lxt384 Intel Corporation, lxt384 Datasheet - Page 122

• Manufacturer Part Number: lxt384
• Description: Octal T1/e1/j1 Short Haul Transceiver
• Manufacturer: Intel Corporation

Intel
13.0
122
Table 74. ITU G.703 2.048 Mbit/s Pulse Mask Specifications
Figure 31. E1, ITU G.703 Mask Template
®
LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
Note:
Mask Specifications
This chapter discusses the specifications for the mask into which the LXT384 Transceiver
transmitter output pulses must fit. The mask specification has two parts.
For information on pulse shaping, see
Test load impedance
Nominal peak voltage for a mark
Nominal peak voltage for a space
Nominal pulse width
Ratio (in terms of percentage) of the positive mark amplitude to the
negative mark amplitude, with both marks referenced to a space
•
•
Part 1
Part 2
V = 100%
50%
(Table
(Figure
0%
10%
10%
20%
Note: V corresponds to the nominal peak value.
20%
74) lists specifications on how the pulse relates to load resistance.
31) shows the border limits (the mask template) into which the pulse must fit.
10%
10%
Parameter
(244 – 25)
(244 + 244)
(244 + 25)
(244 – 50)
20%
194 ns
219 ns
269 ns
244 ns
488 ns
Section 6.4.2, “Transmitter Pulse
10%
10%
Nominal pulse
Pair Cable
0 ± 0.300
95 to 105
Twisted-
3.00
120
244
Revision Date: September 22, 2005
Shaping”.
Document Number: 248994
0 ± 0.237
95 to 105
Coaxial
Revision Number: 004
Cable
2.37
244
75
Ratio
Unit
in %
ns
Ω
V
V