BZ6SEA157VHF Marine Radiotelephone/DSC Controller

April 5, 2000 FIRST DRAFT 4/10/2000 1st REV SEA INC OF DELAWARE PRELIMINARY MAINTENANCE MANUAL VHF FM RADIOTELEPHONE/DSC CONTROLLER MODEL SEA 157 (c) Copyright 2000 SEA, Inc. All rights reserved. SEA, Inc. 7030 220th St. S.W. Mountlake Terrace, Washington 98043 (425) 771-2182 FAX: (425) 771-2650 **IMPORTANT** NOTICE TO INSTALLERS ------------------------------------------------------------------ NOTE: The safe compass distance for this equipment (As defined in Paragraph 29 of IEC Publication 92-101, Third Edition): SEA 157 VHF FM TRANSCEIVER/DSC CONTROLLER = 2.0 meters ------------------------------------------------------------------ TABLE OF CONTENTS PAGE 1. INTRODUCTION............................................1-1 2. SEA 157 SPECIFICATIONS..................................2-1 2.1 General............................................2-1 2.2 Transmitter........................................2-1 2.3 Receiver...........................................2-2 2.4 Mechanical.........................................2-3 2.5 DSC controller.....................................2-4 3. OPERATING THE SEA157....................................3-1 3.1 Front panel controls...............................3-1 3.2 Display............................................3-1 3.3 Push to talk.......................................3-1 3.4 Radiotelephone operating system functions..........3-2 3.5 Digital selective calling operating system.........3-6 3.6 Receiving a call...................................3-8 3.7 Inputting position data and time...................3-8 3.8 Programming the DSC ID (MMSI)......................3-9 3.9 Programming the DSC Address Book...................3-9 3.10 Using test, calibration and diagnostic utilities...3-10 3.11 Master USA frequency list..........................3-11 3.12 International Channel list.........................3-12 3.13 Weather Channel list...............................3-12 4. INSTALLATION............................................4-1 4.1 Preliminary check..................................4-1 4.2 Shelf or overhead mounting.........................4-1 4.3 Bulkhead mounting..................................4-1 4.4 Power supply wiring................................4-1 4.5 Antenna wiring.....................................4-1 4.6 External speaker wiring............................4-2 4-7 NMEA 0183 input wiring.............................4-2 5. THEORY OF OPERATION.....................................5-1 5.1 Frequency synthesizer..............................5-1 5.2 Modulation circuit.................................5-2 5.3 Receiver circuits..................................5-2 5.4 Transmit amplifiers................................5-3 5.5 Antenna interface circuits.........................5-4 5.6 Automatic RF power control and TX logic............5-4 5.7 TX Logic detector..................................5-5 5.8 Power and Audio circuits...........................5-5 5.9 Microcomputer circuitry............................5-5 5.10 Keypad/keypad lighting.............................5-6 5.11 Display/display lighting...........................5-6 6. MAINTENANCE.............................................6-1 6.1 General............................................6-1 6.2 Recommended test equipment.........................6-1 6.3 Basic performance tests............................6-2 6.4 Transmitter alignment..............................6-4 6.5 Receiver alignment.................................6-5 7. SCHEMATICS..............................................7-1 LIST OF FIGURES FIG. ___________________DESCRIPTION___________________ Page 2.1 Front view of SEA 157.........................2-5 2.2 Rear view of SEA 157..........................2-6 4.1 Outline Dimensions of SEA 157.................4-2 4.2 Flush Mount Kit Drill Template for SEA 157....4-5 6.1 Transmitter test setup........................6-10 6.2 Receiver test setup...........................6-11 7.1 Functional block diagram...................... 7.2.1 RF Mainboard schematic diagram, Sheet 1....... 7.2.2 RF Mainboard schematic diagram, Sheet 2....... 7.2.3 RF Mainboard schematic diagram, Sheet 3....... 7.2.3 RF Mainboard schematic diagram, Sheet 4....... 7.2.3 RF Mainboard schematic diagram, Sheet 5....... 7.3 VCO Circuit Board schematic diagram........... 7.4 Receiver Circuit Board schematic diagram...... 1 INTRODUCTION This SEA 157 Service Manual provides detailed technical information for use by installation and service technicians. General operating instructions and installation drill templates are provided in the SEA 157 Operator's Handbook (SEA P/N OPR-157) supplied with each SEA 157. SEA continually strives to improve its products so that we may better serve our customers. SEA reserves the right to make changes to SEA 157 specifications, hardware, software or documentation at any time without notice. SEA's Marine Service Department is always available to provide additional help with technical difficulties. Please call SEA's Service Department to obtain a Return Authorization Number (RA#) before shipping equipment to SEA. Service parts are available through SEA's Marine Sales/Service Departments. Please order parts using SEA part numbers found in Section 8. 1-1 2 SEA 157 SPECIFICATIONS: 2.1 GENERAL FREQUENCY RANGE: TX 155-159 MHz US TX 156.0-157.5 MHz RX 155-164 MHz FREQUENCY RESOLUTION: 25 KHz CHANNELS: All US, Canadian, Int'l plus 10 WX POWER REQUIREMENT: Voltage, 12 V +30, -10% NOTE: Basic radio Circuitry 13.6 volts nominal neg- operates at 12 volts. ative ground. CURRENT: (12 Volt operation) Max TX: 5.5 amps (25W) 1.0 amps (1W) RX (STBY) 0.4 amp RX (Max Audio 1 amp FUSES: (12 Volt operation) 7.5 amp, external line 2.2 TRANSMITTER EMISSION: 16K0G3E (Voice) 13K5G2B (DSC) POWER OUTPUT: 25W, 1W into 50 ohms SPURIOUS EMISSIONS: -80 dB or better SPURIOUS RADIATION: Complies with FCC 80.211(f) AUDIO HARMONIC DISTORTION: 10% max. (EIA) AUDIO FREQUENCY RESPONSE: +1,-3 dB of +6 dB/octave preemphasis 300-3000 Hz HUM AND…

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1/25W CLKTN RXAF KEYPAD +13V 1/25W Q5 Q13 PA DRIV Q9 Q10 450KHz U4 24C16 U5 TMS 320C5402 U3 TE28F400 U14 PCF 8576 LCD U6 LM5450 U17 TLV5628 L6 -N -R U10 MB15A01P VCO MODULE Q2Q4Q3 PLLCS MOSI SPICLK XTAL 1 21.850 Mhz U21 CLK U12U12 CLKTN TXAF RXAFO +13VSW SPKR AF MICAF RXAF PLLCS MOSI SPICLK ONKEY 3VTX +13VSW +13VSW - + Q3 Q2 Q1B Q1A Q7 Q8 +13VSW LEDS D5-D32 U1 MC3371D F3 21.4MHz F1,F2 Q2 U3 BPF Q1 +3VRX TXAF RECEIVER MODULE D33 +13TX D35 U16 SAV-6 LPF ANTENNA TX IN +13VSW SEA 157 FUNCTIONAL BLOCK DIAGRAM FIGURE 6.1

12 April, 2000 Federal Communications Commission Equipment Approval Services PO Box 358315 Pittsburgh, PA 15251-5315 Dear Sir or Madam, Enclosed is a certification submission for the SEA 157 VHF FM marine radiotelephone with DSC. In addition to the electronic form 731, the fee and voucher (sent separately), and this letter the following file attachments are included: FILEDESCRIPTION ta1labeldwg.pdfDrawing showing FCC ID label and its placement on rear panel ta2gwfstatement.pdfSigned statement of test supervisor (G. W. Forgey) ta2mmjstatement.pdfSigned statement of project engineer (Mark M. Johnson) concerning DSC compliance. ta3extphotos.pdfExternal photos (front and rear) of equipment ta4blkdiag.pdfFunctional block diagram of equipment ta5_1s157rx.pdfSchematic diagram of receiver module ta5_2s157main.pdfSchematic diagram of main board ta5_3s157vco.pdfSchematic diagram of VCO module ta6testrpt.pdfTest report containing general information, technical description of the equipment and a description of the procedures, setups, requirements, and results of all required technical tests. ta8man.pdfPreliminary user’s manual containing equipment specifications, operational instructions, theory of operation, and tuneup procedures. ta9intphotos.pdfInternal photos of equipment ta10bom.pdfParts list for the three printed circuit boards. I appreciate your attention to this certification request. Should you require further information regarding this application, please contact me at (425)-771-2182. For your greater convenience the SEA Inc. WATS line number is 1-800-426-1330. Sincerely, G. William Forgey Vice President, Engineering SEA, Inc. of Delaware FCC IDENTIFIER: BZ6SEA157

PAGE 10-2 FCC IDENTIFIER: BZ6SEA157 FIGURE 10.1 PAGE 10-3 FCC IDENTIFIER: BZ6SEA157 FIGURE 10.2

A UNIT OF DATAMARINE INTERNATIONAL, INC. MADE IN U.S.A. S/N: KJ00003 ® RED+13.6V INT SPKR NMEA + NMEA - -13.6V AF OUT ORN YEL GRN BLK BLU FCC ID: BZ6SEA157 FCC IDENTIFICATION LABEL SAMPLE SAMPLE EQUIPMENT LABEL FOR SEA 157 REAR PANEL DRAWING OF SEA 157 SHOWING LABEL LOCATION FCC IDENTIFIER: BZ6SEA157 PAGE A BLUAF OUT NMEA - NMEA + INT SPKR GRN YEL ORN FCC ID: BZ6SEA157 -13.6V +13.6V BLK RED

PAGE 10-4 FCC IDENTIFIER: BZ6SEA157 FIGURE 10.3 PAGE 10-5 FCC IDENTIFIER: BZ6SEA157 FIGURE 10.4

April 5, 2000 FIRST DRAFT 4/10/2000 1st REV SEA INC OF DELAWARE PRELIMINARY MAINTENANCE MANUAL VHF FM RADIOTELEPHONE/DSC CONTROLLER MODEL SEA 157 (c) Copyright 2000 SEA, Inc. All rights reserved. SEA, Inc. 7030 220th St. S.W. Mountlake Terrace, Washington 98043 (425) 771-2182 FAX: (425) 771-2650 **IMPORTANT** NOTICE TO INSTALLERS ------------------------------------------------------------------ NOTE: The safe compass distance for this equipment (As defined in Paragraph 29 of IEC Publication 92-101, Third Edition): SEA 157 VHF FM TRANSCEIVER/DSC CONTROLLER = 2.0 meters ------------------------------------------------------------------ TABLE OF CONTENTS PAGE 1. INTRODUCTION............................................1-1 2. SEA 157 SPECIFICATIONS..................................2-1 2.1 General............................................2-1 2.2 Transmitter........................................2-1 2.3 Receiver...........................................2-2 2.4 Mechanical.........................................2-3 2.5 DSC controller.....................................2-4 3. OPERATING THE SEA157....................................3-1 3.1 Front panel controls...............................3-1 3.2 Display............................................3-1 3.3 Push to talk.......................................3-1 3.4 Radiotelephone operating system functions..........3-2 3.5 Digital selective calling operating system.........3-6 3.6 Receiving a call...................................3-8 3.7 Inputting position data and time...................3-8 3.8 Programming the DSC ID (MMSI)......................3-9 3.9 Programming the DSC Address Book...................3-9 3.10 Using test, calibration and diagnostic utilities...3-10 3.11 Master USA frequency list..........................3-11 3.12 International Channel list.........................3-12 3.13 Weather Channel list...............................3-12 4. INSTALLATION............................................4-1 4.1 Preliminary check..................................4-1 4.2 Shelf or overhead mounting.........................4-1 4.3 Bulkhead mounting..................................4-1 4.4 Power supply wiring................................4-1 4.5 Antenna wiring.....................................4-1 4.6 External speaker wiring............................4-2 4-7 NMEA 0183 input wiring.............................4-2 5. THEORY OF OPERATION.....................................5-1 5.1 Frequency synthesizer..............................5-1 5.2 Modulation circuit.................................5-2 5.3 Receiver circuits..................................5-2 5.4 Transmit amplifiers................................5-3 5.5 Antenna interface circuits.........................5-4 5.6 Automatic RF power control and TX logic............5-4 5.7 TX Logic detector..................................5-5 5.8 Power and Audio circuits...........................5-5 5.9 Microcomputer circuitry............................5-5 5.10 Keypad/keypad lighting.............................5-6 5.11 Display/display lighting...........................5-6 6. MAINTENANCE.............................................6-1 6.1 General............................................6-1 6.2 Recommended test equipment.........................6-1 6.3 Basic performance tests............................6-2 6.4 Transmitter alignment..............................6-4 6.5 Receiver alignment.................................6-5 7. SCHEMATICS..............................................7-1 LIST OF FIGURES FIG. ___________________DESCRIPTION___________________ Page 2.1 Front view of SEA 157.........................2-5 2.2 Rear view of SEA 157..........................2-6 4.1 Outline Dimensions of SEA 157.................4-2 4.2 Flush Mount Kit Drill Template for SEA 157....4-5 6.1 Transmitter test setup........................6-10 6.2 Receiver test setup...........................6-11 7.1 Functional block diagram...................... 7.2.1 RF Mainboard schematic diagram, Sheet 1....... 7.2.2 RF Mainboard schematic diagram, Sheet 2....... 7.2.3 RF Mainboard schematic diagram, Sheet 3....... 7.2.3 RF Mainboard schematic diagram, Sheet 4....... 7.2.3 RF Mainboard schematic diagram, Sheet 5....... 7.3 VCO Circuit Board schematic diagram........... 7.4 Receiver Circuit Board schematic diagram...... 1 INTRODUCTION This SEA 157 Service Manual provides detailed technical information for use by installation and service technicians. General operating instructions and installation drill templates are provided in the SEA 157 Operator's Handbook (SEA P/N OPR-157) supplied with each SEA 157. SEA continually strives to improve its products so that we may better serve our customers. SEA reserves the right to make changes to SEA 157 specifications, hardware, software or documentation at any time without notice. SEA's Marine Service Department is always available to provide additional help with technical difficulties. Please call SEA's Service Department to obtain a Return Authorization Number (RA#) before shipping equipment to SEA. Service parts are available through SEA's Marine Sales/Service Departments. Please order parts using SEA part numbers found in Section 8. 1-1 2 SEA 157 SPECIFICATIONS: 2.1 GENERAL FREQUENCY RANGE: TX 155-159 MHz US TX 156.0-157.5 MHz RX 155-164 MHz FREQUENCY RESOLUTION: 25 KHz CHANNELS: All US, Canadian, Int'l plus 10 WX POWER REQUIREMENT: Voltage, 12 V +30, -10% NOTE: Basic radio Circuitry 13.6 volts nominal neg- operates at 12 volts. ative ground. CURRENT: (12 Volt operation) Max TX: 5.5 amps (25W) 1.0 amps (1W) RX (STBY) 0.4 amp RX (Max Audio 1 amp FUSES: (12 Volt operation) 7.5 amp, external line 2.2 TRANSMITTER EMISSION: 16K0G3E (Voice) 13K5G2B (DSC) POWER OUTPUT: 25W, 1W into 50 ohms SPURIOUS EMISSIONS: -80 dB or better SPURIOUS RADIATION: Complies with FCC 80.211(f) AUDIO HARMONIC DISTORTION: 10% max. (EIA) AUDIO FREQUENCY RESPONSE: +1,-3 dB of +6 dB/octave preemphasis 300-3000 Hz HUM AND…

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BILL OF MATERIALS FOR ASY-0157-01 (MAIN BOARD) Part #QuantityValueAttributesDesignations CAP-0603-10346.01uFSM/C/0603C1,C16,C17,C20,C21,C23,C29,C30,C31,C32,C34,C37,C58,C59,C60, C62,C63,C64,C67,C74,C75,C79,C80,C81,C85,C86,C88,C89,C90,C91, C93,C94,C96,C97,C98,C102,C104,C105,C106,C108,C110,C111,C116, C120,C121,C122 CAP-0805-10416.1uFSM/C/0805C2,C14,C15,C18,C19,C22,C27,C28,C57,C69,C70,C83,C112,C114, C128,C130 CAP-0603-470147pFSM/C/0603C3 CAP-0806-180218pFSM/C/0805C4,C11 CAP-0806-680168pFSM/C/0805C5 CAP-0806-220522pFSM/C/0805C6,C7,C8,C92,C126 CAP-0806-270327pFSM/C/0805C9,C10,C127 CAP-1013-006810uF10VSM/CT/3528PNC12,C13,C25,C26,C71,C76,C82,C95, CAP-0603-10123100pFSM/C/0603C24,C35,C36,C38,C39,C40,C41,C42,C43,C44,C45,C48,C49,C50,C51, C52,C53,C78,C99,C100,C101,C113,C133 CAP-0603-10212.001uFSM/C/0603C46,C47,C55,C56,C68,C72,C77,C107,C117,C118,C124,C125, CAP-0037-0103470uF25VCY400D200H34C61,C65,C66 CAP-1014-476347uF25VSM/CT/7343PNC73,C109,C115 CAP-0603-270127pFSM/C/0603C84 CAP-0603-220222pFSM/C/0603C87,C132 Not Install1FSSM/C/0603C103 CAP-0603-0R51.5pFSM/C/0603C119 CAP-0805-200120pFSM/C/0805C123 SEM-1003-0012BAV74SOT-23D1,D36 SEM-1012-0041MBRS360D0214AB21D2 SEM-1003-0041MMBD7000SOT-23D3 SEM-1006-0011MMBV209SOT-23D4 SEM-1009-00328LED1SIP2D5,D6,D7,D8,D9,D10,D11,D12,D13,D14,D15,D16,D17,D18,D19,D20, D21,D22,D23,D24,D25,D26,D27,D28,D29,D30,D31,D32 SEM-1004-0022UPP9401SMBD33,D35 SEM-1005-0041CMPD6263SSOT-23D34 IND-2712-433543nHSM/L/2712L1,L2,L3,L4,L8 IND-1210-3342.33uHSM/L/1210L5,L6 IND-1210-33523.3uHSM/L/1210L7,L9 SEM-1051-0031MMDF2P03HDSMD8AQ1 BILL OF MATERIALS FOR ASY-0157-01 (MAIN BOARD) continued Part #QuantityValueAttributesDesignations SEM-1051-00132N7002SOT-23Q2,Q3,Q4 SEM-1043-0013MMBT2222A/NSSOT-23Q5,Q7,Q8 SEM-1045-0102BFG135SOT-223Q9,Q10 SEM-1052-0031MTD2955VDPAKQ13 RES-0603-2216220SM/R/0603R1,R17,R53,R57,R105,R108, RES-1206-04794.7SM/R/1206R2,R5,R6,R54,R74,R103,R106,R109,R110, RES-1206-10241kSM/R/1206R3,R122,R123,R124 RES-1206-1016100SM/R/1206R4,R7,R71,R83,R113,R114 RES-0603-102421KSM/R/0603R8,R10,R12,R13,R14,R15,R16,R18,R19,R20,R21,R22,R23,R24,R25, R26,R27,R28,R29,R30,R31,R32,R34,R35,R39,R47,R48,R58,R60,R61, R65,R68,R69,R70,R76,R85,R87,R89,R91,R93,R95,R97 RES-0603-4731347KSM/R/0603R9,R36,R37,R38,R40,R41,R50,R67,R79,R80,R81,R82,R116, RES-0603-1031910KSM/R/0603R42,R44,R45,R46,R49,R51,R52,R55,R56,R63,R66,R77,R78,R98,R111, R118,R119,R120,R125 RES-0805-01211.2SM/R/0805R59 RES-0603-22222.2KSM/R/0603R64,R104 THE-001-2221PTC 2.2KLEADED PTCR73 RES-1206-6817680SM/R/1206R84,R86,R88,R90,R92,R94,R96, RES-0603-56215.6KSM/R/0603R107 RES-0603-33213.3KSM/R/0603R121 SEM-1033-0042NC7WZU04SC70-6U1,U12 SEM-1024-0281LM1117-3.3D-PAKU2 SEM-1025-0121TE28F400TSOP48U3 SEM-1026-005124C16SMD8AU4 SEM-1026-0241TMS320C5402PGEQ.50M_144AU5 SEM-1029-0081LM4540TQFP.5M/48U6 SEM-1024-0161TPS76318SOT23-5U7 SEM-1179-0011PC353TSMD6U8 SEM-1024-002178M05DPAKU9 SEM-1020-0111MB15A01PWTSSOP20U10 SEM-0153-0031TDA-2002TO-220(5LEAD)U11 SEM-????1TPS3823-3.3SOT23-5U13 SEM-1170-0021PCF8576CHQ.50M_64AU14 SEM-1029-0121TLV0832CDWSOIC/8U15 BILL OF MATERIALS FOR ASY-0157-01 (MAIN BOARD) continued Part #QuantityValueAttributesDesignations SEM-1029-0101TLV5628CDWSOICU17 BILL OF MATERIALS FOR ASY-0157-02 (RX BOARD) Part #QuantityValueAttributesDesignations CAP-0603-06866.8pfSM/C/0603C2,C5,C12,C15,C16,C17 CAP-0603-0R520.5pFSM/C/0603C3,C4 CAP-0603-100110pFSM/C/0603C6 CAP-0603-220422pFSM/C/0603C7,C9,C19,C20 CAP-0603-10310.01uFSM/C/0603C8,C9,C13,C14,C24,C25,C26,C27,C28,C29 CAP-0805-1043.1uFSM/C/0805C10,C21,C22 FIL-0008-002121.4MHZUM1 FILTER PAIRF1,F2 FIL-0004-0081450KHZCWFS450EF3 IND-0005-046328nHCOILCRAFT7MML1,L2,L3 IND-1210-33523.3uHSM/L/1210L4,L5,L7,L8 TRA-0014-0021455XFMR7MMXFMRL6 SEM-1055-0013J310SOT-23Q1,Q2,Q3 RES-0603-360436SM/R/0603R1,R2,R12,R14 RES-0603-22242.2KSM/R/0603R3,R6,R7,R9 RES-0603-1514150SM/R/0603R4,R8,R10,R11 RES-0603-223222KSM/R/0603R5,R13 RES-0603-5611560SM/R/0603R15 SEM-1027-0121SMD16AU1 SEM-1024-0181LM3490-55V REGULATORU2 MIX-1001-0021ADE-1SMD MIXERU3 PCB-0157-0021157 RX PCB BILL OF MATERIALS FOR ASY-0157-03 (VCO BOARD) Part #QuantityValueAttributesDesignations CAP-1016-22532.2uF25VSM/CT/3528PNC1,C2,C3 CAP-1017-2252.22uf /35vSMT .22uf TANTC4, C5 CAP-0603-330333pFSM/C/0603C6,C18,C21 CAP-0805-1028.001uFSM/C/0805C7,C12,C16,C17,C19,C22,C24,C25 CAP-0603-1033.01uFSM/C/0603C8,C13,C15 CAP-0804-1042.1uFSM/C/0805C9,C17 CAP-0603-01031pFSM/C/0603C10,C11,C20 CAP-0037-014247uF10VSM/CT/7343PNC14,C16 CAP-0603-100110uF16VSM/CT/3528PNC21 SEM-1005-0041CMPD6263SSOT-23D1 SEM-1002-0011MMBV3401SOT-23D2 SEM-1006-0013MMBV109LSOT-23D3,D4,D5 IND-1210-3343.1uHSM/L/1210L1,L4,L7 IND-1210-33523.3uHSM/L/1210L2,L4 ASY-157-0051SEA157 L5TOROIDL5 ASY-157-0061SEA157 L6TOROIDL6 SEM-1055-0011J310SOT-23Q1 SEM-1051-00112N7002SOT-23Q2 SEM-1045-0071BFS17SOT-23Q3 SEM-1045-0011MMBT5179SOT-23Q4 SEM-10??-???12N2222SOT-23Q5 RES-0805-101247SM/R/0805R5,R20 RES-0603-10251KSM/R/0603R3,R4,R7,R8,R13 RES-0603-223622KSM/R/0603R6,R9,R10,R15,R18,R19 RES-0603-100310SM/R/0805R1,R2,R12 RES-0603-3311560SM/R/0805R15 RES-0805-220122SM/R/0805R14 RES-1206-2211220SM/R/1206R17 SEM-1024-005178L08SMD8U1 PCB-0157-0031SEA157 VCO PCB

April 5, 2000 FIRST DRAFT 4/10/2000 1st REV SEA INC OF DELAWARE PRELIMINARY MAINTENANCE MANUAL VHF FM RADIOTELEPHONE/DSC CONTROLLER MODEL SEA 157 (c) Copyright 2000 SEA, Inc. All rights reserved. SEA, Inc. 7030 220th St. S.W. Mountlake Terrace, Washington 98043 (425) 771-2182 FAX: (425) 771-2650 **IMPORTANT** NOTICE TO INSTALLERS ------------------------------------------------------------------ NOTE: The safe compass distance for this equipment (As defined in Paragraph 29 of IEC Publication 92-101, Third Edition): SEA 157 VHF FM TRANSCEIVER/DSC CONTROLLER = 2.0 meters ------------------------------------------------------------------ TABLE OF CONTENTS PAGE 1. INTRODUCTION............................................1-1 2. SEA 157 SPECIFICATIONS..................................2-1 2.1 General............................................2-1 2.2 Transmitter........................................2-1 2.3 Receiver...........................................2-2 2.4 Mechanical.........................................2-3 2.5 DSC controller.....................................2-4 3. OPERATING THE SEA157....................................3-1 3.1 Front panel controls...............................3-1 3.2 Display............................................3-1 3.3 Push to talk.......................................3-1 3.4 Radiotelephone operating system functions..........3-2 3.5 Digital selective calling operating system.........3-6 3.6 Receiving a call...................................3-8 3.7 Inputting position data and time...................3-8 3.8 Programming the DSC ID (MMSI)......................3-9 3.9 Programming the DSC Address Book...................3-9 3.10 Using test, calibration and diagnostic utilities...3-10 3.11 Master USA frequency list..........................3-11 3.12 International Channel list.........................3-12 3.13 Weather Channel list...............................3-12 4. INSTALLATION............................................4-1 4.1 Preliminary check..................................4-1 4.2 Shelf or overhead mounting.........................4-1 4.3 Bulkhead mounting..................................4-1 4.4 Power supply wiring................................4-1 4.5 Antenna wiring.....................................4-1 4.6 External speaker wiring............................4-2 4-7 NMEA 0183 input wiring.............................4-2 5. THEORY OF OPERATION.....................................5-1 5.1 Frequency synthesizer..............................5-1 5.2 Modulation circuit.................................5-2 5.3 Receiver circuits..................................5-2 5.4 Transmit amplifiers................................5-3 5.5 Antenna interface circuits.........................5-4 5.6 Automatic RF power control and TX logic............5-4 5.7 TX Logic detector..................................5-5 5.8 Power and Audio circuits...........................5-5 5.9 Microcomputer circuitry............................5-5 5.10 Keypad/keypad lighting.............................5-6 5.11 Display/display lighting...........................5-6 6. MAINTENANCE.............................................6-1 6.1 General............................................6-1 6.2 Recommended test equipment.........................6-1 6.3 Basic performance tests............................6-2 6.4 Transmitter alignment..............................6-4 6.5 Receiver alignment.................................6-5 7. SCHEMATICS..............................................7-1 LIST OF FIGURES FIG. ___________________DESCRIPTION___________________ Page 2.1 Front view of SEA 157.........................2-5 2.2 Rear view of SEA 157..........................2-6 4.1 Outline Dimensions of SEA 157.................4-2 4.2 Flush Mount Kit Drill Template for SEA 157....4-5 6.1 Transmitter test setup........................6-10 6.2 Receiver test setup...........................6-11 7.1 Functional block diagram...................... 7.2.1 RF Mainboard schematic diagram, Sheet 1....... 7.2.2 RF Mainboard schematic diagram, Sheet 2....... 7.2.3 RF Mainboard schematic diagram, Sheet 3....... 7.2.3 RF Mainboard schematic diagram, Sheet 4....... 7.2.3 RF Mainboard schematic diagram, Sheet 5....... 7.3 VCO Circuit Board schematic diagram........... 7.4 Receiver Circuit Board schematic diagram...... 1 INTRODUCTION This SEA 157 Service Manual provides detailed technical information for use by installation and service technicians. General operating instructions and installation drill templates are provided in the SEA 157 Operator's Handbook (SEA P/N OPR-157) supplied with each SEA 157. SEA continually strives to improve its products so that we may better serve our customers. SEA reserves the right to make changes to SEA 157 specifications, hardware, software or documentation at any time without notice. SEA's Marine Service Department is always available to provide additional help with technical difficulties. Please call SEA's Service Department to obtain a Return Authorization Number (RA#) before shipping equipment to SEA. Service parts are available through SEA's Marine Sales/Service Departments. Please order parts using SEA part numbers found in Section 8. 1-1 2 SEA 157 SPECIFICATIONS: 2.1 GENERAL FREQUENCY RANGE: TX 155-159 MHz US TX 156.0-157.5 MHz RX 155-164 MHz FREQUENCY RESOLUTION: 25 KHz CHANNELS: All US, Canadian, Int'l plus 10 WX POWER REQUIREMENT: Voltage, 12 V +30, -10% NOTE: Basic radio Circuitry 13.6 volts nominal neg- operates at 12 volts. ative ground. CURRENT: (12 Volt operation) Max TX: 5.5 amps (25W) 1.0 amps (1W) RX (STBY) 0.4 amp RX (Max Audio 1 amp FUSES: (12 Volt operation) 7.5 amp, external line 2.2 TRANSMITTER EMISSION: 16K0G3E (Voice) 13K5G2B (DSC) POWER OUTPUT: 25W, 1W into 50 ohms SPURIOUS EMISSIONS: -80 dB or better SPURIOUS RADIATION: Complies with FCC 80.211(f) AUDIO HARMONIC DISTORTION: 10% max. (EIA) AUDIO FREQUENCY RESPONSE: +1,-3 dB of +6 dB/octave preemphasis 300-3000 Hz HUM AND…

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SEA, Inc. of Delaware APPLICATION FOR CERTIFICATION MODEL SEA 157 VHF TRANSCEIVER AND DSC CONTROLLER CONTAINS: LIST OF EXHIBITS, EXHIBIT A AND EXHIBITS 1 THROUGH 13 APRIL 10, 2000 FCC IDENTIFIER: BZ6SEA157 LIST OF EXHIBITS APPLICABLE EXHIBIT RULES NUMBER TITLE PAGE 2.1033(c)(11) A IDENTIFICATION LABEL DETAILS A 1 INTRODUCTION 2.1033(c)(1) NAME OF APPLICANT 1-2 2.1033(c)(2) IDENTIFICATION OF EQUIPMENT 1-2 2.1033(c)(3) INSTALLATION AND OPERATING 1-2 INSTRUCTIONS 2 TECHNICAL DESCRIPTION 2-1 2.1033(c)(4) TYPES OF EMISSIONS 2-1 2.1033(c)(5) FREQUENCY RANGE 2-1 2.1033(c)(6) RANGE OF OPERATING POWER 2-1 2.1033(c)(7) MAXIMUM POWER RATING 2-1 2.1033(c)(8) DC INPUT POWER TO RF AMPLIFIER 2-1 2.1033(c)(9) TUNE UP PROCEDURE 2-1 2.1033(c)(10) SCHEMATIC DIAGRAMS WITH 2-3 DESCRIPTION OF ALL CIRCUITRY FOR DETERMINING AND STABILIZING FREQUENCY, SUPPRESSING SPURIOUS RADIATION, LIMITING MODULATION AND LIMITING POWER 3 INTRODUCTION TO MEASUREMENTS 3-1 2.947, 2.1041 MEASUREMENT PROCEDURES 3-1 2.911 STATEMENT OF TEST SUPERVISOR 3-2 2.948(d) TEST EQUIPMENT LIST 3-3 2.1046 4 RF POWER OUTPUT 4-1 2.1047 5 MODULATION CHARACTERISTICS 5-1 2.1049 6 OCCUPIED BANDWIDTH 6-1 2.1051 7 SPURIOUS EMISSIONS 7-1 2.1053 8 SPURIOUS RADIATION 8-1 2.1055 9 FREQUENCY STABILITY 9-1 2.1033(c)(12) 10 EQUIPMENT PHOTOGRAPHS 10-1 80.874 11 RECEIVER SENSITIVITY DATA 11-1 FCC IDENTIFIER: BZ6SEA175 LIST OF EXHIBITS - CONTINUED APPLICABLE EXHIBIT RULES NUMBER TITLE PAGE 80.203(n), 12 DECLARATION OF COMPLIANCE 12-1 80.225 (DSC) 2.1033(c)(3) 13 INSTRUCTION MANUAL ENC. FCC IDENTIFIER: BZ6SEA157 FCC IDENTIFICATION LABEL SAMPLE SEE SEPARATE ATTACHMENT with SAMPLE EQUIPMENT LABEL FOR SEA 157 REAR PANEL DRAWING OF SEA 157 SHOWING LABEL LOCATION FCC IDENTIFIER: BZ6SEA157 LIST OF FIGURES APPLICABLE FIGURE RULESDESCRIPTIONPAGE 4.1 2.1046 TEST SETUP, RF POWER OUTPUT 4-3 5.1 2.1047(a)(b) TEST SETUP, MODULATION CHAR- ACTERISTICS, MODULATION FRE- QUENCY RESPONSE AND MODULATION LIMITING 5-4 5.2 2.1047(a)(b) MODULATION CHARACTERISTICS, LOW AUDIO DRIVE 5-5 5.3 2.1047(a)(b) MODULATION CHARACTERISTICS, MEDIUM AUDIO DRIVE 5-6 5.4 2.1047(a)(b) MODULATION CHARACTERISTICS, HIGH AUDIO DRIVE 5-7 5.5 2.1047(a)(b) MODULATION CHARACTERISTICS, 500 HERTZ. 5-8 5.6 2.1047(a)(b) MODULATION CHARACTERISTICS, 1000 HERTZ 5-9 5.7 2.1047(a)(b) MODULATION CHARACTERISTICS, 2500 HERTZ 5-10 5.8 2.1047(a) TEST SETUP, AUDIO LOWPASS FILTER 5-11 5.9 2.1047(a) FREQUENCY RESPONSE OF AUDIO LOW PASS FILTER 5-12 6.1 2.1049(c)(1) TEST SETUP, OCCUPIED BANDWIDTH 6-2 6.2 2.1049(c)(1) OCCUPIED BANDWIDTH, 25W, 156.050 MHz 6-3 6.3 2.1049(c)(1) OCCUPIED BANDWIDTH, 25W, 157.425 MHz 6-4 6.4 2.1049(c)(1) OCCUPIED BANDWIDTH, 1W, 156.050 MHz 6-5 6.5 2.1049(c)(1) OCCUPIED BANDWIDTH, 1W, 157.425 MHz 6-6 6.6 2.1049(c)(1) OCCUPIED BANDWIDTH, 1W, 156.525 MHz, DSC DOT PATTERN 6-8 6.7 2.1049(c)(1) OCCUPIED BANDWIDTH, 25W, 156.050 MHz, DSC DOT PATTERN 6-9 7.1 2.1051 TEST SETUP, SPURIOUS EMISSIONS AT ANTENNA TERMINALS 7-3 7.2 2.1051 SPURIOUS EMISSIONS - WIDE SCAN, Po = 25 W, Fo = 156.050 MHz 7-4 7.3 2.1051 SPURIOUS EMISSIONS - WIDE SCAN, Po = 25W, Fo = 157.425 MHz 7-5 7.4 2.1051 SPURIOUS EMISSIONS - WIDE SCAN, Po = 1 W, Fo = 156.050 MHz 7-6 7.5 2.1051 SPURIOUS EMISSIONS - WIDE SCAN, Po = 1 W, Fo = 157.425 MHz 7-7 FCC IDENTIFIER: BZ6SEA157 LIST OF FIGURES, continued APPLICABLE FIGURE RULES DESCRIPTIONPAGE 8.1 2.1053 RADIATED SPURIOUS EMISSIONS, 156.050 MHZ (CH 1A) 8-4 8.2 2.1053 RADIATED SPURIOUS EMISSIONS, 156.950 MHZ (CH 19) 8-5 8.3 2.1053 RADIATED SPURIOUS EMISSIONS, 157.425 MHZ (CH 88) 8-6 8.4 2.1053 SITE PLAN FOR FIELD TEST 8-7 8.5 2.1053 FIELD TEST SETUP 8-8 8.6 2.948(d) TEST EQUIPMENT LIST FOR FIELD TEST SETUP 8-9 9.1 2.1055(a)(b)(c)TEST SETUP, FREQUENCY STABILITY VERSUS TEMPERATURE 9-3 9.2 2.1055(d)(1)(3)TEST SETUP, FREQUENCY STABILITY VERSUS PRIMARY SUPPLY VOLTAGE 9-4 9.3 2.1055(a)(1)(b)FREQUENCY STABILITY VERSUS TEMPERATURE 9-5 9.4 2.1055(c) FREQUENCY STABILITY VS. TIME AT T = -20 DEGREES C 9-6 9.5 2.1055(c) FREQUENCY STABILITY VS. TIME AT T = 0 DEGREES C 9-7 9.6 2.1055(c) FREQUENCY STABILITY VS. TIME AT T = 30 DEGREES C 9-8 9.7 2.1055(d)…

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