User Manual

FCC Test Report
Report No. : FR442525
SPORTON INTERNATIONAL INC. Page No. : 23 of 57
TEL : [phone] Report Version : Rev. 01
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3.4 Power Spectral Density
3.4.1 Power Spectral Density Limit
Power Spectral Density Limit
Power Spectral Density (PSD) ≤ 8 dBm/3kHz
3.4.2 Measuring Instruments
Refer a test equipment and calibration data table in this test report.
3.4.3 Test Procedures
Test Method
Peak power spectral density procedures that the same method as used to determine the conducted
output power. If maximum peak conducted output power was measured to demonstrate compliance to
the output power limit, then the peak PSD procedure below (Method PKPSD) shall be used. If maximum
conducted output power was measured to demonstrate compliance to the output power limit, then one
of the average PSD procedures shall be used, as applicable based on the following criteria (the peak
PSD procedure is also an acceptable option).
Refer as FCC KDB 558074, clause 10.2 Method PKPSD (RBW=3-100kHz;detector=peak)..
[duty cycle ≥ 98% or external video / power trigger]
Refer as FCC KDB 558074, clause 10.3 Method AVGPSD-1 (spectral trace averaging).
Refer as FCC KDB 558074, clause 10.4 Method AVGPSD-1 Alt. (slow sweep speed)
duty cycle < 98% and average over on/off periods with duty factor
Refer as FCC KDB 558074, clause 10.5 Method AVGPSD-2 (spectral trace averaging).
Refer as FCC KDB 558074, clause 10.6 Method AVGPSD-2 Alt. (slow sweep speed)
For conducted measurement.
The EUT supports single transmit chain and measurements performed on this transmit chain
port 1.
The EUT supports diversity transmitting and the results on transmit chain port 1 is the worst case.
The EUT supports multiple transmit chains using options given below:
Option 1: Measure and sum the spectra across the outputs. Refer as FCC KDB 662911,
In-band power spectral density (PSD). Sample all transmit ports simultaneously using a
spectrum analyzer for each transmit port. Where the trace bin-by-bin of each transmit port
summing can be performed. (i.e., in the first spectral bin of output 1 is summed with that in the
first spectral bin of output 2 and that from the first spectral bin of output 3, and so on up to the
N
TX
output to obtain the value for the first frequency bin of the summed spectrum.). Add up the
amplitude (power) values for the different transmit chains and use this as the new data trace.
Option 2: Measure and add 10 log(N) dB, where N is the number of transmit chains. Refer as
FCC KDB 662911, In-band power spectral density (PSD). Performed at each transmit chains
and each transmit chains shall be compared with the limit have been reduced with 10 log(N).
Or each transmit chains shall be add 10 log(N) to compared with the limit.