JRC NRD-545 Manual de usuario

MODEL

NRD-545

daftanRadio

Co.,

JUd.

INTRODUCTION

Thismanualdescribes

the

basic

operatingprinciples

ofthe

NRD-545DSPreceiver

and

itemsrequired

forits

maintenance.Pleaserefer

tothe

UserManualsuppliedwith

the

equipment

forhowto

operate

and

handle

the

NRD-545.

The

NRD-545consists

eightunits.Eachcircuit

has

beendesigned

minimize

the

number

locationsthat

mightrequireadjustmentwith

the

passage

time,

andso

increaseoperatingstability.

Itis

thereforeonlynecessary

service

the

equipmentaccording

tothe

instructionscontained

thismanualwhen

fault

becomesapparent.

Pleaserefer

tothe

table

units

andbe

sure

enter

the

name

and

type

onthe

formwhenorderingreplacement

unit.

Please

refer

tothe

partslists

and

enter

the

unit

type,part

No.,

type,

and

codewhenorderingparts.

CONTENTS

SPECIFICATIONS

FRO

PANEL

AND

REARPANEL

2-1

FRONTPANEL

2-2

REARPANEL

LAYOUT

UNITS

ASSEMBLYDRAWING

BLOCK

DIAGRAM

DESCRIPTION

CIRCUITS

6-1

OUTLINE

BLOCKS

6-2

DESCRIPTION

UNITS

ADJUSTMENT

7-1

PREPARATION

7-2

CBD-1363

POWERCIRCUIT

7-3

CDE-860

DISPLAY

UNIT

7-4

CGK-160

REF/DDS

UNIT

7-5

CGA-184

LOOP1UNIT

7-6

CDA-752

DSP

JJNIT

7-7

CFH-71

1ST

UNIT

7-8

CFL-356

TUNEUNIT

7-9

INTEGRATEDADJUSTMENTS

7-10

CHE-199

WIDEBANDCONVERTERUNIT

TROUBLESHOOTING

8-1

SIMPLEPROBLEMS

8-2

MORESERIOUSPROBLEMS

8-3

MAINTENANCE

CIRCUITDIAGRAM

ANDPCB

LAYOUT

9-1

CIRCUITDIAGRAM

9-2PCB

LAYOUT

9-3DC

VOLTAGE

FOR

EACHTRANSISTOR

9-4DC

VOLTAGE

FOR

EACH

10.

OPTIONAL

UNITS

10-1INTRODUCTION

10-2

REMOVINGCOVERS

10-3REMOVINGINTERNALUNITS

10-4FASTENINGCOVERS

11.

LEVELDIAGRAM

SPECIFICATIONS

(1)

Operating

frequencyrange

(

Modes

Reception

)

Frequency

stability

)

Minimum

tuning

step

(5)

MemoryCapacity

(

Receivingsystem

(7)

Sensitivity

With

optionalboard

CHE-199

installed:

NRD-545J:

0.1~252.9MHz,

255.l~261.9MHz

266.1

~270.9MHz,

275.l~379.9MHz

382.l~411.9MHz,

415.l~809.9MHz

834.l~859.9MHz,

889.l~914.9MHz

960.1~1999.999MHz

NRD-545G:

0.1~1999.999MHz

NRD-545U:

0.1~823.9MHz,

849.l~868.9MHz

894.l~1849.9MHz,

1910.l~1929.9MHz

1990.1~1999.999MHz

USB,LSB,

CW,

RTTY,

AM,

FM,WFM

(withoptionalboard

installed)

(Note:

USB,

LSB,

CW,and

RTTYmodes

are

available

below30MHz.

WFM

mode

available

30MHz

more.)

lOppm

less

after

5 to60

minuteswarm-upperiod;

2ppm

per

hour

less

from

then

0.5ppm(withoptionalTCXO

mounted)

IHz

(lOHz,

lOOHz,

1kHz,5kHz,6.25kHz,9kHz,10kHz,12.5kHz,

20kHz,

25kHz,30kHz,50kHz,100kHzstepsavailable)

1000channels

(frequency,

mode,bandwidth,ATT,AGC,

and

tuningstep)

Triplesuperheterodyne

1stIF:

70.455MHz

2nd

IF:

455kHz

3rd

IF:

20.22kHz

^^—

--___

'i-t

S9Q9Q9MH7

30-1000MH7

USB,LSB,

CW,

RTTY

WFM

Bandwidth:

USB/LSB/CW/RTTY/AM:

2.4kHz

S/N:

lOdB,

Modulation:

400Hz,

30%

(whenmeasuringAM),

12dB

SINAD(whenmeasuring

FMand

WFM).

Note:

The

sensitivity

30MHz

moremeasuredwith

CHE-199

UNIT

installed.

Selectivity

WIDE

INTER

NARROW

Bandwidth

4.5kHz

2.4kHz

1kHz

10kHz

6dB

4.5kHz

2.4kHz

1kHz

10kHz

60dB

8kHz

less

5kHz

less

4kHz

less

The

WIDE,INTER,

and

NARROW

are

only

examples.

The

bandwidth

canbesetas

desired

between

0.01

and

9.99kHz(except

for

AMS,

FM,

and

WFM).

)

Dynamic

range

(10)

Image

rejection

(11)

Spurious

response

(12)

rejection

(13)

PBS

variable

range

(14)

NOTCH

attenuation

(15)

NOTCH

variable

range

(16)

NOTCH

tracking

range

(17)

Antenna

impedance

(18)

Attenuator

(19)

AGC

characteristics

(20)

Audio

frequency

output

(21)RS-232C

interface

(22)Power

requirements

(23)

Dimensions

(24)Weight

106dB

(IF

bandwidth:300Hz)

70dB

60dB

70dB

2.3kHz(50Hzsteps)

40dB

2.5kHz

(lOHz

steps)

10kHz

(Lo-Z

terminal)

600Q

(Hi-Zterminal)

Approx.20dB

lOdB

less

variation

audio-frequencyoutput

relation

toa

changebetween

3//V

and

lOOmV

antennainput

Releasetime:40mS

5.IS

(20mS

steps)

Speakeroutput:

(4Q

load,

10%

distortion)

Lineoutput

and

recordingoutput:

ImW

more(600

load,

10%

distortion)

Baud

rate:

4800

baud

(characterstructure:

startbit,

data

bits,

no-paritybit,

stop

bit)

100/120/220/240V

10%,40VA

less

DC12to16V

(standard

13.8V)

30W

less

330(w)x 130

(143)

(h)x 285

(327)

(d)mm

Valus

parenthesesincludeprojections.

Approx.7.5kg

Notes:

Specifications

and

appearance,etc.,

are

subject

changewithoutpriornotice.

2.Inthe

event

ofa

mismatchbetween

the

manual

and

operation

ofthe

actual

equipment,

operation

the

actual

equipment

takesprecedence.

FRONT

PANEL

AND

REAR

PANEL

2-1

FRONTPANEL

TONEcontrol

GAINcontrol

AGCT

button

®BWC

(bandwidthcontrol)button

CHSEL

(channelselect)button

STEPbutton

LOCKbutton

SCANbutton

Tuning

control/torque

control

SWEEPbutton

©RUN

button

ECSSbutton

®AGC

button

NOTCHcontrol

GAINcontrol

NOTCHbutton

LEVEL(squelchlevel)control

LEVEL(noiseblankerlevel)

control

RECORD

jack

PHONES

jack

POWER

switch

(noise

blanker)

button

ATT

(attenuator)button

DIMMER

button

CLOCK

button

FM/WFM

button

NR/BC

(noisereduction/beatcan-

celler)button

AM/AMS

button

USB/LSB

button

CW/RTTY

button

NARROW

button

INTERbutton

WIDE

button

FREQ

(frequency)button

LCD

display

(UP)

and<

(DOWN)button

(channel)button

Numericalkeypad

FUNC(function)button

MHz

button

ENT/kHz

button

CLR

(clear)button

PBS

(passband

shift)control

FINE

control

2-2

REAR

PANEL

ANT

Lo-Z(low-impedance)connector

ANT

(antennaswitch)

ANT

Hi-Z(high-impedance)

terminal

LINE

OUT

jack

LINE

OUT

jack

EXT

(speaker)

jack

MUTEjack

OUT(DC

output)

jack

TIMER

OUT

terminal

RS-232Cconnector

powerconnector

Fuse

holder

powerconnector

Voltageselector

WBANT

(wideband

antenna)

connector

itT

CFL-356

TUNE

CFH-71

1STIF

CHE

199

WIDE

BAND

CONVERTER

(OPTION)

CGA-184

LOOP!

CGK-160

REF/DDS

CDA

752

DSP

•<

—

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