XRT82D20 Datasheet, PDF (15/27 Pages) Exar Corporation – SINGLE CHANNEL E1 LINE INTERFACE UNIT

XRT82D20 SINGLE CHANNEL LINE INTERFACE UNIT
áç
REV. 1.0.7
the ITU-T G.703 Pulse Template Requirements for E1
Applications.
An illustration of the ITU-T G.703 Pulse Template Re-
quirements is presented below in Figure 9.
With input signal as described above, the XRT82D20
will take each mark (which is provided to it via the
Transmit Input Interface block, and will generate a
pulse that complies with the pulse template, present-
ed in Figure 9 (when measured on the secondary
side of the Transmit Output Transformer).
FIGURE 9. ILLUSTRATION OF THE ITU-T G.703 PULSE TEMPLATE FOR E1 APPLICATION
269 ns
(244 + 25)
V = 100%
194 ns
(244 – 50)
Nominal pulse
50%
0%
244 ns
219 ns
(244 – 25)
488 ns
(244 + 244)
Note – V corresponds to the nominal peak value.
13