User manual

Technical Product Manual - DCT1900
Configuration Directions, Base Station Powering
Config-DCT1900/R8/mw 4-5
© 2000-2005
The following resistance values for the twisted pairs are used:
z 26 AWG wire cable : .082 /ft.
z 24 AWG wire cable : .055 /ft.
z 22 AWG wire cable : .034 /ft.
Tables
Table 4–1 "Data Limited" Cable Length
* Cable lengths should never exceed the values given in Table 4–1, because of data limitations
Table 4–2 Maximum Cable Length when Powering via Data Pairs and Express Powering Pairs
Cable Maximum cable length
Superimposed noise
8 mV/pHz
Superimposed noise
10 mV/pHz
Type
Wire size (∅)
AWG
Capacitance
CLU
11/2
SLU
CLU-s
CLU
11/2
SLU
CLU-s
Twisted pair 26ga 15 pF/ft. 7540 ft. 4920 ft. 6560 ft. 4260 ft.
Twisted pair 24ga 15 pF/ft. 11480 ft. 6880 ft. 9840 ft. 6230 ft.
Twisted pair 22ga 40 pF/ft. 6880 ft. 4260 ft. 5900 ft. 3930 ft.
Double twisted pair
(J–Y (St)Y 2 2 0.6)
22ga 40 pF/ft. 6160 ft. 3930 ft. 4920 ft. 3280 ft.
Worst Case Power Consumption of Base Station = 7.5 W
Based pm Class 3 = 23 dbm
Minimum Input Voltage of Base Station = 21 V
Maximum Cable Length (feet)
Wire size
(
∅
)
Power Supply Voltage
27.5 V
Power Supply Voltage
42 V
Power Supply Voltage
48 V
0 EPP 1 EPP 0 EPP 1 EPP 0 EPP 1 EPP
26 awg 418 627 1405 2107 1842 2763
24 awg 627 941 2107 3161 2763 4145*
22 awg 1026 1539 3448* 5172* 4522* 6782*