Codan Radio Radio Repeater Systems Training Guide - Manual (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