QL2GMRSXGM950FRS/GMRS

SPECIAL FEATURES CONGRATULATIONS! You now own a quality XACT TM Communication product. If you follow the set-up, operation and care instructions in this Owner’s Manual, this unit will provide you with years of trouble-free service. XACT is committed to providing quality products that fit your needs. Please send us your com- ments and suggestions. Mail them to: XACT Communication, LLC 105 Madison Avenue New York, NY 10016 The XGM-950 is the newest generation in personal two-way communications. It’s a lightweight, compact two-way communication device that can be used to stay connected with family or friends at parks, shopping malls, sporting events, concerts – virtually any indoor or outdoor activity. Here are some of its excellent features: •22 FRS/GMRS Channels •38 CTCSS Codes •Roger Beep Tone •Up to 10 Mile Range •Auto Squelch •Auto Battery Saving •Internal VOX •Channel Scan •Monitor Function •TX Power Hi/Lo Selection •Backlit LCD Screen •Ni-MH Battery Power Source NOTE Maximum range varies based on terrain and environment. It will generally be greater in open fields and shorter within and around buildings or large structures. Bear in mind, this unit may not ensure privacy of communication. Read this Owner’s Manual carefully to get the most out of your TWO-WAY COMMUNICATOR. COMMUNICATOR CONTROLS LCD SCREEN 1. Channel Number (1~22) – Changes from 1-22 as selected by user. 2. Transmit Indicator (TX) – Indicates unit is transmitting a signal. 3. Receive Indicator (RX) – Indicates unit is receiving a transmission. 4. Power HI/LO Indicator – Indicates the current TX Power setting. 5. CTCSS Code Number (oF~38) – Changes from oF-38 as selected by user. 6.Battery Level indicator - Indicates the battery is low. 7. VOX – Displays during VOX mode. 8.KEY LOCK Indicator BUTTONS and CONTROLS 9.POWER/MODE (Multi Function Button) – Press and hold to turn unit ON/OFF. A quick, single press accesses the Menu and Watch mode. 10. TALK (Multi Function Button) – Press and hold to transmit voice communication. Press twice quickly to transmit CALL tone. 11. UP s s Button – Adjusts volume level (default), and makes channel and watch adjustments in MENU mode. 12. DOWN tt Button – Adjusts volume level (default), and makes channel and watch adjustments in MENU mode. 13. SCAN Button – Press to enter CHANNEL SCAN mode. Press and hold to set KEY LOCK ON/OFF. 14. MIC – Built-in microphone. 15. SPEAKER – Built-in speaker. 16. ANTENNA. 17. HEADSET/ CHARGER (BATTERY CHARGE) JACK. 18. BATTERY COMPARTMENT COVER. 19. MONITOR Button - Press and hold to enter MONITOR mode. Press to start LCD Backlighting. 7 8 6 2 5 4 3 1 12 10 15 14 19 14 18 16 2 9 17 13 10 11 FCC NOTICE This device complies with Part 15 of the FCC Regulations. Operation is subject to the following conditions: lThis device may not cause harmful interference. lThis device must accept any interference received, including interference that may cause undesired operation. IMPORTANT:Changes or modifications to this unit not expressly approved by XACT TM Productscould void your right to operate this unit. Your COMMUNICATOR is set up to transmit a regulated signal on an assigned frequency. It is against the law to alter or adjust the settings inside the COMMUNICATOR to exceed those limitations. Any adjustment to your COMMUNICATOR must be made by qualified technicians. SAFETY INFORMATION lNever open your COMMUNICATOR’s case. lNever change or replace anything in your COMMUNICATOR except the battery. Your COMMUNICATOR may interfere with TVs or radios, even when operating properly. To determine whether your COMMUNICATOR is causing interference, simply turn it off. If the interference ends, your COMMUNICATOR is causing it. Try to eliminate interference by moving your COMMUNICATOR away from the receiver. If you cannot eliminate interference completely, the FCC requires that you terminate COMMUNICATOR use. Electr omagnetic Interference/Compatibility:Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately shielded, designed, or otherwise configured for electromagnetic compatibility. lTurn your unit OFF in any facilities where posted notices instruct you to do so. Hospitals or health care facilities may be using equipment that is sensitive to external RF energy. lTurn your unit OFF when on board an aircraft when instructed to do so. Any use of the unit must be in accordance with airline regulations or crew instructions. Hazardous Environments:Do not operate the COMMUNICATOR in hazardous environments, explosion or fire may result. Do not operate the COMMUNICATOR near unshielded electrical blasting caps. Under certain conditions, COMMUNICATORS can interfere with blasting operations and may cause an explosion. Turn your COMMUNICATOR to the OFF position to prevent accidental transmission when in a blasting area or in areas posted: "Turn off two-way radios." Construction crews often use remote control RF devices to set off explosives. 3 FCC NOTICE SAFETY INFORMATION NOTE:Areas with potentially explosive atmospheres are often, but not always, clearly marked. They include fueling areas such as below deck on boats; fuel or chemical transfer or storage facilities; areas where the air contains chemicals or particles, such as grain, dust, or metal powders; and any other area where you would normally be advised to turn off your vehicle engine. Your wireless hand-held portable transceiver contains a low power transmitter. When the TALK 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: To maintain compliance with the FCC's RF exposure guidelines, hold the transmitter and ANTENNA at least 2 inches (5 centimeters) from your face and speak in a normal voice, with the ANTENNA pointed away from the face. Use only the su…

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XGM950 TECHNICAL DESCRIPTION Page 1 A). GENERAL DESCRIPTION The XGM950 GMRS radio is a self-contained transceiver unit with integral antenna intended for use as a general communication tool. It is designed to operate on all 22 channels allocated by the FCC. This model also features user selectable sub-audible tones for channel quieting. The useable range, while dependent upon terrain and other radio propagation principles, is typically two miles. The XGM950 uses the maximum transmit power allowed to help ensure the maximum communication range. Features include: 22 GMRS Channels, Digital Receive Volume Control, Channel Monitor, Page and LCD Display. The unit is equipped with an external Headset option connector. Four AA alkaline batteries that are readily available in retail outlets supply operating power. An automatic power savings feature allows the typical standby battery life to extend to more than 10 days. B). FREQUENCY DETERMINING CIRCUITS The fundamental frequency for both the transmitter and the receiver local oscillators are controlled by a phase lock loop (PLL) circuit IC201 (Toshiba TB31202, or equipvalent). The frequency of operation of the FRS voltage controlled oscillator (VCO), composed of Q301 and Q302 operating in cascade is phase locked to a voltage controlled crystal reference (VCXO) operating at 20.95MHz (X202). The VCO is locked to the fundamental of the transmit signal in the transmit mode and is locked to the receive 1 st LO (Fundamental channel frequency minus 21.4MHz) in the receive mode. The crystal reference frequency is shared with the 2 nd LO of 20.95MHz. C). TRANSMITTER CIRCUITS The transmitter amplifies the 0 dBm signal from the VCO to approximately 27dBm that is fed to the antenna. The transmitter is a three stage amplifier composed of Q1,3,4 and Q11. The first two stages are operated class A and the final is operated class B in full saturation to help prevent unwanted amplitude modulation. The fundamental transmit signal is fed through an elliptical low pass filter (5-pole, 2 zero) in order to suppress the harmonics to below –50 dBc. The desired frequency modulation of the carrier is accomplished by modulating the current in the VCO directly with the microphone audio signal. The microphone audio is conditioned with a three- pole high pass filter at 300 Hz (IC5A,B), a hard clipper circuit (IC5D) to limit maximum deviation to +/- 2.5 kHz and a three-pole low pass or splatter filter at XGM950 TECHNICAL DESCRIPTION Page 2 2.8 kHz (IC5C). The low pass filter insures that the occupied bandwidth of the FM modulated signal meets FCC requirements under all input conditions. D). RECEIVER CIRCUITS The received signal from the antenna is band limited to 600 Mhz by the transmitter harmonic filter. The desired signal is fed to a low noise amplifier (LNA – Q6) centered from 460 to 470 MHz that provides approximately 10 dB of gain. The output of the LNA is filtered with a Band Pass filter (C41,L16,C43,L17,C15,L5) with pass-band of 460 to 470 MHz and stopband attenuation of 10 dB. The filtered receive signal is one input to the 1 st mixer (Q8), the other mixer input (1 st LO) is the output of the VCO at the desired channel frequency minus 21.4MHz. The output of the mixer is tuned to the 1 st IF of 21.4 MHz. The 1 st IF is transformer coupled for impedance matching to a X-tal filter centered at 21.4MHz with a bandwidth of +/-3.75Hz. The filtered 1 st IF is then amplified by Q9 and fed to the 2 nd mixer input of the multi-function receiver IC (IC1). The 2 nd LO (20.95 MHz) is generated by VCXO that is the reference frequency for the PLL. The 2 nd mixer output of 450 kHz is filtered through a 4 section ceramic filter that in combination with the 21.4MHz X-tal filter provides approximately 50 dB of adjacent channel attenuation. The 450 kHz 2 nd IF is then amplified, limited and fed to a quadrature detector for FM demodulation. The resulting audio output signal is bandpass filtered from 300 to 3 kHz (Q22) and amplified to provide 150mW of audio power (IC2). A squelch circuit is provided (IC1 pins 10 through 11) to mute the receiver noise under low signal conditions. The squelch circuit amplifies and detects noise in a narrow bandwidth at approximately 5 kHz. When the detected noise exceeds a threshold set to trigger at approximately 9 dB SINAD receive signal strength, the audio output is muted. E). TRANSMIT/RECEIVE SWITCH When the radio is in the transmit mode, pin diode switches D13 and D1 are both turned on (representing less than 0.7 ohms). D13 allows the transmit signal to pass to the antenna and D1 shorts one leg of a T matching network (L3, L15 and C4) to ground in the receive path. This results in a parallel tuned circuit high impedance being presented to the transmit signal so that the receive path does not load the transmit signal. In the receive mode, both D13 and D1 are off, resulting in the antenna signal being coupled into the receive LNA through the 50 ohm T matching network and the unwanted load of the transmit final amplifier is reduced to less than 1 pF by D1. F). RADIO CONTROL CIRCUIT A microprocessor (CPU1) is used to control the transceiver. User stimuli is provided through a tack switch for PTT (push to talk), along with the keypad for channel selection, channel monitor, receive volume, and page. Pressing XGM950 TECHNICAL DESCRIPTION Page 3 the PTT switch instructs CPU1 to switch to the transmit mode. This is accomplished by loading the proper channel counter information through a 3- wire serial link to the PLL IC (IC201), turning on power to the PLL and VCO, microphone and transmit audio circuits and the transmit RF amplifiers. Pressing the call switch causes the microcontroller to transmit a warbling tone for approximately 3 seconds on the current channel selected that is used to notify another person with FRS radio that you wish to communicate. Pressing the channel Up/Down buttons (active in receive mode only) instructs CPU1 to increment or decrement res…

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XGM950 SEMICONDUCTOR DESIGNATIONS AND FUNCTIONS Page 1 Designator Description Application CPU1 W741S81A Micro controller D1 KDS114E TX,RX switch D3 KDS114E Squelch temperature compensation D4 KDS160 TX PA temperature compensation D5 KDS114E VOX rectifier D13 KDS114E TX,RX switch D201 KDS114E Reset for micro controller D301 KDS114E VCO TX,RX switch D6 KDS113E VCO Vcc switch IC1 DBL5018 IF IC IC2 LM386 Speaker amplifier IC201 TB31202 PLL IC IC3 XC6201 4V regulator IC4 LM324 OP amp. IC5 LM324 OP amp. LED1 SML210MT LED for backlit Q1 NE5510279A TX PA Q3 BFQ67W TX driver Q4 BFQ67W TX driver Q5 KRC404E CTCSS Limitor Q6 2SC4226 RX LNA Q7 KTA2014E PTT switch Q8 2SC4226 RX MIXER Q9 2SC4083 IFA Q10 KRA306E VCO Vcc switch Q11 BFQ67W TX pre-driver Q12 KRC404E Speaker amplifier Vcc switch Q13 KRA226 TX Vcc switch Q14 KRA306E RX Vcc switch Q16 KRA226 Speaker amplifier Vcc switch Q17 KRC405E TX audio Mute Q18 KRA226 Main Vcc switch Q19 KRC401E VCO TX,RX switch Q21 KRC404E VOX amplifier Q22 KRC4075E Audio amplifier Q23 KRC405E RX audio mute Q301 2SC4226 VCO Q302 2SC4226 VCO

XGM950 LABORATORY TESTING PROCEDURES Page 1 UNIT TEST - (UNIT ASSEMBLED) TEST PREPARATION 1) Install 4 “AA” alkaline batteries (observe polarity markings). z Left top terminal is the system minus polarity z Right bottom terminal is the system plus polarity. 2) Turn on unit by pressing the power button. SYSTEM TEST 1) Radiated Transmit and Receive performance may be observed. 2) Audio out & Audio in are available at the Headset jack. LABORATORY TEST - (UNIT UN-ASSEMBLED) TEST PREPARATION 1) Disassemble unit (6 screws – 4 behind batteries). Remove the PCB from the cabinet. 2) Remove the antenna and install a 50 ohm coax cable in its place. 3) Either clip alligator leads or solder test leads to the power supply connections. The positive terminal is the lower left PCB mounting hole. The negative terminal is the lower right PCB mounting hole below the VCO shield can. (battery side view) 4) Connect 6VDC power source to the terminals, observing correct polarity. 5) Connect an 8-ohm load through the Headset jack (right connection of 3.5mm stereo- phone plug). 6) Connect a audio generator with 10uF coupling capacitor through the Headset jack (left connection of 3.5mm stereo-phone plug). 7) Select desired channel 1- 22 using CH up/down keypad switch. The rubber keypad may be removed from the front cabinet and used directly on the PCB. XGM950 LABORATORY TESTING PROCEDURES Page 2 SPECIFIC TEST METHODS AND GUIDANCE Modulation Characteristics – (paragraph 2.1047(a) of the Rules) FOR TX AUDIO FILTER RESPONSE 1. Connect audio generator with 10uF coupling capacitor to microphone input jack. Press PTT button. 2. Connect RF output with modulation meter. (Filters of modulation meter should be set to a 25Hz to 15KHz.) 3. Adjust audio generator about 4-5mVrms for 0.75KHz modulation. 4. While transmitting, sweep generator and note measurement. 5. Please compensate the back-ground noise level. Modulation Characteristics – (paragraph 2.1047(b) of the Rules FOR TX AUDIO LOW PASS FILTER RESPONSE. 1. Connect audio generator with 10uF coupling capacitor to microphone input jack. Press PTT button. 2. Connect AC voltmeter or other test equipment via jumper wire to TP-9. 3. Adjust audio generator for 200mV. 4. While transmitting, sweep generator and note measurement. Occupied Bandwidth – (paragraph 2.1049(c) of the Rules) 1. Connect an audio frequency sweep generator with 10uF coupling capacitor to microphone input jack. 2. Adjust audio generator to a frequency of 2500Hz and a level of 100mV rms (+16dB above 10-12mV per FCC). 3. With a spectrum analyzer, transmit the radio and monitor the transmitter though an antenna. 4. Note required measuements per FCC. XGM950 TX AUDIO TEST RESULT Page 1 Frequency Response of Audio Low Pass Filter (150mV input) 3K 4K 5K 6K 7K 8K 9K 10K 15K 20K #1 0 -8.90 -15.80 -21.10 -25.30 -28. 90 -32.00 -34.50 -45.40 -52.1 #2 0 -9.00 -15.90 -21.20 -25.30 -28. 90 -31.90 -34.50 -45.20 -50.2 XGM950 ALIGNMENT PROCEDURE Page 1 1. REFERENCE TEST EQUIPMENT A. HP8921A Cell site test set or HP8920A, B Communication Test Set with Spectrum Analyzer option. B. Fluke 187 Digital Voltmeter C. HP E3615A Power supply 2. TEST POINT A. ANTENNA : Test point is not prepared. Use antenna contact with Antenna ground. B. VCO reference voltage : Test point 1 is prepared. C. RX audio output : Test point (J24) is prepared or use ear-jack(3.5mm). D. TX Mic. Input : Test point (MIC IN) is prepared or use ear-jack(3.5mm) with 10uF coupling capacitor. E. Battery Vcc : Test point is not prepared. Please use mechanical contact. It is posited on bottom left corner of PCB. F. Up Key : Test point (UP) is prepared. G. Down Key : Test point (DOWN) is prepared. H. Function/Power Key : Test point (POWER) is prepared. I. Monitor Key : Test point (MONITOR) is prepared. J. PTT Key : Test point (PTT) is prepared. K. SCAN Key : Test point (SCAN) is prepared. Note. : All key can be activated when connect with ground. 3. VCO ALIGNMENT A. Set unit to Channel 1 and connect a voltmeter to TP1 (VCO PD). B. Press & hold PTT. C. Extend L303 until the voltmeter reads 3.0V. D. Put shield-can on VCO area and monitor the voltage on TP1. The voltage should be 1.2Vdc +/-0.2Vdc. If the voltage is not 1.2Vdc +/-0.2Vdc, realign L303 until meet to requirement. E. Release PTT button so units is in receiving mode and monitor the voltage on TP1. The voltage should be in the range 1.0Vdc +/-0.5V F. Set unit to channel 14. 6. Press & hold the PTT switch and observe the voltage on TP4. The voltage should be 2 – 3,5 Vdc. 7. Release PTT and observe the voltage on TP4. The voltage should read between 2.0 - 3.5 Vdc. Note : VCO shield-can should be soldered after VCO alignment is finished. 4. TRANSMITTER FREQUENCY ALIGNMENT A. Press & hold the PTT button. B. Align CT201 trimmer capacitor such that the output frequency is equal to the channel frequency with a maximum error of +/- 200 Hz. CT201 is located on the right side of 20.95MHz X-tal. XGM950 ALIGNMENT PROCEDURE Page 2 5. TRANSMITTER OUTPUT POWER CONFIRMATION A. Set unit to channel 1 and power Hi mode. B. Press & hold the PTT button. C. Transmit power should normally be between 3.7W to 4,5W. D. Set unit to channel 14. E. Press & hold the PTT button. Ensure that Tx Power should be between 0.3-0.6W. 6. TRANSMITTER DEVIATION ALIGNMENT A. Connect an audio generator (600 ohms) to the ear jack. The audio frequency should be set at 1KHz with a level of 200mV RMS. B. Connect an FM deviation meter (communications test set) to Antenna contact. Set the monitor to read peak to peak divided by two [(pk-pk)/2] deviation. Set filter of equipment from 25Hz to 15KHz. C. Press & hold the PTT button. D. Align RV2 for +/- 2.2 kHz deviation (+/-0.1KHz). RV2 is located on the bottom of the VCO shield can. E. Decrease audio generator level until deviation reads +/- 1.5 kHz (approximately 12mV) and record generator level. Level should be between 6 mV and 8 mV. F. Confirm that transmit audio distortion is less than 5%. 7. RECEIVER ALIGNME…

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