altmann
... means ST-optical input, 48 kHz sampling frequency means TOSLINK input, 44.1 kHz sampling frequency means XLR input, 96 kHz sampling frequency ...
... means ST-optical input, 48 kHz sampling frequency means TOSLINK input, 44.1 kHz sampling frequency means XLR input, 96 kHz sampling frequency ...
Feb 2000 ADSL Line Driver/Receiver Design Guide, Part 1
... The DMT signal placed on the line looks basically like white noise, because many different frequencies of rapidly changing amplitude and phase are combined simultaneously. The changes of each tone are considered random as they result from an arbitrary sequence of data bits comprising the transmitted ...
... The DMT signal placed on the line looks basically like white noise, because many different frequencies of rapidly changing amplitude and phase are combined simultaneously. The changes of each tone are considered random as they result from an arbitrary sequence of data bits comprising the transmitted ...
Amateur Extra Licensing Class
... A. The transmitted signal jumps from band to band at a predetermined rate B. Two or more information streams are merged into a "baseband", which then modulates the transmitter C. The transmitted signal is divided into packets of information D. Two or more information streams are merged into a digita ...
... A. The transmitted signal jumps from band to band at a predetermined rate B. Two or more information streams are merged into a "baseband", which then modulates the transmitter C. The transmitted signal is divided into packets of information D. Two or more information streams are merged into a digita ...
Crystal Radio Project
... received in the tuning coil and this may vary with the radio frequency tuned. The optimum spacing is not necessarily the closest spacing. As part of the process of tuning a station, you should adjust the space between the coils for maximum loudness heard in the earphone. In any case, the distance be ...
... received in the tuning coil and this may vary with the radio frequency tuned. The optimum spacing is not necessarily the closest spacing. As part of the process of tuning a station, you should adjust the space between the coils for maximum loudness heard in the earphone. In any case, the distance be ...
module1 A Communications Model
... the signal. Second, the signal must maintain a level sufficiently higher than noise to be received without error. Third, attenuation varies with frequency. The first and second problems are dealt with by attention to signal strength and the use of amplifiers or repeaters. The third problem is partic ...
... the signal. Second, the signal must maintain a level sufficiently higher than noise to be received without error. Third, attenuation varies with frequency. The first and second problems are dealt with by attention to signal strength and the use of amplifiers or repeaters. The third problem is partic ...
Angle Modulation by a Sinusoidal Signal
... angle-modulation scheme has far less amplitude variations The angle-modulation system has constant amplitude There should be no amplitude variations in the phasor-diagram representation of the system These slight variations are due to the first-order approximation that we have used for the expansion ...
... angle-modulation scheme has far less amplitude variations The angle-modulation system has constant amplitude There should be no amplitude variations in the phasor-diagram representation of the system These slight variations are due to the first-order approximation that we have used for the expansion ...
Radar Signal Processing
... transform (DFT). While it is not possible to anticipate all target motions prior to processing, and therefore the DFT must use a selected phasecompensation set. The more points used in the DFT the more likely the phase compensation will come close to matching the signal. ...
... transform (DFT). While it is not possible to anticipate all target motions prior to processing, and therefore the DFT must use a selected phasecompensation set. The more points used in the DFT the more likely the phase compensation will come close to matching the signal. ...
CIRCUIT DESCRIPTION - Vintage Radio Info
... These two signals, L+R and L-R, arc then combined with the 19 kc pilot signal shown in Figure 13C. This whole complex signal modulates the FM carrier and is then radiated from the broadcasting antenna. Figure 14 shows the locations of the different components that modulate an FM stereo signal. The “ ...
... These two signals, L+R and L-R, arc then combined with the 19 kc pilot signal shown in Figure 13C. This whole complex signal modulates the FM carrier and is then radiated from the broadcasting antenna. Figure 14 shows the locations of the different components that modulate an FM stereo signal. The “ ...
AN9789: Audio Quality Measurement Primer
... function, to account for the ear’s non-ideal perception of loudness at different frequencies, is one such example of the subjective quality of audio. In the early 1950s, transistors had just been invented. Audio amplifiers built with these devices offered better signal to noise, harmonic distortion, ...
... function, to account for the ear’s non-ideal perception of loudness at different frequencies, is one such example of the subjective quality of audio. In the early 1950s, transistors had just been invented. Audio amplifiers built with these devices offered better signal to noise, harmonic distortion, ...
Featuring the Agilent 54600B Digital Oscilloscope
... • Use shrouded test leads and alligator clips. • Leads: Connect to oscilloscope first; Connect/disconnect at source so loose lead is dead. • Connect probe to ground before connecting to high. Protect the Scope: • 400V maximum on input. • Use probes to reduce high voltages. • Be familiar with user’s ...
... • Use shrouded test leads and alligator clips. • Leads: Connect to oscilloscope first; Connect/disconnect at source so loose lead is dead. • Connect probe to ground before connecting to high. Protect the Scope: • 400V maximum on input. • Use probes to reduce high voltages. • Be familiar with user’s ...
Decibels
... However this brings us to another fascinating aspect of human hearing, in that, while an overall 3dB change in level is not all that dramatic to the casual listener, a 3dB change to part of the signal spectrum definitely is. For example a bass or treble control that cuts or boosts signals below 300H ...
... However this brings us to another fascinating aspect of human hearing, in that, while an overall 3dB change in level is not all that dramatic to the casual listener, a 3dB change to part of the signal spectrum definitely is. For example a bass or treble control that cuts or boosts signals below 300H ...
Chapter 5 PCM Modulator
... through a quantizer to quantize the sampling values. Then the signal will pass through an encoder to encode the quantization values and then convert to digital signal. In fact, the process of quantization can be achieved at one time by A/D converter. However, we should pay attention on the quantizat ...
... through a quantizer to quantize the sampling values. Then the signal will pass through an encoder to encode the quantization values and then convert to digital signal. In fact, the process of quantization can be achieved at one time by A/D converter. However, we should pay attention on the quantizat ...
Design of a Quadrature Clock Conditioning Circuit in 90
... Index Terms—Clocks, CMOS Integrated Circuits, Duty-Cycle Control, Feedback Circuits, Phase Control. ...
... Index Terms—Clocks, CMOS Integrated Circuits, Duty-Cycle Control, Feedback Circuits, Phase Control. ...
Comparison of Transverter vs. Tranceiver Performance (K2DH)
... What are the advantages of a transceiver? First, Convenience. Nothing could be simpler than taking a radio out of the box, connecting it to a mike, antenna, and power source and Getting On The Air. Second, Compactness. You have a single box, possibly capable of operating on more than one VHF/UHF/SHF ...
... What are the advantages of a transceiver? First, Convenience. Nothing could be simpler than taking a radio out of the box, connecting it to a mike, antenna, and power source and Getting On The Air. Second, Compactness. You have a single box, possibly capable of operating on more than one VHF/UHF/SHF ...
High-frequency direction finding
High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is the common name for a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can efficiently communicate over long distances; for example, between U-boats and their land-based headquarters. HF/DF was primarily used to catch enemy radios while they transmitted, although it was also used to locate friendly aircraft as a navigation aid. The basic technique remains in use to this day as one of the fundamental disciplines of signals intelligence, although typically incorporated into a larger suite of radio systems and radars instead of being a stand-alone system.Huff-duff used a set of antennas to receive the same signal in slightly different locations or angles, and then used the slight differences in the signal to display the bearing to the transmitter on an oscilloscope display. Earlier systems used a mechanically rotated antenna (or solenoid) and an operator listening for peaks or nulls in the signal, which took considerable time to determine. Huff-duff's speed allowed it to catch fleeting signals, such as those from the U-boat fleet.The system was initially developed by Robert Watson-Watt starting in 1926, although many of the practical elements were not developed until the late 1930s. Huff-duff units were in very high demand, and there was considerable inter-service rivalry involved in their distribution. An early use was by the RAF Fighter Command as part of the Dowding system of interception control, while ground-based units were also widely used to collect information for the Admiralty to locate U-boats. Between 1942 and 1944, smaller units became widely available and were common fixtures on Royal Navy ships. It is estimated huff-duff contributed to 24% of all U-boats sunk during the war.The basic concept is also known by several alternate names, including Cathode-Ray Direction Finding (CRDF), Twin Path DF, and for its inventor, Watson-Watt DF or Adcock/Watson-Watt when the antenna is considered.