| タイトル | A modular multiple use system for precise time and frequency measurement and distribution |
| 本文（外部サイト） | http://hdl.handle.net/2060/19790016571 |
| 著者（英） | Lee, G. M.; Bush, R. L.; Adams, W. S.; Reinhardt, V. S. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1978-11-01 |
| 言語 | eng |
| 内容記述 | A modular CAMAC based system is described which was developed to meet a variety of precise time and frequency measurement and distribution needs. The system was based on a generalization of the dual mixer concept. By using a 16 channel 100 ns event clock, the system can intercompare the phase of 16 frequency standards with subpicosecond resolution. The system has a noise floor of 26 fs and a long term stability on the order of 1 ps or better. The system also used a digitally controlled crystal oscillator in a control loop to provide an offsettable 5 MHz output with subpicosecond phase tracking capability. A detailed description of the system is given including theory of operation and performance. A method to improve the performance of the dual mixer technique is discussed when phase balancing of the two input ports cannot be accomplished. |
| NASA分類 | PHYSICS (GENERAL) |
| レポートNO | 79N24742 |
| 権利 | No Copyright |
