Feature:
1. Simple and efficient appearance, beautiful and generous2. Wide frequency band, high sensitivity, 100KHz-1000MHz (the original antenna is 400-470Mz, test signals of different frequencies, please use antennas of different frequencies to have better results and sensitivity)3. Adjustable pointer amplitude (to protect the watch head)4. Built-in automatic damping function, that is, buffer function, to prevent the watch hand from swinging too fast to cause damage5. Small size, easy to carry6. Test sensitivity: (1) 0.1W transmitter from 0.1-1m (2) 2W/5W transmitter, 1-3 m range (3) 10W transmitter from 2-5 m range (4) 50W about 3-10m rangeWith HP8921A radio comprehensive tester test sensitivity of -20dbm just start the table, -2dbm can be full table (different frequency, sensitivity will be different)

Instructions for use:
Before use, please rotate the "amplitude adjustment" to the leftmost end, the length of the antenna should be determined according to the frequency of the test, as far as possible 1/4 wave is better, the handheld walkie-talkie is about one meter away from the field intensity meter, do not be too close! Lest the signal is too strong to burn the field intensity meter! Then press the walkie-talkie PTT button to make the walkie-talkie enter the transmitting state, at this time the pointer of the field intensity meter should indicate the signal, the stronger the signal, the greater the indication!Amplitude adjustment: If the pointer of the field intensity meter indicates that it exceeds the maximum range, the "amplitude adjustment" can be adjusted to allow the pointer to indicate the appropriate position.

Antenna test the maximum gain point method:
1. In order to easily and quickly change the frequency, a walkie-talkie with a keyboard should be used to manually set the frequency.2. Link the walkie-talkie and antenna feeder, place the field intensity meter near the antenna (distance depends on the environment), and try to place it in the vertical radiation Angle of the antenna, and the antenna planning method is best the same.3. Set the radio frequency, press the transmit key, observe the reading of the watch head, and register the reading of the watch head at this frequency. Then set the intercom to other frequency points, let the intercom enter the transmitting state again, and observe the reading of the watch head.... Then compare the readings of each frequency point! You can know the best frequency point/segment of the antenna under test! Note: This passive field intensity meter is used to test the intercom, not to test the remote control!!!

Package Included:
1 x 1ield Strength Indicator Meter RF Signal Level Meter1 x Antenna