JRC NDR-91 User Manual

1.
GENERAL
DESCRIPTION
The
model
NRD-91
Receiver
is a highly
reliable
receiver
with the
simple
circuit
com-
position,
developed
by JRC
based
on
our many
year's
experiment
and
technical
results.
PLL
syuthesizer
is equipped
in
the first
local
oscillator
to
prvode
the high
accuracy
of
frequency
setting,
so that
this receiver
has
enough
performances
for
use
in the
SSB mode
as a
back-up
receiver.
1.1 FEATURES
I
)
Provided
with
digital
synthesizer
of PLL
type
The reference
oscillator
with
the high
stability
(t5
x
l0-6ppm)
ensures
high
stability
of
fiequencies
over
a
wide frequency
range
for
reception.
2)
Wide
receiving frequency
range
This receiver
covers
the wide
receiving
frequency
range
from
90 kHz
to 29.9999
MHz.
3)
Digital
indication
of
receiving
frequencies
This receiver
is
provided
with
light
emitting
diodes
for
a numerical
display
of the
receiving
frequency
from
100
Hz
digit
to l0
MHz
digit.
Therefore,
the frequency
can be set
correctly.
4)
BC band
rejector
BC band rejector
reduces
the interferences
such
as
cross-modulation
and intermodulation
due to
the
strong radio
wave
of
the
broadcasting
wave
generating
during
receiving
the
MHF
radio
wave.
5) Directly
connected
to
Teleprinter
and FAX
The line output
terminal,
600St
0 dBm,
is
provided.
By
adding the
optional
crystal, FSk
or
FAX
can be received
in
the
AUX mode.
At this time,
the
center
frequency
of
the line
output
is 1.7
kHz
and l.9 kHz
respectively.
6) Entirely
modular
construction
The
circuits are accomodated
in
the
plug-in
type
printed
circuit
boards
(excluding
the
panel
section
and
power
supply
unit).
Thus, maintenance
and
check are
facilitated.
1)
Operable
on
either
AC or
DC
power
The receiver
can be
operated
on
AC
or DC
power
by changing
the
power
switch
on
the
panel.
1.2
SPECIFICATIONS
I
)
Receiving frequency
range
9O kHz
to 29.9999
MHz
2)
Circuit system
Double
superheterodyne
with
up-conversion
system
using
a
phase-locked
digital
frequency
synthesizer.
I st
lF- : 7 0.45
5 MHz
2nd IF
:
455 kHz
3)
Reception
mode
CW(AlA),
MCW(A2A,
HzA),
DSB(A3E),
SSB(R3E, H3E,
J3E)
and FSK(FlB)
or FAX
(F3C)
,2-

JRC NDR-91 Specifications

General

Brand	JRC
Model	NDR-91
Category	Receiver
Language	English