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stations Nos 2 and 3 are less than 50 of the 1 21 mV m limitation under the above provision they are nevertheless included for comparative studies and the RSS limitation is calculated to be 1 47 mV m However if the increase proposed by Station No 1 is authorized the RSS value then calculated is 1 21 mV m because Statio... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
be less than the following Effective Class of station field at 1 km All Class A except Alaskan 275 mV m Class A Alaskan B and D 215 mV m Class C 180 mV m Note 1 When a directional antenna is employed the radiated signal of a broadcasting station will vary in strength in different directions possibly being greater than ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
for 50 percent of the time 2 Ten percent skywave field strength values In computing the 10 skywave field strength for stations on a single signal or an RSS basis Formula 2 in 73 190 shall be used 3 Determination of angles of departure In calculating skywave field strength for stations on all channels the pertinent vert... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 182 r Radio Broadcast Services Note SC Same channel AC Adjacent channel SW Skywave GW Groundwave r The following table of logarithmic expressions is to be used as required for determining the minimum permissible ratio of the field strength of a desired to an undes... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
be operated synchronously when the carriers are maintained within 0 2 Hz of each other and they transmit identical program s 56 FR 64862 Dec 12 1991 57 FR 43290 Sept 18 1992 as amended at 58 FR 27950 May 12 1993 81 FR 2759 Jan 19 2016 73 183 Groundwave signals a Interference that may be caused by a proposed assignment ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
broadcast signal traversing the terrain involved Figure M3 See Note 1 shows the conductivity throughout the United States by general areas of reasonably uniform conductivity When it is clear that only one conductivity value is involved Figure R3 of 73 190 may be used It is a replica of Figure M3 and is contained in the... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
conductivity at the site of each station and along the intervening terrain is 6 mS m The protection to Class B stations during daytime is to the 500 µV m 0 5 Vm contour using a 6 dB protection factor The distance to the 500 µV m groundwave contour of the 1 kW station is determined by the use of the appropriate curve in... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
may be expected in determining field strengths at a distance from the antenna by application of the equivalent distance method when the unattenuated field of the antenna the various ground conductivities and the location of discontinuities are known This method considers a wave to be propagated across a given conductiv... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
at a distance of 20 kilometers on the curve for 10 mS m the field strength is found to be 2 84 mV m On the 5mS m curve the equivalent distance to this field strength is 14 92 kilometers which is 5 08 20 14 92 kilometers nearer to the transmitter Continuing on the propagation curve the distance to a field strength of 0 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
of the electric field which has not been reflected from the ionosphere nor from the troposphere These 20 families of curves are plotted on log log graph paper and each is to be used for the range of frequencies shown thereon Computations are based on a dielectric constant of the ground referred to air as unity equal to... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
of 2700 mV m at 1 kilometer simply multiply the values given on the charts by 27 The value of the inverse distance field to be used for a particular antenna depends upon the power input to the antenna the nature of the ground in the neighborhood of the antenna and the geometry of the antenna For methods of calculating ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
used to determine the dielectric constant of the ground the ground conductivity and the inverse distance field strength at 1 kilometer Graph 21 gives the relative values of groundwave field strength over a plane earth as a function of the numerical distance p and phase angle b On graph paper with coordinates similar to... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
the ground conductivity and dielectric constant R λ 1 Number of wavelengths in 1 kilometer fMHz frequency expressed in megahertz ε dielectric constant on the ground referred to air as unity First solve for χ by substituting the known values of p1 R λ 1 and cos b in equation 1 Equation 2 may then be solved for δ and equ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
at 1 kilometer and the value of b Then superimpose the log log graph paper over Graph 21 shifting it vertically until both inverse distance lines coincide and shifting it horizontally until the numerical distance at 1 kilometer on Graph 21 coincides with 1 kilometer on the log log graph paper The curve of Graph 21 corr... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
that calculated pursuant to 73 150 or 73 152 depending on whether the station has a standard or modified standard pattern 3 In the case of calculation of interference or overlap to not from a foreign station the notified radiation shall be used even if the notified radiation differs from that in paragraphs a 1 or 2 of ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
N and 93 32 54 W The critical angles of radiation as determined from Figure 6a of 73 190 for use with Class B stations are 9 6 and 16 6 If the vertical pattern of the antenna of the proposed station in the direction of the existing station is such that between the angles of 9 6 and 16 6 above the horizon the maximum ra... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
restricted to that just described each such case will be considered on the basis of the best knowledge available f In performing calculations to determine permissible radiation from stations operating presunrise or postsunset in accordance with 73 99 calculated diurnal factors will be multiplied by the values of skywav... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
5 2151 0737 4167 1413 25 2027 2560 7269 2577 SR 1504 2325 5374 1729 25 1057 2092 4148 1239 5 0642 1295 2583 0699 75 0446 1002 1754 0405 1 0148 0135 0462 0010 ii Postsunset Constants Tmp a b c d 1 75 9495 0187 0720 0290 1 5 7196 3583 2280 0611 1 25 6756 1518 0279 0163 1 0 5486 1401 0952 0288 75 3003 4050 0961 0256 5 118... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
path g Figure 2 of 73 190 10 percent Skywave Signal Range Chart shows the signal as a function of the latitude of the transmission path which is defined as the geographic latitude of the midpoint between the transmitter and receiver When using Figure 2 of 73 190 latitude 35 should be used in case the mid point of the p... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
from the antenna and a few additional measurements if needed at greater distances from the antenna Where the antenna is rurally located and unobstructed measurements can be made there shall be at least 15 measurements on each radial These shall include at least 7 measurements within 3 kilometers of the antenna However ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
20 2024 47 CFR 73 186 a 4 Radio Broadcast Services matching the points is found This curve should then be drawn on the sheet on which the points were plotted together with the inverse distance curve corresponding to that curve The field at 1 kilometer for the radial concerned shall be the ordinate on the inverse distan... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
radial and the field strength pattern 5 The antenna resistance at the operating frequency 6 Antenna current or currents maintained during field strength measurements c Maps showing each measurement point numbered to agree with the required tabulation shall be retained in the station records and shall be available to th... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
D stations authorized before November 30 1959 subsequent changes of facilities which do not involve a change in frequency an increase in radiation toward any point on the 0 1 mV m contour of a co channel U S Class A station or the move of transmitter site materially closer to the 0 1 mV m contour of such Class A statio... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
1580 kHz obtain in a similar manner the proper radiation values from the 1000 and 1600 kHz charts Figures 10 and 11 of 73 190 multiply each of these values by the appropriate interpolation factors in the K 1000 and K 1600 columns in paragraph c of this section and add the products c Interpolation factors 1 Frequencies ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
167 1110 0 817 0 183 1120 0 800 0 200 1130 0 783 0 217 1140 0 767 0 233 1160 0 733 0 267 1170 0 717 0 283 1180 0 700 0 300 1190 0 683 0 317 1200 0 667 0 333 1210 0 650 0 350 1220 0 633 0 367 1500 0 167 0 833 1510 0 150 0 850 1520 0 133 0 867 47 CFR 73 187 c 2 enhanced display page 83 of 580 47 CFR Part 73 up to date as... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
system meets the minimum requirements with respect to field strength before favorable consideration will be given thereto See 73 186 In the event it is proposed to make substantial changes in an existing antenna system the changes shall be such as to meet the minimum height requirements or will be permitted subject to ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
efficiency and where the height of the building is in the order of a quarter wave the efficiency may be materially reduced 47 CFR 73 189 b 3 enhanced display page 84 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 189 b 4 Radio Broadcast Services 4 At the present development of the art it is considered that ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
a perfect antenna of the height specified by Figure 7 of 73 190 for operation on frequencies below 1000 kHz and in the case of a Class B or Class D station less than 90 percent of the ground wave field which would be obtained from a perfect antenna of the height specified by Figure 7 of 73 190 for operation on frequenc... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
cos aR cos bR bT degrees Eq 5 Where aT is the geographic latitude of the transmitting terminal degrees aR is the geographic latitude of the receiving terminal degrees bT is the geographic longitude of the transmitting terminal degrees bR is the geographic longitude of the receiving terminal degrees aM is the geographic... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
using the formulas shown above and values obtained directly from the figures the computed values will control 47 CFR 73 190 e enhanced display page 87 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 190 e Radio Broadcast Services 47 CFR 73 190 e enhanced display page 88 of 580 47 CFR Part 73 up to date as of... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
e enhanced display page 96 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 190 e Radio Broadcast Services 47 CFR 73 190 e enhanced display page 97 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 190 e Radio Broadcast Services 47 CFR 73 190 e enhanced display page 98 of 580 47 CFR Part 73 up to dat... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
207 89 5 208 89 7 209 89 9 210 90 1 211 90 3 212 90 5 213 90 7 214 90 9 215 91 1 216 91 3 217 91 5 218 91 7 219 91 9 220 92 1 221 92 3 222 92 5 223 92 7 224 92 9 225 93 1 226 93 3 227 93 5 228 93 7 229 93 9 230 47 CFR 73 201 enhanced display page 101 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 201 Radio ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
104 9 285 105 1 286 105 3 287 105 5 288 105 7 289 105 9 290 106 1 291 106 3 292 106 5 293 106 7 294 106 9 295 107 1 296 107 3 297 107 5 298 107 7 299 107 9 300 NOTE The frequency 108 0 MHz may be assigned to VOR test stations subject to the condition that interference is not caused to the reception of FM broadcasting s... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
of this chapter request that a nonreserved FM channel channels 221 through 300 be allotted as reserved only for noncommercial educational broadcasting by demonstrating the following i No reserved channel can be used without causing prohibited interference to TV channel 6 stations or foreign broadcast stations or ii The... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
280B Firebaugh 234A Ford City 271A Ft Bragg 253B1 Kettleman City 299A Lindsay 277B1 Ludlow 261B1 Portola 258A Randsburg 275A Sacramento 300B Tecopa 256A Visalia 241A 47 CFR 73 202 b enhanced display page 105 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 202 b Radio Broadcast Services Channel No Wasco 224A ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
MONTANA Cut Bank 265C2 Valler 289C1 NEBRASKA Bayard 251A NEVADA Caliente 264A Owyhee 247C1 Tonopah 224A NEW HAMPSHIRE Enfield 282A Groveton 268A Jefferson 247A Stratford 254A NEW JERSEY NEW MEXICO Animas 279C1 Carrizozo 261C2 Chama 241C3 Clovis 272C3 Des Moines 287C Lovington 269C3 Skyline Ganipa 240A NEW YORK Keesevil... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
McLean 298C3 Memphis 292A Menard 265A 292A Milano 274A Mullin 224A 277A 47 CFR 73 202 b enhanced display page 110 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 202 b Radio Broadcast Services Channel No Munday 270C1 O Donnell 249A Olney 282A Palacios 259C1 Pearsall 277A Premont 264C3 287A Richland Springs 2... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
the List of CFR Sections Affected which appears in the Finding Aids section of the printed volume and at www govinfo gov 73 203 Availability of channels a Except as provided for in paragraph b of this section and 1 401 d of this chapter and 73 3573 a 1 applications may be filed to construct new FM broadcast stations on... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
confines of the following lines drawn on the United States Albers Equal Area Projection Map based on standard parallels 291 2 and 451 2 North American datum Beginning at the most easterly point on the State boundary line between North Carolina and Virginia thence in a straight line to a point on the Virginia West Virgi... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
II consists of Alaska Hawaii and the rest of the United States which is not located in either Zone I or Zone I A 29 FR 14116 Oct 14 1964 and 31 FR 10125 July 27 1966 as amended at 48 FR 29504 June 27 1983 73 207 Minimum distance separation between stations a Except for assignments made pursuant to 73 213 or 73 215 FM a... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
under consideration the second 400 kHz above and below the third 600 kHz above and below the fifty third 10 6 MHz above and below and the fifty fourth 10 8 MHz above and below The distances in the Tables apply regardless of whether the proposed station class appears first or second in the Relation column of the table 1... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
B1 to C0 248 154 180 112 87 54 27 17 B1 to C 259 161 193 120 105 65 31 19 B to B 241 150 169 105 74 46 20 12 B to C3 211 131 145 90 71 44 17 11 B to C2 241 150 169 105 74 46 20 12 B to C1 270 168 195 121 79 49 27 17 B to C0 272 169 214 133 89 55 31 19 B to C 274 170 217 135 105 65 35 22 C3 to C3 153 95 99 62 43 27 14 9... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
from Canadian allotments and assignments by not less than the distance given in Table 2 to this paragraph b using the distance calculation methodology set out in the Agreement When applying Table 2 U S Class C0 allotments and assignments are considered to be Class C U S Class C2 allotments and assignments are considere... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
113 48 3 Mexican border distance separation Under the 1992 United States Mexico FM Broadcasting Agreement any domestic U S assignment or allotment within 320 kilometers 199 miles of the common border must either satisfy the contour overlap provisions set out in section 7 3 of the Agreement or be separated from Mexican ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
or 600 kHz 10 6 or 10 8 MHz I F A to A 100 61 25 8 A to AA 111 68 31 9 A to B1 138 88 48 11 A to B 163 105 65 14 A to C1 196 129 74 21 A to C 210 161 94 28 AA to AA 115 72 31 10 AA to B1 143 96 48 12 AA to B 178 125 69 15 AA to C1 200 133 75 22 AA to C 226 165 95 29 B1 to B1 175 114 50 14 B1 to B 211 145 71 17 B1 to C1... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
amended at 49 FR 10264 Mar 20 1984 49 FR 19670 May 9 1984 49 FR 50047 Dec 26 1984 51 FR 26250 July 22 1986 54 FR 14963 Apr 14 1989 54 FR 16366 Apr 24 1989 54 FR 19374 May 5 1989 54 FR 35338 Aug 25 1989 56 FR 27426 June 14 1991 56 FR 57293 Nov 8 1991 62 FR 50256 Sept 25 1997 65 FR 79776 Dec 20 2000 87 FR 15342 Mar 18 20... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
made indicating adequate distance between suitable transmitter sites for all communities 3 Petitions to amend the Table of Allotments that do not meet minimum distance separation requirements to transmitter sites specified in pending applications will not be considered unless they are filed no later than 47 CFR 73 208 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
The counterproponent is required to make a showing that at the time it filed the counterproposal it did not know and could not have known by exercising due diligence of the pendency of the conflicting FM application b Station separations in licensing proceedings shall be determined by the distance between the coordinat... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
display page 119 of 580 47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 208 c 2 Radio Broadcast Services 2 Calculate the middle latitude between the two reference points by averaging the two latitudes as follows ML LAT1dd LAT2dd 2 3 Calculate the number of kilometers per degree latitude difference for the middle la... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
FR 14116 Oct 14 1964 48 FR 29505 June 27 1983 52 FR 37788 Oct 9 1987 52 FR 39920 Oct 26 1987 54 FR 9806 Mar 8 1989 57 FR 36020 Aug 12 1992 58 FR 38537 July 19 1993 73 209 Protection from interference a Permittees and licensees of FM broadcast stations are not protected from any interference which may be caused by the g... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
station classes are indicated in the Table of Allotments 73 202 Class A B1 and B stations may be authorized in Zones I and I A Class A C3 C2 C1 C0 and C stations may be authorized in Zone II b The power and antenna height requirements for each class are set forth in 73 211 If a station has an ERP and an antenna HAAT su... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
to 92 km the station is Class C 4 For a station in Puerto Rico or the Virgin Islands i If this distance is less than or equal to 42 km the station is Class A ii If this distance is greater than 42 km and less than or equal to 46 km the station is Class B1 iii If this distance is greater then 46 km and less than or equa... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
of at least 451 meters 1480 feet 3 Stations of any class except Class A may have an ERP less than that specified in paragraph a 1 of this section provided that the reference distance determined in accordance with paragraph b 1 i of this section exceeds the distance to the class contour for the next lower class Class A ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
CFR Part 73 up to date as of 2 20 2024 47 CFR 73 211 b 1 ii Radio Broadcast Services ii If a station s ERP is equal to the maximum for its class its antenna HAAT must not exceed the reference HAAT regardless of the reference distance For example a Class A station operating with 6 kW ERP may have an antenna HAAT of 100 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
that do not conform to the requirements of this section may continue to operate as authorized Stations operating with facilities in excess of those specified in paragraph b of this section may not increase their effective radiated powers or extend their 1 mV m field strength contour beyond the location permitted by the... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
nearest meter 28 FR 13623 Dec 14 1963 as amended at 48 FR 29506 June 27 1983 73 213 Grandfathered short spaced stations a Stations at locations authorized prior to November 16 1964 that did not meet the separation distances required by 73 207 and have remained continuously short spaced since that time may be modified o... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
channel interference is predicted to exist for the purpose of this section at all locations where the undesired interfering station F 50 10 field strength exceeds a value 20 dB below the desired service F 50 50 field strength of the station being considered e g where the protected field strength is 60 dBu the interferi... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
section adequate service is defined as 5 or more aural services AM or FM 3 For co channel and first adjacent channel stations a copy of any application proposing interference caused in any areas where interference is not currently caused must be served upon the licensee s of the affected short spaced station s 4 For st... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
of this section only with respect to such short spacing No other stations will be authorized pursuant to these paragraphs 1 Applications for authorization under requirements equivalent to those of prior rules Each application for authority to operate a Class A station with no more than 3000 watts ERP and 100 meters ant... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
47 CFR Part 73 up to date as of 2 20 2024 47 CFR 73 213 c 2 Radio Broadcast Services Relation Co channel 200 kHz 400 600 kHz 10 6 10 8 MHz A to C2 163 101 105 65 55 34 14 9 A to C1 196 122 129 80 74 46 21 13 A to C 222 138 161 100 94 58 28 17 2 Applications for authorization of Class A facilities greater than 3 000 wat... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
protection for short spaced assignments The Commission will accept applications that specify short spaced antenna locations locations that do not meet the domestic co channel and adjacent channel minimum distance separation requirements of 73 207 Provided That such applications propose contour protection as defined in ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
F 50 50 field strength along the protected contour for which overlap is prohibited For first adjacent channel stations 200 kHz the F 50 10 field strength along the interfering contour is 6 dB lower than the F 50 50 field strength along the protected contour for which overlap is prohibited For both second 47 CFR 73 215 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
54 104 64 Maximum permitted facilities assumed for each station pursuant to 47 CFR 73 211 b 3 6 kW ERP 240 meters HAAT Class A 25 kW ERP 150 meters HAAT Class B1 50 kW ERP 472 meters HAAT Class B b Applicants requesting short spaced assignments pursuant to this section must take into account the following factors in de... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
authorization pursuant to this section contours are based on the presumed use of the maximum ERP for the applicable station class as specified in 73 211 and the antenna HAATs in the directions of concern that would result from a non directional antenna mounted at a standard eight radial antenna HAAT equal to the refere... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
HAAT For applications to continue operation with an ERP that exceeds the maximum ERP permitted by 73 211 for the standard eight radial HAAT employed if processing is requested under this section contours are based on the presumed use of the maximum ERP for the applicable station class as specified in 73 211 and antenna... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
Co Channel 200 kHz 400 600 kHz A to A 92 57 49 30 25 16 A to B1 119 74 72 45 42 26 A to B 143 89 96 60 63 39 A to C3 119 74 72 45 36 22 A to C2 143 89 89 55 49 30 A to C1 178 111 111 69 69 43 A to C0 193 120 130 81 80 50 A to C 203 126 142 88 89 55 B1 to B1 143 89 96 60 44 27 B1 to B 178 111 114 71 65 40 B1 to C3 143 8... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
CFR 73 220 Radio Broadcast Services Relation Co Channel 200 kHz 400 600 kHz C1 to C1 224 139 158 98 76 47 C1 to C0 239 148 176 109 88 55 C1 to C 249 155 188 117 99 61 C0 to C0 259 161 196 122 90 56 C0 to C 270 168 207 129 99 61 C to C 270 168 209 130 99 61 54 FR 9802 Mar 8 1989 as amended at 54 FR 35340 Aug 25 1989 56 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
term network organization means any organization originating program material with or without commercial messages and furnishing the same to stations interconnected so as to permit simultaneous broadcast by all or some of them However arrangements involving only stations under common ownership or only the rebroadcast b... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
determined by the indirect method in accordance with 73 267 c during the entire time the station is operated without the transmission line meter d If conditions beyond the control of the licensee prevent the restoration of the meter to service within the above allowed period an informal letter request in accordance wit... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
determine the power 3 The calibration must cover as a minimum the range from 90 to 105 of authorized power and the meter must provide clear indications which will permit maintaining the operating power within the prescribed tolerance or the meter shall be calibrated to read directly in power units c Indirect method The... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
the licensee must furnish the FCC and also retain with the station records the measurement data used as a basis for determining the value of F ii Using measurement data shown on the transmitter manufacturer s test data supplied to the licensee Provided That measurements were made at the authorized frequency and transmi... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
CFR Part 73 up to date as of 2 20 2024 47 CFR 73 295 Radio Broadcast Services 73 295 FM subsidiary communications services a Subsidiary communication services are those transmitted on a subcarrier within the FM baseband signal but do not include services which enhance the main program broadcast service or exclusively r... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
e The licensee or permittee must retain control over all material transmitted in a broadcast mode via the station s facilities with the right to reject any material that it deems inappropriate or undesirable 48 FR 28454 June 22 1983 as amended at 48 FR 44805 Sept 30 1983 49 FR 33663 Aug 15 1984 50 FR 32416 Aug 12 1985 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
less than eight directions may be used See 73 313 d Where circular or elliptical polarization is used the antenna height above average terrain must be based upon the height of the radiation of the antenna that transmits the horizontal component of radiation Antenna power gain The square of the ratio of the root mean sq... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
term effective radiated power means the product of the antenna power transmitter output power less transmission line loss times 1 The antenna power gain or 2 the antenna field gain squared Where circular or elliptical polarization is employed the term effective radiated power is applied separately to the horizontal and... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
emissions intended to be received by the general public Field strength The electric field strength in the horizontal plane Free space field strength The field strength that would exist at a point in the absence of waves reflected from the earth or other reflecting objects Frequency departure The amount of variation of ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
the center of the performing area Left or right stereophonic channel The left or right signal as electrically reproduced in reception of FM stereophonic broadcasts Main channel The band of frequencies from 50 to 15 000 Hz which frequency modulate the main carrier Pilot subcarrier A subcarrier that serves as a control s... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
FR 10575 Mar 21 1974 44 FR 36038 June 20 1979 48 FR 28454 June 22 1983 48 FR 29507 June 27 1983 48 FR 37216 Aug 17 1983 49 FR 45145 Nov 15 1984 57 FR 48333 Oct 23 1992 62 FR 51058 Sept 30 1997 73 311 Field strength contours a Applications for FM broadcast authorizations must show the field strength contours required by... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
are not published for the area in question the next best topographic information should be used Topographic data may sometimes be obtained from state and municipal agencies The data from the Sectional Aeronautical Charts including bench marks or railroad depot elevations and highway elevations from road maps may be use... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
All predictions of coverage made pursuant to this section shall be made without regard to interference and shall be made only on the basis of estimated field strengths b Predictions of coverage shall be made only for the same purposes as relate to the use of field strength contours as specified in 73 311 c In predictin... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
date as of 2 20 2024 47 CFR 73 313 d Radio Broadcast Services d The antenna height to be used with this chart is the height of the radiation center of the antenna above the average terrain along the radial in question In determining the average elevation of the terrain the elevations between 3 and 16 kilometers from th... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
kilometers portion of a radial extends over large bodies of water or foreign territory only that part of the radial extending from 3 kilometers to the outermost portion of land in the United States covered by the radial used must be used in the computation of antenna height above average terrain 3 The profile graph for... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
may be obtained by averaging a large number of equally spaced points by using a planimeter or by obtaining the median elevation that exceeded for 50 of the distance in sectors and averaging those values 4 Examples of HAAT calculations i The heights above average terrain on the eight radials are as follows Meters 0 120 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
are different from what may be expected in practice For example a mountain ridge may indicate the practical limit of service although the prediction method may indicate otherwise In such cases the prediction method should be followed but a supplemental showing may be made concerning the contour distances as determined ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
Figure 4 g If the lowest field strength value of interest is initially predicted to occur over a particular propagation path at a distance that is less than 50 kilometers from the antenna the terrain profile segment used in the determination of terrain roughness factor over that path must be that included between point... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
frequency of signal in MHz MHz Secs 4 5 303 48 Stat as amended 1066 1068 1082 47 U S C 154 155 303 28 FR 13623 Dec 14 1963 as amended at 40 FR 27678 July 1 1975 48 FR 29507 June 27 1983 52 FR 11655 Apr 10 1987 52 FR 37789 Oct 9 1987 57 FR 48333 Oct 23 1992 63 FR 33877 June 22 1998 Effective Date Note At 42 FR 25736 May... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
for measurements i On large scale topographic maps eight or more radials are drawn from the transmitter location to the maximum distance at which measurements are to be made with the angles included between adjacent radials of approximately equal size Radials should be oriented so as to traverse representative types of... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
field strength is continuously recorded on a chart recorder over the length of the run vi The actual measuring location is marked exactly on the topographic map and a written record keyed to the specific location is made of all factors which may affect the recorded field such as topography height and types of vegetatio... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
transmitting antenna B Ground elevation at measuring location C Date time of day and weather D Median field in dBu for 0 dBk for mobile run or for cluster as well as maximum and minimum measured field strengths E Notes describing each measuring location ii U S Geological Survey topographic maps on which is shown the ex... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
specific communities 1 Preparation for measurement i The population P of the community and its suburbs if any is determined by reference to an appropriate source e g the 1970 U S Census tables of population of cities and urbanized areas ii The number of locations at which measurements are to be made shall be at least 1... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
made with no less than three such mobile runs in any case The points at which mobile measurements are made shall be well separated Spot measurements may be made at other measuring points iv Each actual measuring location is marked exactly on the map of the community and suitably keyed A written record shall be maintain... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
equipment used for the measurements which for each instrument specifies its manufacturer type serial number and rated accuracy and the date of its most recent calibration by the manufacturer or by a laboratory Complete details of any instrument not of standard manufacture shall be submitted 47 CFR 73 314 c 3 vi enhance... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
the urban population within the area to be served It is recognized that topography shape of the desired service area and population distribution may make the choice of a transmitter location difficult In such cases consideration may be given to the use of a directional antenna system although it is generally preferable... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
10570 Apr 2 1987 65 FR 79778 Dec 20 2000 73 316 FM antenna systems a It shall be standard to employ horizontal polarization however circular or elliptical polarization may be employed if desired Clockwise or counterclockwise rotation may be used The supplemental vertically polarized effective radiated power required fo... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
antenna not the patterns for each of the individual antennas Applications must include valuations tabulated at intervals of not greater than ten 10 degrees In addition tabulated values of all maximas and minimas with their corresponding azimuths must be submitted 2 Applications for license upon completion of antenna co... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
be provided and not the pattern for each of the individual antennas iii A tabulation of the measured or computer modeled relative field pattern required in paragraph c 1 of this section The tabulation must use the same zero degree reference as the plotted pattern and must contain values for at least every 10 degrees Su... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
a certification that the software executed normally without generating any error messages or warnings indicating an error in the program inputs Such computer modeling shall include modeling of the antenna mounted on a tower or tower section and the tower or tower section model must include transmission lines ladders co... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
within any horizontal or vertical distance specified by the antenna manufacturer as being necessary for proper directional operation viii A statement from an engineer listing such individual engineer s qualifications and certifying that the antenna has been installed pursuant to the manufacturer s instructions ix A sta... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
immediate vicinity i e 60 meters or less of other FM or TV broadcast antennas must include a showing as to the expected effect if any of such proximate operation e Where an FM licensee or permittee proposes to mount its antenna on or near an AM tower as defined in 1 30002 the FM licensee or permittee must comply with 1... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
or less c Any emission appearing on a frequency removed from the carrier by more than 240 kHz and up to and including 600 kHz must be attenuated at least 35 dB below the level of the unmodulated carrier d Any emission appearing on a frequency removed from the carrier by more than 600 kHz must be attenuated at least 43 ... | corpus_data/corpus_txt/47-CFR-Part-73-_up-to-date-as-of-2-20-2024_.txt |
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