Now, in the process of various types of examinations, in order to ensure examination discipline and fairness, the vast majority of examination rooms are equipped with examination room jammer. In addition to the most common high school entrance examination, college entrance examination, CET-4 and CET-6, adult college entrance examination, there are many judicial examinations, professional skills examinations, etc. Therefore, the demand for examination room jammer is particularly huge every year. At the same time, with the gradual upgrading of the mobile phone system from 2G to 5g in the past 20 years, the examination room jammer usually needs to be updated on the same frequency every few years.

When each examination competent unit selects and purchases the examination room jammer, the main concerns are:

1. Whether the function of the test room jammer meets the shielding requirements of all kinds of signals at present;

2. Whether the price of test room jammer is reasonable, because it is usually purchased in batches, so the price of test room jammer should not be too high;

3. If the price of the test room jammer is too low, will it affect the quality and service life of the equipment;

From these three main concerns, in fact, points 2 and 3 focus on the price of test room jammer. So, how does the price of the test room jammer constitute?

The cost price of an examination room jammer mainly includes: equipment host shell, power supply, antenna, RF signal source, power amplifier electronic components, power circuit board, etc. In order to control the shielding price and cost of the examination room to a very low level, there is not much room to start in terms of shell, power supply and power circuit board. There is little difference in the input cost of each examination room jammer manufacturer. It is in the antenna, radio signal source and power amplifier electronic components that there can be a large price difference.

If the standard RF antenna is not selected for the antenna, and only a section of spiral copper wire is used 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 fact, this method can reduce the cost of second-hand radio frequency components from the market.

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 inevitably have a 100% impact on the quality and working stability of the test room jammer, and of course, it will shorten its service life!

Our company has always promised never to use second-hand components. Our purpose is to improve the product quality of examination room jammer and not to compete the price of examination room jammer with low price strategy!