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uniden @
Sundowner
UH-O53
16-Channel Personal
UHF2-Way Radio
Operating Manual
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Please read carefully before operating this radio. Safety Information . 00 NOT operate the transmitter of any radio equipment with the antenna touching, or close to the eyes, face, or exposed body parts. . 00 NOT operate the transmitter of any radio equipment unless all the Radio Frequency (RF) connectors are secure and any open connectors are properly terminated. . 00 NOT operate the transmitter of any radio equipment near electrical blasting caps or in an explosiveatmosphere. . 00 NOT let chil
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Table of Contents Introduction... 2 Warning! 2 Feature Highlights 3 Unpacking 3 OptionalAccessories 3 Controls and Indicators 4 Getting Started 5 Chargingthe Battery 5 Mountingthe Antenna. .... ....6 Installingthe BeltClip 6 Operation 7 Simplex/Duplex Communication... 7 low Batterylevel Detection 8 Care and Maintenance 8 Replacingthe Rechargeable Battery 8 Troubleshooting 9 Service 9 UHFCB Channel Information ...10 Specifications 11 UH-O53 1
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Introduction Congratulations on your purchase of the Sundowner UH-O53. This 16-channel personal UHF-CB 2-way radio represents a great value in professional portable communications. You'll find that it provides reliable, consistent performance for short-distance 2-way personal communications. The Sundowner UH-O53 is designed to operate in simplex mode on CH 1 to CH 16 or duplex mode on CH 1 to CH8 where repeater service is available. Warning! The Citizens Band Radio Communication Service (CBRS) i
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Feature Hi~hts .One - Watt Power - Reliable short range 2 - waycommunication. .Simplex/Duplex - Communication - Allows the UH-oS3 to operate via a repeater station. .16 - Channel Capability - Uses any of the first 16 Channels of the UHF CB Band. .LED Message Indicators - instantly see when the radio is transmitting, the channel is busy, or the battery is Iow. .Rechargeable Nickel - Cadmium Battery - Eliminates the costly expense of frequently purchasing replacement batteries. . AC Adaptor/Charge
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Controls and Indicators On-Off/ VolumeControl - Use to turn the radioon or off,and to adjustthe volumelevel. SquelchControl- Useto eliminatebackground noise (the "rushing" sound) heard between transmissions. Channel Selector - Rotate this knob to select the desired channel. Simplex/Duplex Switch - Selects Simplex or Duplex. Communication on CH 1 to CH8. Antenna Connector - Screw the flexibleantenna into this TNC-type connector. Speaker/Microphone Jacks - Plug the optional Remote Speaker/Micropho
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1Dden" """""""""'" '" '" 0 0 ~.;' .;' I BUILT-IN '" 0 0 0 0 0 '" SPEAKER PTT "'00000'" SWITCH 1 '" 0 0 0 0 0 '" BUILT-IN '" '" 0 0 0 "' ti MICROPHONE l::J". .~ ~ TXlBATT. LO ~ I BUSY L- INDICATOR a,) c Et 0 "0 C ::a "".ONAL UHI'Z-WAY Cl) RADIO PIT (Press- To-Talk) Switch - Press to transmit. TXlBAIT Le Indicator - This red LED lights when you press the PIT switch to transmit. The LED blinks when the battery is Iow and needs recharging. BUSY Indicator - This amber LED lights when the signal being
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To charge the nickel-cadmium battery: Using the AC Adaptor/Charger 1. Plug the AC adaptor/Charger into the Charging Jack located on top of the unit. WARNING! Use only the supplied AC Adaptor/Charger. Any other AC Adaptor or external power plug having over-voltage or reversed polarity can cause overheating or damage to the circuitry. 2. Plug the charger into a standard AC outlet. " To fully charge the battery, leave the Adaptor/ Charger connected for between 9 and 11 hours. Note: Switch OFF the u
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Qperation Note: Before operating the UH-oS3 for the first time, make sure you have fully charged the battery. 1. Turn the UH-oS3 on by rotating the On-OffNolume Control clockwise until you hear a click. 2. Adjust the Volume Control to a comfortable level. 3. Turn the Squelch Control fully counter- clockwise. You will hear background noise, and the BUSY Indicator will light. Turn the Squelch Control just until the background noise disappears and the BUSY Indicator goes out. At this setting, the r
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Low Battery Level Detection Uniden Sundowner UH-oS3 has a built-in battery level detector circuit. It evaluates your Battery Pack everytime you transmit to determine whetherthe power inside the Battery is still sufficient enough to support normal Receive and Transmit communications. When the PTT switch is pressed and the TX LED blinks. It means the battery level is already Iow and needs recharging. Under this condition, the unit no longer transmits RF Power. Have your battery charged fully or re
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Troubleshooting Problem Suggestion Unit does not power Battery voltage is Iow. on. or Recharge, replace with a new one. No or reception Adjust the squelch and volume. poor reception. Antenna is not properly connected. Battery voltage is Iow. or Recharge, replace with a new one. No transmission. You be out of may range of the receiving party. Remember, this radio is used only for short distance communication. are the If you using optional Speaker /M icrophone, make sure it is properly connected.
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UHF CB CHANNEL INFORMATION Operating Mode SIMPLEX DUPLEX CH RX TX RX TX (MHz) (MHz) (MHz) (MHz) 1 476.425 476.425 476.425 477.175 2 476.450 476.450 476.450 477.200 3 476.475 476.475 476.475 477.225 4 476.500 476.500 476.500 477.250 5 476.525 476.525 476.525 477.275 6 476.550 476.550 476.550 477.300 7 476.575 476.575 476.575 477.325 8 476.600 476.600 476.600 477.350 9 476.625 476.625 476.625 476.625 10 476.650 476.650 476.650 476.650 11 476.675 476.675 476.675 476.675 12 476.700 476.700 476.700 4
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S~ecifications General Channel: 16 (PLL) Frequency Range: Simplex 476.425 MHz to 476.800 MHz Duplex (TX) 477.175 MHz to 477.350 MHz Antenna Connector: TNC type Size: 150 mm(H) x 41 mm(D) x 63 mm(W) Weight: 410 g Speaker: 16Q, O.4W max Microphone: Built-in Electret type SMAS250 Approvals: Transmitter Frequency ::!:500Hz (nominal) Tolerance at 25°C: ::!:5PPM Frequency Stability oac to +55°C: Carrier Power 1W Spurious Emission -30 dBm (or Better) Modulation Frequency Response (1 kHz REF) 500 Hz: -6
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Receiver 12dB SINAD Sensitivity: 0.2511 V SquelchSensitivity Threshold: 0.251lV 1!lV Tight: Audio Frequency Response (1 kHz REF) 500 Hz: +3 dB 2000 Hz: -6 dB AdjacentChannel Selectivity 55 dB (:!:25kHz) Image Rejection (1st& 2nd): 40 dB Hum& Noise Ratio 38 dB THD at Standard Output Power: 3 % Audio Output Power at 10% THD: 0.25 W Maximum Audio 0.5W Output Power: Oscillator Dropout Voltage: 6 V (max.) Standby Current Drain: 40mA Current Drain at Maximum Audio Output: 250 mA Specifications shown a
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WARRANTY Uniden Sundowner UH-o53 16-Channel Personal UHF 2-Way Radio Australian 1 Year Warranty Note: Please keep your sales docket as it provides evidence of warranty. WARRANTOR: Uniden Australia Pty. Umited ACN 001 865498 ELEMENTS OF WARRANTY: Uniden warrants to the original retail owner for the duration of this warranty, its Sundowner UH- 053 16-Ghannel Personal UHF 2-Way Radio (hereinafter re- ferred to as the Product), to be free from defects in materials and craftsmanship with only the lim
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