Hp 8555a Service manual

HEWLETT

PACKARD

OPERATING

AND

SERVICE

MANUAL

SPECTRUM

ANALYZER

RF

SECTION

8555A

SERIAL

NUMBERS

This manual applies directly

to

serial numbers

prefixed

l436A.

With modifications described in Section VII this

manual also applies

to

serial numbers prefixed

987,

1043A,

1114A,

1116A,

1138A,

1143A,

1203A,

1219A, 1232A, 1311A,

1325A,

and

1326A,

1343A,

1416A,

and

1429A.

For

additional

important

information

about

serial

numbers see

"Instruments

Covered

by

Manual"

in

Section

I.

COMPANY

1971,1974

1400

FOUNTAIN

GROVE

PARKWAY,

SANTA

ROSA.

CALIFORNIA,

95404,

U.S.A.

MANUAL

PART

NUMBER

08555·90027

MICROFICHE

PART

NUMBER

08555·90028 Printed:

AUGUST

1974

Model8555A

Warnings/Cautions

SAFETY I

wARNINGS

I

GROUNDING

If

this

instrument

is

to

be

energized via

an

auto-

transformer for voltage

reduction,

make sure

the

common

terminal

is

connected

to

the

earthed

pole

of

the

power

source.

BEFORE SWITCHING ON THIS INSTRUMENT,

the

protective

earth

terminals

of

this

instrument

must

be

connected

to

the

protective

conductor

of

the

(mains)

power

cord.

The

mains plug shall only

be

inserted in a

socket

outlet

provided with a

protective

earth

contact.

The

protective

action

must

not

be negated by

the

use

of

an

extension

cord

(power cable)

without

a protective

conductor

(grounding).

Make sure

that

only fuses

with

the

required

rated

current

and

of

the

specified

type

(normal blow,

time

delay, etc.) are used for replacement.

The

use

of

repaired fuses

and

the

short-circuiting

of

fuse

holders

must

be avoided.

Whenever

it

is likely

that

the

protection

offered

by

fuses has been impaired,

the

instrument

must

be

made inoperative

and

be

secured against

any

unin-

tended

operation.

GROUNDING

BEFORE SWITCHING

ON

TI-IIS

INSTRUMENT,

ensure

that

all devices

connected

to

this

instrument

are connected

to

the

protective (earth) ground.

BEFORE SWITCHING ON THIS INSTRUMENT,

ensure

that

the

line

power

(mains) plug

is

con-

nected

to

a

three-conductor

line power

outlet

that

Any

interruption

of

the

protective

(grounding)

conductor

(inside

or

outside

the

instrument)

or

disconnecting

the

protective

earth

terminal

is likely

to

make this

instrument

dangerous.

Intentional

interruption

is

prohibited.

HIGH VOLTAGE

Any adjustment,

maintenance,

and

repair

of

the

opened

instrument

under

voltage should be

avoided as

much

as possible

and,

when

inevitable,

should

be

carried

out

only

by

a skilled

person

who

is aware

of

the

hazard involved.

Capacitors inside

the

instrument

may

still be

charged even

if

the

instrument

has

been

discon-

nected

from its source

of

supply.

Adjustments

and

Service described

herein

is

per-

formed with power supplied

to

the

instrument

while protective covers are removed. Energy avail-

able

at

many

points

may,

if

contacted,

result in

personal injury.

has a protective (earth) ground.

(Grounding

one

conductor

of

a

two-conductor

outlet

is

not

sufficient.)

LINE VOLTAGE SELECTION

BEFORE SWITCHING

ON

THIS INSTRUMENT,

make sure

the

instrument

is

set

to

the

voltage

of

the

power

source.

vii

General

Information

Model8555A

MODEL 8555A

Figure 1-1.

Model8555A

Spectrum

Analyzer

RF

Section

with

8552B

IF Section and

141T

Display Section

1-0

Model

8555A

General

Information

SECTION

I

GENERAL

INFORMATION

1-1. INTRODUCTION

1-2. This manual

contains

all

information

required

to

install,

operate,

test,

adjust

and

service

the

Hewlett-Packard Model

8555A

Spectrum

Analyzer

RF

Section. This section covers

instrument

identi-

fication, description, options, accessories,

specifica~

tions

and

other

basic

information.

1-3. Figure 1-1 shows

the

Hewlett-Packard Model

8555A

Spectrum

Analyzer

RF

Section with

the

Model 8552B

Spectrum

Analyzer

IF

Section

and

the

Model141

T Display Section.

1-4. The various sections in this manual provide

information as follows:

SECTION II, INSTALLATION, provides in-

formation relative

to

incoming inspection,

power requirements, mounting, packing

and

shipping, etc.

SECTION III, OPERATION, provides infor-

mation relative

to

operating

the

instrument.

SECTION IV, PERFORMANCE TESTS, pro-

vides

information

required

to

ascertain

that

the

instrument

is performing in accordance

with published specifications.

SECTION V, ADJUSTMENTS, provides infor-

mation required

to

properly adjust and align

the

instrument

after

repairs are made.

SECTION VI, REPLACEABLE PARTS, pro-

vides ordering

information

for all replaceable

parts and assemblies.

SECTION VII, MANUAL CHANGES, nor-

mally will

contain

no

relevant

information

in

the

original issue

of

a manual. This section

is

reserved

to

provide back-dated

and

up-dated

information in manual revisions or reprints.

SECTION VIII, SERVICE, includes all in-

formation required

to

service

the

instrument.

1-5. On

the

title

page

of

this manual, below

the

manual part number, is a "'Microfiche" part

num~

ber. This

number

may

be

used

to

order

4 x 6-inch

microfilm transparencies

of

the

manual. Each

microfiche

contains

UIJ

to

60

photo-duplicates

of

the

manual pages.

The

microfiche package also

includes

the

latest

Manual Changes

supplement

as

well

as

all

pertinent

Service Notes.

1-6. WARNINGS AND CAUTIONS

1-7. WARNING. Ensure

that

the

Spectrum

Analy-

zer

and any

device\

connected

to

it

are

both

properly

grounded

to

the

same

power

line ground.

An

interrupted

path

from

earth

ground

to

an

mstrument

chassis safety

ground

(an

open

third-

wire

ground

lead in a cord;

for

example,

see Figure

1-2 below) can develop a

potential

(V) equal

to

one

half

of

the

power line voltage. This

may

cause

a shock hazard as well as damage

to

the

instru-

ment.

~

v

iC

HOT

1

..

LINE

OPENS

)AC

NEUTRAL

,I

-~

Figure 1-2. Circuit

if

.Equipment

Ground Lead Opens

1-8. CAUTION. The

input

circuits

of

the

Model

8555A

are susceptible

to

burnout

if

fed an exces-

sively high signal level.

To

avoid

costly

repairs

and

unnecessary

down

time

the

following precautions

must

be

taken:

1.

Use maximum

attenuation

when

applying

signals

of

unknown

amplitude.

2. Ensure

that

the

Spectrum

Analyzer

Display Section

and

any

signal source

to

be

coupled to

the

Spectrum

Analyzer are

both

connected

to

the

same power-line

ground

before

connecting

an

RF

cable

to

the

8555A

RF

Input.

It

has

been

estab-

lished

by

HP

that

floating

either

instru-

ment

from ground

may

cause damage

to

the

Spectrum Analyzer

input

mixer

assembly.

3. The

input

attenuation

setting

should

not

be

changed while

de

is

applied

to

the

RF

Input.

4.

Do

not

connect

impulse generators

to

the

Model

8555A

RF

Input

unless

they

are

connected

through a Model

8445A

Pre-

selector.

1-1

General

Information

5. Observe

the

following

maximum

input

levels:

Maximum

PO:wer

Volts

Input

Levels

dBm

Watts

De

Rms

Peak

Input

.01·18

GHz

+33

1

2'

±20

2

10

14.4

Connector

Incident

on

In-

+10

10

mW

±20

2

0.707

1.0

put

Mixer

1

The

Input

Attenuation

Control

must

be

in

the

30

dB

or

greater

position

when

applying

+33

dBm

or

input

Mixer

will

be

dam·

aged.

The

power

levels

listed

apply

for

peak

or

average

power.

2

Do

not

exceed

±20

volts

de.

Apply

only

de

voltages

with

rise

times

less

than

10

6

volts

per

second,

1-9. INSTRUMENTS COVERED BY

MANUAL

1-10. This

instrument

has

a

two-part

serial

number

(see Figure 1-3).

The

first

four

digits

and

the

letter

comprise

the

serial

number

prefix.

The

last five

digits form

the

sequential

suffix

that

is

unique

to

each

instrument.

SERIAL

PREFIX

Figure 1-3.

Instrument

Identification

The

contents

of

this

manual

apply

directly

to

instruments

having

the

same

serial

number

pre-

fix(es) as listed

under

SERIAL

NUMBERS

on

the

title

page.

1-11. An

instrument

manufactured

after

the

print-

ing

of

this

manual

may

have a serial prefix

that

is

·not

listed

on

the

title

page. This

unlisted

serial

prefix indicates

that

the

instrument

is

different

from

those

documented

in

this

manual.

The

manual. for this

instrument

is

supplied

with

a

yellow Manual Changes

supplement

that

contains

"change

information"

that

documents

the

differ-

ences.

1-2

Model8555A

1-12.

In

addition

to

change

information,

the

sup-

plement

may

contain

information

for

correcting

errors in

the

manual.

To

keep

this

manual

as

current

and

accurate as possible,

Hewlett-Packard

recommends

that

you

periodically

request

the

latest

Manual Changes

supplement.

The

supple-

ment

for

this manual is

keyed

to

this

manual's

print

date

and

part

number,

both

of

which

appear

on

the

title

page.

Complimentary

copies

of

the

supplement

are available

from

Hewlett-Packard.

1-13.

For

information

concerning

a serial

number

prefix

not

listed

on

the

title page

or

in

the

Manual

Changes

supplement,

contact

your

nearest

Hewlett-

Packard

office.

1-14. DESCRIPTION

1-15.

The

HP Model

8555A

Spectrum

Analyzer

RF

Section

is

shown

in Figure 1-1

with

the

Model

8552B

Spectrum

Analyzer

IF

Section

and

the

Model

141

T Display

Section.

Table

1-1, Specifica-

tions,

and

Table 1-2,

Supplemental

Performance

Characteristics, are for

the

8555A

RF

Section

when

used with

an

8552A!B

IF

Section

and a

140-series Display Section.

1-16.

The

8555A

plug-in

is

the

microwave

RF

Section

for

use

with

the

8552-series

IF

section

and

the

140-series display

section.

Together

they

comprise

a receiver

that

electronically

scans

an

input

signal

and

provides a visual display

in

the

frequency

domain.

Input

signal

amplitude

is

plotted

on

the

CRT

as a

function

of

frequency.

The

amplitude

(Y-axis)

of

the

CRT

is

calibrated

in

absolute

units

of

power

(dBm)

or

voltage

(pV/mV)

(50-ohm

system): accordingly,

absolute

and

rela-

tive

measurements

of

both

amplitude

and

fre-

quency

can

be

made.

1-17.

The

analyzer

RF

and

IF

sections

form

a

highly sensitive

super-heterodyne

receiver

with

spectrum-scanning capabilities over

the

frequency

range

of

10

MHz

to

40

GHz in

14

frequency

bands.

The

analyzer

presents a

calibrated

CRT

display

up

to

2 GHz wide. Absolute

calibration

accuracy

is

maintained

from

10

MHz

to

18.0

GHz

in

10

bands,

using

internal

mixing.

The

frequency

range

from

12.4

GHz

to

40

GHz is covered

in

4

bands

through

the

use

of

external

mixers.

1-18.

Instrument

controls

are arranged so

that

the

operator

can

identify,

type,

and

measure

signal

parameters

with

a

minimum

of

switching.

For

wide-spectrum

analysis,

the

operator

can

choose

a

preset

scan

width

covering

the

full

range

of

each

frequency

band.

For

a

more

detailed

study,

the

spectrum

width

can be progressively

narrowed

to

Modei8555A

as little as 2 kHz/div,

or

the

scanning capabilities

can

be

eliminated

altogether

to

use

the

instrument

as a fixed-tuned receiver. A

300kHz

IF

bandwidth

is automatically selected

for

full-scan operation;

for variable-scan and fixed

frequency

operation,

bandwidths

as narrow as

100Hz

can

be

selected. A

single switch will

automatically

enable

the

first LO

tuning

stabilization circuit

when

scan

widths

of

100

kHz

per

division,

or

less, are selected. A signal

identifier circuit,

controlled

by

an

on/off

switch,

allows

the

operator

to

quickly

determine

the

har-

monic mixing

mode

and

select

the

appropriate

frequency

band.

The signal identifier can be

enabled for

scan

widths

of

1 MHz

per

division

or

less.

1-19. OPTIONS

1-20.

Option

001.

Replaces

type

N

with

type

AP.C-7

connector.

1-21.

Option

002

for

the

Model

8555A

is a limiter

which can

be

installed

between

the

RF

Section's

INPUT

port

and

the

input

attenuator

to

protect

input

circuitry

from

being

overdriven. See

Appendix A

for

details regarding

Option

002.

1-22. ACCESSORIES SUPPLIED

1-23. The

RF

Section is

shipped

with

three

coaxial

type

terminations and

one

multi-section termina-

tion.

The coaxial

terminations

are installed

on

the

EXT

MIXER

port,

the

FIRST

LO OUTPUT

port

and

the

SECOND LO

OUTPUT

port.

(See Figure

3-1, items

17,

18,

and

19.)

The

multi-section

termination is shipped

taped

to

the

top

of

the

RF

Section. Install

the

multi-section

termination

on

the

Display Section rear panel. (See

item

3, Figure

3-3.)

The

coaxial

terminations

are HP

part

number

11593A

and

the

multi-section

termination

is

HP

part

number

08553-60122.

General

Information

1-24. EQUIPMENT REQUIRED BUT NOT

SUPPLIED

1-25.

The

8555A

Spectrum

Analyzer

RF

Section

must

be

mated

with

an 8552-series

Spectrum

Analyzer

IF

Section and

one

of

the

140-series

Display Sections

or

140-series Oscilloscope Main-

frames

before

the

units can

perform

their

function

as a

spectrum

analyzer.

The

140S/140T/143S

Dis-

play

Sections

are

equipped

with

a fixed-persis-

tence/non-storage

CRT, whereas

the

141S

and

141

T Display Sections are

equipped

with

a

variable-persistence storage CRT. Overlays,

to

provide

LOG and LINEAR graticule scales, are

available

for

use

with

the

standard

140A

and

141A

Oscilloscope Mainframe.

1-26.

Operating

accessories

for

use

with

the

8555/8552/140

Spectrum

Analyzer

are

listed

in

Table

1-3. Operating accessories

include

a wave-

guide

mixer,

adapters, filters

and

a

frequency

comb

generator.

An

external

waveguide

mixer

and

appropriate

adapters

are

required

over

the

fre-

quency

range

of

18

to

40

GHz.

1-27.

WARRANTY

1-28.

The

8555A

Spectrum

Analyzer

RF

Section

is

warranted

and certified

as

indicated

on

the

inner

front

cover

of

this manual.

For

further

information

contact

the

nearest Hewlett-Packard Sales

and

Service Office; addresses are provided

at

the

back

of

this

manual.

1-29. RECOMMENDED TEST EQUIPMENT

1-30. Tables 1-4

and

1-5 list

the

test

equipment

and

test

equipment

accessories

required

to

check,

adjust,

and

repair

the

8555A

Spectrum

Analyzer

RF

Section.

1-3

General

Information

Mode!8555A

Table 1-1.

8555A/8552A/8552B

Specifications

1-4

FREQUENCY SPECIFICATIONS

FREQUENCY RANGE

Tuning Range

With internal mixer: 0.01 -18.00 GHz.

With external mixer: 12.4 -

40

GHz.

Selectable continuous coarse (by means

of

push-

pull knob) and fine tuning determine display

center frequency.

Harmonic Mixing Mode

Signal Identification: Signal identifier separates

unknown input signal in center

of

CRT into

two images 2 divisions apart with image

on

left

slightly less in amplitude when the calibrated

frequency scale

is

advanced

to

the appropriate

band.

Scan Width

Full Scan: Inverted marker positioned

by

tuning

control identifies the frequency

that

becomes

the center frequency for scan width per divi-

sion and zero scan modes. The width

of

the

scan depends on mixing mode. Scan width = n

x 2000 MHz, where n is the mixing mode; e.g.,

for n = 2, scan width is 4 GHz.

Per Division: 16 calibrated scan widths from 2

kHz/div to 200 MHz/div in a 2, 5, 10

sequence.

Manual Scan: (Available with 8552B only.) Scan

determined by front panel control; continu-

ously variable across

CRT

in either direction.

Zero Scan: Analyzer becomes fixed tuned

re-

ceiver with frequency set

by

frequency and

fine tune controls and selectable bandwidths

by bandwidth control. Amplitude variations are

displayed versus time on CRT.

FREQUENCY ACCURACY

Dial

Accuracy: n x (±15 MHz) where n

is

the mix-

ing mode.

Scan Accuracy: Frequency

error

between two

points on

the

display is less than 10%

of

the indi-

cated separation.

Stability:

Total Analyzer Residual FM (Fundamental

Mixing)

Stabilized

<100Hz

peak-to-peak

Unstabilized

<10kHz

peak-to-peak

First

LO

residual FM typically 30 Hz.

Noise Sidebands: For fundamental mixing. More than

70 dB below

CW

signal, 50 kHz or more away from

signal, with 1 kHz

IF

bandwidth and

100Hz

video

filter.

RESOLUTION

Bandwidth Ranges: IF bandwidths

of

0.10

to

300

kHz provided in a 1, 3 sequence.

Bandwidth Accuracy: Individual IF bandwidth 3 dB

points calibrated

to

±20%. (10 kHz

bandwidth

±5%).

Bandwidth Selectivity:

60 dB/3 dB Bandwidth

Ratio

IF

Bandwidth 8552A 8552B

10

kHz -300 kHz

1kHz-

3kHz

0.1 kHz -0.3 kHz

20:1

25:1

20:1

11:1

AMPLITUDE SPECIFICATIONS

ABSOLUTE CALIBRATION RANGE

Measurement

Rang:e

,_[~~-~~ii:O"""""'i~~J

See

"Input

Specifications" for maximum

levels

to

INPUT .01 -18 GHz connector and

to

input

mixer.

Log Reference Level: From -130 dBm

to

+10

dBm, in 10 dB steps. Log reference level ver-

nier, 0 to -12 dB continuously.

Linear Sensitivity: From 0.1

11V/div

to

100

mV/div in a 1,2 sequence. Linear sensitivity

vernier 1

to

0.25 attenuation ratio continu-

ously.

Sensitivity

Average Noise Level: Specified for 1 kHz band-

width. Using lower bandwidths will improve

average noise level; e.g., use of 100 Hz band-

width will improve noise level

in

the 1.5

to

3.55 GHz frequency range from -117 dBm

to

-127 dBm max.

With INTERNAL Coaxial Mixer

Frequency Mixing

IF

Freq. Average

Range Mode (MHz) Noise Level

(GHz) (n) (dBm max.)

0.01-

2.05 1- 2050 -115

1.50 -3.55 1- 550 -117

2.07-

6.15

2-

2050 -108

2.60-

4.65 1+ 550 -117

4.11-

6.15 1+ 2050 -115

4.13

-

10.25

3- 2050 -103

6.17 -

10.25

2+

2050 -105

6.19 -

14.35

4- 2050 -

95

8.23 -

14.35

3+ 2050 -100

10.29 -

18.00

4+ 2050 -

90

With

11517

A EXTERNAL Waveguide Mixer and

Appropriate Waveguide Tapers

Frequency Range Average Noise Level (Typ.)

12.4 -18.0 GHz

-90

dBm

18.0 -26.5 GHz

-85

dBm

26.5 40.0 GHz

-75

dBm

Model8555A

General

Information

Table 1-1.

8555A/8552A/8552B

Specifications

(Continued)

Residual Responses: Referred

to

signal level

at

input

mixer

on

fundamental mixi·ng:

<-90

dBm.

Display Range

Log: 70 dB, 10 dB/div with 8552B 2 dB/div log

expand on a 16 dB.display.

Linear: From 0.1 mV

to

100 mV/div in a 1, 2

sequence on an 8-division display.

Display Uncalibrated Light: Panel light warns

operator

of

uncalibrated

amplitude

display if the

IF

or

video bandwidth selected is

too

narrow for

combination of scan width

and

scan time

se-

lected.

Input Attenuator Range:

0-

50 dB in

10

dB steps.

ABSOLUTE CALIBRATION ACCURACY

'I'he overall absolute calibration accuracy

of

the

spectrum analyzer

in

a particular application

is

a

function of the measurement technique. The follow-

ing

elements also affect absolute calibration accuracy:

Frequency Response: With 10 dB

input

attenuator

setting.

Frequency Mixing

IF

Freq. Frequency

Range Mode Response

(GHz) (n) (MHz) (dB

max.)

0.01-

2.05

1-

2050 ±1.0

1.50 -3.55

1-

550 ±1.0

2.07-

6.15

2-

2050 ±1.25

2.60-

4.65

1+

550 ±1.0

4.11-

6.15

1+

2050 ±1.0

4.13-

10.25

3-

2050 ±1.5

6.17.

10.25

2+

2050 ±1.5

6.19-

14.35

4-

2050 ±2.0

8.23-

14.35

3+

2050 ±2.0

10.29 -18.00

4+

2050 ±2.0

IF

gain variation with different bandwidth settings:

(at 20°C).

Log: ±0.5 dB.

Linear: ± 5.8%.

Amplitude Display: Log ±0.25 dB/dB

but

not

more

than ±1.5

dB

over the full 70 dB display range.

Linear: ±2.8% of full 8-division deflection.

Input

RF

Attenuator: Frequency response typically

±0.6 dB from 10

MHz

to 18 GHz.

Log

Reference Level: Accurate to ±0.2

dB

(±2.3%

Linear Sensitivity).

Log

Reference

Level

Vernier: Accurate to ±0.1 dB

(1.2%) in 0, -6, and

-12

dB positions; otherwise,

±0.25 dB (±2.8%).

Calibrator Output: Amplitude

·30

dBm, ±0.3 dB.

Frequency 30

MHz,

±0.3 MHz (8552A),±3 kHz

(85528).

INPUT SPECIFICATIONS

Input Impedance: 50!2 nominal

(0.01-

18 GHz).

Reflection Coefficiertt:<0.130 (1.30 SWR) for input

RF

attenuator

settings

~10

dB.

Maximum

Input

Level:

(-~~:0~~

DO

NOT EXCEED THE FOLLOWING

MAXIMUM

INPUT LEVELS:

Max-

imum

Input

Levels

dBm

Watts

DC

Rms

Peak

Input

0.01

-

18

GHz

+33

2

±20

10

14.14

Con

nee-

tor

Incident

1.0

on

+10

Input

10mW

±20

0.707

Mixer

1

The

INPUT

ATTENUATION

control

must

be

in

the

30

dB

or

greater

position

when

applying

+33

dBm

or

input

mixer

will

be

damaged.

The

power

levels

listed

apply

for

peak

or

average

power,

2

Do

not

exceed

±

20

volts

de.

Apply

only

de

voltages

with

rise

times

less

than

106

volts

per

second.

Do

not

change

INPUT

ATTENUATION

levels

when

devol-

tages

are

applied

to

RF'

INPUT

Connector.

RF Input Connector: Type N female.

External Mixer

Input

Connector:

BNC

female;

LO

power transfer to external mixer through connec-

tor

as

well

as

2.05 GHz

IF

signal return to

spectrum analyzer.

LO

power typically 0 dBm.

SCAN TIME SPECIFICATIONS

Scan Time: 16 internal scan rates from 0.1 ms/div to

10

sec/div

in

a

1,

2, 5 sequence.

Scan Time Accuracy: 0.1 ms/div to

20

ms/div, ±10%,

50

ms/div

to

10 sec/div, ±20%.

GENERAL

SPECIFICATIONS

Power Requirements: 115 or 230 volts±10%, 50 ·

60

Hz, normally less than 225 watts (varies with

plug-in units used).

Dimensions: Model

140T

or 141T Display Section,

9-1/16 in. H (incl. feet) x 16-3/4 in. Wx 18-3/8 in.

D (229 x 425 x 467 mm). Model 1438 Display

Section, 21 in. H (incl.feet) x 16-3/4 in. W x

18-3/8 in. D (533 x 425 x 467 mm).

Weight:

Model

8555A

RF

Section:

Net

14lb

15 oz (6,8 kg).

Model

8552A

IF

Section: Net

9lb

(4,1 kg).

Model 8552B

IF

Section: Net

9Ib

(4,1 kg).

Model

140T

Display Section: Net

37lb

(16,8 kg).

Model141T

Display Section: Net 40 lb (18 kg).

Model 143S Display Section: Net

62lb

(28,1 kg).

1-5

General

Information

Model8555A

Table 1-2. Supplemental Performance Characteristics

SUPPLEMENTAL PERFORMANCE CHARACTERISTICS

~

AMPLITUDE CHARACTERISTICS

For typical sensitivity and frequency response versus

input frequency, see Figure 1-4.

Spurious Responses Due to Second

Harmonic

Dis-

tortion: With -40 dBm incident on input mixer.

Frequency

Range

0.1 6.2

GHz

6.2 · 10.3

GHz

10.3 · 14.4

GHz

14.4 . 18.5

GHz

2nd

Harmonic

Distortion

<-63

dB

<-69

dB

<-54

dB

<-51

dB

Spurious Responses Due to

Third

Order

Inter-

modulation Distortion: <-70 dB with -30 dBm

incident

on

input

mixer

and

signal separation

>1

MHz.

Video Filter:

Post~detection

filter used to

average

displayed noise.

With

8552A nominal band-

widths: 10 kHz and 100 Hz. With 8552B nominal

bandwidths: 10 kHz, 100 Hz, and 10

Hz.

Gain

Compression:

For

internal mixer

gain

compres-

sion

<1

dB

for

-10

dBm peak

or

average signal

level to input mixer. 11517A external mixer

(12.4 . 40 GHz) gain compression,

<1

dB

for

-15

dBm

peak or

average

signal

level to input mixer.

FREQUENCY CHARACTERISTICS

RESOLUTION

See Figure 1-5 for curves of typical 8555A/8552A

and 8555A/8552A spectrum analyzer resolution for

different bandwidths.

·20

JL\

1

:IIjll_

IJffillil

1/1//11

1

1111

J/1

\1

t!ypical Frequency Response j I I I If II

1/

1111

I ·

1111l±1

dB

±l;

~~=-_JL+25ds

1

-40

-60

w -80

0

II

I ll1

~

.

'II

I

'1

i

J.l

\I

ill

.lllif·

,I

t+

j

10kHz

BW

I

II

, r

~~~

I,

"

~

-100

~

:'i

1-6

I

lll111111kH•BW

Ill

I

1111

Ill

1111nfJJ/

I

l1llllllo.1

kH•

swill

I

11111111

I

Ill

~Ill

. I IIIIII[

IIIIIIIIUII\11111

I

LlJl

·120

·140

1 MHz

10

MHz

100 MHz 1 GHz 10

GHz

FREQUENCY

Figure 1-4. Typical

Spectrum

Analyzer

Sensitivity and Frequency Response

i

100

GHz

FREQUENCY DRIFT

Long Term Drift: (At fixed center frequency, after

2-hour warm-up).

Stabilized: ±3.0 kHz/10 min.

Unstabilized: ±25 kHz/10 min.

Stabilization Range: First

LO

can be automatically

stabilized

to

internal crystal reference for scan

widths of

100

kHz/div or less.

OUTPUT CHARACTERISTICS

First

LO

Output: +10 dBm; 50 ohms; 2.05 · 4.10

GHz.

Second

LO

Output: +10 dBm; 50 ohms; 1500

MHz.

Third

LO

Output:

+5

dBm; 50 ohms (rear panel);

500

MHz.

Pen Lift Output: 0 to 14 volts

(0

volts during scan

cycle). Output available

in

lnt

and single scan

modes and

Auto,

Line, and Video scan trigger.

Vertical Output: 100 mV per major division on

CRT

display;

output

impedance

<100

ohms.

SCAN CHARACTERISTICS

Scan

Mode:

Int: Analyzer repetitively scanned by internally

generated

ramp;

synchronization selected by

scan trigger.

FREQUENCY

Figure 1-5. Typical Spectrum

Analyzer

Resolution

(Fundamental Mixing)

HP 8555A Service manual

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