User manual

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

Please refer to Figure-2a on the facing page to familiarize yourself with the front panel features of the AMP1-VS and AMP1-VSA units.

The following sections describe these features and are referenced, by number, to Figure-2a.

Front Panel Features

Section 2: Operation

(Continued)

Speakers

The AMP1-VS and AMP1-VSA feature two mid-range speakers (left and right) and two woofer speakers. 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 two

woofer (bass) speakers. Note that the woofer channel is NOT a dedicated LFE (subwoofer) or Center channel. See page

14 for more information concerning the AMP1 Series audio amplifier/speaker configuration.

Headphone Jack

This jack accepts a standard 1/4” phone type stereo plug. When you plug in headphones, the internal speakers will mute.

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.

Audio Level Meter LED Bargraph Displays (1-4)

Audio levels for the four source channels are displayed via these four tri-color LED bargraph meters. All bargraph LED

segments are of the tri-color type (green, amber, red) and the meters are user adjustable for Reference Level, Display

Mode, Peak Hold, PPM Ballistics, Alternate Bargraph Scales, and Phase Correlation via DIP switches on the rear

panel and inside the unit. For factory set and user adjustable level meter DIP switch settings, see pages 19 and 20. For

meter specifications, see page 5.

Analog/Digital Source Select Switch (-VSA Model Only)

This two position toggle switch selects between the two primary input sources of the AMP1-VSA model; ANALOG or

DIGITAL. When this toggle switch is set to ANALOG, the unit will monitor the source signals as input on the rear panel

ANALOG IN Phoenix connectors (Item G, page 10). When this toggle switch is set to DIGITAL, the unit will monitor the

SDI digital source signals as input on the rear panel SDI IN BNC connectors (Item D, page 12).

Volume Control Pot

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 in the speakers or headphones.

Power LED

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