§ 95.2579   MedRadio unwanted emissions limits.

   Unwanted emission field strength limits and attenuation requirements
   apply to each MedRadio transmitter type, as set forth in this section
   and part 2.

   (a) Field strength limits. The field strengths of unwanted emissions
   from each MedRadio transmitter type, measured at a distance of 3
   meters, must not exceed the field strength limits shown in the table in
   this paragraph for the indicated frequency ranges, if the frequencies
   of these emissions are:

   (1) More than 250 kHz outside of the 402-405 MHz band (for devices
   designed to operate in the 402-405 MHz band);

   (2) More than 100 kHz outside of either the 401-402 MHz or 405-406 MHz
   bands (for devices designed to operate in the 401-402 MHz or 405-406
   MHz bands);

   (3) In the 406.000-406.100 MHz band (for devices designed to operate in
   the 401-402 MHz or 405-406 MHz bands); or

   (4) More than 2.5 MHz outside of the 413-419 MHz, 426-432 MHz, 438-444
   MHz or 451-457 MHz bands (for devices designed to operate in these four
   bands).

   (5) More than 2.5 MHz outside of the 2360-2400 MHz band (for devices
   designed to operate in the 2360-2400 MHz band).
   Frequency range
   (MHz) Field
   strength (μV/m)
         30-88          100
         88-216         150
         216-960        200
         960 and above  500

   Note to table in paragraph (a)(5): At the boundaries between frequency
   ranges, the tighter limit (lower field strength) applies. Below 1 GHz,
   field strength is measured using a CISPR quasi-peak detector. Above 1
   GHz, field strength is measured using an average detector with a
   minimum reference bandwidth of 1 MHz. See also part 2, subpart J of
   this chapter.

   (b) Harmonic emissions. Radiated unwanted emissions from a MedRadio
   transmitter type must be measured to at least the tenth harmonic of the
   highest fundamental frequency emitted.

   (c) Attenuation requirements, 402-405 MHz. For MedRadio transmitter
   types designed to operate in the 402-405 MHz band, unwanted emissions
   must be attenuated below the maximum permitted transmitter output power
   by at least:

   (1) 20 dB, on any frequency within the 402-405 MHz band that is more
   than 150 kHz away from the center frequency of the occupied bandwidth;

   (2) 20 dB, on any frequency between 401.750 MHz and 402.000 MHz, and on
   any frequency between 405 MHz and 405.250 MHz.

   (d) Attenuation requirements, 401-402 MHz, 405-406 MHz. For MedRadio
   transmitter types designed to operate in the 401-402 MHz band or
   405-406 MHz band, the power of unwanted emissions must be attenuated
   below the transmitter output power by at least:

   (1) 20 dB, on any frequency within the 401-401.85 MHz or 405-406 MHz
   bands that is:

   (i) More than 75 kHz away from the center frequency of the occupied
   bandwidth 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 occupied
   bandwidth and 100 kHz or less below 401 MHz or above 406 MHz.

   (2) 20 dB, on any frequency between 400.900 MHz and 401.000 MHz, and on
   any frequency between 406.000 MHz and 406.100 MHz.

   (e) Attenuation requirements, 413-419 MHz, 426-432 MHz, 438-444 MHz,
   and 451-457 MHz. For MedRadio transmitter types designed to operate in
   the 413-419 MHz, 426-432 MHz, 438-444 MHz and 451-457 MHz bands: In the
   first 2.5 megahertz above or below any of the frequency bands
   authorized for Medical Micropower Network operation, the EIRP of any
   unwanted emission must be attenuated within a 1 megahertz bandwidth by
   at least 20 dB relative to the maximum EIRP within any 1 megahertz
   bandwidth of the fundamental emission.

   (f) Attenuation requirements, 2360-2400 MHz. For MedRadio transmitter
   types designed to operate in the 2360-2400 MHz band: In the first 2.5
   megahertz above or below any of the frequency bands authorized for MBAN
   operation, the EIRP of any unwanted emission must be attenuated within
   a 1 megahertz bandwidth by at least 20 dB relative to the maximum EIRP
   within any 1 megahertz bandwidth of the fundamental emission.

   (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
   reference bandwidth approximately equal to 1.0 percent of the emission
   bandwidth of the device under measurement.

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