Albalá Ingenieros, S.A. IMB2000C01, Manual

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Albalá Ingenieros | Manual IMB2000C01
4.2.3. AES67 receiver
The AES67 receiver can receive up to 16 streams of a maximum of eight channels
each. The parameters that can be configured for each stream are similar to those of
the transmitter, but also include the buffer size used for each stream. In order to
simplify the configuration process and avoid errors, the IMB2000C01 provides a series
of discovery protocols that allow automatic configuration of each receiver via SAP,
DNS-SD or NMOS.
The 128 audio channels accepted by the receiver are routed to the interconnection
matrix.
4.2.4. AUDIOFLEX bus matrix
The AUDIOFLEX bus is formed by two lines, M2S (Master to Slave) and S2M (Slave to
Master), that interconnect all the slots of the UR2000 mounting frame. Each of the
two lines can multiplex up to 64 audio channels sampled at 24 bits and 48kHz.
The 64 audio channels from each line of the AUDIOFLEX bus are grouped into eight
time slots, each of which contains eight audio channels. The insertion or extraction of
the eight audio channels contained in a slot on the bus are always performed by the
same module.
In order to correctly identify all of the different time slots, there must always be a
module installed in the UR2000 frame that acts as the bus master. This is normally
the IMB2000C01, which inserts a header aligned in the M2S line and a reference
signal onto the internal 13.5MHz synchronization bus.
When the IMB2000C01 is installed in a mounting frame, it always acts as the bus
master. In addition to generating the header and the reference signal, it inserts audio
into the eight time slots of the M2S line in order to send it to other modules in the
chassis and to permit extraction of the audio that other modules in the frame have
inserted onto the S2M line.
The TL2000 family modules that have an interface with the AUDIOFLEX bus but do
not generate the alignment header as designated as slaves. These can be divided into
two groups, depending upon their functions: the inserters take audio from external
sources and send it to the S2M line of the bus, whereas the extractors take audio
present in the M2S line of the bus in order to deliver that audio to other devices.
The following modules are capable of inserting audio into the S2M line of the bus:
- ADB2008C01: inserts eight channels of analog audio into a time slot.
- DDB2008C01: inserts eight pairs of AES/EBU digital audio synchronized to the
audio on the bus into two time slots.
- DEB2008C01: inserts eight pairs of AES/EBU digital audio that may or may not be
synchronized to the audio in the bus into two time slots.
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