Kenwood CS-6020 Instruction Manual page 21

(4) LEVEL Controls and SLOPE Switches
Trigger point of w a v e f o r m is adjusted with the L E V E L
controls and S L O P E s w i t c h e s . Fig. 11 s h o w s the set-
ting relationship between the L E V E L and SLOPE for trig-
ger point adjustment. Level of the trigger point shall be
adjusted as necessity requires.
- S L O P E r a n g e
+ S L O P E r a n g e
Fig. 11
(5) FIX Switch
Selecting F I X of the T R I G MODE s w i t c h e s @ enables
w a v e f o r m to be triggered close to its center, eliminat-
ing troublesome trigger level adjustment.
If the trigger level is set on one side of the signal w i t h
NORM of the T R I G MODE s w i t c h e s @ selected as
s h o w n in (a) or (b), Fig. 1 2 , lowering of the input sig-
nal causes displacement of the trigger point, resulting
in immediate stoppage of s w e e p operation.
If F I X of the T R I G MODE s w i t c h e s (§) is selected, the
trigger level is a l w a y s set close to the waveform center
automatically even though amplitude changes (Fig.
11 -(c)), resulting in stable triggering, regardless of set-
ting of the L E V E L controls (§), (§). Besides, abrupt
changing the input signal from square w a v e into pulse
w a v e usually c a u s e s the trigger point to shift to the
negative (—) side of the w a v e extremely, unless the trig-
ger level is re-adjusted as s h o w n in (2) and ( 3 ) , Fig.
13-(a). Consequently, if input signal changes into pulse
w a v e under the condition where the trigger point has
been set on the negative side of the square w a v e as
s h o w n in ( 1 ) , F i g . 13-b, s w e e p may stop due to dis-
placement of the trigger point. To avoid such a trou-
ble, set the T R I G MODE (§) to F I X ; signals are a l w a y s
triggered close to the w a v e center, enabling stable
w a v e f o r m observation (Fig. 13-(c)).
T r i g g e r p o i n t
T r i g g e r
p o i n t
T r i g g e r
p o i n t
Fig. 12
+ d i r e c t i o n
L E V E L
— d i r e c t i o n
( 1 )
( 2 )
( 3 )
( 4 )
' N O R M "
" F I X "
T r i g g e r
p o i n t
P u l s e w a v e i s i n p u t
R e - a d j u s t L E V E L
(a) In c a s e t r i g g e r l e v e l i s s e t n e a r w a v e f o r m
( N O R M )
0
T r i g g e r p o i n t
S w e e p s t o p s d u e t o d i s p l a c e m e n t f r o m t r i g g e r
T r i g g e r p o i n t
R e - a d j u s t L E V E L
(b) In c a s e t r i g g e r l e v e l i s s e t o n n e g a t i v e s i d e o f
( N O R M )
(c) In c a s e o f F I X
Fig. 13
L E V E L
c e n t e r
L E V E L
p o i n t
S a m e l e v e l s e t t i n g a s ( 1 )
w a v e f o r m
T r i g g e r e d r e g a r d l e s s
o f L E V E L s e t t i n g
21