Tag: Electromagnetic Compatibility
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China Introduces Third-Party Reviews for Satellite Spectrum Coordination. A New Business Opportunity?
Suppose two satellite operators plan to use overlapping radio frequency bands. One concludes that their systems can operate compatibly; the other expects harmful interference. Each has a technical report, but repeated discussions fail to resolve the disagreement. Who should check the parameters, models and protection requirements? On September 4, 2026, China’s State Radio Office published…
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Every Unit Passed EMC Testing. Why Test the Whole Satellite?
The onboard computer runs normally on its own. The receiver passes its sensitivity test. The power controller, reaction wheel driver and transmitter each have a test report. Then engineers install them in the same satellite, and the results change: the receiver’s noise floor rises when the computer is heavily loaded; a sensor begins producing erratic…
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How Do Engineers Choose Satellite Cables? Power, Signal, RF and High-Voltage Lines Have Different Requirements
A satellite unit may work perfectly on a test bench, then develop problems after installation on the spacecraft: low supply voltage, fluctuating temperature readings, intermittent bus errors or higher-than-expected radio-frequency (RF) losses. The fault may lie in the cable connecting the unit. A cable is rarely a transparent path between two devices. It has resistance,…