Agilent Technologies 54501A Especificaciones descargar pdf (Pagina 82)

Tfiggef

Video

signals

are unique, and as such

have

unique

requirements

for

Exercise

Sffi.ffiffiff""ffi?:ffi:

""*howtodispravandwork

Instrument

Setup

Use

a standard

NTSC signal

generator

with

clamped video

output for

this

exercise. Turn

color bars on.

Oscilloscope

Setup Connect

the

NTSC video

signal to channel

1of

the

I{P

545104.

PTessAUTOSCALE"

Select the

tv trigger

mode.

Set 60Hzli2ilines and

channel

as the

souroe.

Determine

the

polarity

of the sync

pulse.

Select the

trigger

level

and

rotate

the knob

until

a stable display

attained.

When

a slmc

pulse

is visible,

determine

the

polarity,

select

polarity (press

the

function key)

and

set the spc

pulse

acdordance

with

the actual

pulse.

Set the trigger

level at approximately

the

midpoint

the sync

pulse.

This

sets the

trigger

level

just

below

the middle

of the

slmc

pulse

and tells

the

oscilloscope to trigger on the

lsading

edge.

Set trig'd/auto to

trig'd.

This

eliminates

the

possibility

of a

premature

trigger event

occurring.

Select

field I and

line 1.

Press TIMEBASE and set time/division

100rrs/div.

54510A

Front-Panel

Reference

Trigger

429

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 160 161

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