Radio Shack PRO-2040 General Guide to Scanning, Guide to Frequencies, Guide to the Action Bands

Page 31

20-414.fm Page 31 Wednesday, August 4, 1999 11:12 AM

A GENERAL GUIDE TO SCANNING

Reception of the frequencies cov- ered by your scanner is mainly “line- of-sight.” That means you usually cannot hear stations that are beyond the horizon. During the summer months, you might be able to hear stations in the 30-50 MHz range lo- cated several hundred or even thou- sands of miles away. This is because of summer atmospheric conditions. This type of reception is unpredict- able but often very interesting!

GUIDE TO

FREQUENCIES

National Weather Frequen- cies

161.650 162.440

162.525

161.775 162.450

162.550

162.400 162.475

163.275

162.425 162.500

Ham Radio Frequencies

Ham operators often transmit emergency information when other communication methods break down. The following chart shows the frequencies that Hams use:

Wavelength	Frequency
(meters)	(MHz)

10-meter	28.000–29.700
6-meter	50.000–54.000
2-meter	144.000–148.000

Wavelength	Frequency
(meters)	(MHz)

70-cm	420.000–450.000

GUIDE TO THE ACTION BANDS

International Broadcast Bands

Several shortwave bands are allocat- ed for international broadcasting be- cause of the nature of propagation of high frequencies. The bands are sometimes identified according to the approximate wavelength of the signals in meters.

31

Image 31

Contents Fm Page 1 Wednesday, August 4, 1999 1112 AM Features Fm Page 3 Wednesday, August 4, 1999 1112 AM FCC Notice Contents Scanning Legally Preparation Connecting PowerUsing Standard AC Power Memory BackupUsing Vehicle Battery Power Telescoping Antenna Connecting AN AntennaOptional Outdoor Antenna Resetting the SCANNER’S Display Initializing Scanner Connecting AN EARPHONE/ HEADPHONES/ External SpeakerListening Safely Traffic SafetyLook AT the Front Panel Understanding Your ScannerTurns the data skip feature on and off Programs a 2-second delay for the selected chanStores frequencies into and accesses the 10 moni Enters the up or down direction in the search modeLook AT the Display Delay before scanning or when you listen to a channel Appears when you manually select a locked channel, orDuring a search hold when the frequency is stored Appears when you program a channel for a two-secondChannel-Storage Banks Understanding the SCANNER’S MemoryMonitor Memories Operation Turning on the SCANNER/SETTING the Volume and SquelchFinding Birdie Frequencies Manually Storing Frequencies in Channels Limit Search Searching for and Temporarily Storing Active FrequenciesDirect Search Search Skip Memory Listening to Monitor Memories Scanning the Stored Channels Moving a Frequency from a Monitor Memory to a ChannelTurning Channel-Storage Banks On and Off Manually Selecting a ChannelListening to the Weather Band Using the 2-SECOND Delay Special FeaturesDesignating a Priority Channel Changing Scanning and Search Speeds Locking OUT ChannelsPRO-2040 has two scan and three search speeds Type Speed Detecting Data Signals Guide to Frequencies General Guide to ScanningGuide to the Action Bands VHF Band 30.00-300.0 MHz Typical Band UsagePrimary Usage HF Band 3.00-30.0 MHzUHF Band Band AllocationAbbreviations Very High Frequency VHF- 30 MHz-300 MHz High Frequency HF- 3 MHz-30 MHzVHF-Hi Band 148-174 MHz Low Band 450-470 MHz Ultra High Frequency UHF- 300 MHz-3 GHzTrunked Systems Band Locally Assigned Frequency ConversionTroubleshooting Care and Maintenance Specifications Watts maximum DC 400 mA full volume unsquelchedMHz and 450 kHz OhmsFm Page 43 Wednesday, August 4, 1999 1112 AM Radio Shack