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<br /> <br /> <br />S-ORD107114 Page 22 <br />AT&T Proprietary (Internal use only). Not for use or disclosure outside the AT&T companies, <br />except under written agreement. ©2023 AT&T Intellectual property. All rights reserved. <br /> <br />6 Appendix A <br />6.1 Technical Framework <br /> The FCC requires licensees to ensure that persons are not exposed to radiofrequency <br />electromagnetic energy power densities in excess of the applicable MPE (Maximum <br />Permissible Exposure) limits. These rules apply to both Occupational Personnel and <br />the General Population. Applicable FCC rules are found at 47 C.F.R. § § 1.1307(b)(3) <br />and 1.1310. The FCC rules define two tiers of permissible exposure differentiated by <br />the situation in which the exposure takes place and/or the status of the individuals <br />who are subject to exposure. <br /> General Population / uncontrolled exposure limits apply to those situations <br />in which persons may not be aware of the presence of electromagnetic energy, <br />where exposure is not employment-related, or where persons cannot exercise <br />control over their exposure. <br /> Occupational / controlled exposure limits apply to situations in which persons <br />are exposed as a consequence of their employment, have been made fully <br />aware of the potential for exposure, and can exercise control over their <br />exposure. <br /> Maximum Permissible Exposure (“MPE”) is defined in OET 65 as being 100% of the <br />exposure limits for the situation or tier of permissible exposure. These limits are listed <br />as follows: <br /> <br />Limits for Occupational/Controlled Exposure <br />Frequency <br />Range (MHz) <br />Electric <br />Field <br />Strength (E) <br />(V/m) <br />Magnetic <br />Field (H) <br />(A/m) <br />Power <br />Density (S) <br />(mW/cm2) <br />Averaging Time <br />|E|2, |H|2 or S <br />(minutes) <br />0.3-3.0 614 1.63 (100)* 6 <br />3.0-30 1842/f 4.89/f (900/f2)* 6 <br />30-300 61.5 0.163 1.0 6 <br />300-1500 -- f/300 6 <br />1500-100,000 -- 5 6 <br /> <br />Limits for General Population/Uncontrolled Exposure <br />Frequency <br />Range (MHz) <br />Electric <br />Field <br />Strength (E) <br />(V/m) <br />Magnetic <br />Field (H) <br />(A/m) <br />Power <br />Density (S) <br />(mW/cm2) <br />Averaging Time <br />|E|2, |H|2 or S <br />(minutes) <br />0.3-1.34 614 1.63 (100)* 30 <br />1.34-30 842/f 2.19/f (180/f2)* 30 <br />30-300 27.5 0.073 0.2 30 <br />300-1500 -- f/1500 30 <br />1500-100,000 -- 1.0 30 <br />f = frequency in MHz *Plane-wave equivalent power density <br />Att C - Att 5