Test Background
As a common natural environmental condition, low temperature environment is often caused by changes in geographical latitude, altitude, season, day and night, and the work of other refrigeration equipment. In ordinary electronic instruments, the strength of metal materials such as steel will decrease in low temperature environments, and the materials will easily become brittle, especially the ability to withstand impact loads will decrease to a certain extent.
The low-temperature test of digital communication equipment can determine the adaptability of digital communication equipment to storage and operation under low-temperature conditions. Zhongke Testing Reliability Experiment Center has the reliability performance of various digital communication equipment and provides professional low-temperature testing services for digital communication equipment.
Scope of tests
1. Divided according to business type: telegraph, telephone, video conference, fax, data communication, etc.
2. According to the transmission medium, it is divided into: wireless communication and wired communication
3. According to signal type, it is divided into: analog communication and digital communication
4. According to the signal multiplexing method, it is divided into: frequency division multiplexing, time division multiplexing and code division multiplexing
5. According to whether the communicator is moving, it is divided into: fixed communication and mobile communication
Test method
1. Low temperature storage test
1) The test temperature is -55°C or as specified in product standards (or technical documents).
2) The test time is after the temperature of the test sample reaches stable temperature, and then maintained for 12 hours or as specified in product standards (or technical documents).
2. Low temperature working test
1) The test temperature is the lowest working environment temperature of the test sample, and the corresponding severity level can be selected according to regulations.
2) The test time is when the test sample reaches temperature stability in the non-working state, and then the test sample is started to work until the test sample reaches temperature stability or the working time specified in product standards (or technical documents).
Test standard:
GB/T 13543-1992 Environmental test method for digital communication equipment
