User manual

ATSC/DVB-3 User Manual P/N 821507 Rev-D

Front Panel Features

Section 2: Operation

Phase Indication LEDs (IN, AVG, OUT)

These three LEDs indicate the instantaneous and average phase (polarity) conditions between the source(s) assigned to the

left speaker channel and the source(s) assigned to the right speaker channel. The larger LED labeled AVG indicates the

average phase condition between the left and right speaker channels. The two smaller LEDs labeled IN and OUT indicate

the instantaneous phase relationships. Indication is as follows:

• The left IN LED glows (or blinks) GREEN for in-phase signals.

• The right OUT LED glows (or blinks) AMBER for out-of-phase signals.

• The large center AVG LED indicates the average phase condition by glowing GREEN for in-phase signals, or RED for

out-of-phase signals.

In general, observing the AVG LED alone is sufficient for proper phase monitoring. While it is normal for stereo signals to

contain some intermittant instantaneous out-of-phase and in-phase conditions (IN and OUT LEDs), a steady RED glow of

the AVG LED indicates an out-of-phase alarm condition.

Headphone Jack

This jack accepts a standard 1/4” phone type stereo plug. When you plug in headphones, the internal speakers will mute.

Input Status LEDs (AC-3 and PCM)

One of these two LEDs will glow GREEN to indicate which kind of signal is being received at the selected input; either the

left LED for AC-3 (Dolby Digital®) or right LED for PCM (Pulse Code Modulation or standard AES).

Pro-16 Select Switch and Indication LED

In the event that you are processing two different Dolby Digital Pro-16 data streams it is possible to select between the two

with this toggle switch. The LED will glow AMBER if such signals are present. In the absence of such data streams, the

LED will not be lit and the switch will be nonfunctional.

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