29
1.Turn on the radio
2.Extend the antenna fully straight up
3.Set the BFO switch to ON.
TO RECEIVE CW
SPECIAL SSB/CW RECEPTION TECHNIQUES
M a n y
s t a t i o n s
t r a n s m i t
u n m o d u l a t e d
t e l e g r a p h t r a n s m i s s i o n s i n t h e s h o r t w a v e
b a n d . To r e c e i v e t h e s e s p e c i a l M o r s e c o d e
c h a r a c t e r s , t h e r a d i o u s e s a s p e c i a l c i r c u i t
a
o s c i l l a t o r , t o m o d i f y t h e
t r a n s m i t t e d s i g n a l s o t h a t y o u c a n h e a r i t .
t h i s p a r t i c u l a r t y p e o f t e l e g r a p h t r a n s -
m i s s i o n i s c a l l e d
w a v e ( C W )
t r a n s m i s s i o n .
b e a t - f r e q u e n c y
c o n t i n u o u s
Many stations transmit voice signals with a
suppressed carrier in the
.
(SSB), part of the radio transmission
spectrum that lies to the side of the primary
frequency signal. Many amateurs who
operate transmit below 10 Mhz general ly
use the
(LSB). Above 10
MHz, they usually use the
(USB). Commercial utility stations generally
use the USB. A carrier has to be added to
make these signals audible.
single side band
lower side band
upper side band
-
Содержание ATS-818ACS
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