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tech_study [2015/11/06 15:40]
cwh0009 [Test Format]
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-Amateur radio is a fun and exciting hobby, but there are many rules and principles that you must be aware of before you can legally and safely operate a radio. We hope to provide a free textbook to help you pass the amateur radio test. If you have any suggestions,​ feedback, or criticism on our study guide, please feel free to contact us. You can message us on [[https://​www.facebook.com/​k4ryarc|Facebook]] or [[https://​twitter.com/​K4RYARC|Twitter]]. This is the first version of our study material and we are still in the process of writing it, so it may be rough. This text is maintained by volunteers in their free time. 
  
-====== The Technician License ====== 
- 
-The Technician license is an entry-level amateur radio license. Successfully completing the test will give you full transmission privileges on frequencies above 30 MHz. 
- 
-The Technician license will also give you limited privileges to experiment with high frequency radios. You will receive voice privileges between 28.3 and 28.5 MHz and full data privileges between 28.0 MHz and 28.3 MHz on the 10 meter band. You may also transmit Morse code on the 80, 40, and 15 meter bands. Technician licenses will limit you to 200 Watts of peak envelope power (PEP). 
- 
-==== Section Summary ==== 
-    * The Technician License will allow you to transmit on amateur radio frequencies of 30 MHz and above. 
-    * You must pass a multiple choice test in order to get your Technician license. 
- 
-===== Test Format ===== 
- 
-The Technician test (also known as Element 2) is composed of 35 questions. ​ You must achieve a minimum score of 26 correctly answered questions to pass. All questions are multiple choice with four options. Only one choice is correct, although "all of the above" is an option on some questions. The test is not timed. 
- 
-The FCC requires that all of the questions on the exam be drawn from a publicly maintained question pool. The examination may not ask any questions that are not in the public question pool. The FCC requires that the question pool be at least 10 times the size of the number of questions on the test, but they are typically a little larger. The question pools are typically valid for four years, although minor spelling corrections are made without reissuing the question pool. Questions are are proven to be incorrect or are rendered incorrect due to changes in rules or regulations are withdrawn from the question pool. The current Technician question pool can be found online, along with all the right and wrong answers on the [[http://​www.ncvec.org/​page.php?​id=338|NCVEC'​s website]]. ​ Once again, **by law, absolutely no variation from these questions is permitted on the test**. If you can memorize every question and answer, you can pass the test with a perfect score. However, we recommend that you study and learn the material. 
- 
-==== Section Summary ==== 
- 
-    * You must get 26 out of 35 questions correct to pass the Technician licensing exam. 
-    * All tests follow a standard format and the question pool and answers are publicly available. 
- 
-===== Studying for the Test ===== 
- 
-If you want to study on your own, are many study guides available online, including this one. Another popular one is KB6NU'​s No Nonsense study guides. The General and Extra Class guides are $7.99, but the Technician guide may be downloaded for free on [[http://​www.kb6nu.com/​study-guides/​|his website]]. The Amateur Radio Relay League (ARRL) publishes a set of their own study guides. These are normally around $20 in the [[http://​www.arrl.org/​shop/​|ARRL store]]. You may also be able to find a copy in your public library. These books are fairly exhaustive and will serve as a good reference even after you complete your exam. If the $20 price is too much, you can find study guides written by other authors for less online. 
- 
-You can take practice exams online. [[https://​www.qrz.com/​hamtest/​|QRZ]] provides free practice tests. It requires registration on their site, but this is free and does not require an amateur license. Another good resource is [[https://​hamstudy.org/​|HamStudy.org]]. HamStudy has the advantage of displaying the questions on flashcard. Flipping the flashcard over will give you an explanation of the answer, which may help you retain the information better and also provide you with important background information on amateur radio. You should continue taking practice tests until you can reliably pass tests without missing any questions. 
- 
-Your local amateur radio club may have study sessions and classes available. You can find a club near you on the [[http://​www.arrl.org/​find-a-club|ARRL'​s website]], although they only show ARRL affiliated clubs. 
- 
----- 
- 
-**Section Summary** 
- 
-    * Buy or download a study guide. 
-    * Take practice tests online. 
- 
----- 
- 
-===== Taking the Test ===== 
- 
-Show up early to the test so you have time find the place the test is being given out. Tests may be scheduled to start at a set time, and if you're late, you'll be asked to come back later. This format is more common at large licensing events or hamfests. In other situations, there may just be a set amount of time that tests are being offered, and if you show up any time during this time, you will be given a test. This is more common for situations where a club is administering the test. 
- 
-Typically a testing session costs $15, although some clubs may pay the fee for you or offer free testing. This fee is usually sent to the organization providing training for the test givers, and is used to cover the expenses of producing the test. The test givers are allowed to take out a small portion of the $15 to cover transportation fees or test expenses such as pencils. The FCC does not charge a fee for licensing or testing and does not collect any portion of these fee. 
- 
-You will also need to bring a government issued photo ID such as a driver'​s license, non-driver'​s photo ID, passport, or military ID. If you do not have one, you may bring two forms of another ID listed on this [[http://​www.arrl.org/​what-to-bring-to-an-exam-session|page on the ARRL's website]]. You will need to know your Social Security Number (SSN) to apply for a license. If you don't know it, bring your card. This information is required by the FCC to issue you a license. If you do not wish to use your SSN, you may [[http://​wireless.fcc.gov/​uls/​index.htm?​job=about_getting_started|apply for an FCC Federal Registration Number (FRN)]] ahead of time. 
- 
-You should also bring a pencil and a calculator to the test. A four function calculator should be adequate for the Technician test, but later tests may require a scientific calculator. Technically you may bring any calculator to the test as long as the memory is cleared, but it is better to bring a scientific calculator. You may not store any formulas or notes in your calculator, you may not use a calculator with external communication capabilities,​ and you may not use your phone as a calculator. 
- 
-If you fail the test, you may be permitted to retake another test. However, your test giver is not required to do this. If you pass the test, you may be given an opportunity to take another test, such as the General or Extra for free, subject to test availability. There are some people who have passed both the Technician and General test, or even all three tests, in a single sitting. This requires a lot of preparation. 
- 
----- 
- 
-**Section Summary** 
- 
-    * Bring $15, a photo ID, a calculator, and a pencil with an erase to the test. 
-    * Memorize your Social Security Number. 
-    * Arrive early. 
- 
----- 
- 
-====== Radio Basics ====== 
-This chapter will guide you through the basic theory and concepts of radio operation. This includes an introduction to electromagnetic waves, modulation, and the basic components and operation of a radio. At the conclusion of this chapter, you should understand the following concepts: 
-  * The behavior of electromagnetic waves 
-  * The significance of frequency, amplitude, wavelength, and phase 
-  * Where radio waves fit into the electromagnetic spectrum 
-  * What frequencies different radio services operate at 
-  * The different modulation schemes used for voice and data transmissions 
-  * The parts of a radio station 
-Actual test questions along with conceptual questions will be provided at the conclusion of each section so that you can test your knowledge. Study material that directly answers a question on the examination will be indicated in **bold**. Key words will be indicated in //​italics//​. 
-===== Waves ===== 
-The two main types of waves that exist in the universe are //​mechanical waves// and //​electromagnetic waves//. //​Mechanical waves// are produced by the deformation of a physical medium. For example, an acoustic or sound wave, travels through the air and is carried by tiny vibrations created in the by a speaker or a person speaking. Seismic waves generated by an earthquake travel through and along the surface of the Earth. The speed of a mechanical wave depends on type of wave and the medium it is traveling through. The speed of sound in seawater is about five times faster than the speed of sound in air. 
- 
-//​Electromagnetic waves// are created by the changes in the energy of particles. This energy change **generates electrical and magnetic fields**. **All electromagnetic waves travel at the speed of light. The speed of light is 300,000,000 meters per second** or 670 million miles per hour. Examples of electromagnetic waves include visible light, x-rays, and **radio waves**. 
- 
-Electromagnetic waves and mechanical waves are not interchangeable. When you speak, you generate a mechanical wave. This wave can be picked up by a microphone and converted into an electromagnetic wave. This electrical signal can travel along wires and then be converted back into a mechanical wave that you can hear using a speaker. Electronics can do many things with this electrical signal. For example, an electric megaphone can amplify the electrical signal and play it back much louder. You can record the electrical signal and store it computer to play later. A radio can radiate the signal out so another radio can pick it up. 
- 
-==== Section Summary ==== 
-    * Radio waves are electromagnetic waves. 
- 
-==== Test Questions ==== 
-[T3B03] What are the two components of a radio wave? 
-  * A. AC and DC 
-  * B. Voltage and current 
-  * C. Electric and magnetic fields 
-  * D. Ionizing and non-ionizing radiation 
- 
-[T3B04] How fast does a radio wave travel through free space? 
-  * A. At the speed of light 
-  * B. At the speed of sound 
-  * C. Its speed is inversely proportional to its wavelength 
-  * D. Its speed increases as the frequency increases 
- 
-[T3B11] What is the approximate velocity of a radio wave as it travels through free space? 
-  * A. 3000 kilometers per second 
-  * B. 300,000,000 meters per second 
-  * C. 300,000 miles per hour 
-  * D. 186,000 miles per hour 
-===== Wave Properties ===== 
-==== Frequency ==== 
-Frequency is the amount of time an event occurs in a specific length of time. In the context of electromagnetic waves, the frequency is the number of cycles of an electromagnetic wave that pass in a second. A cycle is the amount of electromagnetic wave needed to repeat wave. It includes one wave peak and one wave trough. We measure this using the unit Hertz. This is abbreviated as Hz and is equivalent to 1/s or s<​sup>​-1</​sup>​. Historically,​ the unit of cycles per second (cps) was used in place of Hz  up through the 1970s. 
- 
-Figure 1. One Hz Wave, showing peak, trough, and cycles measured peak-to-peak and trough-to-trough. 
- 
-Figure 2. Two Hz Wave showing that in the same amount of time, a 2 Hz wave repeats itself twice as often as the 1 hz wave. 
- 
-==== Wavelength ==== 
-The wavelength is the actual distance traveled by a wave in a single cycle. The wavelength is inversely related to the frequency. As the wavelength increases, the frequency decreases, and as the wavelength decreases, the frequency increases. Since all electromagnetic waves travel at the speed of light, multiplying the frequency (the number of cycles completed in a second) by the speed of light will give you the distance ​ 
- 
- 
-==== Amplitude ==== 
- 
-==== Phase ==== 
- 
-==== Section Summary ==== 
-    * Frequency is the type taken for an electromagnetic wave to complete once cycle and is measured in Hertz. 
-    * Wavelength is the distance an electromagnetic wave travels in once cycle and is measured in meters. 
-    * Amplitude is a measure of the intensity of an electromagnetic wave. 
-    * Frequency and wavelength are inversely proportional. 
-    * Phase represents a time shift in an electromagnetic wave and is measured in degrees. 
- 
-==== Test Questions ==== 
-[T3B01] What is the name for the distance a radio wave travels during one complete cycle? 
-  * A. Wave speed 
-  * B. Waveform 
-  * C. Wavelength 
-  * D. Wave spread 
- 
-[T3B05] How does the wavelength of a radio wave relate to its frequency? 
-  * A. The wavelength gets longer as the frequency increases 
-  * B. The wavelength gets shorter as the frequency increases 
-  * C. There is no relationship between wavelength and frequency 
-  * D. The wavelength depends on the bandwidth of the signal 
-===== The Electromagnetic Spectrum ===== 
- 
- 
-==== Section Summary ==== 
- 
-==== Test Questions ==== 
-[T3B07] What property of radio waves is often used to identify the different frequency bands? 
-  * A. The approximate wavelength 
-  * B. The magnetic intensity of waves 
-  * C. The time it takes for waves to travel one mile 
-  * D. The voltage standing wave ratio of waves 
- 
-[T3B08] What are the frequency limits of the VHF spectrum? 
-  * A. 30 to 300 kHz 
-  * B. 30 to 300 MHz 
-  * C. 300 to 3000 kHz 
-  * D. 300 to 3000 MHz 
- 
-[T3B09] What are the frequency limits of the UHF spectrum? 
-  * A. 30 to 300 kHz 
-  * B. 30 to 300 MHz 
-  * C. 300 to 3000 kHz 
-  * D. 300 to 3000 MHz 
- 
-[T3B10] What frequency range is referred to as HF? 
-  * A. 300 to 3000 MHz 
-  * B. 30 to 300 MHz 
-  * C. 3 to 30 MHz 
-  * D. 300 to 3000 kHz 
-===== Modulation ===== 
-Modulation is the process of modifying an electromagnetic wave so that it carries another signal, such as voice or data. The original signal is referred to as the //​carrier//​. Many methods of modulation are used in amateur radio. 
-==== Morse Code (CW) ==== 
-==== Amplitude Modulation (AM) ==== 
-==== Single Side Band (SSB) ==== 
-==== Frequency Modulation (FM) ==== 
-==== Section Summary ==== 
-==== Test Questions ==== 
-[T8A01] Which of the following is a form of amplitude modulation? 
-  * A. Spread-spectrum 
-  * B. Packet radio 
-  * C. Single sideband 
-  * D. Phase shift keying 
- 
-[T8A05] Which of the following types of emission has the narrowest bandwidth? 
-  * A. FM voice 
-  * B. SSB voice 
-  * C. CW 
-  * D. Slow-scan TV 
- 
-[T8D09] What code is used when sending CW in the amateur bands? 
-  * A. Baudot 
-  * B. Hamming 
-  * C. International Morse 
-  * D. Gray 
- 
-[T1B09] Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band? 
-  * A. To allow for calibration error in the transmitter frequency display 
-  * B. So that modulation sidebands do not extend beyond the band edge 
-  * C. To allow for transmitter frequency drift 
-  * D. All of these choices are correct 
- 
-[T2B13] Which of the following is true of the use of SSB phone in amateur bands above 50 MHz? 
-  * A. It is permitted only by holders of a General Class or higher license 
-  * B. It is permitted only on repeaters 
-  * C. It is permitted in at least some portion of all the amateur bands above 50 MHz 
-  * D. It is permitted only on when power is limited to no more than 100 watts 
- 
-[T8A11] What is the approximate maximum bandwidth required to transmit a CW signal? 
-  * A. 2.4 kHz 
-  * B. 150 Hz 
-  * C. 1000 Hz 
-  * D. 15 kHz 
- 
-[T2B05] What determines the amount of deviation of an FM (as opposed to PM) signal? 
-  * A. Both the frequency and amplitude of the modulating signal 
-  * B. The frequency of the modulating signal 
-  * C. The amplitude of the modulating signal 
-  * D. The relative phase of the modulating signal and the carrier 
- 
-[T8A07] What is the primary advantage of single sideband over FM for voice transmissions?​ 
-  * A. SSB signals are easier to tune 
-  * B. SSB signals are less susceptible to interference 
-  * C. SSB signals have narrower bandwidth 
-  * D. All of these choices are correct 
- 
-[T2B06] What happens when the deviation of an FM transmitter is increased? 
-  * A. Its signal occupies more bandwidth 
-  * B. Its output power increases 
-  * C. Its output power and bandwidth increases 
-  * D. Asymmetric modulation occurs 
- 
-[T8A10] What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band? 
-  * A. More than 10 MHz 
-  * B. About 6 MHz 
-  * C. About 3 MHz 
-  * D. About 1 MHz 
-===== Transmitting and Receiving ===== 
-A radio transmitter will mix the electrical signal with a radio wave (the //carrier wave//) through a process called //​modulation//​. The electrical signal can generated by a microphone or by a computer. This signal is radiated out into the world through an antenna. A radio receiver can receive this signal, remove the carrier wave through //​demodulation//,​ and send the original electrical signal to a speaker to play as audio or send it to a computer as data. 
- 
-===== Radio Stations ===== 
-==== The Radio ==== 
-==== The Antenna ==== 
-==== Power Supplies ==== 
tech_study.1446846009.txt.gz · Last modified: 2015/11/06 15:40 by cwh0009