Connection Diagram

Navini Networks, Inc. Ripwave Base Station I&C Guide

Part #40-00047-00 Rev F v1.0 (TTA) 137

October 23, 2003

sweeps to cover the same 360 degree area. The smaller beamwidth requires more sweeps but gives

you greater accuracy in determining the source of the interfering signal. On each pass the directional

antenna is moved per the beamwidth. Refer to Figure E2.

With both types of antennas, try to determine the polarization of the interfering signals during each

sweep. To do this, flip the antenna 90 degrees. All measurements that are captured are with the

antenna in the vertical polarization position.

The frequency band to be investigated is determined by the range of the BTS and RFS that is

purchased by a customer. The 2.6GHz MMDS band is a licensed band, and the customer purchasing

the equipment will have a license for a given 6MHz channel. The 2.4GHz band is an unlicensed

frequency range that is open for many applications. The objective for the 2.4GHz sweeps is to find a

5MHz range that is the clearest of any interference.

Figure E2: 90 Degree Directional Sweep

The 2.6GHz sweeps are done to verify that there is not another carrier infringing on the given

licensed channel. If you are performing the sweeps for a licensed 2.6GHz channel, it will greatly

reduce the number of steps that you will need to perform. For a 2.6GHz system you only need to

look at three channels for the spectrum. You will sweep the licensed channel as well as the channels

above and below the licensed band.

For example: If you have an E3 license (2.620GHz – 2.626GHz), you will sweep E3 plus F2

(2.614GHz-2.620GHz) and F3 (2.626GHz – 2.632GHz).

DEGREES

TEST

ANTENNA

POSITION 1

TEST

ANTENNA

POSITION 2

TEST

ANTENNA

POSITION 3

TEST

ANTENNA

POSITION 4