Test Report

FCC ID: GQ43VT27R

Test Report

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FCCID_134327

The University of Michigan Radiation Laboratory 3228 EECS Building Ann Arbor, MI 48109—2122 Tel: (734) 647—1792 Measured Radio Frequency Emissions From — TRW Receiver Door Control PN:; 8$9741—A¢AA020 Report No. 415031—065 January 18, 2001 Copyright © 2001 For: TRW Automotive Electronics 24175 Research Drive Farmington Hills, MI 48335—2642 Contact: Saad Jabro Tel: 248—442—5187 Fax: 248—478—7241 PO: pending Tests supervised by: / 12 4 % Measurements made by: Report approved by: fl/ / W ._ Joseph Brunett Valdis V. Liepa Valdis V. Liepa Research Scientist Summary Tests for compliance with FCC Regulations subject to Part 15, Subpart B, and with Industry Canada Regulations subject to RSS—210, were performed on TRW RKE Receiver. This device is subject to 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 performed on January 15 and 16, 2001, the device tested in the worst case met the allowed specifications for radiated emissions from the receiver section by greater than 11.4 dB (see p. 6). The line conducted emission tests do not apply, since the device is powered from an external 12—volt DC, originating from automotive 12—volt electric system.

1. Introduction TRW superheterodyne security receiver was tested for compliance with FCC Regulations, Part 15, adopted under Docket 87—389, April 18, 1989, and with Industry Canada RSS—210, Issue 2, dated February 14, 1998. The tests were performed at the University of Michigan Radiation Laboratory Willow Run Test Range following the procedures described in ANSI C€63.4—1992 "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 2057). 2. Test Procedure and Equipment Used The test equipment commonly used in our facility is listed in Table 2.1 below. The second column identifies the specific equipment used in these tests. The HP 8§593E spectrum analyzer is used for primary amplitude and frequency reference. Table 2.1. Test Equipment. Test Instrument Equipment Used Manufacturer/Model Cal. Date/By Spectrum Analyzer X Hewlett—Packard 8593A December 2000/UM (OkHz—22GHz) SN: 3107401358 Spectrum Analyzer X Hewlett—Packard 8593E December 2000/HP (OkHz—26GHz) SN:; 3107A01131 Spectrum Analyzer Hewlett—Packard 182T/8558B December 2000/UM (0.1—1500 MHz) SN:; 1529A01114/543592 Preamplifier Watkins—Johnson December 2000/UM sls (5—1000MHz) A1ll —1 plus A25—18 Preamplifier Avantek Oct. 1999/ U of M Rad Lab (5—4000 MHz) Broadband Bicone University of Michigan June 1996/U of M Rad Lab sls (20—200 MHz) Broadband Bicone University of Michigan June 1996/U of M Rad Lab (200—1000 MHz) Dipole Antenna Set University of Michigan June 2000/UM (25—1000 MHz) Dipole Antenna Set EMCO 3121C June 2000/UM (30—1000 MHz) SN: 992 Active Loop Antenna EMCO 6502 December 1993/ EMCO (0.090—30MHz) SN: 2855 Active Rod EMCO 3301B December 1993/EMCO (30Hz—50 MHz) SN: 3223 Ridge—horn Antenna University of Michigan March 1999/U of M Rad Lab (0.5—5 GHz) LISN Box University of Michigan Dec. 1997/U of M Rad Lab Signal Cables Assorted January 1993/U of M Rad Lab X—Y Plotter Hewlett—Packard 7046A During Use/U of M Rad Lab Signal Generator Hewlett—Packard 8656A January 1990/U of M Rad Lab (0.1—990 MHz) Printer Hewlett—Packard 2225A August 1989/HP

3. Configuration and Identification of Device Under Test The DUT is a 315.0 MHz superheterodyne receiver, designed for onboard automobile security/convenience applications, and as such, it is powered from an automotive 12—volt DC source. The receiver is based on a single—chip receiver, with 325.7 MHz LO. The receiver is packaged in a plastic case approximately 2.25 x 2.75 x 1.25 inches, with attached metal mounting bracket to the case. Antenna is internal. For testing for radiated emissions, a 3 meter long section of generic harness was used, with power wires separated from the control/signal lines. In the receiver decoding and signal processing are performed by a micro. The DUT was designed and manufactured by TRW Automotive Electronics Group, 24175 Research Drive, Farmington Hills, MI 48335—2642. It is identified as: TRW Receiver Door Control PN: 89741—AA02O SN: 27 FCC ID: GQ43VT27R CANADA: 3.1 Modifications Made There were no modifications made to the DUT by this laboratory. 4. Emission Limits For FCC the DUT falls under Part 15, Subpart B, "Unintentional Radiators". For Industry Canada the DUT falls under Receiver category and is subject to technical requirement of sections 7.1 to 7.4 in RSS—210. 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 (FCC: 15.33, 15.35, 15.109; IC: RSS—210, 7.3). Freq. (MHz) Eiim (3m) uV/m E1im dB(uV/m) 30—88 100 40.0 88—216 150 43.5 216—960 200 46.0 960—2000 500 54.0 Note: Quasi—Peak readings apply to 1000 MHz (120 kHz BW) Average readings apply above 1000 MHz (1 MHz BW) 4.2 Conducted Emission Limits Table 4.2. Conducted Emission Limits (FCC: 15.107; IC: RSS—210, 6.6). Freq. (MHz) uV dB(uV) 0.450 — 1.705 250 48.0 1.705 — 30.0 250 48.0 Note: Quasi—Peak readings apply here

5. Emission Tests and Results 5.1 Anechoic Chamber Radiated Emission Tests To familiarize with the radiated emission behavior of the DUT, it was studied and measured in the shielded anechoic chamber. In the chamber there is a set—up similar to that of an outdoor 3—meter site, with 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. A 315 MHz CW signal was injected (radiated) from a nearby signal generator using a short wire antenna. The DUT was placed on the test table on each of its three axis. For each placement, 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—hom 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 other than the LO, the injection signal, and the LO harmonics. 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 3m, 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, but those above 1000 MHz (Fig. 5.2) are used in final assessment for compliance. 5.2 Open Site Radiated Emission Tests The DUT was then moved to the 3 meter Open Field Test Site where measurements were repeated up to 1000 MHz using a small bicone, or dipoles when the measurement is near the limit. The DUT was exercised as described in Sec. 5.1 above. 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. The test set—up photographs are in the Appendix (i.e., end of this report). The emissions from digital circuitry were measured using a standard bicone. These results are also presented in Table 5.1. 5.3 Computations and Results for Radiated Emissions To convert the dBm‘s measured on the spectrum analyzer to dB(uV/m), we use expression E3(dBuV/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 more than 11.4 dB. 5.4 Conducted Emission Tests These tests do not apply, since the DUT is powered from a 12—volt automotive supply.

6. Other Measurements 6.1 Emission Spectrum Near Fundamental Near operating frequency emission spectrum is measured typically over 50 MHz span with and without injection signal. These data are 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 For the subject device, the radiated emissions (i.e., LO) are extremely low and were unmeasurable in our standard (FCC) measurement set—up. 6.3 Operating Voltage and Current V —= 12.8 VDC I = 1.0 mADC The University of Michigan Radiation Laboratory 3228 EECS Building Ann Arbor, Michigan 48109—2122 (734) 647—1792

Table 5.1 Highest Emissions Measured Radiated Emission—RF TRW RX; FCC/IC Freq. Ant. Ant.| Pr Det. Ka Kg | E3 E3lim| Pass # MHz Used Pol. dBm Used dB/m dB |dBuV/mfdBuV/m dB Comments 1| 325.7 SBic H —90.1 Pk 19.2 21.7 14.4 46.0 31.6 |{max of all, noise; 10 kHz BW 2| 325.7 SBic V —88.5 Pk 19.2 21.7 16.0 46.0 30.0 |max of all, noise; 10 kHz BW 3| 651.4 SBic H —82.0 Pk 25.5 18.3 32.2 46.0 13.8 |max of all, noise; 10 kHz BW 4| 651.4 SBic V —83.0 Pk 25.5 18.3 31.2 46.0 14.8 |max of all, noise; 10 kHz BW 5| 977.1 SBic H —91.2 Pk 29.2 15.7 29.3 54.0 24.7 |max of all, noise; 10 kHz BW 6| 977.1 SBic V —90.3 Pk 29.2 15.7 30.2 54.0 23.8 |max of all, noise; 10 kHz BW 7| 1303.0 Hom H —71.0 Pk 31.8 28.1 39.7 54.0 14.3 |max of all, noise; 1 MHz BW 8| 1629.0 Hom H —70.0 Pk 33.8 28.2 42.6 54.0 11.4 |max of all, noise; 1 MHz BW 9| 1950.0 Homm H —72.0 Pk 35.5 28.1 42.4 54.0 11.6 |max of all, noise; 1 MHz BW 10 11 12 All reciever orientations were measured; no signal was observed at 3 m distance, 13 nor with the antenna on top of the DUT\ 14 15 16 Radiated Emission — Digital (Class B) 1 2 3 Digital Emissions more than 20 dB below FCC Class B limits 4 5 6 7 8 9 10 11 12 Conducted Emissions Freq. Line Det. Vtest Vlim Pass MHz Side Used| dBuV dBuV| dB Comments Not applicable Meas. 01/15,16/2001; U of Mich.

15156144 16 JAN 2001 Ar REF .9 dBm AT 190 dB PEAK — — — L1UG if 4B ./ START 9 Hz STOF 1.9000 G6Hz #REL BiH 126 khz vViu 3980 kH@ ESWP 2@R msec 15 :57 :498 16 JAN 2001 4z REF .8 dBnm AT i9 dB FEAK — " — — LQ B 1]‘5 : : : : : : : : : ......... prtrnn 6e prornnen e prrrnnne n prrnntnnn9 prevnennner n e 6666 pronnnnnet pronnr en 69 pren en n n dB._) . . — — — — . . — VA SB I : CORR NofenttccurlPrcetPciedb thed : : * n ) ' ‘v"‘-lil '(ul.&' ""Jb START & Hz STOP 1.000 GHz #RES BH 120 kHz VEBN 200 kHz SUP 209 msec Figure 5.1. Emissions measured at 3 meters in anechoic chamber, 0—1000 MHz. (top) Receiver plus ambient (bottom) Ambient

8 i6 JAN 2001 A .0 dBm #AT A dB ba se f hse hok hases fvminermdoemes hk se FEel. ... : : yLaterelodrtpahe43rtirk flL-JL»hndwamsinie Do s snitoo Pode o3000nhljtron C O q p p_abiakisumMekijil Peabatest START 1i.000 GHz SsTOP 2 .300 GHz #RES BW 1.0 MHz VEW 300 kHz SWP 20 .0 msec 16 1:i0@i16 16 JAN 2801 REF —190.0 dBm #AT B dB PEAK LQG 18 : : : : : : : : : ......... prenenn en penrnnnee pronennne preen en prr€nnnn n pev snn 6669 per€ernne> prren en n 69 peeenen dB (,-' — . — . . — . — . YA SB : ; ; : : : : 36 0P Cl luingPrthioniophas COrR ")“"“"""""‘"". uis odlcmpmtinnpent ue ons ghine 4159050004000 pothih _-"‘-'-"1"" ?"*»\*: “‘s-"fi“"‘*fi 00000: 004entrens : \.'W‘erA'J‘N\”&,»My\u?,w?'v'-,vflv’m{w_fifi‘,u":flwflm% START 1.000 6Hz SsTOP 2.000 6BHz #RES BW 1.9 MHz VBW 300 kHz SWF 290 .90 msec Figure 5.2. Emissions measured at 3 meters in anechoic chamber, 1000—2000 MHz. (top) Receiver plus ambient (bottom) Ambient

16 iA5 i2 16 JAH 2G@1 / NKR #15 .00 MHz REF .0 dBnm AT 10 dB —~21 .48 dBm PEAK L0 6 18 : : : : : : : : : fecses prts n nn e prvornnn es prr€rnvee provinnne pren en n prveninne per en en 6n prebnnnet prnens en e VA VB §C C CORR ER 325.70 MHz SPAN 40 .090 MHz #RES BW 120 kHz VBH 300 kHz SWUP 20 .9 msec Figure 6.1. Relative receiver emissions in stand—by and "locked—in" modes. The final emission measurements were made with the receiver in "locked—in" mode.


Document Created: 2001-01-22 10:46:56
Document Modified: 2001-01-22 10:46:56
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