ADC H2TU-C-231 Instrukcja Użytkownika Pobierz pdf (Strona 64)

Appendix A - Specifications LTPH-UM-1109-01, Issue 1

56 January 9, 2002 H2TU-C-231 List 2

LOOP ATTENUATION,INSERTION LOSS, AND REACH

Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135Ω,asshown

in Table 21 below. This is equivalent to no more than 28 dB loop attenuation.

Table 21. HDSL2 Reach Chart

Cable Gauge

Insertion Loss

(a)

196 kHz (dB/kft)

(a) Insertion Loss = 1.25 times loop attenuation

Loop Attenuation

(dB/kft)

Maximum Reach

(kft)

Ω per kft

26/0.4 mm 3.88 3.1 9 83

24/0.51 mm 2.84 2.2 12 52

22/0.61 mm 2.18 1.7 16 32

19/0.91 mm 1.54 1.2 23 16

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 73 74

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ADC H2TU-C-231 Instrukcja Użytkownika Strona 64