ENGINEERING EXHIBIT
Incentive Auction Channel Sharing
Application for Digital Television Station Construction Permit prepared for
Commonwealth Public Broadcasting WNVT(DT) Spotsylvania Courthouse, VA Facility ID 10019 Ch. 42 160 kW 346 m
Commonwealth Public Broadcasting (“Commonwealth”) is the licensee of digital television station WNVT(DT), Channel 30, Facility ID 10019, Goldvein, VA. Commonwealth was a winning bidder in the FCC’s incentive auction to relinquish WNVT’s spectrum, as specified in the Incentive Auction Closing and Channel Reassignment Public Notice (“CCRPN” , DA 17-317, released April 13, 2017). Commonwealth proposes to become a channel share station with WCVE-TV, Facility ID 9987, Richmond, VA, which is also licensed to Commonwealth . WNVT will be the guest (sharee) station, utilizing the transmitting facilities of sharer (host) station WCVE-TV.
Commonwealth herein seeks a “channel share” Construction Permit to utilize the pre- auction RF Channel 42 facility associated with WCVE-TV. WCVE-TV has been reassigned to Channel 22 with a transition at phase 8 (March 13, 2020), and WNVT’s operation will transition to Channel 22 at phase 8 with WCVE-TV. The technical parameters specified herein for WNVT match the licensed Channel 42 WCVE-TV facility as described in license file number BLCDT- 20050606AHG.
The proposed principal community coverage contour (48 dBµ) for WNVT does not encompass the existing principal community of Goldvein VA. Commonwealth proposes to change WNVT’s principal community to Spotsylvania Courthouse, VA, consistent with the procedures described in the Incentive Auction 1 proceeding.
1“Expanding the Economic and Innovation Opportunities of Spectrum Through Incentive Auctions”, Report and Order, FCC 14-50, released June 2, 2014, at para. 374-378.
Engineering Exhibit Commonwealth Public Broadcasting (WNVT) (page 2 of 3)
The Census Designated Place of Spotsylvania Courthouse is located in Spotsylvania County, Virginia. According to 2010 U.S. census data, Spotsylvania Courthouse has a population of 4,239 persons and an area of 27.3 square kilometers. The allotment of WNVT to Spotsylvania Courthouse would provide that community with its first television transmission service.
A map is supplied as Figure 1 which depicts the proposed predicted coverage contours based on the FCC’s standard propagation curves of §73.625(b). The map demonstrates that Goldvein is beyond the WNVT proposed principal community contour as well as the proposed noise limited service contour (“NLSC”). Figure 1 shows that Goldvein and Spotsylvania Courthouse are within the same DMA, Washington, DC (Hagerstown, MD). The proposed principal community contour covers a portion of Spotsylvania Courthouse, encompassing 1,262 persons and 12.3 sq. km within the boundaries of Spotsylvania Courthouse (29.8 percent of the total population and 45.1 percent of the total area of the community). The proposed NLSC encompasses all of Spotsylvania Courthouse.
Figure 2 supplies the results of a supplemental method of determining 48 dBµ signal levels for principal community coverage according to the Longley-Rice methodology. 2 The Longley-Rice model shows that all of Spotsylvania Courthouse will be covered by signal levels of at least 48 dBµ from the proposed WNVT channel share facility. The average signal level across all Longley-Rice grid points located within Spotsylvania Courthouse is 66.6 dBµ, well in excess of the 48 dBµ requirement. Thus, the proposed facility complies with §73.625(a)(1) based on this supplemental method. 3
2Irregular Terrain Model / National Bureau of Standards Technical Note 101, version 1.2.2 of the Longley- Rice code. Computer code for the Longley-Rice point-to-point radio propagation model is published in an appendix of NTIA Report 82-100, “A Guide to the Use of the ITS Irregular Terrain Model in the Area Prediction Mode,” authors G.A. Hufford, A.G. Longley and W.A. Kissick, U.S. Department of Commerce, April 1982. Some modifications to the code were described by G.A. Hufford in a memorandum to users of the model dated January 30, 1985. With these modifications, the code is referred to as Version 1.2.2 of the Longley-Rice model.
3Channel share applications that rely on Longley-Rice showings of principal community coverage have recently been granted for other relinquishing stations including WFFP-TV (Danville, VA, file# 0000035584) and WLWC(DT) (New Bedford, MA, file# 0000029635).
Engineering Exhibit Commonwealth Public Broadcasting (WNVT) (page 3 of 3)
List of Attachments Figure 1 Principal Community Coverage Figure 2 Principal Community Coverage Longley-Rice
Chesapeake RF Consultants, LLC Joseph M. Davis, P.E. February 15, 2018 207 Old Dominion Road Yorktown, VA 23692 703-650-9600
Grant Kent Anne Arundel Queen Anne's Loudoun Hardy
\ 0 \0 0\
0\0\\ 0\0\\0\0\\
\00\\0\0\0\0 Caroline \\0\ \\00\\0\0
\00\\00\00\\0\ Warren Falls Church
\\0\00\\0\\00\\ Chesapeake RF Consultants, LLC \\0\00\\0\\00\\ \00\\00\00\\0\ Radiofrequency Consulting Engineers Fauquier Figure 1 \\00\\0\0\\0\\ Prince George's \00\\0\0\0\0 DigitalShenandoah Television and Radio Talbot 0\0\\0\0\\ 0\0\\0\0 \ 0\0 Manassas Park Principal Community Coverage Proposed Channel Sharing Pendleton Rappahannock Sussex Prince William WNVT(DT) Spotsylvania Courthouse, VA Page Facility ID 10019 Rockingham Goldvein, VA Calvert Existing Principal Charles CommunityCulpeper prepared for Harrisonburg StaffordSpotsylvania Courthouse, VA Dorchester Highland Madison Proposed Principal Commonwealth Public Community Wicomico Washington DC Broadcasting Corporation (Hagerstown, MD) St. Mary's GreeneDMA Boundary King George Augusta Orange February, 2018 Worcester Somerset Staunton Spotsylvania Proposed WNVT Ch. 42 Westmoreland ChannelWaynesboro Sharee with WCVE-TV FCC Contours Charlottesville 48 dBµ Principal Community Louisa Caroline 41 dBµ DTV Service Rockbridge Essex Richmond Fluvanna Northumberland Lexington Nelson Buena Vista Goochland Hanover King and Queen Lancaster Accomack Amherst Buckingham Powhatan Middlesex Richmond Cumberland Henrico New Kent Lynchburg Gloucester Appomattox Amelia Northampton Chesterfield Charles City Colonial Heights Williamsburg Campbell Prince Edward Petersburg Nottoway Newport News Surry Channel Sharer (Host) Dinwiddie Hampton WCVE-TV Richmond,Charlotte VA Facility ID 9987 Pre-Transition Facility Lunenburg Isle of Wight Ch. 42 160 kW 346 m BLCDT-20050606AHG Norfolk Pittsylvania Sussex Halifax Brunswick Virginia Beach Mecklenburg Emporia Franklin Suffolk Chesapeake Danville Greensville Scale 1:1,500,000 Currituck km Northampton 0 20 40 60 V-Soft Communications LLC ® © Gates Camden Caswell Person Vance Warren Hertford Granville Halifax Pasquotank Grant Kent Anne Arundel Queen Anne's Loudoun Hardy
\ 0 \0 0\
0\0\\ 0\0\\0\0\\
\00\\0\0\0\0 Caroline \\0\ \\00\\0\0
\00\\00\00\\0\ Warren Falls Church
\\0\00\\0\\00\\ Chesapeake RF Consultants, LLC \\0\00\\0\\00\\ \00\\00\00\\0\ Radiofrequency Consulting Engineers Fauquier Figure 2 \\00\\0\0\\0\\ Prince George's \00\\0\0\0\0 DigitalShenandoah Television and Radio Talbot 0\0\\0\0\\ 0\0\\0\0 \ 0\0 Manassas Park Principal Community Coverage Predicted Longley-Rice Coverage Pendleton Rappahannock Sussex Prince William Proposed Channel Sharing WNVT(DT) Spotsylvania Courthouse, VA Rockingham Page Calvert Facility ID 10019 Culpeper Charles Harrisonburg StaffordSpotsylvania Courthouse, VA Dorchester Highland Madison Proposed Principal prepared for Community Wicomico Commonwealth Public St. Mary's Greene King George Broadcasting Corporation Augusta Orange Worcester Somerset Staunton Spotsylvania February, 2018 Westmoreland Waynesboro Charlottesville Louisa Sharer Facility: WCVE-TV Caroline Ch. 42 160 kW 346 m Essex Rockbridge BLCDT-20050606AHG Richmond FCC Contour Northumberland 41 dBµ (NLSC) Fluvanna Lexington Nelson Buena Vista Goochland Hanover King and Queen Lancaster Accomack Amherst Buckingham Powhatan Middlesex Richmond Cumberland Henrico New Kent Lynchburg Gloucester Appomattox Amelia Northampton Chesterfield Charles City Colonial Heights Williamsburg Campbell Prince Edward Petersburg Newport News Nottoway Surry Dinwiddie Hampton Charlotte Lunenburg Isle of Wight Sussex Norfolk Pittsylvania Halifax Brunswick Virginia Beach Mecklenburg Emporia Franklin Suffolk Chesapeake Danville Greensville Longley-Rice Predicted Signal Level Scale 1:1,500,000 USGS 3 sec terrain, Cell size 0.75 km, Step size 0.1 km Northampton Currituck km 0 20 40 60 48 dBµ or Greater V-Soft Communications LLC ® © Gates Camden Caswell Person Vance Warren Hertford Granville Halifax Pasquotank