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This is a passive field meter for testing walkie-talkies, not remote controls!!

 

I. Product advantages:

1: The appearance is simple and efficient, beautiful and generous

2: Wide frequency band, high sensitivity, 100KHz-1000MHz (the original antenna is 400-470Mz, please use different frequency antenna to test signals of different frequencies in order to have better effect and sensitivity)

3: The pointer amplitude can be adjusted! (To protect the watch head)

4: Built-in automatic damping function, that is, buffer function, to prevent the hand from swinging too fast to cause damage

5: small size, easy to carry! Size: 90*115*70mm (not including the raised antenna part)

6: Test sensitivity:

1. 0.1w transmitter is 0.1-1m away

2. 2W/5W transmitter, 1-3 m range.

3. The range of 10W transmitter is 2-5 meters.

4, 50W about 3-10 meters range.

7. Net weight: 170 grams

HP8921A radio comprehensive tester test sensitivity of -20dbm just start table, -2dbm can be full table (depending on the frequency, sensitivity will be different)

Ii. 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 test frequency. It is better to try 1/4 wave. Lest the signal is too strong to burn the field strength meter! Then press the PTT button of the intercom to make the intercom enter the transmitting state. At this time, the pointer of the field intensity meter should have signal indication. The stronger the signal is, the greater the indication will be!

Amplitude adjustment: if the pointer of the field intensity meter indicates beyond the maximum range, the "amplitude adjustment" can be adjusted to make the pointer indicate the appropriate position.

 

Iii. Antenna test method of maximum gain point

1. In order to change the frequency easily and quickly, the intercom with keyboard should be used to manually set the frequency.

2. Connect the intercom and antenna feeder, place the field intensity meter near the antenna (the distance depends on the environment), and place it in the vertical radiation Angle of the antenna as far as possible, and the antenna plan method should be the same.

3. Set the intercom frequency, press the transmit button, observe the watch head reading, and register the watch head reading at this frequency point. Then set the intercom to other frequency points, let the intercom into the transmission state again, observe the watch head reading.... Then compare the readings of each frequency point! You can know the optimal frequency point/segment of the antenna under test!