PXEML-1804TX318MHz Wireless BS Detector TX

FCC ID: PXEML-1804TX MODEL NO.: ML-1804TX THIS DEVICE COMPLIES WITH PART 15 OF FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

APPLICANT: Sinoart LTD. FCC ID: PXEML-1804TX Circuit Description U1 the encoder it generate the stop and play encoded signal , that signal drive into the base of (Q1) it form a pulse modulation . The output of Q1 oscillator has the turning network consisting of L1 (PCB antenna), C3, C4, VC and antenna go to the output stage. Antenna, Ground, and Power Source The antenna is on the PCB trace. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 6 Volt primary storage cell.

TABLE OF CONTENTS APPLICANT: SINOART SYSTEMS LTD. FCC ID: PXEML-1804TX TEST REPORT CONTAINING: PAGE 1.............TEST EQUIPMENT LIST & TEST PROCEDURE PAGE 2.............TEST PROCEDURE CONTD. PAGE 3.............RADIATION INTERFERENCE TEST DATA PAGE 4.............CALCULATION OF DUTY CYCLE PAGE 5.............DUTY CYCLE PLOT – SHORT PULSE PAGE 6.............DUTY CYCLE PLOT – LONG PULSE PAGE 7.............DUTY CYCLE PLOT PAGE 8.............OCCUPIED BANDWIDTH PAGE 9.............OCCUPIED BANDWIDTH PLOT EXHIBIT ATTACHMENTS: EXHIBIT 1...........BLOCK DIAGRAM EXHIBIT 2...........SCHEMATIC EXHIBIT 3...........INSTRUCTION MANUAL EXHIBIT 4...........FCC ID LABEL SAMPLE EXHIBIT 5...........SKETCH OF FCC ID LABEL LOCATION EXHIBIT 6...........FRONT VIEW EXTERNAL PHOTO EXHIBIT 7...........REAR VIEW EXTERNAL PHOTO EXHIBIT 8...........COMPONENT SIDE INTERNAL PHOTO EXHIBIT 9...........COPPER SIDE INTERNAL PHOTO EXHIBIT 10..........TEST SET UP PHOTO EXHIBIT 11..........CIRCUIT DESCRIPTION APPLICANT: SINOART SYSTEMS LTD. FCC ID: PXEML-1804TX REPORT #: S\SINOART\974H1\974H1RPT.doc PAGE: TABLE OF CONTENTS LIST APPLICANT: SINOART SYSTEMS LTD. FCC ID: PXEML-1804TX TEST EQUIPMENT LIST 1. Spectrum Analyzer: HP 8566B-Opt 462, S/N 3138A07786, w/ preselector HP 85685A, S/N 3221A01400, Quasi-Peak Adapter HP 8565OA, S/N 3303A01690 & Preamplifier HP 8449B-OPT H02, S/N 3008A00372 2. Biconnical Antenna: Eaton Model 94455-1, S/N 1057 3. Biconnical Antenna: Electro-Metrics Model BIA-25, S/N 1171 4. Log-Periodic Antenna: Electro-Metrics Model EM-6950, S/N 632 5. Log-Periodic Antenna: Electro-Metrics Model LPA-30, S/N 409 6. Double-Ridged Horn Antenna: Electro-Metrics Model RGA-180, 1-18 GHz, S/N 2319 7. 18-26.3GHz Systron Donner Standard Gain Horn #DBE-520-20 8. Horn 40-60GHz: ATM Part #19-443-6R 9. Line Impedance Stabilization Network: Electro-Metrics Model ANS-25/2, S/N 2604 10. Temperature Chamber: Tenney Engineering Model TTRC, S/N 11717-7 11. Frequency Counter: HP Model 5385A, S/N 3242A07460 Cal 10/6/99 12. Peak Power Meter: HP Model 8900C, S/N 2131A00545 13. Open Area Test Site #1-3meters 14. Signal Generator: HP 8640B, S/N 2308A21464 15. Signal Generator: HP 8614A, S/N 2015A07428 16. Passive Loop Antenna: EMCO Model 6512, 9KHz to 30MHz, S/N 9706-1211 17. Dipole Antenna Kit: Electro-Metrics Model TDA-30/1-4, S/N 153 18. AC Voltmeter: HP Model 400FL, S/N 2213A14499 19. Digital Multimeter: Fluke Model 8012A, S/N 4810047 20. Digital Multimeter: Fluke Model 77, S/N 43850817 21. Oscilloscope: Tektronix Model 2230, S/N 300572 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 77ºF with a humidity of 54%. REPORT #: S\SINOART\974H1\974H1RPT.doc PAGE #: 1 TEST PROCEDURES CONTD. 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 ANSI STANDARD C63.4-1992 10.1.7 MEASUREMENT PROCEDURES: The UUT was placed on a table 80 cm high and with dimensions of 1m by 1.5m. The UUT was placed in the center of the table. The table used for radiat- ed measurements is capable of continuous rotation. The spectrum was scanned from 30 MHz to 10th harmonic of the fundamental. Peak readings were taken in three (3) orthogonal planes and the high- est readings were converted to average readings based on the duration of "ON" time. Measurements were made by TIMCO ENGINEERING INC. at the registered open field test site located at 849 N.W. State Road 45, Newberry, Fl 32669. 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. APPLICANT: SINOART SYSTEMS LTD. FCC ID: PXEML-1804TX REPORT #: S\SINOART\974H1\974H1RPT.doc PAGE #: 2 APPLICANT: SINOART SYSTEMS LTD. FCC ID: PXEML-1804TX NAME OF TEST: RADIATION INTERFERENCE RULES PART NO.: 15.231 REQUIREMENTS: Fundamental Field Strength Field Strength of Frequency of Fundamental Harmonics and Spurious MHz dBuV Emissions (dBuV/m @ 3m) 40.66 to 40.70 67.04 47.04 70 to 130 61.94 41.94 130 to 174 61.94 to 71.48 41.94 to 51.48 174 to 260 71.48 51.48 260 to 470 71.48 to 81.94 51.48 to 61.94 470 and above 81.94 61.94 THE LIMIT FOR AVERAGE FIELD STRENGTH dBuV/m FOR THE FUNDAMENTAL FREQUENCY= 75.89 dBuV/m. NO FUNDAMENTAL IS ALLOWED IN THE RESTRICTED BANDS. THE LIMIT FOR AVERAGE FIELD STRENGTH dBuV/m FOR THE HARMONICS AND SPURIOUS FREQUENCIES = 55.89 dBuV/m. SPURIOUS IN THE RESTRICTED BANDS MUST BE LESS THAN 54dBuV/m OR 15.209. TEST DATA: Emission Frequency MHz Meter Reading dBuv Ant. Polarity Coax Loss dB Correction Factor dB Duty Cycle Factor dB Field Strength dBuv/m Margin dB 319.50 67.3 H 2.32 15.05 10.25 74.42 1.47 639.00 34.5 H 3.52 19.27 10.25 47.04 8.85 958.50 32.1 V 2.88 23.24 10.25 47.97 7.91 1,278.00 28.7 V 2.24 26.33 10.25 47.02 8.87 1,597.50 ** 17.1 V 2.58 28.27 10.25 37.70 16.30 1,917.00 20.1 V 2.91 28.49 10.25 41.25 14.64 2,236.50 ** 12.1 V 3.19 28.75 10.25 33.79 20.21 2,556.00 9.2 V 3.44 29.18 10.25 31.57 24.31 ** - THESE EMISSIONS FALL WITHIN RESTRICTED BANDS. SAMPLE CALCULATION OF LIMIT @ 303 MHz: (470 - 260)Mhz = 210 MHz (12500 - 3750)uV/m = 8…

Text truncated - open the document above for the full version.