How to conduct effective shielding distance when testing mobile phone signal jammer?

How to conduct effective shielding distance when testing mobile phone signal jammer?

How to test the effective shielding distance of a cell phone jammer? Many users say that the jammer is ineffective and the actual shielding radius is short, but many of these are caused by incorrect methods. So today the editor will introduce to you an accurate and fast method. How to detect the shielding range of the jammer on the spot?


The most feasible method is field testing with multiple mobile phones. The test should not be too one-sided: Use multiple mobile phones with multiple frequency bands to test the shielding effect of the mobile phone signal jammer on site. This is the most convenient, trouble-free and most feasible testing method. Compared with the limitations of mobile phone testing software and the need for conversion after testing with professional instruments, this method is the easiest for users to master. Methods as below:

signal jammer

Prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, and 3G (it is best to have three standards of 3G: China Mobile TD-SCDMA, China Unicom CDMA2000, China Telecom WCDMA), then turn on the mobile phone signal jammer, and hold each mobile phone , test the effective shielding radius of the mobile phone jammer from near to far from the installation position of the mobile phone jammer. It is recommended that users should simultaneously test the shielding distance in multiple directions with the signal blocker as the center during testing.

When checking whether the mobile phone is blocked, you should be careful not to just check the number of signal bars on the mobile phone, because the number of signal bars on the mobile phone is sometimes false and does not represent the actual communication situation of the mobile phone. You must not draw conclusions prematurely at this time. This blocker doesn't work. Instead of dialing the phone intermittently, you can try to dial a local toll-free number or a fixed landline number. If the call cannot be connected, it is judged that it is still within the shielding range. Otherwise, if the call is connected, it means that it has exceeded the shielding range.

After testing all multiple frequency bands, select the distance with the shortest shielding radius of a certain frequency band as the effective shielding radius of this mobile phone signal jammer in this area. This can be used to estimate the location when carrying out large-area cellular distribution.

The above is a very effective and simple way to test the radius of the jammer in this environment, but you should not judge prematurely. The shielding effect of this jammer can only go so far. You should also check whether there are base stations around. Environmental factors will affect the shielding effect. The shielding effect has a great influence. If the shield can meet the needs of the examination room, it can be used with confidence.


To test whether a certain point is within the shielding range, you should hold the mobile phone at that position for more than half a minute to confirm whether the mobile phone is blocked.

If you make a call from an unshielded area and go to a shielded area, you will often have to walk a considerable distance into the shielded area before the phone will be completely blocked. This is because once the phone has made a call, the phone itself has the ability to resist interference. This kind of anti-interference will cause the mobile phone to adjust its transmit power to ensure a normal call. Therefore, it is generally not recommended to perform dynamic testing during a call, but static testing should be performed at various points.

First five articles:How does the jammer in the examination room achieve signal shielding?How to determine the installation point of mobile phone signal jammer?What are the antennas of wireless signal jammers?Misunderstandings about using signal jammers in examination roomsIndoor and outdoor use distance of mobile phone signal jammer Last five articles: How to install a mobile phone signal jammer? Does it need to be placed high?What is the minimum blocking range of a mobile phone signal jammer?How to break the mobile phone signal jammer in the examination room? How do you block the signal?Can a mobile phone signal jammer block 5G WiFi?GPS signal jammer technical classification and principle analysis
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