PM9FR548FRS

BF251,256 Users Manual Model BF251,256 DISPLAY 1. Large Segment Display: Indicates the channel number in use. 2. Small Segment Display: Displays the CTGSS tone option in the channel from (00-38). 3. Low Battery Level Indicator: Icon indicates the low battery status. 4. Voice Activated Transmission (VOX) Indicator: This function allows hands free conversation. The icon appears when the VOX mode is activated. Powering the transceiver: Your BF251,256 radio transceiver operates on four AAA batteries. Alkaline batteries will provide slightly better performance than rechargeable batteries. Only Audiovox approved rechargeable batteries can be recharged in the radio transceiver using the optional charging stand. Installing the batteries: Battery installation is made more convenient when the belt clip is removed. To do this, release the spring clip securing the belt clip to radio and slide the belt clip downward and away from the radio body. Next, press down with the thumb at the arrow, slide the battery cover down and lift off the battery cover. Insert four AAA batteries (alternate positive ends (+) toward the bottom of the transceiver, (starting left-to-right). 1. Using thumb, press down on battery cover at arrow and slide cover down to open. 2. Slide the cover down and then lift cover at bottom to open. Remove cover. 3. Insert four AAA batteries (positive (+) end toward the bottom begining at right side and alternating positive terminals as shown),or insert the rechargeable batteries. The following guidelines will improve performance and provide longer operating times for the BF251,256: 1. Do not mix old and new batteries. 2. The use of alkaline-type batteries is recommended to provide the longest operating time. 3. Do not mix alkaline, standard (carbon-zinc) or rechargeable batteries. 4. If the unit is not to be used for an extended period of time, remove the batteries. Old or leaking batteries can cause damage to the unit and will void the warranty. BF251,256 OPERATIONAL MODES Controls: Power On/Off (15) Button Press and hold the power on/off button ( ) for at least 2 seconds. You will hear a confirming melody to indicate the unit is on. To turn the unit off, press and hold the button for at least 2 seconds. Adjusting the Volume With the unit powered on, press the Up Channel/Volume button (
) to increase volume and the Down Channel/Volume button () to decrease volume. The display will indicate the current volume level by the small number in the icon ( ) Monitor/Display Backlight Button (2) This button is used to to check activity on the current frequency before transmitting. Check activity by pressing the Monitor (M) Button longer than 2 seconds; the busy icon will apppear on the display and you will hear static if frequency is clear. Do not transmit if you hear conversation. Hold down the Monitor Button again longer than 2 seconds and the busy icon will disapppear from the display. The monitor function will temporarily bypass the squelch setting and play all signals on a given channel. This feature is useful when communicating with other parties at extreme range. By pressing the monitor button momentarily, the LCD backlight is turned on; the LCD backlight will turn off automatically in about 5 seconds, or when the monitor button is pressed momentarily once again. Push To Talk (PTT) Button (4) Pressing and holding this button will allow you to speak to any transceiver that is set to the same channel and privacy code setting as yours. Hold the transceiver approximately 1 to 2 inches from your face as you speak into the built in microphone (9). After you have finished speaking, release the PIT Button to allow reception of incoming signals. It is not possible to transmit and receive at the same time. The PTT Button can also be used as a two-way call ringer Pressing the button twice quickly will call another party on the same channel. Up Channel/Volume Button (10) In the standby mode, pressing this button will increment the listening volume. When in function edit mode this button will be used to adjust the unit's settings. Down Channel/Volume Button (11) In the standby mode, pressing this button will decrement the listening volume. When in function edit mode this button will be used to adjust the unit's settings. Mode Button (12) This button is used to select various feature settings in the FRS. External Speaker (SPK)/Microphone (MIC) Jacks (6) This set of jacks accepts an Audiovox headset/microphone connector for total hands-free operation. Operating Mode and Features FRS Operation - From FRS standby mode, press and hold the (~) button for 2 seconds to turn on power. - Press the MODE button so the Channel number flashes. - Select the desired channel with the Up (10) and Down (11) Buttons. - Press and hold the PU button (4) to transmit, then speak into the microphone clearly and slowly. - Release PTT Button (4) to receive. - Communication can only be accomplished when the channel and CTCSS tone frequency of at least two parties are the same. - The CTC icon will be displayed on the LCD panel if the CTCSS tone frequency function is enabled. Channel Selection In order to communicate with other FRS units, both transmitting and receiving party must be on the same frequency. The BF251,256 has 14 channels (frequencies) (1-14) indicated by the large digits on the LCD display panel. Before transmitting on the selected channel, press the Monitor (M) Button (2) to check the activity on that channel. It there is activity on the selected channel, change to another channel that is clear. To change the channel, - From standby mode, press the MODE button (12) until the channel number flashes. - Press the Up Button (10) briefly to move to the next higher main channel number. - Press the Down Button (11) briefly to move to the next lower main channel number. CTCSS Mode (Sub-Channel) Selection Coded Tone Controlled Squelch System (CTCSS) with 38 Sub-Frequencies. This feature allows you to utilize the coded squelc…

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BF251,256 TECHNICAL DESCRIPTION Page 1 June 10, 2002 A). GENERAL DESCRIPTION The BF251,256 FRS 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 14 channels allocated by the FCC for the licensed 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 BF251,256 uses the maximum transmit power allowed to help ensure the maximum communication range. Features include: 14 FRS Channels with 38 CTCSS codes, Digital Receive Volume Control, Channel Monitor, Page 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 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 10.25MHz (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 10.7MHz) in the receive mode. The crystal reference frequency is shared with the 2 nd LO of 10.250MHz. BF251,256 TECHNICAL DESCRIPTION Page 2 C). TRANSMITTER CIRCUITS The transmitter amplifies the 0 dBm signal from the VCO to approximately 27 dBm that is fed to the antenna. The transmitter is a three stage amplifier composed of Q1,2,3,4 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 –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 (IC5C,D), a hard clipper circuit (IC5B) to limit maximum deviation to +/- 2.5 kHz and a three-pole low pass or splatter filter at 2.8 kHz (IC5A). 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 10.7MHz. The output of the mixer is tuned to the 1 st IF of 10.7 MHz. The 1 st IF is transformer coupled for impedance matching to a ceramic filter centered at 10.7MHz with a bandwidth of 180KHz. 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 (10.250 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 10.7 MHz ceramic 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 (IC4A) and amplified to provide 200mW 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 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 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 BF251,256 TECHNICAL DESCRIPTION Page 3 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 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 5 seconds on the current channel selected that is used to notify another person with FRS radio that you wish to communicate…

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APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc TABLE OF CONTENTS LIST TABLE OF CONTENTS LIST APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 TEST REPORT: PAGE 1-2....COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 3......RF POWER OUTPUT PAGE 4......MODULATION CHARACTERISTICS PAGE 5......AUDIO FREQUENCY RESPONSE PLOT PAGE 6......MODULATION LIMITING PLOT – 300 Hz PAGE 7......MODULATION LIMITING PLOT – 1000 Hz PAGE 8......MODULATION LIMITING PLOT – 3000 Hz PAGE 9......AUDIO LOW PASS FILTER PLOT PAGE 10.....OCCUPIED BANDWIDTH PAGE 11.....OCCUPIED BANDWIDTH PLOT PAGE 12.....OCCUPIED BANDWIDTH PLOT – CW PAGE 13.....METHOD OF MEASURING OCCUPIED BANDWIDTH PAGE 14.....FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 15.....FREQUENCY STABILITY PAGE 16-20..LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........FCC ID LABEL SAMPLE EXHIBIT 2.........SKETCH OF LOCATION EXHIBIT 3.........EXTERNAL PHOTO - FRONT VIEW EXHIBIT 4.........EXTERNAL PHOTO - REAR VIEW EXHIBIT 5.........INTERNAL PHOTO – COMPONENT VIEW EXHIBIT 6.........INTERNAL PHOTO – SOLDER VIEW EXHIBIT 7.........BLOCK DIAGRAM EXHIBIT 8.........SCHEMATIC EXHIBIT 9.........USER'S MANUAL EXHIBIT 10........CIRCUIT DESCRIPTION EXHIBIT 11........TUNING PROCEDURE EXHIBIT 12........TEST SETUP PHOTOGRAPH APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 1 of 20 GENERAL_INFORMATION_REQUIRED FOR_TYPE_ACCEPTANCE 2.1033(c)(1)(2)ASE TELECOM CO., LTD. will manufacture the FCCID: PM9FR548 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%. 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: 10K5F3E 95.631 Bn = 2M + 2DK M = 3000 D = 1900 Bn = 2(3000)+2(2250) = 10.5k Authorized Bandwidth 12.5 kHz 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 0.50 Watts effective 95.639 radiated power. There can be no provisions for 95.649 increasing the power or varying the power. 95.647 The antenna is an integral 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 = .123A Pin = 0.73 Watts APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 2 of 20 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included in the IN Exhibit 11 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 8 of this report. The block diagram is included as EXHIBIT 7 of this report. 2.1033(c)(11) A photograph or a drawing of the equipment identifica tion 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 EXHIBIT 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: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 3 of 20 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 = 0.19W ERP R.F. POWER OUTPUT TEST SET UP Agilent 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 80 cm above ground on a rotatable platform. APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 4 of 20 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 page 5. 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. 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 pages 6-8. Curves are provided for audio input frequen cies of 300, 1000, and 3000 Hz. 95.637(b) Post Limiter Filter The filter must be between the modulation limiter and the modulated stage. At any frequency between 3 & 20 kHz the filter must have an attenuation of 60log (f/3) greater that the attenuation at 1KHz. See the plot; page 9. APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 5 of 20 ASE Telecom Co. LTD. PM9BF256 -59 -54 -49 -44 -39 -34 -29 -24 -19 -14 100100010000 Frequency dBmV audio response APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 6 of 20 Modulation Limiting ASE Telecom Co. LTD. PM9BF256 0 500 1000 1500 2000 -24-14 dBmV Deviation 300 Hz APPLICANT: ASE TELECOM CO., LTD. FCC ID: PM9FR548 REPORT #: A\ASE\619ZKT2\619ZKT2TestReport.doc Page 7 of 20 Modulation Limiting ASE Telecom Co. LTD. PM9BF256 0 500 1000 1500 2000 2500 -57-47-37-2…

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