| Abstract: | Tests of the standard NCER multiplex system recorded and played back on both the Bell and Howell 3700B (about 0.1% tape speed variation) and on the Sony TC-126 cassette recorder (about 1% tape speed variation) showed that subtractive compensation employing a reference frequency multiplexed on the data track was remarkably effective in reducing tape-speed-variation-induced noise 1 and, hence, in increasing the dynamic range of the record/playback system. Further tests suggested that the 0 to 30 Hz bandwidth of the standard system (8 data channels) might be increased substantially, at the ‘price‘ of reducing the number of data channels to 3 or 4, without serious loss of dynamic range if subtractive compensation could be implemented effectively with the broader-band system. |
| Genre: | USGS Numbered Series |
| ProdID: | 13462 |
| Citation Author: | Eaton, Jerry P. |
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| Citation Edition: | - |
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| Citation Language: | ENGLISH |
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| Citation No Pagination: | N |
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| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | ii, 18, [50] leaves :ill.; (71 p. - PGS) |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 76-87 |
| Citation Search Results Text: | Notes on a broad-band variant of the NCER seismic data multiplex system for use with field tape recorders; 1976; OFR; 76-87; Eaton, Jerry P. |
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| Citation Year: | 1976 |
| Type: | citation/reference |
| Text: | Notes on a broad-band variant of the NCER seismic data multiplex system for use with field tape recorders; 1976; OFR; 76-87; Eaton, Jerry P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/1976/0087/ |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
