Test Report

FCC ID: OMO-M-05

Test Report

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Page 1 of 25

FCC CERTIFICATION
On Behalf of
La Crosse Technology

Rain Sensor
Model No.: TX58U-IT

FCC ID: OMO-M-05

Prepared for : La Crosse Technology
Address : 2809 Losey Blvd. So. La Crosse WI 54601, USA

Prepared by : ACCURATE TECHNOLOGY CO. LTD
Address : F1, Bldg. A, Changyuan New Material Port, Keyuan Rd.
Science & Industry Park, Nanshan, Shenzhen, Guangdong
P.R. China

Tel: (0755) 26503290
Fax: (0755) 26503396

Report Number : ATE20091797
Date of Test : October 14-16, 2009
Date of Report : October 30, 2009

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 2 of 25

TABLE OF CONTENTS

Description Page

Test Report Certification
1. GENERAL INFORMATION .......................................................................................................... 4
1.1. Description of Device (EUT)....................................................................................................................4
1.2. Description of Test Facility ......................................................................................................................4
1.3. Measurement Uncertainty.........................................................................................................................5
2. MEASURING DEVICE AND TEST EQUIPMENT ..................................................................... 6
3. SUMMARY OF TEST RESULTS................................................................................................... 7
4. FUNDAMENTAL AND HARMONICS RADIATED EMISSION FOR SECTION 15.249(A) 8
4.1. Block Diagram of Test Setup....................................................................................................................8
4.2. The Emission Limit ..................................................................................................................................9
4.3. Configuration of EUT on Measurement ...................................................................................................9
4.4. Operating Condition of EUT ....................................................................................................................9
4.5. Test Procedure ........................................................................................................................................10
4.6. The Field Strength of Radiation Emission Measurement Results ..........................................................11
5. SPURIOUS RADIATED EMISSION FOR SECTION 15.249(D) ............................................. 12
5.1. Block Diagram of Test Setup..................................................................................................................12
5.2. The Emission Limit For Section 15.249(d) ............................................................................................13
5.3. EUT Configuration on Measurement .....................................................................................................13
5.4. Operating Condition of EUT ..................................................................................................................13
5.5. Test Procedure ........................................................................................................................................14
5.6. The Emission Measurement Result ........................................................................................................15
6. BAND EDGES ................................................................................................................................. 16
6.1. The Requirement ....................................................................................................................................16
6.2. EUT Configuration on Measurement .....................................................................................................16
6.3. Operating Condition of EUT ..................................................................................................................16
6.4. Test Procedure ........................................................................................................................................16
6.5. The Measurement Result ........................................................................................................................17
7. ANTENNA REQUIREMENT........................................................................................................ 18
7.1. The Requirement ....................................................................................................................................18
7.2. Antenna Construction .............................................................................................................................18

APPENDIX I ( TEST CURVES) (6 pages)

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 4 of 25

1. GENERAL INFORMATION

1.1.Description of Device (EUT)
EUT : Rain Sensor

Model Number : TX58U-IT

Power Supply : 3V DC (“AA” batteries 2×)

Transmitting Frequency : 906MHz

Applicant : La Crosse Technology
Address : 2809 Losey Blvd. So. La Crosse WI 54601, USA

Manufacturer : Golden ESL Instrument (S.Z.) Co. Ltd.
Address : Fu Yuan #2 Manufactory Building, 45 Area of Baoan
District, ShenZhen, China

Date of sample received : October 13, 2009

Date of Test : October 14-16, 2009

1.2.Description of Test Facility
EMC Lab : Accredited by TUV Rheinland Shenzhen

Listed by FCC
The Registration Number is 752051

Listed by Industry Canada
The Registration Number is 5077A-2

Accredited by China National Accreditation Committee
for Laboratories
The Certificate Registration Number is L3193

Name of Firm : ACCURATE TECHNOLOGY CO. LTD
Site Location : F1, Bldg. A, Changyuan New Material Port, Keyuan Rd.
Science & Industry Park, Nanshan, Shenzhen, Guangdong
P.R. China

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 5 of 25

1.3.Measurement Uncertainty
Conducted Emission Expanded Uncertainty = 2.23dB, k=2

Radiated emission expanded uncertainty = 3.08dB, k=2
(9kHz-30MHz)

Radiated emission expanded uncertainty = 4.42dB, k=2
(30MHz-1000MHz)

Radiated emission expanded uncertainty = 4.06dB, k=2
(Above 1GHz)

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 6 of 25

2. MEASURING DEVICE AND TEST EQUIPMENT
Table 1: List of Test and Measurement Equipment
Kind of equipment Manufacturer Type S/N Calibrated until
EMI Test Receiver Rohde&Schwarz ESCS30 100307 03.28.2010
EMI Test Receiver Rohde&Schwarz ESPI3 101526/003 03.28.2010
Spectrum Analyzer Agilent E7405A MY45115511 03.28.2010
Pre-Amplifier Rohde&Schwarz CBLU118354 3791 03.30.2010
0-01
Loop Antenna Schwarzbeck FMZB1516 1516131 03.28.2010
Bilog Antenna Schwarzbeck VULB9163 9163-323 03.28.2010
Horn Antenna Schwarzbeck BBHA9120D 9120D-655 12.19.2009
Horn Antenna Schwarzbeck BBHA9170 9170-359 10.09.2010
LISN Rohde&Schwarz ESH3-Z5 100305 03.28.2010
LISN Schwarzbeck NSLK8126 8126431 03.28.2010

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 7 of 25

3. SUMMARY OF TEST RESULTS

FCC Rules Description of Test Result
Section 15.207 Conducted Emission N/A
Section 15.249(a) Fundamental and Harmonics Radiated Emission Compliant
Section 15.249(d) Spurious Radiated Emission Compliant
Section 15.249(d) Band Edge Compliant
Section 15.203 Antenna Requirement Compliant

Remark: “N/A” means “Not applicable”.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 8 of 25

4. FUNDAMENTAL AND HARMONICS RADIATED EMISSION

FOR SECTION 15.249(A)

4.1.Block Diagram of Test Setup
4.1.1.Block diagram of connection between the EUT and simulators

EUT

(EUT: Rain Sensor)

4.1.2.Semi-Anechoic Chamber Test Setup Diagram

ANTENNA ELEVATION VARIES FROM 1 TO 4 METERS

3 METERS

EUT

Cable
0.8 METER

GROUND PLANE

(EUT: Rain Sensor)

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 9 of 25

4.2.The Emission Limit
4.2.1.For intentional radiators, According to section 15.249(a), Operation within the
frequency band of 902 to 928MHz, The fundamental field strength shall not
exceed 94 dBμV/m and the harmonics shall not exceed 54 dBμV/m.
Fundamental Field Strength of Fundamental Field Strength of harmonics
Frequency (millivolts/meter) (microvolts/meter)
902-928MHz 50 500
2400-2483.5MHz 50 500
5725-5875MHz 50 500
24.0-24.25GHz 250 2500
4.2.2.According to section 15.249(e), as shown in section 15.35(b), the peak field
strength of any emission shall not exceed the maximum permitted average limits
specified above by more than 20 dB under any condition of modulation.

4.3.Configuration of EUT on Measurement
The following equipment are installed on Radiated Emission Measurement to meet the
commission requirements and operating regulations in a manner which tends to maximize
its emission characteristics in normal application.
4.3.1.Rain Sensor (EUT)
Model Number : TX58U-IT
Serial Number : N/A
Manufacturer : Golden ESL Instrument (S.Z.) Co. Ltd.

4.4.Operating Condition of EUT
4.4.1.Setup the EUT and simulator as shown as Section 4.1.

4.4.2.Turn on the power of all equipment.

4.4.3. Let the EUT work in TX mode measure it. The transmit frequency is 906MHz.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 10 of 25

4.5.Test Procedure
The EUT and its simulators are placed on a turntable, which is 0.8 meter high above
ground. The turntable can rotate 360 degrees to determine the position of the maximum
emission level. EUT is set 3.0 meters away from the receiving antenna, which is mounted
on an antenna tower. The antenna can be moved up and down between 1.0 meter and 4
meters to find out the maximum emission level. Broadband antenna (calibrated bilog
antenna) is used as receiving antenna. Both horizontal and vertical polarizations of the
antenna are set on measurement. In order to find the maximum emission levels, all of the
interface cables must be manipulated according to ANSI C63.4: 2003 on radiated
emission measurement.

The bandwidth of test receiver is set at 120kHz in 30-1000MHz. and set at 1MHz in
above 1000MHz.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 11 of 25

4.6.The Field Strength of Radiation Emission Measurement Results
PASS.

Date of Test: October 14-16, 2009 Temperature: 25oC
EUT: Rain Sensor Humidity: 50%
Model No.: TX58U-IT Power Supply: 3V DC (“AA” batteries 2×)
Test Mode: TX 906MHz Test Engineer: Joe

Fundamental Radiated Emissions

Frequency Reading(dBμV/m) Factor(dB) Result(dBμV/m) Limit(dBμV/m) Margin(dB) Polarization

(MHz) AV PEAK Corr. AV PEAK AV PEAK AV PEAK
905.9896 48.24 49.84 28.80 77.04 78.64 94 114 -16.96 -35.36 Vertical
905.9896 52.03 53.66 28.80 80.83 82.46 94 114 -13.17 -31.54 Horizontal

Harmonics Radiated Emissions

Frequency Reading(dBμV/m) Factor(dB) Result(dBμV/m) Limit(dBμV/m) Margin(dB) Polarization

(MHz) AV PEAK Corr. AV PEAK AV PEAK AV PEAK
1811.991 55.16 56.79 -9.92 45.24 46.87 54 74 -8.76 -27.13 Vertical
2717.983 50.19 55.16 -6.25 42.32 43.94 54 74 -11.68 -30.06 Vertical
4529.976 42.92 44.51 -1.25 41.67 43.26 54 74 -12.33 -30.74 Vertical
1811.991 51.66 53.29 -9.92 41.74 43.37 54 74 -12.26 -30.63 Horizontal
2717.983 50.43 52.32 -6.25 44.18 46.07 54 74 -9.82 -27.93 Horizontal
4529.976 45.56 47.13 -1.25 44.31 45.88 54 74 -9.69 -28.12 Horizontal

Note:
1. Emissions attenuated more than 20 dB below the permissible value are not reported.
2. The field strength is calculated by adding the antenna factor, high pass filter loss(if used) and cable loss, and
subtracting the amplifier gain(if any)from the measured reading. The basic equation calculation is as follows:
Result = Reading + Corrected Factor
Where Corrected Factor = Antenna Factor + Cable Loss + High Pass Filter Loss – Amplifier Gain
3. The spectral diagrams in appendix I display the measurement of peak values.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 12 of 25

5. SPURIOUS RADIATED EMISSION FOR SECTION 15.249(D)

5.1.Block Diagram of Test Setup
5.1.1.Block diagram of connection between the EUT and simulators

EUT

(EUT: Rain Sensor)

5.1.2.Semi-Anechoic Chamber Test Setup Diagram

ANTENNA ELEVATION VARIES FROM 1 TO 4 METERS
3 METERS

EUT

Cable
0.8 METER

GROUND PLANE

(EUT: Rain Sensor)

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 13 of 25

5.2.The Emission Limit For Section 15.249(d)
5.2.1.Emission radiated outside of the specified frequency bands, except for harmonics,
shall be comply with the general radiated emission limits in Section 15.209.
Radiation Emission Measurement Limits According to Section 15.209
Limit
Frequency Field Strength of Field Strength of The final measurement
Quasi-peak Value Quasi-peak Value in band 9-90kHz,
(MHz)
(microvolts/m) (dBμV/m) 110-490kHz and
above 1000MHz is
30 - 88 100 40 performed with
Average detector.
Except those
88 - 216 150 43.5 frequency bands
mention above, the
final measurement for
216 - 960 200 46
frequencies below
1000MHz is
Above 960 500 54 performed with Quasi
Peak detector.

5.3.EUT Configuration on Measurement
The following equipment are installed on the Radiated Emission Measurement to meet
the commission requirements and operating regulations in a manner which tends to
maximize its emission characteristics in normal application.
5.3.1.Rain Sensor (EUT)
Model Number : TX58U-IT
Serial Number : N/A
Manufacturer : Golden ESL Instrument (S.Z.) Co. Ltd.

5.4.Operating Condition of EUT
5.4.1.Setup the EUT and simulator as shown as Section 5.1.

5.4.2.Turn on the power of all equipment.

5.4.3. Let the EUT work in TX mode measure it. The transmit frequency is 906MHz.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 14 of 25

5.5.Test Procedure
The EUT and its simulators are placed on a turntable, which is 0.8 meter high above
ground. The turntable can rotate 360 degrees to determine the position of the maximum
emission level. EUT is set 3.0 meters away from the receiving antenna, which is mounted
on an antenna tower. The antenna can be moved up and down between 1.0 meter and 4
meters to find out the maximum emission level. Broadband antenna (calibrated bilog
antenna) is used as receiving antenna. Both horizontal and vertical polarizations of the
antenna are set on measurement. In order to find the maximum emission levels, all of the
interface cables must be manipulated according to ANSI C63.4: 2003 on radiated
emission measurement.

The bandwidth of test receiver is set at 120kHz in 30-1000MHz. and set at 1MHz in
above 1000MHz.

The frequency range from 30MHz to 10000MHz is checked.

The final measurement in band 9-90kHz, 110-490kHz and above 1000MHz is performed
with Average detector. Except those frequency bands mention above, the final
measurement for frequencies below 1000MHz is performed with Quasi Peak detector.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 15 of 25

5.6.The Emission Measurement Result

PASS.

Date of Test: October 14-16, 2009 Temperature: 25oC
EUT: Rain Sensor Humidity: 50%
Model No.: TX58U-IT Power Supply: 3V DC (“AA” batteries 2×)
Test Mode: TX 906MHz Test Engineer: Joe

Frequency Reading Factor(dB) Result Limit Margin Polarization
(MHz) (dBμV/m) Corr. (dBμV/m) (dBμV/m) (dB)
QP QP QP QP
- - - - - - Vertical
- - - - - - Horizontal

Note:
1. Emissions attenuated more than 20 dB below the permissible value are not reported.
2. The field strength is calculated by adding the antenna factor, high pass filter loss(if used) and cable loss, and
subtracting the amplifier gain(if any)from the measured reading. The basic equation calculation is as follows:
Result = Reading + Corrected Factor
Where Corrected Factor = Antenna Factor + Cable Loss + High Pass Filter Loss – Amplifier Gain
3. The spectral diagrams in appendix I display the measurement of peak values.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 16 of 25

6. BAND EDGES

6.1.The Requirement
6.1.1.Band Edge from 902MHz to 928MHz. Emission radiated outside of the specified
frequency bands, except for harmonics, shall be attenuated by at least 50 dB
below the level of the fundamental or to the general radiated emission limits in
Section 15.209, whichever is the lesser attenuation.

6.2.EUT Configuration on Measurement
The following equipment are installed on the emission measurement to meet the
commission requirements and operating regulations in a manner which tends to maximize
its emission characteristics in normal application.
6.2.1.Rain Sensor (EUT)
Model Number : TX58U-IT
Serial Number : N/A
Manufacturer : Golden ESL Instrument (S.Z.) Co. Ltd.

6.3.Operating Condition of EUT
6.3.1.Setup the EUT and simulator as shown as Section 4.1.

6.3.2.Turn on the power of all equipment.

6.3.3. Let the EUT work in TX mode measure it. The transmit frequency is 906MHz.

6.4.Test Procedure
The EUT and its simulators are placed on a turntable, which is 0.8 meter high above
ground. The turntable can rotate 360 degrees to determine the position of the maximum
emission level. EUT is set 3.0 meters away from the receiving antenna, which is mounted
on an antenna tower. The antenna can be moved up and down between 1.0 meter and 4
meters to find out the maximum emission level. Broadband antenna (calibrated bilog
antenna) is used as receiving antenna. Both horizontal and vertical polarizations of the
antenna are set on measurement. In order to find the maximum emission levels, all of the
interface cables must be manipulated according to ANSI C63.4: 2003 on radiated
emission measurement.

The bandwidth of test receiver is set at 120kHz in 30-1000MHz. and set at 1MHz in
above 1000MHz.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 17 of 25

6.5.The Measurement Result

Pass.

Date of Test: October 15, 2009 Temperature: 25oC
EUT: Rain Sensor Humidity: 50%
Model No.: TX58U-IT Power Supply: 3V DC (“AA” batteries 2×)
Test Mode: TX 906MHz Test Engineer: Joe

Frequency Reading Factor(dB) Result Limit Margin Polarization
(MHz) (dBμV/m) Corr. (dBμV/m) (dBμV/m) (dB)
QP QP QP QP
- - - - - - Vertical
- - - - - - Horizontal

Note:
1. Emissions attenuated more than 20 dB below the permissible value are not reported.
2. The field strength is calculated by adding the antenna factor, high pass filter loss(if used) and cable loss, and
subtracting the amplifier gain(if any)from the measured reading. The basic equation calculation is as follows:
Result = Reading + Corrected Factor
Where Corrected Factor = Antenna Factor + Cable Loss + High Pass Filter Loss – Amplifier Gain
3. The spectral diagrams in appendix I display the measurement of peak values.

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Page 19 of 25

APPENDIX I
(Test Curves)

FCC ID: OMO-M-05 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20091797

Document Created: 2009-11-09 17:33:34
Document Modified: 2009-11-09 17:33:34

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