The Function Power Meter Model PF-810 is a passing type power/SWR meter covering a wide frequency range of 1.8MHz to 200MHz. It is a laboratory quality, professional instrument for observing and measuring forward power from transmitter to load (antenna) and reflection power from load to transmitter. It is also capable of measuring power actually consumed in load (forward power minus reflection power) for convenience of checking the conditions of transmitter and load, in addition to measuring SWR at power greater than 1W. Besides being used to monitor the operating conditions of transmitter or to adjust filters, matching circuit, etc., it is also used to monitor production lines and business use radio stations.