In the process of various types of examinations, in order to ensure examination discipline and examination fairness, most examination rooms are equipped with examination signal jammer. There are many judicial examinations, professional skills examinations, etc. Therefore, the demand for shielding devices in the examination room is particularly huge every year. At the same time, in the past 20 years, the standard types of mobile phones have been gradually upgraded from 2G to 5G, and the jammers in the examination room usually need to be updated on the same frequency every few years.
When selecting and purchasing test room jammers, the main points of concern are:
1. Whether the function of the jammer in the examination room meets the current shielding requirements of all types of signals;
2. Whether the price of the jammer in the examination room is reasonable, because it is usually purchased in bulk, so the price of the jammer in the examination room should not be too high;
3. If the price of the jammer in the examination room is too low, will it affect the quality and operating life of the equipment;
From the perspective of these three main concerns, the second and third points are actually focused on the price of the jammer in the examination room. So, what is the price of the test room jammer?
The cost and price of a test room jammer mainly include: equipment host shell, power supply, antenna, radio frequency signal source and power amplifier electronic components, power circuit board, etc. In order to control the shielding price cost of the examination room to a very low level, there is not much room to start in terms of the shell, power supply, and power supply circuit board. The input cost of each interference device manufacturer in the examination room is not very different. The big price difference is in the electronic components of the antenna, the radio frequency signal source and the power amplifier.
If the antenna does not use a standard RF antenna, but only uses a piece of spiral copper wire as the antenna, the test room jammer needs 10-12 antennas. In this way, the price of the test room jammer can be greatly reduced.
In the part of the RF signal source and power amplifier electronic components, the way to reduce the cost is actually to go to the market for second-hand components, or to disassemble the parts removed from the old mobile phone. In this way, you can quickly reduce the cost of this part. Save at least two-thirds.
As we all know, second-hand devices are not new materials after all, and there are many hidden dangers. Once second-hand devices are used, it will definitely affect the quality and working stability of the test room shield, and of course, its service life will be shortened!
Our company has always promised to never use second-hand components. Our purpose is to improve the quality of the jammer products in the examination room, and we do not pursue a low-price strategy to compare the price of the jammer in the examination room!