SBE Chapter 37
SBE Chapter 37
August 20, 2017  

Our Next Meeting

Gates Air

All Are Welcome at SBE Meetings;
SBE Membership is not Required

Meeting Date:

September 20, 2017 at 6:30 PM


WTOP Studios
3400 Idaho Ave, NW
Washington, DC 20016


We will be meeting at the WTOP studios in their 1st floor Conference Room. For access, please see the security desk at the entrance of the building.

WTOP is located at 3400 Idaho Ave, NW in DC. If you are familiar with Northwest DC, the studios are near the corner of Wisconsin and Idaho Avenues.  You should be able to find parking on the street (most parking is non-metered, two hour parking).  If you can't find on-street parking, you may wish to park at the nearby Giant Food garage for a nominal fee. 


By Mapquest

FM Composite Multiplex over IP STL

Guest Speaker: David Agnew

This month's SBE meeting topic, Transport Robust and Secure FM Composite Multiplex Signals Over an IP STL, is brought to us by David Agnew of GatesAir. 

The emergence of high bandwidth IP network connections is an enabler for the transport of the FM composite multiplex (MPX) signal in a Studio-to-Transmitter Link (STL). David will present use cases to illustrate differences between all analog, all digital, and dual domain FM MPX STLs and the tradeoffs they present with respect to compatibility and network bandwidth, scalability, and delay. They will also show how this IP based STL can be sent across legacy 950 MHz RF STL channels.  Those who attended our February meeting know how this IP based STL can be sent across industrial microwave channels.

David Agnew is the Channel Manager of Intraplex Products with GatesAir in Mason, Ohio. Mr. Agnew is responsible for management of Intraplex product distribution channels in North America. David recently returned to Gates Air in January of 2017. He has 30 years of experience in AM and FM broadcast engineering starting in 1986 as a self-employed contract engineer, 12 years with Harris Corporation, in various positions including Radio Field Service and FM Applications Engineering, and the last 12 years as Director of Engineering with iHeart Radio in Lincoln, NE and Northern Colorado markets. Mr. Agnew has been an SBE member and Certified Professional Broadcast Engineer, holds an AAS degree in Electronics Engineering and continued education in Mathematics and Computer Science. 

Brian Szewczyk, GatesAir's District Sales Manager for our region, will also be present to answer questions and provide a brief update on GatesAir's line of transmitter products.

Sandwiches, kindly provided by our friends at GatesAir will be served at 6:30 PM. We'll briefly discuss SBE business about 7:00 PM and begin our presentation shortly thereafter. Please RSVP before High Noon September 19th by dropping an e-mail to and let us know if we should expect you for dinner!

Be sure to mark your calendar for the SBE Chapter 37 picnic, which is scheduled for September 30th, just ten days after this meeting.

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