Report 2 of 2

FCC ID: QOQWT41

Test Report

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FCCID_1433980

Radio Test Report: 9F2925WUS2

Appendix C: Additional Test and Sample Details

This appendix contains details of:

1. The samples submitted for testing.
2. Details of EUT operating mode(s)
3. Details of EUT configuration(s) (see below).
4. EUT arrangement (see below).

Throughout testing, the following numbering system is used to identify the sample and it's
modification state:

Sample No: Sxx Mod w

where:

xx = sample number eg. S01
w = modification number eg. Mod 2

The following terminology is used throughout the test report:

Support Equipment (SE) is any additional equipment required to exercise the EUT in the
applicable operating mode. Where relevant SE is divided into two categories:

SE in test environment: The SE is positioned in the test environment and is not isolated from the
EUT (e.g. on the table top during REFE testing).

SE isolated from the EUT: The SE is isolated via filtering from the EUT. (e.g. equipment placed
externally to the ALSR during REFE testing).

EUT configuration refers to the internal set-up of the EUT. It may include for example:

Positioning of cards in a chassis.
Setting of any internal switches.
Circuit board jumper settings.
Alternative internal power supplies.

Where no change in EUT configuration is possible, the configuration is described as “single
possible configuration”.

EUT arrangement refers to the termination of EUT ports / connection of support equipment, and
where relevant, the relative positioning of samples (EUT and SE) in the test environment.

For further details of the test procedures and general test set ups used during testing please refer
to the related document "EMC Test Methods - An Overview", which can be supplied by TRaC
Telecoms & Radio upon request.

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C1) Test samples

The following samples of the apparatus were submitted by the client for testing :

Sample No. Description Identification
S18 WT41-A (Conducted Sample) None
WT41-A with PCB antenna
S20 S/N: 101206
Murata ANGC12G44SAA145
WT41-N antenna with external
S21 S/N: 101202
Pulse W1010

See Appendix D for antenna data sheets

The following samples of apparatus were supplied by TRaC Telecoms & Radio as support or
drive equipment (auxiliary equipment):

Identification Description
RFG464 dc Power Supply
REF829 N4010A Wireless connectivity Test Set

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C2) EUT Operating Mode During Testing.

During testing, the EUT was exercised as described in the following tables :

Test Description of Operating Mode

EUT active transmitting, operating at 1Mbps, 2Mbps and 3Mbps data
All Transmitter tests detailed
rates and on highest middle and lowest operating frequencies at each
in this report
data rate.

Test Description of Operating Mode:

Receiver conducted and
EUT active but non-transmitting.
radiated spurious emissions

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C3) EUT Configuration Information.

The EUT was submitted for testing in one single possible configuration.

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C4) List of EUT Ports

The tables below describe the termination of EUT ports:

Sample : S18
Tests : Conducted

Port Description of Cable Attached Cable length Equipment Connected
Antenna None N/A REF909
dc Power Port 2 core unscreened 2m REF053

Sample : S20
Tests : Radiated Emissions

Port Description of Cable Attached Cable length Equipment Connected
dc Power Port 2 core unscreened 2m RFG464

Sample : S21
Tests : Radiated Emissions

Port Description of Cable Attached Cable length Equipment Connected
Antenna None N/A
dc Power Port 2 core unscreened 2m RFG464

* Only connected during setup.

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For Power Line Conducted Measurements

RFG No Type Description Manufacturer Date Calibrated
404 E4407B Spectrum Analyser Agilent 10/05/10
125 ESHS10 Test receiver R&S 23/11/10
232 ESH2-Z5 LISN R&S 22/05/10
674 0357.8810.54 Pulse Limiter R&S 08/07/11
296 BNC Cable TRaC 17/09/10
298 BNC Cable TRaC 17/09/10

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Appendix E: Calculation of the duty cycle correction factor

Using a spectrum analyser in zero span mode, centred on the fundamental carrier frequency with
a RBW of 1MHz and a video Bandwidth of 1MHz the sweep time was set accordingly to capture
the pulse train. The transmit pulsewidths and period was measured. A plots of the pulse train is
contained in Appendix B of this test report.

If the pulse train was less than 100 ms, including blanking intervals, the duty cycle was calculated
by averaging the sum of the pulsewidths over one complete pulse train. However if the pulse train
exceeds 100ms then the duty cycle was calculated by averaging the sum of the pulsewidths over
the 100ms width with the highest average value. (The duty cycle is the value of the sum of the
pulse widths in one period (or 100ms), divided by the length of the period (or 100ms). The duty
cycle correction factor was then expressed in dB and the peak emissions adjusted accordingly to
give an average value of the emission.

Correction factor dB = 20 x (Log10 Calculated Duty Cycle)

Therefore the calculated duty cycle was determined:

The pulse train period was greater than >100ms and in as shown from the plots in contained in
appendix B of this test report.

Duty cycle = the sum of the highest average value pulsewidths over 100ms
100ms

e.g

7.459ms
0.07459
100ms

0.07459 or 7.459%

Correction factor (dB) = 20 x (Log10 0.07459) = -22.54dB

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Appendix F: Photographs and Figures

The following photographs were taken of the test samples:

1. Radiated emissions Overview: Front view WT41-A
2. Radiated emissions Overview: Back view WT41-A
3. Radiated emissions Overview: Front view WT41-N
4. Radiated emissions Overview: Back view WT41-N
5. Photo of the WT41-A top overview
6. Photo of the WT41-A bottom overview
7. Photo of the WT41-N top overview
8. Photo of the WT41-N bottom overview

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Document Created: 2011-03-18 11:45:24
Document Modified: 2011-03-18 11:45:24

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