Specification Power measuring range 50 0 dBm adding RF attenuator can expand to 100dBm Power measurement accuracy 0 1dBmFrequency measuring range 1MHz 10000 MHzPower measuring range 1nW 1mWOperating power supply 7 12VDCOperating current 50 mAOperating temperature 10℃ 55℃Storage temperature 20℃ 70℃Humidity 85 R H non condensationSize 55x45x10 mm LxWxH Operating Instruction ● Unit dBm● Button functions FUN function button MODE switching interface SEL Automatic adding or Subtracting button 1 1 Display data measuredScreen interface characters displayFirst row RF POW 51 2 dBm Second row 610uV7nW Explanation 51 2dBm refers to signal dBm value 610uV refers to input voltage value 7nW refers to input power value 1 2 Set RF power Attenuation valueScreen interface characters display First row RF Attenuator Second row SUB000dB Button operation FUN Function button select adding or subtracting option if displays SUB it refers to subtract value if displays ADD it refers to adding value Long pressing FUN button can save the pre setting dB value SEL Auto adding or Auto subtracting button Adding different RF attenuator user set related attenuation value the RF power meter can read correct power parameters Terminals Definition Pin Code DescriptionP1 Terminal VDD Operating power supply 7 12V GND Operating power supply P2 Terminals RF RF signal inputGND Power supply GNDFX No function Note dB is a counting uni