Datasheet

DS3150
13 of 28
Figure 1-4. E3 Waveform Template
Table 1-G. E3 Waveform Test Parameters and Limits
PARAMETER SPECIFICATION
Rate
34.368Mbps (± 20ppm)
Line Code HDB3
Transmission Medium Coaxial cable (AT&T 734A or equivalent)
Test Measurement Point At the transmitter
Test Termination
75W (±1%) resistive
Pulse Amplitude 1.0V (nominal)
Pulse Shape
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
template shown in Figure 1-4
.
Ratio of the Amplitudes of Positive and Negative
Pulses at the Center of the Pulse Interval
0.95 to 1.05
Ratio of the Widths of Positive and Negative Pulses
at the Nominal Half Amplitude
0.95 to 1.05
0
-0.1
-0.2
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
Time (ns)
G.703
E3
Template
Output
Level (V)
29.1ns
24.5ns
12.1ns
8.65ns
17ns