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Millimeter- and Submillimeter-Wave Spectrometers Based on the Direct Digital Synthesizers
Two new fast scan spectrometers based on direct digital synthesizer frequency synthesis are presented. The spectrometers provide fast, to 100 GHz/hr, acquisition of molecular spectra keeping high-precision measurements of transition frequencies: for an isolated line, the error does not exceed ±0.002...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | rus |
| Published: |
Видавничий дім «Академперіодика»
2012
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| Online Access: | http://rpra-journal.org.ua/index.php/ra/article/view/437 |
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| Summary: | Two new fast scan spectrometers based on direct digital synthesizer frequency synthesis are presented. The spectrometers provide fast, to 100 GHz/hr, acquisition of molecular spectra keeping high-precision measurements of transition frequencies: for an isolated line, the error does not exceed ±0.002 MHz (provided that signal-tonoise ratio is more than 50). Source frequency modulation is also provided by means of direct digital synthesizers that allows to assure high stability and definiteness of parameters of frequency-modulated signal and minimize lineshape distortion of the spectral lines. |
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