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AAC-3390  AES/EBU A to D Converter

 
Features
  • Balanced stereo inputs.
  • High impedance or 600 Ohm input termination.
  • AES external reference input.
  • Balanced 110 Ohm or unbalanced 75 Ohm AES output rear assembly options.
  • Front panel AES monitoring point.
 

General

 

The IRT AAC-3390 is an analogue audio to AES/EBU digital audio signal converter, and converts standard stereo analogue audio signals to the AES3-1992 and SMPTE-276 AES digital audio standard.
The input signals are a stereo pair of balanced audio at the standard +4 dBu line up level.
The outputs are three serial digital audio signals; one unbalanced BNC connection on the front panel for monitoring and two from the rear panel assembly. The latter can be 110 Ohms balanced using the ZAC- 3391 rear panel assembly or 75 Ohms unbalanced BNC connections using the ZAC-3390 rear panel assembly.
A further input is provided for a reference AES input signal to lock the signal from the AAC-3390 to a station reference.

The reference input can be either 110 Ohms terminating balanced line or 75 Ohms terminating unbalanced line. Both connections are provided on the rear panel assembly. Selection of the input type is by links on the AAC-3390 main circuit board.
 

Front panel LED indicators are provided for DC voltage, presence of input audio levels above -30 dBu, lock to external AES reference and overflow at 0 dBFS corresponding to the +24dBu full scale input audio level.
The AAC-3390 is designed to fit the IRT range of Eurocard mounting frames, including the 12 or 10 slot 3 RU and 2 slot 1 RU rack mounting frames

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DVC-4360  Composite to 270 Mb/s SDI

Features

  • Broadcast quality, full 12-bit video conversion.
  • 2 SDI 270 Mbit/s outputs.
  • 2 AES or 4 Analogue Audio Inputs.
  • PAL or NTSC operation with auto switching.
  • Video input indicator on front panel.
  • Standard IRT Eurocard format may be mixed with other IRT analogue and digital Eurocards in the same frame.

General

The DVC-4360 is a high performance PAL / NTSC composite to 270 Mbit/s serial digital (SDI) video converter, complete with analogue or AES audio insertion.
The DVC-4360 provides two SDI outputs.
Audio channel allocation and source selection is provided by links on the main board.
The DVC-4360 is designed to provide a broadcast quality composite to SDI conversion using the latest digital filtering techniques.
The composite input section, shown in the block diagram above, automatically detects the composite input standard (PAL or NTSC) and generates the appropriate 625 or 525 SDI format.

Link settings are provided for default output on signal loss. This is either blue or black in 625 or 525.
Full 12 bit video processing and 20-bit analogue to digital audio converters are used in order to assure a high quality SDI signals suitable for broadcast and production monitoring applications.
The DVC-4360 is designed to fit IRT's standard Eurocard frames as well as IRT's 4000 series frame for use with IRT's SNMP system and may be used alongside any other of IRT's analogue or digital Eurocards

 

 

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