Kenwood FC-757, Инструкция по эксплуатации, Страница: 23 / 40

H O L D s w i t c h is updated by the output value
f r o m the new measurement operation.
(6) If R E S E T s w i t c h © is pressed during period
measurement, the measurement value on the
D i s p l a y w i l l be reset to ' 0 ' . If released, a
new measurement cycle w i l l be s t a r t e d .
However, the measurement value w i l l remain
'0' until the new cycle is complete.
Note : If s i g n a l s are input to the C H A N N E L
A input juck w i t h noise and ringing
superimposed on, refer to the item
'Input Adjustment F u n c t i o n s ' of the
preceding section, 'Frequency Measure-
m e n t ' .
5 - 3 Frequency ratio measurement mode
In the frequency r a t i o measurement mode, the
r a t i o of C H A N N E L A input signal frequency
to C H A N N E L B input signal frequency is
measured.
The frequency of the input s i g n a l s to the
C H A N N E L A input juck should be equal to or
greater than t h a t of the C H A N N E L B input
signals f o r higher resolution. In addition, the
frequencies of the input s i g n a l s on the both
channels should be w i t h i n their r a t i n g s .
The frequency r a t i o between the t w o channel
input s i g n a l s is defined a s f o l l o w s .
The r a t i o of number of cycles on C H A N N E L
A to the t o t a l time of the specified number
of cycles on C H A N N E L B ( 1 , 10, 100 or 1000).
Measurement Procedures
(1) Input target s i g n a l s to the t w o channels,
C H A N N E L A and C H A N N E L B .
Note : T h e frequency r a t i o of 'V can be
gained by inputting the same frequency
signals to the t w o input t e r m i n a l s
(2) Select the R A T I O A / B mode w i t h F U N C
s w i t c h @ .
(3) The measurement unit indication L E D s , k H z / ^ s
and M H z / m s , are inactive during t h i s measure-
ment mode because the output value is a r a t i o
between the t w o frequencies.
(4) Select a desired resolution value by using
G A T E s w i t c h © .
The resolution value can be any one of the
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