PDHGMRS-3000FRS/GMRS Combination Transceiver

3. OPERATION 3.1 ICONS on LCD 1) Monitor indicator : Appears when the CTCSS isn’t in use and squelch is open. 2) Key lock indicator : Indicates that the key lock function is in use. 3) Beep ON/OFF indicator : Appears while key tone is in use. 4) Roger On/Off indicator : Appears while Roger tone is in use. 5) Battery indicator : Indicates the battery status 6) Receive signal indicator : Appears when receiving signal or squelch noise is existing. 7) ID indicator : Appears when the ID function is in use. 8) Weather mode indicator : Icon will be on steady when in the weather band mode. The Icon will blink in every 2 seconds when in the FRS mode with the alert active. 9) Channel readout : Shows the current channel number. 10) CTCSS readout : Shows the operating CTCSS frequency or code. 11) SCAN indicator : Indicates that scan is enabled. 12) CTCSS indicator : Appears when the CTCSS function is in use. 13) Dual Watch indicator : Appears when the Dual Watch function is in use. 14) Out Of Range indicator : Appears when the Out Of Range function is in use. 15) VOX (Voice Activated Transmit) Indicator : Turning on the power while pressing PTT button activates VOX function. 3.2 Key Function 1) PTT switch : Push and hold to transmit ; release to receive. 2) Monitor/EMG : Press and hold this key for over 0.5seconds to enable the receive CTCSS feature. Long press EMG 3) Up/Down key : In the stand-by mode, Pressing this button will increment or decrement the listening volume. When in function edit mode, this button will be used to adjust the unit. 4) Scan / Lock key : Push this key to momentarily to enable or disable the scan. Press and hold this key for over 2seconds to lock or unlock keypad. 5) Charger key : This base station is set up in charge protection mode to prevent Alkaline batteries in the handset from being charged by mistake. Once the charger key is pressed, this radio begins to charge the Ni-MH batteries in the handset. When the button is pressed once again, the batteries is not charged anymore. 6) Mode (Function) key : Push to select the following function setting mode. Brief press mode : 1'st press – Channel , 2’nd press – CTCSS, 3’rd press – Power Hi/Low, 4'th press – VOX Level, 5’th press – Dual Watch Channel, 6'th press – Roger On/Off, 7’th press – Beep On/Off, 8’th press – ID, 9’th press – Call, Long press mode : The radio goes to weather radio. 8) Speaker / Microphone 9) External DC power jack : 9V DC adaptor should be used for power supply 10) HAND Chager Teminal : This is used for charging handset batteries. 11) LCD (Liquid Crystal Display) 12) Transmit / Receive indicator : When receiving an incoming signal, the LED indicator will light green, and while the PTT button is pressed, the LED will light red. These LED’s are used for backlighting as well. 13) External speaker/mic Jacks : Connect an optional speaker/mic or headset, if desird. The internal mic and speaker will not function when either one is connected. 3.3 Function display Monitor Indicator: Icon appears when the monitor button is pressed and the channel monitor function is activated. Key Lock Indicator: Icon appears when the keypad is locked. This function disables keys such as channel up/down and mode. Signal Strength Indicator: Icon appears when a signal is being received. The Icon consists of five bars to indicate the received signal level. Beep Tone Indicator: Icon appears when beep tone confirmation tone is selected. Icon disappears when tone is off. Roger Beep Tone On/Off Indicator: Icon appears when the roger beep tone is selected. Icon disappears when tone is off. Battery Level Indicator: Icon indicates the battery charge level. Large Segment Display: Indicates the channel number in use. Caller ID Indicator: Icon appears when caller ID function is turned on. Icon disappears when the function is off. This works with small segment display. Coded Tone Controlled Squelch System(CTC) Indicator: Icon appears when the CTCSS tone function is active. Small Segment Display: Displays CTCSS tone option in the channel from 00 to 38, and also displays the caller ID number(01–10) when caller ID function is active. Scan Indicator: This function allows users to scan a channel to search for a valid signal. 3.4 SETTING AND OPERATION In order to communicate with other GMRS/FRS units, both you and the receiving party must be on the same channel. GMRS-3000PK has 22channels indicated by the large digits on the LCD display panel. Before trying to transmit on the selected channel, you should press the Monitor Button to check the activity on that channel. If someone is already on the selected channel, you should try another channel that is clear 1) On/Off & Volume control Switch Radio ON : Press the power button at least for 2 seconds.You will hear confirming melody to indicated the unit is on. Radio OFF : Press the power button at least for 2 seconds. Volume setting : Press up[ ̆] or down[ ̧] button to adjust a level that is most comfortable for you while monitor is active. 2) Setting the Channel and Tone Code(CTCSS) GMRS-3000PK has 22 main channels and 38 sub-channels. * 22 Frequency channels * 38 CTCSS Code ( indicated by CTC icon on the LCD ) Dual Watch mode Indicator: Icon appears when dual watch mode is active. Voice Activated Transmission (VOX) Indicator: This function allows handsfree conversation. The Icon appears when the VOX mode is activated. Out of Range Alarm Indicator: When this function is active, Icon blinks the receiving signal is getting weaker. The Icon stops blinking when the receiving signal comes back to the normal strength. Weather Mode Indicator: Icon will be on steady when in the weather band mode. The icon will blink when in the GMRS mode with the alert active. To select the channel * Turn the radio on. * Press MODE button once, [XX] digit will blink on the LCD. XX is a channel. * Press up[ ̆] or down[ ̧]button to choose the channel. * Press the PTT button or MODE button to confirm. To set the tone codes(CTCSS)…

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 Local oscillation frequency deviation.  FL1 SAW filter or FL2 MCF fail.  VCO circuit problem. -. Squelch does not work  IF IC U2 problem.  Control logic circuit problem. 5. DESCRIPTION OF RADIO CIRCUIT 5-1. Frequency synthesizer Frequency synthesizerconsists of VCO, loop filter and RFIC. RFIC includes MIX,IF, Compander and PLL. Frequency synthesizer uses the PLL of thte RFIC. a) VCO VCO is composed of ONE VCO Oscillation circuit takes colpitts circuit using variable Diode. The VCO generates GMRS frequencies and consists of L17, D5, C65, L19, C69, C70, R45, R44, R46, C71, C72, Q14, R47, C74, R48, Q15, L29, C147, C151. VCO control voltage through loop filter adjusts frequency and Microphone Signal through Modulation terminal makes modulation. N = VCO oscillation frequency / reference frequency If the desired frequency is 462.5625 MHz 1) TX : N = 462.5625 MHz / 0.00625 MHz = 74010 2) RX : N = [462.5625 MHz – 21.7 MHz] / 0.00625 MHz = 70538 A. PLL IC RFIC(PLL) is adjustable IC to produce the wished frequency which VCO provides through loop filter. It has internal counter using 21.25MHz. reference frequency to make 6.25kHz as reference Signal. VCO frequency from prescaled input is divided signal is compared with Reference signal phase in phase comparator. Built-in charger pump changes voltage (until two signals are in phase) and charged voltage supplies VCO through loop filter to produce the desired frequency. Frequency data associated with channel goes to PLL IC by CPU through CLOCK , DATA. PLL IC enables by strobe line of CPU. b) Loop Filter Loop filter is composed of C98, C166,R77, C37,R78, C102, R115 and Change spulse from U2.46 to DC . And eliminates harmonic component in Pulse. It helps VCO oscillate clearly as DC voltage is supplied into Varicap. 5-2. Receiver This is composed of Dual Conversion Super Heterodyne. First IF is 21.7Mhz. Local oscillator frequency is lower in 1’st IF than Rx frequency. It is called low side injection. Second IF is 450kHz . 2’nd local oscillator Frequency comes to 21.25MHz. a) Rx / Tx Conversion Circuit Rx signal goes to Rx / Tx conversion circuit through FIXED antenna connector, low pass filter (L1,L2,L3,C6,C1,C2,C3,C4,C5) and receiver resonance circuit composed of L4,C24. When transmitting, Voltage through R1,L5,D1 supplies,D2 of receive input is short and Tx is on condition. When PIN diode is off in condition of Rx, C87 resonate serially and make impedance matching at receiver bandpass filter.(FL1) b) Front End Front-end has Q6 to provide a high sensitivity and low noise feature. It employs SAW filter as band pass filter to eliminate image frequency and to produce enough pass band by Q6 input and output. c) 1 st Mixer The receiver which has been amplifier in the RF front-end is provided to the base of the 1 st mixer Q7. The 1 st L/O signal provide from the VCO is supplied to the emitter of Q7 and Converted to the 1 st IF 21.7 MHz d) 1 st IF Filter The signal covered by Q7 to 21.7 MHz, the 1 st frequency, change its impedance through C48, and then is infused to the fundamental MCF which has the center frequency of 21.7 MHz and the width of +/- 3.75 KHz. Here, the signal reduces the image and other unwanted signal for the 2 nd IF , and changes its impedance again through the R24. This filtered signal flows in the 1 st IF amplifier of RFIC(U2). e) 2 nd Mixer, and IF, FM Detect (U2) The receiver IF signal of 21.7 MHz, which has been infused to U2 is mixed with the 2 nd L/O converted to 450 KHz, the 2 nd IF frequency. The receiver signal converted to the 2 nd IF signal frequency passed through the FL3, the ceramic filter of 450 kHz again. The squelch circuit is composed to detect the noises from the received signal demodulate in the 40 th pin of the U2. For this purpose, the noise filter is using the OP amplifier inside the U2 f) CTCSS Detector(U3, U4) The 2 nd IF frequency comes from No.26 pin of U2 and goes to MPU through the active filter having U3 and U4. g) Audio Amplifier(U10) Demodulated audio signal enters to pin3 of AF IC (U10). It comes out to pin5 then, it reaches at speaker. 5-3. Transmitt When Tx develops with pressing PTT switch, VCO output amplifies through Q4,Q2,Q9,Q28,Q30 transmits by antenna through low pass filter. Tx RF signal produced from Tx VCO is amplified by Buffer Q4, Driver Q2, Q9 through C13,C10, L8 and entered Q28,Q30 Power Transistor input terminal with final amplification. After this stage, the signal is emitted at antenna through 50matching circuit to low pass filter (L3,L2,L1,C6,C5 C4,C3,C2,C1) to eliminate harmonic. a) Audio Modulation and Audio Amplification Audio signal produced by external or internal microphone, limits amplification, low pass filter by IC U4. Max. Frequency modulation deviation is adjusted by U4,VR1 keeps noise and audio from entering to VCO at time of Tx. Audio modulation and Audio Amplification has characteristic of 6/OCT pre-emphasis by U4. 10. CHANNEL DATA 1) GMRS Frequency Chart Main Channel Frequencies: Channel Frequency (MHz) Channel Frequency (MHz) 1 462.5625 12 467.6625 2 462.5875 13 467.6875 3 462.6125 14 467.7125 4 462.6375 15 462.5500 5 462.6625 16 462.5750 6 462.6875 17 462.6000 7 462.7125 18 462.6250 8 467.5625 19 462.6500 9 467.5875 20 462.6750 10 467.6125 21 462.7000 11 467.6375 22 462.7250 NOTE: Channels 1 through 7 are shared between GMRS and FRS radios. The channel number 20 is used for emergency channel. 2) Weather Frequency Chart Channel Frequency (MHz) Channel Frequency (MHz) 1 162.550 6 162.500 2 162.400 7 162.525 3 162.475 8 161.650 4 162.425 9 161.775 5 162.450 10 163.275 3) CTCSS Tone Frequency Chart NO FREQ.(Hz) NO FREQ. (Hz) NO FREQ. (Hz) 1 67.0 14 107.2 27 167.9 2 71.9 15 110.9 28 186.2 3 74.4 16 114.8 29 179.9 4 77.0 17 118.8 30 186.2 5 79.7 18 123.0 31 192.8 6 82.5 19 127.3 32 203.5 7 85.4 20 131.8 33 210.7 8 88.5 21 136.5 34 218.1 9 91.5 22 141.3 35 225.7 10 94.8 23 146.2 36 233.6 11 97.4 24 151.4 37 241.8 12 100.0 25 156.7 38 250.3 13 103.5 26 162.2 OF 0

APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT #: T/TTI_PDH\508ZKT2\508ZKT2TestReport.doc TABLE OF CONTENTS TABLE OF CONTENTS LIST APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CONTINUED PAGE 3......RF POWER OUTPUT PAGE 4......MODULATION CHARACTERISTICS PAGE 5......AUDIO FREQUENCY RESPONSE GRAPH PAGE 6......MODULATION LIMITING GRAPH – 300Hz PAGE 7......MODULATON LIMITING GRAPH – 1000Hz PAGE 8......MODULATION LIMITING GRAPH – 3000Hz PAGE 9......AUDIO LOW PASS FILTER GRAPH PAGE 10.....OCCUPIED BANDWIDTH PAGE 11.....OCCUPIED BANDWIDTH PLOT PAGE 12.....OCCUPIED BANDWIDTH PLOT – CW PAGE 13.....POWER LINE CONDUCTED INTERFERENCE PAGE 14.....POWER LINE PLOT LINE 1 PAGE 15.....POWER LINE PLOT LINE 2 PAGE 16.....SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 17.....UNWANTED RADIATION PAGE 18.....METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 19.....FREQUENCY STABILITY PAGE 20-23..LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE EXHIBIT 2.........SKETCH OF LOCATION EXHIBIT 3.........EXTERNAL PHOTO – FRONT VIEW EXHIBIT 4.........EXTERNAL PHOTO – TOP VIEW EXHIBIT 5.........INTERNAL PHOTO – CHASSIS VIEW EXHIBIT 6.........INTERNAL PHOTO – COMPONENT VIEW EXHIBIT 7.........INTERNAL PHOTO – COPPER VIEW EXHIBIT 8.........SCHEMATIC EXHIBIT 9.........BLOCK DIAGRAM EXHIBIT 10........USERS MANUAL EXHIBIT 11........CIRCUIT DESCRIPTION EXHIBIT 12........TUNING PROCEDURE EXHIBIT 13-14.....TEST SET UP PHOTO APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT #: T\TTI_PDH\508ZKT2\508ZKT2TestReport.doc Page 1 of 23 GENERAL INFORMATION REQUIRED FOR CERTIFICATION 2.1033(c)(1)(2) TTI TECH CO., LTD. will manufacture the FCCID: PDHGMRS-3000 GMRS/FRS COMBINATION TRANSCEIVER in quantity, for use under FCC RULES PART 95. TTI TECH CO., LTD. EUNDO BLDG. # 402, 737-19, BANPO-1DONG SEOCHO-KU, SEOUL, KOREA 137-041 2.1033 (c) TECHNICAL DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 10. 2.1033(c) (4) Type of Emission: 10K0F3E for FRS and GMRS operation 95.631 Bn = 2M + 2DK M = 2500 D = 2.5K Bn = 2(2500)+2(2500) = 10.0K 2.1033(c)(5) GMRS Frequency Range: 1. 462.5500 13. 462.7000 95.621 2. 462.5625 14. 462.7125 3. 462.5750 15. 462.7250 4. 462.5875 16. 467.5500 5. 462.6000 17. 467.5750 6. 462.6125 18. 467.6000 7. 462.6250 19. 467.6250 8. 462.6375 20. 467.6500 9. 462.6500 21. 467.6750 10. 462.6625 22. 467.7000 11. 462.6750 23. 467.7250 12. 462.6875 2.10311c)(6)(7) The Maximum Output Power Rating: GMRS – HIGH 1.2 Watts LOW .4 Watts FRS - .4 Watts FRS Authorized Bandwidth 12.5kHz 2.1033(c)(5) FRS Frequency Range: 1. 462.5625 8. 467.5625 95.627 2. 462.5875 9. 467.5875 3. 462.6125 10. 467.6125 4. 462.6375 11. 467.6375 5. 462.6625 12. 467.6625 6. 462.6875 13. 467.6875 7. 462.7125 14. 467.7125 MHz APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT #: T\TTI_PDH\508ZKT2\508ZKT2TestReport.doc Page 2 of 23 2.1033(c)(6)(7) Power Output shall not exceed 0.50 Watts effective 95.639 radiated power. There can be no provisions for 95.649 increasing the power or varying the power. 2.1033(c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY GMRS: FOR LOW POWER SETTING INPUT POWER: (9.0V)(.211A) = 1.899 Watts FOR HIGH POWER SETTING INPUT POWER: (9.0V)(.540A) = 4.860 Watts FRS: INPUT POWER: (9.0V)(.214)= 1.926 Watts 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included as EXHIBIT # 12. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 8 of this report. The block diagrams are included as EXHIBIT 9 of this report. 2.1033(c)(11) A photograph or a drawing of the equipment identification label is included as exhibit No. 1. 2.1033(c)(12) Photographs(8"X10") of the equipment of sufficient clarity to reveal equipment construction and layout, including meters, labels for controls, including any view under shields. See exhibits 3-7. 2.1033(c)(13) Digital modulation is not allowed. 2.1033(c)(14) The data required by 2.1046 through 2.1057 is submitted below. APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT #: T\TTI_PDH\508ZKT2\508ZKT2TestReport.doc Page 3 of 23 95.639 Power Output shall not exceed 50.0 Watts effective radiated power. There can be no provisions for 95.649 increasing the power or varying the power. 2.1046(a) RF power is measured by the substitution method as outlined in TIA/EIA - 603. With a nominal battery voltage of 6.0 V, and the transmitter properly adjusted the RF output measures: OUTPUT POWER: GMRS: HIGH 1.2 Watts ERP LOW .4 Watts ERP FRS: .4 Watts ERP 2.1046(a) RF power output. The test procedure used was TIA/EIA-603 S2 APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT #: T\TTI_PDH\508ZKT2\508ZKT2TestReport.doc Page 4 of 23 2.1047(a)(b) Modulation characteristics: AUDIO FREQUENCY RESPONSE The audio frequency response was measured in ac- cordance with TIA/EIA Specification 603. The audio frequency response curve is shown on the next page. The audio signal was fed into a dummy microphone circuit and into the microphone connector. The input required to produce 30 percent modulation level was measured. See Page 5 of report. 2.1047(b) Audio input versus modulation The audio input level needed for a particular per- percentage of modulation was measured in accor- dance with TIA/EIA Specification 603. The audio input curves versus modulation are on the following pages. Curves are provided for audio input frequen- cies of 300, 1000, and 3000 Hz. See Pages 6,7 & 8 of report. 95.637 Post Limiter Filter Each GMRS transmitter, except a mobile station transmitter with a power of 2.5Watts or less, must be equipped with an audio low pass filter. At any frequency between 3 & 20 kHz the filter must have an attenuation of 60log (f/3) greater than the attenuation at 1KHz. See Page 9 of report. APPLICANT: TTI TECH CO., LTD. FCC ID: PDHGMRS-3000 REPORT …

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