AAV-DMUX
Rev. 1
2 Introduction
The AAV-DMUX card is an analogue audio de-embedder card for serial digital video
for four audio channels. It is one of the Flashlink series of modules, providing a
compact and cost effective solution for the transport of digital video and audio over
single mode optical fibre.
The card has a serial digital video input and a serial digital video output. There is an
optional optical input which will be used automatically if an optical signal is present.
When the optical option is present, the card switches automatically between the two
inputs looking for a valid signal. The first valid signal found will be used until lock is
lost, then the other input will be tried etc. This makes redundant fibre feeds easy to
implement with just an extra SDI-OE card.
The optical receiver is compatible with both single and multi-mode optical fibre and
may be used as a receiver in point to point, CWDM and DWDM configurations.
The analogue audio outputs can be configured for different output levels. The
maximum level can be set to levels b12 dBu and +24 dBu. All audio outputs
have independent outputs which are electronically balanced.
Figure 1 AAV-DMUX Block diagram
3 Specification
3.1 Measurement conditions
Sampling rate
48 kHz
Ambient temperature
25ºC
Measurement bandwidth
20 Hz-20 kHz
Detector
RMS
Input overload level (0 dBFS)
+18 dBu
4
Serialiser
Reclocker
deserialiser
Embedder
SDI
Audio1L
Audio1R
Audio2L
Audio2R
SDI
Optical
input
