1
INTRODUCTION
Your Field-Strength SWR Meter helps you tune your CB or amateur radio
system for the best performance.
CB and amateur radio systems work best when the antenna system’s
impedance matches the transmitter’s output impedance as closely as possible.
The meter’s standing wave ratio (SWR) function helps you trim your antenna
to the precise length you need for the maximum transmitted power.
The meter’s field strength function helps you position your antenna for the
best coverage and determine the effectiveness of changes you make to your
antenna, antenna cable, and transmitter.
Carefully read all of these instructions to get the best use from this meter.
Warning: You can use this meter to make measurements on equipment that
uses high voltages. Carefully observe all safety precautions provided with the
equipment you are testing.
Note: You need a separate 50-ohm coaxial cable (such as RG-58U) with a
PL-259 connector connected to both ends, long enough to reach from your
radio’s antenna jack to the back of the meter.
CONTENTS
Measuring SWR
2
Connecting the Meter
2
Calibrating the Meter/Measuring SWR
2
Interpreting SWR Readings
3
Improving SWR
4
Measuring Field Strength
4
Preparing the Antenna Site
4
Calibrating the Meter/Measuring Field Strength
6
Using Field Strength Readings to Tune Your Antenna
7