JRC NDR-91 User Manual

turn on the
attenuator
of the receiver.
Explanation
Intermodulation
Some
radio waves
with different
frequencies are
frequency-converted
due
to the
antenna
multi-coupler,
arrester-diodes and
the non-linearity
of amplifiers and
mixers
in the
receiver. This
frequency-converted radio wave
equal to the
receiving frequency
and interferes
the
reception.
This
phenomenon
is
called intermodulation.
For
example,
assuming
that
the receiving
frequency
fn
is
3855
kHz, and other strong
interference
wave
fu,
is 3925 kHz,
f'=2fu,
-
frr.
If
fu,
,
in which a relation of 3855
kHz=7850
kHz
-
fu2 exists
(in
this case,
3995
kHz), is very strong, the
mixed signal of 3925
kHz
and 3995
kHz
will be
heard through the
receiver which
is
set
to
3855
kHz.
-24-

JRC NDR-91 Specifications

General

Brand	JRC
Model	NDR-91
Category	Receiver
Language	English