Test Report

FCC ID: GQ4-38R

Test Report

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                         University of Michigan Radiation Laboratory
                   FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377



                                      The University of Michigan
                                        Radiation Laboratory
                                         3228 EECS Building
                                      Ann Arbor, MI 48109-2122
                                         Tel: (734) 764-0500


                                 Measured Radio Frequency Emissions
                                               From

                                  TRW Receiver
                                 FCC ID: GQ4-38R
                  Model/P(s): 218143-108, 218143-109, 218143-110

                                        Report No. 415031-377
                                            July 16, 2007

                                           Copyright © 2007

                                                For:
                                              TRW Inc.
                                        24175 Research Drive
                                   Farmington Hills, MI 48335-2642


                                               Contact:
                                           Danny Logsdon
                                       Danny.Logsdon@trw.com
                                          Tel: 248.426.3999
                                          Fax: 248.615.7872
                                             PO: Verbal


                                                   Tests supervised by:
Measurements made by:       Valdis V. Liepa        Report approved by: _____________________
                                                                           Valdis V. Liepa
Test Report Prepared by:    Joseph D. Brunett                              Research Scientist


Summary

Tests for compliance with FCC Regulations Part 15, Subpart B, and Industry Canada RSS-210/GEN,
were performed on TRW model/PN(s) 218143-108, 218143-109, 218143-110. This device is subject to
the Rules and Regulations as a Receiver. As a Digital Device it is exempt, but such measurements were
made to assess the receiver's overall emissions.
        In testing completed on July 13, 2007, the device tested in the worst case met the allowed Class
B specifications for radiated emissions by 9.7 dB (see p. 6). The conducted emissions tests do not apply,
since the device is powered from a 12 VDC system.

                                                Page 1 of 9


                         University of Michigan Radiation Laboratory
                   FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377

1. Introduction

TRW model/PN(s) 218143-108, 218143-109, 218143-110 was(were) tested for compliance with FCC
Regulations, Part 15, adopted under Docket 87-389, April 18, 1989 as subsequently amended, and with
Industry Canada RSS-210, Issue 7; RSS-Gen Issue 2; June, 2007. The tests were performed at the
University of Michigan Radiation Laboratory Willow Run Test Range following the procedures
described in ANSI C63.4-2003 "Methods of Measurement of Radio-Noise Emissions from Low-Voltage
Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz". The Site description and
attenuation characteristics of the Open Site facility are on file with FCC Laboratory, Columbia, Maryland
(FCC Reg. No: 91050) and with Industry Canada, Ottawa, ON (File Ref. No: IC 2057A-1).

2. Test Procedure and Equipment Used

The pertinent test equipment commonly used in our facility for measurements is listed in Table 2.1
below. The middle column identifies the specific equipment used in these tests.

                                       Table 2.1 Test Equipment.
             Test Instrument                 Eqpt. Used                   Manufacturer/Model
Spectrum Analyzer (0.1-1500 MHz)                             Hewlett-Packard, 182T/8558B
Spectrum Analyzer (9kHz-22GHz)                   X           Hewlett-Packard 8593A SN: 3107A01358
Spectrum Analyzer (9kHz-26GHz)                   X           Hewlett-Packard 8593E, SN: 3412A01131
Spectrum Analyzer (9kHz-26GHz)                               Hewlett-Packard 8563E, SN: 3310A01174
Spectrum Analyzer (9kHz-40GHz)                               Hewlett-Packard 8564E, SN: 3745A01031
Power Meter                                                  Hewlett-Packard, 432A
Power Meter                                                  Anritsu, ML4803A/MP
Harmonic Mixer (26-40 GHz)                                   Hewlett-Packard 11970A, SN: 3003A08327
Harmonic Mixer (40-60 GHz)                                   Hewlett-Packard 11970U, SN: 2332A00500
Harmonic Mixer (75-110 GHz)                                  Hewlett-Packard 11970W, SN: 2521A00179
Harmonic Mixer (140-220 GHz)                                 Pacific Millimeter Prod., GMA, SN: 26
S-Band Std. Gain Horn                                        S/A, Model SGH-2.6
C-Band Std. Gain Horn                                        University of Michigan, NRL design
XN-Band Std. Gain Horn                                       University of Michigan, NRL design
X-Band Std. Gain Horn                                        S/A, Model 12-8.2
X-band horn (8.2- 12.4 GHz)                                  Narda 640
X-band horn (8.2- 12.4 GHz)                                  Scientific Atlanta , 12-8.2, SN: 730
K-band horn (18-26.5 GHz)                                    FXR, Inc., K638KF
Ka-band horn (26.5-40 GHz)                                   FXR, Inc., U638A
U-band horn (40-60 GHz)                                      Custom Microwave, HO19
W-band horn(75-110 GHz)                                      Custom Microwave, HO10
G-band horn (140-220 GHz)                                    Custom Microwave, HO5R
Bicone Antenna (30-250 MHz)                      X           University of Michigan, RLBC-1
Bicone Antenna (200-1000 MHz)                    X           University of Michigan, RLBC-2
Dipole Antenna Set (30-1000 MHz)                 X           University of Michigan, RLDP-1,-2,-3
Dipole Antenna Set (30-1000 MHz)                             EMCO 2131C, SN: 992
Active Rod Antenna (30 Hz-50 MHz)                            EMCO 3301B, SN: 3223
Active Loop Antenna (30 Hz-50 MHz)                           EMCO 6502, SN:2855
Ridge-horn Antenna (300-5000 MHz)                X           University of Michigan
Amplifier (5-1000 MHz)                           X           Avantak, A11-1, A25-1S
Amplifier (5-4500 MHz)                           X           Avantak
Amplifier (4.5-13 GHz)                                       Avantek, AFT-12665
Amplifier (6-16 GHz)                                         Trek
Amplifier (16-26 GHz)                                        Avantek
LISN Box                                                     University of Michigan
Signal Generator                                 X           Hewlett-Packard 8657B


                                              Page 2 of 9


                          University of Michigan Radiation Laboratory
                    FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377

3. Configuration and Identification of Device Under Test

3.1 Design and Identification of the Device
The DUT was designed by TRW Inc., 24175 Research Drive, Farmington Hills, MI 48335-2642. It is
identified as:
                         TRW Receiver
                         Model/PN(s): 218143-108, 218143-109, 218143-110
                         FCC ID: GQ4-38R
                         IC: 1470A-10R

3.2 Models
There are three (3) models of the device. The different model numbers send different CAN bus messages
over the harness to the automobile, but all are electrically identical. The DUT is a 315 MHz
superheterodyne receiver, designed for onboard automobile security/convenience applications, and as
such, it is powered from an automotive 12 VDC source. It is housed in a plastic case approximately 3 by
4 by 1.5 inches; antenna is internal. For testing, a generic harness was provided by the manufacturer. In
the receiver digital section, the decoding, signal processing, etc. are performed by a microprocessor timed
by an 10.0 MHz oscillator.

3.1 Modifications Made
There were no modifications made to the DUT by this laboratory.

4. Emission Limits

The DUT tested falls under Part 15, Subpart B, "Unintentional Radiators". The pertinent test
frequencies, with corresponding emission limits, are given in Tables 4.1 and 4.2 below.

4.1 Radiated Emission Limits

  Table 4.1. Radiated Emission Limits (Ref: FCC 15.33, 15.35, and 15.109; IC RSS-210, 2.6 Table 2).

                 Freq. (MHz)                Elim (3m) µV/m              Elim (3m) dB(µV/m)
                    30-88                         100                          40.0
                    88-216                     150 µV/m                        43.5
                   216-960                     200 µV/m                        46.0
                  960-2000                     500 µV/m                        54.0
                            Note:    Quasi-Peak readings apply to 1000 MHz (120 kHz BW)
                                     Average readings apply above 1000 MHz (1 MHz BW)

4.2 Power Line Conducted Emission Limits

       Table 4.3 Conducted Emission Limits (FCC:15.107 (CISPR); IC: RSS-Gen, 7.2.2 Table 2).

      Frequency               Class A (dBµV)                            Class B (dBµV)
         MHz           Quasi-peak         Average              Quasi-peak           Average
      .150 - 0.50         79                 66                 66 - 56*            56 - 46*
       0.50 – 5.0         73                 60                    56                  46
       5.0 – 30.0         73                 60                    60                  50




                                               Page 3 of 9


                         University of Michigan Radiation Laboratory
                   FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377

     Notes:
     1. The lower limit shall apply at the transition frequency
     2. The limit decreases linearly with the logarithm of the frequency in the range
             0.15-0.50 MHz:
     *Class B Quasi-peak: dBµV = 50.25 - 19.12*log( f )
     *Class B Average: dBµV = 40.25 - 19.12*log( f )
     3. 9 kHz RBW

4.3 Antenna Power Conduction Limits
Ref: FCC 15.111(a). Pmax = 2 nW; for frequency range see Table 4.1.

5. Emission Tests and Results

Even though the FCC and Industry Canada specify radiated and conductive emissions be measured using
the Quasi-Peak and/or average detection schemes, we normally use peak detection since Quasi-Peak is
cumbersome to use with our instrumentation. In case the measurement fails to meet the limits or the
measurement is near the limit, it is re-measured using the appropriate detection scheme. Note, a peak
detected signal is always greater than or equal to the Quasi-Peak or average detected signal. In this
report the margin of compliance may be better, but not worse than that indicated. The type of detection
used is indicated in the data table, Table 5.1.

5.1 Anechoic Chamber Radiated Emission Tests
To become familiar with the emission behavior of the DUT, the device was first studied and measured in
a shielded semi-anechoic chamber. In the chamber is a set-up similar to that of an outdoor 3-meter site,
with a turntable, antenna mast, and a ground plane. Instrumentation includes spectrum analyzers and
other equipment as needed.
         To study and test for radiated emissions, the DUT was powered by a laboratory power supply at
22 VDC. The receiver was activated, attached to a Styrofoam block, and placed on the test table on each
of the three axis. At each orientation, the table was rotated to obtain maximum signal for vertical and
horizontal emission polarizations. This sequence was repeated throughout the required frequency range.
In the chamber we studied and recorded all the emissions using a ridge-horn antenna, which covers 200
MHz to 5000 MHz, up to 2 GHz. In scanning from 30 MHz to 2.0 GHz, there were no spurious emissions
observed. Detection of the LO required the addition of an LNA. Figures 5.1 and 5.2 show emissions
measured 0-1000 MHz and 1000-2000 MHz, respectively. These measurements are made with a ridge-
horn antenna at less than 3m distance, with spectrum analyzer in peak hold mode and the receiver rotated
in all orientations. The measurements up to 1000 MHz (Fig. 5.1) are used for initial evaluation only,
while those above 1000 MHz (Fig. 5.2) are used in final assessment for compliance.

5.2 Open Area Test Site Radiated Emission Tests
After the chamber measurements are complete, emissions are re-measured on the outdoor 3-meter open
area test site up to 1 GHz using tuned dipoles and/or a high frequency biconical antenna. The
measurements were made with a spectrum analyzer using 120 kHz IF bandwidth and peak detection
mode, and, when appropriate, using Quasi-Peak or average detection (see Section 5.0). Sometimes lower
IF bandwidth is used to help bring signals out of noise and this is noted in the data table. The DUT is
placed on the test table flat, on its side, and on its end, and worst case emissions are recorded.
Photographs included in this filing show the DUT on the OATS.
         The emissions from digital circuitry were measured using a standard Bicone. These results are
also presented in Table 5.1.




                                              Page 4 of 9


                        University of Michigan Radiation Laboratory
                  FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377


5.3 Computations and Results for Radiated Emissions
To convert the dBm's measured on the spectrum analyzer to dB(µV/m), we use expression

                                 E3(dBµV/m) = 107 + PR+ KA - KG

where      PR =     power recorded on spectrum analyzer, dB, measured at 3m
           KA =     antenna factor, dB/m
           KG =     pre-amplifier gain, including cable loss, dB

        When presenting the data, at each frequency the highest measured emission under all of the
possible orientations is given. Computations and results are given in Table 5.1. There we see that the
DUT meets the limit by 9.7 dB.


5.4 Conducted Emission Tests
These tests do not apply, since the DUT is powered from a 12 VDC system.

6. Other Measurements

6.1 Emission Spectrum
The only detectable RF emission occurs at the LO or 2 x LO. The emission spectrum is measured
typically over 1 MHz span. This data is taken with the DUT close to antenna and hence amplitudes are
relative. The plot is shown in Figure 6.1.

6.2 Effect of Supply Voltage Variation
The DUT has been designed to operate from 12 VDC power. Using a spectrum analyzer, relative radiated
emissions were recorded at the LO (or 2 x LO) as voltage was varied from 5.0 to 18.0 VDC. Figure 6.2
shows the emission variation.

6.3 Operating Voltage and Current

                                   V =     12.6 VDC
                                   I =     55.0 mADC




                                    The University of Michigan
                                       Radiation Laboratory
                                       3228 EECS Building
                                  Ann Arbor, Michigan 48109-2122
                                         (734) 764-0500




                                             Page 5 of 9


                           University of Michigan Radiation Laboratory
                     FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377


                                    Table 5.1 Highest Emissions Measured

                             Radiated Emission - RF                                                TRW Honda08; FCC/IC
     Freq.    Ant.   Ant.    Pr      Det.    Ka     Kg         E3        E3lim     Pass
#     MHz     Used   Pol.   dBm      Used   dB/m    dB      dBµV/m      dBµV/m      dB              Comments
 1    325.7   Sbic    H     -79.1     Pk    19.2    22.3      24.8        46.0     21.2   max. of all, noise
 2    325.7   Sbic    V     -82.5     Pk    19.2    22.3      21.4        46.0     24.6   max. of all, noise
 3    651.4   Sbic    H     -79.9     Pk    25.5    19.2      33.4        46.0     12.6   max. of all, noise
 4    651.4   Sbic    V     -77.0     Pk    25.5    19.2      36.3        46.0      9.7   max. of all, noise
 5    977.1   Sbic    H     -80.4     Pk    29.2    17.2      38.6        54.0     15.4   max. of all, noise
 6    977.1   Sbic    V     -81.4     Pk    29.2    17.2      37.6        54.0     16.4   max. of all, noise
 7   1302.8   Horn    H     -67.2     Pk    20.7    28.1      32.4        54.0     21.6   max. of all, noise
 8   1628.5   Horn    H     -65.5     Pk    21.6    28.1      35.0        54.0     19.0   max. of all, noise
 9   1954.2   Horn    H     -63.8     Pk    22.4    28.2      37.4        54.0     16.6   max. of all, noise
10
11
12
13
14
15
16
17
18
19
20
21
22                            Digital emissions more than 20 dB below FCC/IC Class B Limit.
23
24
25
26
27
                                          Digital Radiated Emissions*
     Freq.    Ant. Ant.      Pr      Det.    Ka     Kg      E3       E3lim Pass                      Comments
#    kHz      Used Pol.     dBm      Used dB/m dB dBµV/m dBµV/m dB
1
2
3
4                        Digital emissions < 300 MHz more than 50 dB below FCC/IC Class B Limit.
5                        Digital emissions > 300 MHz more than 20 dB below FCC/IC Class B Limit.
6
7
8
9 * For devices used in transportation vehicles, digital emissions are exempt from FCC regulations per FCC 15.103(a)
                                                                                              Meas. 07/13/2007; U of Mich.




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         University of Michigan Radiation Laboratory
   FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377




Figure 5.1. Emissions measured at 3 meters in chamber, 0-1000 MHz.




Figure 5.2. Emissions measured at 3 meters in chamber, 1000-2000 MHz.




                            Page 7 of 9


                               University of Michigan Radiation Laboratory
                         FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377




                         Figure 6.1.           Relative receiver emissions (2 x LO and 4 x LO) .

                         -110.0




                         -111.0
Relative Aplitude (dB)




                         -112.0




                         -113.0




                         -114.0




                         -115.0
                                  4.0          7.0         10.0                 13.0   16.0    19.0

                                                                  Voltage (V)
                                        Figure 6.2. Relative emission vs. supply voltage.


                                                          Page 8 of 9


      University of Michigan Radiation Laboratory
FCC Part 15, IC RSS-210/Gen - Test Report %o. 415031-377




                                                           DUT on OATS




                                                  DUT on OATS (close-up)




                      Page 9 of 9



Document Created: 2007-07-16 20:07:34
Document Modified: 2007-07-16 20:07:34

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