Page 1 Transceiver Controls
... VFO > The keypad or VFO knob can be used to enter the operating frequency on a modern transceiver Microphone Gain > If a transmitter is operated with the microphone gain set too high the output signal might become distorted Squelch > The squelch control is used to mute receiver output noise when no ...
... VFO > The keypad or VFO knob can be used to enter the operating frequency on a modern transceiver Microphone Gain > If a transmitter is operated with the microphone gain set too high the output signal might become distorted Squelch > The squelch control is used to mute receiver output noise when no ...
AM_receiver
... The attenuation of the channel, i.e. air, is high for low frequency voice signals, but the attenuation is significantly lower for higher frequencies. If the voice signal is transmitted as is, i.e. baseband transmission, only one channel can be broadcast at a time. Often it is needed to have many ...
... The attenuation of the channel, i.e. air, is high for low frequency voice signals, but the attenuation is significantly lower for higher frequencies. If the voice signal is transmitted as is, i.e. baseband transmission, only one channel can be broadcast at a time. Often it is needed to have many ...
Principles of Electronic Communication Systems
... 1. Spectrum space is conserved and allows more signals to be transmitted in the same frequency range. 2. All power is channeled into a single sideband. This produces a stronger signal that will carry farther and will be more reliably received at greater distances. 3. Occupied bandwidth space is narr ...
... 1. Spectrum space is conserved and allows more signals to be transmitted in the same frequency range. 2. All power is channeled into a single sideband. This produces a stronger signal that will carry farther and will be more reliably received at greater distances. 3. Occupied bandwidth space is narr ...
AM transmitters and receivers
... human voice can make sounds above this range, but for voice radio communications we do not need to use those higher voice frequencies. All of the intelligence (information) we need is contained in the voice frequencies below 3000 Hz. Because this is such an important topic, we are going to go over t ...
... human voice can make sounds above this range, but for voice radio communications we do not need to use those higher voice frequencies. All of the intelligence (information) we need is contained in the voice frequencies below 3000 Hz. Because this is such an important topic, we are going to go over t ...
ELE2
... • The incoming signals are mixed with the local oscillator signal and one of the resulting frequencies is the Intermediate frequency which is filtered and amplified by the if amplifier ...
... • The incoming signals are mixed with the local oscillator signal and one of the resulting frequencies is the Intermediate frequency which is filtered and amplified by the if amplifier ...
Computer Networks and Internets
... Answer: (1) Speed = 2 * 200K * log24 = 800K bits/sec (2) Speed = B * dB / 3.01 = 200K * 28 / 3.01 = 1.86 M bits/sec (3) The ideal channel is slower because it is not using enough different states. If it used more states, it would run faster. ...
... Answer: (1) Speed = 2 * 200K * log24 = 800K bits/sec (2) Speed = B * dB / 3.01 = 200K * 28 / 3.01 = 1.86 M bits/sec (3) The ideal channel is slower because it is not using enough different states. If it used more states, it would run faster. ...
hf/ssb 5/10 kw transmitters
... and interfaces for adapting the IP protocols used in infrastructural systems to the HF band. The company has recently developed a suite of software applications supporting the transfer of file messages and e-mail using the data link protocol set out in NATO STANAG 5066, for use in products for the d ...
... and interfaces for adapting the IP protocols used in infrastructural systems to the HF band. The company has recently developed a suite of software applications supporting the transfer of file messages and e-mail using the data link protocol set out in NATO STANAG 5066, for use in products for the d ...
QRSS Communicating at .8 WPM
... Sending “599 IL AA6DY K” would take about 7 minutes. The other side of the Q would take another 7 minutes or so, making the entire QSO about 14 minutes long. So, we don’t really do too much of this. ...
... Sending “599 IL AA6DY K” would take about 7 minutes. The other side of the Q would take another 7 minutes or so, making the entire QSO about 14 minutes long. So, we don’t really do too much of this. ...
Introduction - Eastern Illinois University
... The phase of a signal is the position of the waveform relative to a given moment of time or relative to time zero. ...
... The phase of a signal is the position of the waveform relative to a given moment of time or relative to time zero. ...
Chapter 1 Problems
... Problem 39 The main disadvantage of the phase method in generating SSB is: a. the complex method of mixing the carrier with the intelligence signal. b the complex method used to amplify the resulting SSB signal. c. the complex design of the 90 degree phase shifting network for the intelligence sign ...
... Problem 39 The main disadvantage of the phase method in generating SSB is: a. the complex method of mixing the carrier with the intelligence signal. b the complex method used to amplify the resulting SSB signal. c. the complex design of the 90 degree phase shifting network for the intelligence sign ...
Amateur Extra Licensing Class
... A color TV signal starts off looking just like a black-and-white signal. An extra chrominance signal is added by superimposing a 3.579545 MHz sine wave onto the standard black-and-white signal following the horizontal sync pulse consisting of eight cycles of the 3.579545 MHz sine wave called the col ...
... A color TV signal starts off looking just like a black-and-white signal. An extra chrominance signal is added by superimposing a 3.579545 MHz sine wave onto the standard black-and-white signal following the horizontal sync pulse consisting of eight cycles of the 3.579545 MHz sine wave called the col ...
2 chapter
... Thus it has been shown that the equation of an amplitude modulated wave contains three terms. The first term is identical to equation (2) and represent the the unmodulated carrier. It is thus apparent that the process of amplitude modulation has the effect of adding term to the unmodulated wave, rat ...
... Thus it has been shown that the equation of an amplitude modulated wave contains three terms. The first term is identical to equation (2) and represent the the unmodulated carrier. It is thus apparent that the process of amplitude modulation has the effect of adding term to the unmodulated wave, rat ...
Principles of Electronic Communication Systems
... high-frequency components of the modulating signal. Noise is primarily sharp spikes of energy and contains a lot of harmonics and other high-frequency components. To overcome high-frequency noise, a technique known as preemphasis is used. A simple high-pass filter can serve as a transmitter’s preemp ...
... high-frequency components of the modulating signal. Noise is primarily sharp spikes of energy and contains a lot of harmonics and other high-frequency components. To overcome high-frequency noise, a technique known as preemphasis is used. A simple high-pass filter can serve as a transmitter’s preemp ...
PDF of the lab
... Pulse Amplitude Modulation is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses. The output is a series of pulses, the amplitude of which vary in proportion to the modulating signal. The samples are taken at regular interval of time. ...
... Pulse Amplitude Modulation is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses. The output is a series of pulses, the amplitude of which vary in proportion to the modulating signal. The samples are taken at regular interval of time. ...
Amplitude Modulation
... unnecessary mathematics. Please do not think that without all of the mathematics we are shortchanging the subject. I have work with many trainees, who have come straight out of university, and when I have asked them about amplitude modulation they reel off a whole set of mathematical equations in an ...
... unnecessary mathematics. Please do not think that without all of the mathematics we are shortchanging the subject. I have work with many trainees, who have come straight out of university, and when I have asked them about amplitude modulation they reel off a whole set of mathematical equations in an ...
ECE 4117 Experiment 3 Frequency Modulation ECE 4117
... The signal is shifted to its broadcast frequency, where it completes the modulated transmission signal. The signal would be ready to be broadcast over the air to the receiver. This step is usually handled in the USRP, so this signal is not necessary in a transmit layout. It is shown here as an examp ...
... The signal is shifted to its broadcast frequency, where it completes the modulated transmission signal. The signal would be ready to be broadcast over the air to the receiver. This step is usually handled in the USRP, so this signal is not necessary in a transmit layout. It is shown here as an examp ...
Systematic Design of Space-Time Trellis Codes for Wireless
... Then m(t)cos( c t ) cos(MIX t ) 21 m( t )[cos(( c MIX )t ) cos(( c MIX )t )] 21 m( t )[cos(( 2 c I )t ) cos(( I )t )] ...
... Then m(t)cos( c t ) cos(MIX t ) 21 m( t )[cos(( c MIX )t ) cos(( c MIX )t )] 21 m( t )[cos(( 2 c I )t ) cos(( I )t )] ...
ppt
... Then m(t)cos( c t ) cos(MIX t ) 21 m( t )[cos(( c MIX )t ) cos(( c MIX )t )] 21 m( t )[cos(( 2 c I )t ) cos(( I )t )] ...
... Then m(t)cos( c t ) cos(MIX t ) 21 m( t )[cos(( c MIX )t ) cos(( c MIX )t )] 21 m( t )[cos(( 2 c I )t ) cos(( I )t )] ...
amplitude modulation
... – The first step in generating an SSB signal is to suppress the carrier, leaving the upper and lower sidebands. – This type of signal is called a double-sideband suppressed carrier (DSSC) signal. No power is wasted on the carrier. – A balanced modulator is a circuit used to produce the sum and diffe ...
... – The first step in generating an SSB signal is to suppress the carrier, leaving the upper and lower sidebands. – This type of signal is called a double-sideband suppressed carrier (DSSC) signal. No power is wasted on the carrier. – A balanced modulator is a circuit used to produce the sum and diffe ...
Lab 1: AMPLITUDE MODULATION
... Investigate the time domain waveform of the AM signal for m = 0.7 and 1.5. Sketch the waveforms observed and compare their envelopes with the message waveform. Replace the 100 kHz carrier with the 16.6 kHz carrier available from the trunks panel. What is the effect of decreasing the carrier frequenc ...
... Investigate the time domain waveform of the AM signal for m = 0.7 and 1.5. Sketch the waveforms observed and compare their envelopes with the message waveform. Replace the 100 kHz carrier with the 16.6 kHz carrier available from the trunks panel. What is the effect of decreasing the carrier frequenc ...
Short Wave receiver
... Circuit diagram 1 SW receiver for 4.5 - 11 MHz The design is derived from a circuit published in the October 1999 issue of the magazine Elektuur. After building the circuit it just worked ! The circuit was built using the "dead bug" method (so not etched PCBs). As told, the frequency range stretche ...
... Circuit diagram 1 SW receiver for 4.5 - 11 MHz The design is derived from a circuit published in the October 1999 issue of the magazine Elektuur. After building the circuit it just worked ! The circuit was built using the "dead bug" method (so not etched PCBs). As told, the frequency range stretche ...
Chapter 5
... = m(t)/2 . cos(Δωt) ß The beating factor (being distorted) The coherent demodulator must be synchronized with the modulator both in frequency and phase! Disadvantages: 1. It transmits both sidebands which contain identical information and thus waste the channel bandwidth resources; 2. It requires a ...
... = m(t)/2 . cos(Δωt) ß The beating factor (being distorted) The coherent demodulator must be synchronized with the modulator both in frequency and phase! Disadvantages: 1. It transmits both sidebands which contain identical information and thus waste the channel bandwidth resources; 2. It requires a ...
Single-sideband modulation
In radio communications, Single-SideBand modulation (SSB) or Single-SideBand Suppressed-Carrier (SSB-SC) is a refinement of amplitude modulation which uses transmitter power and bandwidth more efficiently. Amplitude modulation produces an output signal that has twice the bandwidth of the original baseband signal. Single-sideband modulation avoids this bandwidth doubling, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver.