BSYWT-5541449 MHz Walkie Talkie - TX

TABLE OF CONTENTS LIST APPLICANT:GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 TEST REPORT CONTAINING: PAGE 1......TEST PROCEDURE PAGE 2......TEST PROCEDURE CONTD. AND CIRCUIT DESCRIPTION PAGE 3......RADIATION INTERFERENCE TEST DATA PAGE 4......OCCUPIED BANDWIDTH TEST DATA EXHIBITS CONTAINING: EXHIBIT 1............POWER OF ATTORNEY LETTER EXHIBIT 2............BLOCK DIAGRAM EXHIBIT 3............SCHEMATIC EXHIBIT 4............INSTRUCTION MANUAL EXHIBIT 5............SAMPLE OF FCC ID LABEL EXHIBIT 6............LOCATON OF FCC ID LABEL EXHIBIT 7............EXTERNAL PHOTO - FRONT SIDE EXHIBIT 8............EXTERNAL PHOTO - BACK SIDE EXHIBIT 9............INTERNAL PHOTO - COMPONENT SIDE EXHIBIT 10...........INTERNAL PHOTO - COPPER SIDE EXHIBIT 11...........OCCUPIED BANDWIDTH PLOT - LOUD VOICE APPLICANT: GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 REPORT #: F:\CUS\G\GMT\GMT165H8.TX PAGE: TABLE OF CONTENTS LIST APPLICANT:GMT INDUSTRIAL LTD. FCC ID:BSYWT-55414 TEST EQUIPMENT LIST 1. Spectrum Analyzer: Hewlett Packard 8566B, with preselector HP 85685A, & Quasi-Peak Adapter HP 8565OA, & HP 8449B OPT H02 Cal. 9/30/97 2. Eaton Biconnical Antenna Model 94455-1 20-200 MHz Serial No. 0997 Cal. 9/17/97 3. Electro-Metric Dipole Kit, 20-1000 MHz, Model TDA 25 cal. 5/15/97 4. Electro-Metric Horn 1-18 GHz, Model RGA-180, Cal. 9/24/97 5. Electro-Metric Antennas Model TDS-25-1, TDS-25-2, 9/3/97 6. Electro-Metric Line Impedance Stabilization Network Model No. EM-7821, Serial No. 101; 100KHz-30MHz 50uH. 9/30/97 7. Electro-Metric Line Impedance Stabilization Network Model No. EM-7820, Serial No. 2682; 10KHz-30MHz 50uH. 9/30/97 TEST PROCEDURE GENERAL: This report shall NOT be reproduced except in full without the written approval of TIMCO ENGINEERING, INC. RADIATION INTERFERENCE: The test procedure used was ANSI STANDARD C63.4-1992 using a HEWLETT PACKARD spectrum analyzer with a prese- lector. The bandwidth of the spectrum analyzer was 100 kHz with an appropriate sweep speed. The analyzer was calibrated in dB above a microvolt at the output of the antenna. The resolution bandwidth was 100KHz and the video bandwidth was 300KHz. The ambient temperature of the UUT was 80oC with a humidity of 76%. FORMULA OF CONVERSION FACTORS: The Field Strength at 3m was estab- lished by adding the meter reading of the spectrum analyzer (which is set to read in units of dBuV) to the antenna correction factor sup- plied by the antenna manufacturer. The antenna correction factors are stated in terms of dB. The gain of the Preselector was accounted for in the Spectrum Analyzer Meter Reading. Example: Freq (MHz) METER READING + ACF = FS 33 20 dBuV + 10.36 dB = 30.36 dBuV/m @ 3m POWER LINE CONDUCTED INTERFERENCE: The procedure used was ANSI STAN- DARD C63.4-1992 using a 50uH LISN. Both lines were observed. The bandwidth of the spectrum analyzer was 10kHz with an appro- priate sweep speed. The ambient temperature of the UUT was 80oC with a humidity of 76%. APPLICANT: GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 REPORT #: F:\CUS\G\GMT\GMT165H8.TX PAGE #: 1 TEST PROCEDURES CONTINUED APPLICANT:GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 ANSI STANDARD C63.4-1992 10.1.7 MEASUREMENT PROCEDURES: The unit under test was placed on a table 80 cm high and with dimensions of 1m by 1.5m. The table used for radiated measurements is capable of continuous rotation. When an emission was found, the table was rotated to produce the maximum signal strength. At this point, the antenna was raised and lowered from 1m to 4m. The antenna was placed in both the horizontal and vertical planes. The situation was similar for the conducted measurement except that the table did not rotate. The EUT was setup as described in ANSIC63.4-1992 with the EUT 40 cm from the vertical ground wall. CIRCUIT_DESCRIPTION: In the transmit the audio from the microphone MIC1 is amplified in IC1 which amplifies the audio and also turns on the RF portion of the transmitter. When IC1 activates the transmitter it mutes the receiver. When the transmitter is turned on by Q1 & Q2 the crystal controlled oscillator Q3 is turned on. From Q3 the RF signal goes to the RF amplifier Q5 and then through the low pass filter, C26, L2 C3, & L1 to the antenna. ANTENNA_AND_GROUND_CIRCUITRY This unit makes use of a external 5" antenna. The antenna is inductively coupled. This unit is powered from a 9.0V battery. No ground connection is provided. The unit relies on the ground tract of the printed circuit board. APPLICANT: GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 REPORT #: F:\CUS\G\GMT\GMT165H8.TX PAGE #: 2 APPLICANT: GMT INDUSTRIAL LTD. FCC ID: BSYWT-55414 NAME OF TEST: RADIATION INTERFERENCE RULES PART NO.: 15.235 REQUIREMENTS:CARRIER FREQUENCY WILL NOT EXCEED 80 dBuV/m AT 3M. OUT-OF-BAND EMISSIONS SHALL NOT EXCEED: 30 - 88 MHz 40.0 dBuV/M MEASURED AT 3 METERS 88 - 216 MHz 43.5 dBuV/M 216 - 960 MHz 46.0 dBuV/M ABOVE 960 MHz 54.0 dBuV/M TEST DATA: EMISSION METER READING COAX ANTENNA FIELD FREQUENCY AT 3 METERS LOSS CORRECTION STRENGTH MARGIN ANT. MHz dBuV dB FACTOR dB dBuV/m@3m dB POL. 49.86 63.40 0.25 10.99 74.64 5.36 V 99.70 28.10 0.80 8.39 37.29 6.21 V 199.46 9.90 0.90 12.66 23.46 20.04 V 249.30 28.20 1.20 13.35 42.75 3.25 H 299.17 26.70 1.40 15.65 43.75 2.25 H 349.00 28.20 1.40 15.52 45.12 0.88 H 398.91 26.80 1.40 16.97 45.17 0.83 H 448.65 18.10 1.60 18.12 37.82 8.18 H 498.65 15.10 1.60 19.27 35.97 10.03 H 548.40 10.70 1.60 19.69 31.99 14.01 H 648.20 20.50 1.60 21.16 43.26 2.74 H SAMPLE CALCULATION: FSdBuV/m = MR(dBuV) + ACFdB. TEST PROCEDURE: The procedure used was ANSI STANDARD C63.4-1992. The spectrum was scanned from 30 MHz to 1000 MHz. When an emission was found, the table was rotated to produce the maximum signal strength. The antenna was placed in both the horizontal and vertical planes and the worse case emissions were reported. The UUT was tested in 3 orthogonal planes. TEST RESULTS: THE UNIT DOES MEET THE FCC REQUIREMENTS. PERFORMED BY: S. S. SANDERS DATE: JULY 16, 1998 APPLICANT: GMT INDUSTRIAL LTD. FCC ID: BSYWT-55…

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