How to Get Clean AM IBOC Audio - Radio World

How to Get Clean AM IBOC Audio

While we’re on the subject of AM HD Radio, I was talking to Cox Radio Orlando DOE Steve Fluker about cleaning up AM audio before it hits the transmission system.
Author:
Publish date:

While we’re on the subject of AM HD Radio, I was talking to Cox Radio Orlando DOE Steve Fluker about cleaning up AM audio before it hits the transmission system.

He says: “The end product of an AM HD station can be anywhere from a disappointment to something that will blow you away. A station needs to pay attention not only to the tuning of the antenna system, but also to the source program material.

“Because AM HD has a lower bit rate than FM, it’s important to try to feed the system with as pure of a program source as possible. Avoid playing audio that has already been compressed such as e-mailed MP3 files, or files delivered over some of the satellite systems.

“Also avoid STL systems that incorporate data compression. Keep the audio linear wherever you have full control from recording, to storage, to transmission, and you’ll get the best sound possible.”

Fluker says he’s heard AM HD stations where he preferred to listen to the analog signal, and on the other side of the coin, also listened to stations that sounded so good that he can “easily forget that I’m not listening to FM.”

Related

Rackley Delves into AM IBOC

Few members of the engineering community are as familiar as Ron Rackley of du Treil, Lundin & Rackley Inc. For this first issue of HD Radio News, we decided to check in with him on this thoughts about AM IBOC.

Test More AM IBOC Antennas

We're on the road to adopting a digital AM standard about which we don't know that much. Before we consider adopting the proposed AM IBOC system, we need to know what the minimum antenna system criteria are to achieve digital service on par with present-day analog service.