XR-T7296 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XR-T7296' PDF : 16 Pages View PDF
XR-T7296
E3 SIGNAL REQUIREMENTS
The T7296 is designed to transmit pulses that conform to
CCITT recommendation G.703. Figure 6 shows the E3
pulse mask requirement recommended in G.703, and
Table 6 shows the pulse specifications.
V
0.2
0.1
1.0
0.1 0.2
17ns
(14.55 + 2.45)
8.65ns
(14.55 - 5.90)
Nominal pulse
14.55ns
0.5
12.1ns
(14.55 - 2.45)
0.1
0
0.1
24.5ns
(14.55 + 9.95)
0.1
0.1
0.2
29.1ns
(14.55 + 14.55)
CCITT-32581
Figure 6. CCITT G.703 Pulse Mark at the 34,368-kbit/s Interface
Parameter
Pulse Shape (Nominally Rectangular)
Pair(s) In Each Direction
Test Load Impedance
Nominal Peak Voltage of a Mark (Pulse)
Peak Voltage of a Space (No Pulse)
Nominal Pulse Width
Ratio of the Amplitudes of Positive and Negative Pulses at the Center of a Pulse
Interval
Ratio of the Widths of Positive and Negative Pulses at the Nominal Half Amplitude
Table 6. E3 Pulse Specifications
Value
All marks of a valid signal must con-
form with the mask (see Figure 6),
irrespective of the sign
One coaxial pair
75Ω resistive
1.0V
0V $ 0.1V
14.55ns
0.95 to 1.05
0.95 to 1.05
Rev. 2.01
10
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