Technical Bulletins

References for the RF industry

Technical Sheets

"How-to's" on Shively products

Calculators

Presentations by Bob Surette

• "Shively Labs Meets the Very Windy Mountain"
  from May-June 2008 Radio Guide
• "Shively Labs: Antennas That Work!"
  from September 2007 Radio Guide [279 kB]
• "Shively 6014 Dual Hybrid Antenna Solves a Dilemma"
  from September 2007 Radio Guide [232 kB]
• Vermont Public Radio's Mt. Mansfield Project (October '06)
• West Virginia Public Radio chooses BE, Shively (reprinted from Radio Currents, 6/5/06)
• Interdigital combining technology at 4 Times Square (July '05)
• 4 Times Square, NY: 21-station master FM project (April '04)
• Revolutionary IBOC test at Cougar Mountain (August '02)

Handy Calculators for RF Engineers

	Calculators are Microsoft Excel spreadsheets.
	These materials are for your on-line use. Please note that some are copyrighted. Contact Shively for copying and distribution information.

IBOC Injection Analysis

For high-level (non-coherent) and mid-level (coherent) IBOC injection.

• The calculator for high-level (non-coherent) IBOC injection is used to analyze the combining of a single digital transmitter and a single analog transmitter for broadcast over a common antenna. By adjusting the “Analog Output” (amount of analog power being sent up the transmission line) and “Coupler” values, it is possible to get a complete overview of the entire power budget of the transmission system (with the exception of line losses). This makes it possible to determine the most cost effective coupling solution.
• The calculator of mid-level (coherent) IBOC injection is used to analyze the combining of an existing analog transmitter and a new, combined analog/digital transmitter for broadcast over a common antenna. “Total Analog Output” is the total analog power of the combined transmitters that is being sent up the transmission line.

Dissipated Power and Heat Generated in a Filter

If you know your transmitter power and your insertion loss in dB ...