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...
Збережено в:
| Видавець: | Видавничий дім «Академперіодика» |
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| Дата: | 2012 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | rus |
| Опубліковано: |
Видавничий дім «Академперіодика»
2012
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| Онлайн доступ: | http://rpra-journal.org.ua/index.php/ra/article/view/437 |
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Репозиторії
Radio physics and radio astronomy| Резюме: | 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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