The computer hard drive is 50 years old this month. Take a look at the IBM RAMAC, which held 5MB of data and was the size of a refrigerator.
Being able to go back and forth easily between different HD Radio streams is educational in terms of processing--and being able to quickly study your competition's HD Radio audio, now that's what radio engineering is all about.
If you had the opportunity to equip yourself anew for the year, which pieces of equipment would make your core list?
When the work takes you outside the studio.
Doug Irwin put the Dscope test set through several tests of his own.
You have seen the TV spots for the latest and greatest products that we just can't live without. Recently there was one that caught the eye of our reviewer. It might have caught your eye as well.
While the basic skills of evaluating system performance are still in place, the tools and the methods used today are changing significantly. Digital signals require analog tools, but you can't neglect the analog elements either.
Radio magazine's annual Product Source, Beyond these walls.
A few engineers believe it is easier to maintain a digital audio chain because they no longer need to deal with the audible effects of ground loops, noise, crosstalk and mismatches typical in some analog signal paths. Wrong!
This interface facilitates making analog audio measurements with an oscilloscope.
Early solid-state audio spectrum instruments provided limited resolution, but the MSD100 offers a bright, easily read display of stereo separation and frequency dispersion.
Most digital equipment is woefuly lacking in its ability to display why it is unhappy. Luckily, the Digilyzer displays things such as lack of data compliance, bad cables or poor signal quality.
This test system interfaces to a Windows PC via a single USB connection. While the Dscope can be rackmounted with the appropriate hardware, its approximate 12" x 9" footprint makes for a good fit with a host laptop computer, thereby creating a portable, no-compromise audio test system.
The improvement of digital devices over analog is also obvious in most cases. But think about your facility: Is the digital improvement as good as it could be?
Modern equipment is stable and reliable, but some things should be checked on a regular basis.
Regardless of the compliment of analog and digital equipment, every station's goal is to maintain a quality audio signal through the entire chain.
Audio Precision has released a special Digigram version of its Application Note for PC audio device performance tests.
Ibiquity has completed tests for its FM IBOC system, and tests for the AM version are currently underway. What interests most broadcasters is understanding the test objectives. At this critical point in the acceptance of IBOC, stations should be aware of the efforts being made to develop a workable and realistic system.
Digital audio has provided radio with a means to deliver a higher-quality sound without requiring significant additional cost.
The explosive use and integration of the AES format in radio broadcast facilities has prompted several manufacturers to get in the game by building test equipment.
At some point in an engineer's career, questions such as How does our signal compare to so-and-so? or, Have we increased multipath along the highway lately?