In situ crosstalk measurements of long cables – the multi-network analyzer method
- Resource Type
- Conference
- Authors
- Collins, Chris J.; Bray, Joey R.
- Source
- 2017 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity (EMCSI) Electromagnetic Compatibility & Signal/Power Integrity (EMCSI), 2017 IEEE International Symposium on. :339-344 Aug, 2017
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
General Topics for Engineers
Nuclear Engineering
Photonics and Electrooptics
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Transportation
Ports (Computers)
Crosstalk
Power cables
Scattering parameters
Frequency measurement
Cats
- Language
- ISSN
- 2158-1118
Alien Crosstalk (AXT) between Ethernet cables produces interference and poses a potential threat to system security. AXT is challenging to measure in pre-existing installations because of the need for instrumentation at both the near and far ends. Although commercially available portable equipment for this purpose exists, baluns must be used to excite the balanced modes on Ethernet cables, which restricts the bandwidth and includes the unwanted response of the baluns. Here, a novel measurement system is proposed that does not use baluns. The proposed system uses unbalanced network analyzers that are placed at both ends of the cable run. The analyzers are synchronized and phase locked, and the resulting unbalanced crosstalk measurements are then mathematically converted to balanced and common modes. A new calibration method for multiple network analyzers is presented and validated. Worst-case crosstalk measurements using the novel system are then presented.