GRASS VALLEY Python 3G, Руководство пользователя

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Python 3G
User Guide
• 270 Mb/s DVB/ASI (re-clocked)
• 19.4 Mb/s ATSC: SMPTE 310M
• Non-standard digital signals to 3 Gb/s
The unit is interoperable with industry standard optical HD/SDI signals to/from other
equipment, such as Rattler™, Diamondback™, SHED™, HDX™, and Viper™ series frames and
modules, as well as other manufacturers' routers, DAs, etc.
The Python 3G has four Input/Output card positions that can either convert incoming
SDI/Data BNC signals into Fiber Optic signals or can detect received Fiber Optic signals and
convert them to SDI/Data. Each position handles four channels
In the above example the two card positions A-1 and A-2 are transmitter cards. Slot A-1
handles 1310 nm low range signals and slot A-2 handles 1310 nm high range signals.
Please see
Understanding Python 3G Model Numbers on page 43 for a list of all of the
available I/O cards.
Positions A-3 and A-4 each have a four channel detector card that converts the incoming
de-multiplexed fiber optic feed into individual SDI/Data signals.
The eight input signals are multiplexed ( B ) and sent to the CWDM Band Coupling I/O card
( D ). This I/O card manages on a single ST Fiber Connector the eight outgoing and eight
incoming Fiber Optic signals. 16 signals are coupled on to a single Fiber I/O. The band
coupler combines 1310 nm and 1550 nm ranges into a single Fiber Optic signal.
The incoming eight Fiber signals are decoupled, de-multiplexed ( C ) and sent to the
Detector cards for conversion to SDI/Data.
Fiber Cable Overview
Fiber Optics and Fiber Optic Cable are the core technologies at the heart of the Python 3G
System. The Python 3G features the ability to multiplex and de-multiplex a variety of video,
audio, and data signals so that they can be carried over a thin strand of Fiber Optic cable for
long distances. The specific theory and operation of Fiber Optics is beyond the scope of
this document.
Fig. 1-2: Single Mode Fiber Optic Cable Cross-Section (Illustrative Only)