Revised MPE Calculation

FCC ID: AJK8222259

RF Exposure Info

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FCCID_2813055

                                                   849 NW STATE ROAD 45
                                                   NEWBERRY, FL 32669 USA
                                                   PH: 888.472.2424 OR 352.472.5500
                                                   FAX: 352.472.2030
                                                   EMAIL: INFO@TIMCOENGR.COM
                                                   HTTP://WWW.TIMCOENGR.COM




              RF Exposure Evaluation Report


                APPLICANT                     ROCKWELL COLLINS
                                          AIR TRANSPORT SYSTEMS
                                        1300 WILSON BLVD. SUITE 200
                                          ARLINGTON VA 22209 USA
                      FCC ID                       AJK8222259
          MODEL NUMBER                              RTA-4218
                PRODUCT
                                                WEATHER RADAR
             DESCRIPTION
     STANDARD APPLIED                          CFR 47 Part 2.1091
             PREPARED BY                           Cory Leverett


We, TIMCO ENGINEERING, INC. would like to declare that the device has been
evaluated in accordance with 47 CFR Part 2.1091 and meets the requirements.

The attached report shall not be reproduced except in full without the written
approval of TIMCO ENGINEERING, INC.


GENERAL REMARKS


Attestations

This equipment has been evaluated in accordance with the standards identified in
this report. To the best of my knowledge and belief, these evaluations were
performed using the procedures described in this report.

I attest that the necessary evaluations were made, under my supervision, at:

Timco Engineering Inc.
849 NW State Road 45
Newberry, FL 32669




Authorized Signatory Name:

Cory Leverett

Engineering Project Manager

Date:           11/12/2015




Applicant: ROCKWELL COLLINS
FCC ID:    AJK8222259
Report:    R\ROCKWELL_AJK\2061UT15\2061UT15TestReport.docxt
                                                                        Page 2 of 4


                       RF Exposure Requirements

General information

Device type: WEATHER RADAR

Devices that operate under Part 87 of this chapter are subject to RF exposure
evaluation prior to equipment authorization or use.

Antenna

The manufacturer does not specify an antenna, but a typical antenna has a gain of
0 dBi.


     Configuration      Antenna p/n            Type                      Max. Gain (dBi)
    Fixed mounted           Any                omni                             0


Operating confiquration and exposure conditions:

The conducted output power is shown in the table below. Typical use qualifies for a
maximum duty cycle factor of 100%.

Operation: A typical installation consists of an antenna system with a 10 meter
coaxial cable of the type RG 213/ U type which has a loss as follows;

Nom. Attenuation for RG 213/U:
                     Frequency              Attenuation per 100ft.
                        MHz                           dB
                          1                          .27
                         10                          .55
                         50
                        100
                        200
                        400
                        700
                        900
                       1000
                       4000

MPE Calculation:

The minimum separation distance is calculated as follows:


                              (30xPxG                                :      E
                     E(V m) = ————          Power dersity. P,(mIW /em ) =
                                 d                   e                      3770


The limit for general uncontrolled exposure environment is shown in FCC rule Part
1.11310, Table 1.



                               Minimum Separation Distance for Mobile or Fixed Devices
                                               Controlled Exposure

                Insert values in yellow highlighted boxes to determine Minimum Separation Distance
Max Power                      50 W           equals    Max Power                 50000 mW
Duty Cycle                       2%           equals    Duty Factor                0.02 numeric
Antenna Gain                 30.3 dBi         equals    Gain numeric        1071.519305 numeric
Coax Loss                        0 dB                   Gain - Coax Loss    1071.519305 numeric
                                          2
Power Density                  5 mW/cm
Enter power Density from the chart to the right                   Rule Part 1.1310, Table 1 (A)
Frequency                9476.9 MHz                    Freq range       Power density Enter this value
                                                                                      2              2
                                                             MHz              mW/cm        mW/cm
                                                            0.3 - 3            100          100
                                                                                  2
                                                              3 - 30          900/f          0.0
                                                             30-300             1             1
                                                            300-1,500         f/300          31.6
                                                         1,500-100,000          5             5
                                                       f = frequency in MHz


Minimum Separation Distance                                      131 cm                        1.31 m
Minimum Seperation in Inches       51.37412 Inches




Applicant: ROCKWELL COLLINS
FCC ID:    AJK8222259
Report:    R\ROCKWELL_AJK\2061UT15\2061UT15TestReport.docx



Document Created: 2019-10-11 11:13:30
Document Modified: 2019-10-11 11:13:30

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