SRA-816Digital Transmission System

Prediction of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 where:S = power density P = power input to the antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna Maximum peak output power at antenna input terminal:4.40(dBm) Maximum peak output power at antenna input terminal:2.754228703(mW) Antenna gain(typical):0(dBi) Maximum antenna gain:1(numeric) Time Averaging:100(%) Prediction distance:20(cm) Prediction frequency:2478(MHz) MPE limit for uncontrolled exposure at prediction frequency:1(mW/cm^2) Power density at prediction frequency:0.0005479363907(mW/cm^2) Margin of compliance:-32.6(dB) The MPE was done at 50% which is the operational duty cycle of this unit. 2 4R PG S π =

Nemko Test Report: 3017RUS1 Applicant: STEMCO LP 300 Industrial Blvd. Longview, Texas 75604 USA Equipment Under Test: Active AirBat (E.U.T.) In Accordance With: FCC Part 15, Subpart C, 15.247 Digital Transmission System Transmitter Tested By: Nemko USA, Inc. 802 N. Kealy Lewisville, Texas 75057-3136 TESTED BY: DATE: 01 February 2007 David Light, Senior Wireless Engineer APPROVED BY: DATE: 01 February 2007 Kevin Rose, Senior Wireless Engineer Number of Pages: 31 Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 2 of 31 Table of Contents SECTION 1. SUMMARY OF TEST RESULTS 3 SECTION 2. EQUIPMENT UNDER TEST (E.U.T.) 5 SECTION 3. OCCUPIED BANDWIDTH 6 SECTION 4. MAXIMUM PEAK OUTPUT POWER 9 SECTION 5. RADIATED EMISSIONS 11 SECTION 6. PEAK POWER SPECTRAL DENSITY 18 SECTION 7. TEST EQUIPMENT LIST 21 ANNEX A - TEST DETAILS 22 ANNEX B - TEST DIAGRAMS 30 Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 3 of 31 Section 1. Summary of Test Results Manufacturer: STEMPCO, LLP Model No.: Active AirBat Serial No.: None General: All measurements are traceable to national standards. These tests were conducted on a sample of the equipment for the purpose of demonstrating compliance with Part 15, Subpart C, Paragraph 15.247 for Digital Transmission Systems. Radiated tests were conducted is accordance with ANSI C63.4-2003. Radiated emissions are made on an open area test site. A description of the test facility is on file with the FCC. New Submission Production Unit Class II Permissive Change Pre-Production Unit THIS TEST REPORT RELATES ONLY TO THE ITEM(S) TESTED. THE FOLLOWING DEVIATIONS FROM, ADDITIONS TO, OR EXCLUSIONS FROM THE TEST SPECIFICATIONS HAVE BEEN MADE. See “ Summary of Test Data”. Nemko USA Inc. authorizes the above named company to reproduce this report provided it is reproduced in its entirety and for use by the company’s employees only. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Nemko USA Inc. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This report applies only to the items tested. Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 4 of 31 Summary Of Test Data NAME OF TEST PARA. NO. RESULT Powerline Conducted Emissions 15.207(a) NA (2) Minimum 6 dB Bandwidth 15.247(a)(2) Complies (1) Maximum Peak Power Output 15.247(b)(3) Complies (1) Spurious Emissions 15.247(d) / 15.205 Complies (1) Peak Power Spectral Density 15.247(e) Complies (1) Footnotes: 1) All measurements were made radiated using the signal substitution method. The device has an integral antenna 2) This device is battery powered. Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 5 of 31 Section 2. Equipment Under Test (E.U.T.) General Equipment Information Frequency Band (MHz): 902-928 2400-2483.5 5725-5850 Operating Frequency of Test Sample: 2404 to 2478 MHz Channel Spacing: 1 MHz User Frequency Adjustment: Software controlled Description of EUT 2.4 GHz DSSS transmitter used to monitor tire pressure in automotive industry. Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 6 of 31 Section 3. Occupied Bandwidth NAME OF TEST: Occupied Bandwidth PARA. NO.: 15.247(a)(2) TESTED BY: David Light DATE: 01 February 2007 Test Results: Complies. Measurement Data: See 6 dB BW plot Measured 6 dB bandwidth: 880 kHz Max Channel Separation: 1 MHz Test Conditions: 55 %RH 23 °C Measurement Uncertainty: +/-1x10 -7 ppm Test Equipment Used: 1464-1484-1485-1016-993 Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 7 of 31 Test Data – Occupied Bandwidth 6 dB Bandwidth Low channel 6dB Bandwidth Mid channel Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 8 of 31 Test Data – Occupied Bandwidth 6 dB Bandwidth High channel Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 9 of 31 Section 4. Maximum Peak Output Power NAME OF TEST: Maximum Peak Output power PARA. NO.: 15.247(b)(3) TESTED BY: David Light DATE: 01 Febrauay 2007 Test Results: Complies. Measurement Data: Frequency Meter Substitution Pre-AmpSubstitution EIRP Limit Margin Reading Level Gain Antenna Gain (MHz) (dBm) (dBm) (dB) (dBi) (dBm) (dBm) (dB) 2404 -5.5 -3.4 32.8 7.8 4.4 36.0 -31.6 2441 -7.7 -5.6 32.8 7.8 2.2 36.0 -33.8 2478 -5.5 -3.4 32.8 7.8 4.4 36.0 -31.6 Antenna Gain: 3 dBi max Calculated Conducted Power: 1.4 dBm (1.38 mW) Analyzer Settings: RBW=VBW=1 MHz Test Conditions: 55 %RH 22 °C Measurement Uncertainty: +/-1.7 dB Test Equipment Used: 1464-1484-1485-1016-993 For battery powered equipment, the device was tested with a fresh battery per 15.31(e). The device was tested on three channels per 15.31(l). This test was performed radiated. Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 10 of 31 Nemko USA, Inc. FCC PART 15, SUBPART C Digital Transmission Systems EQUIPMENT: Active AirBat Test Report No.: 3017RUS1 Page 11 of 31 Section 5. Radiated Emissions NAME OF TEST: Radiated Emissions PARA. NO.: 15.247 (d) TESTED BY: David Light DATE: 01 February 2007 Test Results: Complies. Measurement Data: See attached table. Test Conditions: 55 %RH 23 °C Measurement Uncertainty: +/-1.7 dB Test Equipment Used: 1464-1484-1485-1016-993-1082-759-1195-791 Notes: The EUT was tested on three orthogonal axis’ The device was tested from 30 MHz to the tenth harm…

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Radiated Photographs