Studio Technologies MODEL-85
AES/EBU Digital Audio Distribution Amp

MODEL-85

Digital distribution amplifier with two AES/EBU digital inputs and eight AES/EBU digital outputs. It allows AES/EBU signals to be distributed to multiple inputs (receivers) without incurring data transmissions errors.

Two AES/EBU Inputs
Each input provides transformer coupling and DC voltage blocking. Status indicators light whenever digital information is present on their respective input.

Eight AES/EBU Outputs
The Model 85 contains eight independent AES/EBU output sections. The rugged output circuits feature transformer coupling. For flexibility, each of the eight outputs can individually select input A or B as its source. This allows the Model 85 to act as a single 1x8 distribution amplifier (DA), or two fully independent DAs. Example configurations include creating a dual 1x4 DA, or a combination 1x3 DA and 1x5 DA.

Technical Background
The original AES/EBU specification (AES3-1985) called for a single transmitter to drive up to three receivers. In practice this proved to make data transmission susceptible to errors as an impedance mismatch can be created. The revised edition of the specification (AES3-1992) advises that a single transmitter should drive only a single receiver. The Model 85 addresses this requirement in a simple, reliable manner. Up to eight identical, but fully isolated, "copies" of the original signal are created.

No Data Manipulation
The Model 85 performs minimal processing to the AES/EBU digital audio data. The signal is received, converted to a standard logic signal, then retransmitted using rugged driver circuits. No timing "correction" is performed. No data is manipulated, added, or changed. The Model 85 assumes that your digital signals have been carefully created and simply need to be distributed to multiple inputs. In an age when everyone wants to "fix" your digital signals the Model 85 takes a "hands off" approach. With a nominal 60 nanosecond input to output delay, the outputs are essentially identical to the inputs.

Features:

• Transformer-coupled inputs and outputs
• Flexible configuration options
• Status indicator lights
• XLR-type connectors
• Single rack space mounting
• Rugged construction

Our Part #  MODEL-85