User's Manual Part 2

RBS 2109 User’s Guide

Example of an Unacceptable SWR Measurement

P010277A

CAL ON LIM ON 259 POINTS RECALL

2.00

1000.0FREQ (MHz)800.0

1.00

M3=OFFM1:1.03,889.9MHz

M4=OFFM2:1.19,959.7MHz

ALL

OFF

SWR ANTENNA 900

1.4

Figure 41 Example

of an Unacceptable SWR Measurement, GSM 900, No

TMA

6.8 Performing SWR Test on Antenna Systems with

ddTMA

The purpose of the SWR test is to verify the antenna system when it is

completely installed. The test verifies that the SWR is not too high and that the

signal is not reflected back into the RBS.

6.8.1 Connecting SWR Test Setup

This section describes how to connect the SWR test setup for antenna systems

with ddTMA.

Note: The ddTMA need not be powered-up in this test setup as only the

downlink band is being tested.

1. Connect the test equipment to the RBS jumper, see figure below.

2. Check that all connections are properly connected and tightened.

91EN/LZT 720 0090 Uen R1A 2004-09-17