EZ Digital OS-3060D Especificações descarregar pdf (Página 78)

7. Count the

numb

er of horizontal division s between the 10% p

oint

(central v

eni

eal graticule line)

and

the 90% point.

Mul

tiply the number

divisi

s counted in Item 7 above by the

numerical value of the

TIM

/DIY

switch, then you w

obtain the

measured risetime. Where the mode is XIO

magn

ification, divide the

value

the

TIME

/DIY

setting by 10. F

exampl

the

TIME

/DIY

switch was set to Ips,

and

the

measurement

was con

duc

ted as shown

in Fi

gur

e 2-l la, the risetime w

ould

be 360ns. ( I

OOO

-=-

10 =

lOOn

ns X 3.6div = 36005 : because the m

ode

is XIO magnificati

9. Wh en

mea

surin

g Ialltime, simply

make

the 10%

poin

t in fall time

align

with the

cen

tral venical graticulc line,

and

perf

orm

the

mea

surem

ent

conform

ing

to the procedure sel

out

in Items 7

d 8

above.

10. When

measuri

ng the rise and fall time. note that 17.5ns-Rise lime

(tr)=O

.35/f-

.'JH

which is

tran

tion time iscontai

ned

in the OS-30

:20D

nese

lf. Therefore the

real

tra

nsi

tion time uc) is

Ill

JX)SeJ

of measure transition time(tnu and tr,

The above all is explained with

e followin g formula:

Ic = Real transition time

tm= Measured

tran

sition time

tr - Rise lime of oscilloscope

tr= 17.5ns:

-30200

tr = 8.8ns:

-30·100

tr = 5.8

ns:

3()(,(J0

* For the instrument equip

ped

with R

EADOUT

functi

, positi

ing

cursor

and

6 cursor to 10% and 90% re

spe

ctively

make

s it possible

to measure rise/fall t

ime

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EZ Digital OS-3060D Especificações Página 78

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