The principle is that broadband is a wider frequency band than audio bandwidth, which includes most of the electromagnetic wave spectrum. A system using this broadband transmission is called a broadband transmission system. By utilizing frequency band transmission, the link capacity can be decomposed into two or more channels, each of which can carry different signals, which is called broadband transmission. All channels in broadband transmission can send signals simultaneously. Such as CATV, ISDN, etc. The transmission frequency band is very wide in>= There is a contradiction in the transmission rate of 128kbps. Broadband is used to transmit analog signals, with a data transmission rate range of 0-400Mb/s, while the commonly used transmission rate is 5Mb/s -10 Mb/s. It can accommodate all broadcasts and can perform high-speed data transmission. Broadband transmission systems are mostly analog signal transmission systems
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China