Rear Panel Features - Wohler AMP2-VS User Manual

AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A
Please refer to Figure-2b on the facing page to familiarize yourself with the rear panel features of the AMP2-VS and AMP2-VSA
unit. The following sections describe these features and are referenced, by letter, to Figure-2b.
A
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 6, page 8) will glow GREEN to indicate operating voltages are present.
B
Analog Output (From SDI IN) Connectors (1-4)
These four 3-pin male Phoenix connectors output analog signals converted from the SDI IN input connector (Item D) and are
configured for balanced low impedance connections. These connectors output an analog signal only from the SDI inputs and are
not affected by any of the units selection settings. Connector pin-out information is silk-screened just above these connectors.
C
AES 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.
D
SDI Input and Output Connectors
The female BNC SDI IN connector is meant to receive 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. Note that in the AMP2-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.
E
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.
F
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.
Pin-2
High (+)
G
Analog Input Connectors (CH. 1 - CH. 4)
These four 3-pin female XLR connectors, featured only on the AMP2-VSA model, accept standard analog audio signals
and are configured for balanced 70K Ω connections. For XLR connector pin-out information, see the diagram under Item
F above. Note that the Analog inputs are monitored only when the Analog/Digital Source Select Switch (Item 5, page 8)
is set to ANALOG.
12

Rear Panel Features

Pin-1
Gnd
(Shield)
Pin-3
Low (-)
Female XLR Pinout
© 2004 Wohler Technologies Inc. ALL rights reserved
Pin-1
High (+)
Gnd
(Shield)
Pin-3
Low (-)
Male XLR Pinout
Section 2: Operation
Pin-2