Shielding boxes belong to the category of non-standard test equipment. In the face of many shielding box manufacturers and so many types of shielding boxes, how to choose the most suitable shielding box has become the focus. Today, the decimal point compiled by the shielding box manufacturer will give you a detailed introduction to some techniques of shielding box purchase.
First, the operation mode of the shielding box
When we need to use the shielding box in the process of research and development, production and testing, we must first clearly know what is the operation mode of the shielding box we need? Generally, the shielding box is divided into manual shielding box, pneumatic shielding box, and semi-automatic shielding. box. The pneumatic shielding box is generally divided into electric switch button control, RS232 serial port control, and fully automatic program shielding box. Only when we know what kind of operation is needed, we can make further judgments.
Second, the frequency of the shielding box
After confirming the operation mode of the shielding box, we also need to know the frequency of the product we are testing, and what frequency band signals need to be isolated. Only in this way can we know how to choose the absorbing material inside our shielding box, and which frequency band is the focus of the filter processing method of the interface. Only in this way can we obtain the most suitable high isolation shielding box for us.
Third, the size of the isolation box
After we know the frequency, we will talk about the size. Shielding box manufacturers generally provide us with an internal size and an external size. So how do we choose? Generally speaking, the choice of size is based on the size of the box, because our test products are placed inside the shielding box. For the internal size here, we not only consider the size of our products, we also need to consider The size of the space we need when testing. Including if there is the size of the fixture, will we increase our size requirements after the subsequent upgrade of our products? Only in this way can we avoid the shelving of the shielding box due to the upgrade of the subsequent company's products. Generally, we also need to consider the external dimensions, because our shielding box needs to be placed in the actual test environment. In the actual application process, the placement of other instruments and the operating position of the personnel need to be taken into consideration.
Fourth, shielding box interface
After the above three points are completed, we need to consider the data interface configuration of our shielding box. Now in the testing process, many customers who need shielding box need data connection. Generally, the data interface of the shielding box is DB9/DB25/RJ45/AC/DC/USB, etc. These are an indispensable part of our testing process, what types are needed, and how much each type needs. We have to know this well and avoid waiting for the shielding box manufacturer to process it before we discover that we can’t use it at all.
Fifth, shielding box manufacturers
It is very important that we face so many shielding box manufacturers, how should we choose. Generally, when choosing a shielding box manufacturer, you first need to understand the strength of the manufacturer, including plant, registered capital, R&D configuration, production configuration, maintenance configuration and other information. Then it is necessary to consider the reputation of this manufacturer in the industry. The gold cup and silver cup are not as good as the reputation of the common people. To which manufacturers and types of customers are the products made by this shielding box manufacturer, how is the annual shipment volume, and whether it is acceptable Become your long-term partner. Many people have overlooked these issues, causing the subsequent maintenance of the shielding box to be dealt with.