Chapter 1 Data Communications and Networks Overview
... • Signal received may differ from signal transmitted • Analog - degradation of signal quality • Digital - bit errors • Caused by —Attenuation and attenuation distortion —Delay distortion —Noise ...
... • Signal received may differ from signal transmitted • Analog - degradation of signal quality • Digital - bit errors • Caused by —Attenuation and attenuation distortion —Delay distortion —Noise ...
Double Sideband (DSB) and Amplitude Modulation
... occurring on this clock will generate a narrow pulse on the Twin Pulse Generator output. Rotate the width knob fully counter-clockwise, in order to produce the narrowest possible pulse. Place the Twin Pulse Generator output on the input of a Tuneable LPF. Adjust the bandwidth of this filter to appro ...
... occurring on this clock will generate a narrow pulse on the Twin Pulse Generator output. Rotate the width knob fully counter-clockwise, in order to produce the narrowest possible pulse. Place the Twin Pulse Generator output on the input of a Tuneable LPF. Adjust the bandwidth of this filter to appro ...
Teaming an AWG with a Digitizer for a Stimulus
... The figure shows the steps in creating the chirp. It starts in the upper left grid where linearly swept sine and cosine waveforms are shown in the time domain along with the equations used to create them. These signals are in quadrature representing the in-phase (I) and Quadrature (Q) components of ...
... The figure shows the steps in creating the chirp. It starts in the upper left grid where linearly swept sine and cosine waveforms are shown in the time domain along with the equations used to create them. These signals are in quadrature representing the in-phase (I) and Quadrature (Q) components of ...
- MATEC Web of Conferences
... difficult to be measured in general circuit. In the phaselocked-loop circuit, the function of tracking frequency and locking phase are achieved through the feedback loop. After phase-locked-loop added in the phase sensitive detection circuit, the carrier signal is no longer used as reference signal ...
... difficult to be measured in general circuit. In the phaselocked-loop circuit, the function of tracking frequency and locking phase are achieved through the feedback loop. After phase-locked-loop added in the phase sensitive detection circuit, the carrier signal is no longer used as reference signal ...
Development OF PROTOTYPE Digital LLRF system at RRCAT
... components like mixers, amplifiers, filters, circulators etc. In other 3U unit all digital components like FPGA board, single to differential converter, ADC and DAC are housed along with I/Q modulator. Photograph of DLLRF control rack installed in Inud-s2 is shown in Figure 7. ...
... components like mixers, amplifiers, filters, circulators etc. In other 3U unit all digital components like FPGA board, single to differential converter, ADC and DAC are housed along with I/Q modulator. Photograph of DLLRF control rack installed in Inud-s2 is shown in Figure 7. ...
True-time delay line with separate carrier tuning
... delay time and the signal bandwidth is constant. As a result, only modest time delay can be expected for broadband baseband signals. On the other hand, for optical communication systems, the small bandwidth of the SBS gain profile (~40 MHz in standard optical fibers) results in large distortion of t ...
... delay time and the signal bandwidth is constant. As a result, only modest time delay can be expected for broadband baseband signals. On the other hand, for optical communication systems, the small bandwidth of the SBS gain profile (~40 MHz in standard optical fibers) results in large distortion of t ...
multiplex signal generator ksg3420/3421
... LCD display of the instrument or sent to a PC over the GPIB or RS-232C interface for creation or editing on the PC. The output data is modified in real-time. Up to 100 different data sets can be saved in the instrument’s memory. ...
... LCD display of the instrument or sent to a PC over the GPIB or RS-232C interface for creation or editing on the PC. The output data is modified in real-time. Up to 100 different data sets can be saved in the instrument’s memory. ...
Base Station Receiver Design Using a Direct
... High Frequency Termination of the Baseband I/Q Outputs One key advantage of the direct conversion architecture is that it eliminates the classical image rejec- ...
... High Frequency Termination of the Baseband I/Q Outputs One key advantage of the direct conversion architecture is that it eliminates the classical image rejec- ...
HFA3101 - Intersil
... The process of frequency doubling is also understood by having the same signal being fed to both modulating and carrier ports. The output frequency will be the sum of ωC and ωM which is equivalent to the product of the input frequency by 2 and a zero Hz or DC frequency equivalent to the difference o ...
... The process of frequency doubling is also understood by having the same signal being fed to both modulating and carrier ports. The output frequency will be the sum of ωC and ωM which is equivalent to the product of the input frequency by 2 and a zero Hz or DC frequency equivalent to the difference o ...
Signal Issue 35 Ampliphase` transmitter
... fed to two identical modulation chains, each comprising four cascaded 5693 ‘modulation shifter’ amplifiers and a 5692 ‘phase modulator’ triode. The first stage is ‘DC modulated’ by a variable resistance (no triode in this stage) which is used to set the quiescent phase difference at 135°, determinin ...
... fed to two identical modulation chains, each comprising four cascaded 5693 ‘modulation shifter’ amplifiers and a 5692 ‘phase modulator’ triode. The first stage is ‘DC modulated’ by a variable resistance (no triode in this stage) which is used to set the quiescent phase difference at 135°, determinin ...
05-SignalEncodingTechniques
... When the analog waveform is changing very slowly, there will be quantizing noise. This noise increases as is increased. when the analog waveform is changing more rapidly than the staircase can follow, there is slope overload noise ...
... When the analog waveform is changing very slowly, there will be quantizing noise. This noise increases as is increased. when the analog waveform is changing more rapidly than the staircase can follow, there is slope overload noise ...
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 ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... from the collector output of the transistors representing the high – and – low – logic signal frequency of the baseband information forms an input to an op-amp summing circuit U1 via the two input resistors [13]4. The fsk signal developed is fed to a pre op-amp U1 designed to give a voltage gain of ...
... from the collector output of the transistors representing the high – and – low – logic signal frequency of the baseband information forms an input to an op-amp summing circuit U1 via the two input resistors [13]4. The fsk signal developed is fed to a pre op-amp U1 designed to give a voltage gain of ...
CHAPTER THREE WIRELESS BI-DIRECTIONAL DATA COMMUNICATION 3.1 INTRODUCTION
... iii) Binary Phase Shift Keying (BPSK)– The phase of a constant amplitude carrier is switched between two values corresponding to binary 1 and binary 0 respectively. The two phases are separated by 180°, and can be described by f c (t) = m(t)cos ω ct ,for − T 2 ≤ t ≤ T 2 , where T is the base band pu ...
... iii) Binary Phase Shift Keying (BPSK)– The phase of a constant amplitude carrier is switched between two values corresponding to binary 1 and binary 0 respectively. The two phases are separated by 180°, and can be described by f c (t) = m(t)cos ω ct ,for − T 2 ≤ t ≤ T 2 , where T is the base band pu ...
A Review of Carrier Based Modulation Techniques
... inverters and controlled converters to produce output voltages and currents with higher qualities for different types of loads. The operation in the switched mode ensures that the efficiency of power conversion is high [1]. In order to obtain desired amplitude and frequency with the desired quality ...
... inverters and controlled converters to produce output voltages and currents with higher qualities for different types of loads. The operation in the switched mode ensures that the efficiency of power conversion is high [1]. In order to obtain desired amplitude and frequency with the desired quality ...
CHAPTER 13 MODULATION 13-1 Chapter 13 MODULATION
... stations on the same or adjacent frequencies. Contrary to popular belief, AM transmissions can be of subjectively quite high quality, even in spite of their restricted audio bandwidth. The main stumbling block is AM receivers, which are almost invariably constructed with demodulators of abysmal qual ...
... stations on the same or adjacent frequencies. Contrary to popular belief, AM transmissions can be of subjectively quite high quality, even in spite of their restricted audio bandwidth. The main stumbling block is AM receivers, which are almost invariably constructed with demodulators of abysmal qual ...
S1-P210
... frequency variation. This demodulated output contains high frequency components. So a low pass filter is needed to recover the original message signal. C. Power line isolation This is the most important part of PLC that should be designed very carefully. As the modulated signal is transmitted over p ...
... frequency variation. This demodulated output contains high frequency components. So a low pass filter is needed to recover the original message signal. C. Power line isolation This is the most important part of PLC that should be designed very carefully. As the modulated signal is transmitted over p ...
Lab 11 - Physics Department, Princeton University
... lecture and class. You will use your knowledge of electronic circuits to construct an AM radio and understand how it works. The term “radio” includes both the broadcast and reception of an audio signal, whose frequencies are between about 100 and 10,000 Hz. An immediate difficulty is that direct bro ...
... lecture and class. You will use your knowledge of electronic circuits to construct an AM radio and understand how it works. The term “radio” includes both the broadcast and reception of an audio signal, whose frequencies are between about 100 and 10,000 Hz. An immediate difficulty is that direct bro ...
ph104exp11_AM_Radio_04 - Physics Department, Princeton
... Your breadboard has the flexibility to accommodate most of these tests with minimal disruption to the wiring of the rest of the circuit. 6a. The Diode Connect the output of the Wavetek generator to test points a and b shown on the lower figure on p.6, and use “tee” to send a copy of the output to Ch ...
... Your breadboard has the flexibility to accommodate most of these tests with minimal disruption to the wiring of the rest of the circuit. 6a. The Diode Connect the output of the Wavetek generator to test points a and b shown on the lower figure on p.6, and use “tee” to send a copy of the output to Ch ...
DELTA-SIGMA MODULATION IN SINGLE NEURONS Mats Høvin
... the clock frequency, a delta-sigma bit-stream can approach a pulse-coded representation with arbitrary accuracy. 1. INTRODUCTION Biological neurons communicate with each other by spikes or pulse trains. The information is not encoded by the shape of the pulses, but by the arrival time and the correl ...
... the clock frequency, a delta-sigma bit-stream can approach a pulse-coded representation with arbitrary accuracy. 1. INTRODUCTION Biological neurons communicate with each other by spikes or pulse trains. The information is not encoded by the shape of the pulses, but by the arrival time and the correl ...
Principles of Electronic Communication Systems
... DSB signal, suppressing the carrier and leaving only the sum and difference frequencies at the output. The output of a balanced modulator can be further processed by filters or phase-shifting circuitry to eliminate one of the sidebands, resulting in a SSB signal. Types of balanced modulators inc ...
... DSB signal, suppressing the carrier and leaving only the sum and difference frequencies at the output. The output of a balanced modulator can be further processed by filters or phase-shifting circuitry to eliminate one of the sidebands, resulting in a SSB signal. Types of balanced modulators inc ...
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.