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Pin Description
Pin Description

... module offers narrow band VHF modules for operation in the various license exempt bands allocated to narrow band application. Utilising narrow band RF technology, the Genesis FM transmitter is iniatially available on four separate channels and offering 10mW RF output power. Genesis narrow-band RF te ...
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... transverter interconnecting cables, interfering with signals being received from 220 MHz. Also, when more than one transverter with a 28-MHz IF is operated in the same room (at a multioperator VHF contest station, for example), it is not uncommon to hear signals from the other IF transceivers. Oscil ...
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... represented by binary 1 and 0, respectively. Thus stating that “A is true” and “B is false” is equivalent to stating A=1 and B=0. The utility of switching algebra is that we can perform elaborate logical operations with simple Boolean arithmetic. All modern control systems are digital, utilizing thi ...
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... This empirically determined impedance takes into account certain physical limitations, such as power supply voltage, and the effective current sourcing capability of the transistor and the DC supply. Most often, ZLoad is a compromise between an impedance that allows the device to develop maximum out ...
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... ionization in silicon to provide gain in the charge domain [1]. This enables performance with an input equivalent noise of less than 1 rms electron at pixel rates up to and beyond those required for TV imaging applications. The structure and mode of operation of the EMCCD is well known [2,3] and so ...
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... the waves; i.e., the velocity and phase are not functions of the frequency. In Fig. 1a the normalized amplitudes of U and Ware plotted as a function of normalized depths from the surface. From this plot, details of particle motion as shown in Fig. 1b may be ascertained. At the surface, particles rot ...
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... The sounder may not be heard. The loudness of the sounder meets (or exceeds) current Underwriters Laboratories’ standards. Studies have shown that the low frequency sounder (520Hz) is more effective at waking individuals in sleeping spaces, especially individuals that may have recently used drugs or ...
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... simulation, a new PCB, and additional components all will be required. However, this is not always necessary or even possible within given time and cost constraints. The process described in this application note was achieved using only Smith chart and transmission line calculation software, demonst ...
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... 1. Fabrication of Graphene on Silicon Nitride Drums: 900 nm thick thermal oxide (wet oxide, 980 C) grown on a double-side-polished silicon wafer. This oxide provides electrical isolation and etch isolation from a potassium hydroxide (KOH) etch. Stoichiometric high-stress nitride (60 nm thick) is gr ...
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... The DAC38J84 has an internal PLL that can be used to generate the high-frequency DAC output clock from a lower frequency clock provided to the DACCLK pins. This can simplify board layout and relax the requirements for the external clock. The clock at the DACCLK pins first goes through the N divider, ...
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Heterodyne



Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies. Heterodyning is used to shift one frequency range into another, new one, and is also involved in the processes of modulation and demodulation. The two frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. In the most common application, two signals at frequencies f1 and f2 are mixed, creating two new signals, one at the sum f1 + f2 of the two frequencies, and the other at the difference f1 − f2. These new frequencies are called heterodynes. Typically only one of the new frequencies is desired, and the other signal is filtered out of the output of the mixer. Heterodynes are related to the phenomenon of ""beats"" in acoustics.A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.
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