Wohler AMP2-VSDA/AM User Manual Download Page 8

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AMP2-VSDA/AV

and

AMP2-VSDA/AM

User Manual P/N

821576

Rev-

Please refer to

Figure-2a

on the facing page to familiarize yourself with the front panel features of the

AMP2-VSDA/AV

and

AMP2-VSDA/AM

units. The following sections describe these features and are referenced, by number, to

Figure-2a

Front Panel Features

Section 2:

Operation

(Continued)

Speakers

The monitor features two mid-range speakers (left and right) and

one

woofer speaker. Two amplifier/driver combinations

handle midrange and high frequency information in the left and right (stereo) speaker channels, while the third channel
reproduces and sums the left and right channel information below the 500 Hz crossover point in the woofer (bass) speaker(s).
Note that the woofer channel is NOT a dedicated

LFE

(subwoofer) or

Center

channel. See page

for more information

concerning the

AMP2 Series

audio amplifier/speaker configuration.

Audio Level Meters - Mechanical

Audio levels for the left and right sources selected for monitoring are respectively displayed in the left and right mechanical
level meters. The

AMP2-VSDA/AV

model uses meters exhibiting

ballistic characteristics. The

AMP2-VSDA/AM

model uses meters exhibiting

PPM

ballistic characteristics. See page

for

Threshold Level

adjustment and settings for

the

and

PPM

type of meter.

Speaker Assign Channel Buttons (Left and Right)

Use the

left

bank of four buttons to assign one to four of the four available channels for monitoring from the

left

speaker

channel. Use the

right

bank of four buttons to assign one to four of the four available channels for monitoring from the

right

speaker channel. Channel buttons toggle On/Off and will light up BLUE to indicate they are selected.

Operation for channel selection for each bank of four buttons is as follows:

Single Channel Select:

Press and

release

a single channel button to select that channel (and

deselect

any previous

selection). Pressing and releasing the selected channel button

again

will deselect it.

Multi-Channel Select (Summing):

Press and

hold down

a desired channel button, then press other channel buttons to

add (sum) additional channels (or press any again to deselect). Release

all

buttons to accept the selection set. When

multiple channels are selected, pressing and

holding

an already selected channel button will allow further modification to

the selection set. Releasing

all

buttons accepts the new selection set. Pressing and immediately

releasing

an already

selected channel button will select only it and deselect all other channel selections. Note that if channels assigned to
either the left or right level meters are multi-channel (summed), then the respective level meter will indicate summed audio
levels.

If the user presses a previously selected (lighted) channel button, but then decides not to make any changes to the selection
set, the user should keep the button

depressed

for at least

1.5 seconds

before releasing it

This will preserve the current

selection set as though the button was never pushed.

Power LED

This LED glows GREEN to indicate the unit is connected to mains power and an operation voltage is present.

AES Status LEDs (AES 1 and AES 2)

These two bi-color GREEN/RED LEDs (

AES1

and

AES2

) indicate the input presence and status of the two

AES

input

signals. Either LED glows GREEN as long as a valid

AES/EBU

digital datastream for the associated input channel is

being received. Either LED glows RED to indicate errors in signal reception

data errors (if the data has been tagged

as inappropriate for conversion to analog by having the validity bit set). These LEDs function whether or not the

AES

digital signals are selected for monitoring through the unit.

Note: If you wish to disable

data

error indication (and leave only indication of signal

reception

errors) you can place

jumpers on

H14

and

H18

of the

919050

AES-to-Analog conversion PCB. See page

for component locations.

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.

Volume Control

This controls the loudness of the audio reproduced by the internal speakers or connected headphone. Clock-wise rotation
of this control increases the loudness of the monitored audio.

Analog/Digital Source Select Switch

This two position toggle switch allows the operator to choose between two primary input sources;

ANALOG

DIGITAL

When this toggle switch is set to

ANALOG

, the unit will monitor the signals as input on the rear panel

ANALOG IN

XLR connectors (

Item K

, page

). When this toggle switch is set to