Artel DigiLink DLC170, Установка и эксплуатация

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DLC170 Function Modules Installation and Operations Manual 21
Understanding and Using the DLC170DA
Understanding and Using the DLC170DA
The DLC170DA module uses advanced video and audio processing for exceptionally high quality conversion
of SD-SDI (SMPTE 259M) to composite video and analog audio. It accepts a 270 Mb/s 525/625 line SDI input
from either the optical SFP receiver or the backplane and then converts the SDI input to composite analog
video and analog audio signals. You can also provision the DLC170DA to supply the electrical version of the
received digital video signal in place of the composite analog video. In this application, the DLC170DA can
convert both SDI and DVB-ASI from optical to electrical (conversion to analog video can only be accomplished
with an SDI input). The DLC170DA can also be provisioned to supply AES-3 digital audio in place of the analog
audio.
The DLC170DA provides its received optical signal to the host chassis backplane for additional channel groups
to be processed by other cards in the chassis. Audio embedded per SMPTE 272M levels A, B, and C can be
extracted as either four balanced analog audio channels or two stereo AES digital audio streams.
The DLC170DA front panel monitor jack can output either analog or digital video. When set to digital, you can
check the received video that is in 270 Mb/s SDI format with embedded audio using digital video test
equipment. Setting the monitor jack to output analog video enables you to use conventional analog video
equipment to check the converted analog video for signal level and quality.
The DLC170DA features include the following:
• Single card optical SDI conversion to composite video and analog audio (optical-to-electrical) with
optical re-transmission (optical-to-optical repeater)
• Convert SD-SDI (SMPTE 259M) to composite video:
– NTSC/PAL (based on SDI content)
– Analog composite 75 Ohm video output BNC
– 10-bit component digital 525/625 line to NTSC-M or PAL-B/G conversion
– Composite 12-bit processing converts SDI component video to analog composite video
• Convert SDI to analog or AES-3 audio:
– SMPTE 272M-ABC audio de-embedding with 20- or 24-bit audio conversion
– Balanced analog audio outputs (4)
– Balanced AES audio outputs (2)
• Multiple output options as follows:
– Composite video or SDI (electrical)
– Optical repeat of received SDI (drop and continue)
• Use with DLC170AD for optical transport of analog video and audio (exceeds TV-1 and ANSI T1.502
short haul specifications)
• Optical transport using industry-standard optics as follows:
– WDM (1310 nm, 1550 nm)
– CWDM
– DWDM per ITU G694.1 channels 21-60