How to test the effective shielding distance of the mobile phone signal jammer in the hospital? Many users say that the shielding device is ineffective and the actual shielding radius is short, but many of them are caused by incorrect methods.
The most feasible method of the hospital cell phone jammer is the field test of a variety of mobile phones. The test should not be too one-sided: Use multiple mobile phones with multiple frequency ranges to test the shielding effect of the mobile phone signal jammer on the spot. This is the most convenient, most trouble-free and most 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 the easiest for users to grasp.
Methods as below:
Prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, 3G (it is better to have three types of 3G: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), then turn on the mobile phone signal jammer and 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 simultaneously test the shielding distance in multiple directions with the shielding device as the origin during testing.
When checking whether the mobile phone is blocked, you should pay attention not to just check the signal grid number on the mobile phone, because the signal grid number on the mobile phone is sometimes false and does not represent the actual communication situation of the current mobile phone. At this time, we must not draw conclusions too early. This shield has no effect. Instead, you should dial the mobile phone intermittently. You can try to dial a local toll-free number or a fixed landline number. If the call fails, it will be judged to be still in the shielding range. Otherwise, the shielding range is out of 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 mobile phone is completely shielded. This is because once the mobile phone is dialed, the mobile 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 the multiple frequency bands are tested, the shortest shielding radius of a certain frequency band is selected 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.
The above is a very effective and simple way. (Hospital mobile phone signal jammer) test the jammer radius in this environment, but it should not be judged too early. The shielding effect of this jammer can only be so far, and the surrounding area should be checked. Whether there is a base station or not, environmental factors have a great influence on the shielding effect. If the shielding device can meet the requirements of the examination room, it can be used with confidence. Shangkino focuses on the research and development and production of mobile phone signal shielding devices.