User Manual

Table 39. Worst-Pair Near-End Crosstalk (dB) Minimums
Specification Value (dB)
772 kHz 58
1.0 MHz 56
4.0 MHz 47
8.0 MHz 42
10.0 MHz 41
16.0 MHz 38
20.0 MHz 36
Values in Table 39 are shown for informational use only. The minimum near-end cross talk
(NEXT) coupling loss for any pair combination at room temperature is to be greater than the
value determined using the following formula for all frequencies in the range of 0.772 MHz to
20 MHz for a length of 1000 feet (305 m):






−>
772.0
log*15)772.0(
)(
MHz
MHz
F
NEXT
FNEXT
16 AWG (1.3 mm) “Generic” Cable Specifications
Tables 40 and 41 describe the specifications for the 16 AWG (1.3 mm) generic cable qualified
by Echelon for use with TP/FT-10 networks. The generic single twisted pair is stranded (19 x
29) with tinned copper.
The conditions listed in the tables are specified according to ASTM D4566 - 05e1 Standard
Test Methods for Electrical Performance Properties of Insulations and Jackets for
Telecommunications Wire and Cable (www.astm.org/Standards/D4566.htm
).
Table 40. General Specifications
Specification Minimum Typical Maximum Condition
DC resistance,
each conductor
14.0 14.7
15.5 Ω/km
20 ºC
DC resistance,
unbalance
— — 5% 20 ºC
Mutual
capacitance
— — 55.9 nF/km —
Characteristic
impedance
92 100 108 64 kHz to 1
MHz
Series 6000 Chip Data Book 133