Nevion AVA-MUX - Manual (Page 4)

AVA-MUX Rev. C
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1 Product overview
The AVA-MUX unit actually consists of three modules:
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The AVA-MUX-C2 connector backplane.
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The AAV-SD-XMUX(-T) AES and Analog Audio Embedder (with optical transmitter).
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The ADC-SDI composite decoder to SDI converter.
1.1 AVA-MUX-C2
The AVA-MUX backplane has all the necessary connections for the audio and video signals.
It also has all of the inter-connections between the two processing cards. There are passive
loop-through connectors for the analog video inputs. Termination of the analog video inputs
is also configurable on the back panel.
1.2 AAV-SD-XMUX(-T)
The AAV-SD-XMUX is a highly integrated audio embedding module in the Flashlink range,
offering simultaneous embedding and de-embedding of audio from an SD serial video signal.
In the AVA-MUX application, the AAV-SD-XMUX can:
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De-embed and embed all groups of audio.
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Copy or move audio groups without additional delay.
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De-embed 2 AES3 digital audio and non-audio signals.
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Embed 2 AES3 digital audio and non-audio signals.
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Embed 4 analog audio signals.
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Apply sample rate converters when needed on the AES3 inputs.
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Apply extra audio delay.
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Swap stereo channels.
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Make mono or sum from stereo signals.
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Have optical laser output.
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Transport asynchronous serial data.
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Generate video and audio signals.
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De-glitch correctly synchronized switched video.
The card has a serial digital video input and a serial digital video output. There is an optional
optical output with a choice of lasers that may be applied in point to point and CWDM
configurations.
1.3 ADC-SDI
The ADC-SDI is a high-quality 10-bit composite to digital video converter. The converter has
two inputs which it can use as two CVBS or one S-video inputs. The input mode can either
be locked or the card will scan the inputs and all formats until it finds a valid signal. The
ADC-SDI can be configured with switches on the unit, or via the GYDA control interface. The
ADC-SDI can generate a white pulse to mark field one of an 8-field-PAL/4-field-NTSC signal.
An intelligent composite encoder/ digital to analog converter (like the DAC-SDI) will encode
to the correct field (8-field-PAL/4-field-NTSC). This will reduce artifacts due to composite
decoding and re-encoding.