User Manual

MOTOROLA IN CONFIDENCE
phn_1151 000V001 10/03/2008 Page 5 of 5
In the case of PTP 54500/PTP54300
Channel BW = 15 MHz.
Allowance for source-based time-averaging: Maximum Tx duty cycle = 50% or -
3.0dB
Allowed EIRP = 11 + 11.76 - Actual Antenna Gain + 6 + Actual Antenna Gain
= 28.76 dBm
EIRP used for MPE calculation = 27.78 -3.0 = 25.76 dBm or 376mW
5.2 Radiation Levels
The table below shows the result of calculating the radiated power density using the
formula given in Ref [1] at a distance of 20cm from the antenna and confirms that the
power density level is below the limit given in Ref [1] for general population/
uncontrolled environments at that distance.
Total EIRP in burst 25.76 dBm
Less TDD duty cycle -3.0 dB
Total Mean EIRP 376 mW
Power Density Limit 1 mW/cm2
Radiated Density at 20cm 0.0748 mW/cm2
6 Conclusion
The equipment meets the limit for general population exposure at a distance of 20cm
with a margin of over 10dB. This margin has been calculated using the FCC’s
maximum EIRP limit and the PTP54500/PTP54300 do not exceed that limit.
.