Item Description
one、Product Advantages：
1：Simple and efficient appearance，Beautiful and generous
2：Bandwidth，High sensitivity，100KHz-1000MHz（The original antenna is400-470MzOf，To test signals of different frequencies, antennas of different frequencies should be used for better effect and sensitivity.）
3：Pointer AmplitudeAdjustable！（Protect the watch head）
4：Built-in automatic damping function，That's the buffer function.，Prevent watch needle from swinging too fast to cause damage
5：Small size，Easy to carry！size：90*115*70mm（Excluding raised antenna parts）
6：Test sensitivity：1、0.1wTransmitter distance0.1-1rice
2、2W/5Wtransmitter，1-3Metre range。
3、10WTransmitter Departure2-5riceRange。
4、50Wabout3-10riceRange。
7.Net weight：170gram
useHP8921AThe sensitivity of the radio comprehensive tester is as follows:-20dbmJust started，-2dbmIt can be full of watches.（Video rates vary，Sensitivity also varies.）
two、Instructions：
Please put it before use.“Amplitude adjustment”Rotate to the leftmost end，The length of the antenna opening depends on the frequency of the test.，As far as possible1/4The waves are better.，The handheld walkie-talkie is about one meter away from the field strength meter，Don't get too close！Lest the signal burn out the field intensity meter too strongly！Then press the walkie-talkie.PTTKey，Put the walkie-talkie into the launching state，At this time, the pointer of the field strength meter should have signal indication.， The stronger the signal, the greater the indication.！
Amplitude regulation：If the pointer indication of the field intensity meter exceeds the maximum range，Adjustable“Amplitude regulation”，Let the pointer indicate the appropriate position，
three.A Method for Measuring Maximum Gain Point of Antenna
1.To change frequency quickly and conveniently，Choose a walkie-talkie with keyboard and manual frequency setting。
2.Link Interphone and Antenna Feeder Well，Place the field intensity meter near the antenna（Distance depends on the environment.），Place as far as possible in the vertical radiation angle of the antenna，And antenna planning is best the same。
3.Set Interphone Frequency，Press the launch button，Observe header readings，And register the header reading of this frequency point。Then set the walkie-talkie to other frequencies，Let the walkie-talkie be launched again，Observe header readings....Then the reading of each frequency point is compared.！The optimum frequency point of the antenna under test can be obtained./paragraph！
Package included
1pcs
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