(2) S E N S.
A tte n u a to r fo r ad ju stin g th e am p litu d e o f th e w av efo rm to be se n t to
th e S c h m itt trig ger circ u it b e tw e e n th e se n sitiv ity v o ltag e an d th e m ax i
m u m in p u t v o lta ge.
Waveform at p o in t A
SENS.
x 1
V b
V a
OV
SENS.
x1 0
Waveform at p o in t B
V B
V a
OV-
_ n
_____
W h
ov
V b /10
Va /10
SENS.
x100
OV
V a /1 00
If ap p ro p ria te S E N S, is n o t se le cte d , co u n tin g m a y fail o r th e trigg er
p o in t m a y d ev iate w h en th e in p u t ex c eed s th e m ax im u m in p u t vo ltage.
T h e a tte n u a to r is also e ffe ctiv e fo r no ise re je c tio n . (F re q u e n c y m ea su re
m e n t F R E Q . A , C )
Input
Shaped o u tpu t
SENS, x 1
SENS. x10
5-3
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