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Federal Register / Vol. 86, No. 185 / Tuesday, September 28, 2021 / Rules and Regulations 95.2569 MedRadio field strength measurements.

13. Section 95.2533 is amended by revising paragraph e2 to read as follows:

95.2533

Prohibited MedRadio uses.

e
2 A non-radio frequency actuation signal generated by a device external to the body with respect to which the MedRadio implant or body-worn transmitter is used.
14. Section 95.2557 is amended by revising paragraphs b and c to read as follows:
95.2557 MedRadio duration of transmissions.

b MedRadio transmitters may transmit in the 401406 MHz band in accordance with the provisions of 95.2559b2 and 95.2559b3 for no more than 3.6 seconds in total within a one hour time period.
c MedRadio transmitters may transmit in the 401406 MHz band in accordance with the provisions of 95.2559b4 for no more than 360
milliseconds in total within a one hour time period.

15. Section 95.2559 is amended by revising paragraphs a6 introductory text, a6iii and the paragraph heading to paragraph f to read as follows:
95.2559
MedRadio channel access requirements.

a
6 When a channel is selected prior to a MedRadio communications session, it is permissible to select an alternate channel for use if communications are interrupted, provided that the alternate channel selected is the next best choice using the criteria specified in paragraphs a1 through 5 of this section. The alternate channel may be accessed in the event a communications session is interrupted by interference.
The following criteria must be met:

iii In the event that this alternate channel provision is not used by the MedRadio system, or if the criteria in paragraphs i and ii of this section are not met, a channel must be selected using the access criteria specified in paragraphs a1 through 5 of this section.

f Requirements for MBANs.
16. Section 95.2569 is amended by revising paragraph c to read as follows:

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c For a MedRadio transmitter intended to be implanted in a human body, radiated emissions and MEIRP
measurements for transmissions by stations authorized under this section may be made in accordance with an FCC-approved human body simulator and test technique. Guidance regarding dielectric parameters for the tissueequivalent material can be found in the Office of Engineering and Technology OET Laboratory Division Knowledge Database KDB.
17. Section 95.2573 is revised to read as follows:
95.2573 MedRadio authorized bandwidths.

Each MedRadio transmitter type must be designed such that the MedRadio emission bandwidth as defined in 95.2503 does not exceed the applicable limits set forth in this section.
a For MedRadio transmitters operating in the 402405 MHz band, the maximum MedRadio emission bandwidth is 300 kHz. Such transmitters must not use more than 300
kHz of bandwidth total during a MedRadio communications session.
This provision does not preclude full duplex or half duplex communications provided that the total bandwidth of all of the channels employed in a MedRadio communications session does not exceed 300 kHz.
b For MedRadio transmitters operating in the 401401.85 MHz band or the 405406 MHz band, the maximum MedRadio emission bandwidth is 100 kHz. Such transmitters must not use more than 100
kHz of bandwidth total during a MedRadio communications session.
This provision does not preclude full duplex or half duplex communications provided that the total bandwidth of all of the channels employed in a MedRadio communications session does not exceed 100 kHz.
c For MedRadio transmitters operating in the 401.85402 MHz band, the maximum MedRadio emission bandwidth is 150 kHz. Such transmitters must not use more than 150
kHz of bandwidth total during a MedRadio communications session.
This provision does not preclude full duplex or half duplex communications, provided that the total bandwidth of all of the channels employed in a MedRadio communications session does not exceed 150 kHz.
d For MedRadio transmitters operating in the 413419 MHz, 426432

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MHz, 438444 MHz or 451457 MHz bands, the maximum MedRadio emission bandwidth is 6 MHz.
e For MedRadio transmitters operating in the 23602400 MHz band, the maximum MedRadio emission bandwidth is 5 MHz.
f Lesser emission bandwidths may be employed, provided that the unwanted emissions are attenuated as provided in 95.2579. See also 95.2567 regarding maximum radiated power limits, 95.2565 on frequency accuracy, 95.2569 on field strength measurements, and 95.2585 on RF
exposure.
18. Section 95.2579 is amended by revising paragraphs c1, d introductory text, d1i and ii, and g to read as follows:

95.2579
limits.

MedRadio unwanted emissions

c
1 20 dB, on any frequency within the 402405 MHz band that is more than 150 kHz away from the center frequency of the MedRadio channel the transmission is intended to occupy;

d Attenuation requirements, 401
402 MHz, 405406 MHz. For MedRadio transmitter types designed to operate in the 401402 MHz band or 405406 MHz band, the power of unwanted emissions must be attenuated below the maximum permitted transmitter output power by at least:
1
i More than 75 kHz away from the center frequency of the MedRadio channel the transmission is intended to occupy if the MedRadio transmitter type is operating on a frequency between 401.85 and 402 MHz; or, ii More than 50 kHz away from the center frequency of the MedRadio channel the transmission is intended to occupy and 100 kHz or less below 401
MHz or above 406 MHz.

g Measurements. Compliance with the limits in paragraphs c, d and e of this section is based on the use of measurement instrumentation using a peak detector function with an instrument resolution bandwidth approximately equal to 1.0 percent of the emission bandwidth of the device under measurement.
FR Doc. 202119399 Filed 92721; 8:45 am BILLING CODE 671201P

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