How to test the effective shielding Shielding radius of mobile phone signal jammers? Many users say that the shielding device is ineffective, and the actual shielding radius is short, but many of them are caused by wrong methods. So today I will introduce to you an accurate and fast method, how to detect the shielding range of the cell phone jammer on the spot?
The most feasible method is to field test multiple mobile phones. The detection 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 feasible test method. Compared with the limitations of testing software through mobile phones, and the need for conversion after testing with professional instruments, this method is the easiest for users to master. Methods as below:
Get ready first
Prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, 3G (preferably there are three 3G systems: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), then turn on the mobile phone signal jammer, hold each mobile phone , Test the effective shielding radius of the shielding device from near to far from the installation position of the mobile phone shielding device. It is recommended that the user should test the shielding distance in multiple directions with the shielding device as the origin at the same time.
Carry out inspection test
When checking whether the mobile phone is blocked, it should be noted that you cannot 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 real communication situation of the current mobile phone. This shield doesn't work. Instead, you should dial the mobile phone intermittently. You can try to dial the local toll-free number or fixed landline number. If you can't get through, it is judged to be still within the shielding range. Otherwise, it means that it has exceeded the shielding range.
Estimated location
After all the multiple frequency bands are tested, select the distance with the shortest shielding radius of a certain frequency band as the effective shielding radius of the mobile phone signal jammer in this area. The location can be estimated based on this when a large-area honeycomb layout is performed.\
The above is a very effective and simple way to test the radius of the shield in this environment, but it should not be judged prematurely. The shielding effect of this shield can only be so far. You should also check whether there are base stations around. The shielding effect has a great influence. If the shield can meet the range required by the examination room, it can be used with confidence.
Notice
To test whether a certain point is within the shielding range, you should hold the mobile phone at this position for more than half a minute to confirm whether the mobile phone is shielded.
If the phone is unplugged from the non-shielded area to the shielded area, the mobile phone will be completely shielded after walking into the shielded area for a considerable distance. This is because once the phone is unplugged, the mobile phone itself has the ability to resist interference. This anti-interference will make the mobile phone adjust the transmit power by itself 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.