Advertisement
APPLICATIONS
13
Ideal k e y i n g
W a v e f o r m of s o f t t o n e
3 )
O b s e r v a t i o n o f S S B w a v e f o r m s
M a k e c o n n e c t i o n s r e f e r r i n g t o t h e F i g . 8 .
e x a m p l e , 5 0 0 H z a n d
o b s e r v e m o d u l a t i o n .
n o d e s a r e d u l l o r f l a t , t h e s i g n a l m a y be s p l u t t e r i n g .
w a v e f o r m s c a n a l s o a p p e a r w i t h a n e x c e s s i v e l y large o u t p u t f r o m t h e t w o - t o n e g e n e r a t o r .
w a v e f o r m
Fig. 10 A n example of Morse code envelopes
C o n n e c t t h e o u t p u t o f a t w o - t o n e g e n e r a t o r
1 5 0 0 H z ) t o t h e
m i c r o p h o n e
W a v e f o r m s as s h o w n in t h e F i g . 11 a r e s a t i s f a c t o r y ; h o w e v e r , i f p e a k s o r
Fig. 11 An example of SSB waveforms
W a v e f o r m w i t h c l i c k at k e y d o w n
W a v e f o r m w i t h mal-regulation of p o w e r s o u r c e
i n p u t j a c k of t h e S S B t r a n s m i t t e r
N o t e , h o w e v e r , t h a t s u c h
( f o r
t o
d i s t o r t e d
Advertisement
