.net barcode reader component download Copyright 2001 - the McGraw-Hill Companies in Software

Print DataMatrix in Software Copyright 2001 - the McGraw-Hill Companies

Copyright 2001 - the McGraw-Hill Companies
Read DataMatrix In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Making Data Matrix 2d Barcode In None
Using Barcode generator for Software Control to generate, create ECC200 image in Software applications.
300 Small loop receiving antennas
ECC200 Recognizer In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Generating Data Matrix In C#
Using Barcode drawer for .NET framework Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
15-1A Large loop antenna
DataMatrix Creator In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create DataMatrix image in ASP.NET applications.
DataMatrix Maker In .NET Framework
Using Barcode generator for Visual Studio .NET Control to generate, create Data Matrix image in .NET framework applications.
the station appears to drop dramatically at the center of the notch Turn the antenna only a few degrees one way or the other, however, and the signal strength increases sharply The depth of the null can reach 10 to 15 dB on sloppy loops and 30 to 40 dB on well-built loops (30 dB is a very common value) I have seen claims of 60-dB nulls for some commercially available loop antennas The construction and uniformity of the loop are primary factors in the sharpness and depth of the null
Data Matrix ECC200 Drawer In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create ECC200 image in .NET framework applications.
Print Barcode In None
Using Barcode generation for Software Control to generate, create barcode image in Software applications.
Small loop receiving antennas 301
DataMatrix Drawer In None
Using Barcode maker for Software Control to generate, create Data Matrix image in Software applications.
Create GS1-128 In None
Using Barcode creation for Software Control to generate, create GS1-128 image in Software applications.
15-1B Loopstick antenna
Code 3 Of 9 Generator In None
Using Barcode drawer for Software Control to generate, create Code 3/9 image in Software applications.
Barcode Drawer In None
Using Barcode creator for Software Control to generate, create bar code image in Software applications.
At one time, the principal use of the small loop antenna was radio direction-finding, especially in the lower-frequency bands The RDF loop is mounted with a compass rose to allow the operator to find the direction of minimum response The null was used, rather than the peak response point, because it is far narrower than the peak As a result, precise determination of direction is possible Because the null is bidirectional, ambiguity exists as to which of the two directions is the correct
Creating ISSN - 13 In None
Using Barcode generator for Software Control to generate, create ISSN image in Software applications.
Barcode Encoder In None
Using Barcode printer for Font Control to generate, create barcode image in Font applications.
302 Small loop receiving antennas direction What the direction-finder finds is a line along which the station exists If the line is found from two reasonably separated locations and the lines of direction are plotted on a map, then the two lines will cross in the area of the station Three or more lines of direction (a process called triangulation) yields a pretty precise knowledge of the station s actual location Today, these small loops are still used for radio direction-finding, but their use has been extended into the general receiving arena, especially on the low frequencies One of the characteristics of these bands is the possibility of strong local interference smothering weaker ground-wave and sky-wave stations As a result, you cannot hear cochannel signals when one of them is very strong and the other is weak Similarly, if a cochannel station has a signal strength that is an appreciable fraction of the desired signal and is slightly different in frequency, then the two signals will heterodyne together and form a whistling sound in the receiver output The frequency of the whistle is an audio tone equal to the difference in frequency between the two signals This is often the case when trying to hear foreign BCB signals on frequencies (called split frequencies) between the standard spacing The directional characteristics of the loop can help if the loop null is placed in the direction of the undesired signal Loops are used mainly in the low-frequency bands even though such loops are either physically larger than high-frequency loops or require more turns of wire Loops have been used as high as VHF and are commonly used in the 10-m ham band for such activities as hidden transmitter hunts The reason why low frequencies are the general preserve of loops is that these frequencies are more likely to have substantial ground-wave signals Sky-wave signals lose some of their apparent directivity because of multiple reflections Similarly, VHF and UHF waves are likely to reflect from buildings and hillsides and so will arrive at angles other than the direction of the transmitter As a result, the loop is less useful for the purpose of radio directionfinding If your goal is not RDF but listening to the station, this is hardly a problem A small loop can be used in the upper shortwave bands to null a strong local groundwave station in order to hear a weaker sky-wave station Finally, loops can be useful in rejecting noise from local sources, such as a leaky electric power line or a neighbor s outdoor light dimmer Let s examine the basic theory of small loop antennas and then take a look at some practical construction methods
Code 128C Reader In .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Creating Bar Code In VB.NET
Using Barcode printer for .NET framework Control to generate, create barcode image in .NET applications.
Barcode Generation In .NET
Using Barcode creation for Reporting Service Control to generate, create barcode image in Reporting Service applications.
Scan Code 128B In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
USS-128 Recognizer In C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
Print EAN-13 In Objective-C
Using Barcode maker for iPhone Control to generate, create EAN13 image in iPhone applications.
Copyright © OnBarcode.com . All rights reserved.