ENGINEERING EXHIBIT
Application for Digital Television Station Construction Permit prepared for
Gray Television Licensee, LLC WIBW-TV Topeka, KS Facility ID 63160 Ch. 13 65.5 kW 403 m
Gray Television Licensee, LLC (“Gray”) is the licensee of digital television station WIBW-TV, Channel 13, Facility ID 63160, Topeka, KS. WIBW-TV is licensed (file# BLCDT- 20110111ABO) to operate with 42 kW effective radiated power (“ERP”) at 413 meters antenna height above average terrain (“HAAT”). In connection with the replacement of the main antenna, Gray proposes herein to increase the ERP to 65.5 kW and decrease the HAAT to 403 meters. This application is intended to be filed during the temporary lift of the freeze on minor modification applications that expand the coverage contour. 1
The proposed WIBW-TV facility will employ a new antenna system to be top-mounted on the WIBW-TV tower in lieu of the existing antenna. The existing tower structure corresponds to FCC Antenna Structure Registration number 1032648, having an overall structure height above ground of 380.7 meters. The replacement antenna has a shorter length and will result in a reduction in the structure’s overall height to 362.1 meters above ground level. Following construction, the FAA will be notified of the reduction in height and the FCC ASR will be modified accordingly.
The proposed antenna is an elliptically polarized nondirectional Dielectric model THV- 10A13/VP-R O4 (25 percent vertical polarization). The horizontally polarized ERP is 65.5 kW and the vertically polarized ERP is 16.4 kW.
1Public Notice “Media Bureau Temporarily Lifts the Freeze on the Filing of Minor Modification Applications that Expand the Contour of Full Power and Class A Television Stations from November 28 through December 7, 2017” DA 17-1086, released November 6, 2017.
Engineering Exhibit Gray Television Licensee, LLC (WIBW-TV) (page 2 of 3)
Figure 1 supplies a map that demonstrates compliance with §73.625(a)(1) regarding coverage of the entire principal community. The proposed facility’s predicted population exceeds 95 percent of the Incentive Auction 2 baseline facility population.
Interference study per FCC OET Bulletin 69 3 shows that the proposal complies with the 0.5 percent limit of new interference caused to pertinent nearby post-auction full service and Class A television stations and reassignments as required by §73.616. FCC processing of this proposal is requested using a 2 km cell size and 0.5 km terrain profile increment. The interference study output report is provided as Table 1. TVStudy analysis also shows that the proposed power increase would not cause impermissible interference to any pre-auction facility that was reassigned or relinquished in the incentive auction.
The nearest FCC monitoring station is 294 km distant at Grand Island, NE. This exceeds by a large margin the threshold minimum distance specified in §73.1030(c)(3) that would suggest consideration of the monitoring station. The site is not located within the areas requiring coordination with “quiet” zones specified in §73.1030(a) and (b). There are no authorized AM stations within 3 kilometers of the site. The site location is beyond the border areas requiring international coordination.
Human Exposure to Radiofrequency Electromagnetic Field (Environmental) The proposed operation was evaluated for human exposure to RF energy using the procedures outlined in the FCC’s OET Bulletin Number 65. Based on OET-65 equation (10), and considering 15 percent antenna relative field in downward elevations (pattern data shows less than 15 percent relative field at angles 20 to 90 degrees below the antenna), the calculated signal density near the tower at two meters above ground level attributable to the proposed facility is 0.5 µW/cm 2, which is 0.25 percent of the general population/uncontrolled maximum
2Incentive Auction Closing and Channel Reassignment Public Notice , DA 17-317, released April 13, 2017.
3FCC Office of Engineering and Technology Bulletin number 69, Longley-Rice Methodology for Evaluating TV Coverage and Interference , February 6, 2004 (“OET-69”). This analysis employed the FCC’s current “TVStudy” software with the default application processing template settings, 2 km cell size, and 0.5 km terrain increment. Comparisons of various results of this computer program (run on a Mac processor) to the FCCs implementation of TVStudy show excellent correlation.
Engineering Exhibit Gray Television Licensee, LLC (WIBW-TV) (page 3 of 3)
permitted exposure limit. This is well below the five percent threshold limit described in §1.1307(b) regarding sites with multiple emitters, categorically excluding the applicant from responsibility for taking any corrective action in the areas where the proposal’s contribution is less than five percent.
The general public will not be exposed to RF levels attributable to the proposal in excess of the FCC’s guidelines. RF exposure warning signs will continue to be posted. With respect to worker safety, the applicant will coordinate exposure procedures with all pertinent stations and will reduce power or cease operation as necessary to protect persons having access to the site, tower, or antenna from RF electromagnetic field exposure in excess of FCC guidelines. This exhibit is limited to the evaluation of exposure to RF electromagnetic field.
List of Attachments Figure 1 Proposed Coverage Contours Table 1 OET Bulletin 69 Interference Study Form 2100 Saved Version of Engineering Sections from FCC Form at Time of Upload
Chesapeake RF Consultants, LLC Joseph M. Davis, P.E. November 27, 2017 207 Old Dominion Road Yorktown, VA 23692 703-650-9600
Otoe Adams Clay Fillmore Saline
\ 0 \0 0\ 0\0\\
0\0\\0\0\\ Worth
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\00\\00\00\\0\ Mercer \\0\00\\0\\00\\ Chesapeake RF Consultants, LLC Atchison \\0\00\\0\\00\\ \00\\00\00\\0\ Radiofrequency Consulting Engineers Johnson Nemaha Figure 1 \\00\\0\0\\0\\ Harrison \00\\0\0\0\0 Nodaway 0\0\\0\0\\ Digital Television and Radio 0\0\\0\0 \ 0\0 Proposed Coverage Contours Gage WIBW-TV Topeka, KS 0° Gentry Webster Nuckolls Thayer Jefferson Facility ID 63160 Pawnee Richardson Grundy Holt Ch. 13 65.5 kW 403 m
Andrew preparedDaviess for DeKalb Linn 45° Gray Television Licensee, LLC Republic 315° Brown Livingston Jewell Washington Marshall Nemaha Doniphan November, 2017 Proposed WIBW-TV Buchanan Caldwell 43 dBµ (Principal Community) Clinton 36 dBµ Atchison (Noise Limited ServiceCloud Contour) Carroll Mitchell Jackson Pottawatomie Clay Platte Ray Clay Riley Jefferson Leavenworth Saline Ottawa Topeka, KS Wyandotte Lafayette Lincoln 270° Shawnee 90° Jackson Geary Wabaunsee Douglas Johnson Dickinson Saline Johnson Pettis Ellsworth Morris Cass Osage Franklin Miami
Lyon McPherson Henry Rice Marion Chase Benton Bates 225° Coffey Anderson Linn 135°
Harvey St. Clair Reno Hickory Greenwood Woodson Allen Area Population 180° Bourbon Vernon Proposed Digital Coverage (sq. km) (2010 Census) Within Noise Limited Service Contour 42,580.3 1,205,540Butler OET Bulletin 69: TVStudy Scale 1:1,750,000Cedar Within noise limited contour Sedgwick42,699.8 1,234,347 km Not affected by terrain losses 41,118.8 1,162,507 0 20 40 60 Polk Lost to all interference 1,034.8 22,854 V-Soft Communications LLC ® © Net Interference-FreeKingman Service 40,084.0 1,139,653 Wilson Neosho Crawford Barton Elk Dade Table 1 WIBW-TV OET Bulletin 69 Interference Study (page 1 of 4) tvstudy v2.2.4 (Z2Qqz3) Database: localhost, Study: WIBW-TV Prop 65.5 kW, Model: Longley-Rice Start: 2017.11.27 14:00:11
Study created: 2017.11.27 14:00:11
Study build station data: LMS TV 2017-11-26 LMSTV
Proposal: WIBW-TV D13 DT APP TOPEKA, KS File number: WIBW-TV Prop 65.5 kW Facility ID: 63160 Station data: User record Record ID: 1547 Country: U.S. Zone: II
Stations potentially affected by proposal:
IX Call Chan Svc Status City, State File Number Distance Yes KSQA D12 DT LIC TOPEKA, KS BLCDT20110919ABN 32.6 km Yes KSCW-DT D12 DT LIC WICHITA, KS BLCDT20110203ACC 182.4 No KUON-TV D12 DT LIC LINCOLN, NE BLEDT20090406AIP 239.5 Yes WHO-DT D13 DT LIC DES MOINES, IA BLCDT20090410ASQ 373.5 No KUPK D13 DT LIC GARDEN CITY, KS BLCDT20090226ABS 430.0 Yes KFJX D13 DT LIC PITTSBURG, KS BLCDT20110906AFG 230.5 Yes KHGI-TV D13 DT LIC KEARNEY, NE BLANK0000001675 302.6 Yes KETA-TV D13 DT LIC OKLAHOMA CITY, OK BLEDT20140929AOU 399.6
No non-directional AM stations found within 0.8 km
No directional AM stations found within 3.2 km
Record parameters as studied:
Channel: D13 Latitude: 39 0 22.00 N (NAD83) Longitude: 96 2 58.00 W Height AMSL: 749.2 m HAAT: 402.8 m Peak ERP: 65.5 kW Antenna: Omnidirectional Elev Pattrn: Generic Elec Tilt: 1.00
36.0 dBu contour: Azimuth ERP HAAT Distance 0.0 deg 65.5 kW 439.2 m 120.1 km 45.0 65.5 445.2 120.6 90.0 65.5 425.7 118.7 135.0 65.5 401.8 116.1 180.0 65.5 361.2 112.7 225.0 65.5 333.5 110.4 270.0 65.5 386.8 114.7 315.0 65.5 428.9 119.0
Distance to Canadian border: 1065.8 km
Distance to Mexican border: 1137.2 km
Conditions at FCC monitoring station: Grand Island NE Bearing: 317.2 degrees Distance: 294.0 km
Proposal is not within the West Virginia quiet zone area
Conditions at Table Mountain receiving zone: Bearing: 281.8 degrees Distance: 795.6 km
Study cell size: 2.00 km Profile point spacing: 0.50 km
Maximum new IX to full-service and Class A: 0.50% Maximum new IX to LPTV: 2.00% Table 1 WIBW-TV OET Bulletin 69 Interference Study (page 2 of 4)
------Interference to BLCDT20110919ABN LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: KSQA D12 DT LIC TOPEKA, KS BLCDT20110919ABN
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 32.6 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 32.6 KTWU D11 DT LIC TOPEKA, KS BLEDT20090917AAW 7.8 KSCW-DT D12 DT LIC WICHITA, KS BLCDT20110203ACC 212.1 KRCG D12 DT LIC JEFFERSON CITY, MO BLCDT20030709ABP 312.3 KUON-TV D12 DT LIC LINCOLN, NE BLEDT20090406AIP 241.5 KGEB D12 DT CP TULSA, OK BLANK0000029672 335.0
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 10899.4 382,328 10328.6 364,129 6907.2 317,213 6827.1 315,781 1.16 0.45
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 1777.8 19,660 183.7 667 WIBW-TV D13 DT APP 2189.2 25,786 263.8 2,099 KTWU D11 DT LIC 2946.4 41,200 981.7 16,533 754.1 12,562 KSCW-DT D12 DT LIC 1001.9 15,264 191.4 4,570 183.4 4,526 KRCG D12 DT LIC 31.9 514 0.0 0 0.0 0 KUON-TV D12 DT LIC 574.4 4,562 19.9 15 15.9 8 KGEB D12 DT CP 12.1 23 0.0 0 0.0 0
------Interference to BLCDT20110203ACC LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: KSCW-DT D12 DT LIC WICHITA, KS BLCDT20110203ACC
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 182.4 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 182.4 KSQA D12 DT LIC TOPEKA, KS BLCDT20110919ABN 212.1 KUON-TV D12 DT LIC LINCOLN, NE BLEDT20090406AIP 360.0 KSNK D12 DT LIC MCCOOK, NE BLCDT20031017ABP 321.2 KGEB D12 DT CP TULSA, OK BLANK0000029672 275.8
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 46162.0 915,691 44408.5 910,730 42567.8 902,583 42563.8 902,583 0.01 0.00
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 28.1 4 4.0 2 WIBW-TV D13 DT APP 56.3 6 8.0 2 KSQA D12 DT LIC 332.5 1,984 168.5 1,315 152.4 1,313 KUON-TV D12 DT LIC 292.0 1,028 155.9 381 155.9 381 KSNK D12 DT LIC 52.1 188 32.1 179 32.1 179 KGEB D12 DT CP 1332.0 5,627 1300.2 5,592 1300.2 5,592
------Interference to BLCDT20090410ASQ LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: WHO-DT D13 DT LIC DES MOINES, IA BLCDT20090410ASQ
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 373.5 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 373.5 KIIN D12 DT LIC IOWA CITY, IA BLEDT20091229ABP 188.7 WREX D13 DT LIC ROCKFORD, IL BLANK0000005114 365.1 KSFY-TV D13 DT LIC SIOUX FALLS, SD BLCDT20090223ABE 305.0
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 49101.2 1,151,807 47904.9 1,125,381 47512.1 1,117,997 47411.9 1,117,609 0.21 0.03
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 180.4 379 152.1 338 WIBW-TV D13 DT APP 284.7 790 252.3 726 KIIN D12 DT LIC 44.3 177 44.3 177 44.3 177 WREX D13 DT LIC 43.9 3,733 43.9 3,733 43.9 3,733 KSFY-TV D13 DT LIC 152.5 3,136 124.2 3,095 120.1 3,072 Table 1 WIBW-TV OET Bulletin 69 Interference Study (page 3 of 4)
------Interference to BLCDT20110906AFG LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: KFJX D13 DT LIC PITTSBURG, KS BLCDT20110906AFG
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 230.5 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 230.5 KEMV D13 DT LIC MOUNTAIN VIEW, AR BLEDT20100608ACU 266.6 KETA-TV D13 DT LIC OKLAHOMA CITY, OK BLEDT20140929AOU 307.4
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 25789.4 515,708 25084.6 510,751 23621.5 490,014 23264.1 488,022 1.51 0.41
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 1211.6 18,737 984.1 6,537 WIBW-TV D13 DT APP 1641.0 21,430 1341.5 8,529 KEMV D13 DT LIC 63.9 710 47.9 606 47.9 606 KETA-TV D13 DT LIC 415.1 13,490 203.5 1,394 131.5 693
------Interference to BLANK0000001675 LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: KHGI-TV D13 DT LIC KEARNEY, NE BLANK0000001675
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 302.6 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 302.6 KUPK D13 DT LIC GARDEN CITY, KS BLCDT20090226ABS 368.5 KTNE-TV D13 DT LIC ALLIANCE, NE BLEDT20090225ABJ 373.8 KPLO-TV D13 DT LIC RELIANCE, SD BLCDT20131113AIL 367.6 KSFY-TV D13 DT LIC SIOUX FALLS, SD BLCDT20090223ABE 371.6
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 31829.3 233,973 30764.6 228,829 30207.9 224,257 30042.7 223,474 0.55 0.35
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 411.7 852 342.9 785 WIBW-TV D13 DT APP 593.1 1,789 508.1 1,568 KUPK D13 DT LIC 157.7 279 88.9 212 72.7 58 KTNE-TV D13 DT LIC 35.9 3,483 35.9 3,483 35.9 3,483 KPLO-TV D13 DT LIC 8.1 12 8.1 12 8.1 12 KSFY-TV D13 DT LIC 12.2 13 12.2 13 12.2 13
------Interference to BLEDT20140929AOU LIC scenario 1
Call Chan Svc Status City, State File Number Distance Desired: KETA-TV D13 DT LIC OKLAHOMA CITY, OK BLEDT20140929AOU
Undesireds: WIBW-TV D13 DT BL TOPEKA, KS DTVBL63160 399.6 km WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW 399.6 KGEB D12 DT CP TULSA, OK BLANK0000029672 147.1 KXII D12 DT LIC SHERMAN, TX BLCDT20090226ACF 185.0 KUPK D13 DT LIC GARDEN CITY, KS BLCDT20090226ABS 363.9 KFJX D13 DT LIC PITTSBURG, KS BLCDT20110906AFG 307.4
Service area Terrain-limited IX-free, before IX-free, after Percent New IX 44633.3 1,702,441 42816.4 1,687,740 42488.1 1,684,734 42476.2 1,684,734 0.03 0.00
Undesired Total IX Unique IX, before Unique IX, after WIBW-TV D13 DT BL 79.6 105 47.7 30 WIBW-TV D13 DT APP 95.5 107 59.7 30 KGEB D12 DT CP 132.5 2,412 112.4 1,993 112.4 1,993 KXII D12 DT LIC 4.0 14 4.0 14 4.0 14 KUPK D13 DT LIC 84.2 115 80.2 107 80.2 107 KFJX D13 DT LIC 79.9 854 32.0 368 28.0 366
------Interference to proposal scenario 1 1.97% interference received
Table 1 WIBW-TV OET Bulletin 69 Interference Study (page 4 of 4)
Call Chan Svc Status City, State File Number Distance Desired: WIBW-TV D13 DT APP TOPEKA, KS WIBW-TV Prop 65.5 kW
Undesireds: WHO-DT D13 DT LIC DES MOINES, IA BLCDT20090410ASQ 373.5 km KFJX D13 DT LIC PITTSBURG, KS BLCDT20110906AFG 230.5 KHGI-TV D13 DT LIC KEARNEY, NE BLANK0000001675 302.6 KETA-TV D13 DT LIC OKLAHOMA CITY, OK BLEDT20140929AOU 399.6
Service area Terrain-limited IX-free Percent IX 42699.8 1,234,347 41118.8 1,162,507 40084.0 1,139,653 2.52 1.97
Undesired Total IX Unique IX Prcnt Unique IX WHO-DT D13 DT LIC 156.7 2,986 144.7 2,792 0.35 0.24 KFJX D13 DT LIC 357.1 18,076 337.4 17,889 0.82 1.54 KHGI-TV D13 DT LIC 525.1 1,981 517.1 1,963 1.26 0.17 KETA-TV D13 DT LIC 23.7 16 7.9 5 0.02 0.00
Channel and Section Question Response Facility Proposed Community of Facility ID 63160 Information License State Kansas
City TOPEKA
DTV Channel 13
Facility Type Facility Type Commercial
Station Type Main
Zone Zone 2
Antenna Location Section Question Response Data Antenna Structure Do you have an FCC Antenna Structure Registration (ASR) Yes Registration Number?
ASR Number 1032648
Coordinates (NAD83) Latitude 39° 00' 22.0" N+
Longitude 096° 02' 58.0" W-
Structure Type TOWER-A free standing or guyed struct
Overall Structure Height 380.7 meters
Support Structure Height 345.8 meters
Ground Elevation (AMSL) 396.2 meters
Antenna Data Height of Radiation Center Above Ground Level 353 meters
Height of Radiation Center Above Average Terrain 402.8 meters
Height of Radiation Center Above Mean Sea Level 749.2 meters
Effective Radiated Power 65.5 kW Antenna Section Question Response Technical Data Antenna Type Antenna Type Non-Directional
Do you have an Antenna ID?
Antenna ID
Antenna Manufacturer and Manufacturer: DIE Model Model THV-10A13/VP-R O4
Rotation
Electrical Beam Tilt 1
Mechanical Beam Tilt Not Applicable
toward azimuth
Polarization Elliptical
DTV and DTS: Elevation Does the proposed antenna propose elevation radiation No Pattern patterns that vary with azimuth for reasons other than the use of mechanical beam tilt?
Uploaded file for elevation antenna (or radiation) pattern data Construction Section Question Response Permit Post-Incentive Auction It will operate on the DTV channel for this station as Yes Certifications Expedited Processing established in the post-incentive auction channel reassignment public notice.
It will operate post-incentive auction facilities that do not No expand the noise-limited service contour in any direction beyond that established by the post-incentive auction channel reassignment public notice.
It will operate post-incentive auction facilities that match or Yes reduce by no more than five percent with respect to predicted population from those defined in the post-incentive auction channel reassignment public notice.
The antenna structure to be used by this facility has been Yes registered by the Commission and will not require re- registration to support the proposed antenna, OR the FAA has previously determined that the proposed structure will not adversely affect safety in air navigation and this structure qualifies for later registration under the Commission's phased registration plan, OR the proposed installation on this structure does not require notification to the FAA pursuant to 47 C.F.R. Section 17.7.
Environmental Effect Would a Commission grant of Authorization for this location No be an action which may have a significant environmental effect? (See Section 1.1306 of 47 C.F.R.)
Broadcast Facility The proposed facility complies with the applicable Yes engineering standards and assignment requirements of 47 C. F.R. Sections 73.616, 73.622(i), 73.623(e), 73.625, 73.1030, and 73.1125.