MFJ MFJ-802B Bedienungsanleitung

ME)

Field

Strength

Meter

Model

MFJ-802B

INSTRUCTION

MANUAL

CAUTION:

Read

All

Instructions

Before

Operating

Equipment

MFJ

ENTERPRISES,

INC.

300

Industrial

Park

Road

Starkville,

39759

USA

Tel:

662-323-5869

Fax:

662-323-6551

1099

MFJ

ENTERPRISES,

INC.

MFJ-802B

Instruction

Manual

INTRODUCTION

Thank

you

for

purchasing

the

MFJ-802B.

field-strength

meter

(or

FSM)

one

the

most

practical

pieces

ham

test

equipment

you

can

own,

and

the

MFJ-802B

has

some

special

features

think

you'll

like,

For

example,

has

huge

high-resolution

meter

with

robust

100

scale

that's

easy

read

from

several

feet

away.

also

combines

balanced

pick-up

antenna

with

RF-insulated

enclosure

eliminate

hand-capacitance

errors

typical

older-style

meters.

There's

high-Z

balanced

decoupling

network

that

ensures

top

efficiency

over

wide

frequency

range

and

provides

complete

isolation

between

the

detector

and

metering

circuits.

And,

there's.a

uA-type

meter

movement

with

wide-range

sensitivity

control

handle

signals

from

the

milliwatt

kilowatt

level.

Add

the

MFJ-802R

remote

pickup,

and

you

can

monitor

field

strength

from

anywhere

you

wish

the

comfort

your

shack.

Inexpensive

low-voltage

wire

connect

the

two

units

together.

most

field-strength

meters,

the

MFJ-802B

extremely

simple

operate.

However,

with

any

piece

test

equipment,

has

limitations

you

should

know

about--and

urge

you

read

the

manual

carefully

before

using

it.

YOUR

METER'S

CONTROLS

Remote

Sensitivity

O-5

MFJ-802

FSM

Collapsible

Dipole:

Balanced

pickup

element

extend

38"

(1/2-

wave

2-meters).

Adjust

for

resonance

VHF/UHF

frequencies,

extend

fully

and

use

non-resonant

dipole

HF.

The

antenna

RF-decoupled

from

metering

circuitry,

and

dipole

pattern

will

maintained

non-resonant

frequencies.

EEUU

NEES

EIEIEIISEIEIEEEE

MF/J-802B

Instruction

Manual

Easy-to-Read

Meter

Scale:

Bold

0-100

scale

readable

for

several

feet--may

set

any

convenient

location

near

your

operating

site.

High-quality

meter

movement

resolves

even

small

changes

the

field.

Remote

Detector

Jack:

Standard

phone

jack

accepts

monaural

1/4"

plug

when

MFJ-802R

remote

detector

used.

Wide-Range

Sensitivity

Control:

Adjusts

your

meter

for

wide

range

power

levels

and

distances

the

source.

prevent

damage,

always

begin

measurements

with

the

sensitivity

control

set

minimum

(fully

counter

clockwise).

USING

YOUR

METER

The

MFJ-802B

useful

anywhere

hand-held

stationary

field-

strength

meter

needed.

For

example,

it's

perfect

for

resonating

critical

mobile

antennas,

adjusting

tuning

networks,

optimizing

antenna

arrays

for

highest

ERP,

and

tuning

transmitter

circuitry

for

maximum

output.

Remember

exercise

caution

when

working

near

guises

antennas.

and

permanent

injury.

Here

are

some

specific

tips

help

you

get

the

most

from

your

meter:

avoid

violently

pinning

the

meter,

always

begin

field-strength

measurements

with

the

sensitivity

control

turned

fully

down

(or

counter-clockwise).

Also,

it's

good

practice

store

your

meter

with

the

sensitivity

set

minimum.

For

best

meter

resolution,

set

the

meter's

sensitivity

control

yield

mid-range

readings.

Orient

the

meter's

pick-up

dipole

the

same

polarization

your

antenna

under

test.

VHF/UHF

frequencies,

maintain

minimum

2-3

wavelengths

spacing

between

the

pick-up

antenna

and

any

antenna

under

test.

Closer

proximity

could

easily

damage

the

meter's

diode

detector,

and

may

detune

the

test

antenna

you're

attempting

adjust.

MFJ-802B

Instruction

Manual

Try

keep

test

antennas--and

your

meter's

pick-up

antenna--well

separated

from

nearby

cables,

masts,

other

metallic

structures

that

could

act

parasitic

element

and

effect

your

results.

may

result:

REMOTE

PICKUP

(MFJ-802R)

The

MFJ-802R

optional

antenna/detector

unit

that

identical

your

MFJ-802B--minus

the

meter

and

sensitivity

control.

The

MFJ-

802R

can

plugged

into

your

primary

meter

and

located

remotely

provide

optimum

monitoring

positioning.

For

example,

obtain

station

antenna

measurements

uncolored

household

wiring

and

leakage,

install

the

MFJ-802R

remote

outside

the

building

and

connect

your

MFJ-802B

the

ham

shack.

Or,

for

accurate-

antenna

range

measurements,

install

the

MFJ-802R

remote

several

wavelengths

down-range

and

locate

the

MFJ-802B

meter

your

antenna

test

site.

The

MFJ-802B

meter

and

remote

pickup

require

only

low-cost

2-conductor

wire

for

interconnection.

The

remote

pickup

great

way

increase

the

versatility

and

usefulness

your

MFJ-802B.

THEORY

OPERATION

The

MFJ-802B

Field-Strength

Meter

uses

dipole

sense

antenna

with

diode

bridge

connected

across

its

feedpoint.

The

diode

bridge

passes

dc-detector

voltage

sensitivity

control

R1,

while

blocking

and

isolating

the

antenna

from

common-mode

pickup.

adjustable

voltage

divider

that

controls

the

detector

output

level

applied

meter

Ml. The

remote

detector

identical

the

MFJ-802B,

minus

the

sensitivity

contro]

and

meter.

ead

EEE

aaa

MFJ-802B

Instruction

Manual

CASE

DIFFICULTY

Your

meter

has

internal

adjustments

and

represents

trouble-free

design.

However,

has

sensitive

electro-mechanical

meter

that

may

sustain

damage

dropped.

Also,

the

MFJ-802B

not

weatherproof,

and

should

not

exposed

heavy

rain,

snow,

other

harsh

environmental

conditions

TECHNICAL

ASSISTANCE

you

have

any

problem

with

this

unit

first

check

the

appropriate

section

this

manual.

the

manual

does

not

reference

your

problem

your

problem

not

solved

reading

the

manual

you

may

call

MFI

Technical

Service

662-323-0549

the

MFJ

Factory

662-323-

5869,

You

will

best

helped

you

have your

unit,

manual

and

all

information

your

station

handy

you

can

answer

any

questions

the

technicians

may

ask.

You

can

also

send

questions

mail

MFJ

Enterprises,

Inc.,

300

Industrial

Park

Road,

Starkville,

39759;

Fax

662-323-6551,

[email protected].

Send

complete

description

your

problem,

explanation

exactly

how

you

are

using

your

unit,

and

complete

description

your

station.

MEFJ-802B

Instruction

Manual

SCHEMATIC

UNLESS

OTHERMISE

SPECIFIED

;

FIELD

STRENGTH

METER

LIMITED

MONTH

WARRANTY

Enterprises,

Inc.

warrants

the original

owner

this

product,

manufactured

MF]

Enterprises,

Inc.

and

purchased

from

authorized

dealer

directly

from

MFJ

Enterprises,

Inc.

free

from

defects

material

and

workmanship

for

period

months

from

date

purchase

provided

the

following

terms

this

warranty

are

satisfied:

10.

The

purchaser

must

retain

the

dated

proof-of-purchase

(bill

sale,

canceled

check,

credit

card

money

order

receipt,

etc.)

describing

the

product

establish

the

validity

the

warranty

claim

and

submit

the

original

machine

reproduction

such

proof

purchase

MFJ

Enterprises,

Inc.

the

time

warranty

service.

MFJ

Enterprises,

Inc.

shall

have

the

discretion

deny

warranty

without

dated

proof-of-purchase.

Any

evidence

alteration,

erasure,

forgery

shal]

cause

void

any

and

all

warranty

terms

immediately.

MFYJ

Enterprises,

Inc.

agrees

repair

replace

MFJ's

option

without

charge

the

original

owner

any

defective

product

under

warrantee

provided

the

product

returned

postage

prepaid

MFJ

Enterprises,

Inc.

with

personal

check,

cashiers

check,

money

order

for

$7.00

covering

postage

and

handling.

This

warranty

NOT

void

for

owners

who

attempt

repair

defective

units.

Technical

consultation

available

calling

Service

Department

662-323-0549

the

MFJ

Factory

662-323-5869.

This

warranty

does

not

apply

kits

sold

manufactured

MFJ

Enterprises,

Inc.

Wired

and

tested

board

products

are

covered

this

warranty

provided

only

the

wired

and

tested

board

product

retumed.

Wired

and

tested

boards

installed

the

owner's

cabinet

connected

switches,

jacks,

cables,

etc.

sent

MFJ

Enterprises,

Inc.

will

retuned

the

owner's

expense

unrepaired.

Under

circumstances

MFJ

Enterprises,

Inc.

liable

for

consequential

damages

person

property

the

use

any

MFJ

products.

Out-of-Warranty

Service:

MFJ

Enterprises,

Inc.

will

repair

any

out-of-warranty

product

provided

the

unit

shipped

prepaid.

All

repaired

units

will

shipped

COD

the

owner.

Repair

charges

will

added

the

COD

fee

unless

other

arrangements

are

made.

This

warranty

given

lieu

any

other

warranty

expressed

implied.

MF]

Enterprises,

Inc.

reserves

the

right

make

changes

improvements

design

manufacture

without

incurring

any

obligation

install

such

changes

upon

any

the

products

previously

manufactured.

All

MFJ

products

serviced

in-warranty

out-of-warranty

should

addressed

to:

MEJ

Enterprises,

Inc.

300

Industrial

Park

Road

Starkville,

Mississippi

39759

USA

and

must

accompanied

letter

describing

the

problem

detail

along

with

copy

your

dated

proof-of-purchase.

This

warranty

gives

you

specific

rights,

and

you

may

also

have

other

rights

which

vary

from

state

state.

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