BDI AES-403 Panduan Referensi Teknis - Halaman 3

Jelajahi secara online atau unduh pdf Panduan Referensi Teknis untuk Beralih BDI AES-403. BDI AES-403 10 halaman. Multi switcher digital/analog input audio switcher/da/digital to analog converter

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Introduction

The AES-403 Multi Switcher Audio System comprises of a two input AES compatible switcher

where Input B can be pre configured for analog input, dual output digital audio DA and digital to

analog converter. The unit also has status and diagnostic error indicators for troubleshooting. The

AES-403 is intended for use at unattended transmitter sites or for virtually any digital/and or

analog switching, distribution and/or D/A conversion application. The unit has the capability to

automatically switch inputs upon detection of loss of clock, digital error flags and/or silence sense.

In addition to these features, the unit can function as an interface standards converter. As

shipped from the factory the unit is supplied with XLR balanced connectors. For unbalanced use

such as the 75 ohm unbalanced AES standard for digital audio transmission transformer adapters

are available from Broadcast Devices, Inc. for conversion of the AES-403 I/O to unbalanced 75

ohm operation.

Unpacking

Carefully inspect the unit after unpacking and make certain that no damage has occurred during

shipping. If damage is noted, contact the shipper immediately and file a claim for damages. Each

unit is carefully packed and carries full insurance against damage. Inspect the packing list and

make sure that the contents of the package match those described on the packing list.

II.

Installation and Connections

Select a space in suitable E.I.A. standard rack to locate the unit. Determine the local electrical

power supply voltage. As supplied from the factory, your AES-403 is setup for 100 – 240 V.A.C.

50 - 60 Hz. No external adjustment for local power standards is necessary if power available

conforms to the above rating. The AES-402 utilizes a switch mode power supply and

automatically adjusts for local power entry. Make connections to the unit following good

engineering practice. Supply power to the unit utilizing a three pronged grounded outlet. Do no lift

the electrical ground to the unit at the power receptacle as this will result in a safety hazard. In the

event of ground loops, lift the ground at the offending connection only. Make certain that the unit

is afforded proper ventilation in the area of the top cover vent.

A. Digital Interface

The AES-403 inputs are balanced XLR connections conforming to the AES standard. Each XLR

connection is terminated at 110 ohms as per the standard. The balanced digital outputs are also

XLR connections which provide 110-ohm transformer coupled source impedance as per the AES

standard. To unbalance any input or output unbalanced termination adapters can be purchased

from Broadcast Devices, Inc. Order P/N 75 – XLRM for inputs and P/N 75-XLRF for output

connections. All BDI adapters utilize BNC female interface for application to 75 ohm BNC

connectorized cabling.

B. Analog Interface

There is provided on the rear of the unit a left/right balanced analog input and output. This output

is suitable for driving 600-ohm balanced lines and is short circuit protected. The analog input is

designed to accept balanced +4 dBm level and provides a bridging input. A headphone jack and

volume control buttons are provided on the front panel of the unit for confidence monitoring of the

incoming feed. XLR balanced outputs conform to + 4 dBm output referenced to – 20 dBFS digital

output.