XRT5894 Datasheet, PDF (13/19 Pages) Exar Corporation – Four-Channel E1 Line Interface (3.3V or 5.0V)

XRT5894
Transmitter Output Pulse Measurement
Figure 5 shows a typical transmit pulse plotted on the template shown in ITU G.703 Figure 15/G.703. The following
conditions apply:
V_CC=3.30V
Transmitter output transformer secondary terminated with 120W
All ones signal
Receiver output looped backed into transmitter digital input
Operation without transmitter clock (RZ data)
Measurement made with a Tektronix TDS640 digital scope set to full bandwidth
1.2
1.0
0.8
0.6
0.4
0.2
0
-0.2
-244
-122
0
122
244
Time (ns)
Figure 5. XRT5894 Output Pulse
Rev. 1.10
13