CINSM-916Synthesized Wireless Microphone - Transmitter

DepartmentR&D CHIAYO ELECTRONICS Co.,Ltd Page 1/1 Date07.15.2002 SM-916SDX Adjustment Procedures Doc. No WriterS.C.TANG RevisionA 1. Remove battery cover: 2. Insert 1 pieces of 9 volt(aa) to battery terminals. 3. Slide power switch to “on” position while observing led (blink). 4. RF power output adjustment for SM-916SDX (1) please place SM-916SDX at 30 cm from Spectrum Analyzer Antenna and parallet to antenna. (2) Adjust “C414,C413, on the SM-916SDX PCB to obtain the power output level of less than 105dBuV. (3) Adjust “VC601“ on the SM-916SDX PCB to obtain the correct frequency ±6Khz. (4) Observe current meter and it should be less than 55mA. 5. SM-916SDX AF Adjustment (1) Connect a 1Khz and 150mv audio signal to Min jack pin 3-2 on the SM-916SDX pcb.Then adjust VR703 to max. (2) Connect a 1Khz and 150mv audio signal to GT jack pin 3-3 on the SM-916SDX PCB.then adjust VR901 to max. (3) Adjust VR701 Until the deviation is 40±2Khz. (4) Obserev MOD scope for an undistorted sin wave. 6. SM-916SDX TONE Adjustment (1)Adjust VR501 until the TONE level is 5Khz±1Khz.

APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc TABLE OF CONTENTS APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 TABLE OF CONTENTS LIST TEST REPORT CONTAINING: PAGE 1.........GENERAL INFORMATION & TECHNICAL DESCRIPTIONS PAGE 2.........TECHNICAL DESC. CONT. & RF POWER TEST PROCEDURE PAGE 3.........AUDIO FREQUENCY RESPONSE PLOT & MODULATION LIMITING PLOT – 300 Hz PAGE 4.........MODULATION LIMITING PLOT – 1000 Hz & 5000 Hz PAGE 5.........OCCUPIED BANDWIDTH PLOT PAGE 6.........OCCUPIED BANDWIDTH MEASUREMENT & RADIATED EMISSIONS TEST DATA PAGE 7.........METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 8.........FREQUENCY STABILITY TEST DATA PAGE 9-11......EQUIPMENT LIST EXHIBITS CONTAINING: EXHIBIT 1.......FCC ID LABEL SAMPLE & ID LABEL LOCATION EXHIBIT 2.......BLOCK DIAGRAM EXHIBIT 3.......SCHEMATICS EXHIBIT 4.......TUNING PROCEDURE EXHIBIT 5.......CIRCUIT DESCRIPTION EXHIBIT 6.......USER'S MANUAL EXHIBIT 7.......TEST SET UP PHOTOGRAPH EXHIBIT 8.......EXTERNAL FRONT PHOTOGRAPHS EXHIBIT 9.......INTERNAL PHOTOGRAPHS EXHIBIT 10......PARTS LIST APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 1 of 11 GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.1033(c)(1)(2) CHIAYO ELECTRONICS CO., LTD. will manufacture the CINSM-916 in quantity, for use under FCC RULES PART 74.801, LOW POWER AUXILIARY STATIONS. CHIAYO ELECTRONICS CO., LTD. 30, LANE 27, SEC. 4, JEN AI ROAD TAIPEI, TAIWAN R.O.C., 2.1033 TECHNICAL DESCRIPTION (c)(3) Instruction book. The instruction manual is included as Exhibit 6. (c)(4) Type of Emission 106K0F3E Bn = 2M + 2DK M = 3000 D = 50 kHz(Peak Deviation) K = 1 Bn = 2(3k) + 2(50k)(1) = 106k ALLOWED AUTHORIZED BANDWIDTH = 200kHz. 74.861(e)(5) (c)(5) Frequency Range: Part 74: 614-806 MHz (c)(6) Power Range and Controls: UNIT has no controls. (c)(7) Maximum Output Power Rating: .028 Watts (c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY 9.0V @ 0.040A (c)(9) Tune-up procedure. The tune-up procedure is given in Exhibit #4. (c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT # 3. The block diagram is included as EXHIBIT #2. APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 2 of 11 2.1033(c)11) Photo or Drawing of Label and sketch of location: See EXHIBIT # 1. 2.1033(c)12) Photos of Equipment: See EXHIBIT #'S 8-9. (c)(13) Description of all circuitry and devices provided for determining and stabilizing frequency. Description of any circuits or devices employed for suppression of spurious radiation, for limit- ing modulation, and for limiting power. This circuitry is described in Exhibit #5. Limiting Modulation: The transmitter audio circuitry is contained in IC101, IC102 and IC103. Limiting Power: There is no provision for limiting power. (13) Digital modulation. This unit does not use digital modulation. 2.1033(c)(14) The data required by 2.1046 through 2.1057 is sub- mitted below. 2.1046 RF power output. R.F. POWER OUTPUT TEST PROCEDURE Transmitter 50 ohm under test Watt Meter Audio Oscillator APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 3 of 11 2.1047(a)(b) Modulation characteristics: AUDIO FREQUENCY RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603. The audio frequency response curve is shown on the next page. Audio Frequency Response -40 -30 -20 -10 0 10 20 100100010000 Frequency Hz Attenuation dB MODULATION LIMITING PLOT – 300 Hz Modulation Limiting Chiayo Electronics Co. LTD. SM-916 0 10000 20000 30000 40000 50000 60000 -37-27-17-7 dBmV Deviation 300 Hz APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 4 of 11 MODULATION LIMITING PLOT – 1000 Hz Modulation Limiting Chiayo Electronics Co. LTD. SM-916 0 10000 20000 30000 40000 50000 -37-27-17-7 rms mVolts Deviation 1000 Hz MODULATION LIMITING PLOT – 5000 Hz Modulation Limiting Chiayo Electronics Co. LTD. SM-916 0 10000 20000 30000 40000 50000 60000 -37-32-27-22 rms mVolts Deviation 5000 Hz APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 5 of 11 AUDIO LOW PASS FILTER The audio low pass filter is not required in this unit. 2.1049(c) Occupied Bandwidth: Data in the plots show that all sidebands between 50 & 100% of the authorized bandwidth are attenuated by at least 25dB. From 100 to 250% of the authorized band- width, they are attenuated by at least 35dB. Beyond 250% of the authorized bandwidth, at least 43 + log(Po) dB. The plot shows the transmitter modulated with 15000 Hz(the highest modulation frequency), adjusted for 50% modulation plus 16 dB. The spectrum analyzer was set with the unmodulated carrier at the top of the screen. The test procedure diagram and occupied bandwidth plots follow. OCCUPIED BANDWIDTH PLOT APPLICANT: CHIAYO ELECTRONICS CO., LTD. FCC ID: CINSM-916 REPORT #: C\CHIAYOCIN\1284UT2\1284UT2TestReport.doc Page 6 of 11 Wireless Microphone transmitter: Test procedure diagram OCCUPIED BANDWIDTH MEASUREMENT Transmitter Coupler 50 ohm under test Resistive Load Audio Spectrum Oscillator Analyzer REQUIREMENT: PART 74: 200kHz EMISSION BANDWIDTH 2.1051 Spurious emissions at antenna terminals(conducted): Not Applicable no antenna connector. 2.1053(a)(b) Field strength of spurious emissions: NAME OF TEST: RADIATED SPURIOUS EMISSIONS REQUIREMENTS: Emissions must be 43 +10log(Po) dB below the mean power output of the transmitter. 43 + 10 log(0.028) = 27.47 dB TEST DATA: **The unit was scanned at three places in the band and the worst case scenario is presented. METHOD OF MEASUREMENT: The procedure used was TIA/EIA STANDARD 603 substitution method. The spectrum was scanned from 30 to at least the tenth harmonic of the fundamental usin…

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