3.24. BC2220 and BC2221. DSP board. Processing, routing and VU meters
management.
General description.
This board takes the data from the TDM IN bus, processes them and sends them to the
appropriate TDM OUT bus, depending on the function assigned to the board. There are three
types of functions that are internally assigned to DSP boards:
a) Router: Manages a certain number of inputs and outputs, making crosspoints and
modifying gains.
b) Processor: Performs signal processing tasks.
c) VU meters: Performs VU meter control tasks.
As many as 20 of these boards can be installed per rack. Depending on the capacities your
installation requires, you will need a certain number of BC2220/BC2221 processing boards.
The main difference between BC2220 and BC2221 boards is that the last ones have a higher
process rate, so the number of DSP boards required for a certain configuration, with a certain
request of routing, processing and VU meters management, will be notably lower when you use
BC2221 boards.
These boards are inserted into the front part of the BC2000DF rack, in the area protected by
the front cover.
Panel description.
Green LEDs: indicate the communications status of this
board within the rack.
Red LED: indicates that the board is in the start-up
process. The LED should remain off during normal
operation.
Module removal handles: the board has two red module
removal handles that will enable you easily to pull the board
out of its slot in case of failure. Before the board is inserted,
these handles must be retracted.
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