E6B02 What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier? E8A12 What is an advantage of using digital signals instead of analog signals to convey the same information? E2B08 Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television? Send your full call sign once or twice B. E7D10 What is the primary reason that a high-frequency switching type high voltage power supply can be both less expensive and lighter in weight than a conventional power supply? E9E10 Which of these choices is an effective way to match an antenna with a 100 ohm feed point impedance to a 50 ohm coaxial cable feed line? I never cared all that much about it. The difference in dB between the noise floor and the level of an incoming signal which will cause 1 dB of gain compression E4D02 A Which of the following describes two problems caused by poor dynamic range in a communications receiver? E2A13 What type of satellite appears to stay in one position in the sky? Capture effect E4C04 D What is the definition of the noise figure of a receiver? The conversion of light to electrical energy E6F05 A Which of the following describes an optical shaft encoder? E4D11 Why are third-order intermodulation products created within a receiver of particular interest compared to other products? E5D17 How many watts are consumed in a circuit having a power factor of 0. I'm working on a more detailed analysis, looking at things like dB decoding differences between versions. Is it going to be put into the next update? Digital signals can be regenerated multiple times without error E8A14 A Which of these methods is commonly used to convert analog signals to digital signals? From south to north E2A02 A What is the direction of a descending pass for an amateur satellite? A sawtooth wave E8A03 A What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics? The frequency range over which the circuit can lock E7H14 C What is a phase-locked loop circuit? All transmissions starts after the red lines with a nearly exact timing. E3B02 What is the approximate maximum range for signals using transequatorial propagation? E9B15 What is the front-to-back ratio of the radiation pattern shown in Figure E9-2? A properly terminated circulator at the output of the transmitter E4D05 A What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146. This is also a strength of this mode as it makes the use of high power unnecessary.
A square wave is displayed and the probe is adjusted until the horizontal portions of the displayed wave are as nearly flat as possible E4B14 B What happens if a dip meter is too tightly coupled to a tuned circuit being checked? All of these choices are correct E3C02 C What is the cause of Aurora activity? E9A18 What term describes station output, taking into account all gains and losses? He's subsequently modified the antenna supports to make them easier to use and provide more ground clearance. It provides different modes adapted to different modes of propagation and bands. E9H02 Which is generally true for low band 160 meter and 80 meter receiving antennas? E7F13 What is the function of taps in a digital signal processing filter? The point of minimum height of a satellite's orbit C. Elevation E9C08 C What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2? There are many factors affecting the Earth-Moon-Earth path and some of them are unpredictable. E7D13 What is the equation for calculating power dissipation by a series connected linear voltage regulator? E4A04 What determines the upper frequency limit for a computer soundcard-based oscilloscope program? By transmitting extra data that may be used to detect and correct transmission errors D.
In fractions of transmission line electrical wavelength E9H Effective radiated power; system gains and losses; radio direction finding antennas E9H01 D What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2-dB feed line loss, 2. E9E03 What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point? E9E08 Which of the following measurements is characteristic of a mismatched transmission line? In its hinted decoding mode, it absolutely is attempting to piece together missing data from a database of known callsigns. A wave consisting of an electric field and a magnetic field oscillating at right angles to each other E8D08 D Which of the following best describes electromagnetic waves traveling in free space? E3A15 What is an electromagnetic wave? E6D08 What is one reason for using powdered-iron cores rather than ferrite cores in an inductor? Beryllium Oxide E0A10 A What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic? E9G02 What type of coordinate system is used in a Smith chart? E5D06 In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow? E6A06 What is the beta of a bipolar junction transistor? E2A07 Which of the following types of signals can be relayed through a linear transponder? E1C06 Which of the following statements concerning remotely controlled amateur stations is true? The first illustration is a table of Moon rise and set times and the corresponding azimuth of the Moon for each. E0A04 When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations? See on Wikipedia Latitude and Longitude are virtual lines running at 90° to each other around the Earth. Acceptor impurity E6A05 C What is the alpha of a bipolar junction transistor? Counting the number of input pulses occurring within a specific period of time E7F09 A What is the purpose of a frequency counter? A spectrum analyzer E4A06 D Which of the following could be determined with a spectrum analyzer? Interference to other amateurs is unavoidable and therefore acceptable C. E5B03 What happens to the phase angle of a reactance when it is converted to a susceptance? Once you can receive signals try calling one of the louder ones. E2D01 Which of the following digital modes is especially designed for use for meteor scatter signals? Measured in degrees Kelvin it can vary from 170 or so to as much as 3000+ degrees.
If you don't want to take this risk you had better leave this page right now. Nonlinear circuits or devices E4D09 C What is the purpose of the preselector in a communications receiver? E9D06 What happens to the bandwidth of an antenna as it is shortened through the use of loading coils? But it's taking a long time because I like to ride my mountain bike and play my guitar and go surf fishing and the existing system works remarkably well. My current station is 2 homebrew 9 ele Yagis on a pressure treated 2X4 lumber pyramid base 10 ft tall and sits in my backyard. In operation, the mode is quite impressive really, catching a lot that would otherwise be missed, but with the caveat that there will be periodic false decodes. Very high impedance E9F16 D Which of the following is a significant difference between foam-dielectric coaxial cable and solid-dielectric cable , assuming all other parameters are the same? Reassigning impedance values with regard to the prime center E9G09 A What third family of circles is often added to a Smith chart during the process of solving problems? E2A02 What is the direction of a descending pass for an amateur satellite? E2C13 What indicator is required to be used by U.
Ground reflections and scattering make the field impedance vary with location C. Latitude lines are 69 miles to each degree and longitude lines are 69 miles to each degree as well. Emitter load E7B14 A In Figure E7-2, what is the purpose of C2? E4D08 What causes intermodulation in an electronic circuit? E3B07 Which of the following could account for hearing an echo on the received signal of a distant station? E9C14 How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground? E3C12 How does the maximum distance of ground-wave propagation change when the signal frequency is increased? The antenna requires a large physical area and 4 separate supports E9C06 B What is the effect of a terminating resistor on a rhombic antenna? E6D15 What is current in the primary winding of a transformer called if no load is attached to the secondary? E4C02 Which of the following portions of a receiver can be effective in eliminating image signal interference? Method of Moments E9B10 A What is the principle of a Method of Moments analysis? Keep up the good work. E6B01 What is the most useful characteristic of a Zener diode? The most common way to do it is through Internet by using a Time Synchronization program, such as or , and configuring them to synchronize the time every 5 minutes or so. E6B07 What is the failure mechanism when a junction diode fails due to excessive current? All of these choices are correct E3B Propagation and technique: trans-equatorial, long path, gray-line; multi-path propagation E3B01 A What is transequatorial propagation? E6A02 Which of the following semiconductor materials contains excess free electrons? E9F04 What is the typical velocity factor for a coaxial cable with solid polyethylene dielectric? E6F07 What is a solid state relay? E9B08 How can the approximate beam-width in a given plane of a directional antenna be determined? The presence of a meteor at any given time is not readily predictable, so alternating timeslots are often used to given enough time for a meteor trail to appear while also making sure stations are not all transmitting in the same timeslot. Time base accuracy E4B02 C What is an advantage of using a bridge circuit to measure impedance? E4B11 How should an antenna analyzer be connected when measuring antenna resonance and feed point impedance? Very high E7G15 A What is the typical output impedance of an integrated circuit op-amp? Vestigial sideband provides high frequency emphasis to sharpen the picture What is vestigial sideband modulation? E9C06 What is the effect of a terminating resistor on a rhombic antenna? I'm not sure what you're getting at. Data was collected for 10 minutes i.
E7B12 What type of amplifier circuit is shown in Figure E7-1? A reactance modulator on the oscillator E7E02 D What is the function of a reactance modulator? E9C10 Which of the following describes a Zepp antenna? E4E07 How can you determine if line noise interference is being generated within your home? Very low E7H Oscillators and signal sources: types of oscillators; synthesizers and phase-locked loops; direct digital synthesizers E7H01 D What are three oscillator circuits used in Amateur Radio equipment? E7C05 Which filter type is described as having ripple in the passband and a sharp cutoff? It decreases E3C13 A What type of polarization is best for ground-wave propagation? The satellite's orientation with respect to the Earth D. The gamma match E9E03 D What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point? Holes E6A04 C What is the name given to an impurity atom that adds holes to a semiconductor crystal structure? E1D11 Which amateur stations are eligible to operate as Earth stations? E7A03 Which of the following can divide the frequency of a pulse train by 2? E4E05 How can noise from an electric motor be suppressed? E4A05 What might be an advantage of a digital vs an analog oscilloscope? E5C07 What is a vector? E1F01 On what frequencies are spread spectrum transmissions permitted? E9F03 Why is the physical length of a coaxial cable transmission line shorter than its electrical length? E7C11 Which of the following is the common name for a filter network which is equivalent to two L-networks connected back-to-back with the two inductors in series and the capacitors in shunt at the input and output? E5C06 What does the impedance 50-j25 represent? E9A15 What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2. Gray-line E3B09 A At what time of day is gray-line propagation most likely to occur? Pre-built installation packages will be made available after further testing is completed. E3C02 What is indicated by a rising A or K index? A display using a crystalline liquid which, in conjunction with polarizing filters, becomes opaque when voltage is applied E6D06 D What core material property determines the inductance of a toroidal inductor? E7G12 What is an integrated circuit operational amplifier? E1D06 Which of the following is a requirement of a space station? By scanning each field from bottom to top C. E5A01 What can cause the voltage across reactances in series to be larger than the voltage applied to them? The software uses the computer clock for keeping the time synchronized with an accuracy of seconds.
E3C14 Why does the radio-path horizon distance exceed the geometric horizon? E2A09 What do the terms L band and S band specify with regard to satellite communications? By multiplying the apparent power times the power factor E5D11 C What is the power factor of an R-L circuit having a 60 degree phase angle between the voltage and the current? Point 3 E5C21 A Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and a 19 picofarad capacitor at 21. E9G06 On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate? E9E09 Which of these matching systems is an effective method of connecting a 50 ohm coaxial cable feed line to a grounded tower so it can be used as a vertical antenna? E5C11 What do the two numbers that are used to define a point on a graph using rectangular coordinates represent? The computed feed point impedance may be incorrect E9B12 D What is the far-field of an antenna? E7D02 What is one characteristic of a switching electronic voltage regulator? It filters the supply voltage E7D10 A What is the purpose of C3 in the circuit shown in Figure E7-3? E9G11 How are the wavelength scales on a Smith chart calibrated? E3B06 Which of the following amateur bands most frequently provides long-path propagation? A type of amplifier that uses switching technology to achieve high efficiency E7B03 A Which of the following forms the output of a class D amplifier circuit? E4D05 What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146. Restrict both gain and Q E7G06 D Which of the following is the most appropriate use of an op-amp active filter? Is it legal to return the call using upper sideband on the same frequency? Point 4 E5C20 B Which point in Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and an 18 microhenry inductor at 3. The increased conductivity of an illuminated semiconductor E6F02 A What happens to the conductivity of a photoconductive material when light shines on it? E5A15 Which of the following can increase Q for inductors and capacitors? E9A04 Which of the following factors may affect the feed point impedance of an antenna? Spread-spectrum E8C10 A What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels? Intermodulation interference E4D07 D Which of the following describes the most significant effect of an off-frequency signal when it is causing cross-modulation interference to a desired signal? E6F05 Which describes an optical shaft encoder? E7H05 How is positive feedback supplied in a Pierce oscillator? Do not spam your product, website, blog, YouTube channel or other personal project. E7C02 Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor? E5D13 How much power is consumed in a circuit consisting of a 100 ohm resistor in series with a 100 ohm inductive reactance drawing 1 ampere? E6A17 What are the names of the three terminals of a field-effect transistor? It produces one output pulse for every ten input pulses E7F04 C What additional circuitry must be added to a 100-kHz crystal-controlled marker generator so as to provide markers at 50 and 25 kHz? E9E05 How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system? E9G07 On the Smith chart shown in Figure E9-3, what is the only straight line shown? E3C03 Which of the following signal paths is most likely to experience high levels of absorption when the A index or K index is elevated? E7D12 What is the drop-out voltage of an analog voltage regulator? Now I am thinking doing eme. E8A01 What is the name of the process that shows that a square wave is made up of a sine wave plus all of its odd harmonics? E3A12 What is the cause of auroral activity? E1F10 What is the maximum permitted transmitter peak envelope power for an amateur station transmitting spread spectrum communications? Measure base-to-emitter voltage with a voltmeter; it should be approximately 0.
Permeability E6D07 B What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used? Signals not using the spectrum-spreading algorithm are suppressed in the receiver B. A Chebyshev filter E7C06 C What are the distinguishing features of an elliptical filter? The satellite's uplink and downlink frequency bands C. E6B03 What special type of diode is capable of both amplification and oscillation? E1C07 What is meant by local control? Paul located his amplifiers at the antennas to minimize losses in feedlines. Because the satellite is spinning E2A11 B What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation? E6A05 What is the alpha of a bipolar junction transistor? Tropospheric ducting E3C10 B How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground? E7B16 What is the effect of intermodulation products in a linear power amplifier? E1C10 What types of amateur stations may automatically retransmit the radio signals of other amateur stations? By adding the mean anomaly to the orbital inclination D. E9B05 What type of antenna pattern over real ground is shown in Figure E9-2? E7F01 What is meant by direct digital conversion as applied to software defined radios? E7D07 What is the purpose of C2 in the circuit shown in Figure E7-3? Excessive junction temperature E6B08 A Which of the following describes a type of semiconductor diode? E0A05 What is one of the potential hazards of using microwaves in the amateur radio bands? It has a bidirectional pattern E9H06 C What is the triangulation method of direction finding? It comes like that by default.