JRC NRD 91 User Manual

2 REV.

o+

INSTRUCTION

RECEIVER

MANUAL

O*

@

flrytnadioCo.,Ild.

MODEL

OUTSIDE

NRD-91

VIEW

RECEIVER

(DESK-MOUNT

TYPE)

ôffiË

o o

#

û

MODEL NRD-91 RECEIVER

OUTSIDE VIEW

(CONSOLE

OR

ô

RACK TYPE)

CAUTION

CONTENTS

1. GENERAL

1.1

FEATURES

1.2

SPEC|F|CAT|ONS

2.

COMPOSTTTON

2.1

STANDARDCOMPOSITION

2.2

oPTtONS

3.

INSTALLATION

3.1

INSTALLATION

3.2

ANTI-INDUCTION

3.3

CONNECTION HOW

3.4

4.

OPE RATION

4.1

4.2

4.2.1

4.2.2

4.2.3

4.2.4

4.2.5

4.2.6

TO

OPERATION PANEL OPERATINGPROCEDURES

Basic

Basic Operation Operation Operation Operation Further

DESCRIPTION

. . . . . .

OF EXTERNAL

MOUNT

AUX

Operation

of DSB of FSK of FAX

Operation

OF THE

TRANSMITTING

CRYSTAL

of of

Reception Reception

Reception

LINES

SSB Reception CW

Reception

. .

.

WAVE

2 2 2

5 5 5

6

6 6 6 9

l0 l0 t2 l3 l3 l3

t4 t4 l5

CIRCUIT DESCRIPTION

5.

RECEIVING SECTION

5.1

5.2

LOCAL SIGANL

PANEL

5.3 POWER

5.4

MAINTENANCE

6.

GENERAL

6.1 GENERAL MAINTENANCE

6.2

6.3 TROUBLESHOOTING

6.3.1 Decline of the

SECTION

SUPPLY

GENERATOR

SECTION

Sensitivity

SECTION

AND CHECK

-l-

t6 t6 l6 t7 l8

t9 t9

.

t9 20 20

6.3

.2 No

6.3.3

Sound . . .

NoiseandBeat

6.3.4 Interference by the

6.3.5

Intermodulation

Appendixed Drawings

Transmitter

of

Parts Arrangements

Diagram

Block Outline

Circuit

Speaker

Drawing

Diagrams

Unit

Your

Station

....

2L

.21

22 23

-ll-

CAUTION

l. Read

2.

3. When the

4.

5.

6. This

1. If

this instruction

When

connecting

measure

Do not turn mounted preadjusted

If knob must be

switohes equipments.

receiver operates

front

MHz

the

receiver

the

AUX

panel.

manual thoroughly before turning on

the BK cable and

transmitting

described

semifixed

the

on

at the

knob

set

has low-voltage-operable

when connecting

mode

waves are strongly

in Paragraph 3.2.

resistors, high frequency transformers, trimmer capacitors, etc.

printed factory.

is set at inadequate

correctlv.

is

actually

circuit board

or removing the

selected at a condition

in the DSB mode even though the AUX

this receiver.

other cables, refer to Fig. 3.3 of

induced in the receiving antenna, take the

unless

position,

ICs and transistors. Be sure to turn

absolutely

receiver is muted.

the

printed

where

additional

necessary,

circuit board and cables to external

Paragraph

crystal

mode

3.3.

counter-

off both

provided,

not

they

are all

because

Therefore, the

is

is indicated on the

MHz

power

the

8. The gradually

completely

().

When

000.0kH2 the played

10. When 3000

illumination

reduced as

at the minimum

the ntode

and 001.4kH2,

display

| .4kHz

of MHz Selector

by LED.

the rnode

and

of LEDS

turning

is

except

is except SSB,

lower limit

the

(Receiving

f-DlMMEil

position.

SSB

MHz

Switch.

frequency,

knob

and Frequency

displays the

LED

In

such

.5

kHz.

limit of

the upper

is

001

Mode

counterclockwise.

Display frequerlcy

a case, Receiver

the received

and Bandwidth

shows

obtained by adding

fiequency

indicators) is

Finally they

the tiequency

receives the frequency dis-

to

fade

between

lMHz to

be

displayed

out

is

-l-

1.

GENERAL

The

model

position,

syuthesizer setting, receiver.

1.1 FEATURES

developed

is equipped

so that

I

Provided

)

The reference fiequencies

2)

Wide This receiver

3)

Digital This receiver receiving

Therefore,

4)

BC band BC band rejector due to MHF

5) Directly The line output or output

6) Entirely The panel

1)

Operable The receiver panel.

this receiver

receiving frequency

indication

the

radio

FAX

is 1.7

circuits are accomodated

section

DESCRIPTION

NRD-91

by JRC

with

over

covers

frequency

the frequency

rejector

strong radio

wave.

connected

can be received

modular

either

on

can be

Receiver

based

in

the first

has

digital

oscillator

is

kHz

and

synthesizer

a

wide frequency

the wide

of

receiving

provided

from

reduces

to

Teleprinter

terminal,

and l.9 kHz

construction

power

AC or

operated

is a highly

on

our many

local

oscillator

enough

with

range

with

100

can be set

the interferences

wave

600St

in

the

supply

DC

performances

of PLL

the high

receiving

frequencies

Hz

of

AUX mode. respectively.

in

unit).

power

on

stability

range

frequency

light

emitting

digit

to l0

correctly.

the

broadcasting

and FAX

0 dBm,

plug-in

the

Thus, maintenance

AC

or DC

reliable

year's

type

for

such

provided.

is

experiment

prvode

to

for

(t5

reception.

range

diodes

MHz

as

At this time,

type

power

receiver

use

x

digit.

cross-modulation

wave

printed

by changing

with the

the high

in the

l0-6ppm)

from

for

generating

By

adding the

the

circuit

and

technical

accuracy

SSB mode

ensures

90 kHz

a numerical

optional

center

frequency

boards

check are

the

simple

to 29.9999

and intermodulation

during

power

circuit

results.

of

frequency

as a

back-up

high

stability

MHz.

display

receiving

crystal, FSk

of

the line

(excluding

facilitated.

switch

com-

PLL

of

of the

the

on

the

1.2

SPECIFICATIONS

I ) Receiving frequency

9O kHz

2)

Circuit system Double frequency

I st

2nd IF Reception

3) CW(AlA),

(F3C)

to 29.9999

superheterodyne

lF- : 7 0.45

:

range

MHz

synthesizer.

5 MHz

455 kHz

mode

MCW(A2A,

with

HzA),

up-conversion

DSB(A3E),

,2-

system

SSB(R3E, H3E,

using

phase-locked

a

J3E)

and FSK(FlB)

digital

or FAX

FSK and

But Receiving

4) emitting

Light Tuning

5) Continuous

rotation

6) Sensitivity

method

(minimum

FAX are

frequency

diode

tuning

option.

indication

for six-digit

with MHz

steP:

100 Hz)

numerical

knob,

UP/DOWN

display

(

MHz- to

I 0

switch

{

Hz- digit)

100

and TUNE

knob

of l}kHzl

------_-_ Receivùg

frequency

90-

200-

1.6-29.9999

15çt

Output 100

1)

Selectivity

-\!tenuation BandwidÈ=--=-

Mode

-----

199.9

1599.9

standard

kHz

6

kHz 2-2.6

3

kHz

0.5

kHz

MHz

signal

Bandwidth

rnW,

generator

2O

l0

2

3 kHz,

6 dB

4.4

AIA

pY

or

pV

or

pY

or

directly

is

400 Hz

bandwidth

or

kHz

1.0

0.5-

less 60 less less

more kHz

30

6

connected

30%

kHz

A3E

pV

pV pV

modulation.

60

less

or

less

or

less

or

to

bandwidth

dB

kHz

l0

6 kHz 3 kHz

the

or or

or less

pV

3

antenna

less less

J3E

or less

terminal

't

!

r

-'"

.'J

\

o,t t,g

S/N

'.

1

û''1

'!."1

.

!

20

dB,

i._;-

d'l

I.

1,'i:

Frequency

8) I hour

receiving

the

9)

Image

60 dB IF

l0)

60 Spurious

I l)

60

12) Blocking The level separated AGC

rejection or

rejection

or

dB

dB or

input

of

ON)

stability

l5-1rilute

after

frequency

more

ratio

n-lore

response more

level

wanted

the

by

ratio

the

of

2OkHz

preheating

MHz or

is 1.6

)

unwanted

or

by 3

more

signal

signal dB,

from

t

10 x l0-6

in

more

is more

under

wanted

the

-3-

less,

or

than

signal

mode.

l0 mV

the SSB

a condition

under

but

which

where

of l0pV.

the

suppress

unwanted

the

(SSB

condition

the

signal

mode,3kHz,

where

output

is

l3)

Cross-modulation The cross-modulation signal

signal

I4)

Interrnodulation The interference

l5)

AGC The variation

l6)

AF characteristics

Speaker output Line output

Headphone

Frequency Distortion

l1)

Radiation

l8)

Norninal input 50-75

l9)

Variable range !2

20)

Variable range t50

2l)

Power AC DC

22)

Temparature range

-10"C

23)

Dimensions Without the

149(H) x 480(W) x

With the

190(H) x 489(w) x

of 90

or"rtput.

second or

characteristic

100

rnV.

I x

lO-eW

ohrns

kRz

or more

Hz or

supply power power

to

output

response

factor

or less

more

supply supply

+50oC,

and

cabinet case

output,

dB

is added

third intermodulation

waves of 20

of the

impedance

of BFO

of

Clarifier

9s%

weight

at the

kHz

detuned

AF or-rtput

lW or more l

mW

or more

lOmW 3 dB or Speaker output Line output

100/110/200

24V!10'/o

relative

and

+35oC

at

294(D)

305(D) excluding

excluding

which

or more

(negative

humidity

is

wanted

output,

are

is l0

dB

(6000)

(6004)

less at

the frequency

3%

l220Ytl0%

protuberence

generated

signal

of

which

added,

or less

3% or

or less

grounded)

is

for

less

at I mW

50160

when

the 20 kHz

60 dB,

at

is

generated

is

below

the wanted

the

antenna

range

500mW

Hz

approx. 30vA

approx. 25W

Approx. j ke

Approx. I1.5

30 dB

of 300 to

or

when

input

detuned less fbr

the

signal

level

3000

kg

unwanted

the

two 80

output.

of

Hz

wanted

dB

pV

3

to

-

4-

2. COMPOS|TION

2.1

STANDARD COMPOSITION

The composition

type.

Receiver Cabinet case

Speaker Power cable BK cable Instruction manuâl ANT Connector

parts

Spare Test data

*

2.2 OPTIONS

Spare

parts

include:

of

One

receiver

this

NRD-9 MPBX I

NVA-92

'ZCJDOOOO5

MPKCO3

M-P_7

6ZXJD5IO43

each

of BK

depends

I

083 2

I 08

relay,

and

on its

fuses.

type,

that is, desk-mount

Provided type

for

600a lw

Provided type

t

for

Remarks

only the

type or rack

desk-mount

Headphones

power

DC Extension card

Additional

cable

cr1'stal

Item

fbr maintenance

Model or

ST-3

I

code Remarks

MPKCOI74I I For

CMH-330

I | | | |

600 ohms

|

DC24V

Used for

|

in

operation

Crystal to

AUX In case of FSK 456.7 kHz In

position

case

checking

be mounted

FAX

of

each

456.9 kHz

PC

in

boad

the

-5--

INSTALLATION

3.

INSTALLATION

3.1 (

I

When installing the receiver

)

on the Then, flx holes

at two

(2)

When installing

of

side

the receiver

positions

separate order). Attaclt the slide rails of the receiver

by

case

screwing

and mount

the

chassis

in

of

receiver

the

(supplied

the 5-mm

on the

on

the rails,

position

both

left

and right

by

on the

with

the receiver

screws

through

l9-inch

and

screwing

desk,

Llse

the

cabinet

in the

standard push

sides

rack,

the receiver

the

5-rnm

of the front

the special

case) onto

cabinet

case.

four mounting

place

to the

screws

panel.

cabinet

left

Fix

the receiver

holes

on

guide

the

inside

through

(optionally

and right

the front

provided

bolt

of the rack.

the mounting

available

sides

of

chassis

to the

cabinet

panel.

on

3.2 ANTI-INDUCTION When the receiver

transmitting

When

protected anlpere, the input

When

receiving in

series

Receiving

wave of own

the induction

by the built-in

circuit

receiving

the

antenna

betweetr

antenna

as

the receiving

OF THE

is operated

current

antenna suf-fers

far

as

i- ç?(e}

-{çf-'-_----_--..

TRANSMITTING

paired

a

in

transmitting

may

station is

of the

input

of

protective

the receiver

with

induced

fiom

possible

l/\l

trom

autenna

l00v

60w 100v

01 PL1

PL1

the

and

antenna input

a-f

WAVE

transmitter,

the receiving

waves is

circuit.

be

such

But if the

burnt out.

an excessive

transmitting

I

60w

I

02

|

#to'

antenna, or connector

it sometimes

antenna.

I ampere

or less,

induction

insert

as shown in Fig.3.l.

Q

happens

current

current, move

the anti-inducer

-

rl ll

L_

AW-01

'18

Anti-inducer

__J

that

the

the receiver

exceeds

the

to

tne[Àtrtrlconnecter

is

I

3.3 CONNECTION (l)

receiver is

This For AC

of the

(option)

operation, conrlect the

nrair-t

to

LO_.9_?4

Fig. 3.1

EXTERNAL

OF

operable

tratne.

Protection

in either

For DCI

located

of the

Receiver

LINES

ACl00tlO%

power

AC

operation,

on the rear

-

6,

by the

(50/60

cable to

connect

panel

of

Anti-inducer

Hz)

[nC

the

DC24V!lO%.

or

tO()Vl

DC

located

power

the main frame.

on

cable

rear

panel

the

MPKCQ|74I

When

changing connection the

location

of

the

of the

power

the

power

transformer

transformer,

voltage

see the

at the

located

annexed

installation

inside

the

part

arrangement

place,

change

chassis as shown

drawing.

the terminal

in Fig.

3.2. For

o

(2)

Connect

(3)

Connect

(4)

If the

tBK

600O details.

the

grounded

the

break-in

Lin[Êl

&

balanced

I

20vAC2

antenna

cable to

relay

circuit

connector.

line

output)

1Oo/o

wire

AC200Vr

the | ,ANT-I

to the

is to

terminal

be used,

The AF

can be

l Oolo

Fis.3.2

connector

H

connect the

output

signal

also taken

provided

on the rear

special

(600S,

out

unbalanced

from

this connector.

I I

I

rT1

I I I I

I

I I I

at the

panel.

cable

panel.

rear

(MPKCO3

speaker

output,

See Fig.

108)

to

the

and

3.3 for

o

DC

AC

power

E xterna

power

I

NRD-91

panel

Rear

Fis.3.3

-7

-,

Line

output

To FAX.

Headphones

?lt- rr

9ilL5t I

Speaker

(600f,l

recorder,

Tape

(Option)

ST*3

\

NVA-92

balanced, 0 dBm)

FS demodulator,

etc.

Item

Indication

Cable

and connector

Color

Explanation

I

2

3 4

I OOV,

AC

r

t0v

200v, 220V

DCz4V

ANT BK&

LINE

Connector

HS l6P-2

Cable 6ZCJDO0005

Connector

Cable

M-P-3ls

HS l2P-2

MPKCO

17

4l

Connector

S- 13

I2-CEA

Cable

MPKCO3l08

I

White For

2

Black

I

White

2

Black

I

White

2

Red

3 Black

4

Green

5 Silver 6

power

AC

The cable receiver,

is mounted

shipped.

is attached

only

+24V

OV (grounded)

Antenna

-BK

+BK

input

(key

signal)

(BK

power +24Y)

E

Speaker Shielded Not used

(common

input

when

the receiver

in

the cabinet

For DC

input Cable is option.

600s}

unbalanced

lW

output ground)

with the

and

power

7

White

8 Red 9

Black

l0

Green Not

ll Silver

t2

Line Line Center tap

used Shield.ed Not

(common

used

600s,

balanced, 0 AF output

ground)

dBm

-8-

3.4

HOW

TO MOUNT

AUX CRYSTAL

adding the crystal to

By output can be 1.7 kHz the frequency output

456.7 AUX crystal of

I

. Insert the crystal into

2.

3.

can be connected to FS demodulator

kHz in FSK reception

your

desirable

Mount

Connect two holes means of the Connect

the beat

If crystal is mounted

Note) The beat

indication

space,

the crystal according to

the speaker and

with the noise mode

one of FSK, FAX

mode or the

leading wire.

sound comes out through

from

the AUX mode

in case of FSK reception

on the

AUX

(AUX)

turn

correctly.

sound can

in DSB

DSB

panel

456.9kH2

and

frequency

the

(X3)

on CMH

positioned

on the

be easily

mode, because the noise increases when

to AUX.

to the wanted receiving frequency,

in FAX reception.

or other

of the

following

-379

near

power.

the speaker when

known

position, and I .9

or FAX.

desirable

crystal

procedures.

the

kHz

when ordering.

2nd

IF

connector

by

comparing

the center frequency

in FAX

The

mode is

unit and solder it.

setting the

reception

frequency

this receiver

Since

available.

(PlO)

on the

mode

the noise

of the crystal is

Please

in AUX mode

of the

when setting

and

same unit by

to AUX, the

changing the

line

this line

has one

inform us

-9 -

4.

OPERATION

4.1

OPERATION

runo-sr

[Jmll

PANEL

lnecrtven

i:i

r

|

MH,

!:,

'-

,='11

'-rH,

| | rr^hr

k-3,--

BANDW'FT"

- |

J

No.

I

2

3

PEAKER

Meter

DIMMER

Receiving

indicator

Control

knob

frequency

BFO & CLARIFIER

RF

GAIN

Indicating AF output

Used

for brightness LEDs

fade

Keep

this

Displaying numbers. displayed frequency

the

strength

(line

output)

adjusting

by this knob

out

in

the

In

and

is

the

if this knob

your

mind

receiving

case of

in

case of

displayed.

AF

GAIN

Function

of the receiving

brightness

according

is turned

when

using

frequency

SSB

mode,

modes

the

other

ON

REJECT

0t

OFF

sr-ow$

waves

of all LE,Ds.

to

the

fully

this receiver.

by

6-digit

carrier frequency

than

OFF

AGC

I

/orl

OFF/ T

or

Adjust

circumstance.

counterclockwise.

numerical

SSB, the assigned

pOWER

g

DC

level

the

is

of the

4

BANDWIDTH

indicator

5 MODE

indicator

Displaying BANDWIDTH

and 6 kHz)

Displaying

(one

the

of

SSB, CW,

-

l0

bandwidth

selector

A

mode

specified

DSB

and

-

of the IF filter

switch

AUX)

(one

by the

of

MODE

specified

0.5 kIHz,3

switch@

by

the klHz

No.

Control

Function

6

MODE selector Used for selecting the

1 BANDWIDTH

selector

METER selector

8

switch

reception *oà.

changing the mode from

and AUX). DSB

and CW to

1.5 kHz from frequency indicatorO frequency is option, mode actual reception mode is DSB even though is

indicated by the

Selecting the bandwidth of frequency)

Selecting setting this switch to wise, and the meter

HF input of the

the

LINE, the meter indicates

balanced).

When

frequency obtained

the

SSB,

the

original

is displayed in case of SSB

make

a special order if

is specified when the optional crystal is not mounted,

MODE

(one

the

setting

pointer

0.5 kHz,3

of

content

the AGC

indicates the

frequency

is

. This

to be indicated

turning

S,

receiver.

because that the

indicator.

IF

the

kHz

RF

switch @ to FAST or

relative signal

When

the line output level

(one

one of

is displayed

reception.

necessary.

the AUX mode

(intermediate

filter

kHz).

6

and

for

the meter(D.

GAIN

setting

@

this switch to

of

by

If this AUX

strength of

SSB, CW, DSB

AUX,

subtracting

on the

carrier

Since AUX

When

fully

clock-

SLOW,

(6000

9 SPEAKER

l0 PHONES

ll

t2

MHz selector

BFO & CLARIFIER

jack

knob

l3 RF GAIN

t4 TUNE

knob Used for

jack

knob

for

Used

speaker

Used for

headphone

Used for setting the MHz The full rotation

Serving knob

(BFO) telegraph signal This

FIER) of This can vary the

fiequency by more Gain controller

recommended receiving

The

connecting

of 600C1 impedance.

connecting

of 600C2

as BFO

can vary the frequency of

by more

knob

also serves

receiving tiequency

the

signal for

setting the receiving frequency in 100 Hz

full rotation

the

the optional headphones, impedance.

of this knob

adjustment

t2

than can be adjusted.

as a

center

than

for

the RF

to adjust according to

obtaining the optimum volume.

changes the

special speaker,

digit of the receiving

covers 30 bands

knob in

45 5

kIIz.

Therefore,

fine

adjustment knob

frequency

t50

Hz.

amplifier and IF amplifier.

receiving frequency

NVA-92

case of

kHz

in SSB

of

CW mode.

beat oscillator

the tone

and AUX modes.

the oscillating

strength

the

ST-3 or the

frequency. (

or the

I MHz

(CLARI-

step).

This

of the

It

of

the

steps.

by l0 kHz.

is

l5

UP/DOWN

switch

Fast forward

pressing

decreases) at a speed

switch of the receiving frequency.

(or

UP

-

DOWN),

-

ll

While

fiequency

the

of approx. 125 kHz/second.

increases

(or

No.

Control

Function

t6 LOCK

l1

t8

t9

20

AF GAIN

Attenuator

AGC

BC BAND REJECTOR

switch

knob

switch Used for

switch

Used for be to the locked will

@ condition,

This is a volume headphones. line

receiver.

HF for near distance strong neighboring to the OFF

Used for circuit

The FAST and the

CW or

to OFF, are saturated.

knob Set this switch

cross-modulation radio interferes

locking

changed

not

and UP/DOWN

output

attenuator for

the

by

careless misoperation.

condition

be changed

press

And this

(600O

selecting

better reception

and the desired

position.

selecting

and selecting

position

SLOIV

SSB

the

@

wave

position

signal

AGC circuit

Thus,

for

the best

to

of the

the MHF

the set frequency

this

adjustment

affected

ON

or

broadcasting

(pressed),

even

though operating

switch

knob

balanced) on

the

ON

the receiver

when

signals

the

ON or

the discharging

for

is

is normally

control

receiving

for

intermodulation

reception.

.

@

again.

knob for

does

or

OFF

input.

the signal is received

signal is interfered

etc.

But usually,

OFF condition

the reception

fading.

by

remains

the

better reception

wave

electrically

By setting

receiving

the

f'or

releasing

the speaker

not

af'fect the level

rear

the

condition

Set this

time

of DSB

f

or

the reception

By setting

inoperative

gain

by

condition.

due

(525

so

as not

this

frequency

the TUNE

the locked

or

panel

of

the

of the 20

switch

at the

due

set this

constant.

the RF GAIN

to the strong

to 1605

switch

of the

AGC

signals,

this switch

and signals

when

kHz)

to

switch

knob

of

the

dB

to ON

to

the

of

the

2l POWER

4.2 OPERATING Before turning

(

I ) Power

The located on the within the

(2)

Antenna Check that each connecting firmly they are correctly

switch

voltage check

label, which shows the nominal

system check

connected. When the antenna

Used for selecting

PROCEDURES

rear

set

power

panel

switch,

of

the receiver.

part

on the

range of the nominal

turning AC or DC

check the following items.

power

value

of the

ON or

power

voltage,

Check

!lO%.

antenna cable to

coupler

and antenna

OFF the

is

that the

*-t2-

power.

supply.

placed

above the

power

be connected

changer are used,

Also used for

power

voltage

to

connector

to be

receiver

this

check that

used

is