Artel DigiLink DLC170, Установка и эксплуатация

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DLC170 Function Modules Installation and Operations Manual 23
Understanding and Using the DLC170DA
• Electrical Video Output (page 23)
• Audio Output (page 23)
Signal Paths
Typically, the DLC170DA receives an optical SDI signal through an SFP that it then converts to an electrical SDI
signal. The DLC170DA then converts the digital video in the electrical SDI signal to analog video and makes it
available through the BNC connector on the back of the module. The DLC170DA also extracts the embedded
audio signals from the electrical SDI signal and converts them into four analog audio signals or two AES-3
stereo pairs.
The DLC170DA can also receive its input from another function module in the host chassis (for example, a
DLC274).
Optical Video Input and Output
The DLC170DA receives the optical SDI signal through an SFP installed in the SFP socket. Optical performance
is dependent on the selected SFP module, which must be specifically qualified by Artel to pass the video SDI
pathological patterns. The SFP modules use LC/PC connectors. Consult Artel for available SFP options.
The DLC170DA can repeat the received optical SDI signal and transmit the repeated signal through the SFP.
This feature provides a “drop-and-continue” capability.
Electrical Video Input
The DLC170DA can receive an electrical SDI signal from another function module in the host chassis through
the backplane. You select the video source using either the module switches or the element management
system (EMS) DL Manager (see the DL Manager Setup and Operations Manual ).
Electrical Video Output
The DLC170DA provides the following electrical video outputs:
• 75 Ohm BNC connector—Provides the converted analog video output. Located on the rear panel of
the module, this connector is also used for video output when you provision the DLC170DA to supply
a digital video output.
• Backplane connector—Provides a copy of the SDI electrical signal through the backplane for use by
other function modules in the host chassis.
• Monitor jack—Allows you to monitor either the DLC170DA analog output or the digital video input
using the front panel mini 75 Ohm SMB connector.
Audio Output
The DLC170DA provides audio output signals through a quad three-pin terminal block consisting of 12 pins.
This terminal provides four balanced audio signal outputs, each with a positive (+), negative (-), and ground
(G) connector. The four analog balanced audio outputs are organized as two stereo pairs; left & right channels.
You provision all of the DLC170DA audio output channels to be either analog or AES. When you provision the
DLC170DA to supply digital AES-3 audio, only two of the four outputs are used; stereo pair #1 is supplied to
channel A and AES stereo pair #2 is supplied to channel C.