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MEASURING SWR
Measuring SWR shows you how much of your radio’s transmit power is
reflected from the antenna back into the antenna cable, generating heat and
wasting power. With this information, you can adjust the length of your
antenna or antenna cable so your antenna and radio combination can
produce the maximum power they are capable of producing.
CONNECTING THE METER
To connect this meter to your CB or amateur radio and your antenna, you
need RG-58U coaxial cable (not supplied) with a PL-259 connector on both
ends. The cable must reach from the back of the meter to your radio’s
antenna jack.
1. Turn off your radio. Then disconnect the antenna from the radio and
plug it into ANTENNA on the back of the meter.
2. Plug the coaxial cable into the radio’s antenna jack and into
TRANSMITTER on the back of the meter.
CALIBRATING THE METER/ MEASURING SWR
1. Set Switch on the front of the meter to FWD.
2. Turn on your radio. Then select a channel or frequency on your
transmitter and hold down the transmit key. Do not speak into the
microphone.
3. While you hold down the transmit key, move the sliding ‘Level Adjust’
control until the needle points to SET.
4. Release the transmit key, then set the switch to REF.
5. Press the transmit key again, then read the SWR by noting the
needle’s position on the upper SWR scale. A meter reading of 1 on the
upper scale is ideal.