HYT Science and Technology Co TC1688P Two Way Radio User Manual users manaul

Shenzhen HYT Science &Technology; Co Ltd Two Way Radio users manaul

users manaul

1Forward Manual Scope This manual is intended for use by experienced technicians familiar with similar types of communication equipment. It contains all service information required for the equipment and is current as of the publication date.
2Product Safety and RF Exposure for Portable Two-Way Radios Compliance with RF Energy Exposure Standards NOTICE: This radio is intended for use in occupational/controlled applications where users have been made aware of the potential for exposure and can exercise control over their exposure. This radio device is NOT authorized for general population, consumer or similar use. BEFORE USING THIS RADIO, READ THE TRAINING MATERIAL BELOW WHICH CONTAINS IMPORTANT OPERATING INSTRUCTIONS FOR SAFE USAGE AND RF ENERGY AWARENESS AND CONTROL INFORMATION FOR COMPLIANCE WITH RF ENERGY EXPOSURE LIMITS IN APPLICABLE NATIONAL AND INTERNATIONAL STANDARDS. Federal Communication Commission (FCC) Regulations The FCC has established limits for safe exposure to radio frequency (RF) emissions from portable two-way radios. The FCC requires manufacturers to demonstrate compliance with RF exposure limits before portable two-way radios can be marketed in the U.S. When two-way radios are approved for occupational/controlled environment exposure limits, the FCC requires users to be fully aware of, and exercise control over, their exposure. Awareness and control of RF exposure can be accomplished by the use of labels, or by education and training through appropriate means, such as information and instructions in user manuals or safety booklets. Your HYT two-way radio has an RF exposure information label in the battery compartment. The training material below includes useful information about RF exposure and helpful instructions on how to control your RF exposure. Your HYT two-way radio is designed and tested to comply with a number of national and international standards and guidelines (listed below) regarding human exposure to RF electromagnetic energy. In terms of measuring RF energy for compliance with FCC exposure guidelines, your radio radiates measurable RF energy only while it is transmitting (during talking), not when it is receiving (listening) or in standby mode. Compliance and Control Guidelines and Operating Instructions for Portable Two-Way Radios To control your exposure and ensure compliance with the occupational/controlled environment exposure limits, always adhere to the following procedures: * Transmit no more than 50% of the time. To transmit (talk), push the Push-To-Talk (PTT) button. To receive calls, release the PTT button. Transmitting 50% of the time or less is
3important since the radio generates measurable RF energy exposure only when transmitting (in terms of measuring standards compliance). * Hold the radio in a vertical position in front of the face with the microphone positioned at least one inch (2.5 cm) away from the lips. Keeping the radio at the proper distance is important since RF exposure decreases with increasing distance from the antenna. * For body-worn operation, always use the radio with the HYT Belt-Clip. HYT-approved accessories, antennas, and device combinations have been tested and comply with the occupational/controlled environment RF exposure limits. The use of non–HYT approved accessories may result in exposure levels that may exceed the RF exposure limits for the occupational/controlled environment. * If you are not using a body-worn accessory and are not using the radio held in front of the face, ensure the radio is kept a minimum of 0.7 cm from the body when transmitting. Keeping the radio at a proper distance is important since RF exposure decreases with increasing distance from the antenna. FCC license Information Your HYT radio operates on communications frequencies which are subject to FCC (Federal Communications Commission) Rules & Regulations. FCC Rules require that all operators using Private Land Mobile radio frequencies obtain a radio license before operating their equipment. Application for license must be made on FCC form 601, and schedules D, E, and G. FAX: Forms can be obtained by fax from the FCC Fax-On-Demand system. Call 1-202-418-0177 from your fax machine and request document number 000600 for the form, schedules, and instructions. MAIL: Forms can be ordered by telephone, and will be sent to you by first class mail. Call the FCC Forms Hotline at 1-800-418-FORM (1-800-418-3676). INTERNET: Form 601 and instructions can be downloaded from the FCC Forms website at: http://www.fcc.gov/Forms/Form601/601.html Before filling out your Form 601 application Technical Data section, you must decide which frequency (or frequencies) you will operate on. Refer to the frequency chart on page 16. Questions? Call the FCC for license application questions at 1-888-CALL-FCC (1-888-225-5322).
4 Notices to The User This device complies with Part 15 of the 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. One or more of the following statements may be applicable: FCC WARNING This equipment generates or uses radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made.
5 SAFETY INFORMATION: Your HYT portable two-way radio has been designed using a low power transmitter. When the PTT switch is pressed, the radio generates radio frequency (RF) electromagnetic energy (EME). This radio is designed to comply with the FCC Report and Order FCC 96-326 (August, 1996). User Safety Information The following precautions are recommended for personnel safety: z DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated. z SHUT OFF and do not operate this equipment near electrical blasting caps or in an explosive atmosphere. z When in vehicles with an airbag, do not place a portable radio in the area over an airbag or in the airbag deployment area. z Do not expose the radio to direct sunlight for a long time nor place it close to a heating source. z Do not use any portable radio with a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn may result. z This equipment should be serviced by a qualified technician only. INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE FCC This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can generate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that the interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer for technical assistance.
6Contents Brief Introduction LCD Display Software Description Circuit Description CPU Pins Adjustment Description Part List 1 Assembly and Disassembly for Repair Exploded View Part List 2 Packing TC1688P PC Board View TC1688P Block Diagram TC1688P Schematic Diagram Specifications
7Brief Introduction 1. Antenna 2. Programming Jack 3. Speaker/Mic Jack 4. Power/Volume Knob Rotate the Power/Volume Knob clockwise until a “click” is heard to turn the radio on, fully counter clockwise to turn the radio off. When the radio is on, turn the knob to adjust volume. 5. LCD Display Indicate operation status of the radio. (Refer to “LCD Display” for details) 6. MENU key In standby mode, briefly press MENU key to display current channel information and hold down this key to enter menu mode. During setting, press MENU key to save and switch to the next setting. 7. “-” key Used to select the channel/interference eliminator code downwards or change menu settings. 8. MON key In standby mode, briefly press MON key to begin channel scanning; hold down MON key to begin monitoring. 9. MIC 10. Speaker 11. “ ”key (CALL key) If Call feature is enabled, briefly press the CALL key to transmit a call signal; During setting, press CALL key to save and return to the first setting or exit; Hold down the CALL key to lock/unlock keypad. 12. “+” key
8Used to select the channel/interference eliminator code upwards or change menu settings. 13. PTT button Press and hold PTT, radio operates in transmit mode. Release PTT, radio returns to receive mode. 14. Belt Clip Used to clip radio on your belt. 15. Charging Connectors Connect the charging connectors with that on the charger to begin charging.
9LCD Display 1. Battery Meter, used to indicate the battery power. 2. Appears when setting the Alarm Clock or the Alarm Clock is on; Flashes when the Alarm Clock rings. 3. Appears when keypad lock is on. 4. Appears when setting the call tone. 5. Appears when receiving signals from the selected channel. 6. Appears when transmitting. 7. Appears when transmitting/receiving is enabled. 8. Indicate that the number on the LCD displays interference eliminator code and channel number. The number under it indicates current interference eliminator code. 9. Two large “8”, a small “1” and two small “8” display the current channel number, interference eliminator code, frequency number, time or the status of current setting. 10. Indicate that the number on the LCD displays channel number and frequency number. The number above the icon indicates the frequency number of current channel. 11. Appears between hour and minute when LCD displays clock. 12. Appears when setting VOX or VOX feature is enabled. 13. Appears when scanning channel or setting channel scan add/delete. 14. Appears when setting squelch level. 15. Communication Range Alarm, flashes when your companion is out of range; appears when setting communication range alarm or communication range alarm is enabled. 16. Appears when setting the clock.
10Software Description Radio Feature Description Feature Description 1 56 UHF frequencies available Frequency Range: 461 – 470 MHz 2 Selectable number of available channels 1-8 User can select 1-8 frequencies from 56 available frequencies 3 Selectable 121 Interference Eliminator Codes Include 38 CTCSS and 83 CDCSS 4 LCD Display Display operation status and setting modes 5 LCD Backlight 6 Keypad Lock Pressing any key is invalid except PTT, briefly pressing MENU key and holding down CALL key. 7 VOX Feature Only available when connected with external audio accessory. 8 Five VOX Sensitivity Levels Available The lower the level, the higher the sensitivity. 9 Battery Power Indicator 10 Low Battery Alert The radio will sound alert when the battery voltage is lower than preset threshold value. 11 Channel Scan The radio will only scan the selected 1-8 channels. If 4 channels are selected, the radio will scan these 4 channels only. 12 Battery Save (Sleep Mode) The radio will enable battery save feature if no button is pressed and no operation takes place within 25 seconds. The radio will switch between 200ms standby mode and 600ms sleep mode. 13 Clock Display and Alarm Clock 14 Five CALL TONES available The radio will sound call tone when receiving a valid call. User can disable the call tone. 15 PC Programmable In this mode, MCU is connected with PC via UART port. 16 Enable/Disable Certain Features (through PC programming) 17 Wired Clone MCU transfer the data in one radio to another via UART port. 18 Monitor 19 Time Out Timer TOT time: 1 minute or 5 minutes. This feature can be disabled. 20 Auto Squelch 4 squelch levels available. Higher squelch level makes it harder for the radio to receive weak signals 21 Communication Range Alarm The radio will sound alert when you are almost out of communication range.
11Radio Modes Functions and Operations 1. Conventional Mode Turn the power on. If no key is pressed, the radio will enter conventional mode. In this mode, you can operate as following: z Receive or press PTT to transmit; z Display clock (It’s set by your dealer) or channel number; z Low battery detect and battery power indication; z VOX feature (Only valid when connecting with external audio accessory) (It’s set by your dealer); z Communication Range Alarm (It’s set by your dealer); z Alarm Clock (It’s set by your dealer); z Briefly press CALL key to transmit a CALL (It’s set by your dealer); z Press and hold CALL key to enable/disable keypad lock (It’s set by your dealer); z Briefly press MENU key to display current channel information (frequency number and interference eliminator code); Press and hold MENU key to enter setting menu; z Press UP/DOWN key to increase/decrease channel number; z Briefly press MONI key to enter channel scan mode; Press and hold MONI key to begin monitor; z Battery Save feature (It’s set by your dealer). User Mode Conventional Mode Clock and Alarm Clock Setting ModeMENU Mode Dealer Mode Channel Setting Mode PC Programming ModeWired Clone Mode Default Setting Mode
122. Clock and Alarm Clock Setting Mode Turn the power on while holding down CALL key and PTT key simultaneously. After 2 seconds, the radio enters clock and alarm clock setting mode. Press UP/DOWN to select upwards/downwards. Press MENU key to save and go to next setting item. Press CALL key to save and go to the first setting item. If the current item is the first setting item, press CALL key to save and exit. In this mode, you can operate as following: z Select to display clock or channel number in conventional mode; z Set hour of the clock; z Set minute of the clock; z Alarm clock enable/disable setting; z Set hour of the alarm clock; z Set minute of the alarm clock. 3. Menu Mode In conventional mode, press and hold down MENU key to enter menu mode. Press UP/DOWN to select upwards/downwards. Press MENU key to save and go to next setting item. Press CALL key to save and go to the first setting item. If the current item is the first setting item, press CALL key to save and exit. In menu mode, LCD displays “ ” icon indicating that you can transmit/receive. LCD displays channel information when pressing PTT to transmit. And the display returns to the setting mode before transmission when releasing PTT or time out timer is due. In this mode, you can operate as following: z VOX feature enable/disable and five sensitivity levels setting (It’s set by your dealer); z Call tone setting (five call tones) (It’s set by your dealer); z Button beep enable/disable (It’s set by your dealer); z Squelch level setting; z Communication rang alarm feature enable/disable (It’s set by your dealer); z Battery type setting. 4. Channel Setting Mode Turn the power on while holding down MON and PTT key simultaneously. After 2 seconds, the radio enters channel setting mode. Press UP/DOWN to select upwards/downwards. Press MENU key to save and go to next setting item. Press CALL key to save and go to the first setting item. If the current item is
13the first setting item, press CALL key to save and exit. In this mode, you can operate as following: z Select channel number from 1 to 8; z Select frequency number from 1 to 56; z Select interference eliminator code from 0 to 121; z Set the number of available channels from 1 to 8; z Scan Add/Delete. 5. PC Programming Mode Insert programming cable into the programming jack and then turn the power on, the radio enters PC programming mode. 6. Wired Clone Mode Connect the radio with wired clone cable and then turn the power on while holding down CALL and MON key simultaneously, the radio enters wired clone mode after 2 seconds. And then press MON key to begin data transmission. 7. Default Setting Mode (It’s set by your dealer) Turn the power on while holding down “+” and “-“ key simultaneously to restore the factory settings after 2 seconds.
14Circuit Description 1. Frequency Configuration The receiver utilizes double conversion. The first IF is 21.7 MHz and the second is 450 KHz. The first local oscillator signal is supplied from PLL circuit. PLL circuit in the transmitter generates the necessary frequencies. Figure 1 shows the frequency configuration. Frequency range: TC1688P: 460—470MHz (Please refer to “appendix1: TC1688P frequency chart” for more details.) 1 2 3 4ABCD4321DCBATitleNumber RevisionSizeBDate: 4-Feb-2004 Sheet of File: D:\RPV599A V2.0\material\TC-168~2.DDBDrawn By:ANTANTSW RF AMPMCF21.7MHzCF 450KHzSYSTEM AF AMP SPIFTCXO 21.25MHzMICMIC AMPPLLVCORXTXTX AMPPA AMPPLL Fig1. Frequency Configuration 2. Receiver The receiver utilizes double conversion super heterodyne. 1) Front-end RF Amplifier The signal from the antenna passes through a transmit/receive switch circuit before entering the SAW filter F1 to eliminate unwanted signals, and then is amplified at RF amplifier Q11. The resulting amplified signal then goes to the first mixer. Fig.2 Receiver Section Configuration
152) First Mixer The signal from RF amplifier is mixed with the first local oscillator signal from PLL frequency synthesizer in the first mixer Q15 to generate a 21.7 MHz first IF signal. The first IF signal is then fed through the 21.7MHz crystal filter F2 to remove spurious signals from adjacent channel. 3) IF Amplifier The first IF signal is amplified at Q6 and then enter the IF process chip IC3. The signal is mixed with the second local oscillator signal to generate a 450KHz second IF signal. The second IF signal is then fed to a 450 KHz ceramic filter F3 to eliminate unwanted signals before it is amplified and detected at IC3. 4) AF Amplifier The AF signal obtained from IC3 is filtered in IC2-A, and then amplified in Q18. Then resulting AF signal passes through an AF squelch switch IC10 and a volume control circuit and then is amplified in an AF power amplifier IC5 to drive the speaker. 5) Squelch Part of the AF signal from IC3 enters IC3 again and the noise component is amplified by a filter and an amplifier, and then enters Q21 to amplify the noise further. After rectified and filtered by D7 and C94, the DC signals goes to the analog port IC8 of the microprocessor. IC8 determines whether to output sounds from the speaker by detecting whether the input voltage is higher or lower than the preset value. To output sounds from the speaker, IC8 sends a mute and an AF control signal APA-EN to IC5. (See figure 3) Fig. 3 AF amplifier and squelch circuit
166) Receiving CTCSS/CDCSS signal 300Hz-and-higher audio frequency of the signal output from IC3 is filtered by low-pass filter IC2-B, C，D. The resulting signal TI enters the microprocessor IC8. IC8 determines whether the CTCSS/CDCSS matches the pre-set value, and controls the RX-MUTE, APA and the speaker output sounds according to the squelch result. 3. PLL Synthesizer PLL circuit generates the first local oscillator signal for reception and the RF signal for transmission. 1) PLL circuit The step frequency of PLL circuit is 5 KHz or 6.25 KHz. A 21.25MHz reference oscillator signal is divided at IC1 by a mixed counter to create a 5 KHz or 6.25 KHz reference frequency. Output signal from VCO enters the 16 pin of IC1 and is divided at IC1 by a dual-module programmable counter. The divided signal is compared in the phase comparator IC1 with a 5 KHz or 6.25 KHz reference signal. The signal from phase comparator is filtered through a low-pass filter and generates a VCO voltage adding to varicap diodes D10 to control the oscillator frequency. (See Figure 4) Fig.4 PLL Circuit 2) VCO Q4 composes Colpitts oscillator circuit together with the outside circuit. The oscillator frequency is controlled by PLL. In receive mode, the oscillator frequency is the first local oscillator frequency for reception. In transmit mode, the oscillator frequency is the RF frequency for transmission.
174. Transmitter 1) Transmitting AF The AF signal from the microphone passes through a pre-emphasis circuit, is amplified and filtered by a low-pass filter at IC6-A, B, Q5 and Q7. The resulting signal enters VCO for direct modulation. (See figure 5) 2) CTCSS/CDCSS Encoder The necessary signal for 38 CTCSS and 83 CDCSS encoder is generated by TO pin of IC8 and FM-modulated to the PLL reference signal. Since the reference OSC does not modulate the loop characteristic frequency or higher, modulation is performed at the VCO side by adjusting the balance. (See fig.5) Fig 5.Transmit AF and CTCSS/CDCSS 3) RF Amplifier The RF signal obtained from VCO buffer amplifier is amplified by Q9. The amplified signal is amplified by power amplifier Q3, Q8 and Q10 to generate RF power. (See Fig.6) BCCBAMPQ3DRIVE AMPQ8FINAL AMPQ10ANT SWD1 LPFANTANT SWD2RX Fig.6 Final Module 4) Antenna Switch and LPF The RF signal is passed through a low-pass filter network and a transmit/receive switch (D1 and D2) before it is passed to the antenna terminal. D1 is turned on in transmit mode and off in receive mode.
185. Power Supply IC4 supply stabilized power for the control circuit. In transmit mode, IC9 is turned on and supply voltage for the transmit VCO; Q2 is turned on and supply operation voltage for the transmitting front-end amplifier. In receiving mode, IC9 is turned on and supply voltage for the receive VCO high-frequency amplified circuit; Q1 is turned on and supply operation voltage for the receiving circuit. 6. Control System The IC8 CPU operates at 4.9152MHz and supply control signal voltage for the control circuit.
19Appendix 1: Frequency Chart (Initialization) Frequency No. Frequency (MHz) Frequency No. Frequency (MHz) 1 464.5000 29 462.9125 2 464.5500 30 464.4875 3 467.7625 31 464.5125 4 467.8125 32 464.5375 5 467.8500 33 464.5625 6 467.8750 34 466.0375 7 467.9000 35 466.0625 8 467.9250 36 466.0875 9 461.0375 37 466.1125 10 461.0625 38 466.1375 11 461.0875 39 466.1625 12 461.1125 40 466.1875 13 461.1375 41 466.2125 14 461.1625 42 466.2375 15 461.1875 43 466.2625 16 461.2125 44 466.2875 17 461.2375 45 466.3125 18 461.2625 46 466.3375 19 461.2875 47 466.3625 20 461.3125 48 467.7875 21 461.3375 49 467.8375 22 461.3625 50 467.8625 23 462.7625 51 467.8875 24 462.7875 52 467.9125 25 462.8125 53 469.4875 26 462.8375 54 469.5125 27 462.8625 55 469.5375 28 462.8875 56 469.5625
20Appendix 2: CTCSS Table Display Number Frequency（Hz） Display Number Frequency（Hz） 1 67.0 20 131.8 2 71.9 21 136.5 3 74.4 22 141.3 4 77.0 23 146.2 5 79.7 24 151.4 6 82.5 25 156.7 7 85.4 26 162.2 8 88.5 27 167.9 9 91.5 28 173.8 10 94.8 29 179.9 11 97.4 30 186.2 12 100.0 31 192.8 13 103.5 32 203.5 14 107.2 33 210.7 15 110.9 34 218.1 16 114.8 35 225.7 17 118.8 36 233.6 18 123.0 37 241.8 19 127.3 38 250.3
21Appendix 3: CDCSS Table Display Number CDCSS Display Number CDCSS 39 023 82 331 40 025 83 343 41 026 84 346 42 031 85 351 43 032 86 364 44 043 87 365 45 047 88 371 46 051 89 411 47 054 90 412 48 065 91 413 49 071 92 423 50 072 93 431 51 073 94 432 52 074 95 445 53 114 96 464 54 115 97 465 55 116 98 466 56 125 99 503 57 131 100 506 58 132 101 516 59 134 102 532 60 143 103 546 61 152 104 565 62 155 105 606 63 156 106 612 64 162 107 624 65 165 108 627 66 172 109 631 67 174 110 632 68 205 111 654 69 223 112 662
2270 226 113 664 71 243 114 703 72 244 115 712 73 245 116 723 74 251 117 731 75 261 118 732 76 263 119 734 77 265 120 743 78 271 121 754 79 306 80 311 81 315
23CPU Pins Pin No. Pin Name I/O Description 1 SQ I Squelch detect input 2 EXT-PTT I External Mic PTT detect pin 3 TIBI I CTCSS/CDCSS external circuit central point input 4 TI I CTCSS/CDCSS signal input 5 NC - 6 NC - 7 CNVSS 8 RESET I Reset detect pin 9 XOUT2 O 10 XIN2 I Auxiliary oscillator pin, connected with 32.768KHz crystal 11 VSS CPU Ground 12 XIN1 I 13 XOUT1 O Master oscillator pin, connected with 4.9152MHz crystal 14 VCC CPU main power supply 15 VCO-CTRL O VCO power supply control 16 RX-CTL O Receiving circuit power supply control 17 RX-MUTE O Receiving tone output control 18 TONE O TONE output pin 19 TX-CTL O Transmit circuit power supply control 20 APA-EN O AF power amplifier power control 21 MIC-EN O MIC Enable 22 LED2 O 23 LED1 O LED control 24 COM1 O 25 COM2 O 26 COM3 O 27 COM4 O LCD COM control
2428 VL3 29 VL2 30 VL1 Not connected. 31 SEG12 O 32 SEG11 O 33 SEG10 O 34 SEG9 O 35 SEG8 O 36 SEG7 O 37 SEG6 O 38 SEG5 O 39 SEG4 O 40 SEG3 O 41 SEG2 O 42 SEG1 O SEG1-SEG12 is LCD SEG control 43 FILT-CTL O CTCSS/CDCSS LPF control 44 PLL-EN O PLL enable 45 PLL-CLK O PLL serial clock 46 PLL-DATA O PLL serial data 47 ST-CTL O VOX side-tone control 48 KEY-OUT2 O 49 KEY-OUT1 O 50 KEY-IN3 I 51 KEY-IN2 I 52 KEY-IN1 I Keypad signal input output pin 53 EEP-DATA I/O EEPROM serial data 54 EEP-CLK O EEPROM serial clock 55 TXD O RS232 Transmit 56 RXD I RS232 Receive
2557 NC - 58 TO O CTCSS/CDCSS signal output 59 POW-DET I Power switch detect input 60 EXT-MIC I External Mic detect pin 61 AVSS GND input pin for A-D converter. Connect to VSS. 62 VREF I Reference power supply input 63 BAT-DET I Battery voltage detect input 64 VOX-DET I VOX signal input
26Adjustment Description Before the adjustment, please beforehand save the user’s setting. Required Test Instrument 1. Stabilized power supply 1set 1) The supply voltage can be changed between 2V and 6V DC, and the output current is 2A or more; 2) The standard output voltage is 3.6V DC; 3) The power supply output voltage stabilizes. 2. Ammeter 1 set 3. Digital Voltmeter 1 set 4. Radio Communication Test Set 1 set Test and Adjustment 1. Setting: Put the main unit under test on the jig (Note: Make sure the test terminal and the jig connect well), and turn on the power. 2. VCO Enable “Default Set Mode” function in programming software. And then press “+”, “-” and “MENU” keys simultaneously to turn on the radio and enter adjustment mode. Measurement Adjustment Item Condition Test Instrument Terminal Parts Method Specification/ Remarks Transmit VCO lock voltage CH1: Transmitting Digital Voltmeter P6 L22Adjust L22 using ceramic screwdriver until the lock voltage reaches the selected range 2.5±0.1V Receive VCO lock voltage CH1: Receiving Digital Voltmeter P6 L22 Check Around 1.0V 3. Receiver Measurement Adjustment Item Condition Test Instrument Terminal Parts Method Specification/Remarks RX IF demodulation output Adjust to CH1. Press MON for 1 second to receive. Radio Communication Test Set SSG: -60dB MOD: 1KHz, DEV: 1.5KHz FILTER: 0.3~3KHz Antenna Mic jack L20 Adjust L20 using ceramic screwdriver until the max. AF output signal appears. When adjusting, rotate the volume control to the right position so that the output won’t limit.
27Measurement Adjustment Item Condition Test Instrument Terminal Parts Method Specification/RemarksReceiving Sensitivity Adjust to CH1. Press MON for 1 second to receive. Radio Communication Test S e t SSG: -119dBm, MOD:1KHz DEV: 1.5KHzFILTER: 0.3~3KHz Antenna Mic jack Check SINAD: 12dB or higher Adjust to CH1 and set SQ as level 1 Radio Communication Test Set SSG:-119dBm, Squelch level: -122±1.5dB Squelch Adjust to CH1 and set SQ as level 4 Radio Communication Test S e t SSG: -110dBm, Antenna Mic jack Reduce the SSG output signal gradually until AF output mutes. Squelch level: -114±1.5dB 4. Transmitter (Be sure to connect the antenna or dummy load before adjustment) Measurement Adjustment Item Condition Test Instrument Terminals Parts Method Specification/Remarks±2.5ppm Transmitting Frequency Radio Communication Test S e t VC1 Use ceramic screwdriver to adjust VC1 so that the center frequency is no more than the error. Transmitting power Adjust to CH1. Press PTT to transmit. Radio Communication Test Set Ammeter Antenna Check ≥700mW Max frequency deviation Adjust to CH1. Press PTT to transmit. Radio Communication Test Set LPF: 15KHz AF OUT: 1KHz/150mV Antenna Mic Jack R77 Use screwdriver to adjust R77 so that frequency deviation is in the regulated range. Frequency deviation: 2.1KHz~2.2KHz Modulation Sensitivity Adjust to CH1. Press PTT to Radio Communication AntennaMic Jack Check Frequency deviation: 1.1KHz~1.8KHz
28transmit. Test S e t BPF:0.3~3KHzAF OUT: 1KHz/12mV Adjust to CH2 and CTCSS code automatically turns to “1”. Press PTT to transmit. Radio Communication Test S e t LPF:0.3KHz Antenna Use screwdriver to adjust R153 and R152 so that CTC frequency deviation is in the regulated range. Frequency deviation: 0.45±0.05KHz Adjust to CH3 and CTCSS code automatically turns to “38”. Press PTT to transmit. Radio Communication Test S e t LPF:0.3KHz Antenna Check Frequency deviation: 0.45±0.05KHz CTCSS /CDCSS Frequency Deviation Adjust to CH4; automatically turn to CDCSS. Press PTT to transmit. Radio Communication Test S e t LPF:0.3KHz Antenna Check Frequency deviation: 0.5±0.1KHz Set the battery as A Adjust power supply output voltage and check alert level 3.3±0.1V Low Battery Alert Level Set the battery as n Digital Voltmeter Power supply portPower supply Adjust power supply output voltage and check alert level 3.1±0.1V Set the battery as A Adjust power supply output voltage and check power off level 3.1±0.1V Low Battery Power-off Level Set the battery as n Digital Voltmeter Power supply portPower supply Adjust power supply output voltage and check power off level 3.0±0.1V 5. After adjustment, recover the original setting (before adjustment) of the radio through programming software.
29Assembly and Disassembly for Repair Fig. 1 Remove the power knob. See figure1. Fig. 2 Remove the four screws on the chassis. See figure 2. Fig. 3 The disassembled unit is shown as figure 3.
30Fig. 4 Take out the antenna spring, antenna cover and PCB. See figure 4.
31Exploded View 6983233108934353637
32 Packing
33Specifications Frequency Range 460MHz-470MHz Number of Channels 56 (Max.) Number of CTCSS 38 Number of CDCSS 83 Frequency Error ≤±2.5PPM Transmitting Power 1.0W Radiated Power 0.2W Transmitter Spurious Emission ≤20uW Modulation Limitation ±2.5KHz Bandwidth ≤8.5KHz Adjacent Channel Power Rejection ≥60dB Modulation AF Distortion ≤10% Receiving Sensitivity ≤0.3uV (12dB SINAD) Co-channel Rejection ≥-8dB Blocking ≥85dB Intermodulation Rejection ≥50dB Adjacent Channel Selectivity ≥50dB Receiver Spurious Emission ≤2nW Receiving AF Distortion ≤10%

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