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18

Conventional Scanning

Conventional scanning is a relatively simple concept. Each 
group of users in a conventional system is assigned a single 
frequency (for simplex systems) or two frequencies (for 
repeater systems). Any time one of them transmits, their 
transmission always goes out on the same frequency. Up 
until the late 1980’s this was the primary way that radio 
systems operated. 
Even today, there are many 2-way radio users who operate 
using a conventional system: 

• 

Aircraft 

• 

Amateur radio 

• 

FrS/GMrS users 

• 

Broadcast AM/FM/TV stations 

• 

Many business radio users 

When you want to store a conventional system, all you need 
to know are the frequencies they operate on. When you 
are scanning a conventional system, the scanner stops very 
briefly on each channel to see if there is activity. if there isn’t, 
the scanner quickly moves to the next channel. if there is, 
then the scanner pauses on the transmission until it is over. 

Simplex Operation

Simplex systems use a single frequency for both transmit 
and receive. Most radios using this type of operation 
are limited to line-of-sight operation. This type of radio 
is frequently used at construction job sites and with 
inexpensive consumer radios such as GMrS/FrS radios. The 
range is typically 1-8 miles, depending upon the terrain and 
many other factors. 

Содержание BC75XLT

Страница 1: ...BC75XLT Owner s Manual 2012 Uniden America Corporation Printed in Vietnam Fort Worth Texas U01UB372ZZZ 0 BC...

Страница 2: ...bited regulated or require a permit in certain states cities and or local jurisdictions Your local law enforcement officials should be able to provide you with information regarding the laws in your c...

Страница 3: ...he monaural earphone or headset Otherwise you might experience some discomfort or possible hearing damage if the volume suddenly becomes too loud because of the volume control or squelch control setti...

Страница 4: ...nventional Scanning 18 Simplex Operation 18 Repeater Operation 19 What Are Banks 19 Channel Storage Banks 19 Service Search Bands 19 Custom Search Ranges 20 Where To LEARN MORE 20 Setup 21 What s In T...

Страница 5: ...Scroll Control Knob 31 LCD Display 32 Operation 35 SearchING 35 Quick Search 35 Custom Search 36 Service Search 37 Storing Frequencies 38 Erasing a Stored Frequency 39 Scanning 39 Enabling Disabling...

Страница 6: ...elay 47 Keylock 48 Backlight 49 PC Programming 49 TROUBLESHOOTING 50 Care and Maintenance 53 Resetting the Scanner 53 General Use 53 Location 53 Cleaning 54 Repairs 54 Birdies 54 Specifications 56 One...

Страница 7: ...This scanner generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However ther...

Страница 8: ...al transmission Pager transmissions Any scrambled or encrypted transmissions According to the Electronic Communications Privacy Act ECPA you are subject to fines and possible imprisonment for intentio...

Страница 9: ...ur FCC authorization to operate it In some areas mobile use of this scanner is unlawful or requires a permit Check the laws in your area It is also illegal in many areas and a bad idea everywhere to i...

Страница 10: ...bands for your convenience You can quickly search those frequencies most commonly used by police and other agencies without tedious and complicated programming The scanner gives you direct access to o...

Страница 11: ...er to skip over specified channels or frequencies when scanning or searching You must manually unlock these channels Temporary Lock Out Function lets you set your scanner to skip over specified channe...

Страница 12: ...that are made on the same channel Do Not Disturb prevents the scanner from interrupting transmissions during receiving Ten Service Bands frequencies are preset in separate Weather Police Fire Emergenc...

Страница 13: ...y low tone sounds every 15 seconds until the scanner is recharged turned off or drained completely Battery Save works when there is no transmission for 1 minute in Scan Hold mode and in any Search Hol...

Страница 14: ...pressing and holding 1 for USA or 2 for Canada The band plan will remain until you change it again USA Band Plan Frequency Range MHz Step kHz Mode Transmission 25 00000 27 99500 5 0 AM Citizens Band...

Страница 15: ...4 52500 5 0 NFM 154 52750 154 53500 7 5 NFM 154 54000 154 60750 7 5 NFM 154 61000 154 64750 7 5 NFM 154 65000 157 44750 7 5 NFM 157 45000 157 46500 5 0 NFM 157 47000 163 24500 7 5 NFM 163 25000 173 20...

Страница 16: ...ep kHz Mode Transmission 25 00000 27 99500 5 0 AM Citizens Band Business Band 28 00000 54 00000 5 0 NFM 10 Meter Amateur Band 108 00000 136 99166 8 33 AM Aircraft Band 137 00000 174 00000 5 0 NFM Mili...

Страница 17: ...ion continues When the transmission ends the scanning cycle resumes until it receives another transmission on a programmed channel What is Searching The BC75XLT searches for active frequencies This is...

Страница 18: ...radio users When you want to store a conventional system all you need to know are the frequencies they operate on When you are scanning a conventional system the scanner stops very briefly on each ch...

Страница 19: ...y high there is a very large line of sight Typical repeater systems provide coverage out to about a 25 mile radius from the repeater location What Are Banks Channel Storage Banks To make it easier to...

Страница 20: ...ke turning off disabling channel storage banks in Scan mode Custom search ranges use the same LCD numbers on the display as the 10 channel storage banks see page 32 Where To LEARN MORE By itself this...

Страница 21: ...enna Belt Clip attached Not shown USB cable Strap Owner s Manual If any of these items are missing or damaged immediately contact your place of purchase or Uniden Customer Service at 800 297 1023 8 00...

Страница 22: ...lockwise until it locks into place The scanner s BNC connector makes it easy to connect a variety of optional antennas including an external mobile antenna or outdoor base station antenna Note Always...

Страница 23: ...shorting the audio amplifier and reducing volume WARNING If you connect an external speaker to the scanner s headphone jack never connect the audio output line to a power supply and ground This might...

Страница 24: ...y electronic circuits Do not mix old and new batteries different types of batteries standard alkaline or rechargeable or rechargeable batteries of different capacities Installing Non Rechargeable Batt...

Страница 25: ...ries through USB Connection The scanner has a built in circuit to charge the Ni MH batteries when a USB cable connects it to a computer NOT to a USB hub or to an AC or DC adapter that provides USB cha...

Страница 26: ...s the batteries The screen goes blank after the scanner is completely charged Different status messages may display depending on the battery type and scanner status LCD Message Batt Type Meaning Scann...

Страница 27: ...anner automatically shuts off until the battery is recharged Turn On The Scanner Turn on the scanner after it has been completely charged Ni MH batteries or alkaline batteries have been installed Note...

Страница 28: ...nob SqL and a number display 2 Turn the knob until the interference is gone Press the scroll control knob again to set the level and return to the previous function Adjusting for Interference There ar...

Страница 29: ...splay Press the next key in the function key sequence while F displays F appears or disappears as you press Func If your scanner s keys seem confusing at first the following information should help yo...

Страница 30: ...through preprogrammed service bands see page 37 L O Temporarily or permanently lockout a channel or frequency see page 44 Locks the keypad see page 48 Turn scanner on and off Turns display backlight o...

Страница 31: ...Func Sets scanner in Function mode Cancels Function mode Scroll Control Knob Scroll control knob Audio output Antenna The scroll control knob has three uses Sel Turn the knob to cycle through selecti...

Страница 32: ...the scanner s current operating status The display information helps you understand how your scanner operates Line Display Description 1 B 1 10 Search mode Custom Search range Scan mode Channel bank...

Страница 33: ...Not Disturb Displays and blinks when the battery power gets low Displays when the rechargeable batteries are charging T L O L O Indicates a locked out frequency T L O Temporary Lock Out L O Lock Out...

Страница 34: ...an Displays when you scan channels Hold Displays during Scan Hold and Search Hold modes WX AIR FIRE HAM POL RAIL MRN CB RACE OTHER Service bands These will display with an indicator for the current se...

Страница 35: ...nge s corresponding number to turn it off and back on For example press 4 to turn search range 4 off The number 4 will no longer display across the top of the screen You can search these ranges throug...

Страница 36: ...h You can adjust each preset search range s upper and lower frequency limits 1 Press Func Psrc The scanner enters Custom Search mode and displays SRCH and PGM The upper and lower frequencies for Custo...

Страница 37: ...bands To select a different service search repeatedly press Svc as long as you are still in Function mode If you are not in Function mode press Func to return and then press Svc Services are scanned...

Страница 38: ...st of frequencies in your area You can also store frequencies directly into a specific channel in a specific channel bank 1 From Search or Scan modes press Hold 2 Press Func Pgm The scanner displays t...

Страница 39: ...hose channels are grouped into banks Each bank contains 30 channels You can store service channels and non service channels in the same bank For example you can store a city s fire police marine etc t...

Страница 40: ...the scanner finds a transmission it stops on it When the transmission ends the scanner resumes scanning Notes If you have not stored frequencies into any channels the scanner does not scan If the scan...

Страница 41: ...r and press Hold again The scanner moves to the frequency stored in that channel During scanning if the radio stops at a channel you want to listen to press Hold once Rotate the scroll control knob to...

Страница 42: ...ices etc Close Call mode might not find the transmission you are searching for or it might find a transmission other than the one you are searching for Close Call mode works well for finding frequenci...

Страница 43: ...detects a frequency Program alert tones through your PC see page 49 Notes Close Call RF capture cannot detect frequencies outside the scanner s normal operating range Close Call mode works better with...

Страница 44: ...quelch tight where only strong signals are received while using the Close Call feature To continue scanning normally while the Close Call feature is working simply press Scan When the scanner finds a...

Страница 45: ...the temporarily locked out channel press Hold 2 Press L O until the locked out status no longer displays 3 Press Hold again to return to Scan or Search modes You can also turn the scanner off and back...

Страница 46: ...es for Permenant Lockout 200 locked out frequencies total After locking out 200 frequencies the next time you try to select a frequency to skip the scanner displays Full and will not lock out that fre...

Страница 47: ...Priority channel 2 Press Func Pgm then press Func Pri P appears to the left of the selected channel number 3 Repeat Steps 1 and 2 for other channels for each bank you want to program as a priority cha...

Страница 48: ...to program a delay quickly press Func Dly before it continues scanning again DLY appears If the desired channel is not selected manually select the channel then press Func Dly DLY appears If the scann...

Страница 49: ...play light on and off It remains on for 15 seconds and then turn off automatically PC Programming Connect your scanner to your PC through the USB cable to Program channels into the scanner Set any set...

Страница 50: ...the USB cable is connected to the PC and to the scanner Improper reception The scanner s antenna might need to be adjusted Check the antenna connection or move or reposition the antenna Move the scann...

Страница 51: ...antenna connection One or more channels might be locked out Make sure the channels you want to scan are not locked out The channel s frequency might not be stored in memory Make sure the channel s fre...

Страница 52: ...hold See page 28 One or more channels might be locked out Make sure the channels you want to scan are not locked out The antenna might need to be adjusted Check the antenna connection Weather scan doe...

Страница 53: ...le holding down 2 9 and Hold turn on the scanner It takes about 3 seconds to initialize and CLEAr appears General Use Turn the scanner off before disconnecting the power Always write down the programm...

Страница 54: ...cleaning Clean the outside of the scanner with a mild detergent To prevent scratches do not use abrasive cleaners or solvents Be careful not to rub the LCD window Do not use excessive amounts of wate...

Страница 55: ...lease call or write the Uniden Parts and Service Division The address and phone number are listed in the Warranty at the end of this manual If you would like immediate assistance please call Customer...

Страница 56: ...MHz NFM 0 2 V 53 980 MHz NFM 0 2 V 118 800 MHz AM 0 3 V 127 175 MHz AM 0 3 V 135 500 MHz AM 0 3 V 138 150 MHz NFM 0 3 V 157 100 MHz FM 0 2 V 161 985 MHz NFM 0 3 V 173 225 MHz NFM 0 3 V 406 875 MHz NF...

Страница 57: ...utput Internal Speaker 360mW nominal 24 ohm Headphone L ch 4mW nominal 32 ohm Current Drain Squelched 120 mA Full Output 280 mA Power Requirements 2 AA Alkaline Batteries 3V DC or 2 AA Rechargeable Ni...

Страница 58: ...s or as part of any system not manufactured by Uniden or F installed or programmed by anyone other than as detailed by the Operating Guide for this product STATEMENT OF REMEDY In the event that the pr...

Страница 59: ...rating Guide you are certain that the Product is defective pack the Product carefully preferably in its original packaging Include evidence of original purchase and a note describing the defect that h...

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