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2 REV.
o+
INSTRUCTION
RECEIVER
MANUAL
O*
@
flrytnadioCo.,Ild.
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MODEL
OUTSIDE
NRD-91
VIEW
RECEIVER
(DESK-MOUNT
TYPE)
ôffiË
o
o
#
û
MODEL NRD-91 RECEIVER
OUTSIDE VIEW
(CONSOLE
OR
ô
RACK TYPE)
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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
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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-
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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-
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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
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
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
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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
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
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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
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)
(6004)
less at
the frequency
3%
l220Ytl0%
protuberence
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-
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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
only the
type or rack
desk-mount
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--
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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
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
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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
I
I
I
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
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.
![](/html/2a/2a10/2a1044e5f75b1168d18b57e3e7c2ca7d03c1a935cf25421f8e5818e5bc05bf2b/bgc.png)
Item
Indication
Cable
and connector
Pin
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
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-
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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 -
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4.
OPERATION
4.1
OPERATION
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PANEL
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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
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
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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
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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
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
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
is