Test Report

FCC ID: MRXMBG2

Test Report

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FCCID_3221344

Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

Revision History

Rev. No. Date Details Revised By

r0 November 14, 2016 Initial Release. J. Brunett

Contents
Revision History 2

Table of Contents 2

1 Test Report Scope and Limitations 4
1.1 Laboratory Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Report Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Subcontracted Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Limitation of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Endorsements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.7 Test Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Traceability and Equipment Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Test Specifications and Procedures 6
2.1 Test Specification and General Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Configuration and Identification of the Equipment Under Test 7
3.1 Description and Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.1 EUT Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.3 Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.4 Test Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.5 Functional Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.6 Modifications Made . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.7 Production Intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.8 Declared Exemptions and Additional Product Notes . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Emissions 9
4.1 General Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1.1 Radiated Test Setup and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1.2 Conducted Emissions Test Setup and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.3 Power Supply Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.4 Thermal Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Intentional Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Fundamental Emission Pulsed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.2 Fundamental Emission Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.3 Fundamental Emission Field Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.4 Exposure and Potential Health Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Unintentional Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.1 Transmit Chain Spurious Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2 Radiated Digital Spurious . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 Measurement Uncertainty 20

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

List of Tables
1 Test Site List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Equipment List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 EUT Declarations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Fundamental Emission Pulsed Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Fundamental Emission Bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Fundamental Emission Field Strength. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 Electromagnetic Field Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 Transmit Chain Spurious Emissions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9 Measurement Uncertainty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

List of Figures
1 Photos of EUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 EUT Test Configuration Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Radiated Emissions Diagram of the EUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Radiated Emissions Test Setup Photograph(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Fundamental Emission Pulsed Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Fundamental Emission Pulsed Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 Fundamental Emission Bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

1 Test Report Scope and Limitations
1.1 Laboratory Authorization
Test Facility description and attenuation characteristics are on file with the FCC Laboratory, Columbia, Maryland
(FCC Reg. No: 688478) and with ISED Canada, Ottawa, ON (File Ref. No: IC8719A-1).

1.2 Report Retention
For equipment verified to comply with the regulations herein, the manufacturer is obliged to retain this report with
the product records for the life of the product, and no less than ten years. A copy of this report will remain on file
with this Laboratory until November 2026.

1.3 Subcontracted Testing
This report does not contain data produced under subcontract.

1.4 Limitation of Results
The test results contained in this report relate only to the item(s) tested. Any electrical or mechanical modification
made to the test item subsequent to the test date shall invalidate the data presented in this report. Any electrical
or mechanical modification made to the test item subsequent to this test date shall require reevaluation.

1.5 Copyright
This report shall not be reproduced, except in full, without the written approval of Willow Run Test Labs, LLC.

1.6 Endorsements
This report shall not be used to claim product endorsement by any accrediting, regulatory, or governmental agency.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

3.1.2 Modes of Operation
This device is capable of three key modes of operation. Upon manually activated LF interrogation (through the
use of special LF tool at a vehicle dealership), the EUT responds with a single transmission containing a number of
frames used to configure the device with the vehicle. When the EUT is installed in the vehicle tire and the vehicle
drives, it can, in the worst case, periodically transmit where the duration of each transmission is always less than 1
second and the silent period between transmissions is at least 30 times the duration of the transmission, and never
less than 10 seconds. In the case of an emergency condition, the EUT will transmit tire pressure and temperature
information throughout the duration of the condition.

3.1.3 Variants
There is only a single variant of the EUT. Normal samples were programmed into worst case on-time, worst case
emission bandwidth, and CW mode using a supplied LF tools.

3.1.4 Test Samples
Six samples in total were provided; five samples were capable of normal operation and CW mode activation via LF
tools provided. One sample was open (un-welded) for testing and photographs.

3.1.5 Functional Exerciser
Normal operating EUT functionality was verified by observation of transmitted signal.

3.1.6 Modifications Made
There were no modifications made to the EUT by this laboratory.

3.1.7 Production Intent
The EUT appears to be a production ready sample.

3.1.8 Declared Exemptions and Additional Product Notes
The EUT is permanently installed in a transportation vehicle. As such, digital emissions are exempt from US and
Canadian digital emissions regulations (per FCC 15.103(a) and IC correspondence on ICES-003).

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4 Emissions
4.1 General Test Procedures
4.1.1 Radiated Test Setup and Procedures
Radiated electromagnetic emissions from the EUT are first pre-scanned in our shielded anechoic chamber or GTEM
test cell. Spectrum and modulation characteristics of all emissions are recorded. Instrumentation, including spectrum
analyzers and other test equipment as detailed in Section 1.7 are employed. After pre-scan, emission measurements
are made on the test site of record. If the EUT connects to auxiliary equipment and is table or floor standing, the
configurations prescribed in relevant test standards are followed. Alternatively, a layout closest to normal use (as
declared by the provider) is employed if the resulting emissions appear to be worst-case in such a configuration. See
Figure 3. All intentionally radiating elements that are not fixed-mounted in use are placed on the test table lying
flat, on their side, and on their end (3-axes) and the resulting worst case emissions are recorded. If the EUT is
fixed-mounted in use, measurements are made with the device oriented in the manner consistent with installation
and then emissions are recorded.

Long Interface Cables
EUT Power Long Interface Cables
(to AUX) AUX Power
(to EUT)

Equipment Under Test Auxiliary
(EUT)
Short Interface Cables Equipment
(AUX)

Radiated Emissions Table

Figure 3: Radiated Emissions Diagram of the EUT.

If the EUT exhibits spurious emissions due to internal receiver circuitry, such emissions are measured with an
appropriate carrier signal applied. For devices with intentional emissions below 30 MHz, a shielded loop antenna is
used. It is placed at a 1 meter receive height. Emissions between 30 MHz and 1 GHz are measured using tuned dipoles
and/or calibrated broadband antennas. For both horizontal and vertical polarizations, the test antenna is raised and
lowered from 1 to 4 m in height until a maximum emission level is detected. The EUT is then rotated through 360o
in azimuth until the highest emission is detected. The test antenna is then raised and lowered one last time from
1 to 4 m and the worst case value is recorded. Emissions above 1 GHz are characterized using standard gain horn
or broadband ridge-horn antennas on our OATS with a 4 × 5 m rectangle of H-4 absorber placed over the ground
screen covering the OATS ground screen. Care is taken to ensure that test receiver resolution and video bandwidths
meet the regulatory requirements, and that the emission bandwidth of the EUT is not reduced. Photographs of the
test setup employed are depicted in Figure 4.
Where regulations allow for direct measurement of field strength, power values (dBm) measured on the test
receiver / analyzer are converted to dBµV/m at the regulatory distance, using
Edist = 107 + PR + KA − KG + KE − CF
where PR is the power recorded on spectrum analyzer, in dBm, KA is the test antenna factor in dB/m, KG is the
combined pre-amplifier gain and cable loss in dB, KE is duty correction factor (when applicable) in dB, and CF is
a distance conversion (employed only if limits are specified at alternate distance) in dB. This field strength value is
then compared with the regulatory limit. If effective isotropic radiated power (EIRP) is computed, it is computed as
EIRP (dBm) = E3m (dBµV /m) − 95.2.
When presenting data at each frequency, the highest measured emission under all possible EUT orientations (3-axes)
is reported.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4.1.2 Conducted Emissions Test Setup and Procedures
Battery Power Conducted Spurious The EUT is not subject to measurement of power line conducted emissions
as it is powered solely by its internal battery.

4.1.3 Power Supply Variation
Tests at extreme supply voltages are made if required by the the procedures specified in the test standard, and results
of this testing are detailed in this report.
In the case the EUT is designed for operation from a battery power source, the extreme test voltages are evaluated
over the range specified in the test standard; no less than ±10% of the nominal battery voltage declared by the
manufacturer. For all battery operated equipment, worst case intentional and spurious emissions are re-checked
employing a new (fully charged) battery.

4.1.4 Thermal Variation
Tests at extreme temperatures are made if required by the procedures specified in the test standard, and results of
this testing are detailed in this report. The provider has declared that the EUT is designed for operation over the
temperature range −40o C to +120o C. Before any temperature measurements are made, the equipment is allowed to
reach a thermal balance in the test chamber, temperature and humidity are recorded, and thermal balance is verified
via a thermocouple–based probe.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4.2 Intentional Emissions
4.2.1 Fundamental Emission Pulsed Operation
Test Setup & Procedure The test equipment and facilities were setup in accordance with the standards and
procedures listed in Section 2.1. Environmental conditions were set at the appropriate temperature and thermal
balance was checked with a thermocouple based probe. Duty cycle is reported for all relevant modes of operation.
The test equipment employed includes RSFSV30001, DIPEMC001.

Measurement Results The details and results of testing the EUT are summarized in Table 4. Plots showing the
measurements made to obtain these values are provided in Figure 5.

Table 4: Fundamental Emission Pulsed Operation.

Test Date: 30-Oct-16
Detector Span IF Bandwidth Video Bandwidth Test Engineer: Joseph Brunett
Pk 0 1 MHz 3 MHz EUT: Schrader MBG2
EUT Mode: Modulated
Meas. Distance: 10 cm

FCC/IC
Overall Transmission Internal Frame Characteristics
Computed Duty
Min. Max. Total Cycle
Repetition No. of Transmission Max. Frame Min. Frame
# EUT Test Mode* Rate (sec) Frames Length (sec) Length (ms) Period (ms) Frame Encoding (%) (dB)
Worst-case Manually activated LEARN transmission
LEARN (Man consists of nine 9.99 ms FSK frames. One of
1 single 9 3.84 10.0 100.8 10.0 20.0
Activ.) Mode. See which may occur within any given 100 ms
Subfigure (a) window.
Worst Case periodic transmission consists of
Worst-case DRIVE
three 9.99 ms FSK frames every 19.7
2 (Periodic) Mode. 19.7 3 0.211 10.0 110.0 10.0 20.0
seconds. One frame may be transmitted
See Subfigure (b)
within any given 100 ms window.

Example Calculation: Worst Case FSK Duty (%) = ( 9.99 ms) / 100 ms ) x 100 = 10.0 %

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4.2.3 Fundamental Emission Field Strength
Test Setup & Procedure The test equipment and facilities were setup in accordance with the standards and
procedures listed in Section 2.1. Environmental conditions were set at the appropriate temperature and thermal
balance was checked with a thermocouple based probe. Fundamental emissions are measured at the regulatory
distance on our OATS. The test equipment employed includes RSFSV30001, DIPEMC001.

Measurement Results The details and results of testing the EUT are summarized in Table 6.

Table 6: Fundamental Emission Field Strength.

Frequency Range Det IF Bandwidth Video Bandwidth Test Date: 26-Oct-16
25 MHz ≤ f ≤ 1 000 MHz Pk/QPk 120 kHz 300 kHz Test Engineer: Joseph Brunett
f > 1 000 MHz Pk 1 MHz 3 MHz EUT: Schrader MBG2
f > 1 000 MHz Avg 1 MHz 10 kHz EUT Mode: CW
Meas. Distance: 3 meters

FCC/IC
Freq. Ant. Ant. Pr (Pk) Pr (Avg)* Ka Kg E3(Pk) E3(Avg) FCC/IC E3(Avg) Pass
# MHz Used Pol. dBm dBm dB/m dB dBµV/m dBµV/m Lim. dBµV/m dB Comments
1 Schrader MBG2
2 315.0 LOGP H -15.4 -35.4 14.1 32.6 73.1 53.1 67.7 14.6 end
3 315.0 LOGP V -12.2 -32.2 14.1 32.6 76.3 56.3 67.7 11.4 flat
4
5
6
Freq. DC Supply Relative Pr (Pk)
# MHz Voltage dBm**
7 315.0 2.60 -15.4
8 315.0 2.80 -12.3
9 315.0 3.00 -12.2
10 315.0 3.15 -11.6
11 315.0 3.30 -11.1
*Avg data computed from Peak Measured Data and EUT Duty Cycle. EUT in CW mode.
** EUT in CW mode.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4.3 Unintentional Emissions
4.3.1 Transmit Chain Spurious Emissions
Test Setup & Procedure The test equipment and facilities were setup in accordance with the standards and
procedures listed in Section 2.1. Environmental conditions were set at the appropriate temperature and thermal
balance was checked with a thermocouple based probe. Spurious radiated emissions measurements are performed
to 10 times the highest fundamental operating frequency. The test equipment employed includes RSFSV30001,
DIPEMC001, HRNQR316401.

Measurement Results The details and results of testing the EUT are summarized in Table 8.

Table 8: Transmit Chain Spurious Emissions.

Frequency Range Det IF Bandwidth Video Bandwidth Test Date: 26-Oct-16
25 MHz ≤ f ≤ 1 000 MHz Pk/QPk 120 kHz 300 kHz Test Engineer: Joseph Brunett
f > 1 000 MHz Pk 1 MHz 3 MHz EUT: Schrader MBG2
f > 1 000 MHz Avg 1 MHz 10kHz EUT Mode: CW
Meas. Distance: 3 meters

Transmitter Unintentional Spurious Emissions FCC/IC
Freq. Ant. Ant. Pr (Pk) Pr (Avg)* Ka Kg E3(Pk) E3(Avg) FCC/IC E3lim (Avg) Pass
# MHz Used Pol. dBm dBm dB/m dB dBµV/m dBµV/m dBµV/m dB Comments
1 Schrader MBG2
2 630.0 LOGP H -65.9 -85.9 19.5 29.3 31.3 11.3 47.7 36.4 end
3 630.0 LOGP V -68.3 -88.3 19.5 29.3 28.9 8.9 47.7 38.8 flat
4 945.0 LOGP H -81.9 -101.9 23.2 26.3 22.0 2.0 47.7 45.7 end
5 945.0 LOGP V -84.8 -104.8 23.2 26.3 19.1 -.9 47.7 48.6 flat
6 1260.0 R-Horn H/V 25.0 -0.2 21.7 1.7 54.0 52.3 max all
7 1575.0 R-Horn H/V 27.7 -0.2 14.6 -5.4 54.0 59.4 max all
8 1890.0 R-Horn H/V 29.4 -0.2 19.2 -.8 54.0 54.8 max all
9 2205.0 R-Horn H/V 30.9 -0.3 17.3 -2.7 54.0 56.6 max all
10 2520.0 R-Horn H/V 33.1 -0.3 17.6 -2.4 54.0 56.4 max all
11 2835.0 R-Horn H/V 35.6 -0.3 17.5 -2.5 54.0 56.5 max all
12 3150.0 R-Horn H/V 36.7 -0.3 19.3 -.7 54.0 54.7 max all
13
*Avg data computed from Peak Measured Data and EUT Duty Cycle. EUT in CW mode.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

4.3.2 Radiated Digital Spurious
The results for the measurement of digital spurious emissions are not reported herein as all digital emissions were
greater than 20 dB below the regulatory limit. Radiation from digital components was measured to 4 GHz, or to
five times the maximum digital component operating frequency, whichever is greater.

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Issue Date: November 14, 2016 Prepared For: Schrader Electronics Report No.: 20161114-RPTSCHR10003Ar0

5 Measurement Uncertainty
The maximum values of measurement uncertainty for the laboratory test equipment and facilities associated with
each test are given in the table below. This uncertainty is computed for a 95.45% confidence level based on a coverage
factor of k = 2.

Table 9: Measurement Uncertainty.

Measured Parameter Measurement Uncertainty†
7
Radio Frequency ±(fM kr /10 + RBW/10 + (SP N/(P T S − 1))/2 + 1 Hz)
Conducted Emm. Amplitude ±1.8 dB
Radiated Emm. Amplitude (30 − 200 MHz) ±2.7 dB
Radiated Emm. Amplitude (200 − 1000 MHz) ±2.5 dB
Radiated Emm. Amplitude (f > 1000 MHz) ±3.7 dB
DC and Low Frequency Voltages ±2%
Temperature ±0.5◦ C
Humidity ±5%
† Ref: CISPR 16-4-2:2011+A1:2014

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Document Created: 2016-11-24 07:38:52
Document Modified: 2016-11-24 07:38:52

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