Scale changing and spectral analysis of analog chart records

Authors

• Eugene M. Wescott

Files

Description

Data which are contained only in the form of a trace on a strip chart record or on film often may not be fully utilized because of the time and difficulty required for conversion to other forms for analysis. A device is described herein for manually trace following chart records to produce an electrical analog signal. The output signal may be recorded on a strip chart to produce desired amplitude or time scale changes. Time variations of spectral content may be measured by recording the output on a slow speed tape recorder—then speeding up the playback for sonograph analysis. These techniques have been found useful for rapid and inexpensive analysis of analog chart records such as magnetograms.

Publication Date

12-17-1966

Keywords

Spectrum analysis

Recommended Citation

Wescott, Eugene M., "Scale changing and spectral analysis of analog chart records" (1966). GI Reports. 145.
https://ualaska.researchcommons.org/uaf_gi_reports/145

Handle

http://hdl.handle.net/11122/15501