To operate the c0 21-521a Micronta SWR meter, first connect it between your radio and antenna using the appropriate coaxial cables. Set the switch to the "SWR" position to measure the standing wave ratio. Transmit a signal at a low power level while observing the meter's readings; a lower SWR indicates better matching between the antenna and transmitter. Adjust your antenna as needed based on the readings, then recheck the SWR until you achieve optimal performance.
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