R
2
D
3
Data Capture Card
Installation and Operation
3-2
Signal Interface
The signal Interface supports HDB3 encoded 2,048 kbits/s
signals in accordance with ITU-T Recommendation G.703.
G.703 Recommendation
Pulse shape
(nominally rectangular)
All marks of a valid signal must conform
to the mask irrespective of the sign.
The value V corresponds to the nominal
peak value.
Pair in each direction
One
coaxial pair
One symmetrical
pair
Load impedance
75 Ohms
120 Ohms
Nominal peak voltage of a mark
(pulse)
2.37V 3V
Peak voltage of a space
(no pulse)
0 ± 0.237V
0 ± 0.3V
Nominal pulse width
244ns
Ratio of the amplitudes of
positive and negative at the
centre of the pulse interval
0.95 to 1.05
Ratio of the widths of positive
and negative pulses at the
normal pulse amplitude
0.95 to 1.05
Содержание R2D3-ASSY-0130
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