ONKFR-464

October 28, 1999 Ms. Katie Hawkins Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 SUBJECT: AIRTECH INFORMATION & COMMUNICATION CO., LTD.’S FCC ID: ONKFR-464 CONFIRMATION # EA94994 REFERENCE: YOUR CORRESPONDECE ID # 10392 Dear Ms. Hawkins: Earlier today I sent you an audio frequency response plot in reply to your correspondence ID # 10392. Our plotting software was in error and did not extend beyond 3 kHz and in order to get the data that you requested, the software incorrectly plotted the data from 3-5 kHz. I’ve sent a new audio frequency response plot that is correct. Should you have any questions, please advise. Regards, Sharon A. Hoffman/TIMCO ENGINEERING, INC.

TABLE OF CONTENTS LIST APPLICANT: AIRTECH INFORMATION & COMMUNICATION CO., LTD. FCC ID: ONKFR-464 TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CONTD. & RF POWER OUTPUT PAGE 3......RF POWER OUTPUT CONTD. & MODULATION CHARACTERISTICS PAGE 4......OCCUPIED BANDWIDTH PAGE 5......SPURIOUS EMISSIONS AT ANTENNA TERMINALS AND FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 6......METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 7......FREQUENCY STABILITY PAGE 8......CERTIFICATION OF TECHNICAL DATA AND LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........POWER OF ATTORNEY LETTER EXHIBIT 2.........FCC ID LABEL SAMPLE EXHIBIT 3.........SKETCH OF FCC ID LABEL LOCATION EXHIBIT 4A........EXTERNAL FRONT VIEW PHOTOGRAPH EXHIBIT 4B........EXTERNAL FRONT VIEW PHOTOGRAPH EXHIBIT 4C-4D.....EXTERNAL SIDE VIEW PHOTOGRAPHS EXHIBIT 4E-4F.....INTERNAL CHASSIS VIEW PHOTOGRAPHS EXHIBIT 4G........INTERNAL COMPONENET SIDE PHOTOGRAPH EXHIBIT 4H........INTERNAL SOLDER SIDE PHOTOGRAPH EXHIBIT 5.........BLOCK DIAGRAM EXHIBIT 6.........PARTS LIST - 3 PAGES EXHIBIT 7.........OUTPUT TRANSISTOR SPECIFICATIONS - 7 PAGES EXHIBIT 8.........SCHEMATIC EXHIBIT 9.........USER'S MANUAL - 7 PAGES EXHIBIT 10........AUDIO FREQUENCY RESPONSE GRAPH EXHIBIT 11A.......MODULATION LIMITING GRAPH - 300 Hz EXHIBIT 11B.......MODULATION LIMITING GRAPH - 1000 Hz EXHIBIT 11C.......MODULATION LIMITING GRAPH - 3000 Hz EXHIBIT 12........AUDIO LOW PASS FILTER GRAPH EXHIBIT 13........OCCUPIED BANDWIDTH CW PLOT EXHIBIT 14........OCCUPIED BANDWIDTH With DEVIATION PLOT APPLICANT: AIRTECH INFORMATION & COMMUNICATION CO., LTD. FCC ID: ONKFR-464 DATE: July 26, 1999 REPORT #: F:\CUS\A\AIR\air243a9\AIR243A9RPT.doc PAGE: TABLE OF CONTENTS GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.983 (a,b,c) AIRTECH INFORMATION & COMMUNICATION CO., LTD. will manufacture the FCCID: ONKFR-464 FAMILY RADIO SERVICES 14 CHANNEL TRANSCEIVER in quantity, for use under FCC RULES PART 95. 2.983 (d) TECHNICAL DESCRIPTION 2.983 (d) (1) Type of Emission: 9K6F3E 95.629 Bn=2M+2DK M = 3000 D = 1.8K Bn = 2(3.0)+2(1.8) = 9.60K Authorized Bandwidth 12.5KHz 2.983 (d) (2) Frequency Range: 1. 462.5625 8. 467.5625 95.627 2. 462.5875 9. 467.5875 3. 462.6125 10. 467.6125 4. 462.6375 11. 467.6375 5. 462.6625 12. 467.6625 6. 462.6875 13. 467.6875 7. 462.7125 14. 467.7125 MHz 2.983 (d) (3) Power Output shall not exceed 0.500Watts effective 95.637 radiated power. There can be no provisions for 95.647 increasing the power. 2.983 (d) (4) Maximum Output Power Rating: 500 milliWatts 95.637 effective radiated power. 95.645 The antenna is an intergral part to the unit, it cannot be removed without rendering the unit inoperative. In order to remove the antenna the case must unscrewed, then the PCB assemblies must be removed then the antenna can be removed. 2.983 (d) (5) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY Vce = 4.5 Volts DC Ice = 0.32A. Pin = 1.44 Watts APPLICANT: AIRTECH INFORMATION & COMMUNICATION CO., LTD. FCC ID: ONKFR-464 DATE: July 26, 1999 REPORT #: F:\CUS\A\AIR\air243a9\AIR243A9RPT.doc PAGE #: 1 2.983 (d) (6) Function of each electron tube or semiconductor device or other active circuit device: SEE EXHIBIT # 6 2.983(d) (7) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 8 of this report. The block diagrams are included as EXHIBIT 5 of this report. 2.983(d) (8) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 9. 2.983 (d) (9) Tune-up procedure. The tune-up procedure is included INCLUDED IN USER'S MANUAL. (10) Description of all circuitry and devices provided for determining and stabilizing frequency is given in EXHIBIT 9. The crystal specifications are included as PAGES NA. 2.983 (d)(11) Description of any circuits or devices employed for suppression of spurious radiation, for limit- ing modulation, and for limiting power will be INCLUDED IN USER'S MANUAL. (12) Digital modulation. This unit does not use digital modulation. 2.983(e) The data required by 2.985 through 2.997 is submit ted below. 2.985(a) RF power output. 95.637 RF power is measured by measuring the radiated power at 3 meters and then replacing the transmitter with a signal generator to determine the effective radiated power. The ERP shall not exceed 0.500 Watts. MEASURED POWER OUTPUT = 500 milliWatts ERP APPLICANT: AIRTECH INFORMATION & COMMUNICATION CO., LTD. FCC ID: ONKFR-464 DATE: July 26, 1999 REPORT #: F:\CUS\A\AIR\air243a9\AIR243A9RPT.doc PAGE #: 2 R.F. POWER OUTPUT HP TEST SET UP Spectrum Analyzer /-------\ /-----------------\ | | | | TRANSMITTER | | | | | UNDER TEST WITH | \--| | | INTERNAL ANTENNA| | | | \-----------------/ | | | | | \-------/ || |<-- 3.0 meters-->| /-------------\ | SIGNAL | DIPOLE | Tuned, Calibrated | GENERATOR | ANTENNA | Antenna which may | |----------/ be raised from 1 \-------------/ to 4 meters above ground and changed in polarization Equipment placed 1 meter above ground on a rotatable platform. 2.987(a)(b) Modulation characteristics: AUDIO FREQUENCY RESPONSE The audio frequency response was measured in ac- cordance with TIA/EIA Specification 603. The audio frequency response curve is shown on the next page. The audio signal was fed into a dummy microphone circuit and into the microphone connector. The input required to produce 30 percent modulation level was measured. 2.987(b) 1 Audio input versus modulation The audio input level needed for a particular per- percentage of modulation was measured in accor- dance with TIA/EIA Specification 603. The audio input curves versus modulation are on the following pages. Curves are provided for audio input frequen- cies of 300, 1000, and 3000 Hz. 95.635(b) Post Limiter Filter The filter must be between the modulation limiter and the modulated stage. At any frequency between 3 & 20KHz the filter must have an attenuation of 60log (f/3) greater tha the attenuation at 1KHz. see the proceeding page. APPLICAN…

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Airtech Info & Comm. Co. LTD. Model: FR-464 0 10 20 30 40 50 60 70 80 01000200030004000 Frequency rms mVolts audio response

Modulation Limiting Airtech FR-464 0 500 1000 1500 2000 00.050.10.150.20.250.30.35 rms Volts Deviation 300 Hz

Modulation Limiting Airtech FR-464 0 500 1000 1500 2000 00.020.040.060.080.1 rms Volts Deviation 1000 Hz

Modulation Limiting Airtech FR-464 0 200 400 600 800 1000 1200 1400 00.020.040.060.08 rms Volts Deviation 3000 Hz

Airtech Info & Comm. Co. LTD. Model: FR-464 0 10 20 30 40 50 60 70 80 90 100 100100010000 Frequency rms mVolts audio response

Airtech Info & Comm. Co. LTD. Model: FR-464 0 10 20 30 40 50 60 70 80 90 100 100100010000 Frequency rms mVolts audio response