Propagation Studies

A propagation study is an graphical estimate of the probable coverage of a radio system.

Contour Studies

A contour study is computer model of service areas and interference areas.  Used as a very (very) rough idea of which systems will cause interference to each other.  Often used in licensing by coordinators and the FCC.

Interference Studies

A TSB-88 interference study is a detailed propagation study that shows the level and location of interference between two radio system, based on the standards of TSB-88.

Canadian Coordination HIA (Harmful Interference Anticipated) Study

A special propagation study accepted by Canada for purposes of determining whether a proposed US station will receive approval from the Canadian government.

Canadian HIA Pre-Qualification

A study which determines the likelihood of a Canadian objection to a frequency within the U.S. Canadian Coordination Zone

Point to Point Path Study.

A study which determines if two sites have sufficiently clear line of sight to be linked together.

DHAAT (Directional Height Above Average Terrain)

A study used to determine the availability and maximum ERP for a proposed short-spaced 800 MHz station.

800 MHz Waiver Package

A study used to determine the availability and maximum ERP for a proposed short-spaced 800 MHz station that requires a waiver under rule Part 90.621.

ERP Study and Justification

Contour study and dBu analysis of a requested ERP that is in excess of 90.205.

Frequency Availability Study

An estimate of channel availability based on the above studies.  Detailed information can be found in the FCC Licensing section.

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