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4.
PANEL E X P L A N A T I O N
4 - 1
Front Panel
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P O W E R O N - — . / Q F F J B . S w i t c h (See Figure 1.)
The P O W E R ON J U L / O F F M s w i t c h is provided to
apply power to this counter. If pressed ( J « - ) , the
counter w i l l be turned on. If pressed a g a i n ( J K L ) ,
the counter w i l l be turned
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G A T E L E D
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k H z / ^ s
Indicator L E D
The k H z / i « s L E D indicator
the user of the current measurement d a t a unit.
T h i s L E D indicates the unit of the current
measurement operation. If the frequency measurement
mode has a c t i v a t e d , it means t h a t the measurement
value is output in kiloherz. The L E D indicates that
the measurement value is displayed in microseconds
if a period is being measured or the self-check
mode is selected.
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M H z Indicator L E D
The M H z L E D indicator is provided to remind the
user of the current measurement d a t a unit.
T h i s L E D turns on when the frequency measurement
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off.
is provided to
remind
value is displaed in Megaherz.
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D i s p l a y L E D
The display consists of e i g h t - d i g i t L E D s
indicating a l l the measurement values.
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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.
T h i s L E D blinks when any measurement d a t a
exceeds the display range.
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C H A N N E L B ( 8 0 M H z to 1 . 3 G H z ) Input juck
The C H A N N E L B input juck is a prescale input juck
provided t o a l l o w object signals to enter the counter.
If the frequency of greater than 100MHz is measured,
t h i s juck is used a s the input juck. T h i s juck is
terminated w i t h a resistor of 50ohm.
T h i s input juck can be used to measure the frequencies
in the range between 8 0 M H z and 1,300MHz
( 1 . 3 G H z ) .
T h i s input juck can be also used to measure the
frequencies of less than 100MHz. However, it is
recommended t h a t Channel B be used for t h i s purpose
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