User Manual

BTS Equipment Identification – continued

SC4812ET BTS Optimization/ATP — CDMA LMF

Jan 2002

1-18

SC 4812ET Trunking Backplane

The Trunking Backplane contains a complex passive RF network that

allows RF signals to share the resources of a bank of four LPAs. It also

provides DC Power and digital interconnect.

SPAN I/O

RFGPS

RF CABINET

(Rear View)

RFDS Expansion

RF Expansion

Exp. Punch

Punch

Block

27V

27V Ret

DC Conduit

Pilot Beacon

Microwave

RF GPS

LAN

2 Sec Tick

19 MHz Clock

Ground Cable

Lugs

1–3 Sector Antennas

4–6 Sector Antennas

Span/Alarm

Expansion 1

Expansion 2

RF CABINET

(Rear Door closed)

RGPS

FW00147

Figure 1-5: SC 4812ET Intercabinet I/O Detail (Rear View)