Grass Valley 8920ADT - Manual (Page 7)

8920ADT Instruction Manual 1
8920ADT Analog Audio to
AES/EBU Converter with
Delay Tracking
Introduction
The 8920ADT converts analog audio to digital and applies a fixed and/or
auto-tracking delay to the digital audio. The right and left channel audio
inputs enter via a terminal block-to-BNC adapter on the rear panel. A delay
control input is provided for inserting an RS-232 level auto-tracking signal
from a frame synchronizer. An external reference of AES, 48 kHz Word
Clock, or 525/625 video is required to lock the module. The reference signal
is connected to loop-through input BNCs. The module outputs 2 AES/EBU
unbalanced 75
Ω
signals through BNCs on the rear panel.
The 8920ADT can modify the outgoing signal to provide channel swap-
ping, channel summing, tone and phase inversion. The remote control
capability supports mode selection, fixed and auto-tracking delay, and
input gain control (requires 8900NET module software version 2.1 or later).
The 8920ADT features:
■ 24-bit quantization,
■ Loop-through reference input accepts 48 kHz Word Clock, 525/625
Color Black, or AES3id signals,
■ 48 kHz sampling rate,
■ Terminal block input and output via adapters,
■ Independent input level control from +8 dBu to +28 dBu,
■ Fixed delay range in 2 ms steps,
■ Auto-tracking from a Grass Valley video frame sync device,
■ Remote control via ethernet frame interface, and
■ Remote control lockout via onboard jumper.