K6630083220VHF FM Marine Transceiver

FCC ID: K6630083220 IC ID: 511B-30083220 Operating Manual 1/14 Vertex Standard Co., Ltd. HX370S Operating Manual SAFETY TRANING INFORMATION This Radio has been tested and complies with the Federal Communications Commission (FCC) RF exposure limits for Occupational Use/Controlled exposure environment. In addition, it complies with the following Standards and Guidelines: - FCC 96-326, Guidelines for Evaluating the Environmental Effects of Radio-Frequency Radiation. - FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields. - ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3kHz to 300 GHz. - ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic Fields-RF and Microwave. WARNING: This radio generates RF electromagnetic energy during transmit mode. This radio is designed for and classified as Occupational Use Only, meaning it must be used only during the course of employment by individuals aware of the hazards, and the ways to minimize such hazards. This radio is not intended for use by the General Population in an uncontrolled environment. CAUTION: To ensure that your expose to RF electromagnetic energy is within the FCC allowable limits for occupational use, always adhere to the following guidelines: - This radio is NOT approved for use by the general population in an uncontrolled environment. This radio is restricted to occupational use, work related operations only where the radio operator must have the knowledge to control its RF exposure conditions. - When transmitting, hold the radio in a vertical position with its microphone 1 to 2 inches (2.5 to 5 cm) away from your mouth and keep the antenna at least 1 inch (2.5cm) away from your head and body. - The radio must be used with a maximum operating duty cycle not exceeding 50 %, in typical Push-to-Talk (PTT) configurations. DO NOT transmit for more than 50 % of total radio use time (50 % duty cycle). Transmitting more than 50 % of the time can cause FCC RF exposure compliance requirements to be exceeded. The radio is transmitting when the red LED on the top of the radio is illuminated. You can cause the radio to transmit by pressing the PTT button. - DO NOT transmit when the radio is used in Body Worn configuration with the following accessory: belt-clip (CLIP-14). It must be used ONLY for (1) there is a 4 cm distance from the body during transmitting, (2) monitoring purposes, using the speaker only and (3) for carrying purposes. - Always use Standard Horizon authorized accessories. The information listed above provides the user with the information needed to make him or her aware of RF exposure, and what to do to assure that this radio operates with the FCC RF exposure limits of this radio. Electromagnetic Interference/Compatibility During transmissions, this radio generates RF energy that can possibly cause interference with other devices or systems. To avoid such interference, turn off the radio in areas where signs are posted to do so. Do not operate the transmitter in areas that are sensitive to electromagnetic radiation such as hospitals, health care facilities, aircraft, and blasting sites. FCC ID: K6630083220 IC ID: 511B-30083220 Operating Manual 2/14 Vertex Standard Co., Ltd. FCC LICENSE INFORMATION This radio operates on communications frequencies which are subject to FCC (Federal Communications Commission) Rules and Regulations. FCC Rules require that all operators using Marine / Private Land Mobile radio frequencies obtain a radio license before operating their equipment. FCC ID: K6630083220 IC ID: 511B-30083220 Operating Manual 3/14 Vertex Standard Co., Ltd. 1. GENERAL INFORMATION 1.1 INTRODUCTION The HX370S is a handheld two-way VHF transceiver. The transceiver has marine, 10 weather (WX) and 40 Land use (LMR) channels. The marine and land channels are selectable to comply with either USA, International, or Canadian regulations. It has an emergency channel 16 which can be immediately selected from any channel by pressing the 16/9 key. Weather channels can also be accessed immediately by pressing the WX key. The transceiver includes following features: memory scanning, Priority Scanning, weather alert, battery saver, easy-to-read large LCD display, EEPROM memory back-up, battery life displayed on LCD, and a transmit time-out timer (TOT). 1.2 FCC/INDUSTRY CANADA INFORMATON The following data pertaining to the transceiver is necessary to fill out the license application. FCC Type Accepted: Part 80/Part 90 Output Power with FNB-83/FNB-V57IS: 1 watt (Low), 2.5 watts (Mid), and 5 watts (High) Emission: 16K0G3E (Marine Band) / 16K0F3E, 11K0F3E (LMR Band) Frequency Range: 156.025-157.425 MHz (Marine Band) / 137-174 MHz (LMR Band) FCC Type Number: Industry Canada Type Approval: Additional FCC and Industry Canada data, including licensing requirements, are contained in the companion document titled OWNWER’S MANUAL SUPPLEMENT. The document also contains charts for VHF channel assignments, transceiver operating procedures, maintenance, factory service information, and warranty data. 2. ACCESSORIES 2.1 PACKING LIST When the package containing the transceiver is first opened, please check it for the following contents: • HX370STransceiver • FNB-83Ni-MH Battery Pack • CD-26Charger Cradle • NC-88B120VAC Wall Charger for CD-26 • CAT-460Antenna • CLIP-14Belt Clip with screw • Lanyard • Owner’s Manual • Owner’s Manual Supplement 2.2 OPTIONS FNB-V57ISNi-Cd Battery Pack FBA-25Alkaline Battery Case ATV-8AAntenna ATV-8BAntenna ATV-8CAntenna CMP460Noise-canceling Waterproof Speaker/Microphone MH-57A4BSpeaker/Microphone VC-24VOX Headset VC-27VOX Earpiece/Microphone E-DC-19DC Cable with 12 V Cigarette Lighter Plug for CD-26 E-DC-6DC Cable; plug and wire only for CD-26 MCC460 Soft Case FCC ID: K6630083220 IC ID: 511B-3…

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HX370S VHF/FM Marine Handheld Transceiver Owner's Manual HX370S TABLE OF CONTENTS FCC LICENSE INFORMATION ...... 3 FCC NOTICE .................................. 4 1. GENERAL INFORMATION ........ 5 2. ACCESSORIES .......................... 6 2.1 PACKING LIST ........................................ 6 2.2 OPTIONS ................................................ 6 3. BATTERY ................................... 7 3.1 BATTERY CHARGING ........................... 7 3.2 BATTERY REMOVAL/INSTALLATION ... 7 3.3 USING THE NC-88 BATTERY CHARGER ..... 8 3.4 FBA-25A ALKALINE BATTERY CASE .... 8 3.5 BATTERY SAFETY ................................. 9 4. CONTROLS AND INDICATORS ...10 4.1 CONTROLS and CONNECTIONS ....... 11 4.2 INDICATORS ........................................ 13 5. OPERATION ............................. 15 5.1 INITIAL SETUP ..................................... 15 5.2 RECEPTION ......................................... 16 5.3 TRANSMISSION ................................... 17 5.4 TRANSMIT TIME-OUT TIMER (TOT) ... 17 5.5 USA, CANADIAN, AND INTERNATIONAL BANDS .... 18 5.6 NOAA WEATHER CHANNELS ............. 18 5.7 SCAN .................................................... 20 5.8 PROGRAMMABLE PRIORITY SCAN .. 21 5.9 DUAL WATCH ....................................... 21 5.10 EMERGENCY (CHANNEL 16 USE) ... 22 5.11 CALLING ANOTHER VESSEL (CHANNEL 16 OR 9) ... 22 5.12 OPERATING ON CHANNEL 13 .......... 23 5.13 OPERATING ON CHANNEL 67 .......... 23 5.14 PRESET CHANNELS (1 ~ 8): INSTANT ACCESS .... 24 5.15 SIMPLEX/DUPLEX CHANNEL USE ... 25 5.16 ENABLING S.O.S STROBE OPERATION ..... 25 5.17 VOICE SCRAMBLER UNIT ................ 26 5.18 SETUP MODE .................................... 27 5.19 CLONING ............................................ 30 5.20 RESETTING THE TRANSCEIVER’S MICROPROCESSOR .... 31 6. MAINTENANCE........................ 32 7. PRODUCT SUPPORT INQUIRIES ..33 8. CHANNEL ASSIGNMENTS ..... 33 9. WARRANTY ............................. 40 10. SPECIFICATIONS .................. 43 HX370S RF Exposure Safety Statement This Radio has been tested and complies with the Federal Communications Commission (FCC) RF exposure limits for Occupational Use/Controlled expo- sure environment. In addition, it complies with the following Standards and Guide- lines:
FCC@96-326, Guidelines for Evaluating the Environmental Effects of Radio- Frequency Radiation.
FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evaluating Compli- ance with FCC Guidelines for Human Exposure to Radio Frequency Electro- magnetic Fields.
ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3kHz to 300 GHz.
ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic Fields-RF and Microwave. WARNING This radio generates RF electromagnetic energy during transmit mode. This radio is designed for and classified as Occupational Use Only, meaning it must be used only during the course of employment by individuals aware of the hazards, and the ways to minimize such hazards. This radio is not in- tended for use by the General Population in an uncontrolled environment. CAUTION To ensure that your expose to RF electromagnetic energy is within the FCC allowable limits for occupational use, always adhere to the following guidelines: SAFETY INFORMATION This radio is NOT approved for use by the general population in an uncon- trolled environment. This radio is restricted to occupational use, work re- lated operations only where the radio operator must have the knowledge to control its RF exposure conditions.
When transmitting, hold the radio in a vertical position with its microphone 1 to 2 inches (2.5 to 5 cm) away from your mouth and keep the antenna at least 1 inch (2.5cm) away from your head and body.
The radio must be used with a maximum operating duty cycle not exceed- ing 50 %, in typical Push-to-Talk (Manual PTT or VOX) configurations. DO NOT transmit for more than 50 % of total radio use time (50 % duty cycle). Transmitting more than 50 % of the time can cause FCC RF expo- sure compliance requirements to be exceeded. The radio is transmitting when the red LED on the front panel of the radio is illuminated. You can cause the radio to transmit by pressing the PTT button or by speaking into the microphone if using the optional VC-24 VOX accessory.
Only use the Standard Horizon accessories designed for this product de- tailed on Page 6. Page 1 HX370S Congratulations on your purchase of the HX370S! Whether this is your first portable marine VHF transceiver, or if you have other STANDARD HORIZON equipment, the STANDARD HORIZON organization is committed to ensur- ing your enjoyment of this high-performance transceiver, which should pro- vide you with many years of satisfying communications even in the harshest of environments. STANDARD HORIZON technical support personnel stand behind every product we sell, and we invite you to contact us, should you require technical advice or assistance, at (800)767-2450. We appreciate your purchase of the HX370S, and encourage you to read this manual thoroughly, so as to learn and understand the capabilities of the HX370S fully. Page 2 ABOUT VHF MARINE RADIO The radio frequencies used in the VHF marine band lie between 156 and 158 MHz with some shore stations available between 161 and 163 MHz. The marine VHF band provides communications over distances that are essentially “line of sight” (VHF signals do not travel well through objects such as buildings, hills or trees). Actual transmission range de- pends much more on antenna type, gain and height than on the power output of the transmitter. The approximate distance a portable 5W radio may communicate is about 5 miles in if there are no obstructions (build- ings, hills etc.) restricting line of sight transmission. ABOUT LMR CHANNELS The HX370S is capable of PC programming 40 LMR (Land Mobile Ra- dio) channels by a dealer…

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FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Front view with Antenna Rear view with Antenna FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Front view without Antenna Rear view without Antenna FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Rear view without Battery Pack Left view FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Right view Top view FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Bottom view Top of Battery Charger (CD-26) FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Bottom of Battery Charger Top of AC Adapter (NC-83B) FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Bottom of AC Adapter Speaker/Microphone (CMP460) FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Speaker/Microphone (MH-57A4B) VOX Headset (VC-24) FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. VOX Earpiece/Microphone (VC-27) Battery Pack (FNB-83) FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Battery Pack (FNB-V57IS) Antenna

HX370SHX370S LABEL DRAWINGLABEL DRAWING Vertex Standard Co., Ltd.Vertex Standard Co., Ltd. ID / Part 15.19 and CAUTION drawings ID drawing Part 15.19 and CAUTION drawings Label location HX370S K6630083220 511B-30083220 4909959000000 ! ! Device restricted to occupational use to satisfy FCC RF exposure compliance. See owner's manual for specific operating requirement CAUTION This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.

FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Removed Front Panel Side-A of MAIN-UNIT with LCD FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Side-A of MAIN-UNIT without LCD Side-B of MAIN-UNIT FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Front of LCD Back of LCD FCC ID: K6630083220 IC ID: 511B-30083220 Vertex Standard Co., Ltd. Inside of front panel Inside of chassis

FCC ID: K6630083220 IC ID: 511B-30083220 Circuit Description 1/3 Vertex Standard Co., Ltd. HX370S Circuit Description 1. Receive Signal Path Incoming RF from the antenna jack is delivered to the RF Unit and passes through a low- pass filter consisting of coils L1023, L1026, and L1027, capacitors C1227, C1273, C1276, C1270, C1257, and C1256, and antenna switching diode D1036. Signals within the frequency range of the transceiver enter a Varactor-tuned band-pass filter consisting of coils L1022 and L1021, capacitors C1246, C1244, and C1242, and diodes D1048, then amplified by Q1058 and enter a Varactor-tuned band-pass filter consisting of coils L1018, L1017 and L1016, capacitors C1211, C1208, C1210, C1212, C1209, C1207, C1198, C1197, C1196, C1195, and C1194, and diodes D1032, D1031, and D1029, before first mixing by Q1054. Buffered output from the VCO is amplified by Q1024 to provide a pure first local signal between 112.3 and 152.3 MHz for injection to the first mixer Q1054. The 21.7 MHz first mixer product then passes through monolithic crystal filter XF1001/XF1002 to strip away all but the desired signal, which is then amplified by Q1046. The amplified first IF signal is applied to FM IF subsystem IC Q1039, which contains the second mixer, second local oscillator, limited amplifier, noise amplifier, and RSSI amplifier. A second local signal is produced from the PLL reference/second local oscillator of X1001 (21.25 MHz). The 21.25 MHz reference signal is delivered to mixer section of Q1039 which produce the 450 kHz second IF mixed with the first IF signal. The second IF then passes through the ceramic filter CF1001 (on “Narrow” channels) or CF1002 (on “Wide” channels) to strip away unwanted mixer products, and is then applied to the limited amplifier in Q1039, which removes amplitude variations in the 450kHz IF, before detection of the speech by the ceramic discriminator CD1001. 2.Audio Amplifier The demodulated audio signal from the Q1039 passes through a band-pass filter and High-pass filter to the Voice Scrambler Unit when the optional Scrambler Unit is installed, then applied to the de-emphasis. Then passes through the audio volume and the audio power amplifier Q1010, providing up to 400 mW of audio power to the 4 Ω loudspeaker. 3. Squelch Control The squelch circuitry consists of a noise amplifier and band-pass filter and noise detector within Q1039. When no carrier received, noise at the output of the detector stage in Q1039 is amplified and band-pass filtered by the noise amplifier section of Q1039 and the network between pins 7 and 8, and then rectified by detection circuit in Q1039. The resulting DC squelch control voltage is passed to pin 52 of the microprocessor Q1066. If no carrier is received, this signal causes pin 52 of Q1066 to go high and pin 30 to go high. Pin 11 signals of Q1053 to disable the supply voltage to the audio amplifier Q1010, while pin 7 hold the green (Busy) half of the LED off, when pin 11 is high and pin 7 is high. Thus, the microprocessor blocks output from the audio amplifier, and silences the receiver, while no signal is being received (and during transmission, as well). When a carrier appears at the discriminator, noise is removed from the output, causing pin 75 of Q1039 to go low and the microprocessor to activate the ”Busy” LED via Q1053. The microprocessor then checks for CTCSS or CDCSS code squelch information, if enabled. If not transmitting and CTCSS or CDCSS is not activated, or if the received tone or code matches that programmed, allows audio to pass through the audio amplifier Q1010 to the loudspeaker by enabling the supply voltage to it via Q1014. 4. Transmit Signal Path The speech input from the microphone MC1001 passes through the audio amplifier FCC ID: K6630083220 IC ID: 511B-30083220 Circuit Description 2/3 Vertex Standard Co., Ltd. Q1076 to Q1076, which is, adjusted the microphone gain. The speech signal passes through pre-emphasis circuit to Q1076, which contains the IDC, and low-pass filter. The filtered audio signal is applied to Q1033 which is adjusted the audio level, then is applied to varactor diode D1006, which frequency modulates the VCO Q1012. A portion of the audio signal from Q1033 is applied to X1001. The processed audio may then be mixed with a CTCSS tone generated by Q1066 for frequency modulation of the PLL carrier (up to ±5 kHz from the unmodulated carrier) at the transmitting frequency. If a CDCSS code is enabled for transmission, the code is generated by microprocessor Q1066 and delivered to X1001 (21.25 MHz) for CDCSS modulating. The modulated signal from the VCO Q1012 is buffered by Q1013. The low-level transmit signal is then passes through the TX switching diode D1012 to the buffer amplifier Q1032, driver amplifier Q1036, then amplified transmit signal is applied to the final amplifier Q1045 up to 5.0 watts output power. The transmit signal then passes through the antenna switch D1034 and is low-pass filtered to suppress harmonic spurious radiation before delivery to the antenna. 4-1 Automatic Transmit Power Control Current from the final amplifier is sampled by C1237, C1236, C1208, R1273, and R1272, and is rectified by Q1062. The resulting DC is fed back through Q1062 to the drive amplifier Q1036 and final amplifier Q1045, for control of the power output. The microprocessor selects ”High” or “Low” power levels. 4-2 Spurious Suppression Generation of spurious products by the transmitter is minimized by the fundamental carrier frequency being equal to final transmitting frequency, modulated directly in the transmit VCO. Additional harmonic suppression is provided by a low-pass filter consisting of coils L1012 and L1013 plus capacitors C1165, C1291, C1167, C1169, and C1190, resulting in more than 60 dB of harmonic suppression prior to delivery to the antenna. 5. PLL Frequency Synthesizer The PLL circuitry on the Main Unit consists of VCO Q1012, VCO buffer Q1013, PLL subsystem IC Q1017, which contains a reference …

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1/2 FCC ID: K6630083220 IC ID: 511B-30083220 Component Applications Address Device nameDescriptionApplication [MAIN-UNIT] D 1001 Diode1SS400Riple Filter D 1002 DiodeDA221Protect D 1003 Diode1SS400Mic Mute D 1004 Zener DiodeEDZ TE61 5.1BProtect D 1005 DiodeHSC277VCO Modulator D 1006 Varactor DiodeHVC350BVCO Modulator D 1007 DiodeHSC277VCO Shift SW D 1009 Varactor DiodeHVC350BREF Tune D 1010 Varactor DiodeHVC350BDCS Modulator D 1011 DiodeDA221CPU Reset D 1012 DiodeDAN235ETX/RX RF SW D 1013 DiodeDA221SQL Noise Detect D 1015 DiodeDAN222Filter SW D 1016 LED19-215UYOC/S530A2LED Indicator D 1017 LED19-215UYOC/S530A2LED Indicator D 1018 LED19-215UYOC/S530A2LED Indicator D 1019 LED19-215UYOC/S530A2LED Indicator D 1020 Diode1SS400Level Shift D 1021 LEDCL-191WBLED Indicator D 1022 LED19-215UYOC/S530A2LED Indicator D 1023 LED19-215UYOC/S530A2LED Indicator D 1026 DiodeDAN222Filter SW D 1027 LEDCL-165HR/YGLED Indicator D 1028 DiodeDA221Limiting Diode D 1029 Varactor DiodeHVC350BBPF Tune D 1031 Varactor DiodeHVC350BBPF Tune D 1032 Varactor DiodeHVC350BBPF Tune D 1033 Diode1SS400Limiting Diode D 1034 DiodeRLS135ANT SW D 1035 Diode1SS321Power Detect D 1036 DiodeRLS135ANT SW D 1038 DiodeDAN222Tone/WX SW D 1039 DiodeDA221Limiting Diode D 1040 Diode1SS400Key Matrix D 1041 Diode1SS400Key Matrix D 1042 Diode1SS400Key Matrix D 1043 Diode1SS400Key Matrix D 1044 DiodeRB521S-30CPU Back up D 1045 Diode1SS400Level Shift D 1046 DiodeDA221SQL Noise Detect D 1047 Zener DiodeEDZ TE61 3.9BFilter SW Control D 1048 Varactor Diode1SV323BPF Tune D 1049 Diode1SS400IC Reset D 1050 Serge absorberTVSF0805**Serge absorber D 1051 Serge absorberTVSF0805**Serge absorber Q 1001 Transistor2SC4617Riple Filter Q 1002 TransistorDTA114TESave SW Q 1003 TransistorDTA114TESave SW Q 1004 Transistor2SC4617Save SW Q 1005 TransistorDTC143ZEVOL Control SW Q 1006 TransistorDTA144EEPTT Control Q 1007 Transistor2SA1774PLL Lock Detect Q 1008 ICS-812C30AMC-C2K3V Regulator Q 1009 TransistorUMD2NClone Control Q 1010 ICTDA2822D013AF Power AMP Q 1011 FET2SJ347Mic AMP SW Q 1012 Transistor2SC5231VCO Q 1013 Transistor2SC5374VCO Buff AMP Q 1014 TransistorFMMTL718AF Power AMP Control Q 1016 Transistor2SC5374Buff AMP Q 1017 ICMB15A01PFVPLL Subsystem Q 1019 TransistorFMMTL7185V Regulator Q 1020 TransistorUMW1N5V Regulator Q 1021 Transistor2SC4617AF Power AMP Control Q 1022 Transistor2SA1774AF Power AMP Control Q 1023 ICBD4845FVECPU Reset Q 1024 Transistor2SC5374Buff AMP Q 1025 Transistor2SA1774TX/RX SW HX370S Vertex Standard Co., Ltd. 2/2 FCC ID: K6630083220 IC ID: 511B-30083220 Component Applications Address Device nameDescriptionApplication HX370S Q 1026 Transistor2SC4617CPU Reset Q 1028 TransistorUMW1NTX/RX SW Q 1029 TransistorDTA143XETX/RX SW Q 1030 Transistor2SC4617CPU Reset Q 1031 TransistorFMMTL618LED Indicator Control Q 1032 Transistor2SC5226TX Buff AMP Q 1033 ICM62364FPD/A Convertor Q 1034 Transistor2SC4617LED Indicator Control Q 1035 Transistor2SC4617LED Indicator Control Q 1036 FET2SK3074TX Driver AMP Q 1037 Transistor2SA1774Filter SW Control Q 1038 Transistor2SA1774Filter SW Control Q 1039 ICNJM2591VIF Subsystem Q 1040 Transistor2SC4617Disc Control Q 1041 TransistorDTC144EEFilter SW Control Q 1042 FET2SJ364RX AF Mute Q 1043 FET2SJ364Scrambler Control Q 1044 Transistor2SC4617LED Indicator Control Q 1045 FETRD07MVS1RF Power AMP Q 1046 Transistor2SC44001st IF AMP Q 1047 Transistor2SC4617AF BPF AMP Q 1048 FET2SJ364Scrambler Control Q 1049 FET2SJ364Scrambler Control Q 1050 TransistorDTC144EEScrambler Control Q 1052 Transistor2SC4617AF BPF AMP Q 1053 ICBU4094BCFVShift Register Q 1054 FET3SK3201st Mixer Q 1055 Transistor2SC5374Clock Shift Q 1058 Transistor2SC5006RX RF AMP Q 1059 TransistorDTC144EETone Filter SW Q 1060 Transistor2SC4617Tone/WX SW Q 1061 TransistorDTC144EETone/WX SW Q 1062 ICLM2904APC AMP Q 1063 TransistorDTC144EETone/WX SW Q 1064 TransistorDTC144EETone Filter SW Q 1066 ICHD64F2266TF13Microproccesor Q 1067 ICAT24C128N-10SI-2.7Programmable Data Store Q 1074 ICLM2902PWRTone Filter Q 1075 ICLM2904PWRWX Filter Q 1076 ICLM2902PWRMic AMP Q 1078 ICLM2904PWRAF HPF AMP Q 1079 ICLM2904PWRDC Buff AMP Q 1080 TransistorDTC144EE TLPLL Loop Filter SW Vertex Standard Co., Ltd.

FCC ID: K6630083220 IC ID: 511B-30083220 Alignment 1/3 Vertex Standard Co., Ltd. HX370S Alignment The HX370S has been carefully aligned at the factory for the specified performance across the land mobile band. Realignment should therefore not be necessary except in the event of a component failure. All component replacement and service should be performed only by an authorized STANDARD HORIZON representative, or the warranty policy may be voided. The following procedures cover the sometimes critical and tedious adjustments that are not normally required once the transceiver has left the factory. However, if damage occurs and some parts are replaced, realignment may be required. If a sudden problem occurs during normal operation, it is likely due to component failure; realignment should not be done until after the faulty component has been replaced. We recommend that servicing be performed only by authorized STANDARD HORIZON service technicians who are experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a fault is suspected, contact the dealer from whom the transceiver was purchased for instructions regarding repair. Authorized STANDARD HORIZON service technicians realign all circuits and make complete performance checks to ensure compliance with factory specifications after replacing any faulty components. Those who do undertake any of the following alignments are cautioned to proceed at their own risk. Problems caused by unauthorized attempts at realignment are not covered by the warranty policy. Also, STANDARD HORIZON must reserve the right to change circuits and alignment procedures in the interest of improved performance, without notifying owners. Under no circumstances should any alignment be attempted unless the normal function and operation of the transceiver are clearly understood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the need for realignment determined to be absolutely necessary. The following test equipment (and thorough familiarity with its correct use) is necessary for complete realignment. Correction of problems caused by misalignment resulting from use of improper test equipment is not covered under the warranty policy. While most steps do not require all of the equipment listed, the interactions of some adjustments may require that more complex adjustments be performed afterwards. Do not attempt to perform only a single step unless it is clearly isolated electrically from all other steps. Have all test equipment ready before beginning, and follow all of the steps in a section in the order presented. FCC ID: K6630083220 IC ID: 511B-30083220 Alignment 2/3 Vertex Standard Co., Ltd. Required Test Equipment 1. RF Signal Generator with calibrated output level at 200 MHz 2. Deviation Meter (linear detector) 3. AF Millivoltmeter 4. SINAD Meter 5. Inline Wattmeter with 5% accuracy at 200 MHz 6. Regulated DC Power Supply: adjustable from 6 to 17 VDC, 3A 7. 50-ohm Non-reactive Dummy Load: 10W at 200 MHz 8. Frequency Counter: >0.1 ppm accuracy at 200 MHz 9. AF Signal Generator 10. DC Voltmeter: high impedance 11. VHF Sampling Coupler 12. AF Dummy Load: 8 ohm, 2W 13.Oscilloscope 14.Spectrum Analyzer Alignment Preparation & Precautions A dummy load and inline wattmeter must be connected to the main antenna jack in all procedures that call for transmission, except where specified otherwise. Correct alignment is not possible with an antenna. After completing one step, read the following step to determine whether the same test equipment will be required. If not, remove the test equipment (except dummy load and wattmeter, if connected) before proceeding. Correct alignment requires that the ambient temperature be the same as that of the transceiver and test equipment, and that this temperature be held constant between 20 and 30°C (68 86°F). When the transceiver is brought into the shop from hot or cold air it should be allowed some time for thermal equalization with the environment before alignment. If possible, alignments should be made with oscillator shields and circuit boards firmly affixed in place. Also, the test equipment must be thoroughly warmed up before beginning. Note: Signal levels in dB referred to in this procedure are based on 0 dBm = 0.5 μV(closed circuit). FCC ID: K6630083220 IC ID: 511B-30083220 Alignment 3/3 Vertex Standard Co., Ltd. PLL & Transmitter Set up the test equipment as shown for transmitter alignment. Maintain the supply voltage at 7.5V DC for all steps. To set up Alignment, press the [ ▼ ] key and [MEM]key while turning the transceiver on. PLL Reffrence Frequency 1) Press the [ ▼ ] or [ ▲ ] key, and set [rEF] on display. Then, press the [PRESET] key, the radio now is in the Reference Frequency Alignment Mode. 2) With the wattmeter, dummy load and frequency counter connected to the antenna jack, while transmit this frequency, and press the [ ▼ ] or [ ▲ ] key to adjust frequency, if necessary, so the counter frequency is within 100 Hz of this frequency. And press the [PRESET] key to return to the menu mode. Transmitter Output Press the [ ▼ ] or [ ▲ ] key, and set [HP] on display. Then, press the [PRESET] key, the radio now is in the Transmitter High Output Alignment Mode. While transmit this frequency, and press the [ ▼ ] or [ ▲ ] key to adjust the output power to 5 W. And press the [PRESET] key to return to the menu mode. Press the [ ▼ ] or [ ▲ ] key, and set [CP] on display. Then, press the [PRESET] key, the radio now is in the Transmitter Mid Output Alignment Mode. While transmit this frequency, and press the [ ▼ ] or [ ▲ ] key to adjust the output power to 2.5 W. And press the [PRESET] key to return to the menu mode. P…

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