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Quarterly Progress Report Number 3, 1 July-30 September 1968.

Author: TEXAS UNIV AT AUSTIN DEFENSE RESEARCH LAB.
Publisher: Ft. Belvoir Defense Technical Information Center 05 NOV 1968.
Edition/Format:   Print book : English
Database:WorldCat
Summary:
Defense Research Laboratory (DRL) personnel assisted in calibrating the receiving portion of the sonar system. Repeating the installation checkout required many calibration adjustments, the most troublesome of which was the correction of tape path alignment errors on the PME. Standard acoustic measurements were made on the system transmitter and receiver. Audio scanner receive sensitivity of -17 dB re 1 microbar was  Read more...
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Document Type: Book
All Authors / Contributors: TEXAS UNIV AT AUSTIN DEFENSE RESEARCH LAB.
OCLC Number: 227409251
Description: 24 pages

Abstract:

Defense Research Laboratory (DRL) personnel assisted in calibrating the receiving portion of the sonar system. Repeating the installation checkout required many calibration adjustments, the most troublesome of which was the correction of tape path alignment errors on the PME. Standard acoustic measurements were made on the system transmitter and receiver. Audio scanner receive sensitivity of -17 dB re 1 microbar was measured, with side lobe suppression a relatively poor 13 dB. The receive bandwidth was modified for the testing project; the measured response is shown on Fig. 1. A few individual stave measurements were performed with the results shown on Figs. 2 and 3. Figure 2 shows the receiving response of stave 1, and Fig. 3 shows a comparison of the acoustic signal response of several transducers staves. The staves were connected to the preamplifiers during these measurements.

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Primary Entity

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   schema:description "Defense Research Laboratory (DRL) personnel assisted in calibrating the receiving portion of the sonar system. Repeating the installation checkout required many calibration adjustments, the most troublesome of which was the correction of tape path alignment errors on the PME. Standard acoustic measurements were made on the system transmitter and receiver. Audio scanner receive sensitivity of -17 dB re 1 microbar was measured, with side lobe suppression a relatively poor 13 dB. The receive bandwidth was modified for the testing project; the measured response is shown on Fig. 1. A few individual stave measurements were performed with the results shown on Figs. 2 and 3. Figure 2 shows the receiving response of stave 1, and Fig. 3 shows a comparison of the acoustic signal response of several transducers staves. The staves were connected to the preamplifiers during these measurements."@en ;
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