User's Manual

Registration number: W6M21409-14450-C-1
FCC ID: SU7300MCD21V2-CG
Worldwide Testing Services(Taiwan) Co., Ltd Page 12 of 19
3.3 Out of Band Radiated Emissions
FCC Rule: 15.231(b) , 15.35
For out of band emissions that are close to or that exceed the 20 dB attenuation requirement
described in the specification, radiated measurements were performed at a 3 m separation distance
to determine whether these emissions complied with the general radiated emission requirement.
Guidance on Measurement of pulsed emission: 15.35(c)
“the measurement field strength shall be determined by averaging over one complete pulse train,
including blanking intervals, as long as the pulse train does not exceed 0.1 seconds. As an alternative
(provided the transmitter operates for longer than 0.1 seconds) or in cases where the pulse train exceeds
0.1 seconds, the measured field strength shall be determined from the average absolute voltage during a
0.1 second interval during which the field strength is at its maximum value.”
Duty Cycle correction = 20 log (dwell time/100ms or one period)
Limits:
For frequencies (Average measurements)
Correction factor conform 15.35 (c) (Average measurements)
Duty cycle correction :
Max. Peak reading – duty cycle correction
Max permitted average Limits = Max permitted Fundamental limit – 20 dB
For example for 300 fundamental carrier:
Max permitted average Limit: 74.67 dBµV/m - 20 dB= 54.67 dBµV/m
For frequencies above 1GHz (Peak measurements).
Modified Limits for peak conform 15.35 (b) = Max Permitted average Limits + 20dB (because Peak
detector is used)
Explanation: See attached diagrams in appendix.
Test equipment used: ETSTW-RE 004, ETSTW-RE 030, ETSTW-RE 111,