Aes Card; Introduction; Overview - Lexicon 960L Service Manual

960L Multi-Channel Digital Effects System Service Manual

AES card

Introduction

This section describes the theory of operation of the 960L AES card.

Overview

The 960L AES Card supports eight channels of AES digital audio I/O at 44.1KHz/48KHz and 88.2 KHz/96
kHz. The AES inputs are received using four Crystal CS8413 digital audio receivers and the outputs are
driven with four CS8403A digital audio transmitters. The receivers pass I2S audio to the AES FPGA, which
packs the eight samples into octal serial streams that interface to the Reverb Card via the I/O Bus. The
transmitters receive I2S audio from the FPGA. These I2S streams are unpacked from octal serial streams
that are sent from the Reverb Card. The FPGA contains control and status registers as do the AES devices,
which are accessed by the Reverb Card via the I/O Bus.
Figure 1-1 is a block diagram of the 960L AES card.
Figure 1-1 AES Card Block Diagram
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