User Manual

Internal Assembly Location and Identification – continued

PRELIMINARY

SC 4812ETL BTS Optimization/ATP

08/15/2000

1-18

Duplexer/Directional Coupler (DRDC)

The DRDC combines, in a single module, the functions of antenna

duplexing, receive band pass filtering, and surge protection (see

Figure 1-6).

Filter/Combiner Shelf (Bandpass Filters or 2:1 Combiners)

The Filter/Combiner Shelf holds the transmit band pass filters or 2:1

combiners, depending on system configuration.

Simplified CDMA Channel Processor (SCCP) Shelf

The SCCP shelf contains the following (see Figure 1-4):

S High Stability Oscillator (HSO)/LFR (Optional) card

S Clock Synchronization Manager (CSM) on 2 cards (one with GPS

receiver, if ordered).

S CDMA Clock Distribution (CCD) cards (2)

S Power Supply cards (2)

S Multicoupler Preselector Cards (MPC) (2)

S Alarm Monitoring and Reporting (AMR) cards (2)

S Multi–Channel CDMA (MCC24) cards (up to 4)

S Broadband Transceiver (BBX2) cards (up to 6 with one redundant)

S Combined Input/Output (CIO) (1)

S Group Line Interface (GLI2) cards (2)

S BBX2 Switch card (1)

S Filler Panel

S Fan Module (2)