Technology360

Understanding the FM digital broadcasting power increase

Sid Shumate has a pair of articles for engineers in Radio Business Report explaining in some depth the FCC's recent decision to authorize greater power for FM digital broadcasting.  In it, he proposes an alternative formula for cases involving  MP3 (multicast Mode P3) transmission.

The IBOC Power Increase, Part I; Understanding the Power Increase Formula

The IBOC Power Increase, Part II; Other D/U Ratios, and a MP3 Mode Power Increase Formula

--Dennis

 

Radio Narcissus

 The current number of a mainstream magazine to which I subscribe but won't identify has a short article on how to modify one of those little FM transmitters used to connect your iPod or smart phone to your car radio in order to illegally increase its range beyond Part 15 limits.  Many of these operate in the spectrum below 92 MHz, so have been a problem source of interference to public radio broadcast listeners. 

These modifications will be attractive to people whose conceit is that the contents of their iPod is more important to their fellow commuters than what it is they're already tuning in.  --Dennis