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because i t s resolution functions better than the
channel A ' s one.
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C H A N N E L A ( 5 H z to
The C H A N N E L A input juck is provided to
object signals to enter the counter.
If the frequency of less than 100MHz is measured,
every kind of cycle is measured, or event inputs
are counted, t h i s juck is used a s the
T h i s juck is a B N C connector terminated
resistor of
1.2Megaohm.
N o t e : If a 50ohm system is connected to t h i s
counter, the Channel A Input juck needs to be
terminated w i t h a resistor of 5 0 o h m . Please keep
it in mind.
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A T T x 10 S w i t c h
The A T T ( e n u a t i o n ) x 10 s w i t c h is provided to
enable the internal A T T e n u a t o r circuit operation.
If this s w i t c h is p r e s s e d ( x 10), the input signal to
channel A is attenuated into 1/10 and then reaches
the counter.
If this s w i t c h is pressed again ( x 1 ) , the input
signal to channel A reaches the counter w i t h o u t
attenuation.
10
100MHz) Input
J u c k
allow
input.
w i t h a
Note t h a t t h i s s w i t c h can work together w i t h
channel A only but does not affect channel B.
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L P F S w i t c h
The L P F s w i t c h is used to enable the L o w Pass
F i l t e r circuit operation.
If this s w i t c h is p r e s s e d ( J U L ) , the input signal to
channel A is forced to enter a low pass f i l t e r of
about 100kHz.
If pressed again (
I, )
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.
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R E S E T S w i t c h
The R E S E T s w i t c h is provided to clear the counter
into 0. T h i s s w i t c h can w o r k , independently of any
operation mode selected by F U N C s w i t c h ( 1 3 ) .
If t h i s s w i t c h is pressed(
reset to 0.
If this s w i t c h is r e l e a s e d ( J R . ) , a new measurement
w i l l be s t a r t e d .
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H O L D S w i t c h
The H O L D s w i t c h is provided to perform v a r i o u s
operations shown below. Note t h a t the H O L D
s w i t c h functions depend on operational modes
the input signal reaches the
f
the counter w i l l be
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