Radio Shack 20-423 Owner's Manual
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Radio Shack 20-423 Owner's Manual

Radio Shack 20-423 Owner's Manual

200-channel vhf/air/uhf desktop scanner with wx alert
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20-423
A
Owner's Manual
Please read before using this equipment.

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Summary of Contents for Radio Shack 20-423

  • Page 1 20-423 Owner’s Manual Please read before using this equipment.
  • Page 2 1 hour during a power loss. HyperSearch and HyperScan you set the scanner to search at up to 50 steps per second and to scan at up to 25 channels per second, to help quickly find interesting transmissions.

  • Page 3: Scanning Legally

    To determine whether your scanner is causing the interference, turn off your scanner. If the interference goes away, your scanner is causing it. Try to eliminate the interference by: • moving your scanner away from the receiver •...

  • Page 4: Table Of Contents

    Channel Storage Banks ... 10 Service Banks ... 11 Operation ... 14 Turning On the Scanner/Setting Volume and Squelch ... 14 Storing Known Frequencies into Channels ... 14 Finding and Storing Active Frequencies ... 15 Searching the Service Banks ... 15 Using Direct Search ...
  • Page 5 Removing All Lockout Tags from Frequencies in All Service Banks ... 21 Using Priority ... 21 Turning the Key Tone On and Off ... 21 Using a Computer to Program the Scanner ... 22 Birdie Frequencies ... 22 United States Broadcast Band ... 22 Guide to the Action Bands ...

  • Page 6: Preparation

    2. Plug the adapter into a standard AC outlet. Using Vehicle Battery Power You can power the scanner from a vehicle’s 12V power source (such as cigarette-lighter socket) using a 12V, 300-mA DC cord and a size M Adaptaplug™ connector (neither supplied).

  • Page 7: Connecting An Antenna

    This is normal. • Mobile use of this scanner is unlawful or requires a permit in some areas. Check the laws in your area.

  • Page 8: Understanding Your Scanner

    A LOOK AT THE CONTROLS Some of the scanner’s keys perform more than one function (such as MON/CL) and are marked with more than one label. The steps in this Owner’s Manual show only the label on the key appropriate to the action being performed.

  • Page 9: A Look At The Display

    (Monitor/Clear) — accesses the 20 MON/CL monitor memories or clears an incorrect entry. A LOOK AT THE DISPLAY The display shows the scanner’s current operating mode. FD/PD — appears when you search the fire/ police service bank. — appears with numbers (1–10).

  • Page 10: Understanding Service Banks/Banks

    FLo ALL-CL — appears when you remove all the locked out frequencies during a service bank/direct search. — appears when the scanner is tuned to the priority channel. ALErt — appears when the scanner is watching the WX alert tone.

  • Page 11: Service Banks

    Service Banks The scanner is preprogrammed with the frequencies allocated by fire/police, aircraft, ham radio, and marine services. In these service banks, you can search through the frequencies and store them in channels for fire/police, aircraft, ham radio, and marine banks.
  • Page 12 156.9000 156.9500 157.0000/161.6000 157.0500 157.1000 157.1500 157.2000/161.8000 157.2500/161.8500 157.3000/161.9000 157.3500/161.9500 157.4000/162.0000 Channel Frequency (MHz) 156.2250 156.2750 156.3250 156.3750 156.4250 156.4750 156.5250 156.5750 156.6250 156.6750 156.7250 156.8750 156.9250 156.9750 157.0250 157.0750 157.1250 157.1750 157.2250/161.8250 157.2750/161.8750 157.3250/161.9250 157.3750/161.9750 157.4250 Understanding Your Scanner...
  • Page 13 Fire/Police Frequency Range Group (MHz) 33.420–33.980 37.020–37.420 39.020–39.980 42.020–42.940 44.620–45.860 45.880 45.900 45.940–46.060 46.080–46.500 153.770–154.130 154.145–154.445 154.650–154.950 155.010–155.370 155.415–155.700 155.730–156.210 158.730–159.210 166.250 170.150 453.0375–453.9625 458.0375–458.9625 460.0125–460.6375 465.0125–465.6375 Step (kHz) — — — — 12.5 12.5 12.5 12.5 Understanding Your Scanner...

  • Page 14: Operation

    • If is adjusted so you always SQUELCH hear a hissing sound, the scanner does not scan or search properly. 5. To turn off the scanner when you finish, slide POWER STORING KNOWN FREQUENCIES INTO CHANNELS Good references for active frequencies are...

  • Page 15: Finding And Storing Active Frequencies

    Then you can store the frequencies you found into the scanner's channels or monitor memories. Note: You can use the scanner's delay feature while searching the service banks (see “Using the Delay Function” on Page 20).

  • Page 16: Using Direct Search

    7. To select a different band and search for another active frequency, begin again from Step 2. Using Direct Search During a direct search, the scanner searches up or down, starting from a frequency you specify. Follow these steps to use direct search.

  • Page 17: Using The Monitor Memory

    8 appear, and the press SCAN SCAN scanner begins to rapidly scan until it finds an active frequency. , the If the scanner finds an active frequency, it stops and displays that channel and Operation again.

  • Page 18: Scanning Options

    • To reverse the scanning direction at any 8 8 8 8 9 9 9 9 time, press • To set the scanner to remain on the current channel for 2 seconds after the transmission ends, see “Using the Delay Function” on Page 20.

  • Page 19: Listening To The Marine Bank

    You will probably receive one frequency better than the others for your area. The scanner should stop within a few seconds on that frequency. If the broadcast is weak, press again to resume scanning.

  • Page 20: Special Features

    You can program a 2 second delay in any of these ways: • If the scanner is scanning and stops on an active channel, quickly press before it continues scanning. • If the desired channel is not selected,...

  • Page 21: Reviewing Locked-Out Frequencies

    The scanner continues to monitor the weather channel. TURNING THE KEY TONE ON AND OFF The scanner is preset to sound a tone each BAND time you press one of its keys. You can turn the key tone on or off.

  • Page 22: Using A Computer To Program The Scanner

    There are also four television audio broadcast bands — the lower three transmit on the VHF band and the fourth transmits on the UHF band. You can use your scanner to monitor the 470–512 MHz portion of the UHF band.

  • Page 23: Guide To The Action Bands

    ˆ Guide to the Action Bands Typical Band Usage HF Band (3.00–30.00 MHz) 10 m Amateur High Range VHF Band (30.00–300.0 MHz) Low Range 6 m Amateur U.S. Government 2 m Amateur High Range UHF Band (300.00 MHz–3.0 GHz) U.S. Government 70 cm Amateur Low Range FM-TV Audio Broadcast, Wide Band...

  • Page 24: Band Allocation

    To help decide which frequency ranges to scan, use the following listing of the typical services that use the frequencies your scanner receives. These frequencies are subject to change, and might vary from area to area. For a more complete listing, refer to the Beyond Police Call , available at your local RadioShack store.
  • Page 25 — – VERY HIGH FREQUENCY (VHF) (30 MHz 300 MHz) VHF Low Band (29.7–50 MHz—in 5 kHz steps) 29.700–29.790 ... IND 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 ...
  • Page 26 157.470–157.515 ... 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 ...

  • Page 27: Avoiding Image Frequencies

    462.9375–463.1875 ... MED 463.200–467.925 ... BUS FM-TV Audio Broadcast, UHF Wide Band (470–512 MHz) (Channels 14 through 20 in 6 MHz steps) 475.750 ... Channel 14 481.750 ... Channel 15 487.750 ... Channel 16 493.750 ... Channel 17 499.750 ... Channel 18 505.750 ...

  • Page 28: Troubleshooting

    ˆ Troubleshooting If your scanner stops operating properly, these suggestions might help you eliminate the problem. If the scanner still does not operate properly, take it to your local RadioShack store for assistance. PROBLEM Scanner is on, but will not scan.

  • Page 29: Initializing The Scanner

    , otherwise the MON/CL memory might not clear. CARE Keep the scanner dry; if it gets wet, wipe it dry immediately. Use and store the scanner only in normal temperature environments. Handle the scanner carefully; do not drop it. Keep the scanner away from dust and dirt, and wipe it with a damp cloth occasionally to keep it looking new.

  • Page 30: Specifications

    ˆ Specifications Frequency Coverage: Ham ... 29–30 MHz (5.0 kHz Steps) VHF Lo ... 30–50 MHz (5.0 kHz Steps) Ham ... 50–54 MHz (5.0 kHz Steps) Air ... 108–136.9875 MHz (12.5 kHz Steps) Government ... 137–144 MHz (5 kHz Steps) Ham ...
  • Page 31 Audio Output Power (10% THD) ... 0.8 W Nominal Built-in Speaker ... 3 inch (77 mm), 8-Ohm, Dynamic Type Power Requirements ... 120 V AC, 60 Hz, 8W Current Drain ... 300 mA Operating Temperature ... 32°F to 110°F Dimensions (HWD) ... 2 Weight (without antenna and batteries) ...
  • Page 32 This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102 RadioShack Corporation Fort Worth, Texas 76102 12/99 20-423 GE-01D-5370 11A01 Printed in China...

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