Kenwood FC-758 Instruction Manual page 21

The m a x i m u m input frequency is 1 0 M H z .
(1) Select the T O T A L / 1 0 M H z (event input t o t a l
measurement) mode w i t h F U N C switch
The selection by G A T E switch
significance in this measurement mode.
(2) If you w a n t to control the event input t o t a l
measurement (event counting) externally, use the
input gate signal to T O T A L I Z E I N P U T
S T O P juck © on the rear panel.
If the T T L H - l e v e l signal is input to t h a t ter-
minal the event counting
If the terminal level becomes inactive ( T T L ' L '
level), the event processing w i l l be terminated.
In this case, the t o t a l number of events is held
by Display © .
If no signal is input to the T O T A L I Z E
S T A R T / S T O P juck, t h a t is, if the terminal
left ' o p e n ' , the count operation
out because the terminal
(3) R E S E T switch @ is provided to reset the counter
display to ' 0 ' .
If the s w i t c h is released w i t h T O T A L I Z E
S T A R T / S T O P juck ©
@ .
@ has no
S T A R T /
is enabled.
I N P U T
is
w i l l be carried
level is T T L ' H \ ? ? ?
I N P U T
left O P E N , the counter
operation w i l l be started a t the moment.
If the T O T A L I Z E I N P U T S T A R T / S T O P
used to control the event measurement, the
counter operation a f t e r the R E S E T switch release
w i l l be dependent on the terminal
It w i l l be started immediately
level is H. Otherwise it w i l l not be s t a r t e d .
(4) Once the event input t o t a l measurement is s t a r t e d ,
the measurement total value is output to the
display L E D continuously. The terminal count is
. 99,999,999 ( M a x . ) . If the t o t a l number of measured
events exceeds t h a t terminal count, O V E R
L E D © w i l l be turned on while the counting
operation s t i l l continues.
(5) The counting operation may terminate in the
following possible cases :
1) The T T L level of the input gate signal to the
T O T A L I Z E I N P U T S T A R T / S T O P juck is L .
In this case, the counting measurement is
terminated and the t o t a l count value is held by
Display (5)„ If the gate signal changes its T T L
level f r o m L to H, the counting
w i l l be started a g a i n .
juck is
T T L level.
if the terminal
F L O W
measurement
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