Examination room-type mobile phone jammers configured in some standardized examination room projects now often put forward some special requirements for the appearance of the shielding device, including one: a working status indicator light needs to be configured on the device shell, and the device needs to be The different frequency bands in the tester have working indicator lights as one-to-one correspondence to feedback the real working status of this test room-type shielding device. Then the question arises: Is it necessary to install many working indicator lights on the casing of the mobile phone jammer installed and used in the standardized examination room? Can these indicator lights feed back the real working status?

The reason why such a requirement is put forward in some projects is that it is actually an exclusive option used by some test room mobile phone jammer manufacturers to control the number of bidding codes or exclude other similar products. It is an attempt to create some exclusive technical indicators through the appearance of the device or individual small functional differences. Although these products are clearly marked with status indicators with more than ten power frequency bands, it is not difficult to find the problem as long as they are carefully tested and functionally verified. For example: For example, the most common mobile phone jammer in the examination room with 5G signal shielding function is usually equipped with 12 signal shielding modules. Normally, there are 12 status indicators corresponding to it. In addition, it should It also includes at least one power indicator light indicating whether the host power supply is powered on or not. Then let's distinguish carefully, what are the functions of these 13 indicator lights? The first is the power-on indicator of the host power supply, which is not difficult to understand. When the switch of the mobile phone jammer is turned on and the device receives power, the host power indicator is always on. What information is fed back by the remaining 12 indicator lights? When all these indicator lights are on, does it mean that all the 12 signal shielding modules are working normally? The real result is disappointing, because some manufacturers may just connect these 12 indicator lights to the power supply indicators of the modules. When these lights are lit, it just means that each module has received effective power supply. In fact, it does not represent whether each module is working normally. For example, some modules are indeed powered, but in fact their signal source or power amplifier has failed. The module actually does not shield the signal from being emitted, but, Since the indicator light is still on, the customer cannot know the real fault information of each module in the shielding device.

In fact, we don't advocate that the mobile phone jammers in the examination room should be equipped with more function indicators. There are two reasons: the first reason is that too many indicator lights can not really represent the failure of each module in the device. , unless it is a circuit for fault detection and analysis for each signal shielding module, and the indicator light is wired out from the detection circuit. The second reason is that the mobile phone jammer is installed in the classroom of the examination room. It is one of the supporting protection products for the standardized examination room. It is not appropriate to make these supporting products too conspicuous. If there are many lights on a shielding device during the examination Flickering or flickering frequently due to faults, which will attract the attention of candidates and distract students.