A Total Power Filter Spectrometer for Radio Astronomy

A system is described which employs two decade sets of local oscillators to separate signal power into a bank of 100 identical filters. By commutating the local oscillators, filter instabilities are removed from the resulting output and local oscillator stability is the remaining factor. Practical l...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 1973-01, Vol.22 (3), p.279-281
Main Author: McLeish, C. W.
Format: Article
Language:English
Subjects:
Clocks
Counting circuits
Extraterrestrial measurements
Induction motors
Local oscillators
Power filters
Radio astronomy
Spectroscopy
Synchronous motors
Torque
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Description
Summary:A system is described which employs two decade sets of local oscillators to separate signal power into a bank of 100 identical filters. By commutating the local oscillators, filter instabilities are removed from the resulting output and local oscillator stability is the remaining factor. Practical limits on this are discussed in relation to the total output uncertainty of the spectrometer.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.1973.4314165