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Campbell Scientific RF310, RF312, RF313 Narrowband Radios User Manual

Page 71

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Glossary

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VHF (Very High Frequency) - Carrier frequencies commonly in the range of
130 to 174 MHz.

VSWR (Voltage Standing Wave Ratio) - The ratio of the standing wave
voltage across the RF transmission cable at the high voltage points to that at the
low voltage points.

Unidirectional - Capable of operating only in a single direction.