Hdsl Signal Cable Loss - ADC 2 User Manual

Appendix A - Functional Description
Table 8 on page 26
various cable gauges at 196 kHz and 135 . It applies to the HDSL cable pairs
between the COT and the HDU, and between the HDU and the RT.
To achieve optimum performance, make the electrical length (196 kHz loss)
of all HDU spans as close to equal as possible. This results in the highest
operating loop margins. If it is not possible to make all spans equal, choose
span lengths that reduce the total power consumption of the CPT that powers
the HDU. Do this by minimizing the length of Span 1 and Span 2. Use
on page 26 when you calculate the electrical length of each span.
The HDU-409 has a range of up to 35 dB loss at 196 kHz on each of the four
HDSL loops. A list of HDSL signal cable losses for various cable gauges at
196 kHz and 135 is provided in
cable pairs running between the HLU and the HDU-409 and between the
HDU-409 and another HDU or HRU.
Cable Gauge
26 AWG/0.4 mm
24 AWG/0.51 mm
22 AWG/0.61 mm
19 AWG/0.91 mm
(a) Add 3 dB for each bridged tap and 1 dB for each cable gauge change.
26
provides a guide for the loss that occurs when using
Table
Table 8. HDSL Signal Cable Loss
per kFt
(0.3048 km)
83.3
51.9
32.4
16.1
April 30, 2003
8. The table is applicable to HDSL
Loss @ 196 kHz
(dB per kFt)
3.880
2.841
2.177
1.535
HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01
Table 8
(a)