Manual

XMI (T r ansceiv er Module Internal) Module Chapter 7: XMI R eplacement Procedures

Connectors/Ports

The following text describes each connector/port on the XMI front panel.

• +27V & R TN - XMI DC input power connections. Connects to corresponding XMI DC

power connector on the PDU of the UBS Macro frame. The PDU XMI DC power connector

supplies protected +27 V via a 90 A circuit breaker . The +27V pin is the positive feed and

R TN (i.e., DC ground) pin is the negative return.

• RX1 M, RX2 M, RX3 M - Main RX antenna signal input from the corresponding sector

(i.e., 1, 2, 3) Integrated Duplexer RX Filter (IDRF). These connectors are for a single

coaxial cable connection.

• RX1 D , RX2 D , RX3 D - Diversity (i.e., DIV) RX antenna signal input from the

corresponding sector (i.e., 1, 2, 3) IDRF . These connectors are for a single coaxial cable

connection.

• RX EXP OUT - Buffered sector Main and Diversity RX antenna signal outputs from the

respective sector multi -carrier , dual -receive path RF receivers. These output signals

are meant for distribution to an RX splitter or another XMI. This connector supports

multi -coaxial cable connections.

• RX EXP IN - Sector main and diversity RX antenna signal inputs to the respective

sector multi -carrier , dual -receive path RF receivers. These input signals are meant for

distribution from an RX splitter or another XMI. This connector supports multi -coaxial

cable connections.

• TXD - Present on 800 MHz XMI only . TX Distribution (TXD) I/O port supports up to three

TX RF small signal inputs (i.e., one per sector to each sector TX RF LP A in the XMI) and

up to three TX RF small signal outputs (i.e., one per sector from each sector multi -carrier

RF transmitter in the XMI). Must be terminated with a TXD connector or cable to the

TXD connector on a future TX combiner . This connector supports multi -coaxial cable

connections.

• TX1, TX2, TX3 - TX RF power output signals (i.e., one per sector from each sector TX RF

LP A in the XMI). These sector TX RF power output signals are routed to the corresponding

sector IDRF TX antenna port. These connectors are for a single coaxial cable connection.

TX1, TX2 and TX3 are used for a 3 -sector antenna conﬁguration.

Only TX1 is used for a 1 -sector (i.e., Omni) antenna conﬁguration.

• CONTROL - (for future use) This connector supports I/O control signals that are

exchanged between the XMI and the future frame mounted TX combiner . This connector is

a 9 -pin female subminiature D type connector .

• HSL1 & HSL2 - High -speed Serial data Link (HSL) port connectors that each provide a

1.2288 Gbps high -speed serial data links between the XMI and the respective DMI. The

high -speed serial data links support the transfer of baseband I & Q data as well as control

data between the DMI and XMI. These connectors are cabled to the appropriate XMI

high -speed serial data link connector on the DMI front I/O panel.

7 -10 68P09283A64 -3

FOA SEP 2007