Albalá Ingenieros DAR3000C01, Manual, Page: 5 / 32

Albalá Ingenieros | Manual DAR3000C01
1. DESCRIPTION
1.1. The DAR3000C01
The DAR3000C01 module is a digital audio reference signal generator. It includes
composite video reference inputs, digital audio reference inputs and word-clock
references inputs and can synchronize to any of them. A temperature-compensated
quartz crystal oscillator (TCXO) is provided to generate the reference signal when no
external reference source is available.
The output signal uses the AES3 format and is provided on four outputs. In addition,
there are two BNC outputs that provide the word-clock.
Synchronization to the video signal is performed as per AES11.
The reference signal delivered at the output is normally set to silence, but it can also be a
tone with an amplitude of 0 dBfs, -18 dBfs or -20 dBfs. The tone frequency can be either
400Hz or 1kHz. In addition, periods of silence can be added to the tone signal in order to
create dips for identification of the audio channels.
The module accepts reference signals of three different types: PAL or NTSC video signals
(black burst), audio sampling frequency signals (word-clock) and AES/EBU digital audio
signals as per AES11. If no signal is available at any of the inputs, the module outputs a
signal with a user-selectable frequency of 32, 44.1, 48, 64, 88.2 or 96kHz, synthesized by
the TXCO oscillator whose long-term stability is Grade 1 (frequency error is less than
1ppm).
The front panel of the module contains LEDs that indicate the reference input selected
and the synchronization status at all times.
It is possible to monitor the DAR3000C01 status remotely using a communications
controller module installed in the same mounting frame. In addition, certain controller
modules provide SNMP management and the ability to record events in a file including
date and time information for further analysis.
The DAR3000C01 is a TL3000 terminal line module and can be housed in a three rack
unit (3 RU) UR3000 mounting frame or a 1 RU UR3100 mounting frame.
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