PXBKFR-100Family Radio Transceiver

13. USER’S MANUAL Safety Information For FRS UNIT Your wireless handheld portable transceiver contains a low power transmitter. When the Push-to Talk (PTT) button is pushed it sends out radio frequency (RF) signals. This device is authorized to operate at a duty factor not to exceed 50%. In August 1996, the Federal Communications Commission (FCC) adopted RF exposure guidelines with safety levels for hand-held wireless devices. Important Note: To maintain compliance with the FCC’s RF exposure guidelines, hold the transmitter and antenna at least 1 inch (2.5 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 manufacturers supplied belt clip for this product and ensure that the antenna is at least 1 inch (2.5 centimeters) from your body when transmitting. Use only the supplied antenna. Unauthorized antennas, modifications, or attach- ments could damage the transmitter and may violate FCC regulations. 13.1 Key Name FUNCTIONS AND CONTROLS 1) Top Cover 2) Bottom Cover 3) Battery Cover 4) Belt Clip 5) Lock Knob 6) Volume Knob 7) LCD Window 8) Up Botton 9) Down Botton 10) Menu Botton 11) Call Botton 12) Ear Mic/Spk Cap 13) Speaker 14) Mic 15) Charger Cap 16) Antenna 17) PTT Botton 18) Monitor Botton 13.2 ICONS on LCD 1) CTCSS Indicator Blinks digits right side when CTCSS code selected up/dn key, and confirm by PTT key. 2) Auto Channel Scan Indicator icon appears in the auto scan mode or when the auto scan mode is activated. 3) Lock Indicator icon lock selection mode or when the call key long pressed. 4) VOX Indicator icon blinks in VOX selection mode or appears when VOX is activated. 5) Battery Level Indicator Battery Level Meter indicates the remaining battery strength. 6) Tx Indicator icon appears when a signal is being transmitted. 8) Rx Indicator icon appears when a signal is being received. 9) Left side Segment Display Indicates the channel number in use at the normal mode. when the Function Button is pressed, it displays the function menu in sequence: FM radio CH / CTC / VOX / TOT 13) Right side Segment Display Displays the CTCSS tone option at the normal mode. Displays the SUBMENU of each MENU in the function mode. (e.g. CH 1~38 / UO: On,OF / TOT: On,OF / FM radio Vol LVL0~7 / CAL number:1~5) 13.3 Key Function 13.3-1 Power Volume on/off 1) Clockwise - Power On - To turn the unit on. A short confirming melody will play. 2) Counterclockwise - Power Off - To turn the unit off. 13.3-2 Mode button Short Touch :Press this button briefly to enter function edit mode in standby mode. Long Touch :Auto Channel SCAN This feature allows you to scan for an active channel and communicate with the party transmitting. To access the Auto Channel Scan, - Press the Mode Button until the auto channel icon blinks and SC appears in the LCD Panel. - Press the Up Button or the Down Button to choose scanning up or down from the current channel number. - Press the PTT button to confirm your selection. - The unit will begin scanning for an active main channel. If a transmission is detected, the Rx will appear on the LCD Panel. - To turn off the auto channel scan feature in the standby mode, simply press the Function button once. 13.3-3 UP button - In the standby mode, press this button briefly to move to the next higher main or sub channel. In the function edit mode, press briefly to shift from the current option in each submenu to the next option in the same submenu. - Pressing this button for radio mode will allow you to volume level in the standby of radio mode or through different menus in the function edit mode. 13.3-4 DOWN button - In the standby mode, press this button briefly to move to the previous lower main or sub channel. In the function edit mode, press briefly to shift from the current option in each submenu to the previous option in the same submenu. - Pressing this button for radio mode will allow you to volume level in the standby of radio mode or through different menus in the function edit mode. 13.3-5 Push-to-Talk (PTT) button - Press it firmly and speak into the Built-in Microphone to transmit. The red Tx icon on the LCD Panel will appears. - Release it to revert to standby mode. When an incoming call is received, the Rx icon on the LCD Panel will appears. 13.3-6 Monitor button - Press it to check activity on the current channel before you try to transmit. - Adjust the Volume Control if necessary. - When you press the monitor button shortly, the LCD Panel will be illuminated with a green color back-light. - and if you want to hear low signal, press 1 second more and then you can heard the signal during press monitor button and RX icon will appears. 13.3-7 Call button - Call Ringer :Press the CALL Button to call another party on the same channel. TX icon will appear on the display. The user selected 5 call ringers melody will play. - Key Lock :This feature prevents accidental channel change and disturbance to the preferred preferred settings of the communicator. Key Lock temporarily disables the call key pressed 2 seconds. To access the Key Lock Selection menu, - Press the call key until the auto lock icon appears on the LCD panel. - To disable lock function press 2 seconds again. 13.3-8 External Mic/Speaker - This jack accepts an optional headset/microphone for totally handsfree operation. Please refer to the enclosed accessory order form to order accessories. See also section regarding VOX SELECTION MODE. 13.4 Setting and Operation 13.4-1 Basic Channel Selection In order to communicate with other FRS units, both you and the receiving party must be on the same channel. KFR-100 has 14 channels as indicated by the left side digits in the LCD Display Panel. Before, trying to ransmit 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 …

Text truncated - open the document above for the full version.

5. DESCRIPTION OF RADIO CIRCUIT 5.1 Frequency synthesizer Frequency synthesizer consists of VCO, PLL IC(built in PRESCALER) and loop filter. a) VCO VCO is composed of ONE VCO. Oscillation circuit takes colpitts circuit using variable Diode. And VCO is composed of D202,Q202,C206,C207,C204,L203. VCO control voltage through loop filter adjusts frequency and Microphone signal through Modulation terminal makes modulation. b) PLL IC PLL IC 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, PLL IC enables by strobe line of CPU. c) Loop Filter Loop filter is composed of R221,R220,C240,C238,C237 and changes pulse from pin14 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. 2nd 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(L307,L308,L309,C309,C310,C311) and receiver resonance circuit composed of L310,C101. When transmitting, voltage through R307,L306,D302 supplies D303 of receive input is short and TX is on condition. When PIN diode is off in condition of RX , L310 and C101 resonate serially and make impedance matching at receiver front-end. b) Front End Front-End has Q101 to provide a high sensitivity and low noise feature. It employs Saw filter as band pass filter to eliminate image frequency frequency and produce enough pass band by Q101 input and output. c) Mixer Mixer has one base 2SC4901(Q102) to feature high low noise quality. It has RF signal through L310,front-amp and Q203 RF signal from Local oscillator mixed. It develops 1'st IF ,21.7MHz. 1st IF goes to 1st IF amplifier Q103(KTC3880S) base through X-tal filter CF102. IF of mixing signals is selected and taken into X-tal filter. Output impedance of mixer is direct matched with input impedance of X-tal filter. Mtching of filter satisfies pass bandwidth of filter, ripple elimination with in pass band, and attenuation characteristic of stop band. X-tal filter is composed of two pole monolithic X-tal filter, 8kHz of IF bandwidth R113 is used as impedance matching with 1'st IF Amp Q103. d) IF AMP and Detection 1'st IF AMP Q103 supplies IF(IC101) mixer input pin16 through output resistor R115 and C120 to need gain in insertion loss of X-tal filter and last stage circuit. Multi-use IF IC makes up of mixer IF AMP. pin1 2'nd local frequency enter to pin 1. It supplies mixer of internal IC. Mixer output of IC through pin3 passes 450KHz ceramic filter, supplies 2'nd IF amplifier and limits. After 2'nd IF AMP has a process of enough gain and AM rejection, it comes to quadrature detection. Demodulated audio signal by L108(Quad Coil) is amplified and comes out to pin9. Detected audio signal through R140, VR101 and input in audio amp. IC103 through C156. e) Squelch Circuit Noise component of detected outputs has amplification. Squelch threshold is controlled by Resistor R121,C128,R122,RV101. f) Audio Amplifier Demodulated audio signal enters to pin2 of IC103. After above signal amplies in IC103 pin5 through C156. It comes out to pin5 Then, It reaches at speaker. 5.3 Transmitter When TX develops with pressing PTT switch, VCO output amplifies through Q301~Q304 transmits by antenna through low pass filter. TX RF signal produced from TX VCO is amplified by RF amplifier Q301 through C303 and entered Q302~4 parallel POWER TR input terminal with final amplification. After this stage, the signal is emitted at antenna through 50matching circuit to circuit to low pass filter (L307~9,C309~311) to eliminate harmonic. 5.3-1 Audio Modulation and Audio Amplification Audio signal produced by external or internal microphone, limits amplification by IC503. It enters to VCO through low pass filter. Max. Frequency modulation deviation is adjusted by RV201 keeps noise and audio from entering to VCO at time of TX. Audio modulation and Audio Amplification has characteristic of 6dB/OCT pre-emphasis by IC503(IL324V).

Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: Table of Contents TABLE OF CONTENTS LIST APPLICANT: KTC TELECOM CO., LTD. FCC ID: PXBKFR-100 TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CONTINUED & RF POWER OUTPUT PAGE 3......AUDIO RESPONSE GRAPH PAGE 4-5....MODULATION LIMITING GRAPHS PAGE 6......AUDIO LOW PASS FILTER GRAPH PAGE 7-8....OCCUPIED BANDWIDTH PLOTS PAGE 9......METHOD OF MEASURING OCCUPIED BANDWIDTH PAGE 10.....FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 11.....METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 12.....FREQUENCY STABILITY PAGE 13.....LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE EXHIBIT 2.........SKETCH OF FCC ID LABEL LOCATION EXHIBIT 3A........EXTERNAL PHOTO - FRONT VIEW EXHIBIT 3B........EXTERNAL PHOTO - TOP VIEW EXHIBIT 3C........EXTERNAL PHOTO - BOTTOM EXHIBIT 3D-3E.....EXTERNAL PHOTO - SIDE VIEW EXHIBIT 3F........EXTERNAL PHOTO - REAR VIEW EXHIBIT 3G-3H.....INTERNAL PHOTO - SOLDER SIDE EXHIBIT 3I-3J.....INTERNAL PHOTO - COMPONENT SIDE EXHIBIT 4.........BLOCK DIAGRAM EXHIBIT 5.........SCHEMATIC EXHIBIT 6A-6G.....USER'S MANUAL EXHIBIT 7A-7C.....CIRCUIT DESCRIPTION EXHIBIT 8.........TEST SETUP PHOTOGRAPH Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 1 of 13 GENERAL_INFORMATION_REQUIRED FOR_TYPE_ACCEPTANCE 2.1033(c)(1)(2)KTC TELECOM CO., LTD.will manufacture the FCCID: PXBKFR-100 FAMILY RADIO SERVICES 14 CHANNEL TRANSCEIVER in quantity, for use under FCC RULES PART 95. The UUT is a PTT Radio with a maximum duty cycle of 50%. KTC TELECOM CO., LTD. JUAN INDUSTRIAL COMPLEX #140, 17-1 JUAN-DONG NAM-KU INCHEON, KOREA 2.1033 (c) TECHNICAL_DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 6A-6J. 2.1033(c) (4) Type of Emission: 10K6F3E 95.631 Bn = 2M + 2DK M = 3000 D = 2.0K Bn = 2(3.0)+2(2.3) = 10.6K Authorized Bandwidth 12.5KHz 2.1033(c)(5) 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 2.1033(c)(6)(7) Power Output shall not exceed 0.500Watts effective 95.639 radiated power. There can be no provisions for 95.649 increasing the power or varing the power. The Maximum Output Power Rating: 300 milliWatts effective radiated power. 95.647 The antenna is an intergral part to the unit, it cannot be removed without rendering the unit inoperative. In order to remove the antenna the case must unscrewed, then the PCB assemblies must be removed then the antenna can be removed. 2.1033(c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY Vce = 6.0 Volts DC Ice = 0.25A. Pin = 1.5 Watts Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 2 of 13 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included in the IN USER'S MANUAL. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 5 of this report. The block diagram is included as EXHIBIT 4 of this report. 2.1033(c)(11) A photograph or a drawing of the equipment identifica tion label is included as exhibit No. 2. 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 EXHIBIT 3A-3J. 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. 2.1046(a) RF_power_output. 95.639 RF power is measured by measuring the radiated power at 3 meters and then replacing the transmitter with a signal generator to determine the effective radiated power. The ERP shall not exceed 0.500 Watts. MEASURED POWER OUTPUT = 300 milliWatts ERP R.F. POWER OUTPUT TEST SET UP HP Spectrum Analyzer TRANSMITTER UNDER TEST WITH INTERNAL ANTENNA <-- 3.0 meters--> SIGNAL DIPOLE Tuned, Calibrated GENERATOR ANTENNA Antenna which may be raised from 1 to 4 meters above ground and changed in polarization Equipment placed 80cm above ground on a rotatable platform. Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 3 of 13 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 below. 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. KTC Telecom Co. LTD. KFR-100 -55 -53 -51 -49 -47 -45 -43 -41 -39 -37 -35 100100010000 Frequency dBmV audio response Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 4 of 13 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 shown in the following pages. Curves are provided for audio input frequencies of 300, 1000, and 3000 Hz. Modulation Limiting KTC Telecom Co., Ltd. KFR-100 0 500 1000 1500 2000 -50-40-30-20 dBmV Deviation 300 Hz Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 5 of 13 Modulation Limiting KTC Telecom Co., Ltd. KFR-100 0 500 1000 1500 2000 -60-50-40-30-20 dBmV Deviation 1000 Hz Modulation Limiting KTC Telecom Co., Ltd. KFR-100 0 500 1000 1500 2000 -70-60-50-40-30 dBmV Deviation 3000 Hz Applicant: KTC Telecom Co., Ltd. FCC ID: PXBKFR-100 Report #: T:\K\KTCTELE\913ZAK1\913ZAK1TestReport.doc Page #: 6 of 13 95.637(b) Post Limiter Filter The filter must be between the mod…

Text truncated - open the document above for the full version.