Agilent Technologies 54501A Specifiche Scaricare il pdf (Pagina 63)

when

exite& a trigger is

generated

on the

first

transition that makes

the

pattera

false. The

pattern

must

be true and

go

false

to

generate

a

trigger.

r&en

prcsent >

: a trigger

is

generated

when

a trigger

pattern

is

true

longer

than

a specifigd

minirnurn

tine

period.

This

time

period

is

specified in

the next

selection

key

that is activated when

present

>

is

selected. The

present >

time ranges from

20 ns to 160 ms

rvhen prcsent

(

: a trigger

is

generated

when

a trigger

pattern

is

true

less

than a

specified

maximu'n

time

period.

This

time

period

is

specified

in

the ne:d selection key

that

is

activated when

prrsent <

is

selected.

The

prcsent

(

tims

ranges

from

20 ns to 160 ms.

.

range:

this trigger condition is a combination

of

prcsent

<

and

present

>.

A

trigger

is

generated

when

a

trigger

pattern

is

true

for

longer

than

a specifisd

rninirnum

and shorter

than a specified

maximum

tirne

period. These

time

periods

are

specified

in

the next

two

selection keys

that are activated when range

is

selected. The frst

range

time

setting

must

be

less

than

the second 1""ge

time setting.

holdoff

Key

The

holdoffkey

assigns

the

entry devices

to control holdoff.

Holdoff

disables

the trigger

circuit for a selectable

time

period

or number

of

events

after

the trigger

event.

Holdoff is

selected in time

urits, from 40 ns

to 320 ms

and is incremented in 20 ns

intervals

or by number

of

patrn

(patterns)

from 2

to 16 000 000.

Pattern

Trigger

Exercise

This

exercise

demonstrates how

to define the

3-bit

pattern

and how it

affects

the trigger

and the

resulting

display.

Note

Set the

triger

level

for

each triger source while

in the

edge mode.

These

tiger

levels must be set before

you go

to the

pattem

mode,

or

proper

tigeing

may nol occur.

Trigger

Menu

sl0

HP

54510A

Front-Panel

Reference

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