Performance and Advantages
Advantages
Compared with terrestrial broadcasting systems, satellite broadcasting systems have many advantages. When receiving signals transmitted by broadcasting satellites in the equatorial synchronous orbit, due to the high elevation angle, the radio waves are less obstructed by high mountains or buildings, so satellite broadcasting can directly cover the entire country without the need to build a national microwave relay program transmission network on the ground, saving construction funds from a macro perspective. Compared with terrestrial microwave relay networks, satellite broadcasting has fewer transmission links and is less susceptible to natural disasters, resulting in no ghosting of the received images. In addition, the modulation method of broadband frequency modulation has the characteristics of high clarity and low distortion, which is higher in quality than the television broadcasting using residual sideband amplitude modulation on the ground. Satellite broadcasting has increased the flexibility and timeliness of news reporting, allowing programs to be directly sent to satellites using established mobile uplink stations on site. Out-of-town programs can also be directly sent to satellites, or several television centers nationwide can take turns sending programs to satellites for nationwide broadcasting
Broadcast frequency band
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