Acterna MS1400 Spécifications télécharger pdf (Page 68)

2-20

Adjusting The Scale

The scale setting is displayed above the graph. You can adjust the

scale to provide the best view of the carrier levels by pressing the

Enter Scale Submenu soft key. A new set of soft keys appears.

Use the Increment/Decrement soft keys to increment and

decrement the scale value. Press Exit Scale Submenu soft key

when you have finished.

Checking Limits

You can verify that the carrier levels are within limits. First, you need

to tell your MS1400 which test point you are at. This determines

which set of limits is used. Press Cycle Through Test Points soft

key to sequence through the available test points. The test point

that you have selected is represented in the upper portion of the

screen by one of the following icons:

Subscriber Drop

Ground Block

Tap

User Defined

NOTE: Be sure that you have enabled all of

the test points that you are interested in using.

The Cycle Through Test Points soft key is

only available if there is more than one

enabled test point. (see How To Edit Test

Points page 1-20).

When you have selected the proper test point, your MS1400 shows

the minimum and maximum carrier level limits for that test point on

the graph. When the cursor is on an analog channel, video min and

max are used. When the cursor is on a digital channel, the digital

min and max are used. The min and max hash lines will change as

the cursor moves. The out-of-limit portions appears as diagonal

“hash” areas. You can toggle the hash lines on and off by pressing

Toggle Display of Hash Lines key.

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 99 100

Pas de commentaire

Acterna MS1400 Spécifications Page 68