User`s guide

92 Chapter 3

Basic Digital Operation

Using Waveform Markers

Accessing Marker Utilities

Use the following procedure to display the marker parameters. This procedure uses the Dual ARB

player, but you can access the marker utilities through the

ARB Setup softkey in all ARB formats.

1. Select the ARB waveform player:

press

Mode > Dual ARB

2. Press ARB Setup > Marker Utilities.

Sample range begins on first point of signal

Negative range set between signal and

off time

Example of Incorrect Use

Waveform: 1022 points

Marker range: 110-1022

Marker polarity: Negative

This figure shows that a negative polarity marker goes low during

the marker on points; the marker signal goes high during the off

points. The ALC samples the waveform during the off marker

points.

Marker On

Sampling both on and off time sets the modulator circuitry

incorrectly for higher signal levels. Note the increased amplitude

at the beginning of the pulse.

Marker

Off

Marker On

Marker

Off