Yaesu FV-901DM Manuale utente

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INSTRUCTION

MANUAL

FV-901DM

|

ae

YAESU

MUSEN

CO.,

LTD.

TOKYO

JAPAN

SYNTHESIZED

SCANNING

VFO

FV-901DM

GENERAL

DESCRIPTION

The

FV-901DM

external

VFO

for

the

FT-901

se:

of

transceivers

provides

a

new

dimen-

sion

in

operating

versatility.

Featuring

PLL

synthesis

in

100

Hz

steps,

the

FV-901DM

may

be

tuned

by

means

of

the

main

dial,

or

via

manual

or

automatic

scanning

controls.

As

well,

the

operator

may

select

from

as

many

as

40

positions

of

frequency

memory,

programmed

by

a

front

panel

pushbutton.

A

memory

backup

feature

allows

the

memorized

frequencies

to

be

held

even

though

the

VFO

and

transceiver

are

turned

off.

Frequency

control

may

be

exercised

in

a

variety

of

combinations,

using

the

FT-901DM

main

dial,

the

FT-901DM

memory

circuitry,

the

FV-901DM

main

dial,

and

the

FV-901DM

memory

bank.

Any

of

these

components

may

be

selected

to

provide

control

of

the

trans-

mit,

receive,

or

transceive

frequency.

A

clarifier

control

on

the

front

panel

of

the

FV-

901DM

allows

precise

tuning

between

the

100

Hz

synthesizer

steps,

or

to

follow

a

drift-

ing

signal

stored

in

memory.

The

following

pages

will

describe

in

detail

the

operation

of

the

FV-901DM

synthesized

scanning

VFO.

As

this

apparatus

is

significantly

advanced

over

other

VFO’s

on

the

market,

the

operator

is

urged

to

read

this

manual

thoroughly

before

attempting

operation.

Frequency

range

Output

level

Stability

(+

25°C)

Memory

channels

Clarifier

Power

requirements

:

Power

consumption

:

Case

size

Weight

1)

AC

Power

Cord

2)

Connection

Cable

3)

Ground

Cable

4)

Fuse

(0.5

A)

:

40

SPECIFICATIONS

5.55—4.95

MHz

150

mV

RMS

into

50

ohms

+

300

Hz

in

first

hour

after

|

minute

warm-up

+

50

Hz

after

|

hour

+

|

kHz

over

temperature

range

—10°C

—

+60°C

+2.5

kHz

offset

of

transmit,

receive,

or

transceive

frequencies,

on

dial

or

memory

mode

100/110/117/200/220/234

volts

AC,

50/60

Hz

13.5

volts

DC,

negative

ground

(use

only

optional

DC

cable)

AC

—

13

VA

(5.4

VA

memory

backup

mode)

DC

—

0.53

amps

(0.12

amps

memory

backup

mode)

210(W)

x

154(H)

x

320(D)

mm

Approx.

4

kg.

ACCESSORIES

PIN

No

1

VFO

OUT-

2

GND—

3

EXT

OVIN

4

AGC

IN

STKI2VIN

ce

|

CONTROLS

AND

SWITCHES

(1)

MEMORY

CHANNEL

The

MEMORY

CHANNEL

selector

switch

chooses

up

to

40

frequencies

stored

by

the

M_

button.

These

frequencies

can

be

used

for

control

of

the

transmit.

receive,

or

transceive

frequency,

as

described

in

the

“Operation”

section.

(2)

POWER

This

is

the

main

power

switch

for

the

VFO.

(3)

MA

JAL

SCAN

switches

These

switches

select

the

scanning

rate

for

the

PLL

seanner.

When

activated,

they

will

select

slow,

medium,

or

fast

scanning

rate.

depending

on

the

desires

of

the

operator.

(4)

AUTO

SCAN

The

automatic

scanner

will,

when

activated.

scan

at

the

medium

speed

until

a

signal

is

received.

then

stop.

This

feature

is

very

useful

for

checking

a

band

for

activity.

(5)

TUNING

DIAL

This

is

the

main

manual

tuning

dial

for

the

FV-

9YOIDM.

When

control

is

said

to

be

by

the

“FV-

901IDM

VFO."

it)

should

be

understood

that

control

is

by

the

PV-90LDM

main

tuning

dial.

(6)

SELECT

switches

These

switches

determine

the

operating

mode

of

the

FV-901DM.

Q

ao

a

MR

is

used

for

recall

of

a

memorized

fre-

quency

for

control

of

the

tranceive

fre-

quency.

TX

MR

is

used

for

recall

of

a

memorized

frequency

for

control

of

the

transmit.

fre-

quency,

with

receive

frequency

control

being

on

the

main

tuning

dial

RX

MR

is

used

for

recall

of

a

memorized

frequency

for

control

of

the

receive

fre-

quency.

with

transmit)

frequency

control

being

on

the

main

tuning

dial.

VEO

selects

operation

via

the

main

tuning

dial

or

the

scanning

functions

for

control

of

the

transeeive

frequency

LOCK

is

used

in

conjunction

with

the

main

tuning

dial,

With

the

VFO

button:

pressed,

pressing

the

LOCK

button

will

cause

the

VFO

frequency

to

be

locked.

regardless

of

the

setting

of

the

dial

A

second

press

of

the

LOCK

button

returns

control

to.

the

main

tuning

dial.

M

is

a

momentary

switch

for

inserting

a

frequency

into

one

of

the

40

memory

po-

sitions.

(7)

ANALOG

READOUT

The

main

tuning

dial

uses

an

analog

frequency

display.

The

major

calibration

markings

represent

CONTROLS

AND

SWITCHES

(1)

MEMORY

CHANNEL

The

MEMORY

CHANNEL

selector

switch

chooses

up

to

40

frequencies

stored

by

the

M

button.

These

frequencies

can

be

used

for

control

of

the

as

transmit,

receive,

transceive

described

in

the

“Operation”

section.

or

frequency.

(2)

POWER

This

is

the

main

power

switch

for

the

VFO.

(3)

MANUAL

SCAN

switches

These

PLI

slow.

switches

select

the

scanning

rate

for the

When

they

will

fast

scanning

rate,

depending

scanner,

activated,

select

medium,

or

on

the

desires

of

the

operator.

(4)

AUTO

SCAN

The

automatic

scanner

will,

when

activated,

scan

at

the

medium

speed

until

a

signal

is

received.

then

stop.

This

feature

is

very

useful

for

checking

a

band

for

activity.

(5)

TUNING

DIAL

This

is

the

main

manual

tuning

dial

for

the

PV-

901DM.

When

control

is

said

to

be

by

the

“FY-

901DM

VFO.

it)

should

that

control

is

by

the

FV-901DM

main

tuning

dial.

be

understood

(6)

SELECT

switches

These

switches

determine

the

operating

mode

of

the

FV-901DM.

@

do

Ww

MR

is

used

for

recall

of

a

memorized

fre-

quency

for

control

of

the

tranceive

fre-

quency.

TX

MR

is

used

for

recall

of

a

memorized

frequency

for

control

of

the

transmit

fre-

quency,

with

receive

frequency

control

being

on

the

main

tuning

dial.

RX

MR

is

used

for

recall

of

a

memorized

frequency

for

control

of

the

reecive

queney,

with

frequency

being

on

the

main

tuning

dial.

tre-

transmit

control

VFO

selects

operation

via

the

main

tuning

dial

or

the

scanning

functions

for

control

of

the

transceive

frequency.

LOCK

is

used

in

conjunction

with

the

main

tuning

dial.

With

the

VFO

button

pressed.

the

LOCK

button

the

VFO

frequency

to

be

locked,

regardless

of

the

setting

of

the

dial,

A

second

press:

of

the

LOCK

the

main

tuning

dial.

pressing

will

cause

button

returns

control

to

M

is

a

momentary

switch

for

inserting

a

frequency

into

one

of

the

40

memory

po-

sitions.

(7)

ANALOG

READOUT

The

main

tuning

dial

uses

an

analog

frequency

display,

The

major

calibration

markings

represent

INSTALLATION

The

FV-90IDM

may

be

situated

almost

any-

where

in

the

operating

room,

depending

on

the

operator's

preferences.

However,

excessively

warm

locations,

such

as

on

top

of

an

amplifier,

should

be

avoided,

if

only

to

allow

proper

air

circulation

for

the

other

equipment.

Ort

©

100/110

120

©

100]110

120

Connect

the

ground

cable

supplied

with

the

PV-

901DM_

to

the

GND

terminals

of

the

FV-901DM

and

the

FT-901.

Connect

the

interconnection

cable

from

the

EXT

VFO

jack

on

the

FT-901

to

the

FV-901DM

OUTPUT

connector.

BEFORE

CONNECTING

THE

POWER

CORD

TO

THE

REAR

APRON

POWER

CONNECTOR,

MAKE

SURE

THAT

THE

VOLTAGE

SPECIFI-

CATION

MARKED

ON

THE

REAR

APRON

MATCHES

YOUR

LOCAL

SUPPLY

VOLTAGE.

REFER

TO

THE

DRAWING

FOR

THE

APPRO-

PRIATE

>

TRANSFORMER

CONNECTIONS

WHEN

CHANGING

SUPPLY

VOLTAGES.

WAR-

RANTY

DOES

NOT

COVER

DAMAGE

CAUSED

BY

IMPROPER

APPLICATION

OF

SUPPLY

VOLTAGE.

Connect

the

power

cable

to

the

rear

apron

POW-

ER

connector.

Place

the

FV-901DM

POWER

switch

in

the

ON

position,

and

the

VFO

is

now

ready

for

operation.

Transformer

Primary

Wiring

Note:

When

using

the

optional

DC

cable,

please

note

that

the

2

amp

fuse

is

located

in

the

cable

itself.

Do

not

replace

the

AC

fuse

on

the

rear

apron

of

the

FV-901DM

with

a

2

amp

fuse.

OPERATION

FOR THE

PURPOSES

OF

THIS

AND

FOLLOW-

ING

SECTIONS,

THE

READER

IS

ADVISED

THAT

THE

TERM

“FT-901"

SHALL

APPLY

TO

ANY

AND

ALL

VERSIONS

OF

THE

FT-90]

SERIES:

FT-901DM/DE/SD/D.

THE

MEMORY

UNIT

IS

BUILT

INTO

THE

-901DM,

AND

IS

OPTIONAL

ON

THE

OTHER

MODELS,

THE

READER

IS

REFERRED

TO

THE

FT-901

SERIES

INSTRUCTION

MANUAL

FOR

FUR-

THER

CLARIFICATION

OF

THE

DIFFER-

ENCES

BETWEEN

THESE

MODELS.

SIMI-

LARLY,

THE

FYV-901IDM

SHALL

HEREAFTER

BE

REFERRED

TO

AS

“FV-901."

THESE

TERMS

ARE

ADOPTED

IN

THE

INTEREST

OF

BREVITY.

The

operation

of

the

FV-901

in

conjunction

with

the

FT-901

adds

several

levels

of

operating

flexi-

bility

never

before

possible

with

a

transceiver/

VFO

combination.

This

added

flexibility,

how-

ever,

contributes

somewhat

to

the

complexity

of

the

operating

procedure.

Until

familiarity

is

gained

with

the

various

operating

modes

possible

with

the

FV-901,

the

operator

is

urged

to

refer

to

this

manual

for

operating

instructions.

A

quick

reference

card

is

furnished

for

your

convenience.

SCANNER

OPERATION

The

three

MANUAL

SCAN

switches

allow

tuning

of

the

FV-901

at

one

of

three

rates.

In

the

SLOW

mode,

the

tuning

rate

is

|

kHz

per

second.

In

the

MED

(medium)

mode,

the

rate

is

17

kHz

per

second,

and

in

the

FAST

mode,

the

rate

is

100

kHz

per

second.

With

the

FV-901

VFO

or

TX

MR

switch

pressed,

RX

control

is

normally

via

the

main

tuning

dial.

Holding

the

manual

scanning

switches

UP

will

cause

the

frequency

to

scan

upwards

until

the

switch

is

returned

to

the

horizontal

position.

Likewise,

holding

the

switches

DOWN

will

cause

the

scanner

to

move

the

frequency

lower.

The

AUTO

SCAN

switch,

when

activated,

will

sean

in

the

selected

direction

until

a

signal

is

heard,

at

which

time

it

will

stop

and

lock

on

that

frequency.

Another

press

of

the

AUTO

SCAN

button

will

cause

the

VFO

to

scan

again,

until

another

signal

is

heard.

The

scan

rate

in

the

AUTO

SCAN

mode

is

the

same

as

in

the

MED

mode,

that

is,

17

kHz

per

second.

CLARIFIER

OPERATION

The

clarifier

in

the

FV-901

serves

two

useful

purposes.

First,

it

allows

very

fine

tuning

between

the

100

Hz

synthesizer

steps.

Secondly,

it

allows

tracking

of

a

memorized

frequency,

should

the

signal

being

received

begin

to

drift.

To

activate

the

receive

cla

push

the

RX

button.

To

activate

the

TX

clarifier,

push

the

TX

button.

For

transceive

clarifier

operation,

push

both

clarifier

buttons,

When

either

of

the

clarifier

buttons

is

pushed,

the

small

light

emitting

diode

will

become

illumi-

nated

to

indicate

that

the

clarifier

is

in

operation.

FY-901

OPERATION

WITH

THE

FT-901

For

the

sake

of

clarity

and

brevity,

the

FV-901

SELECT

buttons

to

be

pressed

will

be

circled,

and

the

FT-901

CT

buttons

to

be

pushed

will

not

be

circled.

Thus,

when

a

sentence

reads,

“Press

EXT,

MR,

and

PX

MR),”

the

reader

should

press

EXT

and

MR

on

the

FT-901,

and

TX

MR

on

the

FV-901.

A

useful

method

of

confirming

the

transmit

fre-

quency

while

learning

to

use

the

FV-901

is

as

follows:

place

the

FT-901

MIC

GAIN

and

CARR

controls

fully

counter-clockwise,

and

place

the

HEATER

switch

in

the

OFF

position.

Then,

by

placing

the

VOX

GAIN

control

in

the

MOX

po-

sition

(or

otherwise

activating

the

PTT

circuitry),

the

transmit

frequency

may

be

observed

for

reference.

This

particularly

valuable

when

observing operation

in

the

split

mode

(TX

and

RX

frequency

control

separate).

is

I.

REVIEW

OF

FT-901

MEMORY

OPERATION

In

order

to

explain

the

operation

of

the

FV-901,

a

review

of

the

operating

procedure

of

the

FT-901

memory

feature

is

necessary.

Depressing

the

M

button

allows

storage

of

a

frequency

in

memory.

After

storage

of

a

frequency

in

memory.

the

pressing

of

the

MR

button

will

recall

this

frequency

for

control

of

the

FT-901

transceive

frequency.

In

like

fashion,

pushing

the

TX

MR

button

recall

the

memorized

frequency

for

of

the

transmit

frequency,

with

receive

control

being

on

the

main

dial

will

control

Pushing

the

RX

MR

button

will

recall

the

memorized

frequency

for

control

of

the

frequency,

with

transmit

control

being

on

the

main

tuning

dial.

receive

Pushing

the

EXT

button

transfers

frequency

control

to

the

FV-901

on

tranceive,

receive.

or

transmit

when

the

MR.

RX

MR.

or

TX

MR

buttons,

respectively,

are

also

pushed.

Il.

TRANSCEIVE

OPERATION

USING

THE

FV-901

(Figs.

1

and

2)

Refer

to

the

insert,

“FV-901

Operation

Decision

Tree.”

Taking

the

“Transceive”

branth,

we

can

see

that

transceive

operation

may

be

controlled

from

either

the

FT-901

or

the

FV-901.

From

the

previous

section,

in

which

we

reviewed

FT-901

operation,

we

further

know

that

FT-901

trans-

be

via

either

the

FT-901

VFO

appropriate

positions

of

the

are

the

bottom

of

ceive

control

may

or

memory.

The

SELECT

switches

the

decision

tree.

shown

at

In

order

to

transfer

control

from

the

FT-901

to

the

FV-901,

the

EXT

button

is

pressed.

Then,

the

FT-901

SELECT

switches

dealing

with

mem-

ory.

ie.

MR,

TX

MR,

and

RX

MR,

shift

control

from

the

FT-901

to

the

FV-901

on

transceive,

transmit,

and

receive,

respectively.

Pressing

EXT

and

VFO

does

not

transfer

control

from

the

FT-901

to

the

FV-901.

To

transceive

on

the

FV-901,

press

EXT

and

MR;

control

is

now

by

the

FV-901.

Now

the

decision

must

be

made

as

to

whether

the

FV-901

VFO

or

memory

bank

will

control

the

frequency.

To

start,

pres:

Now

the

main

tuning

dial

on

the

FV-90]

ontrolling

the

transceive

frequency.

As

well,

the

scanners

are

operable:

refer

to

page

6

for

instructions

on

scanner

operation.

In

order

to

store

a

frequency

in

memory.

MEMORY

CHANNEL

to

position

tune

the

dial

to

the

desired

frequency,

and

press

(™).To

recall

this

frequency

for

transceive

control,

press(@MR).

Other

frequencies

may

be

memorized

by

pushing(VFO).

tuning

in

the

desired

station,

placing

the

MEMORY

CHANNEL

selector

in

positions

2-20,

pressing(M),

and

pressing

(MR)

for

recall.

switch

Before

proceeding

to

the

next

case,

the

logical

sequence

should

be

reviewed.

Having

made

the

to

operate

transceive,

decided

to

operate

with

the

FV-901

in

control.

Having

de-

cided

that

the

FV-901

was

to

control

the

f

quency,

we

decided

between

the

VFO

and

the

memory

bank.

The

appropriate

positions

of

the

SELEC

the

bottom

of

the

decision

tree.

decision

we

switches

are

shown

at

Il.

SPLIT

OPERATION

USING

THE

FY-901

(Figs.

|

and

2)

Split

operation,

using

the

FT-901

VFO,

FT-901

memory,

or

the

FV-901

VFO

or

memory,

makes

a

number

of

interesting

combinations

possible.

Prectical

applications

of

split

operation

will

be

offered

at

the

end

of

this

discussion.

Split

operation

adds

one

more

level

of

decision-

making

to

the

logical

process,

but

the

procedure

is

identical

to

that

of

the

previous

section,

Funda-

mentally,

the

decision

is

made

to

receive

on

the

FT-901

or

the

FV-901,

and

from

there

control

is

transferred

according

to

the

requirements

of

the

situation.

Following

the

decision

tree,

let

us

decide

to

operate

split.

while

receiving

on

the

FV-901.

Push

EXT.

Further,

let

us

decide

that

we

will

listen

on

the

FV-901

VFO,

while

transmitting

on

the

FT-901

VFO.

Push

RX

MR:

this

will

transfer

frequency

control

from

the

FT-901

to

the

FV-901

on

receive,

with

transmit

control

remaining

with

the

FT-901.

Now

we

must

select

the

operating

mode

of

the

FV-901.

PressCVFO)

to

provide

VFO

control

of

the

FV-901.

However,

the

button

may

also

be

pressed.

The

reason

is

as

follows:

the

EX

MR)leaves

the

FV-

901

in

the

VFO

mode

on

receive,

and

transfers

control

to

the

memory

bank

on

transmit.

But

we

already

decided

that

transmit

control

was

to

be

by

the

FT-901

when

we

pressed

RX

MR,

Therefore,

the

“selection

between

(VFO)

and@X_

MRis,

in

this

case,

trival.

Another

example

follows:

Let

us

decide

to

re-

tive

on

the

FT-901

VFO,

and

transmit

on

the

FV-901

memory

bank.

Following

the

decision

tree,

press

EXT

and

TX

MR;

this

transfers

fre-

quency

control

to

the

FV-901

transmit

(activate

the

MOX

control

to

confirm

this).

Now

press

(MR)

and@PX_MR).

Remember

that

control

has

been

relinquished

by

the

FT-901

only

on

transmit

and

thus

the

condition

of

the

FV-901

on

receive

is

irrelevant.

As

a

result,

we

can

press

(MR

or

CX

MR)

with

identical

results.

on

IV.

PRACTICAL

OPERATING

EXAMPLES

(a)

You

are

operating

on

40

meter

phone,

listen-

ing

for

DX

between

7050

and

7100

kHz,

while

transmitting

above

7150

kHz

(oper-

ators

outside

the

USA

should

reverse

the

preceeding).

Station

DXIDX

heard

on

7095

kHz,

listening

at

7205

kHz.

is

Proceed

as

follows:

If

you

are

tuning

on

the

FT-901

VFO,

mo-

mentarily

press

EXT

and

MR,

and

set

the

FV-901

main

dial

to

7205

KHz.

Next,

push

or(RX

MR).

Return

the

FT-901

to

receive

frequency

control

by

pressing

TX

MR,

leaving

the

EXT

button

depressed.

If

you

were

tuning

initially

on

the

FV-901

VFO,

store

DX1IDX’s

frequency

in

memory

position

1

by

pressing).

Now

tune

the

PV-

901

main

dial

to

7205

kHz

(the

FV-901

ICT

s

hould

still

be

pressed),

and

then

press(RX_MR).

Receive

control

will

be

on

the

memory

(7095

kHz)

and

transmit

control

will

be

on

the

dial

(7205

kHz),

To

listen

to

the

pile-up

calling

DXIDX

on

(b)

(ce)

7205

kHz,

press(VFO).

Should

DX1IDX

begin

to

drift

in

frequency.

the

RX

clarifier

may

activated

to

follow

the

signal.

be

unstable

You

are

net

control

station

for

a

net

meet-

ing

on

14315

kHz.

Stations

call

into

the

net,

then

are

moved

off

frequency,

Prior

to

the

start

of

the

net,

store

typical

QSY

frequen-

cies

(14280,

14285, 14290, 14295,

ete.)

in

the

FV-901

memory

bank.

The

net

control

station

may

then,

quickly,

de

or

not

a

particular

frequency

is

clear

by

press-

ing(RX_MR)and

setting

the

MEMORY

CHAN-

NEL

switch

appropriately.

In

this

way,

41

frequencies

could,

potentially,

be

examined

by

one

station

(40

memory

frequencies

plus

the

VFO

frequency).

rmine

whether

You

are

operating

in

a

DX

contest,

where

a

number

of

desired

stations

are

on

the

band

at

the

same

time.

If

some

of

them

do

not

respond

immediately

to

your

call,

or

if

they

are

not

acknowledging

your

call

area,

store

them

in

the

FV-901

memory

bank

by

push-

ing

EXT

and

MR

or

RX

MR

for

receive

con-

trol

on

the

FV-901,

(VFO)

for

FV-901

main

dial

tuning,

and

@D)

for

frequency

storage.

Then,

by

pressing

(MR)

and

setting

the

MEM-

ORY

CHANNEL

switch

appropriately,

the

various

stations

may

be

checked

quickly.

Total

exposure

on

the

band

thus.

in-

Note

that,

even

though

a

band

change

is

made

in

the

meantime,

the

mem-

orized

frequencies

remain

yalid

upon

return

to

the

band

on

which

they

were

stored!

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