Work on resistance measurement, described in An Elementary Treatise on Electricity, helped pave the way to successful trans-Atlantic telegraphy. In Part 1, I discussed An Elementary Treatise on Electricity by James Clerk Maxwell. One volume made national news earlier this summer when it was returned to New Bedford, Mass. Free Public Library 115 years overdue. […]
Sensing
That Maxwell book that was returned to a library 115 years late: what’s it about? (Part 1)
Published in 1881, An Elementary Treatise on Electricity evolved from notes Maxwell had written in preparation for lectures on electricity at the Cavendish Laboratory. In June 2023, the national media carried a story about a book 115 years overdue that was returned to the Free Public Library in New Bedford, Mass. The book turned out […]
Co-packaged optics: promises and complexities
Integrating optics into the same package as switching ASICs improves signal integrity and increases data rates, but challenges remain. Near-packaged optics could emerge as an interim solution to the problem. The constant need for more throughput in data centers pushes engineers to develop ever-faster optical and electrical links. In addition to designing for more speed, […]
What are the critical measurements in satellite uplinks and downlinks?
Noise measurement, LO substitution, receiver stress testing, power measurement, CCDF and PAPR characterization, and antenna-pattern measurement play critical roles in link budget, bit-error rate, and SNR requirements.
What is an instrument driver and why do I need one?
Instrument drivers take some of the sting out of controlling test instruments by adding an abstraction layer. Almost everyone who uses computers has had experiences with drivers, and probably not good ones. In the olden days, if you had wanted to hook an old printer up to a new computer, you would have searched through […]
I’ve got the measurement blues again
Back from a three-year hiatus, I’m covering test and measurement again. This time, it’s for EE World.
Engineer ambitiously or be acquired?
Emerson Electric makes a significant offer to acquire NI, which is fighting back.
Putting the spotlight on infrared sensor technology
William Herschel was a gifted musician and composer who by chance obtained a 10-foot long, 30-inch reflecting telescope from the estate of his deceased friend, a violinist. Due to damage in moving it, he had to rebuild the instrument. This drew him into telescope making and then astronomy. He also discovered infrared radiation by placing […]
RF power sensors handle up to 90 GHz
New R&S NRP90S and R&S NRP90SN power sensors from Rohde & Schwarz combine an extraordinary frequency range of 50 MHz to 90 GHz with a dynamic range from -70 dBm to 20 dBm along with high measurement speeds of 50,000 measurements per second. Compared to current thermal power sensors for measurements over 67 GHz, the […]
RF power sensors cover –60 to +20 dBm, 50 MHz to 50 GHz range
The new R&S NRPxxP RF sensor family includes units with a measurement bandwidth up to 30 MHz, a new improved design and an extended frequency range. The three-model family covers frequency ranges from 50 MHz to 18 GHz, 50 MHz to 40 GHz, and a new top model for 50 MHz to 50 GHz. R&S […]
