DMBK-R3008 DIO-24DIO-24 DMBK-R3008
DIO-24 Board (DMBK-R3008)
The DIO-24 Board (DMBK-R3008) is AES/EBU DigitalRS-422 Driver
Audio Interface board for I/O RACK OXF-IO3000 of. Transmit the AES/EBU (Balanced) format signal.
OXF-R3 (OXF-R3/24) system.. Convert from unbalanced signal to balanced signal.
The following describes the function of the each block of
DIO-24 Board (DMBK-R3008).Timing Generator :
. Make the timing pulse and required clock signal from
RS-422 ReceiverClock bus.
. Receive the AES/EBU signal and convert the unbalance(The original clock signals are transferred from I/O Link
signal.board (PIF-14 board).)
. This board has the 40 MHz Crystal Oscillator. This clock
Test Signal Selectoris used for Digital PLL of the DI block. Also, this clock
. This Selector is used to insert the test signal at systemis divided to 1/2 ( make 20MHz) that is used for system
test.clock of the Sampling Rate Converter.
. Normally, this selector selected the input signal.
CPU Controller
DI IC (CXD8278AQ). Interface between I/O Link Host CPU and AES/EBU
. Decode the digital audio signal from AES/EBU formatDIGITAL AUDIO Interface Block.
signal.. Decode the address bus and make the control signal for
. Decode the Sub-code information from AES/EBU signal.each block.
. Transfer the Sub-code information to CPU bus.. Make the control data from data bus.
Sampling Rate Converter (S.R.C.)
. Convert from 28 kHz through 54 kHz digital input signal
to convert the system clock rate signal.
. Convert from system clock rate signal (input) to 28 kHz
through 54 kHz signal (output) that are same frequency
rate of the Input side.
. SRC (Sampling Rate Converter) are mounted on all
Digital Inputs and all Digital Outputs, However, it is not
supported yet by software.
Format Converter for DI section.
. Convert from serial audio data to DI bus format (Parallel
Bus)
Format Converter for DO section
. Convert from the DO bus format (Parallel Bus) data to
serial audio data.
DO IC (CXD8277Q)
. Encode the digital audio signal to AES/EBU format
signal.
. Encode the Sub-code information to AES/EBU format
signal.
. Set the Sub-code information from CPU bus.
4-264-26OXF-R3
OXF-R3/24 |
ACEC
