BBOFRS120BFamily Radio Transceiver

How to Use Your Cobra M i c ro Ta l k2 - Way Radio 1 Features of This Product • Two-way radio with up to a 2 mile range •14 channels • Backlit LCD • Roger beep confirmation tone • Call feature • SuperFlex™ antenna • Speaker/Microphone jacks • Belt clip • Wrist strap Contents Features..........................................................................1 Family Radio Service................................................A1 FCC Warnings Included Accessories Controls & Indicators................................................A2 Our Thanks to You......................................................A3 Customer Support...................................................A3 Operating your microTALK Battery Installation...................................................2 Turning On..................................................................3 Illuminating the Display........................................3 Auto Squelch.............................................................4 Maximum Range Extender/Auto Monitor......4 Select Channel..........................................................5 Calling Another Party.............................................6 Talking To Another Party.......................................7 Roger Beep Confirmation Tone...........................8 Listening For Another Party.................................8 microTALK Range.....................................................9 Making Life Easier And Safer...............................10 microTALKSNAP Removable Front....................11 External Microphone/Speaker Jack...................12 Caring for Your microTALK....................................14 Frequency Ranges.....................................................16 microTALK Specifications.......................................16 Limited Two Year Warranty....................................18 Optional Accessories................................................19 Order Form....................................................................20 If You Think You Need Service.............Back Cover FRS_120 3/2/01 3:19 PM Page 1 Pull lock tab down to remove battery cover. Insertthree “AA” batteries. Position batteries according to po l a ri ty marki n g s. Operation 2 Note Batteries are not included with microTALK 2-way radio. Always use 3 high q u a l i ty AA alkaline batte ri e s or optional batte ry pack (sold separa te ly ) . Note When batteries are low the i n d i ca tor willb l i n k . Note Visit Cobra Electronics ( w w w. co b ra e l e ct ro n i c s. co m ) for information abo u t optional batte ry pack and d e s k top charger acce s s o ri e s. Install Batteries Battery Installation 12 FRS_120 3/2/01 3:19 PM Page 2 Turnthe On/Off/Volume switch.An audible “tone”will indicate the unit is on. Operation 3 Turning On Your microTALK Note Whenever the unit is on you can receive communi- cations. Turning On Your microTALK Illuminating the Display Illuminating the Display 1 1 Push and releaseLIGHT/MAX RANGE button to illuminate display for ten seconds. FRS_120 3/2/01 3:19 PM Page 3 Operation 4 Note To learn more about the range of your microTALK, see page 9. Range is dependent on battery condition and geographic terrain. Auto Squelch Maximum Range Extender Maximum Range Extender Auto Squelch can be temporarily removed to allow all signals to enter (Maximum Range Extender). Auto Squelch Your microTALK is equipped with Auto Squelch, which automatically shuts off weak transmissions and unwanted noise due to terrain conditions or if you have reached your range limit. 1 Push and holdLIGHT/MAX RANGE button to allow all signals to enter. Auto Monitor Auto Monitor When the signal you want to hear is consistently weak,you may place the radio in Maximum Range mode without having to constantly hold the button:Press and hold the Maximum Range Extender button for five seconds. Two beeps confirm Auto Monitor is on.To return to normal operation,momentarily press the Maximum Range Extender button again or change channels. FRS_120 3/2/01 3:19 PM Page 4 Selectany of the 14 channels by pushing the channel up or down buttons. Select Channel Turn on the microTALK 2-Way Radio. Operation 5 Select Channel Note Units must be tuned to the same channel number in order to communicate. 2 1 FRS_120 3/2/01 3:19 PM Page 5 Note Both units must be ON and tuned to the same channel. Your incoming “Call”signal volume is dependent on the unit volume s e t t i n g. Operation 6 Calling Another Party To alert another party that you wish to communicate: Push and releaseCALL button.The unit you are calling will hear a two second ringing tone. Calling Another Party 1 FRS_120 3/2/01 3:19 PM Page 6 Operation 7 Note While the TALK button is depressed you cannot receive incoming calls. Talking To Another Party Talking To Another Party Hold mic about 2 inches from mouth.Speak in a normal voice. ReleaseTALK button and listen for response. Push and hold TALK button. The TX / RX indicato r will be displayed. 12 34 FRS_120 3/2/01 3:19 PM Page 7 Operation 8 Roger Beep Confirmation Tone Listening For Another Party When finished talking: Listening For Another Party ReleaseTALK button to receive incoming transmissions. Your microTALK is always in listening mode when the TALK button is not pressed. Adjust volume byturningthe On/Off Volume Switch 1 Note While the TALK button is depressed you cannot receive incoming calls. Your listener will hear an audible tone when you releasethe TALK button. This alerts the other party t h at you are finished talki n g and it’s OK for them to be g i n t a l ki n g. Roger Beep Confirmation Tone 2 FRS_120 3/2/01 3:19 PM Page 8 Operation 9 microTALK Range Your micro TALK Radio has a range of up to2 miles. This effective range can be shortened under some conditions. Note To achieve maximum range the auto squelch can be overridden.Refer to Maximum Range Extender section on page 4. microTALK Range 1.Under flat,open conditions you will experience the microTALK’s maximum range. …

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FRS120B.sch-1 - Tue Jan 16 09:53:56 2001

Front View Back View Side View Top View

PCB, Top PCB, Bottom

8. ALIGNMENT INSTRUCTIONS WARNING Any repairs or adjustment should be made under the supervision of a qualified radio-telephone technician. TRANSMITTER 1. Pow er Supply Voltage The power supply voltage sho uld be set for 4.5 V DC measured at the radio during transmit. Periodically check the supply voltage during the alignment procedure. 2. Frequency Setting A. Connect a frequency counter or Communications Service Monitor to the antenna connector thro ugh an RF po wer attenuator (10 watt minimum rating, 20 dB minimum attenuation). B. Depress the PTT switch. C. Adjust the TCXO such that output frequency is equal to the channel Frequency with a maximum error of ±300 Hz. D. Release the PTT switch. 3. Output Pow er Alignment A. Set the power supply vo ltage for 4.5 V Dc. B. Connect a communications Service Monitor or a wattmeter and dummy load to the antenna connector C. Depress the PTT switch. D. To be convinced for 0.5 watt output power with a maximum error of ±0.1 watt. E. Release the PTT switch. 4. Deviation Adjustment A. Connect an audio generator to the micropho ne jack JIG. The audio frequency sho uld be set at 1 KHz B. Connect an FM deviation meter or communicatio n Service Minitor to the antenna co nnector Thro ugh an RF power attenuator (10 watt minimum rating, 20 dB minimum attenuator ). Set the mo nitor to read peak deviation. C. Depress the PTT switch. D. Adjust the audio generator level 100 mV rms. E. Adjust RV3 for 2.3 KHz maximum deviatio n (1 KHz dev. 20 dB up) F. Release the PTT switch.

FRS120-2.sch-1 - Tue Jan 16 09:55:23 2001

ENGINEERING STATEMENT For Type Certification of Cobra Electronics Corporation Model No: FRS 120 FCC ID: BBOFRS120B 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 Cobra Electronics Corporation to make type certification measurements on the FRS 120 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: February 26, 2001 A. INTRODUCTION The following data are submitted in connection with this request for type certification of the FRS 120 transceiver in accordance with Part 2, Subpart J of the FCC Rules. The FRS 120 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 0.5 watts ERP. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Paragraph 2.983 of the Rules) 1. Name of applicant: Cobra Electronics Corporation 2. Identification of equipment: FCC ID: BBOFRS120B 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 FRS 120 fully complied with that power limitation. e. The dc voltage and dc currents at final amplifier: Collector voltage: 4.4 Vdc Collector current: 0.56 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 FRS 120 has a permanently attached built-in antenna without provisions for a coaxial connector. RF power output was determined by substitution. TABLE 1 Operating Freq., MHz Power watts into an ideal dipole antenna 462.5625 0.47 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 2669 Hz, the frequency of maximum response. Measured modulation under these conditions was 1.8 kHz. 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: BBOFRS120B FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: BBOFRS120B FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: BBOFRS120B 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 = 40 than 250% of the authorized (P = 0.47) bandwidth (over 31.25 kHz) OCCUPIED BANDWIDTH FCC ID: BBOFRS120B 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 FRS 120 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. MEASUREMENTS OF SPURIOUS RADIATION Measurements of radiated spurious emissions from the FRS 120 were made by substitution method with a Tektronix 494P spectrum analyzer using Singer DM-105 for the measu…

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