A Phase Comparison Cross-Modulation Test Instrument

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 82, No. 11, pp. 920–923
Abstract: While the methods for measuring and controlling cross-modulation distortion have been practiced for many years, the costs of these tests preclude their use as frequently as one would desire for best quality control. This paper describes a new test instrument that permits the laboratory to exercise control for each individual printer and for each print. The instrument requires only an inch (2 ½ cm) of film rather than the several hundred feet (hundred or more meters) of film normally required for such a test. A special and unique feature of the instrument is the phase comparison test which indicates to the operator the direction and magnitude by which the print density should be changed for minimum distortion (i.e. the amount of increase or decrease in density required). In addition, the instrument provides a direct measure of the level of distortion that is present, and also an indication of printer performance (e.g. slippage contact, etc.). Since the test is obtained by simply inserting the test section into the instrument aperture, only a few seconds are required to make the analysis. All of the presently used cross-modulation tone-pairs are accepted by the instrument.
Publication Date: 1973-11-01
DOI: 10.5594/J07661
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J07661
Author(s): Petro VlahosThe Motion Picture & Television Research Center, Assn of Motion Picture & Television Producers Inc., 8480 Beverly Blvd., Hollywood, CA 90048
Copyright: © 1973 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

The ABC of Photographic Sound Recording [Active]
Zero-Shift Test for Determining Optimum Density in Variable-Width Sound Recording [Active]
Modulated high-frequency recording as a means of determining conditions for optimal processing [Active]
1. General references to cross-modulation testing:. EXTERNAL
2. USA Standard PH22.51–1961 , Intermodulation Tests for 16mm Variable-Density Photographic Sound Prints , Jour. SMPTE , 70 : 536 , July 1961 . EXTERNAL
3. Instructions for Quality Control of Variable-Area Sound/racks , IB-24417, RCA Corp. EXTERNAL
4. Orlich H. , “The ‘thunder effect’ — a problem of the sound film,” Brit. Kinemat. Sound and TV , 55 : 48 – 50 , Feb. 1973 . Reprinted on the following pages of this issue of the Journal. EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J07661.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

Petro Vlahos; A Phase Comparison Cross-Modulation Test Instrument, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973. Available at https://doi.org/10.5594/J07661

Snippet:

Petro Vlahos; A Phase Comparison Cross-Modulation Test Instrument, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973. Available at https://doi.org/10.5594/J07661

HTML (ISO 690 compliant)

Preview:

Petro Vlahos; A Phase Comparison Cross-Modulation Test Instrument, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973. Available at https://doi.org/10.5594/J07661

Snippet:

<span class="citation">Petro Vlahos; <cite>A Phase Comparison Cross-Modulation Test Instrument</cite>, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973. Available at <a href="https://doi.org/10.5594/J07661" target="_blank" rel="noopener">https://doi.org/10.5594/J07661</a></span>

SMPTE's HTML Pub

Preview:

Petro Vlahos; A Phase Comparison Cross-Modulation Test Instrument, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973
doi: 10.5594/J07661
url: https://doi.org/10.5594/J07661

Snippet:

<li>
Petro Vlahos; <cite id="bib-10-5594-j07661">A Phase Comparison Cross-Modulation Test Instrument</cite>, Journal of the SMPTE ( Volume: 82, Issue: 11, November 1973); SMPTE, 1973
<span class="doi">10.5594/J07661</span>
</li>

Referenced By

Progress Committee Report for 1973 [Active]