NASA NTRS · 19800000316
Portable zero-delay assembly
Abstract
Instrument is calibrated using back-to-back method. In comparison standard, S-X isolators are opposite from device being tested to permit signal flow in reverse direction. After calibration portable zero-delay assembly (PZDA) is used to set time delays of deep-space network ground-station ranging systems. Approach is also used to calibrate microwave links in other communications systems.
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Franco, M. M., Otoshi, T. Y., Serhal, E. J., Jr.. 1981-01-01. Portable zero-delay assembly. https://ntrs.nasa.gov/citations/19800000316
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