§ 15.519   Technical requirements for hand held UWB systems.

   (a) UWB devices operating under the provisions of this section must be hand
   held, i.e., they are relatively small devices that are primarily hand held
   while being operated and do not employ a fixed infrastructure.

   (1)  A UWB device operating under the provisions of this section shall
   transmit only when it is sending information to an associated receiver. The
   UWB intentional radiator shall cease transmission within 10 seconds unless
   it  receives  an acknowledgement from the associated receiver that its
   transmission is being received. An acknowledgment of reception must continue
   to be received by the UWB intentional radiator at least every 10 seconds or
   the UWB device must cease transmitting.

   (2)  The use of antennas mounted on outdoor structures, e.g., antennas
   mounted on the outside of a building or on a telephone pole, or any fixed
   outdoors infrastructure is prohibited. Antennas may be mounted only on the
   hand held UWB device.

   (3) UWB devices operating under the provisions of this section may operate
   indoors or outdoors.

   (b) The UWB bandwidth of a device operating under the provisions of this
   section must be contained between 3100 MHz and 10,600 MHz.

   (c) The radiated emissions at or below 960 MHz from a device operating under
   the provisions of this section shall not exceed the emission levels in
   § 15.209. The radiated emissions above 960 MHz from a device operating under
   the provisions of this section shall not exceed the following average limits
   when measured using a resolution bandwidth of 1 MHz:
   Frequency in MHz EIRP in dBm
   960-1610               −75.3
   1610-1990              −63.3
   1990-3100              −61.3
   3100-10600             −41.3
   Above 10600             −61.3

   (d) In addition to the radiated emission limits specified in the table in
   paragraph  (c)  of  this section, UWB transmitters operating under the
   provisions of this section shall not exceed the following average limits
   when measured using a resolution bandwidth of no less than 1 kHz:
   Frequency in MHz EIRP in dBm
   1164-1240              −85.3
   1559-1610               −85.3

   (e) There is a limit on the peak level of the emissions contained within a
   50 MHz bandwidth centered on the frequency at which the highest radiated
   emission occurs, fM. That limit is 0 dBm EIRP. It is acceptable to employ a
   different  resolution  bandwidth, and a correspondingly different peak
   emission limit, following the procedures described in § 15.521.

   [ 67 FR 34856 , May 16, 2002;  67 FR 39632 , June 10, 2002]

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