Sierra Video EMD-218 - Manual (Page 6)

Page 6 of 29 EMD-218 Owner’s Manual
• (V 2.2)
Introduction
In This Chapter
This chapter includes the following sections:
• A Word of Thanks
• Overview
• Functional Block Diagram
• Features
• Documentation Terms
A Word of Thanks
Congratulations on choosing the openGear EMD-218 HD/SD Audio Embedder/De-embedder. The
EMD-218 is part of a full line of modular conversion gear for broadcast TV environments. The Sierra
Video Systems openGear line includes video decoders and encoders, audio embedders and de-
embedders, distribution amplifiers, format converters, and much more. Sierra openGear modular
conversion gear will meet your signal conversion needs now and well into the future.
Should you have questions pertaining to the installation or operation of your EMD-218, please contact
us at the numbers listed on the back cover of this manual. We are happy to help with any questions
regarding this or any other openGear card.
Overview
The EMD-218 is a high quality audio embedder/de-embedder capable of embedding audio signals into
HD or SD SDI signals, and de-embedding audio data from those signals. It also gives as outputs, two
re-clocked copies of the input.
The EMD-218 can best be thought of as an audio router on a card. On the input side of the router are
the up to 16 channels of embedded AES in the input video, the up to16 channels (8 pairs) of discrete
AES input, up to 8 channels of differential analog audio input, and up to 10 channels (8 signals plus
mixdown) of decoded Dolby signals (with Dolby Decoder option). On the output side are the up to 16
channels of embedded AES audio, and the up to 16 channels (8 pairs) of discrete AES output. The
router acts as a full audio cross point: each of the 32 output channels (16 embedded AES, 16 discrete
AES) can receive signal from any one of the 52 (16 embedded AES, 16 discrete AES, 8 Analog, 10
Dolby decoded) input channels. Each output also allows gain adjustment and optional polarity
inversion.