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It was used as a local oscillator in some radar receivers and a modulator in microwave transmitters in the 1950s and 1960s, but is now obsolete, replaced by semiconductor microwave devices. In the reflex klystron the electron beam passes through a single resonant cavity. The electrons are fired into one end of the tube by an electron gun. After ...
ASTEC UM 1286 UHF modulator, top cover taken off. An RF modulator (radio frequency modulator) is an electronic device used to convert signals from devices such as media players, VCRs and game consoles to a format that can be handled by a device designed to receive a modulated RF input, such as a radio or television receiver.
SDRstick UDPSDR-HF1 [99] Please Note: A functional receiver requires both the UDPSDR-HF1 and a BeMicro SDK FPGA development board: Pre-built 0.1 – 30 MHz ? No 80 Msps 0/1 1G Ethernet via BeMicroCV-A9 Yes Yes Yes Altera (as an add-on) SDR MK1.5 'Andrus' [100] Pre-built, Open Source Design 5 kHz – 31 MHz (1.7 GHz downconverter opt.) ? No 64 ...
Modulators can consist of both forward-biased PIN diodes, which generally generate large phase-shifts but suffer of lower speeds, [18] as well as of reverse-biased p–n junctions. [19] A prototype optical interconnect with microring modulators integrated with germanium detectors has been demonstrated.
The Stanford University Libraries Digital Image Collections is an online collection of digital images called Image Gallery, maintained by the Stanford University Libraries. The site provides access to over 50,000 digital images scanned from collections owned by the Stanford Libraries .
Stanford bunny: 1993-94 [11] Greg Turk, Marc Levoy at Stanford University: Ceramic rabbit [12] 69,451 triangles [11] Figurine of unknown authorship and licensing status, scan itself released under a two-clause BSD license. A test of range scanning physical objects. Originally .ply file. Stanford dragon: 1996 [11] Stanford University: Chinese ...
A direct-conversion receiver (DCR), also known as homodyne, synchrodyne, or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal.
The receivers were tuned at the pilot's control box by electrical cables and long mechanical tuning shafts, allowing remote control of power, mode, frequency, and volume. AN/ARC-5 set composition and control differed markedly from the earlier systems. Three-unit receiver racks were still predominant, but the receiver line-up was quite different.