Test Report

FCC ID: LS3-20-24HFSS-1-0

Test Report

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FCCID_58490

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 2
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

TABLE OF CONTENTS
1. EXHIBIT 1 - SUMMARY OF TEST RESULTS & GENERAL STATEMENT OF CERTIFICATION.........3

2. EXHIBIT 2 - GENERAL INFORMATION........................................................................................................4
2.1. APPLICANT......................................................................................................................................................4
2.2. MANUFACTURER (OF RADIO TRANSMITTER) .....................................................................................................4
2.3. DESCRIPTION OF EQUIPMENT UNDER TEST ........................................................................................................4
2.4. RELATED SUBMITTAL(S)/GRANT ......................................................................................................................5
2.5. TEST METHODOLOGY ......................................................................................................................................5
2.6. TEST FACILITY ................................................................................................................................................5
2.7. UNITS OF MEASUREMENTS ...............................................................................................................................5
3. EXHIBIT 3 - SYSTEM TEST CONFIGURATION ...........................................................................................6
3.1. TEST SYSTEM DETAILS ....................................................................................................................................6
3.2. BLOCK DIAGRAMS FOR RADIATED EMISSION MEASUREMENTS ...........................................................................6
3.3. PHOTOGRAPH FOR RF EMISSION MEASUREMENTS .............................................................................................7
3.4. JUSTIFICATION ................................................................................................................................................8
3.5. EUT OPERATING CONDITION...........................................................................................................................8
3.6. SPECIAL ACCESSORIES .....................................................................................................................................8
3.7. EQUIPMENT MODIFICATIONS............................................................................................................................8
4. EXHIBIT 4 - TEST DATA ..................................................................................................................................9
4.1. TRANSMITTER FUNDAMENTAL & HARMONIC RADIATED EMISSIONS @ FCC CFR 47, PARA 15.249(A)...............9
5. EXHIBIT 5 - GENERAL TEST PROCEDURES .............................................................................................19
5.1. ELECTRICAL FIELD RADIATED EMISSIONS MEASUREMENTS - GENERAL TEST METHOD.....................................19
6. EXHIBIT 6 - INFORMATION RELATED TO EQUIPMENT UNDER TESTS............................................21
6.1. FCC ID LABELING AND SKETCH OF FCC LABEL LOCATION ............................................................................21
6.2. PHOTOGRAPHS OF EQUIPMENT UNDER TEST ....................................................................................................21
6.3. SYSTEM BLOCK DIAGRAM(S) .........................................................................................................................21
6.4. SCHEMATIC DIAGRAMS ..................................................................................................................................21
6.5. USERS’ MANUAL WITH “FCC INFORMATION TO USER STATEMENTS”...................................................................21

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

Page 3
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

1. EXHIBIT 1 - SUMMARY OF TEST RESULTS & GENERAL STATEMENT OF
CERTIFICATION

FCC TEST REQUIREMENTS COMPLIANCE
PARAGRAPH. (YES/NO)
15.249(a), 15.209, Transmitter Radiated Emissions, Harmonic Emissions Yes
15.205

1.1310 RF Exposure Limit Not required, no
changes in RF out
signals

15.107(a) AC Power Conducted Emissions Not applicable for
battery supplied
equipment

TESTIMONIAL AND STATEMENT OF CERTIFICATION

THIS IS TO CERTIFY:

1) THAT the application was prepared either by, or under the direct supervision of the
undersigned.

2) THAT the measurement data supplied with the application was taken under my direction and
supervision.

3) THAT the data was obtained on representative production units, representative.

4) THAT, to the best of my knowledge and belief, the facts set forth in the application and
accompanying technical data are true and correct.

Certified by:

___________________________
Tri Minh Luu, P. Eng.
V.P., Engineering

DATE: June 15, 1999

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 5
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

2.4. Related Submittal(s)/Grant

This application is for FCC Class II Permissive Change authorization with the following modifications applied
to the EUT:

1) The on-board shielded VCO was replaced with a custom VCO having identical RF and electrical
characteristics. The smaller replacement VCO was rotated, as was the PLL to match-up the inputs and
outputs. The new VCO part number is Murata MWE920-2450-T7.

2) The PLL was changed from National Semiconductor part number LMX2325 to LMX2326. The loop filter
characteristics are the same. There were no other circuit board changes.

The above changes were made due to parts availability problems.

2.5. Test Methodology

These tests were conducted on a sample of the equipment for the purpose of certification compliance with Code
of Federal Regulations (CFR47-1991), Part 15, Subpart C, Para. 15.249, Low Power Transmitters operating in
the Frequency Band 2413-2468 MHz.

Radiated emissions measurements were conducted in accordance with American National Standards Institute
ANSI C63.4-1992 - American National Standard for Methods of Measurement of Radio-Noise Emissions from
Low-Voltage Electrical and Electronic Equipment in the Range of 9 KHz to 40 GHz.

2.6. Test Facility

Radiated Emissions were performed at the UltraTech’s 3-to-10 Meter Open Field Test Site (OFTS) situated in
the Town of Oakville, province of Ontario.

The above site have been calibrated in accordance with ANSI C63.4-1992, and found to be in compliance with
the requirements of Sec. 2.948 of the FCC Rules. The descriptions and site measurement data of the Oakville
Open Field Test Site has been filed with FCC office (FCC File No.: 31040/SIT 1300B3). Last Date of Site
Calibration: September 20, 1998

The above test site is also filed with Interference Technology International Ltd (ITI - An EC Directive on
EMC).

2.7. Units of Measurements

Measurements of radiated emissions are reported in units of dB referenced to one microvolt per meter
[dB(uV)/m] at the distance specified in the report, wherever it is applicable.

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 6
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

3. EXHIBIT 3 - SYSTEM TEST CONFIGURATION

3.1. Test System Details

The following peripherals, FCC identifiers and types interconnecting cables were used with the EUT for
testing:

EUT: HUNTER ENGINEERING COMPANY, 2.4 GHz HFSS Transceiver for Automotive Wheel Alignment
System, Model: 20-24HFSS-1-0, S/N: Pre-production.
I/O Cable: All I/O cables were non-shielded
Power Supply Cable: Non-shielded

3.2. Block Diagrams for Radiated Emission Measurements

HUNTER DSP 250
with
Aerocomm 2.4 GHz
FM Radio

Unshielded I/O & 12Vdc charging supply

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 8
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

3.4. Justification

No deviation, in both configuration and operation manners, different from normal operation were required.

3.5. EUT Operating Condition

Software provided by HUNTER ENGINEERING COMPANY to set the EUT to transmit or receive at various
channel frequencies.

3.6. Special Accessories

No special accessories were required.

3.7. Equipment Modifications

Not applicable.

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 9
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

4. EXHIBIT 4 - TEST DATA

4.1. Transmitter Fundamental & Harmonic Radiated Emissions @ FCC CFR 47, Para 15.249(a)

PRODUCT NAME: 2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System,
Model No.: 20-24HFSS-1-0

FCC REQUIREMENTS:

The field strength of emissions from intentional radiators operated within these frequency bands shall comply with the
following:

Field Strength of Field Strength of
FUNDAMENTAL FREQUENCY Fundamental @ 3m Harmonics @ 3m
(dBuV/m) (dBuV/m)
2413-2468 MHz 94.0 54.0
2400 - 2483.5 MHz 94.0 54.0
5725 - 5875 MHz 94.0 54.0
24.0 - 24.25 GHz 108.0 68.0

Remarks:

• Applies to harmonics/spurious emissions that fall in the restricted bands listed in Section 15.205. The
maximum permitted average field strength is listed in Section 15.209.
• @ FCC CFR 47, Para. 15.237(c) - The emission limits as specified above are based on measurement
instrument employing an average detector. The provisions in @15.35 for limiting peak emissions apply.

FCC CFR 47, Part 15, Subpart C, Para. 15.205(a) - Restricted Frequency Bands
MHz MHz MHz GHz
0.090 - 0.110 162.0125 - 167.17 2310 - 2390 9.3 - 9.5
0.49 - 0.51 167.72 - 173.2 2483.5 - 2500 10.6 - 12.7
2.1735 - 2.1905 240 - 285 2655 - 2900 13.25 - 13.4
8.362 - 8.366 322 - 335.4 3260 - 3267 14.47 - 14.5
13.36 - 13.41 399.9 - 410 3332 - 3339 14.35 - 16.2
25.5 - 25.67 608 - 614 3345.8 - 3358 17.7 - 21.4
37.5 - 38.25 960 - 1240 3600 - 4400 22.01 - 23.12
73 - 75.4 1300 - 1427 4500 - 5250 23.6 - 24.0
108 - 121.94 1435 - 1626.5 5350 - 5460 31.2 - 31.8
123 - 138 1660 - 1710 7250 - 7750 36.43 - 36.5
149.9 - 150.05 1718.8 - 1722.2 8025 - 8500 Above 38.6
156.7 - 156.9 2200 - 2300 9000 - 9200

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 10
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

FCC CFR 47, Part 15, Subpart C, Para. 15.209(a)
-- Field Strength Limits within Restricted Frequency Bands --
FREQUENCY FIELD STRENGTH LIMITS DISTANCE
(MHz) (microvolts/m) (Meters)
0.009 - 0.490 2,400 / F (KHz) 300
0.490 - 1.705 24,000 / F (KHz) 30
1.705 - 30.0 30 30
30 - 88 100 3
88 - 216 150 3
216 - 960 200 3
Above 960 500 3

CLIMATE CONDITION:

Standard Temperature and Humidity:

• Ambient temperature: 23 oC
• Relative humidity: 51%

POWER INPUT:

12 Vdc battery.

TEST EQUIPMENT:

• Spectrum Analyzer, Advantest, Model R3271, S/N: 15050203, 100 Hz to 32 GHz)
• Spectrum Analyzer, Advantest, Model 3261A, SN 91720151, Input +25dBm max., 9KHz-2.6GHz, 50
Ohms, built-in Quasi-Peak Detector.
• RF Preselector, Advantest Model R3551, SN 92970002, 9KHz-1GHz, 50 Ohms input/output, input +25
dBm max, 30 dB gain.
• Microwave Amplifier, HP, Model 83017, Frequency Range 0.5 to 26.5 GHz, 30dB gain nominal.
• Active Loop Antenna, Emco, Model 6507, SN 8906-1167, Frequency Range 1 KHz - 30 MHz, @ 50
Ohms
• Log Periodic/Bow-Tie Antenna, Emco, Model 3143, SN 1029, 20 - 1000 MHz, @ 50 ohms.
• Log Periodic Antenna, A.H. Systems, Model SAS-200/518, SN 343, Frequency Range: 1 - 18 GHz, @ 50
Ohms.
• Horn Antenna, Emco, Model 3160-09, 18-26.5GHz

METHOD OF MEASUREMENTS:

Refer to ANSI 63.4-1992, Para. 8 for detailed radiated emissions measurement procedures.

Applies to harmonics/spurious that fall in the restricted bands listed in Section 15.205. the maximum
permitted average field strength is listed in Section 15.209. A Pre-Amp and highpass filter are used for this
measurement.

For measurement below 1 GHz, set RBW = 100 KHz, VBW > 100 KHz, SWEEP=AUTO.

For measurement above 1 GHz, set RBW = 1 MHz, VBW = 1 MHz (Peak) & VBW = 10 Hz (Average),
SWEEP=AUTO.

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 11
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

If the emission is pulsed, modified the unit for continuous operation, then use the settings above for
measurements, then correct the reading by subtracting the peak-average correction factor derived from the
appropriate duty cycle calculation. See Section 15.35(b) and (c).

FCC CFR 47, Para. 2.997 - Frequency spectrum to be investigated

The spectrum was investigated from the lowest radio generated in the equipment up to at least the 10th
harmonic of the carrier frequency or to the highest frequency practicable in the present state of the art of
measuring techniques, whichever is lower. Particular attention should be paid to harmonics and subharmonics
of the carrier frequency. Radiation at the frequencies of multiplier stages should be checked. The amplitude of
spurious emissions which are attenuated more than 20 dB below the permissible value need not be reported.

FCC CFR 47, Para. 2.993 - Field Strength Spurious Emissions

(a) Measurements was made to detect spurious emissions radiated directly from the cabinet,
control circuits, power leads, or intermediate circuit elements under normal conditions of installation
and operation. Curves or equivalent data were supplied showing the magnitude of each harmonic and
other spurious emission. For this test, single sideband, independent sideband, and controlled carrier
transmitters shall be modulated under the conditions specified in paragraph 2.989(c) as appropriate.
For equipment operating on frequencies below 1 GHz, an Open Field Test is normally required, with
the measuring instrument antenna located in the far field at all test frequencies. In event it is either
impractical or impossible to make open field measurements (e.g. a broadcast transmitter installed in a
building) measurement will be accepted of the equipment as installed. Such measurements must be
accompanied by a description of the site where the measurements were made showing the location of
any possible source of reflections which might distort the field strength measurements. Information
submitted shall include the relative radiated power of each spurious emission with the reference to the
rated power output of the transmitter, assuming all emissions are radiated from half-wave dipole
antennas.

(b) Measurements specified in paragraph (a) of this section shall be made for the following equipment:

(1) Those in which the spurious emission are required to be 60 dB or more below the mean
power of the transmitter.
(2) All equipment operating on frequencies higher than 25 MHz
(3) All equipment where the antenna is an integral part of, and attached directly to the
transmitter.
(4) Other types of equipment as required, when deemed necessary by the Commission.

TEST RESULTS: Conforms.

TEST PERSONNEL: Mr. Hung Trinh, RFI/EMI Technician

DATE: June 10, 1999

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 13
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

Transmitter Radiated Emissions Measurements at 3 Meter OFTS
Hunter Engineering Company
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System
Model 20-24HFSS-1-0
TRANSMIT Freq.: 2422.6 MHz

130.00

120.00

110.00
Radiated Emissions @ 3m (dBuV/m)

100.00

90.00

80.00 FCC 15.209 (a) Limit /
Restricted BAND
70.00
FCC 15.249 (a) Limit / Non
60.00
Restricted Band

50.00

40.00

30.00

20.00

10.00

0.00
0.010 0.100 1.000 10.000 100.000 1000.000 10000.000
Frequency (MHz)

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 19
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

5. EXHIBIT 5 - GENERAL TEST PROCEDURES

5.1. Electrical Field Radiated Emissions Measurements - General Test Method
• The radiated emission measurements were performed at the UltraTech’s 3 Meter Open Field Test Site (OFTS)
situated in the Town of Oakville, province of Ontario. The Attenuation Characteristics of OFTS have been filed to
FCC.

• Radiated emissions measurements were made using the following test instruments:

1) Calibrated EMCO active loop antenna in the frequency range from 10 KHz to 1 MHz
2) Calibrated EMCO biconilog antenna in the frequency range from 30 MHz to 2000 MHz.
3) Calibrated A.H. Systems log periodic antenna in the frequency range above 1000 MHz (1GHz - 18 GHz).
4) Horn Antennas:
a) Horn Antenna, Emco, Model 3160-09, 18-26.5GHz
b) Horn Antenna, Emco, Model 3160-10, 26.5-40GHz
c) Mixer, Tektronix, P/N 118-0098-00, 18-26.5GHz
d) Mixer, Tektronix, P/N 119-0098-00, 26.5-40GHz
e) Mixer, HP, P/N R3434A, 12.4-18GHz
f) Mixer, HP, P/N R3434B, 18-26.5GHz
g) Mixer, HP, P/N R3434C, 26.5-40GHz
5) Calibrated Advantest spectrum analyzer and pre-selector/pre-amplifier. In general, the spectrum analyzer
would be used as follows:

− The rf electric field levels were measured with the spectrum analyzer set to PEAK detector (1 KHz
RBW and 1 KHz VBW for frequency below 30 MHz, 100 KHz RBW and VBW > RBW for
Frequency below 1 GHz and 1 MHz RBW and 1 MHz VBW for frequency greater than 1 GHz).

− If any rf emission was observed to be a broadband noise, the spectrum analyzer's CISPR QUASI-
PEAK detector (120 KHz RBW and 1MHz VBW) was then set to measure the signal level.

− If the signal being measured was narrowband and the ambient field was broadband, the bandwidth of
the spectrum analyzer was reduced.

• The EUT was set-up in its typical configuration and operated in its various modes as described in 3.2 of the test
report.
• The frequencies of emissions was first detected. Then the amplitude of the emissions was measured at the specified
measurement distance using required antenna height, polarization, and detector characteristics.
• During this process, cables and peripheral devices were manipulated within the range of likely configuration.
• For each mode of operation required to be tested, the frequency spectrum was monitored. Variations in antenna
heights (from 1 meter to 4 meters above the ground plane), antenna polarization (horizontal plane and vertical
plane), cable placement and peripheral placement (each variable within bounds specified elsewhere) were explored
to produce the highest amplitude signal relative to the limit.

The maximum radiated emission for a given mode of operation was found by using the following step-by-step
procedure:

Step1: Monitor the frequency range of interest at a fixed antenna height and EUT azimuth.

Step2: Manipulate the system cables to produce highest amplitude signal relative to the limit. Note the amplitude
and frequency of the suspect signal.

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 20
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

Step3: Rotate the EUT 360 degrees to maximize the suspected highest amplitude signal. If the signal or another
at a different frequency is observed to exceed the previously noted highest amplitude signal by 1 dB or
more, go back to the azimuth and repeat Step 2. Otherwise, orient the EUT azimuth to repeat the highest
amplitude observation and proceed.

Step4: Move the antenna over its full allowed range of travel (1 to 4 meters) to maximize the suspected highest
amplitude signal. If the signal or another at a different frequency is observed to exceed the previously
noted highest amplitude signal by 1 dB or more, return to Step 2 with the highest amplitude observation
and proceed.

Step5: Change the polarization of the antenna and repeat Step 2 through 4. Compare the resulting suspected
highest amplitude signal with that found for the other polarization. Select and note the higher of the two
signals. This signal is termed the highest observed signal with respect to the limit for this EUT operational
mode.

Step6: The effects of various modes of operation is examined. This is done by varying the equipment modes as
steps 2 through 5 are being performed.

Step7: After completing steps 1 through 6, record the final highest emission level, frequency, antenna
polarization and detector mode of the measuring instrument.

Calculation of Field Strength:

The field strength is calculated by adding the calibrated antenna factor and cable factor, and subtracting the Amplifier
gain (if any) from the measured reading. The basic equation with a sample calculation is as follows:

FS = RA + AF + CF - AG

Where FS = Field Strength
RA = Receiver/Analyzer Reading
AF = Antenna Factor
CF = Cable Attenuation Factor
AG = Amplifier Gain

Example: If a receiver reading of 60.0 dBuV is obtained, the antenna factor of 7.0 dB/m and cable factor of 1.0 dB
are added, and the amplifier gain of 30 dB is subtracted. The actual field strength will be:.

Field Level in dBuV/m = 60 + 7.0 + 1.0 - 30 = 38.0 dBuV/m.

Field Level in uV/m = 10(38/20) = 79.43 uV/m.

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC PART 15, SUBPART C, SEC. 15.249 – LOW POWER TRANSMITTERS Page 21
2.4 GHz HFSS Transceiver for Automotive Wheel Alignment System, Model 20-24HFSS-1-0 FCC ID: LS3-20-24HFSS-1-0

6. EXHIBIT 6 - INFORMATION RELATED TO EQUIPMENT UNDER TESTS

6.1. FCC ID Labeling and Sketch of FCC Label Location
Refer to the original application

6.2. Photographs of Equipment under Test
Refer to the original application

6.3. System Block Diagram(s)
Refer to the original application

6.4. Schematic Diagrams
Refer to the original application

6.5. User’s Manual with “FCC Information to User Statements”
Refer to the original application

ULTRATECH GROUP OF LABS File #: AER-018FTX
3000 Brsitol Circle, Oakville, Ontario, Canada L6H 6G4 June 15, 1999
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com

• Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
• Recognized/Listed by FCC (USA), Industry Canada (Canada)
• All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

Document Created: 1999-06-23 15:45:02
Document Modified: 1999-06-23 15:45:02

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