A Baseband Recorder for Radio Pulsar Observations

Details A Baseband Recorder for Radio Pulsar Observations A Baseband Recorder for Radio Pulsar Observations

1999-12-14

arxiv.org/abs/astro-ph/9912272v2

Astronomy and Astrophysics

Astrophysics

20 pages, 8 figures. To appear in MNRAS. Corrected typo in and text near equation 2

Scientific paper

10.1046/j.1365-8711.2000.03306.x

Digital signal recorders are becoming widely used in several subfields of centimetre-wavelength radio astronomy. We review the benefits and design considerations of such systems and describe the Princeton Mark IV instrument, an implementation designed for coherent-dedispersion pulsar observations. Features of this instrument include corrections for the distortions caused by coarse quantization of the incoming signal, as well algorithms which effectively excise both narrowband and broadband radio-frequency interference. Observations at 430 MHz using the Mark IV system in parallel with a system using a 250 kHz filter bank and incoherent dedispersion demonstrated timing precision improvement by a factor of 3 or better for typical millisecond pulsars.

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