KLLTP-318Family Radio Transceiver

TEKCOM Industries Limited Page 1 of 6 OWNER’S MANUAL TP-318 (US Version) September 8, 2000 INTRODUCTION Your FRS radio is a lightweight radio that you can carry almost anywhere. Use it at shopping malls, amusement parks, or sports events to contact family and friends, or in a neighborhood watch for vital communications. You can start using your FRS radio immediately without any license required! Your radio comes with 14 channels and you can talk with another person who has a FRS radio and is on the same channel and privacy code that you are using. Your radio also offers a multifunctional liquid crystal display with backlight, auto-squelch which eliminates noise between transmission, power saving, built-in modulation limiter circuit which automatically adjust the radio for a wide variety of voice levels to ensure a clear transmission, automatic shut off timer, memory retention, low battery indication and keypad lock. USING THE RADIO A. DISPLAY Your radio comes with a multifunctional backlight display. By pressing any button except the CALL and PTT, the backlight will illuminate for 7 seconds. The liquid crystal display has been enlarged to show all of the operating modes. TEKCOM Industries Limited Page 2 of 6 1. “ BUSY”: Displayed when a call is being received. 2. “VOL” : Displayed the current volume. 3. “VOX” : Displayed when the VOX is enabled. 4. “CTCSS”: Displayed when the CTCSS privacy mode is enabled. 5. “ ”: Displayed when the keypad lock has been activated. 6. “ ”: When this symbol is visible, it indicates the batteries are low. Replace the batteries after this indicator is on. 7. “ ” : Displayed when your radio is transmitting or the CALL button is pressed. 8. Shows the selected channel number. 9. Shows the selected CTCSS code number. 10. “SCAN”: Displayed when the transceiver scans through all the channels. 11. “INT”: Displayed when the intercom is enabled. B. FUNCTION AND LOCATION OF THE CONTROLS TEKCOM Industries Limited Page 3 of 6 1. CALL Button You can cause a ringer sound on all radios tuned to the same FRS channel and/or the privacy code as your radio. To send a page, press and hold down the CALL button. At this time, the speaker rings a bell, and the icon is displayed and the outer (( )) icon flashes. 2. Push-To-Talk button To talk, hold down Push-To-Talk . Speak into the microphone in a normal tone of voice when the icon is displayed. When you finish speaking, release Push-To-Talk button. 3. MON button Press this button to open the automatic squelch and allow background noise to be heard. Release MON button to turn the auto-squelch back on. In addition, MON button is also a double-function button a) MON + Power After inserting the Microphone /Speaker plug into the jack, press and hold MON button, then press POWER button to enable or disable the intercom function. b) MON + MODE Press and hold MON button, then press MODE button to enable or disable the CTCSS privacy mode operation. To determine CTCSS privacy code setting. Press and hold MON , then press MODE button for two seconds until CTCSS icon displays and the below privacy codes indicator flashes, press ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button to select the desired code among 1 and 38. Press MODE button once to confirm and exit the setting mode and your radio is now in the privacy mode operation. c) MON + ∆ ∆∆ ∆ Press and hold MON button, then press ∆ ∆∆ ∆ button to enable or disable the VOX function. To determine VOX setting, press and hold MON button, then press ∆ ∆∆ ∆ button for two seconds until VOX icon displays and the below VOX codes indicator flashes. Press ∇ ∇∇ ∇ to select the desired code among 1 and 3. W hile pressing and holding MON button, press ∆ ∆∆ ∆ button once to confirm and exit the setting mode and your radio is now in the VOX operation. 3 is the most easy to activate transmit and 1 is the most difficult to activate. d) MON + ∇ ∇∇ ∇ You can activate or deactivate the key pad lock to avoid accidental pressing of keys. Press and hold MON button, then press ∇ ∇∇ ∇ button to activate/deactivate the keypad lock. 4. LCD Display Your transceiver has a multifunctional liquid crystal display with backlight. 5. Power button You can press POWER button to turn on the unit. Pressing the button again will turn off the unit. Please take out the batters if you don't use the unit for a long time. 6. Mode button Press MODE button and display the current mode you can press ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button to obtain the comfortable volume. TEKCOM Industries Limited Page 4 of 6 7. Antenna Provides excellent reception. 8. ∆ ∆∆ ∆ button Press ∆ ∆∆ ∆ button to move one channel up. Release when you reach the desired channel. To Operate the Scan Press and hold ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button for two seconds allows the unit to begin scanning up or down through the channels. If a valid signal is present, the radio will stop on the active channel and remain stopped for 5 seconds. If no button is pressed, the scan mode will then immediately resume for the next channel after the signal disappears within 5 seconds or after 5 seconds have elapsed. If no signal is found on a channel, the unit will immediately continue to scan when no button is pressed. During scan, if ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button is pressed, the unit will exit scan mode and stop at the current displayed channel. In two cases, pressing PTT, CALL, and MON button s will cause the scan to turn off and stop at the current displayed channel. 9. ∇ ∇∇ ∇ / Automatic Shut Off Button Press ∇ ∇∇ ∇ to move one channel down. Release when you reach the desired channel. The timer automatically turns off the unit if it is idle for 2 hours. Hold ∇ ∇∇ ∇ while turning on the radio to enable or disable the timer. ON or OF (off) appears briefly. Then, if the radio is idle for 2 hours, OF appears steadily. Press any button to operate the radio again. OF disappears and the last selected channel appears. 10. External Microphone/Speaker Jack Connect a special speaker/microphone or earphone (supplied). In addition, you can rechar…

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Joe Dichoso Ref: FCC ID: KLLTP-318 Correspondence Ref. #17453 Per yo ur inq uiry: 1) Reference to .5 in the technical description section of the test report is a typo and will be corrected to read .3 W. User manual and measured .3 ERP is correct. The alignment procedure reference to .5W is not ERP but is conducted power because in quality assurance it is not practical to measure ERP on each unit. .5W conducted power translates into .3W ERP. 2) Push-to-talk devices, per Kwok Chan, duty factor inherently does not exceed 50%. Revised user instructions containing Safety Information has been uploaded via add attachments.

Front Back

PCB Front PCB Back

TEKCOM Industries Limited Page 1 of 6 THEORY OF OPERATION PJ-318 US Version 7 September, 2000 This FRS transceiver provides accurate and stable operation. The basic functions consist of 10 main sections: ! Power ! Receiver Stage ! Squelch Control ! Transmit Stage ! VCO and PLL ! Micro-controller ! CTCSS(QUIET) ! CALL ! VOX ! INTERCOM Power The unit is powered with 4.5V (3×AAA type) Alkaline battery. The power is spread into four sections. 1. The power for the low battery detect circuitry. This circuit is used to detect the battery capacity and turn on the Lo battery icon accordingly. 2. The power for the RF-power amplifier. 3. The power for the Audio amplifier section. 4. 4.5 V battery voltage is regulated to 2.8V by IC8 RN5RZ28A for the VCO & PLL power, CPU power, TX and RX power control circuitry. Q15 FMA5A compose as a power switch for VCO and TX. They are controlled by VCO and TX CTL from CPU. Q1 compose as a power switch for Rx and VOX. They are controlled by Rx and VOX CTL from CPU. For power saving purpose, Q15 and Q1 are turned on and off in a ratio of 1:3, that is 250 msec on and 750 msec off. Receive Stage RF signal is received through the antenna and is passed onto a low pass filter netw ork and amplified by Q5. This allow s only the required band signal to pass through to the band pass filter (BPF). The mixer Q6 converts the incoming signal down to 21.7MHz. This signal again passes to a 21.7MHz XTAL band pass filter F1. This gives a better channel selectivity. The selected 21.7MHz signal is amplified by IF amplifier Q4 before it is passed to the second converter IC2 MC3361. IC2 MC3361 is the second converter with a 21.25MHz local oscillator. This converts the 21.7MHz signal dow n to 450KHz. This 450KHz signal is sent to discriminator. The detected audio signal passes through Audio Amplifier, Audio Filter and volume control which are included in IC 6 CMX808, and then to the speaker. Sque lch Control Squelch control circuitry consists of IC2 MC3361 and its related circuit. The squelch signal output from IC2 pin 9 pass TEKCOM Industries Limited Page 2 of 6 through filter amplifier circuit composed by pin 10 and pin 11. The signal is amplified and detected by IC2 and generate a control voltage at pin 13 of IC2 for CPU to detect. VR1 is used to control the threshold of the squelch (squelch sensitivity). Pin 13 of IC2 is output a Hi to MCU IC5 pin 50 to indicate an incoming signal is detected. Transmit Stage When the PTT sw itch goes dow n, the transceiver is sw itched into transmit mode through the TX/RX exchange control. TX/2.8V of Q15 is turned on for the power to the transmitter. The voice is picked up by the condenser MIC and is amplified by IC4:4 NJM3403 MIC amplifier circuit. The signal modulates with the carrier in the form of FM modulation. The modulated signal from the VCO goes into the power amplifier unit which consists of a buffer amplifier Q7/B, a driver amplifier Q7/A and the RF pow er amplifier Q2. The signal then is finally radiated out through antenna. VCO and PLL PLL circuitry is composed of IC3 M64082 the high frequency PLL and VCO. The channel information from the CPU is sent to the shift register in IC3 from pin 2. A control voltage is generated through the low pass filter to the VCO from pin 8 and is used to control RF frequency from Q3. Q10 is the RX/TX exchange switch. RF signal from the VCO passes through the buffer amplifier Q9 and then is fed into PLL IC3. In receive mode, the signal is fed to the receiver first mixer Q6 to convert the received signal to 21.7MHz. In transmit mode, this signal modulations with the audio signal and is passed through to the transmit pow er amplifier unit for transmission. Microcontroller The Microcontroller UPD789405 is the main control of the whole transceiver unit. It is also used to drive the LCD to show the status of the unit. On the LCD, there is current working channel display, transmit indication, receive indication, CTCSS indication, and low battery indication. The MCU scans the keypad to detect key pressed and released, then execute the function accordingly. CTCSS(QUIET) The CTCSS consists of transmit and receive section, in CTCSS transmit, a CTCSS signal generated by IC6 CMX808 pin 18 is added to the audio and modulated for transmission. The receive section consists of a CTCSS decoder circuit which is used to separate the audio signal and a CTCSS signal for the existing of a CTCSS signal. The CTCSS signal is filtered and detected by IC6 CMX808. Then the CPU UPD789405 will determine whether the CTCSS signal is received. CALL When the CALL button is pressed, the transceiver is sw itched into transmit mode through the CPU control. IC5 UPD789405 generates a ringer audio signal. This 800/1200Hz signal is modulated for transmission. VOX The VOX function is enabled by pressing MONI+VOX, when the VOX works. The audio signal is amplified and filter by IC4 NJM3403. The amplified signal is detected through a peak detector and is transferred to DC level that can be detected by MCU, when the DC level matched with the setting level. The MCU then switches the unit into TX mode. MCU will continually monitor the VOX input when the DC level from peak detector is under the setting level the MCU will terminate the TX mode and return to RX mode in a delay of 2sec. The VOX sensitivity can be adjusted by selecting one of 1(low), 2(middle), 3(high) for emironment condition. TEKCOM Industries Limited Page 3 of 6 INTERCOM The audio signal from microphone is amplified by Q19 when intercom works, then is amplified once by IC1 NJM2070 to the speaker. ALIGNMENT PROCEDURES TEKCOM Industries Limited Page 4 of 6 Important: The FCC requires that any frequency adjustment on a radiophone must be done by authorized person, who is the holder of a current first or second class radiotelephone license. This unit has been fully aligned at the factory before shipment and does not normally require further adjustment. When necessary, however, the unit may be…

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TEKCOM Industries Limited Page 1 of 6 OWNER’S MANUAL TP-318 (US Version) September 8, 2000 SAFETY INFORMATION Your wireless hand-held portable transceiver contains a low power transmitter. When the Push-to-Talk button is pushed it sends out radio frequency (RF) signals. The device is authorized to operate at a duty factor not to exceed 50%. In August 1996, the Federal Communications Commissions (FCC) adopted RF exposure guidelines with safety levels for hand-held wireless devices. CAUTION: To maintain compliance with the FCC’s RF exposure guidelines hold the transmitter and antenna at least 2 inch (5 centimeters) from your face and speak in a normal voice, with the antenna pointed up and away from the face. If you wear the handset on your body while using the headset accessory, use only the supplied belt clip for this product and when transmitting, take it out of the belt to ensure that the antenna is at least 1 inch (2.5 centimeters) from your body. Use only the supplied antenna. Unauthorized antennas, modifications, or attachments could damage the transmitter and may violate FCC regulations. TEKCOM Industries Limited Page 2 of 6 INTRODUCTION Your FRS radio is a lightweight radio that you can carry almost anywhere. Use it at shopping malls, amusement parks, or sports events to contact family and friends, or in a neighborhood watch for vital communications. You can start using your FRS radio immediately without any license required! Your radio comes with 14 channels and you can talk with another person who has a FRS radio and is on the same channel and privacy code that you are using. Your radio also offers a multifunctional liquid crystal display with backlight, auto-squelch which eliminates noise between transmission, power saving, built-in modulation limiter circuit which automatically adjust the radio for a wide variety of voice levels to ensure a clear transmission, automatic shut off timer, memory retention, low battery indication and keypad lock. USING THE RADIO A. DISPLAY Your radio comes with a multifunctional backlight display. By pressing any button except the CALL and PTT, the backlight will illuminate for 7 seconds. The liquid crystal display has been enlarged to show all of the operating modes. 1. “ BUSY”: Displayed when a call is being received. 2. “VOL” : Displayed the current volume. 3. “VOX” : Displayed when the VOX is enabled. 4. “CTCSS”: Displayed when the CTCSS privacy mode is enabled. TEKCOM Industries Limited Page 3 of 6 5. “”: Displayed when the keypad lock has been activated. 6. “ ”: When this symbol is visible, it indicates the batteries are low. Replace the batteries after this indicator is on. 7. “ ” : Displayed when your radio is transmitting or the CALL button is pressed. 8. Shows the selected channel number. 9. Shows the selected CTCSS code number. 10. “SCAN”: Displayed when the transceiver scans through all the channels. 11. “INT”: Displayed when the intercom is enabled. B. FUNCTION AND LOCATION OF THE CONTROLS 1. CALL Button You can cause a ringer sound on all radios tuned to the same FRS channel and/or the privacy code as your radio. To send a page, press and hold down the CALL button. At this time, the speaker rings a bell, and the icon is displayed and the outer (( )) icon flashes. TEKCOM Industries Limited Page 4 of 6 2. Push-To-Talk button To talk, hold down Push-To-Talk . Speak into the microphone in a normal tone of voice when the icon is displayed. When you finish speaking, release Push-To-Talk button. 3. MON button Press this button to open the automatic squelch and allow background noise to be heard. Release MON button to turn the auto-squelch back on. In addition, MON button is also a double-function button a) MON + Power After inserting the Microphone /Speaker plug into the jack, press and hold MON button, then press POWER button to enable or disable the intercom function. b) MON + MODE Press and hold MON button, then press MODE button to enable or disable the CTCSS privacy mode operation. To determine CTCSS privacy code setting. Press and hold MON , then press MODE button for two seconds until CTCSS icon displays and the below privacy codes indicator flashes, press ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button to select the desired code among 1 and 38. Press MODE button once to confirm and exit the setting mode and your radio is now in the privacy mode operation. c) MON + ∆ ∆∆ ∆ Press and hold MON button, then press ∆ ∆∆ ∆ button to enable or disable the VOX function. To determine VOX setting, press and hold MON button, then press ∆ ∆∆ ∆ button for two seconds until VOX icon displays and the below VOX codes indicator flashes. Press ∇ ∇∇ ∇ to select the desired code among 1 and 3. W hile pressing and holding MON button, press ∆ ∆∆ ∆ button once to confirm and exit the setting mode and your radio is now in the VOX operation. 3 is the most easy to activate transmit and 1 is the most difficult to activate. d) MON + ∇ ∇∇ ∇ You can activate or deactivate the key pad lock to avoid accidental pressing of keys. Press and hold MON button, then press ∇ ∇∇ ∇ button to activate/deactivate the keypad lock. 4. LCD Display Your transceiver has a multifunctional liquid crystal display with backlight. 5. Power button You can press POWER button to turn on the unit. Pressing the button again will turn off the unit. Please take out the batters if you don't use the unit for a long time. 6. Mode button Press MODE button and display the current mode you can press ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button to obtain the comfortable volume. 7. Antenna Provides excellent reception. 8. ∆ ∆∆ ∆ button TEKCOM Industries Limited Page 5 of 6 Press ∆ ∆∆ ∆ button to move one channel up. Release when you reach the desired channel. To Operate the Scan Press and hold ∆ ∆∆ ∆ or ∇ ∇∇ ∇ button for two seconds allows the unit to begin scanning up or down through the channels. If a valid signal is present, the radio will stop on the active channel and remain stopped for 5 seconds. If no button is pressed, the scan mode will …

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ENGINEERING STATEMENT For Type Certification of Tekcom Industries Limited Model No: TP-318 FCC ID: KLLTP-318 I am an Electronics Engineer, a principal in the firm of Hyak Laboratories, Inc., Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. Hyak Laboratories, Inc. has been authorized by Tekcom Industries, Ltd., to make type certification measurements on the TP-318 transceiver. These tests made by me or under my supervision in our Springfield laboratory. Test data and documentation required by the FCC for Type Certification are included in this report. The data verifies that the above mentioned transceiver meets FCC requirements and Type Certification is requested. ______________________________ Rowland S. Johnson Dated: November 7, 2000 A. INTRODUCTION The following data are submitted in connection with this request for type certification of the TP-318 transceiver in accordance with Part 2, Subpart J of the FCC Rules. The TP-318 is a portable, battery operated, UHF, frequency modulated transceiver intended for 12.5 kHz channel family radio service applications in the 462.5625-467.7125 MHz band. It operates from a nominal 4.5 Vdc battery supply. MFR rated output power is 0.3 watts ERP. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Paragraph 2.983 of the Rules) 1. Name of applicant: Tekcom Industries, Ltd. 2. Identification of equipment: FCC ID: KLLTP-318 a. The equipment identification label is submitted as a separate exhibit. b. Photographs of the equipment are submitted as a separate exhibit. 3. Quantity production is planned. 4. Technical description: a. 11k0F3E emission b. Frequency range: 462.5625 - 467.7125 MHz. c. Operating power of transmitter is fixed at the factory at less than 0.5 W ERP. d. Maximum power permitted is 0.5 watts, and the TP-318 fully complied with that power limitation. e. The dc voltage and dc currents at final amplifier: Collector voltage: 4.4 Vdc Collector current: 0.35 A f. Function of each active semiconductor device: See Appendix 1. g. Complete schematic diagram is submitted as a separate exhibit. h. A draft instruction manual is submitted as a separate exhibit. i. The transmitter tune-up procedure is submitted as a separate exhibit. 2 B. GENERAL INFORMATION (continued) j. A description of circuits for stabilizing frequency is included in Appendix 2. k. A description of circuits and devices employed for suppression of spurious radiation and for limiting modulation is included in Appendix 3. l. Not applicable. 5. Data for 2.985 through 2.997 follow this section. C. RF Power Output (Paragraph 2.985(a) of the Rules) The TP-318 has a permanently attached built-in antenna without provisions for a coaxial connector. Therefore RF power output was calculated, see Table 1. The transmitter was tuned by the factory. TABLE 1 Operating Freq., MHz Power watts into a dipole antenna 462.5625 0.30 D. MODULATION CHARACTERISTICS 1. A curve showing frequency response of the transmitter is shown in Figure 1. Reference level was audio signal output from a Boonton 8220 modulation meter with one kHz deviation. Audio output was measured with an Audio Precision System One integrated test system. 2. Modulation limiting curves are shown in Figure 2, using a Boonton 8220 modulation meter. Signal level was established with a Audio Precision System One integrated test system. The curves show compliance with paragraphs 2.987(b). 3. Figure 3 is a graph of the post-limiter low pass filter which provides a roll-off of 60Logf/3 dB where f is audio frequency in kHz. Measurements were made following EIA RS-152B with an Audio Precision System One integrated test system on the Boonton 8220 modulation meter audio output. 3 4. Occupied Bandwidth (Paragraphs 2.989(c) of the Rules) Figure 4 is a plot of the sideband envelope of the transmitter output taken with a Tektronix 494P spectrum analyzer. Modulation corresponded to conditions of 2.989(c)(1) and consisted of 2500 Hz tone at an input level 16 dB greater than that necessary to produce 50% modulation at 2590 Hz, the frequency of maximum response. Emission designator: (2M + 2D) (2 x 3 kHz) + (2 x 2.5 kHz) = 11k0F3E 4 FIGURE 1 MODULATION FREQUENCY RESPONSE MODULATION FREQUENCY RESPONSE FCC ID: KLLTP-318 FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: KLLTP-318 FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: KLLTP-318 FIGURE 3 7 FIGURE 4 OCCUPIED BANDWIDTH ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency more than 50% up to and including 100% of the 25 authorized bandwidth, 12.5 kHz (6.25-12.5 kHz) On any frequency more than 100%, up to and including 250% of the 35 authorized bandwidth (12.5-31.25 kHz) On any frequency removed from the assigned frequency by more 43+10LogP = 38 than 250% of the authorized (P = 0.30) bandwidth (over 31.25 kHz) OCCUPIED BANDWIDTH FCC ID: KLLTP-318 FIGURE 4 8 D. MODULATION CHARACTERISTICS (Continued) The plots are within FCC limits. The horizontal scale frequency) is 10 kHz per division and the vertical scale amplitude) is a logarithmic presentation equal to 10 dB per division. E. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS (Paragraph 2.991 of the Rules) The TP-318 has a permanently attached antenna. There is no connector for an external antenna. Therefore, no antenna terminal conducted measurements were made. F. DESCRIPTION OF RADIATED SPURIOUS MEASUREMENT FACILITIES A description of the Hyak Laboratories’ radiation test facility is a matter of record with the FCC. The facility was accepted for radiation measurements from 25 to 1000 MHz on October 1, 1976 and is currently listed as an accepted site. G. FIELD STRENGTH MEASUREMENTS OF SPURIOUS RADIATION Field intensity measurements of radiated spurious emissions from the TP-318 were made with a Tektronix 494P spectrum analyzer using Singer DM-105 for the measurements to 1 GHz, and EMCO 3115 horn…

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