User's Manual

RGPS Cabling for Multiple BTS Sites – continued

JAN 2002

4-29

SC300 1X BTS Hardware Installation, ATP, and FRU Procedures

DRAFT

Cable Connections

For a full signal description of the Site I/O cable, refer to Table 4-23 in

the “Site I/O, Span Line, RGPS and Modem Cabling” procedure.

The wire colors are based on the Site I/O cable.

NOTE

Table 4-31: Multi–BTS Cable Run List

Site I/O Interface of BTS N

(Sync Reverse)

Interconnecting

Cable

(Cable X)

Site I/O Interface of BTS N+1

(Sync Forward)

Color Signal RGPS Cable

Color

Color Signal

Black/Purple Data to Tail– Green/Black Brown/Grey Data from Head–

Black/Grey Data to Tail+ Green Brown/White Data from Head+

Black/White Data from Tail– White/Black Red/Black Data to Head–

Brown/Black Data from Tail+ White Red/Brown Data to Head+

Brown/Red 1 PPS to Tail– Brown/Black Red/Orange 1 PPS from Head–

Brown/Orange 1 PPS to Tail+ Brown Red/Yellow 1 PPS from Head+

Brown/Yellow 1 PPS from Tail– Red/Black Red/Green 1 PPS to Head–

Brown/Green 1 PPS from Tail+ Red Red/Blue 1 PPS to Head+

Black/Blue Ground* Blue/Black Black/Blue Ground*

*The Multi–BTS Synchronization interface must also be referenced to the BTS digital ground through a 7.5K

ohm, 1W resistor. This resistor has been integrated into the blue/black wire of Cable X. The end of Cable X

with the resistor should be connected to the Sync Reverse locations on the punch block of BTS N. The

opposite end of Cable X is connected to the Sync Forward locations on the punch block of BTS N+1 and may

be cut to the appropriate length.