PM9GMRS1600FRS/GMRS Combination Transceiver

GMR1600 OPERATION DESCRIPTION REV. 0 ASE TELECOM FEATURE DESCRIPTIONS The feature set of the GMRS1600 radio is based upon a common set of functions from a most of popular units. G 1.1.1 GMRS Channels Each radio in the product line is capable of transmitting and receiving on any of the available 22 GMRS channels. Channel 1-14 share with the FRS channel 1-14. The channel frequency assignments are as follows: GMRS Frequencies FRS 1 462.5625MHz 1 2 462.5875MHz 2 3 462.6125MHz 3 4 462.6375MHz 4 5 462.6625MHz 5 6 462.6875MHz 6 7 462.7125MHz 7 8 467.5625MHz 8 9 467.5875MHz 9 10 467.6125MHz 10 11 467.6375MHz 11 12 467.6625MHz 12 13 467.6875MHz 13 14 467.7125MHz 14 15 462.5500MHz 16 462.5750MHz 17 462.6000MHz 18 462.6250MHz 19 462.6500MHz 20 462.6750MHz 21 462.7000MHz 22 462.7250MHz 1.1.2 CTCSS Sub-codes CTCSS sub-codes are continuous sub-audible tones which are transmitted along with the normal audio signal to allow receiving GMRS radio units to selectively choose which radio transmissions will be heard by the user. While this will not ensure truly private communication, it will help reduce annoying receptions by allowing only those transmissions sent with a corresponding CTCSS sub-code to be heard by the user. The product line implements the most commonly used standard consists of 38 CTCSS sub-codes to be used on any of the GMRS channels. Regardless of the use of CTCSS sub-codes, it cannot be stressed enough that there shall still only be a single transmission on each of the GMRS channels at any moment in time. The sub-codes only serve to limit unwanted radio traffic from being heard. They do not “multiply” the capacity of an individual GMRS channel. The CTCSS sub-codes and their corresponding frequencies are as follows: 1.1.3 Backlit LCD All members of the product line utilize LED backlighting to illuminate the LCD display in dark ambient conditions. The LED operation is as follows: Enabled for 5 seconds upon Monitor button operation within 1 second. Enabled for 5 seconds upon Power button operation for system ON. 1.1.4 Power on Sequence When units are powered on, all of LCD display segments will be activated for 400mS. LCD backlight will be activated for 5 seconds. Local beep tone will be generated for once. 1.1.5 Auto Squelch The radio unit is to be quiet during standby/receive mode except when a signal of sufficient strength is received. When a signal level greater than a preset squelch level (8-16dB sinad) is received, the unit will engage the audio output to allow the signal to be heard. CodeFrequency (Hz)CodeFrequency (Hz)CodeFrequency (Hz) 0Disabled13103.526162.2 167.014107.227167.9 271.915110.928173.8 374.416114.829179.9 477.017118.830186.2 579.718123.031192.8 682.519127.332203.5 785.420131.833210.7 888.521136.534218.1 991.522141.335225.7 1094.823146.236233.6 1197.424151.437241.8 12100.025156.738250.3 1.1.6 Automatic Battery Saver The radio unit will enter power save mode automatically within 5 seconds of no button or receive activity. During this mode, the unit will enter a power cycle sequence where it will alternate between monitoring the receive channel for 200ms and entering a low-power “sleep” mode for 400ms. The LCD will continue to operate normally during power cycle mode. 1.1.7 Automatic Channel/Last State Saver All user programmable parameters are automatically retained during the power off condition. 1.1.8 NiMH Battery Units equipped for rechargable NiMH battery may be recharged through the user accessory jack of the radio. Units automatically will detect NiMH battery in order to prevent the system from recharging primary type alkaline batteries. 1.1.9 Channel scanning function Channel scanning allows rapid monitoring of all channels for activity automatically, pausing on a channel for as long as it is active. Scanning will be performed on all GRMS channels and their selected CTCSS sub-codes. The unit will scan normal channels at a reduced minimum speed of 100mS to check for received carrier and an additional 400mS if a CTCSS code is selected for channel. 1.1.10 Monitoring Monitoring allows to override the automatic squelch operation. 1.1.11 Battery Low Alert Under a low battery condition, a “low battery warning” tone will be emitted at a 2 minute interval during receive mode and no sooner than 30 seconds after switching from Transmit to Receive mode. 1.1.12 Key Lock Key is locked by pressing and held “Emergency” button for 3 seconds. 1.1.13 Tones All units are capable of generating a predefined paging tone pattern for alerting other units on the same channel/CTCSS sub-code. Units with user selectable paging tone patterns allow distinctive paging alerts for easier identification of the paging source. The paging tone patterns are as follows: 1.2 BLOCK DIAGRAMS 1.3 BUTTONS AND CONTROLS All units in the product line utilize the same set of buttons and switches for all control functions and parameter programming. The controls for each unit are as follows: POWER ON,OFF This button turns the radio on/off. This button is pressed and held for over 1 second to turn on. Turning the radio on initiates a CPU reset and restarts the system software. This button is pressed and held for over 2 second to turn off. PTT / PAGING: To transmit, the button must be pressed and held for the duration of the user transmission. The button must be pressed for a twice to transmit a preprogrammed sequence of tones to be used as an audio paging function of other users on the same channel/sub-code. The transmitted tones will be output locally through the speaker or audio accessory jack for confirmation. MONITOR / BACKLIT LCD: This button is pressed and held to check the current GMRS channel for current activity and override the automatic squelch operation. After this button is pressed & held for more than 2 second, monitoring will be continued without holding this button. To terminate the continued this operation, press this button once. This button turns the backlit LCD. This button is shortly pressed to …

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849 NW State Road 45 • P. O. Box 370 • Newberr y, Florida 32669 USA Telephone (352) 472-5500 • (888) 472-2424 • FAX (352) 472-2030 • email: [email protected] July 17, 2002 Ms. Linda Elliott Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: ASE TELECOM CO., LTD.’S FCC ID: PM9GMRS1600 Dear Ms. Elliott: Per your request of today, Correspondence ID 23369, the FCC Identifier on the label sample is correct; the 731 form was in error. This letter will serve as a request to update the 731 form to read PM9GMRS1600. Should you have any questions, please advise. Regards, Sharon Hoffman

ASE TELECOM CO., LTD. 7th F., Yung chang B/D., 250 Cheol san-dong, Kwang myong Kyung gi-do, Korea Tel: +822-680-1300 Fax: +822-680-1309 FCC MARKING/LABEL FOR PART 15 FCC ID : PM9GMRS1600 Brand Name : ASETELECOM MODEL NO.:GMRS1600 THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS : (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

GMRS 1600 TECHNICAL DESCRIPTION Page 1 May 25, 2002 A). GENERAL DESCRIPTION The 1600 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 for the licensed GMRS & FRS. This model also features a CTCSS system with 38 pre-defined, user selectable sub-audible tones for channel quieting. The useable range, while dependent upon terrain and other radio propagation principles, is typically five miles. The 1600 uses the maximum transmit power allowed to help ensure the maximum communication range. Features include: Weather Radio receiver with 10 channel, 22 GMRS & FRS Channels with 38 CTCSS codes, Digital Receive Volume Control, Channel Monitor, Page, Keypad Lock, and LCD Display. The unit is equipped with an external Headset option connector. Four AAA 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 IC401 (Toshiba TB31202, or equipvalent). The frequency of operation of the GMRS voltage controlled oscillator (VCO), composed of Q401 and Q402 operating in cascade & WEATHER RADIO voltage controlled oscillator (VCO) composed of Q603, is phase locked to a voltage controlled crystal reference (VCXO) operating at 20.95 MHz (X401). Compensation for both temperature and power supply variations on the crystal reference is accomplished by measuring the ambient temperature and supply variation through an PWM circuit composed of diode (D403). The microcontroller (IC101) then converts these measurements to a correction voltage output through a PWM to maintain the frequency of the VCXO within the +/- 2.5 ppm requirement. 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 21.4 MHz) in the receive mode. The crystal reference frequency is shared with the 2 nd LO of 20.950 MHz. GMRS 1600 TECHNICAL DESCRIPTION Page 2 C). TRANSMITTER CIRCUITS The transmitter amplifies the 0 dBm signal from the VCO to approximately 30 dBm that is fed to the antenna. The transmitter is a three stage amplifier composed of Q101,102, Q103,104 and Q105. 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 –60 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 (IC101A,B), a hard clipper circuit (IC101C) to limit maximum deviation to +/- 2.5 kHz and a three-pole low pass or splatter filter at 2.8 kHz (IC101D). The low pass filter insures that the occupied bandwidth of the FM modulated signal meets FCC requirements under all input conditions. D). RECEIVER CIRCUITS 1. GMRS SECTION 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 – Q202) 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 (C218,L207,C219,L208,C220,L209) with pass-band of 460 to 470 MHz and stopband attenuation of 30 dB. The filtered receive signal is one input to the 1 st mixer (Q203), the other mixer input (1 st LO) is the output of the VCO at the desired channel frequency minus 21.4 MHz. The output of the mixer is tuned to the 1 st IF of 21.4 MHz. 2. WEATHER RADIO SECTION The received signal from the antenna is band limited to 166 MHz by the transmitter harmonic filter. The desired signal is fed to a low noise amplifier (LNA – Q401) centered from 161 to 164 MHz that provides approximately 8 dB of gain. The output of the LNA is filtered with a impedance matching network ( L601) with passband of 161 to 164 MHz and stop-band attenuation of 20dB. The filtered receive signal is one input to the 1 st mixer (Q601), the other mixer input (1 st LO) is the output of the VCO at the desired channel frequency minus 21.4 MHz. The output of the mixer is tuned to the 1 st IF of 21.4 MHz. 3. COMMON SECTION The 1 st IF is transformer coupled for impedance matching to a crystal filter centered at 21.4 MHz with a bandwidth of 7.5 KHz. The filtered 1 st IF is then amplified by Q207 and fed to the 2 nd mixer input of the multi-function receiver IC (IC201). The 2 nd LO (20.950 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 21.4 MHz crystal filter provides approximately 50 dB of adjacent GMRS 1600 TECHNICAL DESCRIPTION Page 3 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 (IC401-A-A) and amplified to provide 200 mW of audio power (IC503). A squelch circuit is provided (IC201 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 12 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 D201 and D101 are both turned on (representing less than 0.7 ohms). D101 allows the transmit signal to pass to the antenna and D201 shorts …

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TRANSMITTER ALIGNMENT METHOD GMRS 1600 1. Frequency Setting A. Connect a frequency counter or communications service monitor capable of at least five watt RF. B. Press the PTT switch. C. Adjust CV401 trimmer capacitor such that the output frequency is equal to the channel frequency with a maximum error of +/- 200 Hz. CV401 is located below RV101 and RV101 is located below the VCO shield can. 2. Output Power Alignment A. Connect a communications service monitor or a wattmeter and dummy load to the antenna connector. B. Press the PTT switch. C. Adjust air coil (L101) by spreading or de-spreading, to achieve maximum power, not to exceed 1.2W. Note: Normally, it is not necessary. 3. Deviation Adjustment A. Connect an audio generator with 10uF coupling capacitor to the microphone jack. The audio frequency should be set at 1KHz with a level of 200mV. B. Connect an FM deviation meter or communications service monitor to the antenna connector. Set the monitor to read peak deviation. C. Press the PTT switch. D. Adjust RV101 for +/- 2.3KHz deviation. RV101 is located below the VCO shield. G



 
 

APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc TABLE OF CONTENTS TABLE OF CONTENTS LIST APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS1600 TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CONTINUED PAGE 3......RF POWER OUTPUT PAGE 4......MODULATION CHARACTERISTICS PAGE 5......AUDIO FREQUENCY RESPONSE GRAPH PAGE 5......MODULATION LIMITING GRAPH – 300Hz PAGE 6......MODULATON LIMITING GRAPH – 1000Hz PAGE 6......MODULATION LIMITING GRAPH – 3000Hz PAGE 7......AUDIO LOW PASS FILTER GRAPH PAGE 8......OCCUPIED BANDWIDTH PAGE 9......OCCUPIED BANDWIDTH PLOT - CW PAGE 10......OCCUPIED BANDWIDTH PLOT PAGE 11......SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 12-13...UNWANTED RADIATION PAGE 14......METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 15......FREQUENCY STABILITY PAGE 16-19...LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE EXHIBIT 2.........SKETCH OF FCC ID LABEL LOCATION EXHIBIT 3.........EXTERNAL PHOTO – FRONT VIEW EXHIBIT 4.........EXTERNAL PHOTO – REAR VIEW EXHIBIT 5.........INTERNAL PHOTO – COMPONENT VIEW EXHIBIT 6.........INTERNAL PHOTO – COPPER VIEW EXHIBIT 7.........BLOCK DIAGRAM EXHIBIT 8.........SCHEMATICS EXHIBIT 9.........USER'S MANUAL EXHIBIT 10........CIRCUIT DESCRIPTION EXHIBIT 11........TUNING PROCEDURE EXHIBIT 12........TEST SET UP PHOTO APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc Page 1 of 19 GENERAL INFORMATION REQUIRED FOR CERTIFICATION 2.1033(c)(1)(2) ASE TELECOM CO., LTD. will manufacture the FCCID: PM9GMRS-1600 GMRS/FRS COMBINATION TRANSCEIVER in quantity, for use under FCC RULES PART 95. ASE TELECOM CO., LTD. 7F., YUNGCHANG B/D., 250 CHEOLSAN-DONG KWANGMYONG-CITY KYUNGGI-DO KOREA 2.1033 (c) TECHNICAL DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included as EXHIBIT 9. 2.1033(c) (4) Type of Emission: 11K0F3E 95.631 Bn = 2M + 2DK M = 3000 D = 2.5K Bn = 2(3000)+2(2500) = 11K GMRS Authorized Bandwidth 20.0 kHz 2.1033(c)(5) GMRS Frequency Range: 1. 462.5500 13. 462.7000 95.621 2. 462.5625 14. 462.7125 3. 462.5750 15. 462.7250 4. 462.5875 16. 467.5500 5. 462.6000 17. 467.5750 6. 462.6125 18. 467.6000 7. 462.6250 19. 467.6250 8. 462.6375 20. 467.6500 9. 462.6500 21. 467.6750 10. 462.6625 22. 467.7000 11. 462.6750 23. 467.7250 12. 462.6875 2.10311c)(6)(7) The Maximum Output Power Rating: GMRS HIGH POWER - 0.9 Watts GMRS LOW POWER - 0.42 Watts FRS - 0.4 Watts FRS Authorized Bandwidth 12.5 kHz 2.1033(c)(5) FRS 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 APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc Page 2 of 19 2.1033(c)(6)(7) Power Output shall not exceed 0.50 Watts effective 95.639 radiated power. There can be no provisions for 95.649 increasing the power or varying the power. 2.1033(c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY FOR LOW POWER SETTING INPUT POWER: (6.0V)(.310A) = 1.86 Watts FOR HIGH POWER SETTING INPUT POWER: (6.0V)(.500A) =3.00 Watts 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included as EXHIBIT # 11. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 8 of this report. The block diagrams are included as EXHIBIT 7 of this report. 2.1033(c)(11) A photograph or a drawing of the equipment identification label is included as exhibit No. 1. 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 exhibits 3-6. 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. APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc Page 3 of 19 95.639 Power Output shall not exceed 50.0 Watts effective radiated power. There can be no provisions for 95.649 increasing the power or varying the power. 2.1046(a) RF power is measured by the substitution method as outlined in TIA/EIA - 603. With a nominal battery voltage of 6.0 V, and the transmitter properly adjusted the RF output measures: OUTPUT POWER: GMRS HIGH - 0.9 Watts ERP GMRS LOW – 0.4 Watts ERP FRS: 0.4 Watts ERP 2.1046(a) RF power output. The test procedure used was TIA/EIA-603 S2 APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc Page 4 of 19 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 on the next page. 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. See Page 5 of report. 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 on the following pages. Curves are provided for audio input frequen- cies of 300, 1000, and 3000 Hz. See Pages 6,7 & 8 of report. 95.637 Post Limiter Filter Each GMRS transmitter, except a mobile station transmitter with a power of 2.5Watts or less, must be equipped with an audio low pass filter. At any frequency between 3 & 20 kHz the filter must have an attenuation of 60log (f/3) greater than the attenuation at 1 kHz. See Page 9 of report. APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9GMRS-1600 REPORT #: T:\A\ASE\532KT2\532KT2TestReport.doc Page 5 of 19 ASE Telecom Co. LTD. GMRS-1600 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 100100010000 Frequen…

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