Nokia Solutions and Networks T5DK1 사용자 설명서

68P64115A19

–

4

Mar 2003

1X SC 4812T-MC BTS Hardware Installation - Software Release R2.16.1.x

4-3

Duplex directional couplers (DDCs) are used when it is desired to
duplex transmit and receive antennas. This device incorporates
directional coupler function so separate directional couplers are not
required.

The 

Universal Bracket is designed for mounting on a 19-inch rack, to the

wall, or on a cable ladder.  This bracket is 19 

x

 15 inches and can

accommodate up to six sets of DDCs (or directional couplers). After the
DDCs are mounted on the Universal Bracket, the whole assembly will
extend 6-1/2 inches from the mounting surface.

Figure 4-2 shows the Duplex Directional Couplers (mounted in the
universal mounting bracket) and identifies the connections.

Figure 4-2: DDC (Duplexers – Directional Couplers)

ANT COUPLED

PORT – REFLECTED

BTS COUPLED

PORT – FORWARD

ANTENNA

RX TO BTS

(RFM)

TX FROM

BTS (RFM)

UNIVERSAL
BRACKET

DDCs

ti-CDMA-WP-00063-v01-ildoc-ftw–REF