An equivalent resistance is the resistance of a single resistor that
... Law 2. The sum of the emfs around any closed current loop is equal to the sum of all the IR drops around that loop. (Ohm’s Law: V = IR) ...
... Law 2. The sum of the emfs around any closed current loop is equal to the sum of all the IR drops around that loop. (Ohm’s Law: V = IR) ...
A 1920s Style Colpitts Broadcast Receiver
... connected to the set through an external 10 pF coupling capacitor, and no ground connection, the tuning range is 530–1010 kHz with the full inductance of L1 switched in, and 1007–1743 kHz with the tap on L1 switched in. Actual frequency coverage varies depending on antenna length and coupling capaci ...
... connected to the set through an external 10 pF coupling capacitor, and no ground connection, the tuning range is 530–1010 kHz with the full inductance of L1 switched in, and 1007–1743 kHz with the tap on L1 switched in. Actual frequency coverage varies depending on antenna length and coupling capaci ...
2. What are the two major types of control system?
... component of the system and shows the flow of signals. The basic elements of block diagram are blocks, branch point and summing point. 11. What is the basis for framing the rules of block diagram reduction technique? The rules for block diagram reduction technique are framed such that any modificati ...
... component of the system and shows the flow of signals. The basic elements of block diagram are blocks, branch point and summing point. 11. What is the basis for framing the rules of block diagram reduction technique? The rules for block diagram reduction technique are framed such that any modificati ...
radio communications: am and fm
... amplitude, which is what is relevant in the case of AM, does not matter here. It is the corruption of the zero-crossings that matters in FM. Now, the detected signal in noiseless FM will be proportional to fc+kfm(t). If the constant is removed, we get a signal proportional to kfm(t), which is what w ...
... amplitude, which is what is relevant in the case of AM, does not matter here. It is the corruption of the zero-crossings that matters in FM. Now, the detected signal in noiseless FM will be proportional to fc+kfm(t). If the constant is removed, we get a signal proportional to kfm(t), which is what w ...
ch2-stallings
... Bandwidth - the bandwidth of the transmitted signal as constrained by the transmitter and the nature of the transmission medium (Hertz) ...
... Bandwidth - the bandwidth of the transmitted signal as constrained by the transmitter and the nature of the transmission medium (Hertz) ...
Purchase order - scintilla Academy
... 23. The phenomenon of polarization shows that light has ............ nature a) transverse b) longitudinal c) dual d) particle 24. A capacitor of capacitance 10 μ F is charged to 10 V. The energy stored in it is a) 500 μ J b) 1000 μ J c) 1 μ J d) 100 μ J 25. Direction of current induced in a wire mov ...
... 23. The phenomenon of polarization shows that light has ............ nature a) transverse b) longitudinal c) dual d) particle 24. A capacitor of capacitance 10 μ F is charged to 10 V. The energy stored in it is a) 500 μ J b) 1000 μ J c) 1 μ J d) 100 μ J 25. Direction of current induced in a wire mov ...
09 September - otvarc home
... and fold the sides next to the mast section. The result is a folded antenna wrapped with its own wire into a secure bundle. ...
... and fold the sides next to the mast section. The result is a folded antenna wrapped with its own wire into a secure bundle. ...
Wireless Sensor Networks
... Co-channel interference: another sender uses the same spectrum Adjacent-channel interference: another sender uses some other part of the radio spectrum, but receiver filters are not good enough to fully ...
... Co-channel interference: another sender uses the same spectrum Adjacent-channel interference: another sender uses some other part of the radio spectrum, but receiver filters are not good enough to fully ...
RF Transmission Lines and Antennas
... 1. Regardless of their lengths, all transmission lines have resistance, inductance and capacitance. These can be combined and are called impedance. Resistance is simply the DC resistance of wire. Inductance is resistance to an AC voltage. Capacitance is resistance to AC current. These definitions ar ...
... 1. Regardless of their lengths, all transmission lines have resistance, inductance and capacitance. These can be combined and are called impedance. Resistance is simply the DC resistance of wire. Inductance is resistance to an AC voltage. Capacitance is resistance to AC current. These definitions ar ...
ISSUE: RF Connector Types Explained
... Some AIS units use the same PL259/SO239 connectors, but the majority use BNC connectors to differentiate them from VHF radios. BNC stands for “Bayonet Neill-Concelman” where Neill and Concelman were the two inventors of the connector and the “Bayonet” refers to the fact that you only have to turn th ...
... Some AIS units use the same PL259/SO239 connectors, but the majority use BNC connectors to differentiate them from VHF radios. BNC stands for “Bayonet Neill-Concelman” where Neill and Concelman were the two inventors of the connector and the “Bayonet” refers to the fact that you only have to turn th ...
LOW-ANGLE BEAM RIDING OVER THE OCEAN
... incoherent reflection, the interference pattern can be considered to result from the superposition of two Fraunhofer diffraction patterns where the phase angle cp alone determines the positions of the maxima and minima. As the missile moves through the interference pattern, the angle cp changes cont ...
... incoherent reflection, the interference pattern can be considered to result from the superposition of two Fraunhofer diffraction patterns where the phase angle cp alone determines the positions of the maxima and minima. As the missile moves through the interference pattern, the angle cp changes cont ...
Wireless Communications and Networks
... Phase () - measure of the relative position in time within a single period of a signal Wavelength () - distance occupied by a single cycle of the signal ...
... Phase () - measure of the relative position in time within a single period of a signal Wavelength () - distance occupied by a single cycle of the signal ...
D.C. Circuits_2 - GTU e
... Electrical circuits often contain one or more resistors grouped together and attached to an energy source, such as a battery. The following symbols are often used: Ground ...
... Electrical circuits often contain one or more resistors grouped together and attached to an energy source, such as a battery. The following symbols are often used: Ground ...
30.4: Channels of Communications
... The bandwidth of a microwave link is of the order of GHz. This large bandwidth means that the microwave beam has a large capacity for transmitting information. Microwaves are generally used for point-to-point communication where signals are transmitted directly from transmitter to receiver (space wa ...
... The bandwidth of a microwave link is of the order of GHz. This large bandwidth means that the microwave beam has a large capacity for transmitting information. Microwaves are generally used for point-to-point communication where signals are transmitted directly from transmitter to receiver (space wa ...
Review PSTN
... 25. What is the function of a signaling system? ________________________________________________________________________ 26. What is the most commonly used signaling system in North America. _________. 27. Differentiate between a simplex, half duplex and full duplex transmission system. Give one ex ...
... 25. What is the function of a signaling system? ________________________________________________________________________ 26. What is the most commonly used signaling system in North America. _________. 27. Differentiate between a simplex, half duplex and full duplex transmission system. Give one ex ...
Michael Faraday, one of the great British physicists, in 1831
... (c) Describe three ways in which the size of the induced current could be increased. ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________ ...
... (c) Describe three ways in which the size of the induced current could be increased. ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________ ...
AM Receiver - Profe Saul
... BC109C transistors in my prototype.The tuned circuit is designed for medium wave. I used a ferrite rod and tuning capacitor from an old radio which tuned from approximately 550 - 1600kHz. Q1 and Q2 form a compund transistor pair featuring high gain and very high input impedance. This is necessary so ...
... BC109C transistors in my prototype.The tuned circuit is designed for medium wave. I used a ferrite rod and tuning capacitor from an old radio which tuned from approximately 550 - 1600kHz. Q1 and Q2 form a compund transistor pair featuring high gain and very high input impedance. This is necessary so ...
Smart transmitters
... faults; and can be communicated with from a remote location. • The sensor signal transmitter into a unified standard signal: 0/4-20mADC, 1-5VDC, 0-10VDc • Many different types of transmitters. • In addition to the functions are sensing there is amplification shaping function, the output control sign ...
... faults; and can be communicated with from a remote location. • The sensor signal transmitter into a unified standard signal: 0/4-20mADC, 1-5VDC, 0-10VDc • Many different types of transmitters. • In addition to the functions are sensing there is amplification shaping function, the output control sign ...
Document
... Since the voltage across this resistor Vv >> Vg = 1.50 mV, we can expect that the resistor Rv has (almost) all the voltage across it. So at full-scale deflection Iv = 50 A and Vv = 1000 V Rv = Vv/Iv = 1000 V/50 A = 20 M. To get all the precision we would have to use Vv - Vg in the numerator but ...
... Since the voltage across this resistor Vv >> Vg = 1.50 mV, we can expect that the resistor Rv has (almost) all the voltage across it. So at full-scale deflection Iv = 50 A and Vv = 1000 V Rv = Vv/Iv = 1000 V/50 A = 20 M. To get all the precision we would have to use Vv - Vg in the numerator but ...
Integrating Interference-Free, Easily Accessed Radio in Home Audio
... Integrating Interference-Free, Easily Accessed Radio in Home Audio When choosing an FM/AM tuner, remember that the quality of its outputted audio is only as good as the signal delivered via the antenna.The voltage transmitted down the antenna, through the connections and to your amplifier needs to b ...
... Integrating Interference-Free, Easily Accessed Radio in Home Audio When choosing an FM/AM tuner, remember that the quality of its outputted audio is only as good as the signal delivered via the antenna.The voltage transmitted down the antenna, through the connections and to your amplifier needs to b ...
Data and Computer Communications
... because propagation velocity of a signal through a guided medium varies with frequency various frequency components arrive at different times resulting in phase shifts between the frequencies particularly critical for digital data since parts of one bit spill over into others causing intersymbol ...
... because propagation velocity of a signal through a guided medium varies with frequency various frequency components arrive at different times resulting in phase shifts between the frequencies particularly critical for digital data since parts of one bit spill over into others causing intersymbol ...
Direction finding
Direction finding (DF), or radio direction finding (RDF), is the measurement of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication, including radar signals detection and monitoring (ELINT/ESM). By combining the direction information from two or more suitably spaced receivers (or a single mobile receiver), the source of a transmission may be located via triangulation. Radio direction finding is used in the navigation of ships and aircraft, to locate emergency transmitters for search and rescue, for tracking wildlife, and to locate illegal or interfering transmitters. RDF was important in combating German threats during both the WW-II Battle of Britain and the long running Battle of the Atlantic. In the former, the Air Ministry also used RDF to locate its own fighter groups and vector them to detected Germain raids.RDF systems can be used with any radio source, although very long wavelengths (low frequencies) require very large antennas, and are generally used only on ground-based systems. These wavelengths are nevertheless used for marine radio navigation as they can travel very long distances ""over the horizon"", which is valuable for ships when the line-of-sight may be only a few tens of kilometres. For aerial use, where the horizon may extend to hundreds of kilometres, higher frequencies can be used, allowing the use of much smaller antennas. An automatic direction finder, which could be tuned to radio beacons called non-directional beacons or commercial AM radio broadcasters, was until recently, a feature of most aircraft, but is now being phased out For the military, RDF is a key tool of signals intelligence. The ability to locate the position of an enemy transmitter has been invaluable since World War I, and played a key role in World War II's Battle of the Atlantic. It is estimated that the UK's advanced ""huff-duff"" systems were directly or indirectly responsible for 24% of all U-Boats sunk during the war. Modern systems often used phased array antennas to allow rapid beamforming for highly accurate results, and are part of a larger electronic warfare suite.Radio direction finders have evolved, following the development of new electronics. Early systems used mechanically rotated antennas that compared signal strengths, and several electronic versions of the same concept followed. Modern systems use the comparison of phase or doppler techniques which are generally simpler to automate. Early British radar sets were referred to as RDF, which is often stated was a deception. In fact, the Chain Home systems used large RDF receivers to determine directions. Later radar systems generally used a single antenna for broadcast and reception, and determined direction from the direction the antenna was facing.