S06 - Amendment 0003 - Attachment One - Frequency Range - RF Shielding.pdf

• (U//FOUO) Perform plane-wave attenuation tests for 597 linearly distributed frequencies across the range 30 MHz to 6 GHz. Step size should be 10MHz (i.e. 30 MHz, 40, 50, [ ... ], 5980

,5990, 6000 MHz)

• (U//FOUO) An average of 38 dB of attenuation should be achieved with the additional thresholds below also met o (U//FOUO) 90% or more of measurements must meet or exceed the attenuation criteria of 38dB o {U//FOUO) No more than 5% of the attenuation measurements may fail by more than

BdB [95% or more must be above 30dB] o (U//FOUO) No more than 2% of the attenuation measurements may fail by more than

20d8 [98% or more must above 18dB]

• (U) Test locations (17 total) should be distributed (specifically for this site} as follows (roughly following IEEE-299 spacing of 2.6 meters (8.6ft]);

o (U} Only one polarization needed at each test location, however recommend alternating for every other shot. Reference shots should reflect the corresponding polarization.

• {U) Achieve 1.7m (5' 7") of separation from test surface when possible. Never test under lm [39"] from the RF surface.

o (U) 4 Shots distributed evenly across the plan north and south walls starting at no more than 1.85m [6ft] from the east/west walls o (U) 2 shots distributed evenly across the west wall (side opposite the doors into the

SCIF)

o {U3 shots on the east walls- (1 for each door, 1 in the section in between) -recommend testing each door with different polarization o (U} 4 shots from the center of the room to the rooftop, spaced at the same intervals used for north and south