JRC NRD-545 Manuel utilisateur
*
*
"
:
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
of
eightunits.Eachcircuit
has
beendesigned
to
minimize
the
number
of
locationsthat
mightrequireadjustmentwith
the
passage
of
time,
andso
increaseoperatingstability.
Itis
thereforeonlynecessary
to
service
the
equipmentaccording
tothe
instructionscontained
in
thismanualwhen
a
fault
becomesapparent.
Pleaserefer
tothe
table
of
units
andbe
sure
to
enter
the
name
and
type
onthe
formwhenorderingreplacement
unit.
Please
refer
tothe
partslists
and
enter
the
unit
type,part
No.,
type,
and
codewhenorderingparts.
CONTENTS
1.
SPECIFICATIONS
1
2.
FRO
NT
PANEL
AND
REARPANEL
3
2-1
FRONTPANEL
3
2-2
REARPANEL
4
3.
LAYOUT
OF
UNITS
5
4.
ASSEMBLYDRAWING
6
5.
BLOCK
DIAGRAM
7
6.
DESCRIPTION
OF
CIRCUITS
8
6-1
OUTLINE
OF
BLOCKS
8
6-2
DESCRIPTION
OF
UNITS
9
7.
ADJUSTMENT
15
7-1
PREPARATION
15
7-2
CBD-1363
POWERCIRCUIT
16
7-3
CDE-860
DISPLAY
UNIT
17
7-4
CGK-160
REF/DDS
UNIT
19
7-5
CGA-184
LOOP1UNIT
20
7-6
CDA-752
DSP
JJNIT
21
7-7
CFH-71
1ST
IF
UNIT
22
7-8
CFL-356
RF
TUNEUNIT
25
7-9
INTEGRATEDADJUSTMENTS
26
7-10
CHE-199
WIDEBANDCONVERTERUNIT
34
8.
TROUBLESHOOTING
41
8-1
SIMPLEPROBLEMS
41
8-2
MORESERIOUSPROBLEMS
42
8-3
MAINTENANCE
43
9.
CIRCUITDIAGRAM
ANDPCB
LAYOUT
44
9-1
CIRCUITDIAGRAM
44
9-2PCB
LAYOUT
56
9-3DC
VOLTAGE
FOR
EACHTRANSISTOR
72
9-4DC
VOLTAGE
FOR
EACH
1C
76
10.
OPTIONAL
UNITS
86
10-1INTRODUCTION
86
10-2
REMOVINGCOVERS
89
10-3REMOVINGINTERNALUNITS
90
10-4FASTENINGCOVERS
90
11.
LEVELDIAGRAM
91
92
1.
SPECIFICATIONS
(1)
Operating
frequencyrange
(
2)
Modes
of
Reception
(3
)
Frequency
stability
(4
)
Minimum
tuning
step
(5)
MemoryCapacity
(
6)
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
at
below30MHz.
WFM
mode
is
available
at
30MHz
or
more.)
±
lOppm
or
less
after
5 to60
minuteswarm-upperiod;
±
2ppm
per
hour
or
less
from
then
on
±
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
^^—
--___
0
'i-t
S9Q9Q9MH7
30-1000MH7
USB,LSB,
CW,
RTTY
AM
FM
WFM
Bandwidth:
USB/LSB/CW/RTTY/AM:
2.4kHz
S/N:
lOdB,
Modulation:
400Hz,
30%
(whenmeasuringAM),
12dB
SINAD(whenmeasuring
FMand
WFM).
Note:
The
sensitivity
of
30MHz
or
moremeasuredwith
CHE-199
UNIT
installed.
Selectivity
WIDE
INTER
NARROW
FM
Bandwidth
4.5kHz
2.4kHz
1kHz
10kHz
6dB
4.5kHz
or
more
2.4kHz
or
more
1kHz
or
more
10kHz
or
more
60dB
8kHz
or
less
5kHz
or
less
4kHz
or
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).
(9
)
Dynamic
range
(10)
Image
rejection
(11)
Spurious
response
(12)
IF
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
or
more
60dB
or
more
70dB
or
more
±
2.3kHz(50Hzsteps)
40dB
or
more
±
2.5kHz
(lOHz
steps)
±
10kHz
50
Q
(Lo-Z
terminal)
600Q
(Hi-Zterminal)
Approx.20dB
lOdB
or
less
variation
in
audio-frequencyoutput
in
relation
toa
changebetween
3//V
and
lOOmV
antennainput
Releasetime:40mS
to
5.IS
(20mS
steps)
Speakeroutput:
1W
or
more
(4Q
load,
10%
distortion)
Lineoutput
and
recordingoutput:
ImW
or
more(600
Q
load,
10%
distortion)
Baud
rate:
4800
baud
(characterstructure:
1
startbit,
8
data
bits,
no-paritybit,
1
stop
bit)
AC
100/120/220/240V
±
10%,40VA
or
less
DC12to16V
(standard
13.8V)
30W
or
less
330(w)x 130
(143)
(h)x 285
(327)
(d)mm
Valus
in
parenthesesincludeprojections.
Approx.7.5kg
Notes:
1.
Specifications
and
appearance,etc.,
are
subject
to
changewithoutpriornotice.
2.Inthe
event
ofa
mismatchbetween
the
manual
and
operation
ofthe
actual
equipment,
operation
of
the
actual
equipment
takesprecedence.
2.
FRONT
PANEL
AND
REAR
PANEL
2-1
FRONTPANEL
CD
TONEcontrol
(D
AF
GAINcontrol
®
AGCT
button
®BWC
(bandwidthcontrol)button
(D
CHSEL
(channelselect)button
©
STEPbutton
®
LOCKbutton
®
SCANbutton
(D
Tuning
control/torque
control
®
SWEEPbutton
©RUN
button
©
ECSSbutton
®AGC
button
®
NOTCHcontrol
©
RF
GAINcontrol
®
NOTCHbutton
SQ
LEVEL(squelchlevel)control
NB
LEVEL(noiseblankerlevel)
control
RECORD
jack
PHONES
jack
POWER
switch
NB
(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
CH
(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
SW
(antennaswitch)
ANT
Hi-Z(high-impedance)
terminal
LINE
OUT
R
jack
LINE
OUT
L
jack
EXT
SP
(speaker)
jack
MUTEjack
DC
OUT(DC
output)
jack
TIMER
OUT
terminal
RS-232Cconnector
DC
powerconnector
Fuse
holder
AC
powerconnector
Voltageselector
WBANT
(wideband
antenna)
connector
o
D
m
I
oo
o
h
itT
P
i
j
CFL-356
RF
TUNE
1
i
j
CFH-71
1STIF
i
CHE
-
199
WIDE
BAND
CONVERTER
(OPTION)
i
j
CGA-184
LOOP!
1
ii
CGK-160
REF/DDS
1
i
i
CDA
-
752
DSP
i
3
o
CD
O
1
GJ
O)
W
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m
J]
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<
1
,
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