Intertek MBU 400 - Peak Transmit Power

INTERTEK TESTING SERVICES
Test Report Number: HK08060834-1 Page 21 of 72
FCC ID: T7HCT8015
Company: RTX Consumer Products Hong Kong Ltd. Date of Test: June 24-July 7, 2008
Model: MBU 400
4.5 Peak Transmit Power, FCC Rule 15.319(c):
The peak transmit power (P
EUT
) shall not exceed 100µW multiplied by the square root of
the emission bandwidth (B) in Hz or 5 log
10
B – 10 dBm. The peak transmit power shall be
reduced by the amount in dB that the maximum directional gain of the antenna exceeds 3
dBi.
Measurements are made in accordance with ANSI C63.17 sub-clause 6.1.2. Test setup is
shown in section 3.2 Figure 3.2.1. The cable loss and/or external attenuation are included
in OFFSET function of spectrum analyzer.
Calculation of Peak Transmit Power Limit (P
max
):
[ × ]
P
max
= 5 log
10
B – 10 dBm
when G
A
≤ 3dBi
[ × ]
P
max
= 5 log
10
B – 10 dBm – (G
A
– 3dBi) when G
A
> 3dBi
Where G
A
= EUT Antenna Gain: 0 dBi
B
= Measured Emission Bandwidth: (26dB down BW) in Hz
Test Results:
I. Traffic Carrier
Channel Channel Frequency
(MHz)
Measured Peak Transmit
Power (dBm)
Limit
(dBm)
Results
Lowest 1921.536 19.27 20.81 Pass
Highest 1928.448 19.05 20.79 Pass
II. Dummy Carrier
Channel Channel Frequency
(MHz)
Measured Peak Transmit
Power (dBm)
Limit
(dBm)
Results
Lowest 1921.536 19.24 20.65 Pass
Highest 1928.448 19.02 20.62 Pass
Please refer to the attached plots for more details:
Plot 2A: Lowest Channel Peak Transmit Power (Traffic Carrier)
Plot 2B: Highest Channel Peak Transmit Power (Traffic Carrier)
Plot 2C: Lowest Channel Peak Transmit Power (Dummy Carrier)
Plot 2D: Highest Channel Peak Transmit Power (Dummy Carrier)
The plots of peak transmit power are saved as filename: peaktp.pdf