Test Report

FCC ID: UP5AT8100

Test Report

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FCCID_749515

FCC Part 15
EMI TEST REPORT
of
E.U.T. : Tire Pressure Monitoring System
FCC ID : UP5AT8100
MODEL : AT8100
Working Frequency : 433.920 MHz

for
APPLICANT : ATBS Technology Co.
ADDRESS : 3F, No. 49, Lane 35, Jihu Rd., Neihu Chiu,
Taipei, 114, Taiwan

Test Performed by

ELECTRONICS TESTING CENTER, TAIWAN
NO. 34, LIN 5, DING FU TSUN, LINKOU HSIANG
TAIPEI HSIEN, TAIWAN, R.O.C.
Tel : (02)26023052 Fax : (02)26010910
http://www.etc.org.tw ; e-mail: r00@etc.org.tw

Report Number : 06-10-RBF-047-02

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 FCC ID.: UP5AT8100

Table of Contents Page
1. GENERAL INFORMATION ............................................................................................................................... 1
1.1 PRODUCT DESCRIPTION .......................................................................................................................................... 1
1.2 CHARACTERISTICS OF DEVICE: ............................................................................................................................... 1
1.3 TEST METHODOLOGY ............................................................................................................................................. 1
1.4 TEST FACILITY ........................................................................................................................................................ 1
2. DEFINITION AND LIMITS ................................................................................................................................ 2
2.1 DEFINITION ............................................................................................................................................................. 2
2.2 RESTRICTED BANDS OF OPERATION ....................................................................................................................... 2
2.3 LIMITATION ............................................................................................................................................................ 2
2.4 LABELING REQUIREMENT ....................................................................................................................................... 4
2.5 USER INFORMATION ............................................................................................................................................... 4
3 SYSTEM TEST CONFIGURATION ................................................................................................................... 5
3.1 JUSTIFICATION ........................................................................................................................................................ 5
3.2 DEVICES FOR TESTED SYSTEM ................................................................................................................................ 5
4. RADIATED EMISSION MEASUREMENT ...................................................................................................... 6
4.1 APPLICABLE STANDARD ......................................................................................................................................... 6
4.2 MEASUREMENT PROCEDURE................................................................................................................................... 6
4.3 TEST DATA ............................................................................................................................................................. 8
4.4 FIELD STRENGTH CALCULATION .......................................................................................................................... 10
4.5 ACTIVATE TIME .................................................................................................................................................... 10
4.6 CALCULATION OF DUTY FACTOR.......................................................................................................................... 10
4.7 RADIATED TEST EQUIPMENT ................................................................................................................................ 12
4.8 MEASURING INSTRUMENT SETUP ......................................................................................................................... 12
4.9 RADIATED MEASUREMENT PHOTOS...................................................................................................................... 13
5. BANDWIDTH OF EMISSION........................................................................................................................... 14
5.1 APPLICABLE STANDARD PLOT GRAPHIC OF BANDWIDTH ..................................................................................... 14
5.2 BANDWIDTH TEST EQUIPMENT ............................................................................................................................. 14
5.3 PLOT GRAPHIC OF BANDWIDTH ............................................................................................................................ 14
6. CONDUCTED EMISSION MEASUREMENT ................................................................................................ 16
6.1 DESCRIPTION ........................................................................................................................................................ 16
7 ANTENNA REQUIREMENT ............................................................................................................................. 17
7.1 STANDARD APPLICABLE ....................................................................................................................................... 17
7.2 ANTENNA CONSTRUCTION .................................................................................................................................... 17

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 1 of 17 Sheets
FCC ID.: UP5AT8100

1. GENERAL INFORMATION

1.1 Product Description
a) Type of EUT : Tire Pressure Monitoring System
b) Trade Name : ATBS
c) Model No. : AT8100
d) FCC ID : UP5AT8100
e) Working Frequency : 433.920 MHz
f) Power Supply : DC 3 V Battery

1.2 Characteristics of Device:
Operating Temp. Range : -40 C to 120 C
Pressure monitoring range: 0~108 psi for truck
Pressure readin g accuracy: +/- 1.5 psi at normal pressure range
Temperature readin g accuracy: +/- 2 C
Batter y voltage: 3 V
Batter y life: More than 5 years
Frequency: 433.92MHz

1.3 Test Methodology
Both conducted and radiated testing was performed according to the procedures in
chapter 13 of ANSI C63.4.
The Transmitter under test was operated continuously in its normal operating mode for
the purpose of the measurements. In order to secure the continuous operation of the
device under test, rewiring in the circuit was done by the manufacturer so as to affect its
intended operation.
The receiving antenna polarized horizontally was varied from 1 to 4 meters and the
wooden turntable was rotated through 360 degrees to obtain the highest reading on the
field strength meter or on the display of the spectrum analyzer. And also, each emission
was to be maximized by changing the orientation of the Transmitter under test.
In order to determining the average value during one pulse train of the radiated power
generated from the Transmitter under test, the encoded wave form in the time domain
was used.

1.4 Test Facility
The open area test site and conducted measurement facility used to collect the radiated
data is located on the roof top of Building at No.34, Lin 5, Ding Fu Tsun, Linkou
Hsiang, Taipei Hsien, Taiwan, R.O.C.
This site has been fully described in a report submitted to your office, and accepted in a
letter dated Oct. 20, 2005.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 2 of 17 Sheets
FCC ID.: UP5AT8100

2. DEFINITION AND LIMITS
2.1 Definition
Intentional radiator:
A device that intentionally generates and emits radio frequency energy by radiation or
induction.

2.2 Restricted Bands of Operation

Only spurious emissions are permitted in any of the frequency bands listed below:
MHz MHz MHz GHz
0.090 - 0.110 16.42-16.423 399.9-410 4.5-5.15
0.495 - 0.505 ** 16.69475 - 16.69525 608-614 5.35-5.46
2.1735 - 2.1905 16.80425 - 16.80475 960-1240 7.25-7.75
4.125-4.128 25.5-25.67 1300-1427 8.025-8.5
4.17725-4.17775 37.5-38.25 1435-1626.5 9.0-9.2
4.20725-4.20775 73-74.6 1645.5-1646.5 9.3-9.5
6.215-6.218 74.8-75.2 1660-1710 10.6-12.7
6.26775-6.26825 108-121.94 1718.8-1722.2 13.25-13.4
6.31175-6.31225 123-138 2200-2300 14.47-14.5
8.291-8.294 149.9-150.05 2310-2390 15.35-16.2
8.362-8.366 156.52475 - 156.52525 2483.5-2500 17.7-21.4
8.37625-8.38675 156.7-156.9 2655-2900 22.01-23.12
8.41425-8.41475 162.0125-167.17 3260-3267 23.6-24.0
12.29-12.293 167.72-173.2 3332-3339 31.2-31.8
12.51975-12.52025 240-285 3345.8-3358 36.43-36.5
12.57675-12.57725 322-335.4 3360-4400 Above 38.6
13.36-13.41
Remark “**” : Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz

2.3 Limitation
(1) Conducted Emission Limits:
Except as shown in paragraphs (b) and (c) of this section, for an intentional radiator
that is designed to be connected to the public utility (AC) power line, the radio
frequency voltage that is conducted back onto the AC power line on any frequency
or frequencies within the band 150kHz to 30 MHz shall not exceed the limits in the
following table, as measured using a 50µH/50 ohms line impedance stabilization
network (LISN). Compliance with the provisions of this paragraph shall be based on
the measurement of the radio frequency voltage between each power line and ground
at the power terminal. The lower limit applies at the boundary between the frequency
ranges.
Frequency Quasi Peak Average
MHz dBμV dBμV
0.15 - 0.5 66-56* 56-46*
0.5 - 5.0 56 46
5.0 - 30.0 60 50
Decreases with the logarithm of the frequency

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 3 of 17 Sheets
FCC ID.: UP5AT8100

(2) Radiated Emission Limits :

According to 15.231(a), Periodic operation in the band 40.66-40.70 MHz and above
70 MHz, except as shown in paragraph 15.231(e), the field strength of emissions
from intentional radiators operated under this section shall not exceed the following:

Frequency Band Field strength of Field strength of
(MHz) Fundamental (uV/m) Spurious (uV/m)
40.66-40.70 2250 225
70-130 1250 125
130-174 *1,250 to 3,750 *125 to 375
174-260 3750 375
260-470 *3,750 to 12,500 *375 to 1250
Above 470 12500 1250
* Linear interpolations.

According to 15.231(e), Intentional radiators may operate at a periodic rate
exceeding that specified in paragraph (a) and may be employed for any type of
operation, including operation prohibited in paragraph (a), provided the intentional
radiator complies with the provisions of paragraphs (b) through (d) of this Section,
except the field strength table in paragraph (b) is replaced by the following:
Frequency Band Field strength of Field strength of
(MHz) Fundamental (uV/m) Spurious (uV/m)
40.66-40.70 1,000 100
70-130 500 50
130-174 *500 to 1,500 *50 to 150
174-260 1,500 150
260-470 *1,500 to 5,000 *150 to 500
Above 470 5,000 500
* Linear interpolations

Field strength limits are at the distance of 3 meters, emissions radiated outside of the
specified bands, shall be according to the general radiated limits in 15.209,as
following table:

Other Frequencies Field Strength of Fundamental
(MHz) µV/meter dBµV/meter
30 - 88 100 40.0
88 - 216 150 43.5
216 - 960 200 46.0
Above 960 500 54.0

As shown in 15.35(b), for frequencies above 1000MHz, the field strength limits are
based on average detector, however, 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.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 4 of 17 Sheets
FCC ID.: UP5AT8100

(3) Limit of transmission time
According to 15.231(a),
1) A manually operated transmitter shall employ a switch that will automatically
deactivate the transmitter within not more than 5 seconds of being released.
2) A transmitter activated automatically shall cease transmission within 5 seconds
after activation.
3) Periodic transmissions at regular predetermined intervals are not permitted.
However, polling or supervision transmissions, including data, to determine
system integrity of transmitters used in security or safety applications are
allowed if the total duration of transmissions does not exceed more than two
seconds per hour for each transmitter. There is no limit on the number of
individual transmissions, provided the total transmission time does not exceed
two seconds per hour.
4) Intentional radiators which are employed for radio control purposes during
emergencies involving fire, security, and safety of life, when activated to signal
an alarm, may operate during the pendency of the alarm condition.
5) Transmission of set-up information for security systems may exceed the
transmission duration limits in paragraphs (a)(1) and (a)(2) of this section,
provided such transmission are under the control of a professional installer and
do not exceed ten seconds after a manually operated switch isreleased or a
transmitter is activated automatically. Such set-up information may include data.
According to 15.231(e), devices operated under the provisions of this paragraph shall
be provided with a means for automatically limiting operation so that the duration of
each transmission shall not be greater than one second and the silent period between
transmissions shall be at least 30 times the duration of the transmission but in no case
less than 10 seconds.

2.4 Labeling Requirement
The device shall bear the following statement in a conspicuous location on the device :

This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.

2.5 User Information
The users manual or instruction manual for an intentional or unintentional radiator shall
caution the user that changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 5 of 17 Sheets
FCC ID.: UP5AT8100

3 SYSTEM TEST CONFIGURATION
3.1 Justification

All measurement were intentional to maximum the emissions from EUT by varying the
connection cables, therefore, the test result is sure to meet the applicable requirement.

3.2 Devices for Tested System

Device Manufacture Model / FCC ID. Description
Tire Pressure ATBS Technology Co. AT8100 ----
Monitoring UP5AT8100
System*

Remark “*” means equipment under test.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 8 of 17 Sheets
FCC ID.: UP5AT8100

4.3 Test Data
A. Fundanmental and Harmonic
Operation Mode : Transmitting
Test Date : Dec. 05, 2006 Temperature : 22 ℃ Humidity: 65 %

Frequency Ant Reading Factor Result @3m Limit @3m Margin Table Ant.
Pol (dBuV) (dB) (dBuV/m) (dBuV/m) Degree High
(MHz) H/V Peak C D Peak Ave. Peak Ave. (dB) (Deg.) (m)
433.922 H 82.2 -5.5 -16.7 76.7 60.0 100.1 80.1 -20.1 88 1.5
867.844 H 58.5 2.3 -16.7 60.8 44.1 80.1 60.1 -16.0 92 1.6
*1301.766 H/V --- -8.4 -16.7 --- --- 74.0 54.0 --- --- ---
1735.688 H/V --- -6.1 -16.7 --- --- 80.1 60.1 --- --- ---
2169.610 H/V --- -4.0 -16.7 --- --- 80.1 60.1 --- --- ---
2603.532 H/V --- -2.4 -16.7 --- --- 80.1 60.1 --- --- ---
3037.454 H/V --- -1.1 -16.7 --- --- 80.1 60.1 --- --- ---
*3471.376 H/V --- -0.1 -16.7 --- --- 74.0 54.0 --- --- ---
*3905.298 H/V --- 1.6 -16.7 --- --- 74.0 54.0 --- --- ---
*4339.220 H/V --- 2.0 -16.7 --- --- 74.0 54.0 --- --- ---
Note :
1. Factor C means “corrected”, and that includes antenna factor, cable loss, amplifier
gain (if any). And Factor D means “Duty”, that is for calculating the average value
and derived from section 3.6 in this test report.
2. Peak Result = Reading + C. Factor
Ave. Result = Peak Value + D Factor
3. “*” means the frequency fall in the restricted frequency band, and the limit of
emission is referred to FCC class B
4. The limit for spurious emissions refers to FCC§15.231.
5. The expanded uncertainty of the radiated emission tests is 3.53 dB.

If the measured frequencies fall in the restricted frequency band, the limit employed is §
15.209 general requirement when frequencies are below or equal to 1 GHz. And the
measuring instrument is set to quasi peak detector function, no duty factor applied.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 9 of 17 Sheets
FCC ID.: UP5AT8100

B. Other Emission

a) Emission frequencies below 1 GHz

Test Date : Dec. 05, 2006 Temperature : 22 ℃ Humidity : 65 %
Frequency Ant-Pol Meter Corrected Result Limit Margin Table Ant.
Reading Factor @3m @3m (dB) Degree High
(MHz) H/V (dBuV) (dB) (dBuV/m) (dBuV/m) (Deg.) (m)
38.89 V 40.3 -11.6 28.7 40.0 -11.3 188 1.0
155.14 V 39.6 -9.7 29.9 43.5 -13.6 192 1.0
298.17 V 32.0 -1.0 31.0 46.0 -15.0 175 1.2
475.18 V 38.3 -4.5 33.8 46.0 -12.2 194 1.2
588.62 V 40.5 -4.9 35.6 46.0 -10.4 188 1.1
752.19 V 38.0 -0.3 37.7 46.0 -8.3 182 1.1
Note :
1. Remark “---” means that the emission level is too low to be measured.
2. The expanded uncertainty of the radiated emission tests is 3.53 dB.

b) Emission frequencies above 1 GHz
Radiated emission frequencies above 1 GHz to 5 GHz were too low to be
measured with a pre-amplifier of 35 dB.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 10 of 17 Sheets
FCC ID.: UP5AT8100

4.4 Field Strength Calculation

The field strength is calculated by adding the Antenna Factor and Cable Factor, and
subtracting the Amplifier Gain (if any) from the measured reading. For the limit is
employed average value, therefore the peak value can be transferred to average value by
subtracting the duty factor. The basic equation with a sample calculation is as follows:
Peak = Reading + Corrected Factor
where
Corr. Factor = Antenna Factor + Cable Factor - Amplifier Gain (if any)
And the average value is
Average = Peak Value + Duty Factor
Note : If the measured frequencies are fall in the restricted frequency band, the limit
employed must be quasi peak value when frequencies are below or equal to 1
GHz. And the measuring instrument is set to quasi peak detector function.

4.5 Activate Time

According to 15.231(a)(2), a transmitter activated automatically shall ceases
transmission within 5 seconds after activation. The EUT activated automatically and the
transmitting time is 14.6ms that comply with 15.231(a)(2).
According to 15.231(a)(3), polling or supervision transmissions, including data, to
determine system integrity of transmitters used in security or safety applications are
allowed if the total duration of transmissions does not exceed more than two seconds
per hour for each transmitter. There is no limit on the number of individual
transmissions, provided the total transmission time does not exceed two seconds per
hour. The EUT transmits a pulse of 14.6ms in every 45 seconds and the total duration
time is 1.17 second per hour that comply with 15.231(a)(3).
According to 15.231(a)(4), intentional radiators which are employed for radio control
purposes during emergencies involving fire, security, and safety of life, when activated
to signal an alarm, may operate during the pendency of the alarm condition. The EUT
transmits 14.6ms in every second and the transmission is lasting for one minute during
the emergency of abnormal of tire pressure that complies with 15.231(a)(3).

4.6 Calculation of Duty Factor

The duty factor is calculated with following formula :

Total Duty
20 log
Period of Pulse Train

433.92 MHz
14.6ms
Duty Factor＝ 20log = -16.7dB
100ms

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 11 of 17 Sheets
FCC ID.: UP5AT8100

RBW 10 kHz Delta 1 [T1 ]
* VBW 1 MHz 0.37 dB
Ref 90 dBµV * Att 10 dB SWT 200 ms 14.600000 ms
90 Marker 1 [T1 ]
11.45 dBµV
73.800000 ms A
80

1 PK
VIEW
70

60

50

40

30

20

1 1
10

0

-10

Center 433.9912 MHz 20 ms/

Date: 5.DEC.2006 12:57:53

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 15 of 17 Sheets
FCC ID.: UP5AT8100

* RBW 10 kHz Marker 1 [T1 ]
* VBW 1 MHz 60.63 dBµV
Ref 80 dBµV * Att 10 dB SWT 5 ms 434.000000000 MHz
80 ndB [T1] 20.00 dB
BW 27.000000000 kHz
Temp 1 [T1 ndB] A
70
39.74 dBµV
1 PK 1 433.985000000 MHz
VIEW
60 Temp 2 [T1 ndB]
41.60 dBµV
434.012000000 MHz
50

T2
T1
40

30

20

10

0

-10

-20

Center 434 MHz 50 kHz/ Span 500 kHz

Date: 5.DEC.2006 12:08:16

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 16 of 17 Sheets
FCC ID.: UP5AT8100

6. CONDUCTED EMISSION MEASUREMENT

6.1 Description
This EUT is excused from investigation of conducted emission, for it is powered by DC
3V battery only. According to §15.207 (d), measurements to demonstrate compliance
with the conducted limits are not required for devices which only employ battery power
for operation and which do not operate from the AC power lines or contain provisions for
operation while connected to the AC power lines.

Rev. No 1.0

ETC Report No.:06-10-RBF-047-02 Sheet 17 of 17 Sheets
FCC ID.: UP5AT8100

7 ANTENNA REQUIREMENT
7.1 Standard Applicable
According to §15.203, an intentional radiator shall be designed to ensure that no antenna
other than that furnished by the responsible party shall be used with the device.

7.2 Antenna Construction
The antenna is permanently integrated on RF Board, no consideration of replacement.
Please see photos submitted in Exhibit B.

Rev. No 1.0

Document Created: 2007-01-17 19:00:53
Document Modified: 2007-01-17 19:00:53

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