Radio Shack 20-566 Owner'S Manual Download

Page: 55 / 56

Squelch Sensitivity:

Threshold ...................................... Less than 1.0

Tight ................................................. (S+N)/N 25 dB

Antenna Impedance ......................................... 50 Ohms

Audio Output Power (10% THD) ......... 200 mW Nominal

Built-in Speaker ................................... 1

Inch (36 mm)

8 ohm, Dynamic Type

Power Requirements .................. 9 V DC, 6 AA batteries

AC Adapter (Cat. No. 273-1665)

DC Adapter (Cat. No. 270-1560)

Rechargeable Battery Pack (Cat. No. 23-288)

Current Drain (Squelched) .....................................50 mA

Dimensions (HWD) .................. 6

Inches

(171

40 mm)

Weight ................................................................... 8.5 oz

(240 g)

Supplied Accessory ........................................... Antenna

Specifications are typical; individual units might vary.
Specifications are subject to change and improvement
without notice.

US PATENT NUMBERS

3,794,925
3,801,914
3,961,261
3,962,644
4,027,251
4,092,594
4,123,715
4,245,348

20-566.fm Page 55 Thursday, August 5, 1999 8:04 AM

Summary of Contents for 20-566

Page 1: ...OWNER S MANUAL PRO 72 50 Channel Portable Scanner Please read before using this equipment Cat No 20 566 20 566 fm Page 1 Thursday August 5 1999 8 04 AM ...

Page 2: ...teresting frequencies more quickly Ten Preprogrammed Weather Frequencies keep you informed about current weather conditions HyperScan and HyperSearch so you can scan up to 25 channels per second and search up to 50 steps per second Fifty Channels let you store up to 50 of your favorite frequencies for easy recall and scanning Duplicate Frequency Check automatically warns you if you try to store a ...

Page 3: ...s it easy to at tach and remove the antenna or a variety of optional antennas Liquid Crystal Display clearly displays how the scan ner is set and makes it easy to change those settings Display Backlight makes the scanner s display easy to read in low light situations Three Power Options you can power the scanner from internal batteries not supplied including non rechargeable batteries rechargeable...

Page 4: ...blic Service Trunked Ser vices 849 869 MHz UHF Hi Trunked Services 894 960 MHz UHF Hi 33 Centimeter Amateur Radio Trunked Services For a list of the frequency ranges in the ten prepro grammed search bands see Search Bands on Page 24 In addition your scanner is preprogrammed with the fol lowing weather service frequencies 161 6500 MHz 161 7750 MHz 162 4000 MHz 162 4250 MHz 162 4500 MHz 162 4750 MHz...

Page 5: ...ur scanner away from the TV or radio Connecting your scanner to an outlet that is on a dif ferent electrical circuit from the TV or radio Contacting your local RadioShack store for help This device complies with Part 15 of the FCC Rules Op eration is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received incl...

Page 6: ... should never intentionally listen to These include Telephone conversations either cellular cordless or other private means of telephone signal transmission Pager transmissions Any scrambled or encrypted transmissions According to the Electronic Communications Privacy Act ECPA you are subject to fines and possible imprison ment for intentionally listening to using or divulging the contents of such...

Page 7: ...8 Your Scanner 19 A Look at the Keypad 20 A Look at the Display 22 Understanding Bands Monitor Memory 24 Search Bands 24 Monitor Memory 25 Operation 26 Turning On the Scanner Setting Volume and Squelch 26 Storing Active Frequencies 27 Manually Storing Frequencies 27 Band Search 29 Direct Search 31 Moving a Frequency from the Monitor Memory to a Channel 32 Monitoring a Stored Channel 32 Scanning th...

Page 8: ...ather Frequencies 39 Ham Radio Frequencies 39 Birdie Frequencies 40 Guide to the Action Bands 41 United States Broadcast Bands 41 Typical Band Usage 41 Primary Usage 42 Specified Intervals 43 Band Allocation 43 Frequency Conversion 47 Troubleshooting 48 Resetting Initializing the Scanner 50 Resetting the Scanner 50 Initializing the Scanner 51 Care and Maintenance 52 Specifications 54 20 566 fm Pag...

Page 9: ...echargeable battery pack you can operate the scanner and recharge the battery pack at the same time See Using Batteries below and Charging a Rechargeable Battery Pack on Page 14 If the scanner stops working properly after you con nect it to power try resetting it See Resetting Initial izing the Scanner on Page 50 Using Batteries You can power your scanner from six AA batteries For the longest oper...

Page 10: ...you can use your scanner see Charging a Rechargeable Battery Pack on Page 14 Caution Do not mix old and new batteries different types of batteries standard alkaline or rechargeable or re chargeable batteries of different capacities Follow these steps to install batteries or a battery pack 1 Press down on the battery compartment cover on the bottom of the scanner and slide the cover in the directio...

Page 11: ...older or battery pack fits only one way inside the battery compartment Do not force it 5 Replace the cover When battery power is low BATT flashes and the scanner beeps about every 3 seconds Immediately replace all six non rechargeable batteries remove and recharge all six rechargeable batteries or recharge the battery pack Caution Always dispose of old batteries promptly and properly Do not bury o...

Page 12: ... not meet these specifications could damage the scanner or the adapter When you finish using the AC adapter disconnect it from the AC outlet first Then disconnect it from the scanner Plug the adapter s 1 3 mm inner diameter 3 4 mm outer di ameter barrel plug into the scanner s PWR DC 9V jack Then plug the adapter s power module into a standard AC outlet Warning Do not use an AC adapter s polarized...

Page 13: ...e scanner or the adapter To protect your vehicle s electrical system always plug the adapter into the scanner before you plug it into your vehicle s cigarette lighter socket Always unplug the adapter from the vehicle s cigarette lighter socket before you unplug it from the scanner 1 Connect the DC adapter s supplied 1 3 mm inner diameter 3 4 mm outer diameter barrel plug to the cable with the tip ...

Page 14: ...ct an AC or DC adapter to the scanner s PWR DC 9V jack It takes about 14 16 hours to recharge a battery pack that is fully discharged You can operate the scanner while re charging the battery pack but charging takes longer Notes If you want to take the battery pack out of the scan ner to charge it follow the instructions in Using Bat teries on Page 9 to remove it then follow the instructions provi...

Page 15: ...able are municipal curb side collection drop off boxes at retailers such as your local RadioShack store recycling collection centers and mailback programs CONNECTING THE ANTENNA Follow these steps to attach the supplied flexible antenna to your scanner 1 Align the slots around the antenna s connector with the tabs on the ANT jack 2 Press the antenna down over the jack and turn the antenna s base c...

Page 16: ...Shack store Follow the installation instructions supplied with the anten na route the antenna cable to the scanner then connect it to the ANT jack Warning Use extreme caution when installing or remov ing an outdoor base station antenna If the antenna starts to fall let it go It could contact overhead power lines If the antenna touches a power line contact with the antenna mast cable or guy wires c...

Page 17: ... level so a vol ume level that does not cause discomfort might still damage your hearing Traffic Safety Do not use an earphone or headphones with your scanner when operating a motor vehicle or riding a bicycle in or near traffic Doing so can create a traffic hazard and could be illegal in some areas If you use an earphone or headphones with your scanner while riding a bicycle be very careful Do no...

Page 18: ...21 541 might provide more comfortable listening Plug the speaker cable s 1 8 inch plug into your scanner s jack USING THE BELT CLIP You can use the belt clip for hands free carrying when you are on the go Simply slide the belt clip over your belt or waistband Belt Clip 20 566 fm Page 18 Thursday August 5 1999 8 04 AM ...

Page 19: ...h function to search bands which are preset ranges of frequencies When you find a frequency you can store it into a perma nent memory location called a channel You can then scan the channels to see if there is activity on the frequen cies stored there Each time the scanner finds an active frequency it stays on that channel until the transmission ends Another option is to store the frequency into a...

Page 20: ...n nels BAND selects a preprogrammed search band SCAN scans through the programmed channels MANUAL stops scanning to let you directly enter a channel number searches down or up from the currently dis played frequency or selects the direction when you scan channels CLEAR clears an incorrect entry PGM lets you program frequencies into channels 20 566 fm Page 20 Thursday August 5 1999 8 04 AM ...

Page 21: ...nel or frequency MON 0 enters a zero or accesses the monitor memory DLY delay decimal point programs a 2 second delay for the selected channel or enters a decimal point neces sary when programming frequencies L OUT E lockout enter locks out channels so they will not be scanned or enters frequencies into channels 20 566 fm Page 21 Thursday August 5 1999 8 04 AM ...

Page 22: ...eather channels MON appears when you listen to the monitor memory BATT appears when battery power is low L O appears when you manually select a channel you locked out SRCH appears during a band or direct frequency search or indicates the search or scan direction DELAY appears when you program a 2 second delay for a channel PGM appears while you program frequencies into the scanner s channels 20 56...

Page 23: ...pears during a direct frequency search 000 0000 the digits on the right of the display show which frequency the scanner is tuned to Error appears when you make an entry error dUPL duplicate appears when you try to store a fre quency that is already stored in another channel 20 566 fm Page 23 Thursday August 5 1999 8 04 AM ...

Page 24: ...s between 824 849 MHz and 869 894 MHz to help prevent reception of transmissions you should not listen to For more information see Scanning Legally on Page 6 Band Displayed Search Range MHz Description 0 29 50 10 Meter Amateur Radio VHF Lo 1 50 54 6 Meter Amateur Radio 2 137 144 Aircraft Air Shows Government 3 144 148 2 Meter Amateur Radio 4 148 174 VHF Hi 5 380 420 Government 6 420 450 70 Centime...

Page 25: ...missions Bands 0 1 3 and 6 See Band Search on Page 29 Note The frequencies in the scanner s search bands are preset You cannot change them Monitor Memory The scanner also has a monitor memory that you can use to temporarily store a frequency while you decide whether to save it into a channel This is handy for quickly storing an active frequency when you are searching through an entire band using d...

Page 26: ...e until the hissing sound stops Notes If the scanner picks up unwanted partial or very weak transmissions turn SQUELCH clockwise to decrease the scanner s sensitivity to these signals If you want to listen to a weak or distant station turn SQUELCH counterclockwise If SQUELCH is adjusted so you always hear a hissing sound the scanner does not scan properly OFF MAX MIN MAX VOLUME SQUELCH OFF MAX MIN...

Page 27: ...or active frequencies are the RadioShack Police Call Radio Guide Including Fire and Emergency Services Aeronautical Frequency Directory and Maritime Frequency Directory We update these directories every year so be sure to get a current copy If you do not have a reference to frequencies in your area follow the steps in Band Search on Page 29 or Direct Search on Page 31 to search for transmissions S...

Page 28: ...el number flashes and the scanner beeps three times after you press E Simply repeat Steps 3 and 4 Your scanner automatically rounds the entered frequency down to the nearest valid frequency For example if you enter a frequency of 151 4730 your scanner accepts it as 151 4700 If you entered a frequency that is already stored in another channel dUPL duplicate and the lowest numbered channel containin...

Page 29: ... 1 Press BAND The last selected band number b fol lowed by the band number and the frequency search range appear for about 2 seconds 2 To select a different band within 2 seconds enter the band s number 0 9 or repeatedly press BAND until the desired band number appears After about 2 seconds SRCH appears the next available channel flashes and the scanner begins searching rapidly upward in that band...

Page 30: ...e channel cur rently flashing on the display press E The scanner stores the frequency then the next available channel flashes Notes You cannot store a frequency in the monitor mem ory during band search After you store a frequency into the last available channel ch appears instead of a channel number If you try to store a channel while ch appears Ch FULL appears briefly In order to store more freq...

Page 31: ...already stored in one of your scanner s channels press MANUAL or PGM enter the desired channel number then press MAN UAL or PGM again 2 Hold down or for about 1 second to search up or down from the selected frequency When the scanner finds an active frequency it stops searching 3 To store the frequency in the monitor memory simply press MON 0 MON appears on the display 4 To continue the search hol...

Page 32: ...annel number stops flashing and the scanner stores the frequency in the selected channel MONITORING A STORED CHANNEL You can continuously monitor a specific channel without scanning This is useful if you hear an emergency broad cast on a channel and do not want to miss any details even though there might be periods of silence or if you simply want to monitor that channel Follow these steps to manu...

Page 33: ...canner finds an active frequency it stops and dis plays that channel and frequency number then it automat ically begins scanning again when the transmission ends on that frequency Notes You must store frequencies into channels before the scanner can scan them see Storing Active Fre quencies on Page 27 To change the scanning direction press or The scanner does not scan empty channels 20 566 fm Page...

Page 34: ...ber containing the frequency you want to delete then press PGM Or repeatedly press PGM until the desired channel number appears PGM appears 3 Press CLEAR The frequency number flashes 4 Press L OUT L O lockout see Locking Out a Channel on Page 36 appears the channel number flashes and the frequency number changes to 000 0000 to indicate the frequency is cleared 5 To delete more frequencies repeat S...

Page 35: ...hannels To hear your local forecast and regional weather informa tion simply press WX Your scanner scans through the weather band and and WX appear Your scanner should stop within a few seconds on your local weather broadcast If the broadcast is weak press or to resume scan ning To reverse the scanning direction press or To manually select a specific preprogrammed weather channel repeatedly press ...

Page 36: ...If the scanner is scanning and stops on an active channel quickly press DLY before it starts to scan again If the desired channel is not selected manually select the channel then press DLY If the scanner is searching press DLY during the search DELAY appears and the scanner automatically adds a 2 second delay to every transmission it stops on To turn off the delay press DLY when DELAY is displayed...

Page 37: ...d out channels Your scanner automatically locks out empty chan nels USING THE DISPLAY BACKLIGHT You can turn on the display s backlight for easy viewing in dimly lit areas Press LIGHT to turn on the display light for 5 seconds To turn off the light before it automatically turns off press LIGHT again 20 566 fm Page 37 Thursday August 5 1999 8 04 AM ...

Page 38: ...3 After 1 second release 2 and E USING THE KEYLOCK Once you program your scanner you can protect it from accidental program changes by turning on the keylock feature When the keypad is locked the only controls that operate are LIGHT VOLUME and SQUELCH and the scanner continues to scan channels To turn on the keylock hold down for about 3 sec onds until appears The scanner beeps three times if the ...

Page 39: ...io operators often transmit emergency informa tion when other means of communication break down The following chart shows the frequencies the scanner re ceives that Ham radio operators normally use 162 400 162 425 162 450 162 475 162 500 162 525 162 550 161 650 161 775 162 440 163 275 Wavelength meters Frequencies MHz 10 Meter 29 000 29 700 6 Meter 50 000 54 000 2 Meter 144 000 148 000 70 cm 420 0...

Page 40: ... antenna and moving it away from the scanner Make sure that no other nearby radio or TV sets are turned on near the scanner Use the search function and scan every frequency range from its lowest frequency to the highest Occasionally the searching will stop as if it had found a signal often without any sound That is a birdie Make a list of all the birdies in your scanner for future reference 30 735...

Page 41: ...6 Meter Amateur 50 00 54 00 MHz U S Government 137 00 144 00 MHz 2 Meter Amateur 144 00 148 00 MHz High Range 148 00 174 00 MHz UHF Band Military Aircraft 380 00 384 00 MHz U S Government 406 00 420 00 MHz 70 cm Amateur 420 00 450 00 MHz Low Range 450 00 470 00 MHz FM TV Audio Broadcast Wide Band 470 00 512 00 MHz 800 Band Law Enforcement 806 00 824 00 MHz Conventional Systems 851 00 856 00 MHz Co...

Page 42: ...ons and relay repeater units Activities Frequencies Government Police and Fire 153 785 155 980 MHz Emergency Services 158 730 159 460 MHz Railroad 160 000 161 900 MHz Activities Frequencies Land Mobile Paired Frequencies 450 000 470 000 MHz Base Stations 451 025 454 950 MHz Mobile Units 456 025 459 950 MHz Repeater Units 460 025 464 975 MHz Control Stations 465 025 469 975 MHz 20 566 fm Page 42 Th...

Page 43: ...usiness CAP Civil Air Patrol CB Citizens Band CCA Common Carrier CSB Conventional Systems CTSB Conventional Trunked Systems FIRE Fire Department HAM Amateur Ham Radio GOVT Federal Government GMR General Mobile Radio GTR General Trunked IND Industrial Services Manufacturing Construction Farming Forest Products MAR Military Amateur Radio MARI Maritime Limited Coast Coast Guard Marine Telephone Shipb...

Page 44: ...Classified UTIL Power Water Utilities WTHR Weather VERY HIGH FREQUENCY VHF VHF Low Band in 5 kHz steps 29 900 30 550 GOVT MIL 30 580 31 980 IND PUB 32 000 32 990 GOVT MIL 33 020 33 980 BUS IND PUB 34 010 34 990 GOVT MIL 35 020 35 980 BUS PUB IND TELM 36 000 36 230 GOVT MIL 36 250 Oil Spill Cleanup 36 270 36 990 GOVT MIL 37 020 37 980 PUB IND 38 000 39 000 GOVT MIL 39 020 39 980 PUB 40 000 42 000 G...

Page 45: ... PUB 156 255 157 425 OIL MARI 157 450 MED 157 470 157 515 TOW 157 530 157 725 IND TAXI 157 740 BUS 157 770 158 100 TELB 158 130 158 460 BUS IND OIL TELM UTIL 158 490 158 700 TELB 158 730 159 465 POL PUB ROAD 159 480 OIL 159 495 161 565 TRAN 161 580 162 000 OIL MARI RTV 162 0125 162 35 GOVT MIL USXX 162 400 162 550 WTHR 162 5625 162 6375 GOVT MIL USXX 162 6625 MED 162 6875 163 225 GOVT MIL USXX 163...

Page 46: ...00 BUS 458 025 458 175 MED 460 0125 460 6375 FIRE POL PUB 460 650 462 175 BUS 462 1875 462 450 BUS IND 462 4625 462 525 IND OIL TELM UTIL 462 550 462 925 GMR BUS 462 9375 463 1875 MED 463 200 467 925 BUS FM TV Audio Broadcast UHF Wide Band Channels 14 through 69 in 6 MHz steps 475 750 Channel 14 481 750 Channel 15 487 750 Channel 16 511 750 Channel 20 Note Some cities use the 470 512 MHz band for ...

Page 47: ... quency kHz or MHz or in wavelength meters The fol lowing information can help you make the necessary conversions 1 MHz million 1 000 kHz thousand To convert MHz to kHz multiply the number of megahertz by 1 000 30 62 MHz x 1000 30 620 kHz To convert from kHz to MHz divide the number of kilo hertz by 1 000 127 800 kHz 1000 127 8 MHz To convert MHz to meters divide 300 by the number of megahertz 300...

Page 48: ...C out let or cigarette lighter socket and is fully inserted into the scanner s PWR DC 9V jack The internal batter ies battery pack needs to be re charged or the non rechargeable batteries are dead Charge the re chargeable batter ies or battery pack or replace non rechargeable batteries with fresh batteries Poor or no reception Improperly con nected antenna Be sure the anten na is properly con nect...

Page 49: ...e Scanner Setting Volume and Squelch on Page 26 In the scan mode the scanner locks on frequen cies that have an unclear transmission Programmed fre quencies are the same as birdie frequencies Avoid program ming frequencies listed under Bird ieFrequencies on Page 40 or only listen to them manually 20 566 fm Page 49 Thursday August 5 1999 8 04 AM ...

Page 50: ... scan ner however initializing clears all frequencies you stored in the scanner s memory and initializes the scanner to its default settings Resetting the Scanner 1 Turn off the scanner then turn it on again 2 Insert a pointed object such as a straightened paper clip into the reset hole on the side of the scanner Then gently press and release the reset button inside the opening The display goes bl...

Page 51: ...er then turn it on again 2 While holding down CLEAR insert a pointed object such as a straightened paper clip into the reset hole on the side of the scanner Then gently press and release the reset button inside the opening The dis play goes blank then information reappears Note You must release the reset button before you release CLEAR Otherwise the memory might not clear 3 When the display reappe...

Page 52: ...shorten the life of electron ic devices damage batteries and distort or melt plastic parts Keep the scanner away from dust and dirt which can cause premature wear of parts Handle the scanner gently and carefully Dropping it can damage circuit boards and cases and can cause the scanner to work improperly Use only fresh batteries of the required size and type Batteries can leak chemi cals that damag...

Page 53: ... can cause a malfunction and might invalidate your scanner s warranty and void your FCC authorization to op erate it If your scanner is not performing as it should take it to your local RadioShack store for assistance 20 566 fm Page 53 Thursday August 5 1999 8 04 AM ...

Page 54: ...Hz steps 849 860 MHz in 12 5 kHz steps 894 960 MHz in 12 5 kHz steps Channels of Operation 50 Channels and 1 Monitor Memory Sensitivity 20 dB S N 29 54 MHz 1 0 µV 137 174 MHz 1 0 µV 380 512 MHz 1 0 µV 806 960 MHz 2 0 µV Selectivity 10 kHz 6 dB 18 kHz 50 dB Spurious Rejection 29 54 MHz 50 dB at 40 MHz 137 174 MHz 50 dB at 154 MHz Scanning Rate Up to 25 channels second Search Rate Up to 50 steps sec...

Page 55: ...dapter Cat No 270 1560 Rechargeable Battery Pack Cat No 23 288 Current Drain Squelched 50 mA Dimensions HWD 63 4 25 16 19 16 Inches 171 59 40 mm Weight 8 5 oz 240 g Supplied Accessory Antenna Specifications are typical individual units might vary Specifications are subject to change and improvement without notice US PATENT NUMBERS 3 794 925 3 801 914 3 961 261 3 962 644 4 027 251 4 092 594 4 123 7...

Page 56: ...ion light ning or other incidence of excess voltage or current b any repairs other than those provided by a RadioShack Authorized Service Facility c con sumables such as fuses or batteries d cosmetic damage e transportation shipping or insurance costs or f costs of product removal installation set up service adjustment or reinstallation EXCEPT AS PROVIDED HEREIN RadioShack MAKES NO EXPRESS WARRANT...

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