To use the MFJ-962D Versa 3 tuner, first connect your transceiver to the "Transmitter" input and your antenna to the "Antenna" output. Set the tuner to the desired frequency band and ensure the transceiver is transmitting a low power signal. Adjust the tuning knobs while observing the SWR (Standing Wave Ratio) meter until you achieve a low SWR reading, indicating a matched impedance. Finally, ensure to switch the tuner to the "Bypass" position after tuning if you wish to operate without it.
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