User manual

AMP1-VS and AMP1-VSA User Manual P/N 821613, Rev-B Section 2: Operation

(Continued)

Please refer to Figure-2b on the facing page to familiarize yourself with the rear panel features of the AMP1-VS and AMP1-VSA

unit. The following sections describe these features and are referenced, by letter, to Figure-2b.

Rear Panel Features

Power Connector

Attach a standard IEC-320 power cord between this connector and mains power (100 - 250VAC, 50/60 Hz). The front panel

Power LED (Item 7, page 8) will glow GREEN to indicate operating voltages are present.

Analog Output (From SDI IN) Connectors (1-4)

These four 3-pin male Phoenix connectors output analog signals de-embedded from the SDI IN input connector (Item D) and are

configured for balanced low impedance connections. These connectors continuously output an analog signal converted from the

SDI inputs and are not affected by any selection settings. Connector pin-out information is silk-screened on the rear panel.

Digital Input Level Gain Calibration DIP Switch

Input Level Gain Calibration, the analog level which corresponds to a given digital input value, is settable via this DIP

switch. The factory setting is +4 dB (analog) = -20 dBFS (digital). See the silk-screened chart on the rear panel or the

diagram below for settings.

SDI Input and Output Connectors

The female BNC SDI IN connector receives industry standard SDI formatted signals and is configured for an unbalanced,

75 Ω connection. The unit de-embeds and monitors sub-group 1 (channels 1/2) and sub-group 2 (channels 3/4) of SDI

Group ID #1 (see page 17 for more information). Note that in the AMP1-VSA model, the SDI input is monitored only

when the Analog/Digital Source Select Switch (Item 5, page 8) is set to DIGITAL.

The female BNC SDI OUT loop-through connector outputs a reclocked (regenerated) copy of the signal entering the SDI

IN input connector and is configured for an unbalanced, 75 Ω connection.

Level Meter DIP Switch

This DIP switch sets the Line Level Calibration, Reference Level, and PPM/VU Display Mode for the level meter LED

bargraph displays on the front panel. See page 19 for for setting information.

Selected Analog Output Connectors (Right [A] and Left [B])

These two 3-pin male XLR connectors are analog outputs of the selected source(s) as assigned to the left and right

speakers. The left connector outputs the left channel (Channel A) and the right outputs the right channel (Channel B).

Both connectors are configured for low impedance connections and the output signals are not affected by the volume/

balance controls or headphone mute. For XLR pinout information see the diagram below.

Analog Input Connectors (CH. 1 - CH. 4)

These four 3-pin male Phoenix connectors, featured only on the AMP1-VSA model, accept standard analog audio signals

and are configured for balanced 200K Ω connections. Note that in the AMP1-VSA model, the Analog inputs are monitored

only when the Analog/Digital Source Select Switch (Item 5, page 8) is set to ANALOG.

High (+)

Low (-)

Gnd

(Shield)

Pin-1 Pin-2

Pin-3