AES 131st Convention photo gallery
Audio DesignLine Blog 10/26/2011 Post a comment
A photo gallery from the show floor of the recent 131st AES Convention in NYC includes photos of everything from exhibits and audio product demos to audio publications and even an electromechanical Rastafarian!
TECH TRENDS: Front-end voice activation improves auto safety
Design How-To 10/20/2011 7 comments
The real problem for drivers is distractions, and the desire for additional productivity or entertainment that creates them. Distractions can be reduced through voice user interfaces to control the car without looking at buttons, and without having to touch them. Front-end voice activation is the next step in improving user interfaces.
A measurement approach for IQ offset and imbalance of LTE mobile devices
Design How-To 10/13/2011 Post a comment
Imperfect analog front-ends of mobile devices cause transmit signals to be non-ideal. Typically, the signal processing for inphase and quadrature (IQ) components is likewise affected. On the one hand, the undesirable zero-offsets of both digital-to-analog converters lead to the IQ offset, and on the other hand, the IQ imbalance originates from an imperfect up-conversion of the baseband signal.
Options for simulating wideband signals
Design How-To 10/11/2011 Post a comment
The need to take baseband signals and modulate them onto higher frequency carriers is fundamental for both the design and evaluation of communication and radar systems. How do we go about modulating and then upconverting wideband signals to their operational carrier frequencies for simulation?
Lights aren't so bright
Engineering Investigations 10/10/2011 15 comments
Confusing symptoms and misleading markings lead to a lengthy fault finding process for what turned out to be a simple problem.
E.T. phone home?
Blog 10/5/2011 2 comments
It’s said that for any sufficiently complex product, 80 percent of the users use only 20 percent of its features. I’d be willing to wager that’s true for Keithley Instruments’ products and plenty of other test and measurement instruments as well. Only problem is, how can I collect on that bet?