Sony XDCAM PDW-HD1500, Руководство по обслуживанию

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9-4
PDW-HD1500/V1 (E)
2. Audio Signal Processing System
Recording System
Analog audio input
The analog audio signals input from the AUDIO INPUT connector (CN100, CN200/AU-311 board) are converted into the
serial digital audio signals (2-channel) in the audio A/D converter (IC108) on the AU-311 board, and then input into the
FPGA (hereafter called VAX: IC206) on the HPR-23 board.
Digital audio (AES/EBU) input
The serial digital audio signals (4-channel) input from the AES/EBU INPUT connector (CN1, CN2/VPR-99 board) are
level-converted by the line receiver (IC601/VPR-99 board), and then input into VAX on the HPR-23 board. After the serial
digital audio signals are decoded in VAX, they are processed as the AES/EBU input signals when extension menu 815 is
turned off.
On the other hand, when extension menu 815 is turned on, the signal processed by the sampling rate converter (IC1602,
IC1603/HPR-23 board) is selected in VAX and processed as the AES/EBU input signal.
SDSDI/HDSDI input
The digital audio signal included in the SD/HDSDI signal input from the HDSDI INPUT connector (CN500/RX-93 board)
is separated and extracted on the RX-93 board and then input into VAX via the CN100/VPR-99 board and the CN31/VPR-
99 board. The digital audio signal is separated and extracted in VAX in case of SDSDI input.
The above input signals input into VAX are selected with the AUDIO INPUT SEL button on the front panel for each
recording channel, multiplexed and sent to REC AUDIO DSP (IC1701, IC1702/HPR-23 board). The REC AUDIO DSP
(IC1701, IC1702/HPR-23 board) performs signal processing, such as delay processing, recording level control, and muting,
and then sends the signal back to VAX as the digital audio signal for recording. The returned data is multiplexed and sent
from VAX to PIER (IC2103/HPR-23 board) as the digital audio signal for recording to be written into the PIER SDRAM
(IC2302 to IC2305).
The proxy audio data for recording is compressed in the PROXY AUDIO DSP (IC2001, IC2002) based on the digital audio
signal for recording of the PIER SDRAM (IC2302 to IC 2305) to be written into the PIER SDRAM (IC2302 to IC 2305) as
the proxy audio data for recording.
FAM input
The record digital data input from the i.LINK connector (CN1) on the NET-4 board is sent from the connector (CN100) to
the connector (CN2) of the IF-1073 board on the HPR-23 board via the harness. Then, the record digital data is sent to the
FAM Accelerator (IC1201) on the HPR-23 board via iLINK PHY (IC1/IF-1073 board). After that, it is sent to PIER
through the PCI BUS to be written into PIER SDRAM (IC2302 to IC2305).
When recording to a disc, the PIER SDRAM data is sent to the disc drive block through the ATA66 interface (CN2101/
HPR-23 board).
Network input
The record digital data input from the network connector (CN2) on the NET-4 board is converted into the parallel data by
the Ethernet interface IC (IC1300). Then, being controlled by the LINUX CPU (IC1), the parallel data is sent to PIER via
the PCI bridge in the PHOT (IC801) on the HPR-23 board through the PCI BUS to be written into the PIER SDRAM.
When recording to a disc, the PIER SDRAM data is sent to the drive block through the ATA66 interface.