Test Report

FCC ID: L2C0013TR

Test Report

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FCCID_142024

The University of Michigan Radiation Laboratory 3228 EECS Building Ann Arbor, MI 48109—2122 Tel: (734) 647—1792 Measured Radio Frequency Emissions From * Delphi—Delco PASS—Key III (Catera) Immobilizer Module Model: L2COO13TR Report No. 415031—078 March 13, 2001 Copywrite © 2001 For: Delphi—Delco Electronics Systems One Corporate Center Kokomo, IN 46904—9005 PO: verbal/Bill Lusa, Defiance Contact: Fiean Liem Tel: 414—768—2059 Fax: 414—768—2820 * Tests supervised by: Measurements made by: Valdis Liepa Report approved by: Valdis V. Liepa Research Scientist Summary Tests for compliance with FCC Regulations, Part 15, Subpart C, and for compliance with Industry Canada RSS—210, were performed on Delphi—Delco Immobilizer Module. This device is subject to Rules and Regulations as a transmitter, but such measurements were made to access the device‘s overall emissions. In testing performed February 6 and 18, 2001, the device tested in the worst case met the allowed specifications for transmitter radiated emissions by 35.4 dB (seep. 6); the digital emission, Class B, were met by at least 20 dB. The conductive emission tests do not apply, since the device is powered from an automotive 12 VDC battery.

1. Introduction Delphi—Delco Immobilizer Module was tested for compliance with FCC Regulations, Part 15, adopted under Docket 8$7—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 §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: 3107A01358 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 X Watkins—Johnson December 2000/UM (5—1000MHz) A1l —1 plus A25—18 Preamplifier Avantek Oct. 1999/ U of M Rad Lab (5—4000 MHz) Broadband Bicone X University of Michigan June 1999/U of M Rad Lab (20—200 MHz) Broadband Bicone X University of Michigan June 1999/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 y (30—1000 MHz) SN: 992 Active Loop Antenna X EMCO 6502 December 1999/UM (0.090—30MHz) SN: 2855 Active Rod EMCO 3301B December 1999/UM (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. 2000/U of M Rad Lab Signal Generator Hewlett—Packard 8657B January 2000/Uof M Rad Lab (0.1—2060 MHz)

3. Configuration and Identification of Device Under Test The DUT is a car security system that electronically identifies the "real" ignition key for the car. The system tested consisted of a T/R module (including coupling coil antenna) and a "passive" transponder imbedded in a special key. The transponder in the key is considered passive because it uses the energy supplied by the transmitter coil to operate its micro and, hence, is not subject to the regulations. A two—meter, multi—wire harness was used in testing to provide power from 13.8 VDC laboratory power supply. The DUT was designed and manufactured by Delphi—Delco. It is identified as: Delphi—Delco PASS—Key III (Catera) Immobilizer Module Model: L2COO13TR SN: 80002830053 FCC ID: L2COO13TR CANADA: to be provided by IC Two modules were provided and one was arbitrarily chosen for testing. 3.1 EMI Relevant Modifications None. 4. Emission Limits 4.1 Radiated Emission Limits The DUT tested falls under the category of an Intentional Radiators and the Digital Devices, subject to Subpart C, Section 15.209; and Subpart B, Section 15.109 (transmitter generated signals excluded); and Subpart A, Section 15.33. The applicable testing frequencies with corresponding emission limits are given in Tables 4.1 and 4.2 below. As a digital device, it is exempt. Table 4.1. Radiated Emission Limits (FCC: 15.205, 15.35; IC: RSS—210 (6.2.2(r), 6.3)). (Transmitter) Fundamental Frequency and Spurious* w (MHz) (uV/m) 0.009—0.490 2400/F(kHz), 300m 0.490—1.705 24,000/F(kHz), 30m 0.090—0.110 Restricted 0.49—0.51 Bands * Harmonics must be below the fundamental. For extrapolation to other distances, see Section 6.6.

Table 4.2. Radiated Emission Limits (FCC: 15.33, 15.35, 15.109; IC: RSS—210, 6.2.2(r)). (Digital Class B) Freq. (MHz) E1;p (3m) uV/m Eim dB(uV/m) 30—88 100 40.0 88—216 150 43.5 216—960 200 46.0 960—2000 500 54.0 Note: Average readings apply above 1000 MHz (1 MHz BW) Quasi—Peak readings apply to 1000 MHz (120 kHz BW) 4.2 Conductive Emission Limits The conductive emission limits and tests do not apply here, since the DUT is powered from an automobile 12VDC system. 5. Radiated Emission Tests and Results 5.1 Anechonic Chamber Measurements To familiarize with the radiated emission behavior of the DUT, the DUT was first studied and measured in a shielded anechoic chamber. In the chamber there is a set—up similar to that of an outdoor 3—meter site, with a turntable, an antenna mast, and a ground plane. Instrumentation includes spectrum analyzers and other equipment as needed. In this case, the receiving antenna was an active loop, placed on a tripod, approximately 1.5 meters above ground. The DUT was laid on the test table as seen in the Attachment—Test Setup Photos. Using the loop antenna we studied emissions up to 2 MHz. The spectrum analyzer resolution and video bandwidths were usually set to 1 kHz, and sometimes to 300 Hz. Emissions were studied with the plane of the loop perpendicular and parallel to the direction of propagation from the DUT. Larger emissions were observed when the loop was perpendicular. In the chamber we also recorded the spectrum and modulation characteristics of the carrier. These data are presented in subsequent sections. In scanning from 0.0—2.0 MHz there were no spurious emissions observed other than harmonics. In some instances, it was difficult to separate the DUT emissions from AM band signals. 5.2 Outdoor Measurements ' — After the chamber measurements, the emissions on our outdoor 3—meter site were measured. For transmitter emissions a loop antenna was used; the resolution bandwidth was usually 1 kHz. See Appendix for measurement set—up. For digital emissions bicone and dipole antennas were used. See Section 6.6 for field extrapolation of transmitter data from 3 m to 300 m. 5.3 Computations and Results To convert the dBm measured on the spectrum analyzer to dB(uV/m), we use expression Es(dBuV/m) = 107 + Pr + Ka — Kg + Kg where Pr = power recorded on spectrum analyzer, dB, measured at 3 m Ka = antenna factor, dB/m Kg = pre—amplifier gain, including cable loss, dB Kp = pulse operation correction factor, dB (see 6.1) 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 as a transmitter, the DUT meets the limit by 35.4 dB. The digital emissions, Class B, were met by at least 20 dB.

6. Other Measurements and Computations 6.1 Correction For Pulse Operation In normal a operation the transmitter is activated when a key is placed into the ignition. When the ignition key is turned on, an interrogation signal is on continuous. See Figure 6.1. The averaging factor for such operation is Kg = 100 ms / 100 ms = 1.00 or 0.0 dB 6.2 Emission Spectrum Using the loop antenna, the emission spectrum was recorded and is shown in Figure 6.2. Unfortunately, the measurement is contaminated by AM stations. 6.3 Bandwidth of the Emission Spectrum The measured spectrum of the signal is shown in Figure 6.3. From the plot we see that the —20 dB bandwidth is 4.15 kHz and the center requency is about 128.5 kHz. Note, the signal is bouncing between the two peaks (FSK). 6.4 Effect of Supply Voltage Variation The DUT has been designed to be operated from an automobile 12VDC system. For this test, the relative power radiated was measured at the fundamental as the voltage was varied from 7.0 to 18.0 volts. The emission variation is shown in Figure 6.4. 6.5 Input Voltage and Current V = 12.6 V I = 150.0 MA (CW FSK) 6.6 Field Behavior at 134 kHz Because at the specified 300 m measurement distance the signal is too small to measure, measurements were made at 3 m. To relate the 300 m distance to the 3 m, field attenuation experiments were performed (August 17, 1994) using two loops, one transmitting, the other receiving. Even then we could only go up to 50 m before noise became a factor. Measurements were made with the loops coplanar (planes of the loops in the same plane) and with loops axial (same axis for both loops). Figures 6.5 and 6.6 show results. From these we then deduce the difference in dB between the 300 m and 3 m distances is: Coplanar case: 0.0 — (—112.4) = 112.4 dB (56 dB/decade) Axial case: — 6.0 — (— 96.1) = 90.1 dB (45 dB/decade) The University of Michigan Radiation Laboratory 3228 EECS Building Ann Arbor, Michigan 48109—2122 (734) 647—1792

Table 5.1 Highest Emissions Measured Transmitter Radiated Emissions Delphi—Delco Immob; FCC/IC Freq. Ant. Ant.| Pr,3m| Det.| Ka Kg E300* |[E30O0lim Pass # kHz Used |Orien.| dBm |Used|dB/m| dB |dBuV/mdBuV/m _dB Comments 1| 128.7| Loop V —36.6 Pk 9.9 0.0 — 9.8 25.6 35.4 |loop normal (axis in dir. of prop.) 2| 128.7| Loop V —43.1 Pk 9.9 0.0 —16.3 25.6 41.9 |loop planar (loop in dir. of prop.) 3 2574] Loop V —71.3 Pk 9.8 0.0 —44.6 25.6 70.2 |loop normal, noise 4 257.4| Loop V —71.1 Pk 9.8 0.0 —44.4 25.6 70.0 |loop planar, noise 5 386.1| Loop V —77.0 Pk 9.8 0.0 —50.3 25.6 75.9 [loop normal, noise 6 386.1| Loop V —77.6 Pk 9.8 0.0 —50.9 25.6 76.5 |loop planar, noise 7 514.8| Loop V —83.1 Pk 9.8 0.0 —56.4 25.6 82.0 |loop normal, noise 8 514.8] Loop V —814 Pk 9.8 0.0 —54.7 25.6 80.3 [loop planar, noise 9 643.5| Loop V —84.4 Pk 9.8 0.0 —57.7 25.6 83.3 |loop normal, noise 10| 643.5]| Loop V —82.5 Pk 9.8 0.0 —55.8 25.6 81.4 |loop planar, noise All other harmonics/orientations are in the noise (Pr < —70 dBm) * The averaging factor is 0.0 dB; data is extrapolated to 300m distance 1 kHz RIBW usled in thel measulrementls Digital Radiated Emissions, Class B Freq. Ant. Ant.| Pr Det.| Ka Kg E3 E3lim Pass # MHz Used Pol. dBm |Used|dB/m| dB {A@BuV/midBuV/m dB Comments Meets class B limit by more than 200B Conducted Emissions Freq. Line Det. Vtest Vlim] Pass # MHz Side Used| dBuV |dBuV| dB Comments 1 2 Not applicable 3 Meas. 02/06/01, 02/18/01; U of Mich.

12:87+}42 i8 FEB 2801 ze REF 48@.0 dgm at 5q ag PEAK LaG 19 dB / CENTER 128.5 kHz SPAN A Hz #RES BW 10 kHz VBW 10 kHz #SWP 1.00 sec Figure 6.1. Transmission modulation characteristics. 12:15§i37? 18 FEB 20014 Azr MKR 130 kHz REF 20.0 dBm AT 30 dB 16 .65 d6m PERK — — " T — ~ T " ............................................................................................ ................................................................ VA se {Of $C FELAh...cbundf lld... “E‘ cork Sonfpfofpe START R Hz sTOP 2.00a AMHz #RES BW 190 kHz VBW 190 kHz SWP 6@ .0 msec Figure 6.2. Emission spectrum of the DUT. , The amplitudes are only indicative (not calibrated).

12:i25:i05 18 FEB 2001 4z MKR a 4.15 kHz REF 20.0 dBn AT 32 dB ~1 .79 dB PERAK — — — — — " — — 19 |es.e. beoges Rasks. e Rasll. bees dn e dBn” + — « — — . — — — ragefis Pss for cce frco fos cccoafacfs s ce ocb ooo ccat cce Bshiccccessrccccccreccrererr esd aav e VA S8 $C FCL_ CORR CENTER 130.00 kHz SPAN 1G@.00 kHz #RES BW 100 Hz VBW 180 Hz SWNP 3.00 sec Figure 6.3. Measured bandwidth of the DUT. (CW FSK) 2 a 14— a 3B= 0— C & <C B33 71 6 M lg . '3 * t * 1 * ———————— 1 r 6 8 10 12 14 16 18 20 Supply Voltage, VDC Figure 6.4. Relative emission at 130 kHz vs. supply voltage.

20 y = 25.708 + —55.749"°LOG(x) R"2 = 0.998 3 ~| o0B c20— | Loops Coplanar rs" 8 T B040 cd 2 —60 —80 r r——— r——c——p——r y—— 0 10 20 30 40 50 Distance, m Figure 6.5. Field attenuation for case of coplanar loops. 0 —10 = y = 17.029 + —45.680*LOG(x) R"2 = 0.996 Relative Amplitude, dB 20 — —30 — —40 — —50 — —60 — —70 T T T T T T T T T T T 0 10 20 30 40 50 60 Distance, m Figure 6.6. Field attenuation for case of axial loops.


Document Created: 2001-03-21 11:05:33
Document Modified: 2001-03-21 11:05:33
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