Axis-Crossing Generator (ACG),
NAVAL UNDERSEA WARFARE CENTER SAN DIEGO CA
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A Digital Axis-Crossing Interval Measurement System DACIM is being developed to measure zero axis crossing intervals and positive peak amplitude of signals between 0 and 25 KCPS. The digitized interval and amplitude information will be recorded on magnetic tape for subsequent analysis. To check the performance of DACIM it is necessary to have available some representative sonar signals which have very accurately known axis crossing times. These signals are obtained by generating an axis-crossing ramp of predetermined slope from a fast risetime step. This memorandum describes a device which generates such a ramp.
- Acoustic Detection and Detectors