Midland Radio 75503 User Manual 8
Midland Radio Corporation 8
8
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| Document ID | 40157 |
| Application ID | 0aELm5PeUu9wXSrovkCWOA== |
| Document Description | 8 |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 14.81kB (185071 bits) |
| Date Submitted | 1999-06-03 00:00:00 |
| Date Available | 1999-04-09 00:00:00 |
| Creation Date | 2001-06-18 18:08:48 |
| Producing Software | Acrobat Distiller 4.0 for Windows |
| Document Lastmod | 2001-06-18 18:08:49 |
| Document Title | 8 |
FCC ID: MMA75503 APPENDIX 5 USERS MANUAL EIGHT (8) PAGE USER INSTRUCTIONS FOLLOW THIS SHEET USERS MANUAL FCC ID: MMA75503 APPENDIX 5 MmLAN n MODEL 75-503 NEW FRS “FAMILY RADIO SERVICE” MAXIMUM POWER MICRO-SIZE 3 CHANNEL, WITH POWER SAVE CIRCUIT TABLE OF CONTENTS Introduction ....... Battery Installation, Belt Clip, Quick Use Instructions Controls and Operation... . Battery Information and Servree Technical Specification, Warranty ............... OPTIONAL ACCESSORIES FOR YOUR RADIO Accessory Name Model Number Siandard Ni-Cad Charger ............. .18-395 Lapel Microphone with Earbud Speaker 22—405 Speaker/Microphone .................... Slealth Type Noise Canceling Throat Mic with Earbud, 2-430 Boom Microphone Headset ............................... Call 1 816 24] 8500 ext, 200 to order awessnries THIS RADIO COMPLIES WITH PART IS OF THE FCC RULES. OPERATION IS SUBJECT TO THE CONDITION THAT THIS DEVICE DOES NOT CAUSE HARMFUL INTERFERENCE. Your Midland model 75-503 brings the new FRS (Family Radio Service) lo your fingertips. The Family Radio Service is provided for by the FCC and is totally license free. For the first time business and the general public can use the quiei UHF FM band for personal communications at no charge The 75—503 uses maximum allowable power for range up to 2 miles. Use for fishing, hunting, picnics, hiking, business, or any other activity where communications are needed for convenience or safety. The model 75-503 operates on 3 channels to provide the best in quiet and private communication. Also (his radio offers power save, and auto—squelch, TIPS FOR GETTING THE MOST FROM YOUR 75-503 Due to the band of operation (462/467 MHz) the 75-503 provides communications that are virtually the of atmospheric interference (skip) that is common on lower frequency bands. Along with this and an antenna system that is very efficient as compared to other unlicensed radio bands, communications range is surprisingly good, Many times the limits to maximum possible range are environmental factors such as blookage caused by trees, buildings, hills, or other obstructions, lfyou find communication is not possible, many times this can be overcome by moving only a few feet to a new location. Range may be reduced while operating in a vehicle or from inside to outside a metal building. Battery condition also affects range. The 75-503 operates best on alkaline batteries. While this unit has been designed with gaskets for water resistance and ruggednss it is a precision piece of electronic equipment that should not be exposed to water or handled carelessly. Normal care should result in years of trouble free operation. Do not leave batteries installed over a long period oftime as leakage may occur that can destroy the radio, Always save your receipt, as it is required for warranty consideration. PREPARATION BATTERIES 75-503 radios operate with 3 AA alkaline batteries or Ni—cad batteries (batteries not supplied). Alkaline batteries will provide about 24 hours of use Ni-cad batteries provide about 8 hours of use. Ni-Cad batteries must be charged prior to use. Charge time is 10 hours with the wall charger (not supplied). Do not mix battery types in the radio. To Install Batteries: 1. Hold the radio face down. Press the latch so it swings away from the cover. 2. Lifi the battery cover off the unit. 3. Insert 3 AA batteries observing the proper polarity. 4, Replace the battery cover over the batteries and fasten with the latch. Low Battery/Transmit Indicator: The "TX/BAT?" LED on the front ofthe radio will light when the unit is transmitting and what not transmitting if the batteries are low. BELT CLIP The 75-503 comes standard with a belt clip, Attach it to the radio back by sliding the top ofthe clip up over the two rectangular bosses an the back ofthe radio until it snaps into place. To detach the belt clip, press the lever inside the top of the clip away from the radio body and slide the clip toward the bcntom of the radio. QUICK USE INSTRUCTIONS: 1. Install fresh alkaline or fully charged Ni-cad batteries 2. Turn the unit on by turning the volume control clockwise. 3. To talk press the PTT (push-totalk) button on the side of the radio and talk into the fi‘ont ol' the radio. 4, To listen release the PTT button. 5. Volume and other functions maybe adjusted as described later. POWER SAVE CmCUlT This part ofrhe operation of the radio is completely automatic and not adjustable. When the radio has not transmitted or received a signal for about 8 seconds it will begin to cycle from a sleep mode to fully on. This occurs about once a second. lfa signal is received or you cause the unit to transmit the radio will become fully awake. This cycling from sleep to fully on increases the standby battery life more than 50%. FEATURES AND LOCATION OF CONTOIS TOTURNTH'E RADIOONOROFF The ON/OFF/VOLUME control at the top of the radio controls power and volume. A series oftonts will be heard confirming that radio is on. TO CHANGE THE CHANNEL IN USE Select the channel by sliding the channel switch to position I, 2, or 3. These selections correspond to chamnels l, 3, an 5 on any 14 channel FRS radio. TO USE CALL BUTTON Press and release the CALL button. A call signal will be sent for about 2 seconds The signal will also be heard in the speaker, TO ADJUST THE VOLUME Use the ON/OFF/VOLUME control Io adjust the volume. To test the volume setting, press the "MON“ button so static noise can be heard. The noise can be used as a reference level for volume sening. TROUBLESHOOTING PROBLEM SOLUTION No Power 1. Check battery installation and/or replace batteries Cannot Rweive Messages I.Make sure the volume is set high enough. 2. Change your location. you may be cut of range. 3. Install batteries pr_opcrly or replace. Range is Short 1. Operating the radio in a vehicle or metal building will decrease the range. If possible operate outside of vehicles or buildings. 2. Carrying the radio 50 that the antenna is very near the body will decrease the range. Hold the radio in the open for the best range. Interference/Static ll Change your location. The interference may be causedhy nearby electronic or electrical equipment. CARE OF RECHARGEABLE NI-CAD BATTERIES ALWAYS DISPOSE OF BATTERIES PROPERLY Always follow the battery manufactures recommendations for charging and disposing ofNiCad batteries. The following is meant as general information regarding Ni—Cad batteries. I, Occasionally allow the batteries to fully discharge before recharging. Full discharge will be indicated by the low battery indicator coming on during receive operation. 2, Always allow the battery to frilly charge before using. This requires 10 hours with the optional charger. l The above will prevent the batteries from developing “finemory' which effectively reduces their capacity. 4. It is better to store Ni-Cad batteries that are discharged rather than charged. SERVICE: If it ever becomes necessary to return your unit for service: Pack the unit in its original box and packing. Improper packing may result in damage during shipment. Include a full description of any problems and a daytime telephone number. For warranty service include a photocopy of the hill of sale or other proof of purchase showing the date of sale Include a money order for $7.50 to cover shipping and handling (this may not be required in some states) You do not need to return accessory items (brackets, screws. power cord, antenna etc.) unless they maybe directly related to the problem. A flat rate of$45.00 will apply to repairs not covered by warranty. Send only cashiers check, money order or Master Card or Visa card number. TECHNICAL SPECIFICATIONS" GENERAL Frequency range Channels...” Modulation type Antenna impedance Loudspeaker, Microphone,. Power supply... RECEIVER Sensiiivity at IZdB Sinad ................ Selectivity... Squelch rang , Audio output power Distortion at IOOO mV... Audio fiequency response. TRANSMITTER RF Output Power.... Frequency Toleran Harmonic Suppressio Modulation ...... Jmlninll 500 mW @ 4.50VDC 0.00025% *Specificntions are nominal and sllhjecl to change CHANNEL FREQUENCIES I i;012462.5625 MHz 2=03462 6|25 MHz 330524626625 MHz | LIMITED WARRANTY Midland Consumer Radio Inc. will repair or replace. at its option without charge, any Midland Mobile, 4 watt portable, Base Station Citizens Band, or FRS transceiver which fails due to a defect in material or workmanship within one year following the initial consumer purchase. This warranty does not include any carrying eases earphones, or antennas which may be a part of or included with the warranted product, or the cost of labor for removal or re-installation of the product in a vehicle or other mounting. Performance of any obligation under this warranty may be obtained by returning the warranted product, freight prepaid, along with proof of purchase date. to Midland Consumer Radio Inc, Warranty Service Department, 1670 North Topping Avenue, Kansas City. Missouri 64120, or to any "Midland Authorized Warranty Service Station," or to the place of purchase (if a participating dealer). Wm'ranty information and the location ofthe nearest “Midland Authorized Warranty Service Station," may be obtained by writing Midland Consumer Radio. Warranty Service Department. This warranty gives you specific legal rights, and you may also have other rights. which vary, from stateto state. Note: The above warranty applies only to merchandise purchased in the United States of America or any of the territories or possessions thereof, or from a US. Military exchange. For warranty coverage on merchandise purchased elsewhere, ask your dealer. Midland Consumer Radio 1670 N. Topping Kansas City, Mo. 64120-1224 Printed in Korea Tel: (81 6) 241-8500) E-mail: midlndcfimidlandradioxom URL: www.midlandradio.com FCC ID: MMA75503 APPENDIX 6 ALIGNMENT PROCEDURE ONE (1) PAGE ALIGNMENT PROCEDURE FOLLOWS THIS SHEET ALIGNMENT PROCEDURE FCC ID: MMA75503 APPENDIX 6 7. Alignment instructions WARNING Any repairs or adjustments should be made under the supervision ofa qualified radioftelephone technician. TRANSMITTER 1. Power Supply Voltage The Power supply voltage should be set for 4.5 VDC measured at the radio during transmit. Periodically check the power supply voltage during the alignment procedure. 2, Frequency Setting A. Connect a frequency counter or Communications Service Monitor to the antenna connector through an RF power attenuator (5 watt minimum rating, 20 dB minimum attenuation). B. Depress the PTT switch. C. Adjust the CT—l trimmer capacitor such that the output frequency is equal to the channel frequency with a maximum error of +/' 200 Hz. D. Release the PTT switch 3. Output Power Alignment. A. Set the power supply voltage for 4.5 VDC. B. Connect a Communications Service Monitor or 21 watt meter and dummy load to the antenna connector. C. Depress the WT switch. ~ D. To be convinced for 0.5 Watt(50 ohm load) output power with a maximum error of ~/— 015 Watts, E. Release the PTT switch 4. Deviation Adjustment. A. Connect an audio generator . The audio frequency should be set at 1 KHZ. B. Connect an FM deviation meter or Communications Service Monitor to the antenna connector through an RF power attenuator (5 watt minimum rating; 20 dB minimum attenuation). Set the monitor to read peak deviation. Depress the P’I‘T switch. Adjust RVS for +/— 2.5KHz maximum deviation. Release the P’I‘T switch. mp0 FCC ID: MMA75503 APPENDIX 7 CIRCUITS AND DEVICES T0 STABILIZE FREQUENCY A PLL and 12.8 MHz TCXO determine and stabilize frequency. CIRCUITS AND DEVICES T0 STABILIZE FREQUENCY FCC ID: MMA75503 APPENDIX 7 FCC ID: MMA75503 APPENDIX 8 CIRCUITS T0 SUPPRESS SPURIOUS RADIATION AND LIMIT MODULATION CIRC IT U SS ONS A low pass filter consisting of L23, C310, L25, 0311, L26, C312, c313, L27, C315, and C316 attenuate spurious emissions. CIRCUITS TO LIMIT MODULATLOM ICG provides mike gain, limiting and audio low pass filtering. CIRCUITS T0 SUPPRESS SPURIOUS RADIATION AND LIMIT MODULATION FCC ID: MMA75503 APPENDIX 8 w555\mid75503
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