Federal Register / Vol. 54, No. 78 / Tuesday, April 25, 1989 / Rules and Regulations
`
`17731
`
`(1) The dates and places where the
`device will be operated;
`(2) The purpose for which the device
`will be used;
`(3) A description of the device,
`including the operating frequency, RF
`power output, and antenna; and,
`(4) A statement that the device
`complies with the technical provisions
`of this part.
`
`§ 15.241 Operation in the band 174-216
`MHz.
`
`(a) Operation under the provisions of
`this section is restricted to biomedical
`telemetry devices.
`(b) Emissions from the device shall be
`confined within a 200 kHz band which
`shall lie wholly within the frequency
`range of 174-216 MHz.
`(c) The field strength of any emissions
`radiated within the specified 200 kHz
`band shall not exceed 1500 microvolts/
`meter at 3 meters. The field strength of
`emissions radiated on any frequency
`outside of the specified 200 kHz band
`shall not exceed 150 microvolts/meter at
`3 meters. The emission limits in this
`paragraph are based on measurement
`instrumentation employing an average
`detector. The provisions in § 15.35 for
`limiting peak emissions apply.
`
`§ 15.243 Operation in the band 890-940
`MHz.
`
`(a) Operation under the provisions of
`this section is restricted to devices that
`use radio frequency energy to measure
`the characteristics of a material. Devices
`operated pursuant to the provisions of
`this section shall not be used for voice
`communications or the transmission of
`any other type of message.
`(b) The field strength of any emissions
`radiated within the specified frequency
`band shall not exceed 500 microvolts/
`meter at 30 meters. The emission limit in
`this paragraph is based on measurement
`instrumentation employing an average
`detector. The provisions in § 15.35 for
`limiting peak emissions apply.
`(c) The field strength of emissions
`radiated on any frequency outside of the
`specified band shall not exceed the
`general radiated emission limits in
`§ 15.209.
`(d) The device shall be self-contained
`with no external or readily accessible
`controls which may be adjusted to
`permit operation in a manner
`inconsistent with the provisions in this
`section. Any antenna that may be used
`with the device shall be permanently
`attached thereto and shall not be readily
`modifiable by the user.
`
`§ 15.245 Operation within the bands 902-
`928 MHz, 2435-2465 MHz, 5785-5815 MHz,
`10500-10550 MHz, and 24075-24175 MHz.
`(a) Operation under the provisions of
`this section is limited to intentional
`radiators used as field disturbance
`sensors, excluding perimeter protection
`systems.
`(b) The field strength of emissions
`from intentional radiators operated
`within these frequency bands shall
`comply with the following:
`
`Fundamental
`frequency (MHz)
`
`Field
`strength of
`fundamental
`(millivolts/
`meter)
`
`Field
`strength of
`harmonics
`(millivolts/
`meter)
`
`902-928........................
`2435-2465....................
`5785-5815....................
`10500-10550.................
`24075-24175.................
`
`500
`500
`500
`2500
`2500
`
`1 .6
`
`1 . 8
`
`1 .6
`25.0
`25.0
`
`(1) Field strength limits are specified
`at a distance of 3 meters.
`(2) Emissions radiated outside of the
`specified frequency bands, except for
`harmonics, shall be attenuated by at
`least 50 dB below the level of the
`fundamental or to the general radiated
`emission limits in § 15.209, whichever is
`the lesser attenuation.
`(3) The emission limits shown in the
`above table are based on measurement
`instrumentation employing an average
`detector. The provisions in § 15.35 for
`limiting peak emissions apply.
`
`§ 15.247 Operation within the bands 902-
`928 MHz, 2400-2483.5 MHz, and 5725-5850
`MHz.
`(a) Operation under the provisions of
`this section is limited to frequency
`hopping and direct sequence spread
`spectrum intentional radiators that
`comply with the following provisions:
`(1) For frequency hopping systems, at
`least 75 hopping frequencies, separated
`by at least 25 kHz, shall be used. The
`average time of occupancy on any
`frequency shall not be greater than 0.4
`seconds within a 30 second period. The
`maximum bandwidth of the hopping
`channel is 25 kHz.
`(2) For direct sequence systems, the
`minimum 6 dB bandwidth shall be at
`least 500 kHz.
`(b) The maximum peak output power
`of the intentional radiator shall not
`exceed one watt.
`(c) Radio frequency output power
`outside these frequency bands over any
`100 kHz bandwidth shall be at least 20
`dB below that in any 100 kHz bandwidth
`within the band that contains the
`highest level of the desired power.
`
`Note: Spread spectrum systems are sharing
`these bands on a noninterference basis with
`
`systems supporting critical Government
`requirements that have been allocated the
`usage of these bands, secondary only to ISM
`equipment operated under the provisions of
`Part 18 of this chapter. Many of these
`Government systems are airborne
`radiolocation systems that emit a high EIRP
`which can cause interference to other users.
`Also, investigations of the effect of spread
`spectrum interference to U. S. Government
`operations in the 902-928 MHz band may
`require a future decrease in the power limits
`allowed for spread spectrum operation.
`
`§ 15.249 Operation within the bands 902-
`928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ,
`and 24.0-24.25 GHz
`
`(a) The field strength of emissions
`from intentional radiators operated
`within these frequency bands shall
`comply with the following:
`
`Fundamental
`frequency
`
`Field
`strength of
`fundamental
`(millivolts/
`meter)
`
`Field
`strength of
`harmonics
`(microvolts/
`meter)
`
`902-928 MHz......... ......
`2400-2483.5 MHz.........
`5725-5875 MHz............
`24.0-24.25 GHz............
`
`50
`50
`50
`250
`
`500
`500
`500
`2500
`
`(b) Field strength limits are specified
`at a distance of 3 meters.
`(c) Emissions radiated outside of the
`specified frequency bands, except for
`harmonics, shall be attenuated by at
`least 50 dB below the level of the
`fundamental or to the general radiated
`emission limits in § 15.209, whichever is
`the lesser attenuation.
`(d) As shown in § 15.35(b), for
`frequencies above 1000 MHz, the above
`field strength limits are based on
`average limits. However, the peak field
`strength of any emission shall not
`exceed the maximum permitted average
`limits specified above by more than 20
`dB under any condition of modulation.
`
`§ 15.251 Operation within the bands 2.9-
`3.26 GHz, 3.267-3.332 GHz, 3.339-3.3458
`GHz, and 3.358-3.6 GHz.
`
`(a) Operation under the provisions of
`this section is limited to automatic
`vehicle identification systems (AVIS)
`which use swept frequency techniques
`for the purpose of automatically
`identifying transportation vehicles.
`(b) The field strength anywhere within
`the frequency range swept by the signal
`shall not exceed 3000 microvolts/meter/
`MHz at 3 meters in any direction.
`Further, an AVIS, when in its operating
`position, shall not produce a field
`strength greater than 400 microvolts/
`meter/MHz at 3 meters in any direction
`within ± 10 degrees of the horizontal
`
`Petitioner's Exhibit 1007
`Page 001
`
`