An electronic device, e.g., laptop, etc., in radio-frequency communication with another electronic device can lose receiver sensitivity when certain components turn on. This is because electrical switching activity in the components can result in electromagnetic interference. Traditional methods of measuring receiver desensitization tether the device to a computer that carries out test sequences and logs measurements. However, the presence of the tethering cable itself causes additional electromagnetic interference. This disclosure describes techniques that enable untethered measurement of receiver desensitization. Per the techniques, an RF tester measures the packet error rate (PER) based on over-the-air acknowledgements received from the device under test. Receiver sensitivity, with and without active components, is measured by reducing transmit power until the PER just crosses a threshold. The device is characterized for receive-desensitization accurately and in a nearly real-use situation.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Lee, Ethan and Gu, Rex, "Untethered Desense Testing of Radio-Frequency Devices", Technical Disclosure Commons, (October 12, 2020)