ALH29492110VHF-FM Face Held Transceiver

© B62-1264-00 (K,K3,M,E) 09 08 07 06 05 04 03 02 01 00 KENWOOD CORPORATION INSTRUCTION MANUAL VHF FM TRANSCEIVER TK-285 TK-385 UHF FM TRANSCEIVER EXPLOSIVE ATMOSPHERES (GASES, DUST, FUMES, etc.) Turn off your transceiver while taking on fuel, or while parked in gasoline service stations. uGOVERNMENT LAW PROHIBITS THE OPERATION OF UNLICENSED RADIO TRANSMITTERS WITHIN THE TERRITORIES UNDER GOVERNMENT CONTROL. uILLEGAL OPERATION IS PUNISHABLE BY FINE OR IMPRISONMENT OR BOTH. uREFER SERVICE TO QUALIFIED TECHNICIANS ONLY. SAFETY: It is important that the operator is aware of and understands hazards common to the operation of any transceiver. THANK YOU We are grateful you chose KENWOOD for your land mobile radio applications. We believe this easy-to-use transceiver will provide dependable communications to keep personnel operating at peak efficiency. KENWOOD transceivers incorporate the latest in advanced technology. As a result, we feel strongly that you will be pleased with the quality and features of this product. MODELS COVERED BY THIS MANUAL • TK-285: VHF FM Transceiver • TK-385: UHF FM Transceiver NOTICES TO THE USER i 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. 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. ATTENTION (U.S.A. Only): The RBRC Recycle seal found on KENWOOD nickel-cadmium (Ni-Cd) battery packs indicates KENWOOD’s voluntary participation in an industry program to collect and recycle Ni-Cd batteries after their operating life has expired. The RBRC program is an alternative to disposing Ni-Cd batteries with your regular refuse or in municipal waste streams, which is illegal in some areas. For information on Ni-Cd battery recycling in your area, call (toll free) 1-800-8-BATTERY (1-800-822-8837). KENWOOD’s involvement in this program is part of our commitment to preserve our environment and conserve our natural resources. ii CONTENTS UNPACKING AND CHECKING EQUIPMENT .............................. 1 Supplied Accessories ............................................................. 1 PREPARATION ............................................................................ 2 Installing/ Removing the (Optional) NiCd Battery Pack ........... 2 Installing the Antenna ............................................................. 3 Installing the Belt Clip ............................................................. 3 Installing the Cover over the Universal Connector .................. 4 Installing the (Optional KMC-25) Speaker/ Microphone .......... 4 THE BASICS ................................................................................ 5 Switching Power ON/ OFF ..................................................... 6 Adjusting the Volume .............................................................. 6 TRUNKING MODE ....................................................................... 7 Key Functions ........................................................................ 7 Programmable Auxiliary Functions ......................................... 8 Display ................................................................................... 8 Searching for a Control Channel ............................................ 9 Voice Calls ............................................................................. 9 Making a Voice Call ......................................................... 9 Receiving a Voice Call .................................................... 11 Status Calls .......................................................................... 12 Making a Status Call ...................................................... 12 Receiving a Status/Short Data Message Call ................. 13 Call Displays ........................................................................ 13 Viewing the Stack ................................................................. 14 Call Diversions ..................................................................... 14 Diverting Your Own Calls ............................................... 14 Diverting Third Party Calls ............................................. 15 CONVENTIONAL MODE ............................................................ 16 Key Functions ...................................................................... 16 Display ................................................................................. 17 Entering Conventional Mode ................................................ 17 Returning to Trunking Mode ................................................. 18 Conventional Mode Operation .............................................. 18 Scanni…

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BLOCKDIAGRAM(Bottom Left) MODEL NAME:TK-285K FCC ID:ALH29492110

BLOCKDIAGRAM(Bottom Right) MODEL NAME:TK-285K FCC ID:ALH29492110

BLOCKDIAGRAM(Top Left) MODEL NAME:TK-285K FCC ID:ALH29492110

BLOCKDIAGRAM(Top Right) MODEL NAME:TK-285K FCC ID:ALH29492110

BOTTOM VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

LEFT SIDE VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

RIGHT SIDE VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

PC BOARD FRONT VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

PC BOARD REAR VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

PC BOARD FRONT VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

PC BOARD REAR VIEW MODEL NAME:TK-285K FCC ID:ALH29492110

FCC ID:ALH29492110 TK-285 Circuit Description The KENWOOD model TK-285 is a VHF/FM hand-held transceiver designed to operate in the frequency range of 217 to 250 MHz. The unit consists of a receiver, a transmitter, a phase-locked loop (PLL) frequency synthesizer, a digital control unit, power supply circuits and a signaling unit. 1. RECEIVER CIRCUIT The receiver is double conversion super-heterodyne, designed to operate in the frequency range of 217MHz to 250MHz. 1.1 FRONT-END RF AMPLIFIER An incoming signal from the antenna is applied to an RF amplifier (Q24) after passing through a transmit/receive switching circuit (D12,D14 ,D15 and D401 are off). After the signal is amplified, the signal is filtered by a Band-shift type band-pass filter to eliminate unwanted signals before it is routed to the first mixer. 1.2 FIRST MIXER The signal from the RF amplifier is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (IC18) to become a 45.05MHz first intermediate frequency (1st IF) signal. The first IF signal is fed through two monolithic crystal filters (MCFs: XFI) to further remove spurious signals. 1.3 IF AMPLIFIER The first IF signal is amplified by Q12, and then enters IC12 (FM IC).The signal is heterodyned again with a second local oscillator signal with in IC12 to become a 455kHz second IF signal. The second IF signal is fed through a 455kHz ceramic filter , CF1 (for Wide/S-Wide), CF2 (for Narrow) to further eliminate undesired signals before it is amplified and FM detected in IC12. 1.4 AUDIO AMPLIFIER The recovered audio signal obtained from IC12 is amplified by IC13,low-pass filtered by IC13 high-pass filtered by IC13 and band-eliminate filtered by IC13. The audio signal is then passed through an audio frequency switch (Q15) and de-emphasized by IC13. The processed audio signal passes through an audio volume control and is amplified to a sufficient level to drive a loudspeaker by an audio power amplifier (IC300) display board. 1.5 SQUELCH AND MUTE CIRCUIT The output signal from the squelch circuit, which consists of IC12 and Q4, is applied to the microprocessor. The microprocessor passes information to the shift register (IC21, IC22) and it controls the mute control lines (AF MUTE and AC) according to the input signal and the microprocessor task condition. 2. TRANSMITTER 2.1 MICROPHONE CIRCUIT The signal from the microphone is high-pass filtered by IC13, passed through microphone mute circuit (Q17), limited and pre-emphasized by IC13,D8. FCC ID:ALH29492110 2.2 MODULATOR CIRCUIT The output of the low-pass filter network (IC13) is passed to the D/A converter (IC8) for maximum deviation adjustment and the summing amplifier (IC7) before being applied to a varactor diode in the voltage controlled oscillator (VCO) located in the frequency synthesizer section. 2.3 DRIVER AND FINAL POWER AMPLIFIER CIRCUITS The transmit signal is directly generated by the VCO. The transmit signal obtained from the VCO buffer amplifier Q18, is amplified by Q20, to approximately 2dBm. This amplified signal is passed to the power module (IC100). The power module consist of a 3-stage amplifier and is capable of producing up to 5W. 2.4 TRANSMIT/RECEIVE SWITCHING CIRCUIT The power module output signal is passed through a 3-stage low-pass filter network and a transmit/receive switching circuit before it is passed to the antenna terminal. The transmit/receive switching circuit is comprised of D12,D14 and D401. D12,D14 and D401 are turned on (conductive) in transmit mode and turned off (isolated) in receive mode. 2.5 AUTOMATIC POWER CONTROL CIRCUIT AND TRANSMITTER LEVEL SWITCH The automatic power control (APC) circuit stabilizes the transmitter output power at a pre-determined level by sensing the collector current of the final amplifier transistor in the power module. The voltage comparator (IC23) compares the voltage obtained by the above collector current with a reference voltage, set using the microprocessor and Q22. An APC voltage proportional to the difference between the sensed voltage and the reference voltage appears at the output of IC23. This output voltage controls Q25, which in turn controls the voltage at pin 2 of the power module, which keeps the transmitter output power constant. The transmitter output power can be varied to l W by the microprocessor, which in turn changes the reference voltage, and hence the output power. 3. PLL FREQUENCY SYNTHESIZER 3.1 PLL The frequency step of the PLL circuit is 5 or 6.25kHz. A 12.8MHz reference oscillator signal is divided at IC14 by a fixed counter to produce the 5 or 6.25kHz reference frequency. The VCO output signal is buffer amplified by Q16, then divided in IC14, by a dual-modules programmable counter in this case. The divided signal is compared in phase with the 5 or 6.25kHz reference signal in the phase comparator also in IC14. The output signal from the phase comparator is low-pass filtered and passed to the VCO to control the oscillator frequency. 3,.2 VOLTAGE CONTROLLED OSCILLATOR (VCO) The operating frequency is generated by Hybrid Integrated Circuit(HIC) in transmit mode and HIC in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator to the varactor diodes. The TX/RX pin is set high in receive mode causing IC21, and turn on. 3.3 UNLOCK DETECTOR CIRCUIT If a pulse signal appears at the LD pin of IC14, an unlock condition occurs. The voltage applied to the UL pin of the microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled by ignoring the push-to-talk switch input signal. 4. DIGITAL CONTROL CIRCUIT FCC ID:ALH29492110 4.1 KEY SWITCHES AND ROTARY ENCODER INPUT CIRCUIT The key switches and rotary encoder (channel selector) in formation are entered directly into the display microprocessor (IC19). 4.2 RESET CIRCUIT When the power is initially turned on, the reset circuit (IC3). 4.3 …

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FCC ID:ALHFCC ID:ALH29492110 TK-285 Tuning procedure Before attempting to tune the transceiver, connect the unit to a suitable power supply. Whenever the transmitter tuned, unit must be connected to a suitable dummy load, unless the instruction specify otherwise. The speaker output connector must be terminated with a 4 Ohm dummy load at any time during the tuning and connected to an AC voltmeter and an audio distortion meter or a SINAD measurement at all the time during the tuning. Power SW on during "B" push to test mode [1-1] then push "A" to tuning mode. This *** mean using 3 numbers from CHANNEL NOB. 1 Transmitter section 1.1 Frequency adjustment Set test mode CH1,Push "S" to enter tuning mode, Select [FREQ ***], then PTT on. 160.100MHz±50Hz. 1.2 TX High power adjustment Set test mode CH1,Push "S" to enter tuning mode, Select Hpow, Push "A" to 5 points. a) Select [L Hpow ***] then PTT on 4.8W±0.1W. b) Push "D" to select [L2 Hpow ***] then PTT on, push "C" after tuned. c) Push "D" to select [C Hpow ***] then PTT on, push "C" after tuned. d) Push "D" to select [H2Hpow ***] then PTT on, push "C" after tuned. e) Push "D" to select [H Hpow ***] then PTT on, push "A" to return test mode. The TX current is 2.2A or less. 1.3 TX Low power adjustment Set test mode CH1,Push "S" to enter tuning mode, Select L pow, Push "A" to 5 points. a) Select [L Lpow ***] then PTT on 1.0W±0.1W. b) Push "D" to select [L2 Lpow ***] then PTT on, push "C" after tuned. c) Push "D" to select [C Lpow ***] then PTT on, push "C" after tuned. d) Push "D" to select [H2 Lpow ***] then PTT on, push "C" after tuned. e) Push "D" to select [H Lpow ***] then PTT on, push "A" to return test mode. The TX current is 1.0A or less. 1.4 DQT BAL adjustment Set test mode CH1,Push "S" to enter tuning mode, Select [BAL ***], Push "A" to enter 3 Points, a) Select [LBAL ***] adjustments mode then PTT on Push "C" after tuned . b) Push "D" to select [C BAL ***] then PTT on push "C" after tuned. c) Push "D" to select [H BAL ***] then PTT on push "C" after tuned. Push "B" to return to tuning mode. 1.5 Max deviation adjustment Set test mode CH1, push "S" to enter tuning mode, Push "A" to 3 points adjustment mode. a) Select [L MAX ***] then PTT on push "B" after tuned. b) push "D" to select [C MAX ***] then PTT on push "C" after tuned. c) push "D" to select [H MAX ***] then PTT on push "C" after tuned Push "B" to return tuning mode. Deviation ±1.85KHz FCC ID:ALHFCC ID:ALH29492110 1.6 QT Deviation adjustment a) Push "A" to enter tuning mode select [FQT ***] push "B" to adjustment mode. Select [L FQT ***] then PTT on push "C" after tuned. Deviation ±0.35KHz b) same [C FQT ***] c) same [H FQT ***] 1.7 DQT Deviation adjustment a) Same as QT. Select [ FDQT ***] b) same as [L FDQT ***] c) same as [C FDQT ***] d) same as [H FDQT ***] Deviation ±0.35KHz 1.8 DTMF Deviation adjustment a) Select [DTMF ***] Deviation ±1.4KHz(±0.05KHz) 1.9 MSK Deviation adjustment a) Select [FMSK ***] Deviation ±1.4KHz(±0.05KHz) 1.10 TONE Deviation adjustment a) Select [DTMF ***] Deviation ±1.4KHz(±0.05KHz) 2 Receiver section 2.1 Sensitivity a) Select [SENS ***] 12dB SINAD or more. 2.2 Tight squelch adjustment a) Select [SQL ***] Adjust to point of opening squelch. 3 Reference shift low(Use KPG-36,KPG-49D) a) connect to PC and FPU cable with Radio. b) Push to "Alt" to test mode from program.[CH:No1, Signaling No:1] c) Push to PF10 to tuning mode. d) Select Reference shift Low. e) Push SPARE BAR(PTT ON) 4 Reference shift low(Use KPG-36,KPG-49D) a) Push to "Alt" to test mode from program.[CH:No1, Signaling No:1] b) Push to PF10 to tuning mode. b) Select Reference shift High. e) Push SPARE BAR(PTT ON)

SEMICONDUCTOR LIST(1-3) MODEL NAME:TK-285K FCC ID:ALH29492110

SENICONDUCTOR LIST(2-3) MODEL NAME:TK-285K FCC ID:ALH29492110

SEMICONDUCTOR LIST(3-3) MODEL NAME:TK-2885K FCC ID:ALH29492110

PARTS LIST 1-4 MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(2-4) MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(3-4) MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(4-4) MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST 1-4 MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(2-4) MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(3-4) MODEL NAME:TK-285K FCC ID:ALH29492110

PARTS LIST(4-4) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Bottom Left) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Bottom Right) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RXUNIT) (Top Left) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Top Right) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(VCO) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Bottom Left) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Bottom Right) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RXUNIT) (Top Left) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(TX-RX UNIT) (Top Right) MODEL NAME:TK-285K FCC ID:ALH29492110

CIRCUIT SCHEMATIC(VCO) MODEL NAME:TK-285K FCC ID:ALH29492110

FCC ID: ALH29492110 MFA p0040003, d0040028 Date: April 14, 2000 Federal Communications Commission Via: Electronic Filing Attention: Authorization & Evaluation Division Applicant: Kenwood Communications Corporation Equipment: TK-285-1 FCC ID: ALH29492110 FCC Rules: 90 Gentlemen: On behalf of the Applicant, enclosed please find Application Form 731, Engineering Test Report and all pertinent documentation, the whole for approval of the referenced equipment as shown. Filing fees are attached. We trust the same is in order. Should you need any further information, kindly contact the writer who is authorized to act as agent. Sincerely yours, William H. Graff, Director of Engineering enclosure(s) cc: Applicant WHG/cvr FCC ID: ALH29492110 MFA p0040003, d0040028 LIST OF EXHIBITS (FCCCERTIFICATION(TRANSMITTERS) - REVISED 9/28/98) APPLICANT: Kenwood Communications Corporation FCC ID: ALH29492110 BY APPLICANT: 1. LETTER OF AUTHORIZATION 2. IDENTIFICATION DRAWINGS, 2.1033(c)(11) LABEL LOCATION OF LABEL COMPLIANCE STATEMENT LOCATION OF COMPLIANCE STATEMENT 3. PHOTOGRAPHS, 2.1033(c)(12) 4. DOCUMENTATION: 2.1033(c) (3) USER MANUAL (9) TUNE UP INFO (10) SCHEMATIC DIAGRAM (10) CIRCUIT DESCRIPTION BLOCK DIAGRAM PARTS LIST ACTIVE DEVICES 5. PART 90.203(e) & (g) ATTESTATION BY M.F.A. INC. A. TESTIMONIAL & STATEMENT OF CERTIFICATION B. STATEMENT OF QUALIFICATIONS FCC ID: ALH29492110 MFA p0040003, d0040028 Sub-part 2.1033(c): EQUIPMENT IDENTIFICATION FCC ID: ALH29492110 NAMEPLATE DRAWING ATTACHED, EXHIBIT 1. LOCATION AS PER LABEL DRAWING(S) DATE OF REPORT April 14, 2000 SUPERVISED BY: William H. Graff, Director of Engineering FCC ID: ALH29492110 MFA p0040003, d0040028 THE APPLICANT HAS BEEN CAUTIONED AS TO THE FOLLOWING: 15.21 INFORMATION TO USER. The users manual or instruction manual for an intentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 15.27(a) SPECIAL ACCESSORIES. Equipment marketed to a consumer must be capable of complying with the necessary regulations in the configuration in which the equipment is marketed. Where special accessories, such as shielded cables and/or special connectors are required to enable an unintentional or intentional radiator to comply with the emission limits in this part, the equipment must be marketed with, i.e. shipped and sold with, those special accessories. However, in lieu of shipping or packaging the special accessories with the unintentional or intentional radiator, the responsible party may employ other methods of ensuring that the special accessories are provided to the consumer, without additional charge. Information detailing any alternative method used to supply the special accessories for a grant of equipment authorization or retained in the verification records, as appropriate. The party responsible for the equipment, as detailed in § 2.909 of this chapter, shall ensure that these special accessories are provided with the equipment. The instruction manual for such devices shall include appropriate instructions on the first page of text concerned with the installation of the device that these special accessories must be used with the device. It is the responsibility of the user to use the needed special accessories supplied with the equipment. FCC ID: ALH29492110 MFA p0040003, d0040028 TABLE OF CONTENTS RULEDESCRIPTIONPAGE . Test Report 1 2.1033(c) General Information Required 2 2.1033(c)(14) Rule Summary 5 . Standard Test Conditions and Engineering Practices 6 2.1046(a) Carrier Output Power (Conducted) 7 2.1051 Unwanted Emissions (Transmitter Conducted) 9 2.1053(a) Field Strength of Spurious Radiation 13 2.1049(c)(1) Emission Masks (Occupied Bandwidth) 16 2.1047(a) Audio Low Pass Filter (Voice Input) 21 2.1047(a) Audio Frequency Response 24 2.1047(b) Modulation Limiting 26 2.1055(a)(1) Frequency Stability (Temperature Variation) 28 2.1055(b)(1) Frequency Stability (Voltage Variation) 31 2.202(g) Necessary Bandwidth and Emission Bandwidth 32 FCC ID: ALH29492110 MFA p0040003, d0040028 PAGE NO.1of32. Required information per ISO/IEC Guide 25-1990, paragraph 13.2: a) TEST REPORT b) Laboratory: (FCC: 31040/SIT) (Canada: IC 2044) M. Flom Associates, Inc. 3356 N. San Marcos Place, Suite 107 Chandler, AZ 85224 c) Report Number: d0040028 d) Client: Kenwood Communications Corporation P.O. Box 22745 Long Beach, CA 90801-5745 e) Identification: TK-285-1 FCC ID: ALH29492110 Description: VHF FM Handheld Transceiver f) EUT Condition: Not required unless specified in individual tests. g) Report Date: April 14, 2000 EUT Received: April 3, 2000 h, j, k): As indicated in individual tests. i) Sampling method: No sampling procedure used. l) Uncertainty: In accordance with MFA internal quality manual. m) Supervised by: William H. Graff, Director of Engineering n) Results: The results presented in this report relate only to the item tested. o) Reproduction: This report must not be reproduced, except in full, without written permission from this laboratory. FCC ID: ALH29492110 MFA p0040003, d0040028 PAGE NO.2of32. LIST OF GENERAL INFORMATION REQUIRED FOR CERTIFICATION IN ACCORDANCE WITH FCC RULES AND REGULATIONS, VOLUME II, PART 2 AND TO 90 Sub-part 2.1033 (c)(1): NAME AND ADDRESS OF APPLICANT: Kenwood Communications Corporation 2201 E. Dominguez St P.O. Box 22745 Long Beach, CA 90801-5745 MANUFACTURER: Kenwood Electronics Technologies PTE Ltd. 1 Ang Mo Kio Street 63 Singapore 569110 (c)(2): FCC ID: ALH29492110 MODEL NO: TK-285-1 (c)(3): INSTRUCTION MANUAL(S): PLEASE SEE ATTACHED EXHIBITS (c)(4): TYPE OF EMISSION: 11K0F3E (c)(5): FREQUENCY RANGE, MHz : 218 to 250 (c)(6): POWER RATING, Watts: 1 to 5 Switchable x Variable N/A FCC GRANT NOTE: BF- The output power is continuously variable from the value listed above to 20%-25% of the value listed. (c)(7): MAXIMUM POWER RATING, Watts : 300 FCC ID: ALH29492110 MFA p0040003, d0040028 PAGE NO.3of32. M.…

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