A forum for the exchange of circuits, systems
... Some amount of analog signal conditioning is always required before the ADC and after the DAC. Even functions that may at first appear to be digital are often analog at their very heart. Take phased-lock loops (PLLs), for example. These include phase detectors, filters, and oscillators—all analog func ...
... Some amount of analog signal conditioning is always required before the ADC and after the DAC. Even functions that may at first appear to be digital are often analog at their very heart. Take phased-lock loops (PLLs), for example. These include phase detectors, filters, and oscillators—all analog func ...
Amplitude and Angle Modulation
... Waveforms of Plate Modulator For positive cycle of audio triode T1 ON and triode T2 OFF, positive cycle exist across modulating transformer. For negative cycle of audio T1 OFF and T2 ON, negative cycle exist across transformer. Vbb will come in series with modulating voltage; which forms total bias ...
... Waveforms of Plate Modulator For positive cycle of audio triode T1 ON and triode T2 OFF, positive cycle exist across modulating transformer. For negative cycle of audio T1 OFF and T2 ON, negative cycle exist across transformer. Vbb will come in series with modulating voltage; which forms total bias ...
Lecture material
... The primary disadvantage is their bandwidth is inconsistent and varies with center frequency when tuned over a wide range of input frequencies. This is caused by a phenomenon called the skin effect. At radio frequencies, current flow is limited to the outermost area of a conductor; thus, the higher ...
... The primary disadvantage is their bandwidth is inconsistent and varies with center frequency when tuned over a wide range of input frequencies. This is caused by a phenomenon called the skin effect. At radio frequencies, current flow is limited to the outermost area of a conductor; thus, the higher ...
Keysight Technologies, Inc E5052B Signal Source Analyzer
... The Signal Source Analyzer provides dual channel measurements to fully characterize switching signal sources. In the wideband mode, the entire behavior of frequency jumps can be observed. In the narrowband mode, you can analyze detailed information of frequency, phase, and power over time. All of th ...
... The Signal Source Analyzer provides dual channel measurements to fully characterize switching signal sources. In the wideband mode, the entire behavior of frequency jumps can be observed. In the narrowband mode, you can analyze detailed information of frequency, phase, and power over time. All of th ...
Si4x55-C - Silicon Labs
... programmable GPIO or via the standard SPI bus by reading the 64-byte Rx FIFO. A single high-precision local oscillator (LO) is used for both transmit and receive modes since the transmitter and receiver do not operate at the same time. The LO signal is generated by an integrated VCO and Fractiona ...
... programmable GPIO or via the standard SPI bus by reading the 64-byte Rx FIFO. A single high-precision local oscillator (LO) is used for both transmit and receive modes since the transmitter and receiver do not operate at the same time. The LO signal is generated by an integrated VCO and Fractiona ...
Mitrek conversion to Repeater or link
... A typical (commercial) system uses the audio portion of 300Hz~3KHz for signals. This document covering system performance will be somewhat different. It also calls for good technical management. For one, technician organization and discipline is necessary. Plan on what you want to do for a system de ...
... A typical (commercial) system uses the audio portion of 300Hz~3KHz for signals. This document covering system performance will be somewhat different. It also calls for good technical management. For one, technician organization and discipline is necessary. Plan on what you want to do for a system de ...
TSH511
... Infrared stereo headphone application The right side of Figure 21 shows the block diagram of an infrared stereo receiver using the TSH511. The sensitive LNA, directly connected to the photo diode, does not require an external pre-amplifier. After filtering, the amplified signals are limited and demo ...
... Infrared stereo headphone application The right side of Figure 21 shows the block diagram of an infrared stereo receiver using the TSH511. The sensitive LNA, directly connected to the photo diode, does not require an external pre-amplifier. After filtering, the amplified signals are limited and demo ...
Audio Processor for Advanced TV with ADAV4622
... The ADAV4622 includes multichannel digital inputs and outputs. In addition, digital input channels can be routed through integrated sample rate converters (SRC), which are capable of supporting any arbitrary sample rate from 5 kHz to 50 kHz. ...
... The ADAV4622 includes multichannel digital inputs and outputs. In addition, digital input channels can be routed through integrated sample rate converters (SRC), which are capable of supporting any arbitrary sample rate from 5 kHz to 50 kHz. ...
Requirements for Integrated Services Digital Network Terminal
... The shape of an isolated pulse shall fall within the mask in Figure 3.3(d) when measured at the end of the shortest cable specified by the applicant. Note: The voltage within a time slot containing a zero may be greater than this limit because of the undershoot remaining from preceding pulses (i.e. ...
... The shape of an isolated pulse shall fall within the mask in Figure 3.3(d) when measured at the end of the shortest cable specified by the applicant. Note: The voltage within a time slot containing a zero may be greater than this limit because of the undershoot remaining from preceding pulses (i.e. ...
No Nonsense General Class License Study Guide
... There are a number of practical considerations you must make when using electronic components in circuits. For example, the resistance of a resistor will change depending on the resistor's temperature coefficient if the temperature is increased. (G6A16) One type of resistor that’s commonly used in e ...
... There are a number of practical considerations you must make when using electronic components in circuits. For example, the resistance of a resistor will change depending on the resistor's temperature coefficient if the temperature is increased. (G6A16) One type of resistor that’s commonly used in e ...
impedance stabilization network (isn) for unscreened balanced pairs
... auxiliary equipment (AE) or load which are necessary for the operation of the EUT. The ISN establishes the common-mode termination impedance for the EUT’s telecommunications port during measurement and emulates the unsymmetrical contribution (longitudinal conversion loss, LCL) of the connected line. ...
... auxiliary equipment (AE) or load which are necessary for the operation of the EUT. The ISN establishes the common-mode termination impedance for the EUT’s telecommunications port during measurement and emulates the unsymmetrical contribution (longitudinal conversion loss, LCL) of the connected line. ...
Elec - eHam
... CW (continuous wave) - Morse code. CW is transmitted by on/off keying an RF signal to form dots and dashes. Bandwidth is about 100 Hz. RTTY (radioteletype) - a digital mode, the RF carrier is modulated using a modem. Bandwidth is about 300 Hz. SSB (single sideband) - When an RF carrier is modulated ...
... CW (continuous wave) - Morse code. CW is transmitted by on/off keying an RF signal to form dots and dashes. Bandwidth is about 100 Hz. RTTY (radioteletype) - a digital mode, the RF carrier is modulated using a modem. Bandwidth is about 300 Hz. SSB (single sideband) - When an RF carrier is modulated ...
Signal/One Troubleshooting Guide
... SOLUTION Replace the burned capacitor(s). This can be a difficult job. In some cases, however, only the mica spacer that has burned can be replaced - which is an easier job than replacing the whole capacitor. This can be done by removing the adjusting screw and washer, bending the plates back until ...
... SOLUTION Replace the burned capacitor(s). This can be a difficult job. In some cases, however, only the mica spacer that has burned can be replaced - which is an easier job than replacing the whole capacitor. This can be done by removing the adjusting screw and washer, bending the plates back until ...
Modulation and Demodulation
... required bandwidth to include the sideband frequencies. If the tuned amplifier has insufficient bandwidth, the upper sideband frequencies may not be reproduced by the radio receiver. Example 16.4. A 2500 kHz carrier is modulated by audio signal with frequency span of 50 − 15000 Hz. What are the freq ...
... required bandwidth to include the sideband frequencies. If the tuned amplifier has insufficient bandwidth, the upper sideband frequencies may not be reproduced by the radio receiver. Example 16.4. A 2500 kHz carrier is modulated by audio signal with frequency span of 50 − 15000 Hz. What are the freq ...
Si4770/77-A20 - Silicon Labs
... Comprehensive signal quality metrics: RSSI, SNR, multipath interference, frequency offset, adjacent channel RSSI, frequency deviation, and image RSSI Advanced patented RDS softdecision decoder Advanced, patented FM channel equalizer for multipath interference Dynamic AM/FM channel bandwidth control ...
... Comprehensive signal quality metrics: RSSI, SNR, multipath interference, frequency offset, adjacent channel RSSI, frequency deviation, and image RSSI Advanced patented RDS softdecision decoder Advanced, patented FM channel equalizer for multipath interference Dynamic AM/FM channel bandwidth control ...
Elec - eHam
... Sometimes RF waves are considered to be frequencies between 3 kHz and 300 GHz (giga-hertz). Electrical energy at a frequency of 7125 kHz is in the radio frequency (RF) range. Radio waves are classified as HF, VHF, or UHF according to their wavelength and frequency. Wavelength Frequency HF = high fre ...
... Sometimes RF waves are considered to be frequencies between 3 kHz and 300 GHz (giga-hertz). Electrical energy at a frequency of 7125 kHz is in the radio frequency (RF) range. Radio waves are classified as HF, VHF, or UHF according to their wavelength and frequency. Wavelength Frequency HF = high fre ...
Module 15
... What is required in place of on-air station identification when sending signals to a radio control model using amateur frequencies? A. Voice identification must be transmitted every 10 minutes B. Morse code ID must be sent once per hour C. A label indicating the licensee's name, call sign and addres ...
... What is required in place of on-air station identification when sending signals to a radio control model using amateur frequencies? A. Voice identification must be transmitted every 10 minutes B. Morse code ID must be sent once per hour C. A label indicating the licensee's name, call sign and addres ...
All the Details About Microphones For You
... single fixed frequency, but the more advanced UHF models operate on a user selectable frequency to avoid interference, and allow the use of several microphones at the same time. Almost all wireless microphone systems use wideband FM modulation, which requires approximately 200 kHz of bandwidth to op ...
... single fixed frequency, but the more advanced UHF models operate on a user selectable frequency to avoid interference, and allow the use of several microphones at the same time. Almost all wireless microphone systems use wideband FM modulation, which requires approximately 200 kHz of bandwidth to op ...
UNIT I AMPLITUDE MODULATION Objective:
... square-law detector is used to detect low level modulated signals (i.e., below 1v). It is also based on the switching action or switching characteristics of a diode. It consists of a diode and a resistor-capacitor filter. The operation of the envelope detector is as follows. On a positive half cycle ...
... square-law detector is used to detect low level modulated signals (i.e., below 1v). It is also based on the switching action or switching characteristics of a diode. It consists of a diode and a resistor-capacitor filter. The operation of the envelope detector is as follows. On a positive half cycle ...
HAMTRONICS® R305 UHF FM RECEIVER: INSTALLATION
... with steep skirts for close channel spacing or repeater operation. The i-f selectivity, for instance, is down over 100dB at ±12 kHz away from the carrier, which is 4050 dB better than most transceivers. Low noise fet's and surface mount parts in the front end provide good overload resistance and 0. ...
... with steep skirts for close channel spacing or repeater operation. The i-f selectivity, for instance, is down over 100dB at ±12 kHz away from the carrier, which is 4050 dB better than most transceivers. Low noise fet's and surface mount parts in the front end provide good overload resistance and 0. ...
to a copy of the Auto EAS Siren
... The TAR must be a robust radio receiver with a loudspeaker output designed specifically for warning applications. The unit must be capable of both wall mounting or sitting on a desktop and must include a rubber duck style antenna that can be removed for connection to an outside antenna. The TAR must ...
... The TAR must be a robust radio receiver with a loudspeaker output designed specifically for warning applications. The unit must be capable of both wall mounting or sitting on a desktop and must include a rubber duck style antenna that can be removed for connection to an outside antenna. The TAR must ...
ch-66 - Technology
... the velocity of light i.e. 3 × 10 m/s (approx). The audiofrequency signal which is to be broadcast, is then superimposed on the RF waves, which are known as carrier waves (because they carry A.F. signal through space to distant places). In a way, the carrier waves can be likened to a horse and the a ...
... the velocity of light i.e. 3 × 10 m/s (approx). The audiofrequency signal which is to be broadcast, is then superimposed on the RF waves, which are known as carrier waves (because they carry A.F. signal through space to distant places). In a way, the carrier waves can be likened to a horse and the a ...
2 Use of Electromagnetic Energy and Resultant Noises
... Radio Law stipulates that in the event of problems in radio services caused by unwanted radiation (i.e., disturbance) from a given device or equipment (other than radio or high frequency-based equipment), legal action is possible—for example, to halt the use of the device or equipment in question［10 ...
... Radio Law stipulates that in the event of problems in radio services caused by unwanted radiation (i.e., disturbance) from a given device or equipment (other than radio or high frequency-based equipment), legal action is possible—for example, to halt the use of the device or equipment in question［10 ...
FM broadcasting
FM broadcasting is a VHF broadcasting technology, pioneered by Edwin Howard Armstrong, which uses frequency modulation (FM) to provide high-fidelity sound over broadcast radio. The term ""FM band"" describes the frequency band in a given country which is dedicated to FM broadcasting. This term is slightly misleading, as it equates a modulation method with a range of frequencies.