User's Manual

3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 27/346
104
Table 4: Surge protector connectors
2.3.7 – Cables
There are four types of cables used in the BS:
–SMA cables
– Bias-T power cable
– IF cable
– RS-422 data cables
SMA cables
SMA cables connect the Tx and Rx connectors on the IBS-TLX card faceplate to the Tx and Rx 12:2
Combiner/Splitters. Table 5 lists the SMA cable specifications.
Table 5: SMA cable specifications
Connector Type Purpose
Bias-T BNC(M) Connects to the Bias-T DC IN connector
Ground screw Slot-head screw Connects the surge protector body to a ground source
Bias-T power cable BNC(F)
Connects to the Bias-T power cable, which connects to the
–48 V power source to provide power to the X-Pol RBS Tx/
X-Pol RBS Rx
Specification Measure
Part numbers
2 m (6.6 ft): 90-6656-04
3 m (10 ft): 90-6656-01
6 m (20 ft): 90-6656-02
Impedance 50 W ±1 W
Frequency band 400 to 2050 MHz
Maximum VSWR 1.35:1
Maximum connector insertion loss
0.05 dB at 400 MHz
0.075 dB at 2 GHz
Average power rating (based on 150 m at 2 A dc) < 1W
Maximum loss over IF band
2 m (6.6 ft) cable: 0.8 dB
3 m (10 ft) cable: 1.0 dB
6 m (20 ft) cable: 2.0 dB
Minimum shielding (dB) –100 dB
Connector type SMA(M)
Minimum bend radius 25 mm
Maximum phase change vs. bending radius ±1°/GHz/mm
Operating temperature range –5 to +55°C (+23 to +131°F)
Relative humidity 5 to 95%, non-condensing