Frequency

In: Computers and Technology

Submitted By halfpint85
Words 264
Pages 2
Checkpoint in your own words IT/241 Intro to W-Lan technologies FRED HOLMES IV April Sturgess Friday May 4, 2013

What is frequency? Frequency is the number of cycles of a repeating signal. The unit of frequency is measured in hertz. Each hertz is equal to one cycle of an event in seconds.
For a frequency to be considered an audio frequency it has to be between 15 Hz and 20000 Hz. A radio frequency will range from 20 kHz to 1 terahertz.

A medium for radio frequency will be air and metal. Air will not conduct electricity so the displacement won’t happen. When it comes to infinity value, air will become resistant and only some current flow will go through. Metal is an electricity conductor. This means that the flow will be based on the resistance of metals and the components with in the metal.

What is analogue modulation? Is the information which is applied to the carrier signal. This is usually with radio signals. The amplitude modulation will change any frequency of the signal.

Frequency Modulation is the frequency of the Carrier can wave at the input signal with the level use multiple methods
When comparing the modulation we can show that both use the same method. The only difference is that digit.

While this process is going on the digital modulation can use multiple times. Digital will also apply filters to interfering data. The disadvantage is it will give communication

References
http://wiki.answers.com/Q/Write_two_separate_analogies_one_to_describe_each_of_the_following_principles_of_radio_wave_transmission_Frequency_What_if_your_analogy_must_explain_voltage_current_and_resistance_Analog_vs_digita…...

Similar Documents

Radio Frequency

...Radio Frequency Identification system Riordan Manufacturing Radio Frequency Identification (RFID) is a widely used wireless device to scan products. It is a non contact wireless device, which uses radio frequency electromagnetic fields that transfer data from a unique tag placed on products for purchase. Tags will be placed upon every item which will include raw materials, plastic beverages, cooling fans, stents, bottles, and storage containers. This device is non contact unlike the bar code technology, RFID removes the need to have straight line contact like the bar code requires. TH RFID can scan from distances as far as 100 feet. The hardware consists of an antenna and a transceiver. Both of these hardware’s read and delivers the information to a processing device. This streamlines the tracking process throughout the ordering and shipping process. Sales department fills the order and enters the data into the billing and shipping system. At this point the order goes on to the customer shipping department where it is processed for shipment and then loaded on to the delivery truck. All of the items shipped on a daily basis are updated by time and date, and truck number the order has been shipped on. Several benefits come from an RFID system. The enhancement of the supply chain visibility will deliver more efficiency, speed, and allows for tracking products throughout the shipment process. In addition, reducing costs due to efficient waste management. The RFID has many......

Words: 286 - Pages: 2

Frequency Response

...Abstract There is a growing importance for the studies of frequency stability and control of power system with increasing levels of wind power penetration, especially in United States with a goal of 20% or more by 2030. The increasing penetration of wind in to existing synchronous based generation capacity requires the modifications in the procedures of grid frequency control as wind turbine units fail to provide inertial support and primary control reserves during the initial and later stages of frequency events respectively. Therefore, it is necessary for the wind turbines to emulate the response of current synchronous based generation capacity so as to make the power system reliable. This type of response can be introduced by control schemes developed. This report provides a literature review of the frequency control basics and controller schemes used. And also it provides an overview of the basic concepts related to the effects of wind generation on frequency behavior of the power system network. Introduction Frequency stability and control very much dependent on active power balancing is a major research topic concerned with grid integration of large wind farms. The instability of frequency occurs when power system fails to maintain it within particular limits under normal conditions. Active power imbalance indicates the variations in frequency and consequently the constancy of frequency represents the quality of power supply. Such an imbalance can be......

Words: 3432 - Pages: 14

Frequency Distribution

...Frequency Distributions & Sampling 1. Is the lager sampling changing anything? 2. Is your mean increasing or decreasing? 3. Do you think your current data is enough to paint a picture? The increasing of collected data quite fortunately allowed the majority of the data to remain the same. It increased the total drive time 392 total minutes of drive time. However, mean and mode still remained the same with an average of 24.5 minutes (mean) and a reoccurring number of number 22 (mode) which repeats a total of 4 times. Based on the consistency of my data I do believe I have enough information to create an accurate assessment of the collected data. Day | Amount of time it takes to drive to work daily | 1 | 27 minutes | 2 | 29 minutes | 3 | 21 minutes | 4 | 24 minutes | 5 | 22 minutes | 6 | 25 minutes | 7 | 28 minutes | 8 | 22 minutes | 9 | 26 minutes | 10 | 23 minutes | 11 | 22 minutes | | Five additional days of data | 12 | 25 minutes | 13 | 23 minutes | 14 | 22 minutes | 15 | 26 Minutes | 16 | 27 Minutes | | | | | x | f | xf | (x-xbar)^2 | (x-xbar)^2*f | 1 | 27 | 27 | 55.443 | 1496.9587 | 2 | 29 | 58 | 41.551 | 1204.9766 | 3 | 21 | 63 | 29.659 | 622.8372 | 4 | 24 | 96 | 19.767 | 474.4060 | 5 | 22 | 110 | 11.875 | 261.2482 | 6 | 25 | 150 | 5.983 | 149.5729 | 7 | 28 | 196 | 2.091 | 58.5456 | 8 | 22 | 176 | 0.199 | 4.3762 | 9 | 26 | 234 | 0.307 | 7.9798 | 10 | 23 | 230 | 2.415 | 55.5431 | 11 |......

Words: 322 - Pages: 2

High Frequency Trading

...High-Frequency Trading Remi Charpin MBA student BADM 580 June 28, 2010 Prepared for Professor Charles Alvis Financial Markets Seminar Table of Contents List of Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Executive Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Problem Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Background Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Discussion of Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Strategies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Key Players . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Pros. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Words: 5503 - Pages: 23

Filtering and Frequency

...understanding of the Fourier transform and the frequency domain, and how they apply to image enhancement. Background Introduction to the Fourier Transform and the Frequency Domain DFT Smoothing Frequency-Domain Filters Sharpening Frequency-Domain Filters 4.1 Background • Any function that periodically repeats itself can be expressed as the sum of sines and/or cosines of different frequencies, each multiplied by a different coefficient (Fourier series). • Even functions that are not periodic (but whose area under the curve is finite) can be expressed as the integral of sines and/or cosines multiplied by a weighting function (Fourier transform). • The advent of digital computation and the “discovery” of fast Fourier Transform (FFT) algorithm in the late 1950s revolutionized the field of signal processing, and allowed for the first time practical processing and meaningful interpretation of a host of signals of exceptional human and industrial importance. • The frequency domain refers to the plane of the two dimensional discrete Fourier transform of an image. • The purpose of the Fourier transform is to represent a signal as a linear combination of sinusoidal signals of various frequencies. = Any function that periodically repeats itself can be expressed as a sum of sines and cosines of different frequencies each multiplied by a different coefficient – a Fourier series 4.2 Introduction to the Fourier Transform and the Frequency Domain • The one-dimensional......

Words: 3417 - Pages: 14

Analouge Radio Frequency

...Introduction: A network which freely passes desired band of frequencies while almost suppress other band of frequencies is called filter. This type of network was first examined by G.A Campbell and O.J Zobel of bell telephone laboratories. Filters are networks that process signals in a frequency-dependent manner. The basic concept of a filter can be explained by examining the frequency dependent nature of the impedance of capacitors and inductors. In filters, attenuation changes suddenly as the frequency is varied. Thus, filters have ability to discriminate between signals which differ in frequency. Filters are widely employed in signal processing and communication systems in applications such as channel equalization, noise reduction, radar, audio processing, video processing, biomedical signal processing, and analysis of economic and financial data. For example in a radio receiver band-pass filters, or tuners, are used to extract the signals from a radio channel. In an audio graphic equalizer the input signal is filtered into a number of sub-band signals and the gain for each sub-band can be varied manually with a set of controls to change the perceived audio sensation. In a Dolby system pre-filtering and post filtering are used to minimize the effect of noise. In hi-fi audio a compensating filter may be included in the preamplifier to compensate for the non-ideal frequency-response characteristics of the speakers. Filters are also used to create perceptual audio-visual......

Words: 2561 - Pages: 11

The Frequency Concept of Probability

...Probability & Mathematical Statistics | “The frequency concept of Probability” | [Type the author name] | What is probability & Mathematical Statistics? It is the mathematical machinery necessary to answer questions about uncertain events. Where scientists, engineers and so forth need to make results and findings to these uncertain events precise... Random experiment “A random experiment is an experiment, trial, or observation that can be repeated numerous times under the same conditions... It must in no way be affected by any previous outcome and cannot be predicted with certainty.” i.e. it is uncertain (we don’t know ahead of time what the answer will be) and repeatable (ideally).The sample space is the set containing all possible outcomes from a random experiment. Often called S. (In set theory this is usually called U, but it’s the same thing) Discrete probability Finite Probability This is where there are only finitely many possible outcomes. Moreover, many of these outcomes will mostly be where all the outcomes are equally likely, that is, uniform finite probability. An example of such a thing is where a fair cubical die is tossed. It will come up with one of the six outcomes 1, 2, 3, 4, 5, or 6, and each with the same probability. Another example is where a fair coin is flipped. It will come up with one of the two outcomes H or T. Terminology and notation. We’ll call the tossing of a die a trial or an experiment. Where we...

Words: 1183 - Pages: 5

Radio Frequency Identifications Tags

...Radio Frequency Identifications Tags II. RFID tags have many advantages. A. RFID tags enhance product visibility which facilitates operations. They are made rugged and robust; therefore; they can be used in harsh environments and temperatures. There no positioning problems with RFID tags, they can be place anywhere and do not require a line-of sight to be scanned. B RFID tags reduce cost. The RFID system reduces the labor cost of the company by providing a good tracking system. This technology can be effective in stock management. It helps to reduce the misplacement of goods because it’s easier to trace. C. RFID tags reduce losses and theft. The use of RFID tags in retail stores are used to keep track of high priced items, to prevent theft. RFID tags easily track moving objects and send the required information back to the reader. III. RFID tags are used in a variety of ways. A. RFID tags have a longer read range and can be scanned on the factory floor from forklifts and scanners at a distance. This technology is used in the manufactory industry. There are no positioning problems with an RFID tag, they can be placed anywhere. B Injectable RFID tags can be used for tracking animals easily. These tags have information about the animal’s, medical history and vaccinations. Information written on the tags cannot be duplicated easily. C. RFID tags are being used to reduce truancy and improve safety in schools. Each child......

Words: 452 - Pages: 2

Low Frequency Amplifier

...1N4001 5 4 R4 1 RL Vi C1 1 F -Vs UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 13 QW-R107-004,D TDA2030 TYPICAL CHARACTERISTICS Fig.2 Open loop frequency response 140 LINEAR INTEGRATED CIRCUIT Fig.3 Output power vs. Supply voltage Phase 180 24 Gv=26dB d=0.5% f=40 to 15kHz RL=4 Phase 100 90 20 PoUT (W) Gv(dB) 60 0 16 RL=8 12 Gain 20 -20 8 -60 4 1 10 2 10 3 10 4 10 5 10 6 10 7 10 24 28 32 36 40 44 Frequency (Hz) Vs (V) Fig.4 Total harmonic distortion vs. output power 2 10 2 10 Fig.5 Two tone CCIF intermodulation distortion 1 10 Gv=26dB d( % ) 1 10 d( % ) 0 10 Vs=38V RL=8 f=15kHz Vs=32V RL=4 f=1kHz 0 10 Vs=32V PoUT=4W RL=4 Gv=26dB Order (2f1-f2) Order (2f2-f1) -1 10 -1 10 -2 10 -2 10 -1 10 0 10 1 10 2 10 -2 10 1 10 2 10 3 10 4 10 5 10 Po (W) Frequency (Hz) Fig.6 Large signal frequency response 30 30 Fig.7 Maximum allowable power dissipation vs. ambient temperture Vs=+-15V RL=8 25 25 Vo(Vp-p) 20 PD (W) Vs=+-15V RL=4 20 ink ats he te ini inf ving ha ink C/W ° ats he h=25 Rt 15 15 10 10 he at Rt sink h= h 4° av C/ ing he ats W ink Rt ha h= vi 8° C/ ng W 5 1 10 2 10 3 10 4 10 5 -50 0 50 100 150 200 Frequency (kHz) Ta (°C) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 13 QW-R107-004,D TDA2030 +Vs C3 0.22 F C5 220 F /40V LINEAR INTEGRATED......

Words: 3557 - Pages: 15

Radio Frequency Identification (Rfid)

...Running head: RADIO FREQUENCY IDENTIFICATION Radio Frequency Identification (RFID) Esther Olayinka Olagbaju November 27, 2011 Chamberlain College of Nursing Introduction Radio frequency identification (RFID) is a generic term that is used to describe a system that transmits the identity (in the form of a unique serial number) of an object or person wirelessly, using radio waves. It is in use all around us; from the chips inserted in pets as an ID tags, to the EZPass through a tollbooth. In short, this technology does not require contact or line of sight for communication. RFID data can be read through the human body, clothing, and non-metallic materials (AIM, 2011). As a member of the committee created by the Government to investigate the potential of implanting an electronic record (EHR) into every U.S. citizen, this research will look into the benefits of this business decision to the Government, and then we will analyze the advantages and disadvantages of RFID being implanted under the human skin, which is then followed up by the laws governing this action if it can be enforced or voluntary based procedure, and finally the percentage of people that will be willing to go through this procedure. Body of Analysis Radio frequency identification technology is slick and easy to manage and also comes in three general varieties, namely; passive, active, and semi-passive (also known as battery-assisted). Passive tags need no internal power source and are only active......

Words: 849 - Pages: 4

Frequency of Tardiness and Academic Performance

...Frequency of Tardiness and Academic Performance On Grade Nine Students In Partial Fulfillment of the Requirements In Science, Math and English IV Submitted by: Dagala, Aaron Christian C. Elizaga, Maria Isabel A. Ibag, Bernadine E. Roslinda, Karl Angelo J. Soriano, Czashka Rheyshyl Submitted to: Mr. Rogelio D. Rasay III MAT-MATH Ms. Hasmin M. Macatabang MA-Ed Mr. Arcel Joseph C. Amoguis CHAPTER 1 INTRODUCTION “Tardiness often robs us opportunity, and the dispatch of our forces.” -Niccolo Machiavelli A significant number of school-age children have television sets in their bedrooms, and a great many probably are watching a late movie or one of the late-night talk shows when they should be sleeping. When and if they have an alarm clock, they just continue to sleep after it goes off. This was according to Murray Light who was asked to make an article regarding the growing concern of tardiness. Enamiroro Oghuvbu conducted a study in Nigeria to determine the causes of absenteeism and tardiness. He cites that the distance to school, school discipline, family background and school location are some of the common causes of for the tardiness of secondary students. Tardiness is a growing problem according to both of them. One’s tardiness, most especially a student’s, might result to low academic performance for he or she has missed a part of a discussion, making him or her unable to grasp the concept of the lesson. Stacy Zeiger, an eHow......

Words: 6462 - Pages: 26

Frequency and Uses

...Frequency and Uses David Pearlmutter IT/235 June-Sunday,2015 Frank Futyma Frequency and Uses Photography whether that being out sourced or in house is an important aspect in advertising for any type of business. These options will contain both pros and cons when you are going to discuss the financial and beneficial aspects for the company effectively reaching the target audience. The convenience of doing in house photography and that of the scheduling of the out sourced professional photographers will prove interesting and vital in details. Also the idea of the many uses of this imagery and accessibility can be a factor in the merchandising, advertising and the business fortitude. The convenience associated with that of having complete access to the utilization of developing an in house photography staff that is far superior to that of any other option. The fact is that the company can offer any schedule constraint to the imagery team and allow that task to be completed within the time sensitive request. Employees are more likely to understand the needs of the company when given the task of providing merchandising imagery. The company also has access to these images because the photographs are the sole property of the company. Alternatively, out sourced photography also has many beneficial aspects in regards to advertising, this is especially true when discussing the professionalism associated with the character, products, and services provided by a person or a......

Words: 724 - Pages: 3

Fundamental Frequency of a Beam

...Dynamic Systems and Controls Laboratory Experiment 2: Fundamental Frequency of a Beam Due: October 9th, 2015 Submitted: October 9th, 2015 Table of Contents Abstract | 2 | List of Symbols and Units | 3 | Theory | 4 | Procedure and Experimental Setup | 8 | Sample Calculation | 9 | Error Analysis | 12 | Results | 13 | Discussion and Conclusion | 16 | References | 18 | Appendix | 19 | Abstract The experimental analysis of rotating equipment and the fundamental frequency of an attached beam was achieved by attaching a motor to a simply supported beam with adjustable weights. The input from the motor provided a method of creating a frequency that could be correlated experimentally to the theoretical Dunkerley’s formula and Rayleigh’s energy method. Using the accumulated data, the experimental values obtained were Ke = 5285.4 lb/ft, me = .09773 slugs, and ωn = 232.56 rad/s; comparatively, the theoretical values were Ke = 5493.16 lb/ft, me = .06967 slugs, and ωn = 278.7 rad/s. The resultant margin of error for these values were 3.78%, 40.28%, and 16.56%, respectively. List of Symbols and Units Symbols | Description | Units | ωns | Natural Frequency of System | radsec | ω1n | Natural Frequency of Beam Alone | radsec | ω2n | Natural Frequency of Motor and Added Mass | radsec | mb | Mass of Beam | slugs | me | Effective Mass of Beam | slugs | ke | Effective Stiffness of Beam | lbfft | M | Mass of Motor and Added Mass |......

Words: 2070 - Pages: 9

High Frequency Trading

...D Disrupting Wall Street High Frequency Trading Case I, Group A6 13.10.2015 Case I: High Frequency Trading Group A6 1 1. Describe the current market structure and trends of US equities trading. The current US equity trading market structure can be evaluated from different perspectives. In light of the actual case study the focus of this brief analysis lies on the way how trades were respectively are actually pursued. Originally - until the late 1970s / early 1980s – trading took place on a physical trading floor. Brokers among floor traders and runners once populated the physical exchanges (Siddaiah, 2009). Nowadays the physical trading floors are not relevant anymore and solely exist as part of an historical brand identity (Ivey, 2014). However, even those traders still present at a physical trading floor, e.g. at the New York Stock Exchange (NYSE), rely on electronic support: quote filled computer screens provide information while electronic handhelds are used to eventually execute trades. Since the 1980s electronic trading constantly gained importance. Today virtually 100% of all trades are done electronically or at least with a remarkable amount of computer support. Special servers not only match ‘buy’ and ‘sell’ orders within fractions of a second but are also capable of confirming thousands of individual orders per second. Based on execution speed and power one can rank different electronic trading systems as follows1: (1) Direct......

Words: 2558 - Pages: 11

Frequency Response

...Introduction This lab deals with the concept of frequency response. During steady state, sinusoidal inputs to a linear system will generate sinusoidal responses of the same frequency, but of different amplitude and phase angles. This is due to a time lag between input and output generated. These differences are functions of frequency. In this experiment, the frequency response test is used to identify the (linear) dynamics of a plant. It is performed by inputting a sinusoidal signal and comparing it with the sinusoidal output. Objective of Experiment 1. To perform a frequency response test on an aircraft electro-hydraulic servo-actuator, hence determining the phase and gain margins of the servo-actuator. 2. To verify that increasing the gain by the gain margin causes instability. Equipment and Apparatus 1. Electro-hydraulic servo-actuator 2. Amplifier unit 3. Oscilloscope (CRO) 4. Function generator (FG) 5. Hydraulic power supply (outside laboratory) Background of Experiment This experiment utilizes a servo mechanism which is an automatic device that takes advantage of error-sensing feedback to correct and amplify the signal. The servo system comprises of a servo-actuator and an amplifier unit. In aircrafts, a similar system is used to convert electrical autopilot voltage outputs into a proportional mechanical movement. The mechanical movement is linked to the control rods, which controls the equipment the pilot uses to move the......

Words: 3296 - Pages: 14

Bubuki Buranki | the englishman who went up a hill x264 | Sheckley, Robert - Paraiso II [18263] (r1.1 rafcastro).epub