
5-0 - Amateur Radio Equipment
... FM handheld or mobile transceiver is overdeviating? A. Talk louder into the microphone B. Let the transceiver cool off C. Change to a higher power level D. Talk farther away from the microphone ...
... FM handheld or mobile transceiver is overdeviating? A. Talk louder into the microphone B. Let the transceiver cool off C. Change to a higher power level D. Talk farther away from the microphone ...
The General Class Question Pool 2011-2015 Study Notes
... None of the amateur bands is shared with the Citizens Radio Service. 200 feet is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport. When General Clas ...
... None of the amateur bands is shared with the Citizens Radio Service. 200 feet is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport. When General Clas ...
Amateur Extra Licensing Class
... A. A pulse of relatively short duration is sent; a relatively long period of time separates each pulse B. A pulse of relatively long duration is sent; a relatively short period of time separates each pulse C. A group of short pulses are sent in a relatively short period of time; a relatively long pe ...
... A. A pulse of relatively short duration is sent; a relatively long period of time separates each pulse B. A pulse of relatively long duration is sent; a relatively short period of time separates each pulse C. A group of short pulses are sent in a relatively short period of time; a relatively long pe ...
HF Station Installation
... with a square wave. • A square wave consists of a fundamental and an infinite number of odd harmonics. • Therefore, a CW signal with a square keying envelope is infinitely wide! ...
... with a square wave. • A square wave consists of a fundamental and an infinite number of odd harmonics. • Therefore, a CW signal with a square keying envelope is infinitely wide! ...
The Microwave SDR project
... radio apart from the Ten-Tec Orion, and is significantly cheaper than all other top-end transceivers even with the additional cost of a high-performance sound card. The reason for this is that by applying the proper care and attention to the design, some components such as IF filters can be removed ...
... radio apart from the Ten-Tec Orion, and is significantly cheaper than all other top-end transceivers even with the additional cost of a high-performance sound card. The reason for this is that by applying the proper care and attention to the design, some components such as IF filters can be removed ...
Chapter 1 Data Communications and Networks Overview
... • Can be shown (Fourier analysis) that any signal is made up of component sine waves ...
... • Can be shown (Fourier analysis) that any signal is made up of component sine waves ...
Technics_Pro_1980 - Preservation Sound
... Assuming that this resistance amounts to 2.5 ohms, equivalent noise voltage at the input would therelore come to -157d8V. The SU9070 pre preamp's -157dBV figure is astonishingly close to this ideal. tnput sensitivity is rated at 60fV; output is 2.5mV. S/N ratio is 72d8, quite an achievement in a pre ...
... Assuming that this resistance amounts to 2.5 ohms, equivalent noise voltage at the input would therelore come to -157d8V. The SU9070 pre preamp's -157dBV figure is astonishingly close to this ideal. tnput sensitivity is rated at 60fV; output is 2.5mV. S/N ratio is 72d8, quite an achievement in a pre ...
The United Kingdom Amateur Radio (Foundation) Licence
... To use this method, cover the letter which you need to find and then do as the triangle says e.g. cover P, the I and V are beside each other = multiply. If you cover I, then you are left with P/V hence you divide P by V. Remember that this method only works if the triangle is drawn correctly, as sho ...
... To use this method, cover the letter which you need to find and then do as the triangle says e.g. cover P, the I and V are beside each other = multiply. If you cover I, then you are left with P/V hence you divide P by V. Remember that this method only works if the triangle is drawn correctly, as sho ...
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- ...
Audio Technica Cut Sheet
... positive acoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc. An integral 80 Hz hi-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The high-pass posi ...
... positive acoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc. An integral 80 Hz hi-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The high-pass posi ...
German Radios
... amplifiers for high sensitivity, to receive the weakest signals. A switch, driven by the largest knob on the right, selects the AM bandwidth. The stereo audio section has been designed to simply give the best. It uses seven tubes plus the triode section of the EABC80, as noise silencer. Each channel ...
... amplifiers for high sensitivity, to receive the weakest signals. A switch, driven by the largest knob on the right, selects the AM bandwidth. The stereo audio section has been designed to simply give the best. It uses seven tubes plus the triode section of the EABC80, as noise silencer. Each channel ...
Technics
... The model number of this product may be found on the back of tlre unit; and the serial number on the label affixed to the back of the unit. You should note the model and serial numbers of this unit in the space provided, and retain this booklet as a permanent record of your purchase to aid in identi ...
... The model number of this product may be found on the back of tlre unit; and the serial number on the label affixed to the back of the unit. You should note the model and serial numbers of this unit in the space provided, and retain this booklet as a permanent record of your purchase to aid in identi ...
PRACTISE AND REVISION KIT
... The distance between the transmitter and the nearest point at which the received signal is received from ionospheric propagation is known as the ...
... The distance between the transmitter and the nearest point at which the received signal is received from ionospheric propagation is known as the ...
179 The priority on usage of any amateur radio repeater is
... A spectrum analyser displays signals in the time domain; an oscilloscope displays signals in the frequency domain A spectrum analyzer displays signals in the frequency domain; an oscilloscope displays signals in the time domain A spectrum analyzer displays radio frequencies; an oscilloscope displays ...
... A spectrum analyser displays signals in the time domain; an oscilloscope displays signals in the frequency domain A spectrum analyzer displays signals in the frequency domain; an oscilloscope displays signals in the time domain A spectrum analyzer displays radio frequencies; an oscilloscope displays ...
PRACTISE AND REVISION KIT
... What is the primary source of noise that can be heard in a VHF/UHF-band receiver with an antenna connected? a) b) c) d) ...
... What is the primary source of noise that can be heard in a VHF/UHF-band receiver with an antenna connected? a) b) c) d) ...
Wireless FM Transmitter
... First, use a battery-powered pocket radio as a receiver. AC powered boom-boxes and home stereos (110 or 220 V) are not recommended; battery-powered radios are much better at receiving transmissions than AC-powered units. 1. Tune your radio to dead air, i.e. frequencies within the FM radio band that ...
... First, use a battery-powered pocket radio as a receiver. AC powered boom-boxes and home stereos (110 or 220 V) are not recommended; battery-powered radios are much better at receiving transmissions than AC-powered units. 1. Tune your radio to dead air, i.e. frequencies within the FM radio band that ...
Unit 4 Frequency Modulation
... Heterodyne receivers "mix" all of the incoming signals with an internally generated waveform called the local oscillator. The user tunes the radio by adjusting the set's oscillator frequency, In the mixer stage of a receiver, the local oscillator signal multiplies with the incoming signals, which sh ...
... Heterodyne receivers "mix" all of the incoming signals with an internally generated waveform called the local oscillator. The user tunes the radio by adjusting the set's oscillator frequency, In the mixer stage of a receiver, the local oscillator signal multiplies with the incoming signals, which sh ...
SFX-424G Synchronous Clock Generators Applications
... 3.3V High Precision PLL Jitter Generation OC-192 Compliant Surface Mount Accepts up to 4 Inputs from an External MUX Inputs Compatible with CMOS/LVDS/LVPECL Frequency Translation up to 800 MHz Alarm detection for Loss of Lock/ Loss of Reference condition ROHS Compliant ...
... 3.3V High Precision PLL Jitter Generation OC-192 Compliant Surface Mount Accepts up to 4 Inputs from an External MUX Inputs Compatible with CMOS/LVDS/LVPECL Frequency Translation up to 800 MHz Alarm detection for Loss of Lock/ Loss of Reference condition ROHS Compliant ...
Basic Communications Theory
... Phase: Relative measure of the difference in time between waves Frequency: Absolute measure of the number of times a wave repeats per unit time ...
... Phase: Relative measure of the difference in time between waves Frequency: Absolute measure of the number of times a wave repeats per unit time ...
AN7600 - Synergy Microwave
... for fast in-circuit implementation. What is the need for synthesizers having an integrated controller? There are several good reasons to do so! • The operational settings of the PLL chip have to be calculated for each frequency setting to be within the operational specifications. For example in wide ...
... for fast in-circuit implementation. What is the need for synthesizers having an integrated controller? There are several good reasons to do so! • The operational settings of the PLL chip have to be calculated for each frequency setting to be within the operational specifications. For example in wide ...
History of Frequency Modulation - Hik
... electrical equipment and the earth's atmosphere. However, Edwin Armstrong should be known for inventing three key innovations: regeneration, superheterodyning, and frequency modulation. ...
... electrical equipment and the earth's atmosphere. However, Edwin Armstrong should be known for inventing three key innovations: regeneration, superheterodyning, and frequency modulation. ...
Automating the Screening of Microphonic Defects in Automotive
... than others. In the early 20th century, aircraft receivers suffered from microphonic because the filaments and grids in vacuum tubes could ...
... than others. In the early 20th century, aircraft receivers suffered from microphonic because the filaments and grids in vacuum tubes could ...
The Yaesu FT200
... The design first saw the light of day in the late 60's in a grey and silver case. It was also sold under the guise of the Sommerkamp FT250 (blue case) and the Henry Radio "Tempo One" (black and silver case, above). It had a short reincarnation in the early 70's in an all black case and was then sold ...
... The design first saw the light of day in the late 60's in a grey and silver case. It was also sold under the guise of the Sommerkamp FT250 (blue case) and the Henry Radio "Tempo One" (black and silver case, above). It had a short reincarnation in the early 70's in an all black case and was then sold ...
RECOMMENDATION ITU-R BS.468-4*,**
... The instrument shall be calibrated such that a steady input signal of 1 kHz sine-wave at 0.775 V r.m.s., having less than 1% total harmonic distortion, shall give a reading of 0.775 V, 0 dB. The scale should have a calibrated range of at least 20 dB with the indication corresponding to 0.775 V (or 0 ...
... The instrument shall be calibrated such that a steady input signal of 1 kHz sine-wave at 0.775 V r.m.s., having less than 1% total harmonic distortion, shall give a reading of 0.775 V, 0 dB. The scale should have a calibrated range of at least 20 dB with the indication corresponding to 0.775 V (or 0 ...
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.