Boonton Electronics 56340 Peak Power Sensor 0.5 to 40GHz -34 to +20dBm二手 40GHz峰值功率探头Boonton Electronics 56340 Peak Power Sensor 0.5 to 40GHz -34 to +20dBm二手 40GHz峰值功率探头Boonton Electronics 56340 Peak Power Sensor 0.5 to 40GHz -34 to +20dBm二手 40GHz峰值功率探头Boonton Electronics 56340 Peak Power Sensor 0.5 to 40GHz -34 to +20dBm二手 40GHz峰值功率探头