John M Harrell

US Patent:

42543274, Mar 3, 1981

Filed:

May 17, 1979

Appl. No.:

6/040014

Inventors:

Lawrence A. Beno - Camarillo CA
John T. Harrell - Newbury Park CA
Albert B. Evans - Ventura CA
Jay R. Gaudig - Camarillo CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H03K 2136

US Classification:

235 92CC

Abstract:

Apparatus for generating pulses having selectable pulse width and selecta pulse repetition interval which may be used as a pulse repetition interval generator in a radar signal simulator. Each pulse is initiated by a clocked counter when it reaches a predetermined count from a preselected initial count. The initial count is determined by data stored in a read-only-memory which is selectably loaded into the counter to provide a variable initial count. Another clocked counter which is enabled by the leading edge of the pulse then terminates the pulse when it reaches a predetermined count from a preselected initial count.

US Patent:

41632346, Jul 31, 1979

Filed:

Feb 7, 1978

Appl. No.:

5/875831

Inventors:

Lawrence A. Beno - Camarillo CA
John T. Harrell - Newbury Park CA
Albert B. Evans - Ventura CA
Jay R. Gaudig - Camarillo CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 740

US Classification:

343 177

Abstract:

A device for generating simulated antenna scan patterns of conventional sch radar antennas comprising an antenna scan generator for providing a low frequency a-c signal and a pulse repetition interval generator with stagger circuit for providing a pulse repetition interval signal. An RF carrier signal modulated by the pulse repetition interval signal is amplitude modulated by the low frequency a-c signal for generating the simulated antenna scan pattern.