Antenna SWR and radio power measurement

Radio antenna measuring instruments help tune the antenna system correctly and check a radio’s transmit output. This category includes the analogue PNI SWR-300 meter for 26–30 MHz, 50 Ω impedance and power measurement in 10 and 100 W ranges. The meter connects between the radio and antenna. It can check standing wave ratio (SWR), reveal poor tuning or a fault in the antenna path and verify the output of a CB installation. Before measuring, use a suitable patch cable and connectors, observe the connection direction and selected range, and follow the product instructions. A low SWR supports efficient signal transfer and helps protect the radio’s output stage from excessive reflected power.