Engineering Statement

0003-EX-PL-2007 Text Documents

CATERPILLAR, INC.

2007-01-12ELS_79266

ENGINEERING STATEMENT TO ACCOMPANY REQUEST FOR EXPERIMENTAL LICENSE FOR CATERPILLAR, INC. AT PROVING GROUNDS LOCATED IN PEORIA, ILLINOIS AND TUCSON, ARIZONA JANUARY 2007 COHEN, DIPPELL AND EVERIST, P.C. CONSULTING ENGINEERS RADIO AND TELEVISION WASHINGTON, D.C.

COHEN, DIPPELL AND EVERIST, P. C. City of Washington ) ) ss District of Columbia ) Donald G. Everist, being duly sworn upon his oath, deposes and states that: He is a graduate electrical engineer, a Registered Professional Engineer in the District of Columbia, and is President, Secretary and Treasurer of Cohen, Dippell and Everist, P.C., Consulting Engineers, Radio — Television, with offices at 1300 L Street, N.W., Suite 1100, Washington, D.C. 20006; That his qualifications are a matter of record in the Federal Communications Commission; Thatthe attached engineering report was prepared by him or under his supervision and direction and That the facts stated herein are true of his own knowledge, except such facts as are stated to be on information and belief, and as to suchfacts he believes them to be—truel 4 District of Columbxa”\ 6. » Professional Englneer& 4 x¥ Registration No. 5714 ‘ Subscnbed and sworn to before me this [[ t‘éday of %m &n _ , 2007. No éry Public My Commission Expires: _7 2+ / 279 7

Cohen, Dippell and Everist, P.C. Engineering Statement Caterpillar, Inc. Page 1 This engineering statement has been prepared on behalf of Caterpillar, Inc. (ACaterpillar@) and accompanies its submission of FCC Form No. 442. The request is to obtain an experimental license to operate as needed for brief intervals in which primarily critical electronic components on large earth moving equipment is subject to electromagnetic fields investigation. The purpose of the electromagnetic investigation is to ensure that manufacturer=s compliance is achieved by the device or equipment under test as well as compliance with European and other industry certification requirements. Due to the nature of the large vehicles that need to be subject to this rigorous testing, it is currently not practical to conduct this investigation in an enclosed anechoic chamber environment. Caterpillar has two large tracts of land constructed for Proving Ground which offer an ideal outdoor environment for this investigation. The outdoor tests would then not be limited by a vehicle size constraint since the caliber of Caterpillar manufactured products tends to be rather extensive. Each site is ideal since there is an existing concrete pad, and building in which to devise the various investigations. Some of these investigations involve raising the earth moving equipment off the ground by a specially devised stand so that the equipment can be fully operational and running during the electromagnetic testing. Special monitoring devices are placed on the equipment under test to observe the various functions of the performance on control and other circuitry. As disclosed in Page 3 of FCC Form 442, the two sites are located near Peoria, Illinois and near Tucson, Arizona.

Cohen, Dippell and Everist, P.C. Engineering Statement Caterpillar, Inc. Page 2 Proposed Test Site Peoria, Illinois Proving Grounds N 401 44= 48@ E 891 28= 22@ WGS 84 Proposed Test Site Tucson, Arizona Proving Grounds 311 49= 38@ 1111 08= 38@ WGS 84 The equipment under test (AEUT@) is typically those components which have an electronic function and possibly be subjected to some deviation if operated in a high electromagnetic field environment. As stated above, a specially devised stand is required for monitoring of various earth moving equipment while the vehicle is engaged in a normal performance mode. Because of the wide-range in frequencies that the EUT must be subjected to, various antennas are used in the testing phase. These include a horn style, log periodic yagi and other broadband antennas typically employed for these types of investigations. The antennas are typically mounted 3 to 5 meters from the component being subject to scrutiny. As shown in response to Page 2 of FCC Form 442 the other equipment used to generate this electromagnetic energy is as follows: The following items are for use under the requested Experimental Radio Service License:

Cohen, Dippell and Everist, P.C. Engineering Statement Caterpillar, Inc. Page 3 Manufacturer Model # (Or Equivalent) RF Powerlabs 220-1K60L Amplifier Research 15A250 Amplifier Research 500W1000M7 Amplifier Research 120S1G3 Amplifier Research 100W1000M1 Amplifier Research 150A100A Agilent Technologies 8648D Hewlett Packard 8648C NOTE: Since the equipment to be used is not intended for use in communication systems, no provisions exist for station identification. Therefore, exemption from the Part 5.115 station identification requirements is requested. Caterpillar, while a holder of the experimental equipment license, plans to contract out the actual investigation to a company familiar with conducting this type of electromagnetic investigation. Since this is only a part of the EUT procedures necessary to conduct an investigation on large earth moving equipment, Caterpillar personnel will be involved in the overall investigation and hence present. In addition, not only standards of good engineering practice will be used but FCC Rules, Part 2 and Part 5 will be available as reference. Caterpillar or its contractor will coordinate with various public safety agencies in the area. These include fire, rescue, police and other governmental entities, local and Federal. These frequencies that are identified in use are excluded from the test. In addition, public data on frequencies used by these agencies will also be reviewed. Since this EUT is conducted with relatively low-power, broadcast stations, that operate with very high power in comparison to the

Cohen, Dippell and Everist, P.C. Engineering Statement Caterpillar, Inc. Page 4 specially devised test configuration, are not notified nor are they considered. However, if a unique situation develops and interference results, that particular frequency will be removed from further use. As indicated above, these investigations are performed over relatively brief periods of time and are not conducted on a regular schedule. Each frequency that is used in the investigation may be active for a brief period of time. There is no construction of facilities involved since the existing concrete pad and building and all test equipment is portable, and removed once the electromagnetic investigation is completed. Therefore, there is no environmental impact. The Caterpillar staff indicates that the immediate test area will have signage to avoid any possible radio frequency field value exposures in excess of FCC guidelines. We understand that the Proving Ground has restricted access.


Document Created: 2007-01-12 17:13:39
Document Modified: 2007-01-12 17:13:39
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