Kenwood FC-757, Инструкция по эксплуатации, Страница: 11 / 40

terminated w i t h a resistor of 1.2 megaohm.
The m a x i m u m input voltage is 2 5 0 V r m s .
© A T T x 10 S w i t c h
The A T T (enuation) x 10 s w i t c h is provided to
enable the internal A T T e n u a t o r c i r c u i t
operation.
If t h i s s w i t c h is pressed ( m ) , the input
signal to channel A is attenuated into 1/10 and
then reaches the counter.
If t h i s s w i t c h is pressed again ( M L ) , the input
signal to channel A reaches the counter w i t h o u t
a t t e n u a t i o n .
Note t h a t t h i s s w i t c h can w o r k together w i t h
channel A only but does not a f f e c t channel B.
© - S L O P E S w i t c h
The - S L O P E s w i t c h is provided to permit the
user to select positive-going edge or negative-
going edge of the C H A N N E L A signal f o r s y n -
chronization.
If t h i s s w i t c h is pressed ( - • • - ) , negative-going
edge w i l l be selected f o r synchronization.
If t h i s s w i t c h is pressed again ( J B L ) , positive-
going edge w i l l be selected f o r synchronization.
© L P F S w i t c h
The L P F s w i t c h is used to enable the low pass
f i l t e r circuit operation.
If t h i s s w i t c h is pressed ( m ) , the input signal
to channel A is forced to enter a low pass
f i l t e r of about 10kHz.
If pressed again ( J B _ ) , the input signal reaches
the counter directly. T h i s L P F s w i t c h does not
a f f e c t channel B.
@ T R I G . L E V E L C o n t r o J / P U S H P R E S E T
The T R I G . L E V E L c o n t r o l / P U S H R E S E T is a
knob provided to a l l o w the user to adjust the
trigger level of the input signals to the
C H A N N E L A input j u c k .
If the knob is pressed ( - * * - ) , the trigger level
of an object sine wave signal is set to i t s
center.
If the knob is pulled (
M L )
and then rotated
counterclockwise, the trigger level moves to an
earlier point.
If the knob is pulled ( J H . ) and then rotated
clockwise, the trigger level moves to a later
point.
11