Agilent Technologies 54501A Specifiche Scaricare il pdf (Pagina 56)

trlgU/auto

Key

The trig'd/auto

selection

toggl€s

betcrcen

the

two triggcr

modcs.

The

cturent

selection

is displayed in

inverse vidco.

This field

is

arnilable in

all

trigger

menus.

In

the

trig'd

mode,

the oscilloscope does

not

display

data

until all

of the

trigger

requirements

are satisfied.

While

waiting

for

the

trigger

requirements,

the message an'aitingnigr

is

displayed.

In

the auto

mode,

if

a

trigger

is not found"

a trigger

is

generated

and

acquired

data

is

displayed. A

status

message

is

displayed

in

the upper

left

corner

of the

scroen.

source Key

The sourte key

selects the

trigger

souroe.

The

options

are

channels 1

or 2,

or external uiger.

The

current

selection

is

highlightsd

in

inverse video.

level

Key

The

level

key

sets the trigger level.

The

range

on this

function is

+

12

divisions

from

center.

It

provides

flexibility

for

sening

exact

triggering

points

and specifies levels used in the

more

sophisticated

triggering

modes.

The

center

can also be selected

with

centered.

slope

Key This field is

not

labeled,

however, the

available

selections

are

graphic

representations

of the

rising

edge and falling

edge The

current selection

i5

highlighrcd

in inverse video.

noise

reiect

Key Turn noise reject

on for triggering on noisy.signals

without

the

problem

of

false triggering.

holdoff

Key Pressing

the

holdoff key

assigns

the

entry

devices

to control

holdoff.

Holdoffdisables

the trigger circuit

for

a

selectable

time

period

or

number

of events after the trigger event. Holdoffis

selected in

20 ns

time

increments, from

40

ns

to 320

ms

or

in number

of events

from 2

to

15 000

000.

Time and event

are toggled

with

the knob.

Events

are

number of

patterns (patrn),

state

(state),

or edge

and

w

(edge).

HP

545104

Front-Panel

Reference

Trigger

Menu

s3

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