

ligh

slot

card

the

to

NNNNNNNNNN

NNNNNNNNNNNNN

RX_MODE

to start the receiv

es appro

indicating

ts

ximately 60

er personality

the

that

seconds.

.

les are

7.

8.

9.

card's

displa

eing

b

listed

y's

copied

1-32

Getting

Started

To install from a 3.5-inch diskette drive

This procedure reinstalls the p ersonalityinto a standard HP 71910A system. If you havean

Option 011 system, perform the next procedure in this section. The disk drivemust b e a 3.5

inch, CS80-compatible drive, such as an HP 9122.

1. Connect a 3.5-inch diskette drive to the HP 70004A display or HP 70001A mainframe.

Use an HP-IB cable.

2. Insert the diskette containing the receiver personality into the diskette drive.

3. Press

4.

5.

6.

4

5

.

MENU

Press the left-side

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

MORE 1 of 3

NNNNNNNNNNNNNNNNNNNNNNN

Press

HP DISK

, and use the numeric keypad to enter the diskette drive's address.

NNNNNNNNNNNNNN

Misc

and then

softkey.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

catalog & MSI

.

The default address is 0, unit 0, and volume 0. New addresses are entered in the form

A.UV

, where:

er.

b

um

olume

unit

a

disk

address.

The

er.

n

external

an

ette is

unit

olume

V

um

n

er

b

er

b

not in

b

um

n

should

0

of

ette

disk

the driv

er

b

and

Press the

7.

8.

Press

9.

Press

is

A

U

is

or

0

is

V

hard

for

example,

or

F

er

b

um

n

HP-IB

2053

If

e's

driv

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

LOAD FILE

NNNNNNNNNNNNNNNNN

ENTER

digit from

a

digit

a

refers

and

1

digit

a

disk

0.

of

address

NN

N

ENTER

Storage

is

de

co

1to

0

from

to

0

from

es. So,

driv

tering

en

accesses

This

3.

N

softkey

device

incorrectly en

, and enter a1for the le number.

to reinstall the le.

30, represen

represen

9,

to

individual

an

represen

9,

to

for

indicates

3.00

a

.

error

tered.

reading

ette

disk

is

ting the

the

ting

disk

the

ting

disk

address

an

in

displa

driv

the

ed,

y

ettes,

e's

driv

n

unit

slot.

e

volume

the

of

driv

left

either

HP-IB

um

n

v

3,

eof

a

typically

is

are

ers

e

b

a

driv

0.

olume

v

e

e, or

used

at

the

10.

The front-panel LED next to the card slot lights indicating that the les are being

seconds.

y

60

.

Getting

Started

copied

Press

4

USER

in

to

5

to

the

and

4

USER

then

men

5

N

RX_MODE

u.

NN

N

This pro

N

to

cess

start

the

tak

appro

es

receiv

er

p

ximately

ersonalit

1-33

To install in an Option 011 instrument

This procedure reinstalls the p ersonality into an Option 011 instrument. It requires the use

of a computer and an HP-IB disk drive. The disk drivemust be a 3.5 inch, CS80-compatible

drive, such as an HP 9122.

In order to use this procedure, you must rst write a program that sends a string to the

HP 70900B instructing it to load the p ersonality. The string includes a \wait" command that

delays the loading of the p ersonality for 20 seconds. This pause gives you time to movethe

HP-IB cable from the computer to the disk drive. If you need more time, increase this wait

value in the command

WAIT 20

.

1. Write a program that sends the following string to the HP 70900B mo dule. (The HP-IB

address of the HP 70900B is equal to the HP-MSIB column address of the HP 70900B.)

MSI HPIB,0.1; WAIT 20; LOAD /RX/;

In the string, the digit 0 represents the disk drive's HP-IB address. The digit 1

represents the individual disk drive slot. This number is typically 0 or 1.

2. Use an HP-IB cable to connect the computer to the HP 70001A mainframe. Do not

computer.

connect

the

disk

driv

70001A

HP

the

to

e

mainframe

or

Insert

3.

Run

4.

complete

Disconnect

5.

driv

ait

W

6.

the

should

e

for

ette

disk

program

HP-IB

the

w

no

ersonalit

p

the

with

that

step.

cable

connected

e

b

y

the

ou

to

personalit

from

to

load in

in

the

to

wrote

to the

yin

1of

step

computer,

70001A

HP

the

disk driv

this pro

and

mainframe.

70900B

e.

cedure.

connect

.

seconds

20

e

v

ha

ou

Y

driv

disk

the

to

it

to

disk

The

e.

1-34

Getting

Started

Returning the Receiver for Service

Repackaging a receiver requires original shipping containers and materials or their equivalents.

Hewlett-Packard oces can provide packaging materials identical to the original materials.

Refer to Table 10-1 for the Hewlett-Packard sales and service oce nearest you.

CAUTION

Packaging materials not specied can result in instrument damage. Never

use styrene pellets to package electronic instruments. The p ellets do not

adequately cushion the instrument, do not prevent all instrumentmovement,

and can generate static electricity.

To return a receiver for service

1. Fill out a blue repair card (lo cated at the end of this chapter) and attach it to the

instrument. Send a copyofany noted error messages or other helpful performance data. If

a blue repair card is not available, include at least the following information:

a. Type of service required

Description of

b.

Name

c.

Return

d.

Mo

e.

f. F

List

g.

help

o

T

2.

materials.

instructions

a. W

F

b.

cardb

enough and

inc

and

del

serial

ull

of

rap

instrumen

or

oard

on

hes

telephone

address

ber

um

n

um

n

accessories

y

an

damage

t

en

Original

result

instrumen

ts

carton

strong enough

sides

all

the problem

um

n

of returned

returned

of

er

b

returned

during

shipping

acceptable

in

an

in

t

eigh

w

that

kg

159

of

instrumen

the

of

whether

and

tec

of

er

b

instrumen

with

transit,

materials

kaging.

pac

ti-static

than

less

lb) test

(350

to accommo

it

hnical

t

instrumen

k

pac

equiv

or

plastic

kg

54

strength. The

date the

pac

for

t

is

con

the

alen

to

(120

king

constan

tact

reduce

t

erson

p

t

instrumen

b

are

ts

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use

lb),

instrumen

material.

termitten

in

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wev

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est;

ossibilit

p

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a

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t.

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y

e

ust b

at

w

pac

follo

ESD

corrugated

oth

b

least

kaging

wing

damage.

large

three

c. Surround the equipment with three to four inches of packing material to protect the

module and to preventmovement in the carton. If packing foam is not available,

the b est alternative is S.D.-240 Air CapTMfrom Sealed Air Corporation, Hayward,

California 94545. Air Cap is plastic sheeting lled with 1-1/4 inch air bubbles. Use

material

this

in

times

eral

sev

pink

pro

an

vide

ti-static

sucien

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protection

t

rapping the

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also

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en

carton.

the

ement

v

mo

t

in

four

to

should

3. Seal the carton with strong

4. Mark the carton FRA

nylon adhesiv

GILE, HANDLE WITH CARE.

5. Retain copies of all shipping papers.

e tap e.

Getting

Started

1-35

1-36

Getting

Started

2

System Verification of Operation

Use automated tests to verify operation

The op eration verication tests for the HP 71910A are automated tests that are designed to

give a high condence level in the operation of the receiver in a reasonable time. For complete

information on requirements, loading, and running the verication test software, refer to the

HP 70000 Modular Spectrum Analyzer Instal lation and Verication Manual

.

Verify performance once every three years

It is recommended that a complete p erformance verication be p erformed once every three

y

b

or

ard

k

This

ears.

y

purchasing

e accomplished

b

can

the

HP

11990A System

either returning

by

Performanc

Hewlett-P

to

er

receiv

the

are.

w

soft

ests

T

e

ac

System

erification

V

Operation

of

2-1

2-2

System

erification

V

Operation

of

Operating

This chapter shows how to perform measurements using the HP 71910A. Measurements

generally involve the following two steps:

1. Use the instrument's sp ectrum analyzer features to search for a signal.

2. Switch the HP 71910A to receiver mo de to downconvert the signal for signal collection.

Entering receiver mo de replaces the standard spectrum analyzer softkey menus with new

receiver menus. Refer to Chapter 6 for diagrams of the receiver menus. Diagrams of the

spectrum analyzer menus are lo cated in the

Manual

Contents

.

:

Calibrating the

erform

p

o

T

erform

p

o

T

hing

Searc

cating

Lo

c

o

T

return

o

T

c

o

T

c

o

T

Using

Resolving Signals

Reducing Displayed Noise

Controlling the Sweep

Changing

Collecting Signals (receiv

Changing to

Selecting IF Outputs and Channel Filters

Mark

view

o

T

To resolve closely spaced signals

To reduce the displayed noise

Tochange the sweep time

set

o

T

change the cen

To

To switc

To select a new signal

To return to spectrum analyzer mode

select

o

T

adjust

To

c

o

T

increase

o

T

HP 71910A

calibration

a

calibration

a

Signals

for

Signals

hange

hange the

hange

the

to

the

ers

signal

a

tinuous

con

ter-F

Cen

Receiver Mode

h to receiv

an

the

(sp

:

frequency

full

reference

amplitude

:

::

requency

output

IF

IF-to-video

321.4

:

HP

with

ectrum

:

span

:

using mark

:

::

or

ter frequency step size

er mo de)

er mo de

and

analyzer mo

:

range

:

::

:

and

el

lev

units

:

::

:

ers

:

::::::::::::::: ::::::::::::::: ::::::::::::::: :::::::::::::

:::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::: ::::

::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::

single

sw

Step

:::::::::

:::::::::::::: :::::::

::::::

:::::::

:

::

:

bandwidth

video

bandwidth

MHz

HP 70000 Modular Spectrum Analyzer Operating

:

::

:

::

:

::

:

::

:

::

:

::

70620B

:

::

:

::::::::::::: ::::::::::::::: ::::::::::::::: ::::::::

eeps

Size

::::::::::: :::::::

:

preamp

de)

:

::

:

::

:

amplitude

:

::

:

:::::::::::: ::::::::::::::: ::::::::::::::: ::::::

:

::

:

:::::::::::::: :::

:::::::::::: :::::::::::::

::::::::::::::: ::::::::::::::: :::::::::::::

:::::::::::::: ::::::::::::::: :::::::::::::

:

ratio

:

::

:

scale

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

:::::::::::: :::::::::::

::::::::::::: ::::::::::::

::::::::::: :::::::::::

:::::::::::: :::::::::::::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

:::::::::::: ::::::

::::::::::

::::::::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

3

:

::

3-11

:

3-11

3-12

3-13

3-14

:

3-14

3-15

3-17

3-19

3-20

3-23

:

3-23

:

3-23

:

3-3

3-5

3-6

3-7

3-8

3-9

Operating

3-1

(preselector bypass)

To adjust the IF gain and RF attenuation

To select an Option 007 channel lter

Demodulating Signals

To demodulate the signal

To adjust IQ gain, oset, and quadrature

Viewing the Signal's Average Amplitude Level

To view the average amplitude

Measurement Examples

To search for and collect a pulsed RF signal

Tocharacterize a wide-bandwidth FM signal

Tocharacterize a wide-bandwidth digital transmission

Manually Collecting Signals

Using Manual Mode

To manually enter collection receiver mo de

To search for and collect a pulsed RF signal

Using a Preamplier

To use the HP 70620B preamp

o turn

T

Extending

trolling

Con

o

T

o

T

o

T

o

T

o

T

k

c

Blo

ou

Y

If

If the PREAMP On O softkey doesn't work

If there is a frequency shift in an HP 70911A output

o the

F

the

System

a receiv

ve

sa

delete

or

recall

o

w

t

view

e

v

Ha

ossible

the

title

Problem

a

is

and

compression

blank

write a

Diagrams

UNCOR

UNCAL and

UNCAL

P

::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::

preamp

requency

Conguration

state

er

a

instrumen

y

displa

the

on

:

y

displa

Usable

::::::::::: ::::::::::::::: ::::::::::::::: :::::::::::::: :::

::::::::::::: ::::::::::::::: :::::::::::::::

:::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::: :::::

:::::::::::: ::::::::::::::: ::::::::::::::: :::::::::::::

:::::::::::: :::::::::::::: ::::::::::::::: :::::::::

:::::::::::::: ::::::::::::::: :::::::::::::: ::::::::::::::: ::

:::::::::::::: ::::::::::::::: ::::::::::::::: :::::::::::::::

::::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::::: :::::

::::::::::: ::::::::::::::: ::::::::::::::: ::::::::::::

:

de

mo

er

receiv

in

::

:

::

:

displa

::

:

Mixers

:

::

:

::

Range

receiv

t

:

screen

:

ed

RBW

VBW

is

:

er

windo

:

::

:

::

:

::

displa

with

:

state

ws

:

::

:

limited

ed

y

External

::

:

is

::

:::::::::::: ::::::::::::::: ::::::::::::

:::::::::: ::::::::::::::: ::::::::::::::

::::::::::: ::::::::::::::: :::::::::::

::::::::::: ::::::::::::::: ::::::::::

::::::::::::: ::::::::::::::

:::::::::::::: ::::::::::::::: :::::::::

:::::::::::::: ::::::::::::::: :::::::::::

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

::

:

ed

y

:

::

:

ed

y

:

::

:

::::::::::::: ::::::::::::::: ::::::::::

::::::::::::: :::::::::::::: ::::

::

:

::

:

3-24

3-26

3-28

3-30

3-31

3-36

3-41

3-44

3-46

3-47

3-49

3-52

3-53

:

3-53

:

3-54

3-55

:

3-56

:

3-58

:

3-59

:

3-59

:

3-60

:

3-62

:

3-65

:

3-66

:

3-67

:

3-68

3-69

:

3-70

3-71

3-2

Operating

Calibrating the HP 71910A

The built-in calibration routine described in this section ensures maximum frequency

and amplitude accuracy as specied in Chapter 5 of this manual. The calibration routine

determines amplitude and frequency error factors for a number of parameters. For example, a

temperature compensation routine is included which decreases temperature induced errors on

the HP 70911A. Calibration only requires a few minutes to run.

To perform a calibration

1. Connect the HP 70900B mo dule's front-panel

front-panel

2. Press

3.

Press the left-side

4.

Press

The

perform

o

T

pro

This

the

on

is

Connect

1.

t-panel

fron

Press

2.

3.

Press

4.

Press

RF INPUT

4

5

.

MENU

NNNNNNNNNNNNNNNNNNNNNNN

CAL ALL

calibration

a

cedure

HP

calibrates

70910A

the HP

RF

4

5

MENU

left-side

the

N

NN

N

select

.

N

NNNNNNNNNNNNNNNNN

Amptd

.

tak

RF

70900B

INPUT

NN

N

input

connector.

softkey.

three

es

with

the

section

mo

connector.

N

State

N

NN

and

four

or

HP

instrumen

one

and

dule's

.

ey

softk

NN

N

then

IN

utes

min

70620B

for

t

input is

t-panel

fron

N

RF

2

oth

b

N

70910A

connector.

NN

N

5. Press the left-side

Press

NNNNNNNNNNNNNNNNNNNNNNN

CAL ALL

6.

N

Amptd

softkey.

. The calibration takes three or four minutes to complete.

CALIBRATOR

complete.

to

preamp

INPUT

RF

the

on

CALIBRATOR

N

NN

N

to

to the HP 70910A RF section's

input connector

preamp.

HP

70910A's

HP

One

70910A

RF

connectors.

70620B

HP

select

to

the

RF

INPUT

section's

7. When the calibration is nished, disconnect the cable from the HP 70910A RF section's

INPUT

t-panel

fron

INPUT

RF

connector.

8. Press the left-side

NNNNNNNNNNNNNNNNNNNNNNNNN

9.

NNNNNNNNNNNN

Press

select input

INPUT

connector.

10. Press the left-side

Press

NNNNNNNNNNNNNNNNNNNNNNN

CAL ALL

. The calibration takes three or four minutes to complete.

11.

connector, and

N

NN

N

State

softkey

N

and then

NNNN

NNNNNNNNNNNNN

Amptd

softkey

connect

.

NNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNN

IN 1 70620B

.

70620B

HP

the

to

cable

the

to select HP 70620B preamplier's

preamplier's

RF

Operating

RF

3-3

Searching for Signals (spectrum analyzer mode)

This section shows you two metho ds of searching for signals using the spectrum analyzer

functions. With the rst method, signals are located bychanging the displayed frequency

and amplitude range. The second method makes use of powerful marker functions. If your

wide-bandwidth surveillance receiver is an Option 011 single mainframe conguration, this

search capability will only be available through programming via the HP-IB bus.

Additional sp ectrum analyzer capabilities are described in the

HP 70900B Instruments

and includes explanations of the following features:

HP 70900B User's Guide for

Three separate color traces.

Smart marker features including next p eak, signal track, and marker pause.

Oversweep capability for faster sweeps.

Limit lines and audible beeps for detecting signals ab ove a threshold.

Three dimensional waterfall displays for time varying signals.

start-up

its

to

all

op

range

op

than

erate

ually

t

erating

MHz

3

as

is

will

Collecting

parameters

normal

a

used for

limit

Note

an

at

If

press the

ving

ha

not

Do

signals.

analyzer.

MHz to

10

of

hes.

searc

hapter.

c

time

y

front-panel

turn

to

a

select

ou

y

If

example,

or

F

100

more

or

F

wan

you

4

w

o

p

the

resolution

the

do,

MHz,

information,

return

tto

ey.

5

k

IP

o.

er

bandwidth

instrumen

only

since

displa

instrumen

the

This resets

wider

not

will

t

linear

dynamic

ed

y

to

refer

detection

\Man

while

its

condition,

without

hing

searc

ectrum

sp

bandwidths

IF

for

use

Signals"

for

signal

in

this

3-4

Operating

Locating Signals

Locating a signal is as easy as setting the frequency range and amplitude scale. When the

receiver is rst turned on, the frequency range is set to the full 100 Hz to 26.5 GHz span. Use

the

NNNNNNNNNNNNNN

Freq

menutochange the frequency range. Use the

NNNNNNNNNNNNNNNNN

Amptd

menuto change the reference

level and scale. By selecting the softkeys on these twomenus, you can view and search for

signals.

Note

In addition to using the softkey menus, don't forget the corresp onding

front-panel keys. For example, to set the frequency range and reference level

use

4

CENTER

5,4

SPAN

5,4

START

5,4

STOP

5

,and

4

REF LEVEL

5

.

Operating

3-5

The position of the reference level is lo cated at the top of the display.

signal

N

Freq

NN

N

CENTER

range

to

N

softk

N

NN

the fron

ey.

N

softk

t-panel

.

ey

RF

INPUT

connector.

change

o

T

Connect

1.

2.

Press the

3.

Press

the

frequency

input

an

left-side

t-side

righ

4. Rotate the front-panel knob and watch the displayed frequency range move.

NNNNNNNNNNNNNNNNNNNN

After pressing

CENTER

, it becomes the active function, and its value is displayed in the

active function area. You can change the value using the knob, step keys, or numeric

keypad.

N

NN

5.

N

Press

SPAN

You can also

displa

,

and

hange

c

the

change the measuremen

ed

y

frequency

t range b

span.

y using the

N

NN

N

START

N

and

N

NN

N

STOP

change the limits of the frequency range.

N

softkeys to

3-6

Operating

To return to full span

1.

Press the left-side

Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FULL SPAN

2.

NNNNNNNNNNNNNN

Freq

.

softkey.

To change the reference level and amplitude scale

1.

Press the left-side

Press

NNNNNNNNNNNNNNNNNNNNNNN

REF LVL

2.

NNNNNNNNNNNNNNNNN

Amptd

softkey.

,andchange the reference level using the knob, step keys, or numeric

keypad.

3.

Press

NNNNNNNNNNNNNNNNNNNN

LINEAR

to select a linear scale, or press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

LOG dB/DIV

Then, enter the scale using the knob, step keys, or numeric keypad.

To change the amplitude units

menu

N

NN

UNITS

selection

N

selects

N

NN

N

selects

NNNNNNNNNNNNNNNNN

Amptd

.

NN

N

AutoMan

is

annotation

softkey.

N

allo

receiv

the

annotation

the

ws

default

er's

in decib

w

in

receiv

els

atts.

to

er

setting.

relativ

select

to

e

the annotation

mW.

1

1.

Press the left-side

Press

Pressing

The

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

units

NN

N

Auto

2.

Pressing

NN

A

N

dBm

N

WATT

to select a logarithmic scale.

automatically.

Operating

3-7

Using Markers

Markers are small diamond shaped icons that can b e moved to anytracepoint on the display.

Markers provide a fast and powerful to ol for centering signals on the screen. The frequency

and amplitude of the marked trace point are displayed at the top of the screen.

To view a signal using markers

1. Press

4

PEAK SEARCH

5

to activate a marker and place it on the highest trace point.

2. If the signal you wanttocenter is not the highest peak, rotate the knob to place the

marker at the desired peak.

3. Press the left-side

N

NN

N

NN

N

Press

wing

follo

Operating

N

->

CF

to

gure.

4.

3-8

NNNNNNNNNNNNNNNNNNNNNNN

markers

e

v

mo

the

softkey.

mark

ed

signal

to

the

cen

ter

of the

screen

as

sho

wn

in

the

5. Press

pulsed RF

4

5

,andusethe

SPAN

signal in

a 500

495

key to reduce the frequency range. Here is an example of a

span.

MHz

Operating

3-9

Resolving Signals

Often, two signals are closely spaced in frequency. The ability to display such signals as two

distinct responses is determined by the instrument's resolution bandwidth setting. Normally,

the sp ectrum analyzer automatically selects the optimum resolution bandwidth based on

the selected frequency span. As the following gures show, a resolution bandwidth that is

too wide causes adjacent signals to app ear as one. If a wide resolution bandwidth can hide

signals, why not always use the narrowest p ossible resolution bandwidth? The answer is that

as the resolution bandwidth is reduced, the sweep time increases and mayslowdown signal

searches. Manual resolution bandwidths are indicated by an asterisk (*RB) next to the screen

annotation.

N

Bandwidth

signals

N

NN

N

.

softk

ey

w

Narro

.

T

1.

2.

3.

o

resolve

Press

Resolution

Wide

closely spaced

N

NN

N

AutoMan

N

BW,Swp

N

NN

left-side

the

N

NN

BW

RES

495

to reduce the resolution bandwidth. Or, use the knob or numeric keypad to enter

a reduced resolution bandwidth.

4. To return to auto coupled resolution bandwidths, press the

that

NNNNNNNNNNNNNN

Auto

underlined.

is

Resolution

er

Bandwidth

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

RES BW AutoMan

softkey so

3-10

Operating

Reducing Displayed Noise

The displayed noise level (peak-to-peak noise variation) can be averaged bychanging the video

bandwidth or byaveraging successive traces. Changing the resolution bandwidth changes the

absolute level. Normally, the video bandwidth is coupled to the resolution bandwidth and is

automatically set. Manually entering a video bandwidth breaks this coupling. Manual video

bandwidths are indicated by an asterisk (*VB) next to the screen annotation.

KHz

3

displa

video

Press

the

bandwidth:

left-side

the

NN

N

BW

VID

o

T

reduce

Via

1.

2.

bandwidth.

3.

o

T

that

return

NNNNNNNNNNNNNN

Auto

to

is underlined.

Via video averaging:

1.

Press the left-side

clear-write

Press

2.

3.

Press the

ter the n

4. En

trace a

5.

Press

mo

N

NN

N

MORE

NNNNNNNNNNNNNNNN

VID AVG On Off

umber of sw

verages.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

VID AVG On Off

N

AutoMan

auto

de.

N

NN

1of

Filtering

Video

noise

ed

y

N

NN

N

BW,Swp

N

NN

N

coupled

NNNNNNNNNNNNNNNNNNNN

Traces

N

NN

N

and

4

NNNNNNNNNNNNNNNNNNNNNNNNN

Filtering

Video

Hz

10

N

softk

N

and

video

.

ey

the

use

bandwidths,

knob,

umeric

n

press

eypad,

k

the

NN

N

VID

4

or

N

NN

N

BW

N

k

5

9

NN

N

AutoMan

ey

NN

reduce

to

N

NN

softkey to enter the Traces menu. Trace A must be in the

N

NN

N

NN

N

NN

N

then

MORE

NNN

softkey so that

eeps to a

NNNNNNNNNNN

to

Off

2of

verage the displa

and then

.

4

NNNNNNNN

On

is underlined.

yed trace.

Or, use the default of 100

NNNNNNNN

On

to restart averaging at any time.

N

softk

the

ey

video

so

Operating

3-11

Controlling the Sweep

The sweep speed is automatically set by the receiver. In fact, the receiver always uses the

fastest sweep possible while still maintaining a calibrated display.Manually setting the sweep

time disrupts the coupling used to maintain a calibrated display. Whenever a sweep time is

selected that degrades accuracy, the uncalibrated warning,

UNCAL

, appears on the display.

To change the sweep time

1.

Press the left-side

NNNNNNNNNNNNNNNNNNNN

BW,Swp

softkey.

2. Use the knob, step keys, or numeric keypad to enter the desired sweep time.

3.

To reestablish sweep time coupling, press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SWPTIME AutoMan

so that

NNNNNNNNNNNNNN

Auto

is underlined.

To set continuous or single sweeps

1.

Press the left-side

NNNNNNNNNNNNNNNNNNNN

BW,Swp

softkey.

2. Press one of the following softkeys:

N

CONT

N

NN

N

SINGLE

o

T

SWEEP

N

rep

NN

N

SWEEP

another

eat

to

N

tinuous

con

use

N

sw

to

eep

the

single

sweeping.

measuremen

sweep,

press

range

t

N

SINGLE

N

NN

N

once.

N

SWEEP

N

again.

3-12

Operating

Changing Center-Frequency Step Size

When center frequency is the active function, pressing the

485

and

495

keys steps the center

frequency to a new value. The default step size is one tenth of the displayed frequency span.

You can change the size of the steps to meet your search needs. The value you enter does not

depend upon the displayed span; you can jump to frequencies that are not currently displayed.

To change the center frequency step size

1.

Press the left-side

2.

Press the

3.

Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

MORE 1 of 2

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FREQ STEP AutoMan

NNNNNNNNNNNNNN

Freq

softkey.

and use the knob, step keys, or numeric keypad to enter a new

center frequency step size.

4. Press

5. Press

4

CENTER

485or495

5

to activate the center frequency function.

to step the center frequency.

Operating

3-13

Collecting Signals (receiver mode)

This section shows you how to use the receiver mo de. Entering receiver mo de changes

instrument op eration in the following manner:

Displays receiver menus.

Sets xed-tuned op eration (zero span with the display showing amplitude versus time.)

Sets center frequency to the marker frequency or, if no marker is displayed, to the frequency

of the highest amplitude input signal.

Sets amplitude scale to linear.

Places reference level relative to the highest p eak.

The reference level is set to the next highest multiple of 10 dB from the peak's value. For

example, if the signal peak measures 26 dBm, the reference level is set to 30 dBm.

Downconverts the signal for analysis.

Selects a 10 MHz or wider IF bandwidth.

Selects a 10 MHz or wider video bandwidth.

Selects AM demo dulation.

Provides visual feedback that the signal is present (an amplitude versus time display). Only

or

linear

to

Press

detection

10 MHz.

4

5

USER

to

en

(not

ter

receiv

logarithmic)

de.

er mo

is

ailable

v

a

when

bandwidths

IF

are

greater

than

equal

3-14

Operating

Note

Receiver mo de is actually a special program called a \personality" or

\downloadable program." Personalities provides new menus and features and

are accessed through the front-panel

personalities. To learn how to create your own personalities, refer to the

70900B Programmer's Guide for HP 70900B Instruments

4

USER

5

key.You can even write your own

.

HP

Note

Due to harmonic mixing process utilized in the receiver, the signals at the IF,

FM, and IQ outputs will be inverted when the receiver is tuned to frequencies

of 12.8 GHz and below. The \minus" mixing mo de is used for this tuning

range. The \plus" mixing mode is used when the receiver is tuned from 12.6

to 26.5 GHz, so no inversion occurs for this range.

In receiver mode, online help is available for each softkey.To access online help, press the

left-side

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Help On Off

softkey so that

NNNNNNNN

On

is underlined. Then, press a softkey to learn about

its application.

Note

Online Help for

IF GAIN AutoMan

The receiver mo de is accessed with the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

use manyofthekeys found under the

to

use

access

the

certain

ectrum

sp

functions,

analyzer

such

functions

NNNNNNNNNNNNNNNNNNNNNNN

as

CAL

found

4

USER

4

MENU

ALL

Softkey

5

key. In addition, it is p ossible to

5

key,suchasmarkers. However,

de,

mo

er

in

,

rst

the

exit the

4

MENU

5

receiv

ey

k

area.

Operating

and

3-15

Changing to Receiver Mode

The procedures in this section showyou how to switchbetween receiver and spectrum

analyzer modes. In receiver mode, a small display shows the input signal's amplitude versus

time. Use this displayto quickly conrm that the signal is present and that the receiver

is properly tuned. For convenience, this xed-tuned display can be changed to the normal

spectrum analyzer display. This allows you to select another signal for down conversion

without leaving receiver mo de. Because a linear amplitude scale is used (and a linear

detector), the displayed dynamic range is limited.

To switch to receiver mode

NNNNNNNNNNNNNNNNNNNNNNN

1. Press

4

USER

5

and then

RX_MODE

.

If there are no markers shown on the screen, the instrument automatically tunes to the

highest displayed p eak.

If a marker is on, the instrument tunes to the signal at the marked frequency.

NNNNNNNNNNNNNNNNNNNNN

The

RX_MODE

Softkey

2. Once the receiver is x-tuned to the desired signal, the downconverted IF signal is available

at the HP 70911A module's rear panel for processing.

standard

The

vide

pro

outputs including Option 007 c

on IF

rear-panel

additional

70

MHz

IF

output

140

and

cen

is

MHz

tered

IF

at 321.4

signals

MHz.

respectiv

Option

.

ely

hannel lters, refer to the next section in this

001

information

more

or

F

002

and

chapter.

3-16

Operating

3.

demo

o

T

a.

Press

t

Connect

b.

output

clearly

yp

e

N

AM

and

dulate

of

N

the

left-side

the

dulation

demo

N

and

PULSE

pro

005

appropriate

the

connector.

ed

mark

N

vide

N

if

wncon

do

N

NN

N

Demod

N

demo

additional

AM

those

The receiver personality menus.

erform

and

p

then

press

signal,

erted

v

N

softk

ey

,

desired.

standard

dulation

external

pulse

and

options

I/Q

are

formats

and

test

are

formats

FM

equipmen

accessed via

presen

t.

the

t

the

to

the

wing steps:

follo

softk

on

ectiv

resp

the

VIDEO

ey that

the HP

ely

t-panel

fron

output.

corresponds

71910A. Option

.

dulation

demo

and

FM

to the

I/Q

004

are

Note

demo

The

regardless

necessary

is

VIDEO

connector.

dulated

whether

of

toggle b

to

outputs

they are

etw

The softk

alw

are

selected b

een AM

also

ey

\on"

ys

a

and pulse

toggles

y

at the

the

mo

w

et

b

front-panel

N

Demod

des

FM

een

N

softk

whic

connectors,

. The

ey

share

h

wideband

softkey

the

and

same

FM

narrowband which share the sameFMconnector. The softkey also oers

certain adjustments to the FM and IQ modes as described in this chapter.

Operating

3-17

To select a new signal

Press

NNNNNNNNNNNNNN

SPAN

.

1.

2. Use the front-panel knob, step keys, or numeric keypad to change the displayed frequency

span.

3.

Press the left-side

Press

NNNNNNNNNNNNNNNNNNNN

CENTER

4.

NNNNNNNNNNNNNN

Freq

softkey.

, and use the front-panel knob, step keys, or numeric keypad to enter a new

receiver frequency.

5.

To return to xed-tuned op eration, press

NNNNNNNNNNNNNN

SPAN

and enter a span of 0 Hz.

To return to spectrum analyzer mode

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press the left-side

Return to S/A

softkey, and select one of the following to return to the

search receiver mo de:

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

LAST STATE

to return the spectrum analyzer to the state it was in before the personality

was started.

N

NN

N

NN

N

FULL

Instrumen

GHz

N

NN

N

NARROW

y

displa

bandwidth

IF

SPAN

N

SPAN

the

N

input

N

to

N

NN

return

t

N

to

not

is

Preset

return

signal.

c

ectrum

sp

the

condition.)

sp

the

(The

hanged.)

ectrum

span

analyzer

to

set

is

a

to

its

to

alue

v

widest

frequency

a

ten

of

frequency span.

wide

span

IF

the

times

(100 Hz

enough

bandwidth.

| 26.5

to

The

3-18

Operating

Selecting IF Outputs and Channel Filters

The IF outputs are available at the HP 70911A module's rear panel.

Standard IF Outputs

002

requiremen

atten

of

dB

of

ts

uation

the

is

a

external

ailable

v

of the

level

The

applying RF

IF signal

atten

uation

can b

IF

or

Option

adjusted

e

gain.

001

Up

and

to

Option

to

65

the

Outputs

IF

The amount of gain applied to the input signal is displayed on the screen as

represents the gain from the front-panel

MHz

output connector. Without an HP 70620B preamplier present, the

RF INPUT

connector to the Option 001 rear-panel

RF/IF Gain

by the following equation:

attenuation

F

R

0

ain

Fg

I

=

Gain

F

=I

F

R

information

more

or

F

on

is calculated,

gain

this

w

ho

refer

\RF/IF

to

Gain"

equipmen

steps.

5dB

in

RF/IF Gain

is dened

Chapter

in

y

b

t

. This

70

7.

Operating

3-19

With 0 dB RF attenuation and 0 dB IF gain, the RF/IF gain from the HP 70910A's

ws:

follo

as

:

::

:

steps

is

:

::

:

::

using

applied;

+5

:

::

:

0

::

:

::

10

0

:

::

:

steps

dB

1

or

eys

k

step

the

there

no

is

automatic

gain

connector to

MHz

321.4

MHz

70

MHz

140

apply

can

ou

Y

knob or

the

trol.

con

the HP

IF

output

IF

data

output

to

up

try

en

70911A's IF

:

::

:

::

of IF

dB

70

This

eys.

k

output

:

gain

::

:

in

connectors

:

::

:

dB

10

ually

man

is

RF INPUT

dB

using

output

oscilloscop

an

at

has

e

Note

When

the

Option 001

rear-panel

degraded

ou need

If y

321.4

bandwidth

IF

preserv

to

or

002

MHz

accuracy

the

e

installed,

is

OUT

OPT

phase

321.4

the

connector.

.

information

MHz

This

of

321.4

signal,

a

IF

is

MHz

use

ailable

v

a

or deep-memory IF digitizer to process the 70 MHz IF output of the receiver.

If you're downconverting signals b etween 2.7 and 26.5 GHz, you must turn o the microwave

preselector to obtain the widest possible IF bandwidth. For example, if you select a 100 MHz

bandwidth,

IF

greater than

to

but

36

the

MHz

micro

at

e preselector

v

a

w

HP

the

70911A's

on,

is

321.4

the

MHz

eectiv

output.

IF

bandwidth

e

This

will

is sho

wn

in

the

limited

e

b

following table:

3-20

Operating

Approximate Widest Bandwidth of HP 70911A IF Outputs

Frequency 321.4 MHz

Output

100 Hz|2.9 GHz>48 MHz 40 MHz>48 MHz

2.7|26.5 GHz

preselector on

preselector o 100 MHz 40 MHz 70 MHz

1

Option 001

2

Option 002

3

The preselector's bandwidth increases at higher

frequencies and is nearly 60 MHz at a center frequency

of 20 GHz.

>

36 MHz3>

70 MHz

Output

36 MHz>36 MHz

140 MHz

1

Output

2

Operating

3-21

To select an IF output

The 321.4 MHz IF output is always available at the HP 70911A mo dule's rear panel.

On Option 001 instruments, the 70 MHz IF output is always available. On Option 002

instruments, the 140 MHz IF output is always available.

To adjust the IF and video bandwidth

NNNNNNNN

1.

Press the left-side

Press

NNNNNNNNNNNNNNNNN

IF BW

2.

BW

softkey.

, and use the front-panel knob, step keys, or numeric keypad to change the IF

bandwidth. The IF lters are adjustable in 10% increments (10 MHz, 11.1 MHz, 12.2 MHz,

etc.) using the knob. The lters are synchronously tuned (Gaussian approximation).

NNNNNNNNNNN

When

bandwidth. To recouple these parameters, press the softkey so that

Man

is underlined in the softkey, the IF bandwidth is uncoupling from the video

NNNNNNNNNNNNNN

Auto

is underlined.

3. Press

4.

Press

MORE 1 of 2

.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

VID BW AutoMan

, and use the front-panel knob, step keys, or numeric keypad to

change the video bandwidth.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

NN

N

When

Man

bandwidth.

N

underlined

is

recouple

o

T

in the

these

softk

parameters,

To change the IF-to-video bandwidth ratio

NNNN

NNNNNNNNNNNN

NNNN

BW

softkey

.

, and use the front-panel knob, step keys, or numeric keypad to

1.

Press the left-side

2.

3.

3-22

NNNNNNNNNNNNNNNNNNNNNNN

Press

MORE 1 of 2

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

c

VBW/IFB RATIO

hange

the ratio.

Operating

ey

,

the

bandwidth

IF

press

the

softk

uncoupling

is

that

ey so

N

Auto

from

N

NN

N

is

IF

the

underlined.

To increase the 321.4 MHz bandwidth (preselector bypass)

1.

Press the left-side

2.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

PRESEL On Off

NNNNNNNN

BW

softkey.

so that

NNNNNNNNNNN

Off

is underlined.

To adjust the IF gain and RF attenuation

1.

Press the left-side

2.

To adjust the IF gain, press

NNNNNNNNNNNNNN

Gain

softkey.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

IF GAIN AutoMan

, and use the front-panel knob, step keys, or

numeric keypad to change the displayed value.

3.

To adjust the RF attenuation, press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

RF ATTN AutoMan

, and use the front-panel knob, step

keys, or numeric keypad to change the displayed value.

The amount of gain applied to the input signal from the RF input connector to the 70

MHz IF output is displayed on the screen as

RF/IF Gain

.

To select an Option 007 channel filter

With

MHz

gure

output

Note

Option

path.

IF

shows

on

to the

hed in

switc

e

b

can

5

lters

lter.

MHz

of 1.25,

It

Channel

5, 10,

as

w

20, and

created

Filter

y

b

MHz.

36

viewing

007

These

the shap

separate

a

installed,

lters

of

e

ectrum

sp

yshev

Cheb

vide bandwidths

pro

MHz

5

the

analyzer.

Option

hannel

c

hannel

c

007

This procedure requires that Option 007 be installed in the HP 71910A

Option 001

follo

The

MHz

70

the

.

70

wing

1. With Option 007 installed, press the left-side

NNNNNNNN

BW

softkey.

Operating

3-23

The gure shown above is an example of a custom channel lter option which includes a

hannel

c

IF

lter

2.

3.

Press

15 MHz

are

bandwidth lter

ailable

v

a

N

NN

channel

a softk

N

NN

N

bandwidth.

N

1.25

N

NN

N

BYPASS

MHz

N

to

N

ey

N

,

N

factory-installed

as

N

NN

N

filters

select

to

N

NN

N

MHz

5

en

N

,

10

y

an

t

instead of

and

of

one

N

NN

N

MHz

hannel

c

then

the

N

,

a

options.

N

NN

70

follo

N

NN

N

MHz

20

ltering.

20

N

MHz

wing

N

,

MHz

N

.

or

bandwidth

hoices:

c

N

NN

N

MHz

36

the

Custom

desired

lter.

N

select

to

lters

3-24

Operating

Demodulating Signals

The video outputs are available on the HP 70911A mo dule's front panel. The default

demodulation is AM. When the receiver mode is started, any amplitude modulation

information present on the signal is demo dulated and made available at the HP 70911A

module's front-panel

VIDEO

connector.

y

If

Analog

FM

ha

ou

(Option

e

v

IQ

Option

an

(Option

005)

004

004)

or

Option

Standard

receiv

005

Video Output

follo

the

er,

wing

outputs

are

ailable:

v

a

Optional

Outputs

Operating

3-25

Two FM discriminator gains are available

Option 005 provides FM discriminators selections for 10 MHz and 40 MHz deviation.

The discriminator is based on a delay line design. Mo dulation frequencies up to half the

bandwidth can b e demodulated (up to 12 MHz maximum). For example, with a deviation of

10 MHz, a modulation frequency of 5 MHz can be processed.

Use analog IQ for constellation displays

Option 004 analog IQ demodulation is useful for applications requiring constellation displays.

You'll need a two-channel oscilloscop e in X-Y mo de to display a constellation. Because each

output has a bandwidth of 50 MHz, the overall bandwidth is 100 MHz.

You can adjust the gain, oset, and quadrature of the IQ outputs. The oset should be

adjusted to zero volts for each output. Quadrature adjusts the phase dierence b etween the

outputs to 90and, along with gain, is used to optimize the shape of constellations that are

displayed on an oscilloscop e.

If maximum bandwidth is important

an

In situations

o

tage

an

adv

where maxim

70

using

er

v

um bandwidth

140

or

MHz

dulation

demo

IQ

the

t,

ortan

imp

is

do

wn

con

ersion

v

as

shown

in the

oers

following

table.

Option

001

002

004

MHz

70

MHz

140

Analog

Bandwidth

IF

IQ

Comparison

Bandwidth

MHz

40

MHz

70

MHz

100

3-26

Operating

To demodulate the signal

1.

Press the left-side

NNNNNNNNNNNNNNNNN

Demod

softkey.

2. Select from one of the following demodulation formats:

NNNNNNNN

AM

selects AM demo dulation of the downconverted signal. The demodulated output is

available at the front-panel

VIDEO

connector. (video bandwidth = 0.3 x IF bandwidth.)

NNNNNNNNNNNNNNNNN

PULSE

at the front-panel

selects pulse demo dulation of the IF signal. The demodulated output is available

VIDEO

connector. (Video bandwidth is set to 100 MHz.)

NNNNNNNNNNNNNNNNN

FM WB

selects wide-bandwidth FM demodulation of the IF signal. This softkey is

only available on Option 005 instruments. The demodulated output is available at

the front-panelFMconnector. (FM peak-to-peak deviation of 40 MHz or less can b e

demodulated.)

NNNNNNNNNNNNNNNNN

FM NB

selects narrow-bandwidth FM demodulation of the IF signal. This softkey is

only available on Option 005 instruments. The demodulated output is available at

the front-panelFMconnector. (FM peak-to-peak deviation of 10 MHz or less can b e

dulated.)

demo

N

NN

N

selects

IQ

instrumen

004

analog

ts.

IQ

The

cessing

pro

output

is

of

ailable

v

a

the

IF

signal.

at the

softk

This

front-panel

ey

I

is only

and

av

connectors.

Q

ailable on

Option

adjusted

tly

enden

indep

e

b

fron

can

this

in

t-panel

section.

and

I

outputs

Q

so

adjust

o

T

Connect an

1.

oset

The

describ

IQ

and gain

in

ed

offset,

gain,

oscilloscop

\T

adjust

o

of the

quadrature

and

or

e

and

I

gain

IQ

oltmeter

v

Q

and

to

hannels

c

oset"

the

monitored.

N

NN

N

softkey

N

or

N

Demod

.

N

NN

N

Q GAIN

.

ey

softk

N

and rotate the front-panel knob to adjust the gain of each output

2.

3.

4.

Press

left-side

the

N

the

IQ

N

NN

N

IGAIN

so that they are equal.

The displayed gain setting is a unitless digital-to-analog (DAC) value b etween 0 and

4095.

5.

Press

output

N

NN

N

OFFSET

I

zero

to

The displa

N

NN

N

or

N

NN

N

OFFSET

Q

N

volts.

yed oset setting is a unitless digital-to-analog (D

N

NN

N

,

and

rotate

the

fron

t-panel

knob

adjust

to

AC) v

the

alue b et

N

4095.

6. Press

NNNNNNNNNNNNNNN

QUADRATURE

and rotate the fron

t-panel knob to optimize the shape of the displa

NNNNNNNNNNNNNNNNN

constellation,.

as

they

that

oset

ween 0 and

can

of eac

yed

e

b

h

The displayed oset setting is a unitless digital-to-analog (DAC) value between 0 and

4095.

Operating

3-27

Viewing the Signal's Average Amplitude Level

You can display the signal's average amplitude level in receiver mo de. The average is

computed at the end of every sweep and is shown in either linear or logarithmic units. You

can select the units that are used.

To view the average amplitude

1.

Press the left-side

Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

units menu

2.

NNNNNNNNNNNNNN

Gain

.

softkey.

3. Press the softkey corresp onding to the desired units.

To return to the default units, press

4.

5.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

prev menu

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

SIG LVL On Off

.

to display the average amplitude value.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

A UNITS AutoMan

so that

NNNNNNNNNNNNNN

Auto

is underlined.

Note

dulated

mo

Pulse

desensitization)

detector bandwidth

peak

signals

will ha

having

lo

ve

of

w

er

the

narrow

erage

v

a

digitizing

pulse widths

readings

el

lev

are

hardw

(and corresp

actual

than

displa

to

used

onding

to

due

the

y

large

the

signal.

3-28

Operating

Measurement Examples

The following measurement examples provide step-by-step instructions on using the receiver.

To search for and collect a pulsed RF signal

This procedure shows how to search for and collect (demo dulate) a pulsed RF signal.

The demo dulated video signal is viewed on an HP 70703A Digitizing Oscilloscope. (The

HP 70703A is sold separately and is not included in with the HP 71910A.) Of course, you can

substitute any suitable oscilloscope.

The HP 70703A oscilloscop e's 8 bit, 20 Ms/s digitizer is useful for signals which are greater

than 100 MHz in bandwidth and are rep etitive in nature. Because the oscilloscope is an MMS

product both its display and that of the sp ectrum analyzer can b e viewed simultaneously on

the screen.

1. Connect the signal to the HP 71910A's front-panel

2. Connect the HP 70911A's front-panel

VIDEO

connector to the HP 70703A oscilloscope's

front-panel channel1connector.

4

to

press

signal, use

place a

PEAK

marker

SEARCH

the

on

5

4

the

to

osition

p

PEAK

3.

4.

the

On

If this

t-panel

fron

HP

is not

71910A,

the desired

knob

RF INPUT

mark

a

ey.

5

k

terest.

in

of

connector.

on

er

Or, press

the

N

Marker

highest

NN

N

NN

signal.

and

use the

5.

Press

Receiv

cen

4

USER

ters

er

5

the

and

mo

then

will

de

signal

N

RX_MODE

erform

p

and

N

x

N

tunes

N

ersonalit

p

er

receiv

the

start

to

er

mark

no

if

h

searc

eak

p

a

the

lo

oscillator

cal

(zero

has

span).

b

.

y

een

turned

then

It

on.

Operating

3-29

6. Press the left-side

the

Notice

that

NNNNNNNN

BW

NN

N

IF

softkey.

N

NN

BW

N

function

automatically

is

selected.

7.

8.

Press

the

If

the

signal's

underlined.

step

This

need

ou

y

If

9.

a.

Press

selected.

the

Use

b.

10.

Press the left-side

This sets the video bandwidth equal to 100 MHz bandwidth. With the default AM

demodulation, the video bandwidth is equal to approximately one third the value of the

IF bandwidth.

11.

12.

13.

Press

DISPLA

the

NNNNNNNNNNN

build window

4

Press

Notice that when t

screen is remo

4

ey

k

5

"

cen

increases

adjust

to

left-side

the

4

and

5

#

.

5

Y

left-side

NNNNNNNNNNNNNNNNNNNNNNNNN

wice

t

ter

N

Demod

N

Config

ved.

4

N

set

to

frequency

bandwidth b

the

IF

the

N

NN

N

Gain

eys

k

5

"

NN

N

softkey and then press

N

NN

N

NN

and then

wo windo

bandwidth

IF

the

ve

o

ab

is

erform

p

gain,

N

softk

to

N

NN

N

Display

ey

hange

c

N

NN

N

NNNNNNNNNNN

The

.

N

softk

NNNNNNNNNNNNNNNNNNNNNNNNN

STACK 2 WINDOWS

ws are displa

GHz,

2.7

turning

y

the

N

NN

N

GAIN

IF

gain

IF

the

.

ey

yed, the receiv

follo

N

NNNNNNNNNNN

100

to

press

the

o

wing

N

AutoMan

to a

N

PULSE

.

MHz.

N

PRESEL

micro

On

e

v

a

w

N

NN

N

steps:

N

NN

N

function

suitable for

value

NN

N

.

er's small frequency-v

N

Off

so

preselector

automatically

is

the signal

that

ersus-time

N

Off

N

lev

N

is

el.

3-30

Operating

14.

15.

Press

The

4

INSTR

.

5

left-side

oscilloscop

N

NN

N

70703A

e's

N

softk

eys

ey

no

to

w

select

app

the

ear.

oscilloscop

instrumen

e

activ

the

as

e

t

w.

windo

16.

17.

Press

4

USER

N

NN

N

AUTO

N

to

5

N

SCALE

N

displa

N

NN

N

.

y additional

oscilloscop

e

softk

eys.

Operating

3-31

18. If the sweep time needs to be adjusted, perform the following steps:

a. Press the

b.

c.

19.

Press the

Press

Press the

4

USER

NNNNNNNNNNNNNNNNNNNNNNN

SEC/DIV

4

MENU

4

5

MENU

5

key.

,and change the sweep time as needed.

5

key.

NNNNNNNNNNNNNNNNNNNNNNN

key so that the left-side

Trigger

softkey is displayed.

20. Use the front-panel knob to adjust the trigger level for a stable display.

21.

22.

23.

Press

the

N

more

4

INSTR

left-side

N

NN

N

1of

and

5

N

Measure

N

4

then

N

,

NN

and

N

70900B

N

softk

select

N

.

ey

er

ts.

men

us.

desired

the

N

NN

return

to

measuremen

the receiv

to

3-32

Operating

24. To search for another pulse signal to downconvert, do the follo wing steps:

Note

a. Press

b.

Press

c.

Press

4

5

to view the receiver p ersonality's menus.

USER

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Return to S/A

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FULL SPAN

Since

will

the

app

.

receiv

ear

random.

.

er is

no

longer

in

zero

span

(x

tuned),

oscilloscop

the

displa

e

y

Operating

3-33

To characterize a wide-bandwidth FM signal

This procedure demonstrates howtocharacterize frequency chirp that is presentona

radar pulse. The demodulated video signal is viewed on an MMS HP 70703A Digitizing

Oscilloscope. The HP 70703A is not part of the HP 71910A and must be ordered separately.

Of course, you can substitute any suitable oscilloscope.

Note

1. Connect the signal to the HP 71910A's front-panel

2.

Press the left-side

3.

Press

In order to perform this task, the HP 71910A must have Option 005 installed.

RF INPUT

connector.

NNNNNNNNNNNNNNNNNNNN

BW,Swp

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SWPTIME AutoMan,415

softkey.

, and then

NNNNN

s

to increase the sweep time to 1 second.

Increasing the sweep time allows the spectral lobes of the radar signal to be viewed.

4. Repeat the following steps until a main lob e of the signal is displayed as shown in the

4

the

gure:

PEAK

fron

SEARCH

t-panel

.

5

knob

or

4

marker

ed

y

displa

the

place

to

ey

k

5

on the

following

Press

a.

Use

b.

signal.

N

NN

N

to

and

displa

N

Marker

cen

use

ter

yed.

the

softk

signal.

4

5

#

.

ey

main lob

the

that

so

frequency

reduce

to

ey

k

the

span

c.

d.

e.

Press

the

N

NN

N

->

4

SP

signal

left-side

N

CF

,

5

AN

are

es

of

Note

3-34

Operating

Because

er

receiv

oid

v

a

o

T

b

span

the

ersonalit

p

this,

efore

displa

the

tering

en

ed

y

may

y

follo

wing

the

ectrum

sp

not

receiv

e

b

steps

er

ma

able

man

mo

y

ha

to

ually

de.

e

v

iden

several

tify

place

the

eak

p

correct

sp

amplitudes,

ter

cen

ectrum

analyzer

the

frequency

in

.

zero

5. Press

press

4

CENTER

4

SPAN

5

and rotate the front panel knob to center the displayed response. Then,

5,405

, and then

NNNNNNNN

Hz

.

6. Connect HP 70911A's front-panelFMconnector to the HP 70703A oscilloscope module's

front-panel channel1connector.

7. Press

8.

9.

4

5

.

USER

NNNNNNNNNNNNNNNNNNNNNNN

Press

RX_MODE

.

Press the left-side

NNNNNNNN

BW

softkey.

NNNNNNNNNNNNNNNNN

Notice that the

10. Press the

11.

If the signal's center frequency is above 2.7 GHz, press

4"5

IF BW

function is automatically selected.

key several times to set the IF bandwidth to 100 MHz.

underlined.

This step increases the bandwidth bybypassing the microwave preselector

12.

If

a.

ou

y

Press

need

the

adjust

to

left-side

the

N

Gain

N

IF

N

gain, p

softk

erform the

.The

ey

N

IF

N

selected.

IF

the

.

MHz)

(40

13.

14.

b. Use

Press

This

the

N

FM

selects

4

5

and

#

left-side

N

NN

N

.

WB

the FM

4

eys to

5

k

"

N

NN

N

Demod

softk

wide-bandwidth

hange

c

ey

following

N

NN

N

AutoMan

GAIN

gain.

discriminator.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PRESEL On Off

steps:

NN

N

function is

so that

Off

automatically

NNNNNNNNNNN

is

15.

16.

17.

Press

4

DISPLAY

left-side

the

N

NN

build

5

N

window

.

N

NN

N

Config

N

and

N

NN

N

Display

then

N

NN

STACK

N

NN

N

softk

N

2

ey.

N

NN

N

WINDOWS

N

.

Operating

3-35

Notice that when two windows are displayed, the receiver's small frequency versus time

screen is not displayed.

18. Press

19.

4

5

INSTR

Press left-side

.

NNNNNNNNNNNNNNNNNNNN

70703A

softkey to select the oscilloscop e as the active instrument window.

The oscilloscop e's softkeys now appear.

20. Press

21.

22.

4

USER

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

AUTO SCALE

Press the

5

to display additional oscilloscope softkeys.

.

NNNNNNNNNNNNNNNNNNNNNNN

4

5

MENU

key so that the left-side

Trigger

softkey is displayed.

NNNNNNNNNNNNNNNNNNNNNNN

You may need to press

Trigger

several times.

23. Use the front-panel knob to adjust the trigger level for a stable display.

Note

24. If the sw

a. Press the

b.

Press

c.

Press the

25.

Press

the

measuremen

N

Press

26.

3-36

more

Operating

Due to the harmonic mixing process utilized in the receiver, frequency chirps

may appear backwards. That is, negative sloped chirps may displayshowing

positive slop e and visa versa. This phenomena occurs in frequency bands

where a minus mixing mo de is used (100 Hz | 12.8 GHz). Because the HP

MHz,

40

71910A's

ha

hirps

c

FM demo

wider

a

ving

dulator

bandwidth

has

maxim

a

will app

um

ear

eep time needs to be adjusted, perform the follo

4

5

key.

USER

NNNNNNNNNNNNNNNNN

NNNNNN

SEC/DIV

4

MENU

left-side

and then use the

5

key.

N

NN

N

Measure

softk

ey

,

4

#

and

5

and

use

4

5

keys to c

"

the

righ

t-side

bandwidth

distorted.

wing steps:

hange

men

of

the sweep time.

erform

p

to

us

v

ts.

N

NN

N

desired

and select

,

4

of

1

the

measuremen

ts.

frequency

arious

Note

The HP 70703A oscilloscop e display shows amplitude versus time. To obtain

frequency versus time, you must perform an appropriate calibration.

27. Press

28. To search for another pulse signal to downconvert, do the follo wing steps:

4

a. Press

b.

Press

c.

Press

5

INSTR

and then

4

5

.

USER

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Return to S/A

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FULL SPAN

NNNNNNNNNNNNNNNNNNNN

70900B

.

to return to the receiver menus.

.

Operating

3-37

To characterize a wide-bandwidth digital transmission

This procedure shows how to display modulation constellations on an oscilloscop e display.

The gures in this procedure are of an HP 54602A oscilloscope. You can substitute any

suitable oscilloscope.

Note

In order to perform this pro cedure, the HP 71910A must have Option 004

installed.

1. Connect the signal to the HP 71910A's front-panel

RF INPUT

connector.

2. Connect the HP 70911A's front-panelIoutput to one of the oscilloscope's input channels.

3. Connect the HP 70911A'sQoutput to another oscilloscop e input channel.

4. Repeat the following steps until the signal is displayed as shown in the following gure:

a. Press

b. Use the front-panel knob or

4

PEAK SEARCH

5

.

4

NEXT PEAK

5

key to place the displayed marker on the

signal.

NN

N

to

and

displa

N

Marker

cen

use

ter

y

the

ed.

the

softkey

signal.

4

k

5

#

ey

.

to

reduce

frequency

the

span

so

that

the

main

lob

c.

d.

e.

Press

the

signal

the left-side

N

NN

N

CF

->

4

,

5

AN

SP

are

es

of

5. Press

6.

4

USER

Press the left-side

Notice

7.

8.

3-38

Press

Operating

the

5

and then

the

that

4

ey

k

5

"

left-side

NNNNNNN

N

BW

NNNNNNNNNNNNNNNNN

IF

eral

sev

N

Demod

NNNNNNNNNNNNNNNN

NNNNNNN

RX_MODE

softkey.

function

BW

times

N

softk

to

ey

.

is

set

.

automatically

bandwidth

IF

the

selected.

to

100

MHz.

9.

Press

NNNNNNNN

IQ

and then

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

prev menu

.

Note

10.

Congure

follo

the

do

The IQ output signals are always present. Pressing IQ displays a menuthat

allows you to adjust the gain, oset, and quadrature of the channels.

oscilloscop

the

wing

steps:

example,

or

eration.

op

XY

for

e

F

on

54602A

HP

an

oscilloscop

e,

Note

a.

b.

c.

d.

Press

Adjust

4

Autoscale

4

Main

N

XY

the

Dela

N

.

5

ed

y

horizon

.

tered.

tal

and

ertical

v

ositions

p

that the

so

display

ed pattern

is cen

Oscilloscope Display of 16 QAM Modulation

The constellation spins because the input signal and the receiver are not tuned

c

lo

not

are

bases

time

to

the

exact

same

frequency

words,

other

In

.

their

k

ed.

11.

minimize

least

at

or

stop,

o

T

the

Operating

3-39

steps:

wing

follo

the

do

spin,

a.

On the HP 71910A, press the left-side

b.

c.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

CF STEP AutoMan,415

Press

4

CENTER

5

.

, and then

NNNNNNNNNNNNNN

Freq

NNNNNNNN

Hz

softkey.

.

d. Press the

display reaches its slowest spin rate.

This step may require 10 or 20 key presses. If the constellation's spinning do es

not slowdown, the center frequency of the receiver may not b e close enough to

the carrier's frequency. Change the receiver's center frequency to be closer to the

frequency of the carrier.

4"5or4#5

key repeatedly until the constellation pattern on the oscilloscope's

3-40

Operating

Manually Collecting Signals

If the receiver personality becomes erased and a backup media is not available, manual

operation without the personality is possible. This section describ es manual operation.

Chapter 1 contains a procedure for reinstalling the receiver personality.

Disadvantage of manually collecting signals

The disadvantage of manually collecting signals is that you lo ose the following capabilities

that are only available from the receiver menus:

Ability to use Option 007 70 MHz IF channel lters.

Access to the Option 005 FM discriminator selection.

Ability to adjust Option 005 FM oset.

Ability to adjust Option 004 IQ gain, oset, and quadrature.

el.

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routine.

Operating

3-41

Spectrum analyzer operation

As long as the resolution bandwidth (IF bandwidth) is 3 MHz or less, the spectrum analyzer

operates normally.However, when a resolution bandwidth of 10 MHz or greater is selected,

spectrum analyzer operation works within the following limitations:

Logarithmic amplitude detection is no longer available.

This limits the displayed dynamic range to approximately 35 dB. Although a linear

detector is employed, signals are displayed using a logarithmic display format.

Widest peak detection bandwidth is 3 MHz.

Fastest digitizer rate in HP 70900B module is 80 kHz

IF bandwidths

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signal,

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ually

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3-42

Operating

Agilent 71910A User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Getting Started

System Verification of Operation

Operating