How to tune in ssb transmis sions, 3 adjust the tuning with rne tuning, Ssb (single side bmd) – Sony ICF-SW7600 User Manual
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How to Tune in SSB Transmis sions
FINE TUNING
ЛГ1
•L58 f-
•—uieJ
1
ШВ
§°§
§§§
1 Set AM MODE to LSB or USB.
Position
Type of broadcast
NORM
When not using FINE TUNING or when
not listening to SSB transmissions
FINE
When adjusting LW, MW, or SW band
(DSB-Ooubie Side Band) precisely with
FINE TUNING
LSB’’
When tuning in ham and CW transmissions
below 10 MHz
USB"”
When tuning in ham and business radio
above 10 MHz
*t Lower side Band
*2 Upper Side Band
2 Tune in a frequency near the broadcast you want to
listen to by using mamiai tuning (Page direct
tuning (Page #), or preset tuning (Page #).
3 Adjust the tuning with RNE TUNING.
SSB (Single Side Bmd)
SSB Is very popular among ham and business radio and will be
found on all of the amateur bands because of its signal
inteiligibility. This results from that it transmits signals with half
bandwidth of OS6 (Ooubie Side Band).
Typical AM (MW. LW. SW) band uses DSB. In DSB
transmission, the amplitude of a carrier is modulated according
to transmitted frequencies as shown below.
Ampiitude
Amplitude
Carrier
Time
LSB
Я1
Frequency
Audio signals are included both in USB and LSB. These signals
included in USB and LSB are the same ones except that they
are in the opposite phase relation.
This means that trsmsmission can be done using only one of
USB and LSB. SSB transmission is the system in which such a
method is used, in general, SSB transmissions up to 10 MHz
shall employ LSB modulation, and those above this frequency
shall use USB. To receive SSB transmission, the unit with the
BFO (Beat Frequency Oscillator) circuits is needed to convert
SSB signals into audio signals. SSB cannot be heard with the
radio which has no such circuits.
CW (Continuous Wave)
CW is also popular among ham and business radio. In CW
transmission, the amplitude of a carrier is not modulated while
that of other systems is modulated. CW conveys information by
interrupting a carrier using Morse code. It can be heard as a
beat sound only with the unit equipped with the BFO circuits. To
understand information transmitted by CW, you need to learn
the Morse code.