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8921ADT Instruction Manual 7

8921ADT 4-Channel Audio

A-D Converter with Delay

Introduction

The 8921ADT module offers four independent, audio A-D conversions on

a single module. Four channels of analog audio are converted to two digital

audio streams. Two forms of delay are provided—a ﬁxed delay and a vari-

able delay based on a signal from a video decoder with a frame synchro-

nizer or from a frame sync card.

The 8921ADT features:

• 24-bit ADC A-to-D conversion,

• >105 dB A weighted signal-to-noise ratio,

• The four channels of audio analog to digital conversion has indepen-

dent controls for:

•Channel pairing,

• Level adjustment,

•Output swapping, summation, phase inversion,

•Delay up to 5 seconds for each channel or channel pair, and

• 400 Hz, 1 k Hz, and 1 kHz channel ID test tones.

•Auto-tracking delay of video frame synchronizers (8900FSS and

8981FS),

• Four inputs, two pairs of balanced High Z analog audio inputs,

• Looping reference input supports NTSC/PAL analog color black,

48 kHz AES Word Clock, and 48 kHz AES3-id DARS.

•Optional 8900-A-CBL package of four breakout cables, to convert 3-pin

balanced AES audio to dual 75

Ω

BNCs, unbalanced AES audio, and

•Remote control and SNMP alarms with the 8900NET module.

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