Agilent Technologies 54657A Especificaciones descargar pdf (Pagina 22)

•

Turn the Delay knob and notice that its value is displayed in the status line.

The Delay knob moves the main sweep horizontally, and it pauses at

0.00 s, mimicking a mechanical detent. At the top of the graticule is a

solid triangle (

▼ ) symbol and an open triangle ( ∇ ) symbol. The ▼

symbol indicates the trigger point and it moves in conjunction with the

Delay knob. The ∇ symbol indicates the time reference point. If the

time reference softkey is set to left, the ∇ is located one graticule in

from the left side of the display. If the time reference softkey is set to

center, the ∇ is located at the center of the display. The delay number

tells you how far the reference point ∇ is located from the trigger

point

▼.

All events displayed left of the trigger point

▼ happened before the

trigger occurred, and these events are called pretrigger information or

negative time. You will find this feature very useful because you can

now see the events that led up to the trigger point. Everything to the

right of the trigger point

▼ is called posttrigger information. The

amount of delay range (pretrigger and posttrigger information)

available is dependent on the sweep speed selected. See "Horizontal

System" in chapter 5, for more details.

The Oscilloscope at a Glance

To set up the time base

1–12

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 187 188

Sin comentarios

Agilent Technologies 54657A Especificaciones Pagina 22