Source: https://www.law.cornell.edu/cfr/text/47/74.1204
Timestamp: 2017-06-29 16:11:18
Document Index: 198871800

Matched Legal Cases: ['art 74', '§ 73', '§ 73', '§ 73', '§ 73', '§ 73', '§ 73', '§ 74', '§ 73', '§ 74']

47 CFR 74.1204 - Protection of FM broadcast, FM Translator and LP100 stations. | US Law | LII / Legal Information Institute
CFR › Title 47 › Chapter I › Subchapter C › Part 74 › Subpart L › Section 74.1204 47 CFR 74.1204 - Protection of FM broadcast, FM Translator and LP100 stations.
Frequency separation Interference contour of proposed translator station Protected contour of commercial Class B station Co-channel
0.5 mV/m (54 dBu) 200 kHz
0.5 mV/m (54 dBu) 400 kHz/ 600 kHz
50.0 mV/m (94 dBu)
Frequency separation Interference contour of proposed translator station Protected contour of commercial Class B1 station Co-channel
0.7 mV/m (57 dBu) 200 kHz
0.5 mV/m (57 dBu) 400 kHz/ 600 kHz
70.0 mV/m (97 dBu)
Frequency separation Interference contour of proposed translator Protected contour of any other station Co-channel
1 mV/m (60 dBu) 200 kHz
1 mV/m (60 dBu) 400 kHz/ 600 kHz
(1) The distances to the protected contours are computed using Figure 1 of § 73.333 [F(50,50) curves] of this chapter.
(2) The distances to the interference contours are computed using Figure 1a of § 73.333 [F(50,10) curves] of this chapter. In the event that the distance to the contour is below 16 kilometers (approximately 10 miles), and therefore not covered by Figure 1a, curves in Figure 1 must be used.
(4) The antenna height to be used is the height of the radiation center above the average terrain along each pertinent radial, determined in accordance with § 73.313(d) of this chapter.
(g) An application for an FM translator or an FM booster station that is 53 or 54 channels removed from an FM radio broadcast station will not be accepted for filing if it fails to meet the required separation distances set out in § 73.207 of this chapter. For purposes of determining compliance with § 73.207 of this chapter, translator stations will be treated as Class A stations and booster stations will be treated the same as their FM radio broadcast station equivalents. FM radio broadcast station equivalents will be determined in accordance with §§ 73.210 and 73.211 of this chapter, based on the booster station's ERP and HAAT. Provided, however, that FM translator stations and booster stations operating with less than 100 watts ERP will be treated as class D stations and will not be subject to intermediate frequency separation requirements.
(h) An application for an FM translator station will not be accepted for filing if it specifies a location within 320 kilometers (approximately 199 miles) of either the Canadian or Mexican borders and it does not comply with § 74.1235(d) of this part.
(i) FM booster stations shall be subject to the requirement that the signal of any first adjacent channel station must exceed the signal of the booster station by 6 dB at all points within the protected contour of any first adjacent channel station, except that in the case of FM stations on adjacent channels at spacings that do not meet the minimum distance separations specified in § 73.207 of this chapter, the signal of any first adjacent channel station must exceed the signal of the booster by 6 dB at any point within the predicted interference free contour of the adjacent channel station.
(j) FM translator stations authorized prior to June 1, 1991 with facilities that do not comply with the predicted interference protection provisions of this section, may continue to operate, provided that operation is in conformance with § 74.1203 regarding actual interference. Applications for major changes in FM translator stations must specify facilities that comply with provisions of this section.
[ 55 FR 50694, Dec. 10, 1990, as amended at 56 FR 56170, Nov. 1, 1991; 58 FR 42025, Aug. 6, 1993; 65 FR 7649, Feb. 15, 2000; 65 FR 67304, Nov. 9, 2000; 65 FR 79780, Dec. 20, 2000]
47 CFR 74.1235 — Power Limitations and Antenna Systems.
47 CFR 74.1205 — Protection of Channel 6 TV Broadcast Stations.