User's Manual

28/346 Issue 01 - April 2001 - Draft 04 3CC12426AAAA TQ BJA 01
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Bias-T power cable
A Bias-T power cable is used to provide power to each Bias-T, by connecting the surge arrester to a
–48 V dc power supply. Table 6 lists the Bias-T power cable specifications.
Table 6: Bias-T power cable specifications
Note:
(1)
The –48 V lead is attached to the center conductor of the cable.
BS IF cables
BS IF cables run between the 12:2 Combiner/Splitter and the X-Pol RBS Tx and X-Pol RBS Rx radios.
Each BS IF cable requires a lightning arrester to be installed on the cable at the indoor equipment shelter
grounded entry point, and a 1 m (3 ft) outdoor jumper cable to make the final connection to the X-Pol
RBS Tx/X-Pol RBS Rx. Table 7 lists the general requirements for BS IF cables. Tables 8, 9, 10 and 11
list the specifications of Alcatel-recommended Andrew, CommScope and Times Microwave IF cables.
The outdoor jumper cable is a finished assembly available from Times Microwave (part number FT-
400DB/3/NM/NF).
Table 7: BS IF cable specifications
Specification Description
Part number 90-6518-01
Maximum bias port current 2 A
Maximum operating voltage –72 V dc
Power supply connectors
–48 V power: #12 ring lug
(1)
0VR: #12 ring lug
Surge arrester connector BNC (F)
Specification Description
Impedance 50 W ±1 W
Frequency band 400 to 2050 MHz
Maximum VSWR 1.2:1
Average power rating (based on 300 m at 2 A dc) < 5 W
Jacket spark 5000 VRMS
Maximum connector insertion loss 0.2 dB
Minimum shielding –100 dB
Jacket flammability rating CATVP, CATVR, CATVX, CATV
(according to the environment where the cable
is installed)
Outdoor cable temperature range –40 to +50°C (–40 to +122°F)
Wind loading 200 km/h (125 mph)
Maximum phase change vs. temperature ±1°/GHz/°C