D:\KTFF\KTFF-DT Ch23 Porterville Engineering June 2017.Wpd

$D:\KTFF\KTFF-DT Ch23 Porterville Engineering June 2017.Wpd$

HATFIELD & DAWSON THOMAS M. E CKELS, PE CONSULTING ELECTRICAL ENGINEERS TELEPHONE (206) 783-9151 STEPHEN S. L OCKWOOD, PE 9500 G REENWOOD AVE. N. FACSIMILE (206) 789-9834 DAVID J. P INION, PE SEATTLE, WASHINGTON 98103 E-MAIL [email protected] ERIK C. S WANSON , PE MAURY L. H ATFIELD , PE THOMAS S. G ORTON, PE (1942-2009) MICHAEL H. M EHIGAN , PE PAUL W. LEONARD , PE (1925-2011) JAMES B. H ATFIELD, PE BENJAMIN F. D AWSON III, PE CONSULTANTS

Engineering Statement Post-Auction Technical Facilities for KTFF-DT Channel 23 at Porterville, CA June 2017

Repack Application This Engineering Statement has been prepared on behalf of Unimas Fresno LLC (“Unimas”), licensee of digital television station KTFF-DT at Porterville, California. KTFF-DT presently operates on Channel 48. The instant application is being filed in response to the Commission’s Channel Reassignment Public Notice (DA 17-314), released on April 13, 2017, specifying the station’s post- auction facilities on Channel 23.

The following table lists the KTFF-DT assigned post-auction facilities, as well as the requested facilities as proposed in this Form 2100 application:

Technical Parameters from Technical Parameters from Post Auction Table Proposed Form 2100

Channel 23 23

ERP 119 kW 119 kW

HAAT 804 meters 804 meters

Antenna ID #38166 DIE TFU-10DSC-R C170 directional directional

Coordinates (NAD83) 36-17-14 36-17-13.5 118-50-20 118-50-19.0 KTFF-DT Porterville (June 2017) Page 2

Interference Study The proposed technical facilities utilize an antenna pattern which is essentially identical to the licensed KTFF-DT pattern, but with slight variation. Additionally, the tower site coordinates are being corrected as a part of this application. Therefore, an interference study has been conducted using the Commission’s TVStudy software. The results of that study demonstrate that this proposal will have no additional interference impact on other stations, and will not expand the service area more than 1% beyond the baseline.

Study created: 2017.06.01 15:45:42

Study build station data: LMS TV 2017-05-30 (16)

Proposal: KTFF-DT D23 DT APP PORTERVILLE, CA File number: KTFFFIX Facility ID: 35512 Station data: User record Record ID: 26 Country: U.S. Zone: II

Stations potentially affected:

Call Chan Svc Status City, State File Number Distance KNXT D22 DT BL VISALIA, CA DTVBL16950 0.0 km KQCA D23 DT APP STOCKTON, CA BLANK0000024621 321.5 KQCA D23 DT BL STOCKTON, CA DTVBL10242 321.4 KVMD D23 DT LIC TWENTYNINE PALMS, CA BLCDT20060615AAB 310.4 KVMD D23 DD APP TWENTYNINE PALMS, CA BPCDT20100325ACD 310.9 KRXI-TV D23 DT BL RENO, NV DTVBL48360 379.3 KPXN-TV D24 DT BL SAN BERNARDINO, CA DTVBL58978 241.1

No non-directional AM stations found within 0.8 km

No directional AM stations found within 3.2 km

Record parameters as studied:

Channel: D23 Latitude: 36 17 14.00 N (NAD83) Longitude: 118 50 20.00 W Height AMSL: 1763.0 m HAAT: 804.0 m Peak ERP: 119 kW Antenna: DIE-TFU-10DSC-R C170 0.0 deg

39.7 dBu contour: Azimuth ERP HAAT Distance 0.0 deg 51.8 kW 782.3 m 103.8 km 45.0 5.25 106.7 51.1 90.0 4.76 86.4 48.1 135.0 63.4 801.2 106.4 180.0 119 1056.8 119.8 225.0 97.5 1139.4 120.0

Hatfield & Dawson Consulting Engineers KTFF-DT Porterville (June 2017) Page 3

270.0 98.5 1307.8 125.1 315.0 119 1076.2 120.3

Database HAAT does not agree with computed HAAT Database HAAT: 804 m Computed HAAT: 795 m

Proposal service area is within baseline plus 1.0% Proposal service area population is more than 95.0% of baseline

Distance to Canadian border: 1381.2 km

Distance to Mexican border: 429.9 km

Conditions at FCC monitoring station: Livermore CA Bearing: 302.6 degrees Distance: 304.1 km

Proposal is not within the West Virginia quiet zone area

Conditions at Table Mountain receiving zone: Bearing: 66.1 degrees Distance: 1259.1 km

Study cell size: 2.00 km Profile point spacing: 1.00 km

Maximum new IX to full-service and Class A: 0.50% Maximum new IX to LPTV: 2.00%

No IX check failures found.

Hatfield & Dawson Consulting Engineers KTFF-DT Porterville (June 2017) Page 4

Facilities Proposed The proposed operation will be on Channel 23 with a maximum lobe effective radiated power of 119 kilowatts. Operation is proposed with a Dielectric model TFU-10DSC-R C170 antenna, which will be mounted on an existing tower at the Blue Ridge communications site. An FCC Antenna Structure Registration Number is not required for this tower.

RF Exposure Calculations The power density calculations shown below were made using the techniques outlined in OET Bulletin No. 65. "Ground level" calculations in this report have been made at a reference height of 2 meters above ground to provide a worst-case estimate of exposure for persons standing on the ground in the vicinity of the tower. The equation shown below was used to calculate the ground level power density figures from each antenna.

2 3340981.()× AdjERP Watts S(/)µ W cm = D2 Where: AdjERP(Watts) is the maximum lobe effective radiated power times the element pattern factor times the array pattern factor.

D is the distance in meters from the center of radiation to the calculation point.

Power density levels produced by the proposed facility were calculated for an elevation of 2 meters above ground using the manufacturer’s vertical plane pattern for the Dielectric TFU- 10DSC-R C170 antenna. The highest calculated power density from the proposed antenna alone occurs at at a point 11 meters from the base of the antenna support structure. At this point the power density is calculated to be 105.3 µW/cm², which is 30% of 349.3 µW/cm² (the FCC maximum for uncontrolled environments at the Channel 23 frequency).

There are a number of other FM and TV stations at the Blue Ridge communications site, including one other full-power station which will be changing channel as a part of the repack. This application proposes replacement of the existing KTFF-DT antenna with an equivalent model, with a change in channel and reduction in main lobe ERP from 197 kW to 119 kW. Measurements conducted in connection with the KTFF-DT renewal application in 2006 (see

Hatfield & Dawson Consulting Engineers KTFF-DT Porterville (June 2017) Page 5

BRCT-20060804AFV) found a maximum reading of 40% of the uncontrolled environment MPE, with the majority of readings being 20% or less of the uncontrolled environment MPE. At that time, analog KTFF-TV was still operating on channel 61 with 2400 kW ERP. The analog operation has long since shut down, and it is anticipated that the total site exposure resulting from the instant proposal would be found to be commensurately lower than what was measured in 2006.

Pursuant to OET Bulletin No. 65, all station personnel and contractors are required to follow appropriate safety procedures before any work is commenced on the antenna tower, including reduction in power or discontinuance of operation before any maintenance work is undertaken. The permittee/licensee in coordination with other users of the site must reduce power or cease operation as necessary to protect persons having access to the site, tower or antenna from radiofrequency exposure in excess of FCC guidelines.

Hatfield & Dawson Consulting Engineers KTFF-DT Ch23 Porterville Ground-Level Power Density Calculations Using Manufacturer's Vertical Plane Pattern

Antenna TFU-10DSC-R C170 ERP 119000 Watts H (avg) 0 Watts V (avg) Antenna AGL 21 meters less 2m is 19 meters above the reference plane

Calculated Maximum is 105.32 uW/cm² at 11 meters from the tower

120

100

2 80

Power Density Density Power uW/cm 40

0 0 200 400 600 800 1000 Distance in meters

Distance Depression From Tower Hypotenuse Angle Interp Adjusted ERP Power Density (meters) (meters) (degrees) Rel Field (watts) uW/cm² 0 19.00 90.00 0.001 0.1 0.01 1 19.03 86.99 0.011 14.6 1.35 2 19.10 83.99 0.030 107.6 9.84 3 19.24 81.03 0.051 307.2 27.74 4 19.42 78.11 0.068 557.5 49.40 5 19.65 75.26 0.077 700.9 60.66 6 19.92 72.47 0.070 580.5 48.86 7 20.25 69.78 0.047 257.6 20.99 8 20.62 67.17 0.029 100.1 7.87 9 21.02 64.65 0.060 426.8 32.26 10 21.47 62.24 0.096 1093.5 79.25 11 21.95 59.93 0.113 1519.5 105.32 12 22.47 57.72 0.105 1318.1 87.20 13 23.02 55.62 0.079 743.7 46.88 14 23.60 53.62 0.058 401.4 24.08 15 24.21 51.71 0.059 416.5 23.75 16 24.84 49.90 0.064 482.8 26.14 17 25.50 48.18 0.056 374.2 19.24 18 26.17 46.55 0.048 279.4 13.63 19 26.87 45.00 0.059 414.2 19.17 20 27.59 43.53 0.080 763.4 33.52 21 28.32 42.14 0.092 1011.0 42.12 22 29.07 40.82 0.088 917.0 36.25 23 29.83 39.56 0.069 569.7 21.39 24 30.61 38.37 0.044 231.3 8.25 25 31.40 37.23 0.028 90.5 3.07 26 32.20 36.16 0.033 126.3 4.07 27 33.02 35.13 0.042 207.8 6.37 28 33.84 34.16 0.042 211.5 6.17 29 34.67 33.23 0.030 110.5 3.07 30 35.51 32.35 0.018 38.0 1.01 31 36.36 31.50 0.027 89.2 2.25 32 37.22 30.70 0.053 335.7 8.10 33 38.08 29.93 0.081 785.8 18.11 34 38.95 29.20 0.105 1324.1 29.16 35 39.82 28.50 0.122 1773.7 37.36 36 40.71 27.82 0.133 2095.6 42.25 37 41.59 27.18 0.135 2177.6 42.05 38 42.49 26.57 0.130 2021.8 37.42 39 43.38 25.97 0.122 1780.9 31.62 40 44.28 25.41 0.108 1377.8 23.47 41 45.19 24.86 0.093 1030.3 16.86 42 46.10 24.34 0.078 722.0 11.35 43 47.01 23.84 0.066 511.8 7.74 44 47.93 23.36 0.058 404.9 5.89 45 48.85 22.89 0.053 335.7 4.70 46 49.77 22.44 0.054 341.3 4.60 47 50.70 22.01 0.054 346.9 4.51 48 51.62 21.60 0.053 336.7 4.22 49 52.55 21.19 0.052 326.6 3.95 50 53.49 20.81 0.048 277.9 3.25 51 54.42 20.43 0.041 202.2 2.28 52 55.36 20.07 0.034 140.5 1.53 53 56.30 19.72 0.025 75.7 0.80 54 57.25 19.38 0.016 29.6 0.30 55 58.19 19.06 0.007 5.2 0.05 56 59.14 18.74 0.018 37.2 0.36 57 60.08 18.43 0.033 127.1 1.18 58 61.03 18.14 0.047 265.5 2.38 59 61.98 17.85 0.062 452.0 3.93 60 62.94 17.57 0.076 684.9 5.78 61 63.89 17.30 0.090 956.9 7.83 62 64.85 17.04 0.103 1264.3 10.05 63 65.80 16.78 0.113 1532.4 11.82 64 66.76 16.53 0.123 1804.5 13.53 65 67.72 16.29 0.133 2090.2 15.23 66 68.68 16.06 0.142 2388.1 16.91 67 69.64 15.83 0.147 2560.4 17.64 68 70.60 15.61 0.150 2685.5 18.00 69 71.57 15.40 0.154 2810.2 18.33 70 72.53 15.19 0.157 2934.2 18.63 71 73.50 14.98 0.160 3035.9 18.78 72 74.46 14.78 0.157 2923.6 17.62 73 75.43 14.59 0.154 2816.1 16.54 74 76.40 14.40 0.151 2713.3 15.53 75 77.37 14.22 0.148 2615.0 14.59 76 78.34 14.04 0.146 2520.8 13.72 77 79.31 13.86 0.139 2290.8 12.17 78 80.28 13.69 0.131 2043.8 10.59 79 81.25 13.52 0.124 1816.3 9.19 80 82.23 13.36 0.116 1607.1 7.94 81 83.20 13.20 0.109 1415.1 6.83 82 84.17 13.05 0.102 1239.4 5.84 83 85.15 12.89 0.093 1036.0 4.77 84 86.12 12.75 0.084 838.7 3.78 85 87.10 12.60 0.075 666.0 2.93 86 88.07 12.46 0.066 516.3 2.22 87 89.05 12.32 0.057 388.3 1.64 88 90.03 12.18 0.049 280.7 1.16 89 91.01 12.05 0.040 192.3 0.78 90 91.98 11.92 0.037 165.7 0.65 91 92.96 11.79 0.038 170.3 0.66 92 93.94 11.67 0.038 174.8 0.66 93 94.92 11.55 0.039 179.3 0.66 94 95.90 11.43 0.039 183.7 0.67 95 96.88 11.31 0.040 188.1 0.67 96 97.86 11.20 0.040 192.5 0.67 97 98.84 11.08 0.041 196.8 0.67 98 99.82 10.97 0.043 215.8 0.72 99 100.81 10.86 0.049 282.8 0.93 100 101.79 10.76 0.055 357.3 1.15