Time Domain Metrology Study.
Final technical rept. on Phase 1, Jun 71-Jun 72,
SPERRY RAND RESEARCH CENTER SUDBURY MASS
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The report describes work done during the second half of a 12 month investigation of the capabilities of time domain metrology in an automatic calibration system. Sources of measurement error are isolated and evaluated through experiments. The most serious source, long term random error due to slight generator instability, is reduced by a circuit modification. Sebsequent insertion loss measurements on wideband coaxial attenuators show excellent agreement between time domain results and frequency calibration values over the range 0.4 to 8 GHz. Measurement results are also included for waveguide components and crystal detectors. Pulse generator development work on higher voltage solid state diodes and optimum pulse width determination are discussed. Descriptions are given of a new pulse generator with 8 V amplitude and 60 ps, -6 dB width, and a 2.5 ns time domain standard built for the U. S. Government. Recommendations for future work to improve and extend the frequency range of the present system are suggested.
- Test Facilities, Equipment and Methods