R74TC-600VTwo Way Radio

1 THANK YOU! We are grateful for your purchase of HYT product. We believe this easy–to-use radio will provide you with clear and reliable communications at peak efficiency. This HYT portable two-way radio is a precision device. Treat it with care, and you will enjoy years of reliable operation. MODELS COVERED IN THIS MANUAL TC-600 VHF Two-way Radio 2 Contents User Safety, Training, and General Information Compliance with RF Energy Exposure Standards FCC Compliance Precautions Product Inspection Battery Information Accessory Installation Radio Overview Features and Operation Basic Operations Time-Out-Timer (TOT) Battery Save Low Battery Alert Monitor Programmable Function Key High/Low Power Compatible Channel Bandwidth 2-Tone Encode & Decode DTMF ANI CTCSS/DCS Signalling Signalling AND/OR Logic Channel Scan Busy Channel Lockout Troubleshooting Guide Care and Cleaning Optional Accessories Frequency Chart 3 „ User Safety, Training, and General Information READ THIS IMPORTANT INFORMATION ON SAFE AND EFFICIENT OPERATION BEFORE USING YOUR HYT PORTABLE TWO-WAY RADIO. „ Compliance with RF Energy Exposure Standards 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 radio frequency electromagnetic energy. This radio complies with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF exposure environment at duty cycles of up to 50% talk-50% listen and should be used for occupational use only. In terms of measuring RF energy for compliance with the 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. Note: The approved batteries supplied with this radio are rated for a 5-5-90 duty cycle (5% talk-5% listen-90% standby), even though this radio complies with the FCC occupational RF exposure limits at duty cycles of up to 50% talk. Your HYT two-way radio complies with the following of RF e n e r g y exposure standards and guidelines: z United States Federal Communications Commission, Code of Federal Regulations; 47CFR part 2 sub-part J z American National Standards Institute (ANSI)/Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1992 z Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1999 Edition z International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1998 Industry Canada RSS-102 Exposure of Humans to RF Fields. Operational Instructions and Training Guidelines To ensure optimal performance and compliance with the occupational/controlled environment RF energy exposure limits in the above standards and guidelines, users should transmit no more than 50% of the time and always adhere to the following procedures: Transmit and Receive To transmit (talk), push the Push-To-Talk (PTT) button; to receive, release the PTT button. Hand-held radio operation Hold the radio in a vertical position with the microphone one to two inches (2.5 to 5 cm) away from the lips. Body-worn operation z Always place the radio in an HYT approved clip, holder, holster, case, or body harness for this product. Use of non-HYT-approved accessories may exceed FCC RF exposure guidelines. 4 Antennas & Batteries z Use only HYT approved, supplied antenna or HYT approved replacement antenna. Unauthorized antennas, modifications, or attachments could damage the radio and may violate FCC regulations. z Use only HYT approved, supplied batteries or HYT approved replacement batteries. Use of non- HYT -approved batteries may exceed FCC RF exposure guidelines. Approved Accessories For a list of HYT approved accessories, see the accessories page of this user manual or visit the following website which lists approved accessories: http://www.HYT.com.cn „ FCC Compliance 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 radiate 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 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 into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. FCC Requirements Your radio must be properly licensed Federal Communications Commission prior to use. Your HYT Wireless dealer can assist you in meeting these requirements. Your dealer will program each radio with your authorized frequencies, signaling codes, etc., and will be there to meet your communications needs as your system expands. 5 THANK YOU! We are grateful for your purchase of HYT product. We believe this easy–to-use radio will provide you with clear and reliable communications at peak efficiency. This HYT portable two-way radio is a precision device. Treat it with care, and you will en joy years of reliable operation. MODELS COVERED IN THIS MANUAL TC-600 UHF Two-way Radio 6 „ Precautions • Only qualified technicians are allowed to maintain this product. • Do not use the radio or charge a battery in explosive areas such as coal gas, dust, steam, etc. • Switch OFF the radio while refueling or parking at gas station. • Do not modify or adjust this radio without permission. • Do not expose the radio to direct sunlight over a long time, nor p…

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EXHIBIT B - EUT PHOTOGRAPHS EUT – Front View EUT – Rear View

EXHIBIT A - FCC ID LABELING AND LOCATION Proposed FCC ID Labeling Proposed FCC ID Location FCC ID Label Location ATTENTION! Restricted to occupational use to satisfy FCC RF exposure limits. See users manual for operating requirements. FCC ID: R74TC-600V Model: TC-600V

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS EUT – Uncovered View (1) EUT – Uncovered View (2) EUT – Uncovered View (3) EUT – Main PCB Front View EUT – Main PCB Rear View

Circuit Description 1. Frequency Configuration The receiver utilizes double conversion superheterodyne. The first IF is 45.050MHz and the second is 455KHz. The first local oscillator signal is supplied from PLL circuit. Frequency needed in the transmitter is supplied from PLL circuit. Figure 1 shows the frequency configuration. 2-Tone The output 2-Tone signal from IC1 goes to IC7 (1/4) for voltage amplification, then is processed by shaping circuit that is comprised of IC7 (2/4) and other components before being detected by IC11 Pin11. IC11 determines whether the 2-tone matches the preset value, and controls MUTE, APCO and speaker output according to squelch results. 3. PLL Frequency Synthesizer PLL circuit generates the first local oscillator signal for reception and the RF signal for transmission. 1) PLL The step frequency of PLL circuit is 5KHz\6.25KHz\12.5 KHz\25 KHz. A 12.8MHz reference oscillator signal is divided at IC2 by a fixed counter to produce a 5 KHz\6.25KHz\12.5 KHz\25 KHz reference frequency. The output signal from voltage control oscillator (VCO) passes through buffer amplifier Q14 and is divided at IC2 by the programmable dual-module counter. The divided signal is compared in the phase comparator IC2 with the 5 KHz\6.25KHz\12.5 KHz\25 KHz reference signal. The output signal from phase comparator is filtered by a low-pass filter and passed to the VCO to control the oscillator frequency. 2) VCO The operatiin frequency is generated by Q16 in transmit mode and by Q8 in receive mode. The operation frequency generates a control voltage through the phase comparator to control the varactor diodes, so that the oscillator frequency is made consistent with the preset frequency in CPU (D2 and D3 in transmit mode, D7 and D8 in receive mode). In receive mode, Q6 turns off Q16 and turns Q7 on, which causes the T/R pin to be set high. The T/R pin is set low in transmit mode. The output from Q8 and Q16 is amplified by Q14 and sent to the buffer amplifier. 4. Transmitter 1) Transmit Audio The modulation signal from microphone is amplified by IC3, pre-emphasized, then filtered by another low pass filterseparate filter(Q25 and Q24) to eliminate the frequencies higher than 3KHz. The resulting signal enters the VCO for direct FM modulation. The voice voltage amplitude control circuit Q46\R131\R601 is used to switch between wideband and narrowband. (See Figure 5) 2) CTCSS/CDCSS Encoder The signal needed by CTCSS/CDCSS encoder is generated by IC11 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 splitter. 3) DTMF/2-Tone Encoder DTMF/2-Tone signalings are generated by IC11 and outputted in parallel by Pin 48-51. The output signal is reshaped by resistor array CP7-CP10, then sent to IC3 (1/4) for amplification, and filtered by active LPF consisting of Q25, Q24 and other components to eliminate the corresponding HF emission before being passed to TX VCO for modulation. The modulated signal is applied to AF AMP through C254 for ease of monitoring. 4) RF Amplifier The transmit signal obtained from VCO buffer amplifier Q14 is amplified by Q15 and Q17. The amplified signal is passed to power amplifier Q32 and Q31, and is capable of generating a 4.0W RF power. Q50 and R617 are used to toggle between high and low power. 5) Antenna Switch and LPF The output signal from RF amplifier is passed through a low-pass filter network and a transmit/receive switch circuit before reaching the antenna terminal. The transmit/receive switch circuit is comprised of D11 and D12. D11 and D12 is turned on (conductive) in transmit mode and off (isolated) in receive mode. 5. Power The 5V reference power supply for the control circuit is derived from a LDO IC. The reference power provides a 5V voltage in transmit mode [T_V], a 5V voltage in receive mode [R_V], and a 5V voltage shared in both modes based on the control signal from the microprocessor.

Specifications Frequency Range V(150-174Mhz) Channel Capacity (simplex) 8 Channel Spacing 25KHz /12.5KHz Antenna Impedance 50Ω Microphone Impedance 2KΩ Operating Voltage 7.2V DC Frequency Stability ±5.0×10 -6 Transmitter Carrier Frequency Error ±5×10 -6 Output Power 4.0W Modulation Sensitivity 18±5mV Modulation Distorsion ≤5% Modulation Limit ≤5KHz / 2.5KHz Bandwidth ≤16 KHz / 8.5 KHz S/N ≥40dB(W)/35dB(N) Audio Response From 6 dB/oct. Pre-Emphasis ±3dB Conducted Spurious Emission ≤-25dBm Adjacent Channel Power ≤-70 d B(w) -≤-60 d B(n) Receiver Reference Sensitivity ≤ 0.28μV / 0.35μV Unsquelch Sensitivity ≤0.4μV Audio Power 500mW (4Ω) Audio Distorsion ≤5% Modulation Acceptance ≥│±7 KHz│/│±3.5 KHz│ Audio Response From 6 dB/oct. De-Emphasis +2dB -8dB Co-Channel Rejection ≥-8 d B Blocking ≥85d B Adjacent Channel Selectivity ≥60 d B / 50 d B Spurious Response Rejection ≥60 d B Intermodulation Rejection ≥50d B (w/n)

Adjustment Description The radio can be adjusted with PC programming software or by manual adjustment. Manual adjustment procedure of TC-600 is shown as follows. (Refer to “Model Set Mode” and “Manual Adjust Mode” in Software Specification section.) Instrument: Radio Communication Test Set 1 set Scanner 1 set 3A/10V Power Supply 1 set Digital Voltmeter 1 set 3A Ammeter 1 set Adjustment: 1. Initialization It’s necessary to set the model and initialize the radio before adjustment because there is no needed information in EEPROM when the radio is manufactured. Please refer to the “Model Set Mode” in Software Specification section for details. 2. Adjustment Some items can be adjusted in Conventional Mode and the others in Manual Adjust Mode. Turn on the power, the radio enters the Conventional Mode. If Manual Adjust Mode is enabled, turn on the power while holding down PTT and MONI key simultaneously, the radio enters Manual Adjust Mode in 2 seconds. (Refer to “Manual Adjust Mode” in Software Specification section.) VCO Measurement Adjustment Item Condition Test InstrumentTer mi nalPart Method Specification /Remarks 1. Power Supply 1.power supply voltage 7.2V DC 1.TX High. Turn to CH14in manual adjust mode and press PTT. 3.0V±0.1V 2.Transmit VCO Lock Voltage 2.TX Low. Turn to CH13in manual adjust mode and press PTT. TC1 >0.7V 1.RX High. Turn to CH14in manual adjust mode. 2.6V±0.1V 3. Receive VCO Lock Voltage 2.RX Low. Turn to CH13in manual adjust mode. Digital VoltmeterCV TC2 >0.7V Note: The radio transmits no matter whether VCO is locked or unlocked. Enter the Manual Adjust Mode for check in case of unlocked TX VCO. RECEIVER: (Enter the Manual Adjust Mode) Measurement Adjustment Item Condition Test Instrument TerminalPart Method Specification /Remarks 1. Band Pass Filter 1.RX Center. Turn to CH12 in manual adjust mode. Scanner ANT . TP2 TC3 TC4 TC5 Adjust the waveform to the top, and the top is flat, the bandwidth is about 20MHz, the sign of RX central frequency is at the center of the waveform. 1.RX Center. Turn to CH12 in manual adjust mode. 2. RX Low. Turn to CH13 in manual adjust mode. 2.Sensitivity 3.RX High. Turn to CH14 in manual adjust mode. Radio Communic a-tion Test Set SSG output: -118dBm MOD: 1KHz DEV: ±3KHz FILTER: 0.3-3.4kHz ANT Speaker Jack Check SINAD: 12dB or higher 1.RX Center. Turn to CH2 in manual adjust mode. Adjust by PTT or Function key. Radio Communic- ation Test Set SSG output: -117dBm Level 9 Adjust to just close the squelch. Adjust to squelch level 9 3.Squelch 2.RX Center. Turn to CH3 in manual adjust mode. Adjust by PTT or Function key. Radio Communic- ation Test Set SSG output: -125dBm ANT Speaker Jack Level 3 Adjust to just close the squelch. Adjust to squelch level 3 Transmitter Measurement Adjustment Item Condition Test Instrument Ter mi nalParts Method Specification /Remarks 1.Transmit frequency 1.TX Center. Turn to CH12 in manual adjust mode and press PTT. Radio Communic a-tion Test Set ANT TC6 Adjust it to center frequency Error≤±250Hz 2.Max. Deviation 1.TX Center. Turn to CH12 in manual adjust mode and press PTT. Radio Communic a-tion Test Set LPF: 15KHz AF:1KHz 120mV ANT MIC Jack VR2 Adjust deviation to: 4.2kHz±100Hz(W) 2.2kHz±100Hz(N) 3. Modulation Sensitivity 1.TX Center. Turn to CH12 in manual adjust mode and press PTT. Radio Communic a-tion Test Set FILTER: 0.3-3.4KHz AF: 1KHz 13±3mV ANT MIC Jack Check deviation: 2.2KHz-3.6KHz 1. TX Center. CTCSS: 67.0Hz. Turn to CH4 in manual adjust mode. 67.0Hz CTCSS 4. CTCSS Balance 2. TX Center. CTCSS: 250.3Hz. Turn to CH4 in manual adjust mode and press PTT. Radio Communic a-tion Test Set LPF:300Hz ANT VR3 Adjust VR3, deviation tested on condition 1 and condition 2 are consistent, the difference≤200Hz 250.3Hz CTCSS 5. CTCSS Deviation 1. TX Center. CTCSS: 67.0Hz. Turn to CH4 in manual adjust mode. Adjust by PTT or Function key. Adjust deviation to: 0.65kHz±100Hz(W) 0.35kHz±100Hz(N) 6. CDCSS Deviation 1. TX Center. CDCSS: 023. Turn to CH5 in manual adjust mode. Adjust by PTT or Function key. Radio Communic a-tion Test Set LPF: 300Hz ANT Adjust deviation to: 0.65kHz±100Hz(W) 0.35kHz±100Hz(N) 7. DTMF Deviation TX center, turn to CH15 in manual adjust mode Radio Communic a-tion Test Set LPF: 15KHz ANT Observe Deviation: ≤3.5KHz(W) ≤2.5KHz(N) 8. Low Battery Alert Level 1. Turn to CH1 in manual adjust mode. Adjust the power supply voltage to 5.5V. Adjust by PTT or Function key. Digital Voltmeter Adjust the level to make LED just flash. Note: In Manual Adjust Mode, when channel selector knob is rotated to CH1-CH16, MIC jack can’t connect with external cables. After adjustment is completed, short out the two SELF points and then turn the power on, the radio enters Model Set Mode. Then press PTT to disable the manual adjust mode.

Note: The test report is specially limited to the above company and this particular sample only. It may not be duplicated without prior written consent of Bay Area Compliance Lab Corp. (ShenZhen). This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the US Government. FCC PART 90 TYPE APPROVAL EMI MEASUREMENT AND TEST REPORT For Shenzhen HYT Science & Technology Co., Ltd HYT Tower, Shenzhen Hi-Tech Industrial Park North, Beihuan Rd., Nanshan District, Shenzhen, P.R.C. FCC ID: R74TC-600V December 27, 2005 This Report Concerns: Original Report Equipment Type: Two-way radio Test Engineer: Jandy Su Louise Lu Report No.: RSZ05120203 Test Date: December 19-23, 2005 Reviewed By: Chris Zeng Prepared By: Bay Area Compliance Lab Corp. (ShenZhen) 6/F, the 3rd Phase of WanLi Industrial Building, ShiHua Road, FuTian Free Trade Zone, ShenZhen, Guangdong 518038, P.R.China Tel: +86-755-33320018 Fax: +86-755-33320008 Shenzhen HYT Science & Technology Co., Ltd FCC ID: R74TC-600V Report # RSZ05120203 Page 2 of 30 FCC PART 90 TYPE APPROVAL Report TABLE OF CONTENTS GENERAL INFORMATION.......................................................................................................................................3 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ....................................................................................3 OBJECTIVE...................................................................................................................................................................3 RELATED SUBMITTAL(S)/GRANT(S).............................................................................................................................3 TEST METHODOLOGY..................................................................................................................................................3 TEST FACILITY.............................................................................................................................................................3 EXTERNAL I/O CABLE.................................................................................................................................................4 SYSTEM TEST CONFIGURATION ..........................................................................................................................5 DESCRIPTION OF TEST CONFIGURATION......................................................................................................................5 EQUIPMENT MODIFICATIONS.......................................................................................................................................5 CONFIGURATION OF TEST SETUP.................................................................................................................................6 BLOCK DIAGRAM OF TEST SETUP................................................................................................................................6 SUMMARY OF TEST RESULTS...............................................................................................................................7 §2.1046, and §90.205 - CONDUCTED OUTPUT POWER .......................................................................................8 APPLICABLE STANDARD..............................................................................................................................................8 TEST EQUIPMENT LIST AND DETAILS...........................................................................................................................8 TEST PROCEDURE........................................................................................................................................................8 TEST DATA..................................................................................................................................................................8 §2.1047, and §90.207 - MODULATION CHARACTERISTIC ...............................................................................11 APPLICABLE STANDARD............................................................................................................................................11 TEST EQUIPMENT LIST AND DETAILS.........................................................................................................................11 TEST PROCEDURE......................................................................................................................................................11 TEST DATA................................................................................................................................................................11 §2.1049, and § 90.209 – OCCUPIED BANDWIDTH ...............................................................................................15 A PPLICABLE S TANDARD ............................................................................................................................................15 T EST E QUIPMENT L IST AND D ETAILS .........................................................................................................................15 T EST P ROCEDURE ......................................................................................................................................................16 TEST DATA................................................................................................................................................................16 §2.1051 and §90.210 - SPURIOUS EMISSIONS AT ANTENNA TERMINALS ..................................................19 APPLICABLE STANDARD............................................................................................................................................19 TEST EQUIPMENT LIST AND DETAILS............................................................................................................…

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EXHIBIT D - TEST SETUP PHOTOGRAPHS Radiated Emission - Front View Radiated Emission - Rear View Frequency Stability