NASA NTRS · 19820012636
Digital processing clock
Abstract
Tthe digital processing clock SG 1157/U is described. It is compatible with the PTTI world where it can be driven by an external cesium source. Built-in test equipment shows synchronization with cesium through 1 pulse per second. It is built to be expandable to accommodate future time-keeping needs of the Navy as well as any other time ordered functions. Examples of this expandibility are the inclusion of an unmodulated XR3 time code and the 2137 modulate time code (XR3 with 1 kHz carrier).
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Phillips, D. H.. 1982-03-01. Digital processing clock. https://ntrs.nasa.gov/citations/19820012636
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