The new 4.4 MHz master oscillator for the 60 MHz wideband carrier system
Abstract
A master oscillator with crystal oven was developed for the V10800 carrier system. It features good short-term and long-term frequency stability. The long-term drift over a period of three months is less than 1 x 10 to the -8th power and the drift expected over a period of 15 years, due to aging is less than 3 x 10 to the -7th power. The use of a high-quality 3rd overtone quartz crystal with an output of 4.400000 MHz and housed in an all-glass container, together with the design concepts for oscillators and crystal ovens made possible a considerable reduction in oven volume, as compared to previous designs, while achieving high frequency stability at the same time. It was possible to develop a single crystal oven whose performance is comparable to that of conventional twin ovens. The oscillator and crystal-oven circuitry and the relevant details on the mechanical and aging test carried out with a large number of laboratory samples and the high resetting accuracy obtained after a 24 hour power supply failure also make the oscillator suitable for a secondary frequency standard.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- September 1975
- Bibcode:
- 1975STIN...7613326K
- Keywords:
-
- Crystal Oscillators;
- Frequency Stability;
- Wideband Communication;
- Aging (Materials);
- Design Analysis;
- Drift Rate;
- Performance Prediction;
- Quartz Crystals;
- Communications and Radar