Somerdata R2D3-ASSY-0130, Установка и эксплуатация

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R
2
D
3
Data Capture Card
Installation and Operation 2-6
Data Handling
For card inputs, R2D3 accepts 2,048 kbits/s HDB3 signals
compatible with ITU specifications G.703 and G.704.
In telecommunications applications, these signals are referred
to as
framed and unframed . In DAB applications, these
signals are referred to as ETI-NI and ETI-NA .
The HDB3 encoded input signals are decoded, buffered and
made available to the user’s application software for transfer
over the PCI bus.
For card outputs, data streams transferred across the PCI bus
to the card are buffered, encoded into HDB3 signals and
output at 2,048 kbits/s, synchronised to either an internal or
external clock source.
Hardware Features
•
PCI card for PC platforms
•
PCI 2.1 or PCI-X compatible, depending on version (see
above)
•
16 Mbits on-board buffer
•
Real-time input and output data transfers
•
ITU-T G.703 (2,048 kbits/s) compatible data interface
•
Raw data transferred to/from PCI bus
•
E1 versions support framed (G.704) and unframed
(G.703) bitstreams
•
DAB version supports ETI-NI (G.703) and ETI-NA
(G.704) bitstreams, including simultaneous single-
stream input and single-stream output
(R2D3-ASSY-0131 from September 2003)
•
Selection of internal and external replay clock
synchronisation
•
75
Ω
/ 120
Ω
data interface (selectable on E1 cards)
•
40k
Ω
high-impedance input selection (on E1 cards)
•
Optional Splitter/Buffer for non-intrusive connections