Multi-frequency test signal jammer equipment effect
Using multiple mobile phones with multiple frequency ranges to test the shielding effect of cell phone jammer in the field is a convenient, trouble-free and feasible test method. Compared with the limitations of passing the mobile phone test software, and the need to convert after passing the professional instrument test, this method is easy for users to grasp. Methods as below:
Prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, 3G (There are three types of 3G: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), and then turn on the mobile phone signal jammer, hold each mobile phone, The effective shielding radius of the mobile phone shielding device is tested from near to far. It is recommended that the user should test the shielding distance in multiple directions from the shielding device at the same time during testing.
When checking whether the mobile phone is blocked, you should pay attention: you can't just check the signal grid number on the mobile phone, because the signal grid number on the mobile phone is sometimes false, and you should dial the mobile phone intermittently. You can try to dial a local toll-free number or a fixed number. If the landline number cannot be dialed, it is judged to be still in the shielding range, otherwise, it means that it is out of the shielding range.
To test whether a certain point is within the shielding range, hold the mobile phone in this position for more than half a minute to confirm whether the mobile phone is shielded.
If you dial the phone from the unshielded area to the shielded area, you will often walk into the shielded area for a considerable distance before the phone is completely shielded. This is because once the phone is dialed, the phone itself has the ability to resist interference. This kind of anti-interference will make the mobile phone adjust its transmitting power to ensure the normal call this time. Therefore, it is generally not recommended to perform dynamic testing in the call state, but to perform static testing at various points.
After testing all the multiple frequency bands, select a certain frequency band with a short shielding radius as the effective shielding radius of the mobile phone signal jammer in this area. The position can be estimated based on this when carrying out a large-area honeycomb layout.
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Pass the signal strength test software
At present, many smart phones on the market can be installed with software to test the signal field strength of mobile phones, such as Dopod, HCT and other types of smart phones, can be installed "Wucell Intercontinental Positioning" software, etc., used to test the field of 900M and 1800M mobile phone signal field Strong. There are also many signal test software available for download on the Internet that can be applied to a variety of smart phones (the operating system of the phone needs to be distinguished).
The user can contact the supplier to obtain the relevant test software and install it on his mobile phone.
At present, the software commonly used in the market to test signal field strength through mobile phones is basically only for the 900M and 1800M frequency bands. Test software for other frequency bands is rare. Therefore, the use of mobile phone test software to test has certain limitations and can only be used as part of it. For reference only.
Through professional instruments
Test instruments generally include: spectrum analyzers, drive testers, comprehensive testers, special test mobile phones, etc. The use of professional instruments for testing requires the presence of professional and technical personnel. The measured data is relatively accurate. After conversion, these data can provide a theoretical basis for how to estimate the location of the site.
