User manual

AMP2-VSDA/AV and AMP2-VSDA/AM User Manual P/N 821576 Rev-B

Section 2: Operation

(Continued)

Front Panel Features

Phase Indication LEDs

These three LEDs indicate the instantaneous and average phase (polarity) conditions between the two signals in the channel

pair (or downmix) assigned to the left and right speaker channels. The two smaller LEDs labeled FAST show instantaneous

phase relationships in the signal. The larger LED labeled AVG will indicate the average phase condition. Indication is as

follows:

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

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

• The large 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 (FAST LEDs), a steady RED glow of the

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

AES/SDI Digital Source Select Switch

This two position toggle switch allows the operator to choose between the two digital input sources; SDI or AES. When

this toggle switch is set to AES, the unit will monitor the AES signals as input on the AES IN BNC connectors (IN 1 and IN

2) on the rear panel (Item C, page 12). When this toggle switch is set to SDI, the unit will monitor the SDI signals as input

on the SDI IN BNC connector on the rear panel (Item G, page 12).

Balance Control

This control changes the volume balance between the left and right speaker channels. Note that this control attenuates the

signal from the source, so that the left and right bass frequencies (summed together and reproduced in the woofer channel)

will respond to balance adjustments in tandem with the left and right speaker channels. See page 16 for more information

concerning the balance control characteristics.

SDI Status LED

This bi-color (GREEN/RED) LED, labeled SDI, glows GREEN as long as a valid SDI digital datastream is being received.

It glows RED if TSR errors are present in the signal. If there is no SDI signal present the LED will be unlit. This LED

functions whether or not the SDI digital signal is selected for monitoring through the unit.