Manual

DS3150
9 of 22
Figure 1D. E3 TRANSMIT WAVEFORM TEMPLATE
Table 1G. E3 TRANSMIT WAVEFORM TEST PARAMETERS AND LIMITS
PARAMETER SPECIFICATION
Rate
34.368Mbit/s (± 20ppm)
Line Code HDB3
Transmission Medium Coax cable (AT&T 734A or equivalent)
Test Measurement Point At the transmitter
Test Termination
75Ω (± 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 1D
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
29.1ns
24.5ns
12.1ns
8.65ns
17ns
Output Level (V)