SMPTE Recommended Practice Frequency Response and Operating Level of Recorders and Reproducers for Audio 2 Record for 2-in Quadruplex Video Magnetic Tape Operating at 15 and 75 in/s

Normal rabbit electrocardiograms were taken using high sensitivity, recording speed, and frequency response. The signals were recorded on magnetic tape and replayed with a time expansion of 32 to 1. Bipolar and augmented unipolar limb leads and two unipolar chest leads were recorded. Mean values, ranges, and standard deviations for the P, QRS, and T voltages were obtained, as well as mean frontal plane vectors. Similar data for durations were found. The ranges of mean axes were 44° to 86° for P, 55° to 103° for T, and –79° to +156° for QRS. The wide range in ventricular electrical axis may be due to changes in heart position. Notching of P and QRS complexes was due to the high resolution used.

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SMPTE Standard for Television Analog Recording — Frequency Response and Operating Level of Recorders and Reproducers — Audio 1 Record on 2-in Tape Operating at 15 and 7.5 in/S.

SMPTE Journal ◽

10.5594/j02219 ◽

1992 ◽

Vol 101 (10) ◽

pp. 737-744

Keyword(s):

Frequency Response ◽

Operating Level

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Demonstration of the Use of Tape-Recorded Information from a High Vacuum Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100063007 ◽

1969 ◽

Vol 27 ◽

pp. 218-219

Author(s):

Richard E. Hartman ◽

Roberta S. Hartman ◽

Peter L. Ramos

Keyword(s):

Information Retrieval ◽

Electron Microscope ◽

Magnetic Tape ◽

High Vacuum ◽

Data Retrieval ◽

Electronic Information ◽

Electronic Data ◽

Subsequent Processing ◽

Continuous Record

We have long felt that some form of electronic information retrieval would be more desirable than conventional photographic methods in a high vacuum electron microscope for various reasons. The most obvious of these is the fact that with electronic data retrieval the major source of gas load is removed from the instrument. An equally important reason is that if any subsequent analysis of the data is to be made, a continuous record on magnetic tape gives a much larger quantity of data and gives it in a form far more satisfactory for subsequent processing.

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