Codan-radio Radio Repeater Systems Training Guide Manuel d'utilisateur télécharger pdf (Page 59)

RADIO REPEATER SYSTEM | TRAINING GUIDE

Appendix E: Mobile Coverage Tests Page 51

APPENDIX E: MOBILE COVERAGE TESTS

Mobile coverage tests will give you an accurate representation of the coverage area of a repeater

site. Use two radios for the mobile coverage test, one radio (typically a mobile) for transmitting at pre-

determined mobile test points, and the other at the proposed repeater site. A portable or mobile must

be used at the repeater site that is the same RF power output of the ﬁ nal repeater to be installed. Using

a 25 watt mobile for coverage tests does not tell you much if you are going to replace it eventually with

a 2 watt repeater. It is important that the power output of both the radios be tested and noted at the

beginning and end of the test. Fresh batteries should be used.

For the repeater site radio, use a switched attenuator which will be installed in series with a temporary

antenna (a whip on a 9 meter (30 ft.) mast will do). DO NOT TRANSMIT THROUGH THE ATTENUATOR

as it will be severely damaged. The set-up is shown in Figure E-1

Figure E-1: Switched Attenuator

Test Portable

From Mobile at

Test Points

Whip or Ground

Plane Antenna

Switched attenuator

REMOVE WHEN TRANSMITTING

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Codan-radio Radio Repeater Systems Training Guide Manuel d'utilisateur Page 59