Wohler ATSC/DVB-3/SDI Manuel d'utilisateur télécharger pdf (Page 10)

ATSC/DVB-3/SDI User Manual P/N 821557 Rev-A

Please refer to Figure-2a on the following page to familiarize yourself with the front panel features of the ATSC/DVB-3/SDI unit.

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

Front Panel Features

Section 2: Operation

Speakers (Left/Middle/Right)

The ATSC/DVB-SDI internal speaker system is comprised of two mid-range tweeter speakers (left and right) and one

woofer speaker (middle). The two side channel speakers reproduce, in stereo, only the mid and high frequencies. Please note

that the woofer speaker (middle) is not a dedicated Center nor LFE speaker.

Speaker Select Switches (Left and Right)

Use the left switch to select any one of six selected channels for monitoring from the left speaker. Use the right switch to

select any one of six selected channels for monitoring from the right speaker.

Note: These two switches are only functional when the All/Selected Switch (Item 7) is in the SELECTED position. These

two switches are NOT functional when the All/Selected Switch is in the ALL position.

Speaker Select Disabled Indication LEDs (Left and Right)

When the All/Selected Switch (Item 7) is in the ALL position (thus disabling the Speaker Monitor Select Switches) both

of these LEDs will glow RED.

Audio Level Meter LED Bargraph Displays (1-6)

Audio levels for source channels 1 through 6 are displayed via these six high-resolution 53-segment LED bargraph display

level meters (three on the left side of the front panel; three on the right side). Dynamic range for these meters is 65 dB and

they are able to display signal levels using both PPM and VU standards. An adjustable-duration hold of peak PPM value may

also be displayed. Each meter is labeled according to the standard Surround Sound nomenclature (left front, right front, center,

low frequency effects, left surround, and right surround). See page 20 for more information about these level meters.

Bargraph Brightness Trim Pot (Left and Right)

These two trim pots are recessed into the front panel and can be accessed using a small screwdriver. Turning either trim pot

clockwise will increase the relative brightness of the associated bargraph display LED segments. The left trimpot affects the left

three bargraph displays (1-3); the right trim pot affects the right three bargraph displays (4-6).

Input Source Select Switch

This 2-position toggle switch allows the operator to choose between two possible input sources (1-AES or 2-SDI) for

monitoring through the unit. Choosing 1-AES selects the AC-3 or PCM/AES signals entering the Source 1 connectors on

the rear panel (See Items C and D, page 14). Choosing 2-SDI selects an AC-3 or PCM/AES source that is de-embedded

from the SDI signal entering the Source 2 connector on the rear panel (see Item F, page 14).

All/Selected Switch

When this 2-position toggle switch in in the ALL position, a stereo mixdown of the five full channels is applied to the speaker

amps (the LFE channel is excluded). In this posiotion both the left and right Speaker Select Switches (Item 2) are disabled

and the Speaker Select Disabled Indication LEDs (Item 3) will glow RED.

When this switch is in the SELECTED position, channel selection defaults to the settings as selected by the left and right

Speaker Select Switches (Item 2) and the left and right Speaker Select Disabled Indication LEDs (Item 3) will be unlit.

SDI Group Select Switch (1, 2, 3, or 4)

This 4-position rotary switch allows the operator to choose SDI GROUP 1, 2, 3, or 4 for monitoring. The Su/jointfilesconvert/320471/bgroup (1 or 2)

of each SDI GROUP is selected using the SDI Su/jointfilesconvert/320471/bgroup Select Switch (Item 17, page 12).

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

monitored.

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.

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