
© D i s p l a y ( L E D )
The display consists of eight-digit L E D s
indicating a l l the current measurement v a l u e .
© O V E R F L O W Indicator ( L E D )
• The O V E R F L O W L E D is provided to n o t i f y
the user t h a t an overflow has occurred.
© C H A N N E L B (5Hz to 2 M H z ) Input j
U
c k
The C H A N N E L B input juck is provided to
allow object s i g n a l s to enter the counter.
T h i s juck is used f o r frequency r a t i o measure-
ment and t i m e interval measurement.
The C H A N N E L B input juck is a B N C connector
terminated w i t h a resistor of 1.2megaohm.
The m a x i m u m input voltage is 125Vrms.
© 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 ( x 10), the input
signal to channel B is attenuated into 1/10 and
then reaches the counter.
If t h i s s w i t c h is pressed again ( x 1 ) , the input
signal to channel B reaches the counter w i t h o u t
attenuatjon.
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 B only but does not a f f e c t channel A .
© - 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 B signal f o r s y n -
chronization.
If t h i s s w i t c h is pressed
( m ) ,
negative-going
edge w i l l be selected f o r s y n c h r o n i z a t i o n .
If t h i s s w i t c h is pressed again ( J U L ) , positive-
going edge w i l l be selected f o r s y n c h r o n i z a t i o n .
© C H A N N E L A (5Hz to 175MHz) Input juck
The C H A N N E L A input juck is provided to a l l o w
signals to be input to the counter f o r frequency
measurement and period measurement.
In the frequency r a t i o measurement mode, the
r a t i o between the C H A N N E L B inputs and the
C H A N N E L A inputs is measured.
In the time interval measurement mode, the
difference in t i m e between the C H A N N E L B
inputs and the C H A N N E L A inputs is measured.
The C H A N N E L A input juck is a B N C connector
10
Содержание FC-757
Страница 9: ...Figure 1 Front panel 9 ...
Страница 17: ...Figure 2 Rear panel 17 ...
Страница 40: ...A p r o d u c t o f KENWOOD CORPORATION 1 7 5 2 chome Shibuya Shibuya ku Tokyo 150 Japan ...