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A wideband correlator system with a bandwidth of 16 GHz or more is required for Array for Microwave Background Anisotropy (AMiBA) to achieve the sensitivity of 10μK in one hour of observation. Double-balanced diode mixers were used as multipliers in 4-lag correlator modules. Several wideband modules were developed for IF signal distribution between… (More)
We report the operation and control system of the Array for Microwave Background Anisotropy (AMIBA), a radio astronomical telescope which has been completed and operating smoothly on the summit of Mauna Loa, Hawaii since 2005. The telescope mount with six meters diameter is the largest steward platform ever employed for astronomical purposes.
A wideband analog correlator has been constructed for the Yuan-Tseh Lee Array for Microwave Background Anisotropy. Lag correlators using analog mul-tipliers provide large bandwidth and moderate frequency resolution. Broadband IF distribution, backend signal processing and control are described. Operating conditions for optimum sensitivity and linearity are… (More)
This paper describes the development of a photonic local oscillator (LO) source based on a three-stage Mach-Zehnder modulator (MZM) device. The MZM laser synthesizer demonstrates the feasibility of providing the photonic reference LO for the Atacama Large Millimeter Array telescope located in Chile. This MZM approach to generating an LO by RF modulation of… (More)