47 C.F.R. § 78.18

Current through November 30, 2024

Section 78.18 - Frequency assignments

(a) The Cable Television Relay Service is assigned the band of frequencies from 12.70 to 13.20 GHz. This band is shared with the Fixed-Satellite Service (earth-to-space) from 12.70 to 12.75 GHz and Television Auxiliary Broadcast Stations from 12.70 to 13.20 GHz. The following channels may be assigned to CARS stations for the propagation of radio waves with the indicated polarization:

(1) For CARS stations using FM transmission:

Group A Channels

Designation	Channel boundaries (GHz)
A011	12.700-12.725
A021	12.725-12.750
A031	12.750-12.775
A041	12.775-12.800
A051	12.800-12.825
A061	12.825-12.850
A071	12.850-12.875
A081	12.875-12.900
A091	12.900-12.925
A101	12.925-12.950
A111	12.950-12.975
A121	12.975-13.000
A131	13.000-13.025
A141	13.025-13.050
A151	13.050-13.075
A161	13.075-13.100
A171	13.100-13.125
A181	13.125-13.150
A191	2 13.150-13.175
A201	2 13.170-13.200

¹ Appropriate polarization designation:

H = Horizontally polarized propagated radio wave.

V = Vertically polarized propagated radio wave.

R = Right-handed (clockwise) elliptically polarized propagated radio wave.

L = Left-handed (counter-clockwise) elliptically polarized propagated radio wave.

² See paragraph (l) of this section.

NOTE: Polarization designations shall be in accordance with IEEE standard 100-1972 as amended.

Group B Channels

Designation	Channel boundaries (GHz)
B011	12.7125-12.7375
B021	12.7375-12.7625
B031	12.7625-12.7875
B041	12.7875-12.8125
B051	12.8125-12.8375
B061	12.8375-12.8625
B071	12.8625-12.8875
B081	12.8875-12.9125
B091	12.9125-12.9375
B101	12.9375-12.9625
B111	12.9625-12.9875
B121	12.9875-13.0125
B131	13.0125-13.0375
B141	13.0375-13.0625
B151	13.0625-13.0875
B161	13.0875-13.1125
B171	13.1125-13.1375
B181	2 13.1375-13.1625
B191	2 13.1625-13.1875

¹ See footnote 1 following GROUP A CHANNELS.

² See paragraph (l) of this section.

NOTE: Polarization designations shall be in accordance with IEEE standard 100-1972 as amended.

(2) CARS stations using vestigal sideband AM transmission and FM transmission requiring a necessary bandwidth of no more than 6 MHz.

Group C Channels

Designation	Channel boundaries (GHz) [C channels]	Alternate change boundaries (GHz) [Ca channels]
C011	12.7005-12.7065	12.7005-12.7065
C021	12.7065-12.7125	12.7065-12.7125
C031	12.7125-12.7185	12.7125-12.7185
C041	12.7185-12.72252	12.7185-12.7245
C051	12.7225-12.7285	12.7245-12.7305
C061	12.7285-12.7345	12.7305-12.7365
C071	12.7345-12.7405	12.7365-12.7425
C081	12.7405-12.7465	12.7425-12.7485
C091	12.7465-12.7525	12.7485-12.7545
C101	12.7525-12.75452
C111	12.7545-12.7605	12.7545-12.7605
C121	12.7605-12.7665	12.7605-12.7665
C131	12.7665-12.7725	12.7665-12.7725
C141	12.7725-12.7785	12.7725-12.7785
C151	12.7785-12.7845	12.7785-12.7845
C161	12.7845-12.7905	12.7845-12.7905
C171	12.7905-12.7965	12.7905-12.7965
C181	12.7965-12.8025	12.7965-12.8025
C191	12.8025-12.8085	12.8025-12.8085
C201	12.8085-12.8145	12.8085-12.8145
C211	12.8145-12.8205	12.8145-12.8205
C221	12.8205-12.8265	12.8205-12.8265
C231	12.8265-12.8325	12.8265-12.8325
C241	12.8325-12.8385	12.8325-12.8385
C251	12.8385-12.8445	12.8385-12.8445
C261	12.8445-12.8505	12.8445-12.8505
C271	12.8505-12.8565	12.8505-12.8565
C281	12.8565-12.8625	12.8565-12.8625
C291	12.8625-12.8685	12.8625-12.8685
C301	12.8685-12.8745	12.8685-12.8745
C311	12.8745-12.8805	12.8745-12.8805
C321	12.8805-12.8865	12.8805-12.8865
C331	12.8865-12.8925	12.8865-12.8925
C341	12.8925-12.8985	12.8925-12.8985
C351	12.8985-12.9045	12.8985-12.9045
C361	12.9045-12.9105	12.9045-12.9105
C371	12.9105-12.9165	12.9105-12.9165
C381	12.9165-12.9225	12.9165-12.9225
C391	12.9225-12.9285	12.9225-12.9285
C401	12.9285-12.9345	12.9285-12.9345
C411	12.9345-12.9405	12.9345-12.9405
C421	12.9405-12.9465	12.9405-12.9465
C431	12.9465-12.9525	12.9465-12.9525

¹ See footnote 1 following GROUP A CHANNELS.

² For transmission of pilot subcarriers or other authorized narrow band signals.

Group D Channels

Designation	Channel boundaries (GHz) [D channels]	Alternate channel boundaries (GHz) [Da channels]
D011	12.7597-12.7657	12.7597-12.7657
D021	12.7657-12.7717	12.7657-12.7717
D031	12.7717-12.7777	12.7717-12.7777
D041	12.7777-12.78172	12.7777-12.7837
D051	12.7817-12.7877	12.7837-12.7897
D061	12.7877-12.7937	12.7897-12.7957
D071	12.7937-12.7997	12.7957-12.8017
D081	12.7997-12.8057	12.8017-12.8077
D091	12.8057-12.8117	12.8077-12.8137
D101	12.8117-12.81372	N/A
D111	12.8137-12.8197	12.8137-12.8197
D121	12.8197-12.8257	12.8197-12.8257
D131	12.8257-12.8317	12.8257-12.8317
D141	12.8317-12.8377	12.8317-12.8377
D151	12.8377-12.8437	12.8377-12.8437
D161	12.8437-12.8497	12.8437-12.8497
D171	12.8497-12.8557	12.8497-12.8557
D181	12.8557-12.8617	12.8557-12.8617
D191	12.8617-12.8677	12.8617-12.8677
D201	12.8677-12.8737	12.8677-12.8737
D211	12.8737-12.8797	12.8737-12.8797
D221	12.8797-12.8857	12.8797-12.8857
D231	12.8857-12.8917	12.8857-12.8917
D241	12.8917-12.8977	12.8917-12.8977
D251	12.8977-12.9037	12.8977-12.9037
D261	12.9037-12.9097	12.9037-12.9097
D271	12.9097-12.9157	12.9097-12.9157
D281	12.9157-12.9217	12.9157-12.9217
D291	12.9217-12.9277	12.9217-12.9277
D301	12.9277-12.9337	12.9277-12.9337
D311	12.9337-12.9397	12.9337-12.9397
D321	12.9397-12.9457	12.9397-12.9457
D331	12.9457-12.9517	12.9457-12.9517
D341	12.9517-12.9577	12.9517-12.9577
D351	12.9577-12.9637	12.9577-12.9637
D361	12.9637-12.9697	12.9637-12.9697
D371	12.9697-12.9757	12.9697-12.9757
D381	12.9757-12.9817	12.9757-12.9817
D391	12.9817-12.9877	12.9817-12.9877
D401	12.9877-12.9937	12.9877-12.9937
D411	12.9937-12.9997	12.9937-12.9997
D421	12.9997-13.0057	12.9997-13.0057
D431	13.0057-13.0117	13.0057-13.0117

¹ See footnote 1 following GROUP A CHANNELS.

² For transmission of pilot subcarriers or other authorized narrow band signals.

Group E Channels

Designation	Channel boundaries (GHz) [E channels]	Alternate channel boundaries (GHz) [Ea channels]
E011	12.9525-12.9585	12.9525-12.9585
E021	12.9585-12.9645	12.9585-12.9645
E031	12.9645-12.9705	12.9645-12.9705
E041	12.9705-12.97452	12.9705-12.9765
E051	12.9745-12.9805	12.9765-12.9825
E061	12.9805-12.9865	12.9825-12.9885
E071	12.9865-12.9925	12.9885-12.9945
E081	12.9925-12.9985	12.9945-13.0005
E091	12.9985-13.0045	13.0005-13.0065
E101	13.0045-13.00652	N/A
E111	13.0065-13.0125	13.0065-13.0125
E121	13.0125-13.0185	13.0125-13.0185
E131	13.0185-13.0245	13.0185-13.0245
E141	13.0245-13.0305	13.0245-13.0305
E151	13.0305-13.0365	13.0305-13.0365
E161	13.0365-13.0425	13.0365-13.0425
E171	13.0425-13.0485	13.0425-13.0485
E181	13.0485-13.0545	13.0485-13.0545
E191	13.0545-13.0605	13.0545-13.0605
E201	13.0605-13.0665	13.0605-13.0665
E211	13.0665-13.0725	13.0665-13.0725
E221	13.0725-13.0785	13.0725-13.0785
E231	13.0785-13.0845	13.0785-13.0845
E241	13.0845-13.0905	13.0845-13.0905
E251	13.0905-13.0965	13.0905-13.0965
E261	13.0965-13.1025	13.0965-13.1025
E271	13.1025-13.1085	13.1025-13.1085
E281	13.1085-13.1145	13.1085-13.1145
E291	13.1145-13.1205	13.1145-13.1205
E301	13.1205-13.1265	13.1205-13.1265
E311	13.1265-13.1325	13.1265-13.1325
E321	13.1325-13.1385	13.1325-13.1385
E331	13.1385-13.1445	13.1385-13.1445
E341	13.1445-13.15053	13.1445-13.15053
E351	13.1505-13.15653	13.1505-13.15653
E361	13.1565-13.16253	13.1565-13.16253
E371	13.1625-13.16853	13.1625-13.16853
E381	13.1685-13.17453	13.1685-13.17453
E391	13.1745-13.18053	13.1745-13.18053
E401	13.1805-13.18653	13.1805-13.18653
E411	13.1865-13.19253	13.1865-13.19253
E421	13.1925-13.19853	13.1925-13.19853

¹ See footnote 1 following GROUP A CHANNELS.

² For transmission of pilot subcarriers or other authorized narrow band signals.

³ See paragraph (l) of this section.

Group F Channels

Designation	Channel boundaries (GHz) [F channels]	Alternate channel boundaries (GHz) [Fa channels]
F011	13.0125-13.0185	13.0125-13.0185
F021	13.0185-13.0245	13.0185-13.0245
F031	13.0245-13.0305	13.0245-13.0305
F041	13.0305-13.03452	13.0305-13.0365
F051	13.0345-13.0405	13.0365-13.0425
F061	13.0405-13.0465	13.0425-13.0485
F071	13.0465-13.0525	13.0485-13.0545
F081	13.0525-13.0585	13.0545-13.0605
F091	13.0585-13.0645	13.0605-13.0665
F101	13.0645-13.06652	N/A
F111	13.0665-13.0725	13.0665-13.0725
F121	13.0725-13.0785	13.0725-13.0785
F131	13.0785-13.0845	13.0785-13.0845
F141	13.0845-13.0905	13.0845-13.0905
F151	13.0905-13.0965	13.0905-13.0965
F161	13.0965-13.1025	13.0965-13.1025
F171	13.1025-13.1085	13.1025-13.1085
F181	13.1085-13.1145	13.1085-13.1145
F191	13.1145-13.1205	13.1145-13.1205
F201	13.1205-13.1265	13.1205-13.1265
F211	13.1265-13.1325	13.1265-13.1325
F221	13.1325-13.1385	13.1325-13.1385
F231	13.1385-13.1445	13.1385-13.1445
F241	13.1445-13.15053	13.1445-13.15053
F251	13.1505-13.15653	13.1505-13.15653
F261	13.1565-13.16253	13.1565-13.16253
F271	13.1625-13.16853	13.1625-13.16853
F281	13.1685-13.17453	13.1685-13.17453
F291	13.1745-13.18053	13.1745-13.18053
F301	13.1805-13.18653	13.1805-13.18653
F311	13.1865-13.19253	13.1865-13.19253
F321	13.1925-13.19853	13.1925-13.19853

¹ See footnote 1 following GROUP A CHANNELS.

² For transmission of pilot subcarriers or other authorized narrow band signals.

³ See paragraph (l) of this section.

(3) For CARS stations using AM and FM transmission requiring a necessary bandwidth of no more than 12.5 MHz.

Group K Channel

Designation	Channel boundaries (GHz)
K011	12.7000-12.7125
K021	12.7125-12.7250
K031	12.7250-12.7375
K041	12.7375-12.7500
K051	12.7500-12.7625
K061	12.7625-12.7750
K071	12.7750-12.7875
K081	12.7875-12.8000
K091	12.8000-12.8125
K101	12.8125-12.8250
K111	12.8250-12.8375
K121	12.8375-12.8500
K131	12.8500-12.8625
K141	12.8625-12.8750
K151	12.8750-12.8875
K161	12.8875-12.9000
K171	12.9000-12.9125
K181	12.9125-12.9250
K191	12.9250-12.9375
K201	12.9375-12.9500
K211	12.9500-12.9625
K221	12.9625-12.9750
K231	12.9750-12.9875
K241	12.9875-13.0000
K251	13.0000-13.0125
K261	13.0125-13.0250
K271	13.0250-13.0375
K281	13.0375-13.0500
K291	13.0500-13.0625
K301	13.0625-13.0750
K311	13.0750-13.0875
K321	13.0875-13.1000
K331	13.1000-13.1125
K341	13.1125-13.1250
K351	13.1250-13.1375
K361	13.1375-13.1500
K371 2	13.1500-13.1625
K381 2	13.1625-13.1750
K391 2	13.1750-13.1875
K401 2	13.1875-13.2000

¹ See footnote 1 following GROUP A CHANNELS.

² See paragraph (l) of this section.

(4) The Cable Television Relay Service is also assigned the following frequencies in the 17,700-19,700 MHz band. These frequencies are co-equally shared with stations in other services under parts 25, 74, and 101 of this chapter. Cable Television Relay Service stations operating on frequencies in the sub-bands 18.3-18.58 GHz and 19.26-19.3 GHz that were licensed or had applications pending before the Commission as of September 18, 1998 may continue those operations on a shared co-primary basis with other services under parts 25, 74, and 101 of this chapter. Such stations, however, are subject to relocation by licensees in the fixed-satellite service. Such relocation is subject to the provisions of §§ 101.85 through 101.97 of this chapter. No new applications for part 78 licenses will be accepted in the 19.26-19.3 GHz band after June 8, 2000, and no new applications for part 78 licenses will be accepted in the 18.3-18.58 GHz band after November 19, 2002.

(i) 2 MHz maximum authorized bandwidth channel:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
18141.0	n/a

(ii) 6 MHz maximum authorized bandwidth channels:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
216 MHz Separation
18145.0	n/a
18151.0	18367.0
18157.0	18373.0
18163.0	18379.0
18169.0	18385.0
18175.0	18391.0
18181.0	18397.0
18187.0	18403.0
18193.0	18409.0
18199.0	18415.0
18205.0	18421.0
18211.0	18427.0
18217.0	18433.0
18223.0	18439.0
18229.0	18445.0
18235.0	18451.0
18241.0	18457.0
18247.0	18463.0
18253.0	18469.0
18259.0	18475.0
18265.0	18481.0
18271.0	18487.0
18277.0	18493.0
18283.0	18499.0
18289.0	18505.0
18295.0	18511.0
18301.0	18517.0
18307.0	18523.0
18313.0	18529.0
18319.0	18535.0
18325.0	18541.0
18331.0	18547.0
18337.0	18553.0
18343.0	18559.0
18349.0	18565.0
18355.0	18571.0
18361.0	18577.0

(iii) 10 MHz maximum authorized bandwidth channels:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
1560 MHz Separation
17705.0	19265.0
17715.0	19275.0
17725.0	19285.0
17735.0	19295.0
17745.0	19305.0
17755.0	19315.0
17765.0	19325.0
17775.0	19335.0
17785.0	19345.0
17795.0	19355.0
17805.0	19365.0
17815.0	19375.0
17825.0	19385.0
17835.0	19395.0
17845.0	19405.0
17855.0	19415.0
17865.0	19425.0
17875.0	19435.0
17885.0	19445.0
17895.0	19455.0
17905.0	19465.0
17915.0	19475.0
17925.0	19485.0
17935.0	19495.0
17945.0	19505.0
17955.0	19515.0
17965.0	19525.0
17975.0	19535.0
17985.0	19545.0
17995.0	19555.0
18005.0	19565.0
18015.0	19575.0
18025.0	19585.0
18035.0	19595.0
18045.0	19605.0
18055.0	19615.0
18065.0	19625.0
18075.0	19635.0
18085.0	19645.0
18095.0	19655.0
18105.0	19665.0
18115.0	19675.0
18125.0	19685.0
18135.0	19695.0

(iv) 20 MHz maximum authorized bandwidth channels:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
1560 MHz Separation
17710.0	19270.0
17730.0	19290.0
17750.0	19310.0
17770.0	19330.0
17790.0	19350.0
17810.0	19370.0
17830.0	19390.0
17850.0	19410.0
17870.0	19430.0
17890.0	19450.0
17910.0	19470.0
17930.0	19490.0
17950.0	19510.0
17970.0	19530.0
17990.0	19550.0
18010.0	19570.0
18030.0	19590.0
18050.0	19610.0
18070.0	19630.0
18090.0	19650.0
18110.0	19670.0
18130.0	19690.0

(v) 40 MHz maximum authorized bandwidth channels:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
1560 MHz Separation
17720.0	19280.0
17760.0	19320.0
17800.0	19360.0
17840.0	19400.0
17880.0	19440.0
17920.0	19480.0
17960.0	19520.0
18000.0	19560.0
18040.0	19600.0
18080.0	19640.0
18120.0	19680.0

(vi) 80 MHz maximum authorized bandwidth channels:

Transmit (receive) (MHz)	Receive (transmit) (MHz)
1560 MHz Separation
17740.0	19300.0
17820.0	19380.0
17900.0	19460.0
17980.0	19540.0
18060.0	19620.0

(5)6425 to 6525 MHz-Mobile only. Paired and unpaired operations permitted. Use of this spectrum for direct delivery of video programs to the general public or multi-channel cable distribution is not permitted. This band is co-equally shared with mobile stations licensed pursuant to Parts 74 and 101 of the Commission's Rules. The following channel plans apply.

(i) 1 MHz maximum authorized bandwidth channels.

Transmit (or receive) (MHz)	Receive (or transmit) (MHz)
6425.5	6475.5
6450.5	6500.5

(ii) 8 MHz maximum authorized bandwidth channels.

Transmit (or receive) (MHz)	Receive (or transmit) (MHz)
6430.0	6480.0
6438.0	6488.0
6446.0	6496.0
6455.0	6505.0
6463.0	6513.0
6471.0	6521.0

(iii) 25 MHz maximum authorized bandwidth channels.

Transmit (or receive) (MHz)	Receive (or transmit) (MHz)
6437.5	6487.5
6462.5	6512.5

(6)1990-2110 MHz-Mobile only.

(i) Use of this spectrum for direct delivery of video programs to the general public or multi-channel cable distribution is not permitted. This band is co-equally shared with stations licensed pursuant to parts 74 and 101 of the Commission's Rules. (Common carriers may use this band pursuant to provisions of § 101.803(b) ). The following channeling plan applies subject to the provisions of § 74.604 .

Frequency Band (MHz)

1990-2008

2008-2025

2025-2042

2042-2059

2059-2076

2076-2093

2093-2110

(ii) After a licensee has been relocated in accordance with the provisions of § 78.40 , operations will be in the band 2025-2110 MHz. The following channel plan will apply, subject to the provisions of § 74.604 of this part:

Frequency Band (MHz)

2025.5-2037.5

2037.5-2049.5

2049.5-2061.5

2061.5-2073.5

2073.5-2085.5

2085.5-2097.5

2097.5-2109.5

(7)6875-7125 MHz-Mobile only. Use of this spectrum for direct delivery of video programs to the general public or multi-channel cable distribution is not permitted. This band is co-equally shared with stations licensed pursuant to parts 74 and 101 of the Commission's Rules. (Common carriers may use this band pursuant to provisions of § 101.803(b) ). The following channeling plan applies subject to the provisions of § 74.604 .

Frequency Band (MHz)

6875-6900

6900-6925

6925-6950

6950-6975

6975-7000

7000-7025

7025-7050

7050-7075

7075-7100

7100-7125

(b) Television Auxiliary Broadcast Service stations may be assigned channels in the band 12.70-13.20 GHz subject to the condition that no harmful interference is caused to fixed CARS stations authorized at the time of such grants. Translator Relay stations are assigned on a secondary basis. New CARS stations shall not cause harmful interference to television STL and intercity relay stations authorized at the time of such grants. Television pickup stations and CARS pickup stations will be assigned channels in the band on a co-equal basis subject to the conditions that they accept interference from and cause no interference to existing or subsequently authorized television STL, television intercity relay, or fixed CARS stations. Channels in the 13.150-13.200 GHz band will be assigned exclusively to television pickup and CARS pickup stations on a co-equal basis. A cable television system operator will normally be limited in any one area to the assignment of not more than three channels for CARS pickup use: Provided, however, That additional channels may be assigned upon a satisfactory showing that additional channels are necessary and are available.

(c) An application for a CARS station shall be specific with regard to the channel or channels requested. Channels shall be identified by the appropriate designations set forth in paragraph (a) of this section.

(d) For CARS Fixed stations using FM transmission with an authorized bandwidth per channel of 25 MHz, to conserve spectrum applicants are encouraged to use alternate A and B channels such that adjacent R.F. carriers are spaced 12.5 MHz. As example, a fixed station in the CARS, relaying several channels, would use A01, B01, A02, B02, A03, etc.

(e) For CARS stations using vestigial sideband AM transmissions, channels from only the Groups C, D, E or F and those frequencies listed in paragraph (a)(4)(ii) of this section normally will be assigned a station, although upon adequate showing variations in the use of channels in Groups C, D, E or F and those frequencies listed in paragraph (a)(4)(ii) of this section may be authorized on a case-by-case basis in order to avoid potential interference or to permit a more efficient use. In situations where the number or the arrangement of channels available in these groups is not adequate, or in order to avoid potential interference, or in order to achieve the required VHF channelization arrangement on the cable television system or for repeated operations, or for two way transmission, or upon the showing of other good cause, the use of channels in the Groups C, D, E or F and those frequencies listed in paragraph (a)(4)(ii) of this section may be authorized. Applicants are encouraged to apply for adjacent channels within each group of channels, except that different channel arrangements may be authorized when required to conform to the required channelization arrangement at VHF on the cable television system, when it is necessary to transmit non-adjacent off-the-air channels or signals intended to fill non-adjacent slots in the spectrum, or to avoid potential interference, or upon other showing of good cause.

(f) For vestigial sideband AM transmission, the assigned visual carrier frequency for each channel listed in Groups C, D, E or F and those frequencies listed in paragraph (a)(4)(ii) of this section shall be 1.25 MHz above the lower channel-edge frequency. The center frequency for the accompanying FM aural carrier in each channel shall be 4.5 MHz above the corresponding visual carrier frequency.

(g) For CARS stations using double sideband AM transmission or FM transmission with authorized bandwidth of no more than 12.5 MHz, Group K channels normally will be assigned to a station, although upon adequate showing variations in the use of channels in Group K may be authorized on a case-by-case basis in order to avoid potential interference or to permit a more efficient use.

(h) For double sideband AM transmission, the assigned carrier frequency for each channel listed in Group K shall be 6.25 MHz above the lower boundary frequency for each channel, and the sideband frequencies corresponding to the carrier frequency of the accompanying FM aural signal shall be 4.5 MHz above and below the visual carrier frequency.

(i) All stations shall employ no more than a 12.5 MHz authorized bandwidth per channel except in any one or more of the following circumstances:

(1) The station is a CARS pickup station;

(2) The transmission path is more than 16.1 km (10 miles) in length;

(3) The station was authorized or an application was on file therefor prior to July 26, 1973.

(4) Other good cause has been shown that use of a bandwidth of 12.5 MHz or less per channel would be inefficient, impractical, or otherwise contrary to the public interest.

(j) Should any conflict arise among applications for stations in this band, priority will be based on the filing date of an application completed in accordance with the instructions thereon.

(k) Applicants for Group K channels shall apply for adjacent channels and the requested channels shall overlap the least possible number of Group A channels, except that different channel arrangements may be authorized upon an adequate showing that the foregoing arrangement cannot be used or would be contrary to the public interest, or in order to avoid potential interference or to permit a more efficient use.

(l) The band 13.15-13.20 GHz is reserved for television pickup and CARS pickup stations inside a 50 km radius of the 100 television markets delineated in § 76.51 of this chapter. Outside a 50 km radius of the 100 television markets delineated in § 76.51 of this chapter, television pickup stations, CARS stations and NGSO FSS gateway earth stations shall operate on a primary co-equal basis. The band 13.20-13.2125 GHz is reserved for television pickup stations on a primary basis and CARS pickup stations on a secondary basis inside a 50 km radius of the 100 television markets delineated in § 76.51 of this chapter. Outside a 50 km radius of the 100 markets delineated in § 76.51 of this chapter, television pickup stations and NGSO FSS gateway earth stations shall operate on a co-primary basis, CARS stations shall operate on a secondary basis. Fixed television auxiliary stations licensed pursuant to applications accepted for filing before September 1, 1979, may continue operation on channels in the 13.15-13.25 GHz band, subject to periodic license renewals. NGSO FSS gateway uplink transmissions in the 13.15-13.2125 GHz segment shall be limited to a maximum EIRP of 3.2 dBW towards 0 degrees on the radio horizon. These provisions shall not apply to GSO FSS operations in the 12.75-13.25 GHz band.

(m) CARS stations may be authorized for use of the band from 13.20 to 13.25 GHz on a secondary basis to Television Broadcast Auxiliary Stations. CARS stations are also secondary to NGSO FSS gateway earth station uplink operations. Any CARS application seeking authorization for use of the 13.20 to 13.25 GHz band must demonstrate that the applicant has exhausted all spectrum available to it in the 12.70 to 13.20 GHz band. Applications for use of this band must specify whether the channels are 6 MHz, 12.5 MHz, or 25 MHz wide and give the upper and lower boundaries and the polarization for each channel.

47 C.F.R. §78.18

37 FR 3292, Feb. 12, 1972. Redesignated at 37 FR 15926, Aug. 8, 1972

84 FR 63811 , 11/19/2019

For FEDERAL REGISTER citations affecting § 78.18, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.