30W Medical Power Supply,B Ultrasound Power Supply,B Ultrasound Adapter Shenzhen Longxc Power Supply Co., Ltd , https://www.longxcpower.com
The field strength meter consists of a tuned crystal detector that produces an ac output voltage from a transmitted signal. In the case of 1650 kHz power supply operation, this AC voltage is used to convert a transmitter with a frequency of 100 mW. This frequency conversion is directly proportional to the received field strength. This unit has a range of a few hundred feet, which is specified in Article 15 of the FCC (between 510 kHz and 1705 kHz, 100 MW maximum power to 2 m long antenna)