Rainbow Electronics DS3170 - Manual (Page 228)

DS3170 DS3/E3 Single-Chip Transceiver
228 of 233
Figure 17-10. DS3 Pulse Mask Template
Table 17-9. 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 75 W (±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 17-11 .
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