Simplifying Video Transport
FEATURES
Single card SDI to composite video and analog audio
conversion with optical receiver/repeater
Convert SDI (SMPTE 259M) to composite video
• NTSC or PAL
• Analog composite 75ohm video output BNC
• 10-bit component digital 525/625 line to NTSC-M or PAL-
B/G conversion
• Composite 12-bit processing
Convert SDI to analog or AES audio
• SMPTE 272M-ABC audio de-embedding with 24-bit audio
conversion
• Balanced analog audio outputs (4)
• Balanced AES audio outputs (2)
Optical transport of:
• Analog video and audio
• 1.485Gb/s HD-SDI (SMPTE 292M)
• 270Mb/s
• SD-SDI (SMPTE 259M-C, ITU 656)
• SDTI (SMPTE 305M)
• DVB-ASI
• Artel 270
Optical to optical repeater
Externally accessible SFP transceiver optics
• Optical budget to 33dB
• WDM (1310nm, 1550nm)
• CWDM ITU G.694.2 (Channels 27-61)
Interoperation with
• Other DigiLink modules
• DigiLink 1220 /2701
• Other non-scrambled or non-dithered SDI optical transmitters
and receivers
Multiple monitoring options
• Front panel monitor (mini 75ohm SMB) selectable between:
• NTSC or PAL (post-conversion)
• SDI (pre-conversion)
• Front and rear panel status LEDs
Remote management via DigiLink Manager
• No external software required
• HTTP or SNMPv2
• Monitor
• Configure
• Upgrade firmware
18
SDI to Composite Video (NTSC/PAL) Analog Audio Conversion
with Optical Receiver/Repeater [DLC170DA]
DigiLink Video Transport System
The DLC170DA converts optically received SDI to composite analog
video (NTSC or PAL) and analog or AES audio. Used with the DLC170AD,
the design insures full TV-1 RS250-C “short haul” analog performance
over a true SMPTE 259M SD-SDI optical transport link. Additionally,
it can be used as an optical receiver for all digital signals from 19.39
ATSC to 1.485Gb/s HD-SDI making the DLC170DA ideal for the eventual
conversion from analog to digital video transport.
The innovative module uses advanced video and audio processing for exceptional quality
conversion of SDI (SMPTE 259M) to composite video and analog audio. It accepts a
270Mb/s 525/625 line SDI input from either the optical SFP receiver or the backplane, then
converts it to composite analog and audio signals.
The received optical signal can be directed to the backplane for additional channel
groups to be processed by other cards in the DigiLink 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.
A front panel video monitor with analog or digital selector switch allows the incoming
digital (with embedded audio) or composite analog output to be monitored using conventional digital/analog video equipment.
DLC170DA SDI to NTSC/PAL and Analog Audio
Audio CH 1
Audio CH 2
Audio CH 3
Audio CH 4
AES Decode
Audio
De-Embed
SDI to
NTSC/PAL
Internal
SFP
Input
Select
Format
Classifiction
AES Decode
HD ASI SDI
Output
Select
Video Out
Front Mini SMB
Internal