PHC1428Family Radio Transceiver

TABLE OF CONTENTS LIST APPLICANT: LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CONTINUED & RF POWER OUTPUT PAGE 3......MODULATION CHARACTERISTICS AND OCCUPIED BANDWIDTH PAGE 4......METHOD OF MEASURING OCCUPIED BANDWIDTH PAGE 5......FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 6......METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 7......FREQUENCY STABILITY PAGE 8......LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE EXHIBIT 2.........SKETCH OF FCC ID LABEL LOCATION EXHIBIT 3A........EXTERNAL PHOTO - FRONT VIEW EXHIBIT 3B........EXTERNAL PHOTO - TOP VIEW EXHIBIT 3C........EXTERNAL PHOTO - BOTTOM EXHIBIT 3D-3E.....EXTERNAL PHOTO - SIDE VIEW EXHIBIT 3F........EXTERNAL PHOTO - REAR VIEW EXHIBIT 3G........INTERNAL PHOTO - SOLDER SIDE EXHIBIT 3H........INTERNAL PHOTO - COMPONENT SIDE EXHIBIT 4.........BLOCK DIAGRAM EXHIBIT 5A-5B.....SCHEMATIC EXHIBIT 6A-6G.....USER'S MANUAL EXHIBIT 7A-7B.....CIRCUIT DESCRIPTION EXHIBIT 8.........AUDIO FREQUENCY RESPONSE GRAPH EXHIBIT 9A........MODULATION LIMITING PLOT - 300 Hz EXHIBIT 9B........MODULATION LIMITING PLOT - 1000 Hz EXHIBIT 9C........MODULATION LIMITING PLOT - 3000 Hz EXHIBIT 10........AUDIO LOW PASS FILTER GRAPH EXHIBIT 11A.......OCCUPIED BANDWIDTH CW PLOT EXHIBIT 11B.......OCCUPIED BANDWIDTH PLOT APPLICANT: LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 REPORT #: T:\CUS\L\LINKOMM\246ZK1\246zk1rpt.doc PAGE: TABLE OF CONTENTS GENERAL_INFORMATION_REQUIRED FOR_TYPE_ACCEPTANCE 2.1033(c)(1)(2) LINKOMM COMMUNICATION NETWORK will manufacture the FCCID: PHC1428 FAMILY RADIO SERVICES 14 CHANNEL TRANSCEIVER in quantity, for use under FCC RULES PART 95. The UUT is a PTT Radio with a maximum duty cycle of 50%. LINKOMM COMMUNICATION NETWORK SAMYOUNG B/D, 48-8 SHINWOUL, 3-DONG, YANCHEON-GU SEOUL, KOREA 2.1033 (c) TECHNICAL_DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 6A-6J. 2.1033(c) (4) Type of Emission: 10K6F3E 95.631 Bn = 2M + 2DK M = 3000 D = 2.0K Bn = 2(3.0)+2(2.3) = 10.6K Authorized Bandwidth 12.5KHz 2.1033(c)(5) 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 2.1033(c)(6)(7) Power Output shall not exceed 0.500Watts effective 95.639 radiated power. There can be no provisions for 95.649 increasing the power or varing the power. The Maximum Output Power Rating: 300 milliWatts effective radiated power. 95.647 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. 2.1033(c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY Vce = 6.0 Volts DC Ice = 0.25A. Pin = 1.5 Watts REPORT #: T:\CUS\L\LINKOMM\246ZK1\246zk1rpt.doc PAGE #: 1 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included in the IN USER'S MANUAL. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 5 of this report. The block diagram is included as EXHIBIT 4 of this report. 2.1033(c)(11) A photograph or a drawing of the equipment identifica tion label is included as exhibit No. 2. 2.1033(c)(12) Photographs(8"X10") of the equipment of sufficient clarity to reveal equipment construction and layout, including meters, labels for controls, including any view under shields - See EXHIBIT 3A-3H. 2.1033(c)(13) Digital modulation is not allowed. 2.1033(c)(14) The data required by 2.1046 through 2.1057 is submitted below. 2.1046(a) RF_power_output. 95.639 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 = 300 milliWatts ERP 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 80cm above ground on a rotatable platform. REPORT #: T:\CUS\L\LINKOMM\246ZK1\246zk1rpt.doc PAGE #: 2 2.1047(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 in exhibit 8. 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. 2.1047(b) 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 shown in exhibits 9A - 9C. Curves are provided for audio input frequen cies of 300, 1000, and 3000 Hz. 95.637(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 that the attenuation at 1KHz. See the plot; exhibit 10. 2.989(c) EMISSION BANDWIDTH: 95.633(c) Data in the plots shows that the sidebands from greater than 50% to 100% of the authorized bandwidth must be attenuated by at least 25dB and from 100 to 250% the sidebands must be attenuated by at least 35dB. Beyond 250% the sidebands must be attenuated by at least 43+log10(TP). The transmitter was modulated with 2500 Hz, adjusted for 50% modulation plus 16 dB. The spectrum analyzer was set with the unmodulated carri…

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Linkomm Comm. PHC1428 0 10 20 30 40 50 60 100100010000 Freque ncy rms mVolts audio response LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 JOB #: 246ZK1 EXHIBIT #: 8

Modulation Limiting Linkomm Comm. PHC1428 0 500 1000 1500 2000 2500 0 1020304050 rms mVolts Deviation 300 Hz LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 JOB #: 246ZK1 EXHIBIT #: 9A

Modulation Limiting Linkomm Comm. PHC1428 0 500 1000 1500 2000 2500 05101520 rms mVolts Deviation 1000 Hz LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 JOB #: 246ZK1 EXHIBIT #: 9B

Modulation Limiting Linkomm Comm. PHC1428 0 200 400 600 800 1000 1200 0510152025 rms mVolts Deviation 3000 Hz LINKOMM COMMUNICATION NETWORK FCC ID: PHC1428 JOB #: 246ZK1 EXHIBIT #: 9C