Quanta Computer HFSWM100, Emi Test Report

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ETC Report No. : ET90S-11-032 Sheet 4 of 104 Sheets
FCC ID. : HFSWM100
Rev. No 1.0
(4) Bandwidth Requirement
For direct sequence system, according to 15.247(a)(2), the minimum 6dB bandwidth
shall be at least 500 kHz.
(5) Output Power Requirement
For direct sequence system, according to 15.247(b), the maximum peak output power of
the transmitter shall not exceed 1 Watt. If transmitting antennas of directional gain
greater than 6 dBi are used, the power shall be reduced by the amount in dB that the
directional gain of the antenna exceeds 6 dBi.
(6) 100 kHz Bandwidth of Frequency Band Edges Requirement
According to 15.247(c), if any 100 kHz bandwidth outside these frequency bands, the
radio frequency power that is produced by the modulation products of the spreading
sequence, the information sequence and the carrier frequency shall be either at least 20
dB below that in any 100 kHz bandwidth within the band that contains the highest level
of the desired power or shall not exceed the general levels specified in 15.209(a),
whichever results in the lesser attenuation.
(7) Power Density Requirement
According to 15.247(d), for direct sequence systems, the transmitted power density
averaged over any 1 second interval shall not be greater than 8 dBm in any 3 kHz
bandwidth within these bands.
(8) Processing Gain Requirement
According to 15.247(e), the processing gain of a direct sequence system shall be at least
10 dB. The processing gain shall be determined from the ratio in dB of the signal to noise
ratio with the system spreading code turned off to the signal to noise ratio with the
system spreading code turned on, as measured at the demodulated output of the receiver.