User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description

CHAPTER 5. Additional Functions

and Tools

5.1 TTLNA/RET

The indoor SPI-2210 can support Tower Top Low Noise Amplifier (TTLNA) and Remote

Electrical Tilting (RET) when the AICU, 3

party device, is mounted on the system.

TTLNA has the structure that an antenna and LNA is integrated, and service provider can

select and use TTLNA to enhance the reception noise performance. At this time, the AICU

can supply the power to maximal 12 TTLNAs, and perform the alarm and control function

for the TTLNA.

The indoor SPI-2210 exchange with the alarm and control message for the TTLNA with

WSM through AICU (AISG interface), and MMA-S, and the WSM can carry out RET

function that control the vertical direction of the antenna beam at a remote site via such

path.

Figure 5.1 TTLNA/RET Interface

Indoor SPI-2210

MEI

MMA

•

WSM

(SNMP Manager)

AICU

TTLNA-0

TTLNA-1

TTLNA-11

Antenna

AISG