User manual

AMP1-VS and AMP1-VSA User Manual P/N 821613, Rev-B

Section 2: Operation

(Continued)

Phase Indication LEDs

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 FAST indicate the

instantaneous phase relationships. 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.

Bargraph Brightness Trim Pot

This control is recessed into the front panel and can be accessed using a small screwdriver. Turning it clockwise will

increase the relative brightness of all bargraph display LED segments. Adjusting this one control will simultaneously

affect the brightness of all bargraph displays on the front panel.

SDI Signal Error Indication LEDs

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 always

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

Balance Control Pot

This adjusts the volume balance between the left and right speakers or headphones.

Front Panel Features