User manual

ATSC/DVB-3/M User Manual P/N 821650 Rev-B

Section 2: Operation

Front Panel Features

Power Indication LED

This LED signals the operating condition of the power supply. The LED glows GREEN to indicate the unit is connected to

mains power and an operation voltage is present.

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 IN and OUT

indicate the instantaneous phase relationships. Indication is as follows:

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

• The small right LED (OUT) 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.

SDI Signal Status Indication LED

This LED will indicate the status of any SDI signal entering Source 2 regardless of any monitor selection settings. This LED

shows the following conditions:

• OFF: No valid HD/SD-SDI signal is present.

• GREEN: A valid HD/SD-SDI signal is present.

• RED: The HD/SD-SDI signal is not properly received.

Headphone Jack

Select the headphone audio sources as you would for the internal speakers. When you plug in headphones, the speakers will

mute. This jack accepts a standard 1/4” phone type stereo plug.

AC-3 and PCM Input Status Indication LEDs

These two green LEDs indicate which kind of signal is being received at the Source 1 inputs. When an AC-3 signal is being

monitored from Source 1 inputs, the left AC-3 LED will glow GREEN. When a PCM or standard AES/EBU signal is being

monitored from the Source 1 inputs, the right PCM LED will glow GREEN.

Pro-16 Selection 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.

Balance Control Pot

This control pans the volume balance between the left and right speakers.

SDI Subgroup Select Switch (1 or 2)

This 2-position toggle switch allows the operator to choose whether the unit will monitor Subgroup 1 (channels 1 and 2) or

Subgroup 2 (channels 3 and 4) of the chosen HD/SD-SDI Group (1, 2, 3, or 4) as selected by the SDI Group Select Switch (Item

8, page 8). Subgroup selection chooses the channels to be monitored from the selected SDI Group as follows:

Subgroup 1 = Channels 1 and 2 Subgroup 2 = Channels 3 and 4

Note that the Input Source Select Switch (Item 6) must be set to 2-SDI in order for the selected HD/SD-SDI signals to be actively

monitored.