Goto Section: 101.105 | 101.109 | Table of Contents
FCC 101.107
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 101.107 Frequency tolerance.
(a) The carrier frequency of each transmitter authorized in these services
must be maintained within the following percentage of the reference
frequency except as otherwise provided in paragraph (b) of this section or
in the applicable subpart of this part (unless otherwise specified in the
instrument of station authorization the reference frequency will be deemed
to be the assigned frequency):
Frequency (MHz) Frequency tolerance (percent)
928 to 929^5 0.0005
932 to 932.5 0.00015
932.5 to 935 0.00025
941 to 941.5 0.00015
941.5 to 944 0.00025
952 to 960^5 0.0005
1,850 to 1,990 0.002
2,110 to 2,200 0.001
2,450 to 2,500^1 0.001
3,700 to 4,200^1 0.005
5,925 to 6,875^1 0.005
6,875 to 7,125^1 0.005
10,550 to 11,700^1 2 0.005
11,700 to 12,200^1 0.005
12,200 to 13,250^4 0.005
14,200 to 14,400 0.03
17,700 to 18,820^3 0.003
18,820 to 18,920^3 0.001
928 to 929^5 0.0005
18,920 to 19,700^3 0.003
19,700 to 27,500^4 7 0.001
27,500 to 28,350 0.001
29,100 to 29,250 0.001
31,000 to 31,300^6 0.001
31,300 to 40,000^4 0.03
71,000 to 76,000^8
81,000 to 86,000^8
92,000 to 95,000^8
* * * * *
^1Applicable only to common carrier LTTS stations. Tolerance for 2450-2500
MHz is 0.005%. Beginning Aug. 9, 1975, this tolerance will govern the
marketing of LTTS equipment and the issuance of all such authorizations for
new radio equipment. Until that date new equipment may be authorized with a
frequency tolerance of .03% in the frequency range 2,200 to 10,500 MHz and
.05% in the range 10,500 MHz to 12,200 MHz, and equipment so authorized may
continue to be used for its life provided that it does not cause
interference to the operation of any other licensee. Beginning March 1,
2005, new LTTS operators will not be licensed and existing LTTS licensees
will not be renewed in the 11.7-12.2 GHz band.
^2See subpart G of this part for the stability requirements for transmitters
used in the Digital Electronic Message Service.
^3Existing type accepted equipment with a frequency tolerance of ±0.03% may
be marketed until December 1, 1988. Equipment installed and operated prior
to December 1, 1988 may continue to operate after that date with a minimum
frequency tolerance of ±0.03%. However, the replacement of equipment
requires that the current tolerance be met.
^4Applicable to private operational fixed point-to-point microwave and
stations providing MVDDS.
^5For private operational fixed point-to-point microwave systems, with a
channel greater than or equal to 50 KHz bandwidth, ±0.0005%; for multiple
address master stations, regardless of bandwidth, ±0.00015%; for multiple
address remote stations with 12.5 KHz bandwidths, ±0.00015%; for multiple
address remote stations with channels greater than 12.5 KHz bandwidth,
±0.0005%.
^6For stations authorized prior to March 11, 1997, transmitter tolerance
shall not exceed 0.03%.
^7The frequency tolerance for stations authorized on or before April 1, 2005
is 0.03%. Existing licensees and pending applicants on that date may
continue to operate after that date with a frequency tolerance of 0.03%,
provided that it does not cause harmful interference to the operation of any
other licensee. For analog systems, if the channel bandwidth is greater than
30 MHz up to 50 MHz, the frequency tolerance standard will be 0.03%; if the
channel bandwidth is 30 MHz or less, then the frequency tolerance standard
will be 0.003%. This analog standard is conditional provided that harmful
interference is not caused to digital stations operating within the 0.001%
tolerance standards. If harmful interference is caused to stations operating
with the more stringent standard, the onus shall be on the operators with
the less stringent parameters to develop an engineering solution to the
problem. For exceptions, see § 101.147 and § 101.507.
^8Equipment authorized to be operated in the 71,000-76,000 MHz,
81,000-86,000 MHz, 92,000-94,000 MHz and 94,100-95,000 MHz bands is exempt
from the frequency tolerance requirement noted in the table of paragraph (a)
of this section.
(b) Heterodyne microwave radio systems may be authorized at a somewhat less
restrictive frequency tolerance (up to .01 percent) to compensate for
frequency shift caused by numerous repeaters between base band signal
insertion. Where such relaxation is sought, applicant must provide all
calculations and indicate the desired tolerance over each path. In such
instances the radio transmitters and receivers used must individually be
capable of complying with the tolerance specified in paragraph (a) of this
section. Heterodyne operation is restricted to channel bandwidth of 10 MHz
or greater.
(c) As an additional requirement in any band where the Commission makes
assignments according to a specified channel plan, provisions must be made
to prevent the emission included within the occupied bandwidth from
radiating outside the assigned channel at a level greater than that
specified in § 101.111.
[ 61 FR 26677 , May 28, 1996, as amended at 62 FR 23167 , Apr. 29, 1997; 63 FR 6105 , Feb. 6, 1998; 63 FR 9448 , Feb. 25, 1998; 63 FR 14039 , Mar. 24, 1998;
63 FR 36611 , July 7, 1998; 66 FR 35110 , July 3, 2001; 67 FR 43038 , June 26,
2002; 68 FR 4956 , Jan. 31, 2003; 69 FR 3266 , Jan. 23, 2004; 69 FR 16832 ,
Mar. 31, 2004; 70 FR 4787 , Jan. 31, 2005; 76 FR 59572 , Sept. 27, 2011]
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Goto Section: 101.105 | 101.109
Goto Year: 2014 |
2016
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