User's Manual
ZXC10 CBTS O1 Hardware Installation Manual
76 Confidential and Proprietary Information of ZTE CORPORATION
6. For floor mounted BTS tower, ensure feeder cable is properly grounded
at 19.68 inch ~ 39.37 inch a (500 mm ~ 1000 mm) above the bend
where it connects antenna and leaves tower body, and outside the
entrance to the equipment room. For feeder cable longer than 2362.20
inch (60 m), ground it in the middle and connect its metallic outer
layer to grounding busbar through grounding kit. Lead a tin plated
copper wire with a cross section area more than 95 mm
2
or zinc-plated
flat steel out of busbar to connect corresponding grounding tower point.
Ensure following while connector installation:
Keep feeder cable always straight.
Use special-purpose tools for cutting feeder cables.
Measure cable length precisely.
Use knife to strip the sheath of feeder cable avoid scratching external
conductor.
Keep plug-in components firm while tightening connector with spanner.
Turn connector fastener so that connector is fastened firmly.
Attach labels on both ends of main feeder cable before it is placed onto
the tower.
Lightning Arrester Installation
Connect all cables coming out of BTS antenna equipment room to lightning
arrester, which are connected to ground cable. There are various lightning
arresters, this section describes λ/4 stub as an example.
Take following steps to install lightening arrester:
1. Install lightning arrester between 7/8" main feeder cable and 1/2"
cabinet-top jumper after main feeder cable enters equipment room.
Lightening arrester has two DIN connectors, one is positive and other
is negative. Keep maximum installation torque for lightning arrester
with DIN connectors up to 25 N m, and with N connectors up to 1.7 N
m. Use adjustable torque spanner to adjust torque to specified value.
2. Lightning arrester has four RF ports, which connects to 7/8" main
feeder cable and 1/2" cabinet-top jumper. RF ports can be connected
either to antenna or to BTS, which provides protection against lightning.