1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
This collection of video and a few audio files represents files that have been featured on the RF Cafe homepage. Every week or so a new file is added that should be of interest to RF Cafe visitors.
Please send me an e-mail if you have a good subject. Note: "Videos for Engineers" formerly went by the name "Cool Videos."
"The Lab in the Corner"Ode to test engineers
and the role they play in product quality, by Test & Measurement Magazine's Senior Technical Editor
A video collection of really clever Rube Goldberg mechanisms.
Control the Show
Show is a unique Christmas display which allows anyone in the world with a computer connection to log
on and control the lights. We are currently live each night from 5pm until midnight until New Year's
the salt patterns on the membrane change in response to varying frequencies. It gives me terrifying
flashbacks of physics exams with Bessel equations.
This is just amazing - a work of genius! Click on either image to view the video. This incredible video has been passed around the Internet as a real-life contraption. The myth is repeated widely; indeed, I received it in an e-mail from a friend that believed it to be real. The first thing I did was look at the University of Iowa website for the named music and engineering schools, and of course they did not exist. Here is the text that goes with the video clip:
"This incredible machine was built as a collaborative effort between the Robert M. Trammell Music Conservatory and the Sharon Wick School of Engineering at the University of Iowa. Amazingly, 97% of the machines components came from John Deere Industries and Irrigation Equipment of Bancroft Iowa, yes farm equipment!
It is now on display in the Matthew Gerhard Alumni Hall at the University and is already slated to be donated to the Smithsonian."
This is NOT a paid advertisement for Tektronix, but after reading about this new technology in an article in RF Design magazine and then visiting the Tektronix website, I felt a duty to bring it to your attention.
Shown above is a couple screen captures of one of the videos available on the Tektronix website. It pits an Agilent E4440A PSA against the Tektronix RSA6100 RSA with Digital Phosphor Technology (DPX™). The signal is a signal that is experiencing an infrequent frequency hop due to a faulty PLO. The DPX display not only captures more information in less time, but it uses color coding to imply the relative length of time a signal dwells at a particular frequency. Hotter colors (more duration) are redder, and cooler colors (less duration) are bluer. Click on the image above to select narrated videos of a number of different scenarios on ISM band and radar signals.