Realistic DX-440 Car Satellite Radio System User Manual


 
SPECIAL
SSB/CW
RECEPTION
TECHNIQUES
RF
GAIN
RF
GAIN
BFO PITCH
'"
BFO PITCH
USB
MIN
00
i'
ODD
4 5 6
CJ
CJ
CJ
7 8 9
CJ CJ CJ
O/SEC EXECUTE
CJ
( 1
FM
AM
LW
MW
SW
00000
i'
LIIIIIIIIIIIR
BALANCE
~
LOIIIIIIIIIIIHI
TREBLE
~
5.
Rotate the
RF
GAIN control to the
MAX position
7.
Tune
in
the CW station using the
tuning knob, or enter the frequency
using the direct access buttons.
6.
Press the
AM
band button to select
the AM band.
4.
Rotate the BFO PITCH control to the
midpoint.
00
use
M,..
..~x
BFO HTCH
RF
GAIN
POWER
i'
MINI
I I I I I I I [ I
IMAX
VOLUME
~
iFMi
MONO
STEREO
BFO
LOCK
!DIBmJ
. . .. ..
WIDE NARROW OUT IN OUT iN
LAM-.J
"*'
Many stations transmit voice signals
with a suppressed carrier
in
the single
side
band.(SSB),part of the radio trans-
mission spectrum that lies to the side
of the primary frequency signal. Amat-
eurs tend who transmit voice below 10
MHz use the
lower side band (LSB).
Above 10 MHz, they use the
upper side
band
(USB). Commercial utility stations
generally use the USB. A carrier has
to
be
added
to
make these signals audible.
1.
Turn on the radio.
3.
Set the BFO switch to
IN.
2.
Extend the antenna
fUlly
straight
up.
Many stations transmit unmodulated
telegraph transmissions
in
the shortwave
band. To receive these special Morse
code characters, the radio uses a
special circuit, a
beat-frequency oscill -
ator, to modify the transmitted signal
so
that
you
can hear it. This particular type
of telegraph transmission
is
called Con-
tinuous wave (CW) transmission.
TO
RECIEVE
CW
28
29