Belcom LS-202E User guide

2.

/.

t)iq

-

Elelcom

[S-202E

SSB&FM HANDY TRANSCEIVER

OPERATING MANUAL

INTRODUCTION

You

are the

ceiver.

transceiver in service.

unit has been carefully engineered and

The

quality

operation

After unpacking

Save

the

transported

proud

owner of our latest

Please read

standards, and should

for many

box and

this operating

years.

packing

for

rernote operation,

material in the event

manual carefully before

give you

maintenance,

CONTENTS

1.

Spec;f'cations

2. Batrety Installation

3. Batlerv Note

....

4. Exlernal Power Supply

Ni

5.

Cd Barte.y

6. ConLrols

7.

Operation

rcuitry

8. C

Troubleshoo

9.

10. P.C.B. layout

Block Diagram

Schematic

Term na

and

ting

Diagram

Pack,

. . .

NP-9

NP-6,

s . . . .

(

N.4A

PLL)

I N.

product,

manufactured to rigid

satisfactory and dependable

or

LS-202E Trans-

the

your

unit needs to be

service.

. . .

placing your

'2
.4

'5
'6

.6
.7

'12
'12

'17

.18

'20
'22

Accessories

Carefully unpack

with the f ollowing accessorles.

Rubber Flex Antenna

your

LS-202E transceiver and check that it is

....

Beltclip.

Hand

Strap

Operating Manual

Optional Accessories

.. ........1

LA-2O1 lvlobile console with front speaker and

LU-2 25W VHF linear arnplifier 0nit.
NP-6 Ouick rechargeable N i-Cd battery
NP-9

CA-910E

CA-1 10E AC charger for NP-9

Ouick rechargeable Ni-Cd battery

charger for NP-6

AC

pack
pack

CS-g12 DC charger for NP-6

'12

CS-1

DC charger for NP-9

SH"1 Speaker/Microphone
SH-2 Headset

SFT-207

AN-2 i

Soft case

). BNC rod antenna

/4

with built-in

VOX

..........

.......1

......1

mobile mount.

7.2v

.

10.8V

supplied

1

SPECIFICATIONS

GENERAL

Frequency

Mode:

Frequency

Operating

Voltage

qfounding:

Output

RF

Culrent

(at

Drain:

9V)

Dimensions:

Weight:

Operating

TRANSMITTER

Power

RF

Modulation:

Bandwidthr

Maximum

Range:

Stability

lmpedance:

Temperature:

I

Range:

Output:

Frequency

Deviation:

144 000-145.995

(uP

SSB
F3(F

L20

7V

-

Negatrve

50 ohrn

30mA

input signal

no

200mA

signa

75OmA

200rnA

7O0mA

165(H)

Projections

179(H)

Porjections

Approx.

a {lexible

-10'C

Hi =

Lo =

SSB =

Fi\,4

Less than

r

5 kHz

to 147

1

VXO

[/), A3J

(-iO'C

ppm

12V DC

unbalanced

in receive

receive

in

I

in transmit

in

in modulated

62(W)

x

x 64(W)

500

rubber antenna

+60'C

-

2.5W

3.5W

1

.5W

0 5W

Balanced

Reactancg

=

FN/

995

kHz or

5

(SSB)

(9V

non-rnodulated

g

(at

(at
(at

(at

3kHz

.2.

in SKHz

N/lHz

MHz

Possible)

more

+60'C)

-

nominal)

rnode with

rnode

mode with

SSB

x 40(D)

44(D)

x

including

9V)

10.8V)

7.2V)

9V)

N/lodulation

Direct

SSB

steps

maximum

with

FiM

SSB

mm exoluding

including

mm

batteries

(PEP),

SSB

Shiit

and

Fl\4

Spurious

Carrier Suppression: Betterlhan 40 dB

Microphone:

RECEIVER

Circuitry: F lt4

Intermediate

Sensitivity: F N,4

Radiation: Better than

Kohm

2

microphone

SSB

Frequency: 1st

2nd

SSB

Buiit-in

Double Conversion

=

Superheterodyne

Sinsle Conversion

=

Superheterodyne

lF

=

lF = 455 kHz

=

-

(s/N

=

-12dBp

{srNAD

Spurious

RIT

Selectivity:

AF Output Power:

Circuit,and

"

tecnnology.

Respon$e: Better than 60 dB

Control: more

may change without

aatings

than

F IVI

=

SSB

=

l\lore

than

ohm loading)

B

t

7.5 k\z/-6 dB,

i

15 kHzl-60 dB

r

1.2 kHzl-6 dB,

r

3 kHzl-60

notice due

dB

-60

Electret Condenser

10.695

'i2dBp

I

400 m W

l\lHz

Better than 0.25

10 dB)

=

Better than

12 dB)

=

1 kHz

to deve

(FN,4)

dB

(10olo

(FM,

O.25pV

distortion,

opment

SSB)

pV

ln

BATTERY

2,

INSTALLATION

1) BatterY

lnsert the

commended)

installation

six AA

into the battery

careful to observe

Battery

replace all six

insert batteries

loading

are failing,

*

Be sure to

2)

size

battery

batteries

case as shown

polarity

batteries

correct

with

(high power

installing.

when

new

with

polarlly.

leakproof

in the diagram.

When the

ones of the

type

Be very

batteries

same type.

re-

To load the

lransceiver

in the

shown

battery

until the

diagram.

case, slide

engages

catch

the

case onto

("clicks")

the

as

3) Operating time

F

l(Hl)TX

lmin. BX 3min.

The voltage/power versus time characteristics

illustration. SSB operation norrnally extends battery

longer

resulting in longer

3. BATTERY

Flvl. Also, use

than

of

operating

NOTE

1) When loading, ascertain that

2)

Never use old and new

different type.

3) Never try to charge norrnal

4) Manganese

peratures

batteries warm to enable normal operation.

5) lt is advisable

for more

and alkaline batteries reduce

(less

than 1O'C), and

to use the optional

satisfactory and longer battery life.

power

low

life.

battery

batteries

type dry batteries

po

it

becomes

NP-6

reduces battery consumption

arity

mixed, nor mix

or

2511

is

shown

is correct.

or alkaline

in capacity

necessary

NP-9 Ni'Cd

in

the above

life

3 to 4 times

batteries

batteries.

at
to keep the

battery

low

o{

tem-

pack

EXTERNAL

4.

The LS-202E

power

t€rnal

is

supply

not direct wire

cigarette

5.

lighter

Ni.Cd

BATTERY

POWER

powered

beyond

the

plug,

etc.

batteries

by

the

LS'202E

PACK

SUPPLY

operating

to car

NP-6.

Never attempt

only

voltage

battery

NP-g

(7

to 12V

(138V

to

DC)

DC) by

use

ex-

Do

usino

The optional

The LS-202E

time will

DC charger

N P'9 as option.

*

to

between

be longer

are available

When the

continue

OoC

NP-9

and

NP-6

can be

operated

than

Ni-Cd batteries

charging.

and

The batteries

45oC.

Ni-Cd battery

even

normal.

for the N

have

will

charging,

when

The CAg10E

been

should

CAI 10

fully

be

P-6, and

in 4 to 6

charge

although

AC charger

E

CS-i 1 2

and

charged, do
charged

at temp€ratures

hours'

charging

CS0912

and

for the

not attempt

6. CONTROLS

AND TERMINALS

O

@

@

1. Antenna

Connect the
system. The optional

2.

S/BATT

This meter indicates the strength

voltage
the red

NEW

Connector

supplied rubber-flex antenna

AN-2

Meter

of the battery

zone

indicate the batteries

to

BATTERY

@

@o

1/4 ).

in the transmit

o@

6l

or any other 50

rod

antenna

of receiver

mode.

have been

EXHAUSTED

@o

can

also be connected.

input signal

pointer

The

worn out.

BATTERY

ohrn antenna

(S)

and the

out oi

comes

3. VXO Control

The VOX control

simultaneouslv bv

ouencies set bv

the thumbwheel swltches

(SSB

only)

is used to shift

+/-5

kHz or more

the transmit

to cover

in

kHz steps.

5

receive frequency

and

gap

the

between

fre.

Tera beat

d iagram.

the

position

varies depending

on

USB or

LSB

mode as

shown

in

Exaple:

N,4ode Thumbwheel

p

u

Lo

the VXO

Adjust

4. RIT Control

RIT control

The

without

tion

adjusting

click stop)

time

5.

Turn

receiver

6. Squelch

This adjusts

control

should

vacant

clockwise

sensitive

control will

sigrals

changing

you

(round

Power switch/volume

clockwise

working

are

the

you

if

OSO).

volume.

control

RIT

the

rotated

heard

be

operating

until the

squelch

raise

heard.

will be

switch

T_-f0l

until

onlY)

shift the

changes,

control.

the

that the

Io

receive signal

the

receive

frequency

your

The

with

set on,

set

threshold

ilTa

4

t

control

(SSB

can

the transmit

are working

to switch

Ensure

operating

fully anticlockwise,

from the

frequency,

setting.

the threshold

loudspeaker'

and adjust

background

Further

I

fi\*

-ffi*

V

frequency

receive

control

RIT

more

and

is lwitched

of the

the squelch

noise

clockwise

operation,

of

tr"., ut the

zuro

zero teatatthe

f

144.1oMHz

=

is heard

by about

frequency

lf the

frequency

should

than two

continue

statlons

rotating

off when

squelch

is open

set the squelch,

To

the squelch

off.

cut

is

rotation of

and

u-position

correctly

can

OFF

be

not in

system

control

is the

This

the

thus

L-position

+/-

kHz

1

the sta-

of

(center

the same

increase

use

With

noise

and

choose

slowly

squelch

by

the

most

be reset

at

to

only strong

a

+5

7.

This switch

wheel

kHz switch

switches.

adds a SKHz

frequency

shift

to that

shown

by the

thumb-

Mode

8.

This switch is used

(L).

9. Noise blanker switch

Thls

switch

switch

is

used to

select the mode:

to

(SSB

only)

pulse

reduce

type ignition

10. Channel selector

These three switches are

operating frequency within the specifications.
100 kHz and 10 kHz steps. A

selection

frequency in 5 kHz steps.

of

for

setting the

+5

kHz switch

11. LED illumination

green

The

wheel switches simultaneous!y. In transmit,

lf

the

should be replaced or charged.

replacing
should stop operating the set and

12.

This

impedance. When a

speaker

earphone

LED i.llunrinates both the

red LED flashes

charging

or

External

socket

is

disconnected.

plug

speaker connector

is for

batteries,

connection of

plug

into the socket.

and off in the transmit mode, the batteries

on

is inserted into this socket, the

Decrease receiver volume before

S/BATT

lf

red LED continues flashingafter

the

the set may be

O

your

plug)

speaker

consult

(3.5

external

(F),

FM

noise.

transceiver to any desired

The switches select

is also fitted

meter

the red LED should

faulty. In

Belcom dealer at once.

or earphone of 8 ohm

(U),

USB

or

as to allow

so

and the thumb-

case,

this

LSB

lMHz,

light.

you

internal loud-

inserting

the

(2.5

13. Externalmicrophone connector

This socket is for use with a remote microphone
such

as the optional SH-l speaker/mic.

socket, the internal microphone is disconnected.

phone

other than

the type of

nicrophone

the

SHI

refer to the following diagram according to

,

to be .rsed.

d

lf a

plug)

plug

(2

Kohm impedance),

is inserted into the

For

use of any

micro-

Electret condenser

2-pin type

PTT SWITCH

type

3-pin

@[

f s-f;

<>i

a

T\u!

3LL

Dynamic

l--g

-

L:.--

PTT

rnic

PTT

SWTICH

mic

--l

,---lM

SWITCH

r+1t--

rc

P LUG

PLUG

condenser

A

wired d;rectly

prevent

i

Kohm impedance

use 2

RF

{l00of

the

to

Jeedback.

i000Pf)

-

microphone

microphone.

must be

unil

to

14. Lamp switch

green

This switch controls the

and the thumbwheel

switches on the top

LED to

15. Hi/Lo switch

This

switch is used to set

position

output

0.5 W at

or

power

switch to

tion.

PTT

16.

Depressing this sMich changes the

transmit.

switch

The red LED indicates transmit

transmit output

position

"L"

position

"L"

17. Battery case

Refer to

4 for

battery

loading

page

18, Charger terminal

For

charing

CS912

switched off.

or

the

NP 6

NP-9 Ni-Cd battery

or

CA-ii0E, CS-112. During

illuminate the S/BATT

panel.

power

to 2.5

(at

and charging.

For

9V).

so as

transceiver over

mode.

local

to reduce battery consum-

pack

using the CA-g10E,

charging, the set should

meter

W at "H"

contacts,

set

the

from receive to

be

Do not connect an external

Use

19.

the Belcom optional

only

+/-

600kHz repeater

offset switch

This switch allows repeater offset and

either up or down 600kHz

.

20. Tone

This

station.

pressed.

switch

is

switch

The 1750 Hz burst signal is transmilted

used to

from the receive

transmit a TONE burst signal

DC

supply

chargers.

directly to thi)

charge terminal.

shifts the transmit

frequency.

to acti!"te repeater

when the

frequency

PTT

swilch

is

HOW

7,

Preparations

1.

N4ake sure the

1')

case
l\,4ount the

2)

3) Set

TO OPERATE

set

observing

the squelch

correct

supplied

control

4) Select the desired

Reception

2.

1) Turn

Set the squelch

2)

3) In SSB

nels.

cnan

volurne

mode, turn

control

is switched

Polarity.

rubbel'flex

mode and

control

the

off,

antenna

rotated

as detailed

fully anticlockwise.

frequency.

clockwise

VXO control

and load

wlth

to switch

page

in

8.

to search

batteries

the BNC

on

for signals

to the battery

connector.

the transceiver'

lletween

3. Transmission

the repeater offset

Set

and speak

LED

at about

will light.

4. Repeater opelation

Set the

the

station

8.

General

The LS-202E

ranges

corporates the

to ensure

repeater offset

Tone switch set

is operated

CIRCUIT

between

high sensitivity

by 1750

DESCRIPTION

is a compact

'144.000

latest

switch

1 O cm

5

-

switch

to ON,

and

PLL

synthesizer

and dynamic

to simplex

from the built-in

"+"

or "-"

to

press

the

Hz tone

handportable

burst signal.

145.995

circuits

'ange

-t2-

position

PTT switch

SSB,

MHz

Press the

microphone.

position

F lvl transceiver

in 5

and uses

PTT switch

The

as required-

and the

KHz steps

repeater

coverrng

dualgate

red

With

lt in-

FET's

RECEIVER

SECTION

both

circuit

D301

Antenna Switching

1)

The

signal

pass

filter

2l

HF Amplrlret

from the antenna

since

The signal from L10l

bandpassfilter

3t

Mixer circuit

The
from

4l

FM lF Amplif

The

signal

the

lst

consisting of

is fed to Q102 to

PLL, and the

ier

lF of 10.695

C8101 is ON, and amplified
with the PLL standard oscillator

to convert to the

2nd lF of 455

FL-104. ICl01 consists of

filter

and squelch

pin

I.

lF

SSB

The

Amplif

lF irequency

crystal filter, when

and Q205.

by CR205,2a6,2Oi

AF Amplif ier

6)

The

circuit. The detected

'

ier

of

CR102 is ON, and

signal

and 208 diode.

The detect€d AF signal

volume to drive the

7l

Squelch

circuit

loudspeaker.

ln FM mode, the squ€lch

voltage is used to control the squ€lch

AGC
squelch voltage is adjusted

107 AF

amplif

ier lC's.

isfed to L101 through the

J301

D302 are OFF.

and

is ampli{ied by

L102, L103and

0101

be mixed with

lst lF of 10,695

i\AHz is derived

l\lHz isappliedto

0103. The signal

by

frequency oI 1O.24l\,4H2 at

KHz

and

limiter amp,

10.695

l\,4H2 from L105

quadrature

from the secondary

is amplified by

is controlled by

by RV202 to

and applied

,

Ll04.

oscillator

from L105.

FL'i01 crystal

is

applied to FL-103

detector, active

AF singal

comes out

isfed to FL102

amplified by

side of

1C103 via

pin

in

control 0105, 106

4104, A2A4

L203 is detected

RV101 audio

of lci01 .

2

In both cases,

SSB.

low-

to the

frequency

filter,when

mixed

then

1C101

and

The

and

at

13

-

-

8)

AGC circuit

In the AGC circuit,

204 to

gain

Meter circuit

9)

In

lC1 01

In SSB,

206 and 208

reduce the sourve

of 0101 and

F[,4,

the

via lCl 02, D'l05

the S-meter

204.

S-meter

via A206,

signal

the

voltage

is driven

and 106.

is driven

D211 and

0203

is detected

in order to

lF

from L203

of

by the 2nd

by the detected

212.

signal

output

by D203

control the

pin

from

from D205,

and

7 of

TRANSMITTER

1l

RF

Circuit

The VCO

mixed by
0304 after
The signal

specified

output

filter.

Microphone

2l

FN,4, the voicesignal

In

eliminating

for frequency

circuit

In SSB, the

balanced
generate

modulator

a

FLl02., and the

mixed with

being

output

plified

PTT Circuit

3)

from D304 and

0304, 303, 302

by

By depressing

transceiver

SECTION

frequency and

D304 and.

L316.

L317,

filtering

is further

through

amplified

pov!€r

and

Amplifier

from the microphone

frequency

voice signal

higher

modulation.

is amplified

together

DSB signal.

resultant SSB

PLL

the

305 is

PTT

5404

in

transrnit

mode.

frequency

carrier

D305, and

L313

L312,

0303,

by

fed to the

with

KHz. and

O401 and

by

the

than 3

The unwanted

amplified

signal

frequency

output

now at

and 301

switch,

final frequency,

to the 2.5W

0402 activates

of

L314

and

0302 and

antenna

isamplified

10.695

sideband

in D304 and

i0.695

amplified

then

bandpass

O301 to

through

applied

applied

i\4Hz carrier

removed by

is

0104, before

by

final level.

1C403 to

N'4Hz are

bandpass

by

to the

to IC404

305.

and

put

bv

filter'

the

IC405

VCO

to

The

is am-

the

PLL

SECTION

PLL

1)

OSC Circuit

The PLL HET. l\,4ixer oscillator

32.32625
before being

shift

frequency upward by 2.5

operated when

Y506. 0507

crystal Y504 the

is turned on to obtain 64.3525

the

MNz is

doubled

mixed with VCO output

circuit is operated when

D506 is turned

provides

the

-600

+5

KHz

shift

for the

is 0509, and

to 64.6525

[,4H2 via L520

crystal

in 0504.

0506 is lurned on so as

+600

KHz. The

on

to

+5

KHz shift

KHz repeater shift is operated

i\4Hz

KHz repeater crystal

-600

KHz repeater shift

obtain 64.9525

+600

for the

from Y503. 0508

Y504.

Y502 at

and t521

+5

The

KHz

to shift the

from

MHz

KHz repeater

when D507

provides

is

Phase comparison, Master

The master oscillator

1C502

pin

6.

is frequency-divided

and

frequency oI

This 5 kHz reference signal and

grammable

lC,

and the

divider are

0502 VCO oscillator

;s

and

tuned

obtained when
The signal

un locKeo.

The VCO

the desired frequency.

Mixer,

3)

The signal

mixed

from 1C501

frequency is doubled by 0505

Programmable

from

with

The output

gramable

divider

frorn the thumbwheel

partor

1C501

VCO control

by D501 and 502

it is locked.

frequency

from 0504

.

phase-compared

generates

pin

dividel

VCO

the

from

1C503. The

switches, and the 5

OSC, VCO circuit

MHz

1A.24

by 1/2A48 to

the output

by 1C501

voltage is obtained

1/2 ot

vari-cap.

4 blocks transmission

is fed to 0503 buffer-amplifier

the

passes

through

programming

YCO oscillator

The desired

after the

VXO oscillator

low

a

data

generated

is

produce

from 1C503

phase-comparison

pin

at

when the

PLL is locked to

circuit in 0504.

pass

filter to

for 1C503 cornes

kHzoutput

by

5 kHz

pro-

1C501

3 of

frequency

frequency is

PLL

and then

pro

fed to com-

at

.

is

OTHERS

Carrier

1)

if,.

carrier

*rri"|-

carrier

Polve r Supply

2l

An

enable
regulated

mission

Tone

The

contains

Oscillator

oti"t

frequency

tr"qu"n"y

frequencY

regulator

lC

th;

5.6V

and

Circuit

1750

a 3.58

frequency

is 10.695

is

10.6965

is

with

transceiver

lC4O2

to

voltage

receive

repeater

Hz

MHz

generated

is

10.6935

low

operate

to

and

access

crystal

tn

N/lHz

MHz

MHz

current

from

lC4O3

according

tone

oscillator

mode'

mode'

'1

2V

1/2048

ln

0307

SSB

0305

by

USB

LSB

ln

consumption

7V to

produce appropriate

to

FM and

to

generated by

is

and

mode'

F l\'4

is ON

is ON

0306

is employed

provides

lC401

nrode

1C504'

divider'

the

and
and

to

trans-

which

TROUBLESHOOTING

9.

lf the transceiver

points:

Symptom Check

No noise a

Not operating on

required frequency

Red LED

on and off

you

lf

contact the dealer who

pleased

to

does not operate

ppears

flashes

have

any

advise.

Power

switch on

Squelch control
€xhausted or'incorrectly

Frequency

N4ode switch

Batteries exhausted

queries

on the operation

supplied the

correctly,

?

advanced too

selector

switches incorrectly set

incorrectly set

unit

please

loaded

check the

far

following

Batteries

of the LS-202E, simply

you,

to

and they will be

-t7-

cv30r

L101

L203

L202

tcl02

LloS

FL104
L109

tc101

L502
Y501

tc502

tc501

L521
L520

rc503

P,C.B.

G

LAYOUT

L102

103

104

'tl

05

I

12

FLl02

Y504

Y502
Y503

tcr01

FIM NIETER

tc102

BALANCED

rc404

PHASE COI\4PABISON

rc501

OSC

rc502

PROGRAMI\IABLE

tc503

CARRIER

Y301

MASTEB

Y50l

LOCAL

Y502

LOCAL

Y503

LOCAL

Y504

FI\,'I

OI

FLl

SS8

FL102

IF CERAMIC

L'I 03

F

IF CERAMIC

F L104

RX

L101

RX

L102

RX

L103

BX

1104

rF corL

1105

1

L108
L109

L202

L203

L31l

L312

L313

1314
L318

L502

1509
L510

L511

L512

L513

L514
RV20I

cv301

cv302
cv303
cv304
cv305

L507

L5O8
L52O
L521

lF colL

FNI

SSB

SSB

TX RF

TX

TX
TX

CARRIER

vco

LOCAL

LOCAL

LOCAL
LOCAL
LOCAL
LOCAL

AGC

TX RF
TX BF
TX

CARRIER
CARRIER
VCO
VCO

LOCAL
LOCAL

AMP

MIXER

FREO-DIVEDER

OSC CRYSTAL

CRYSTAL

OSC

CRYSTAL

OSC

CRYSTAL

OSC

CRYSTAL

OSC

CBYSTAL
CRYSTAL

FILTER

FILTER
FILTER
FILTER

BF COIL

RF COIL

BF COIL
RF COIL

DISC COIL

COIL

IF

COIL

IF

COIL

RF COIL

RF COIL

RF COIL

FBEO

colL

ADJ

FREO
FBEO ADJ

ADJ

FFEO

ADJ

FREO

ADJ

FBEO

ADJ

FBEO

ADJ

TR IMMER

ADJ

TBIMMER

ADJ

ADJ TRIMI,IER

RF

ADJ
ADJ

MU LTIPLE
MU LTIP

LE

MU LTIPLE
MU LTIPLE

DIVIDER

(

COIL

ADJ

TRII\IMER

IMIV1ER

TB

COIL
COIL

COIL
COIL

(+SHIFT)

SHIFT)

IC

FM IF

-i8-

P.C.B. LAYOUT

RV501

RV40l

03

tcl

BV504

''4E*-

IC1O3 AF AMP
IC4OT REGU
IC4O2 POWEFI SWITCH IC
tc403 PowEFr swtTcH tc
rc405
rc504

ToNE tc

Y5O5 TONE CREAMIC OSC
RV4OT FM DEV ADJ

BV2O2 TX METER ADJ
RV5O1 FM FREO ADJ
RV5O4 TONE DEV ADJ

RV5O5 TONE

IC

POWER IC

LATOB

FM t/ C AMP lC

-I'IME

ADJ

RV2o2

rc403

1c402

tc405

tc504

Y505

RV5O5

ITX

BLOCK

DIAGRAML

:gs

999
!.o

IBLOCK DIAGRAM

Elelcom

Printed

76-479-0

in Japan