Combined scan and track antennas are disclosed, each comprising a reflector and a feed thereto in which the track reflector and its feed and the feed to the scan reflector are all fixed with respect to each other and the scan reflector rolls in such a manner that a line through the center of the spherical feed antenna and the fixed feed point therefor always is perpendicular to a point on the surface of the spherical reflector through which it extends.

In the disclosed system, the storage screen of a scan converter or a recording storage tube is divided into a plurality of image areas such as four quadrants, for example. In each of these quadrants, there are written on the screen respective different images which are destined for four terminals. The storage screen is then read by having the reading beam therein sweep the total width of the storage screen in a raster scan. A spatial multiplexing arrangement is provided to transmit to each of th...

A method of performing in-circuit testing of interior points of circuit boards containing both boundary-scan and non-scan components that utilizes the boundary-scan facility. The testing procedure involves isolation of the non-scan components and either driving or sensing voltages at physically accessible test sites. The method permits use of isolation and multiplexing solutions that are ordinarily developed for in-circuit testing of board components, resulting in efficient design and implementa...

In a digital scan converter for displaying video data provided by a radar sensor on a raster scan display, the video data is stored in a radar input buffer at addresses corresponding to the pattern according to which the field of view of the radar sensor is scanned, and taken over in a random-access memory. The random-access memory consists of N .times. N submemories, all containing a .times. a memory elements and all being simultaneously accessible. For the range scan in any azimuth value (.phi...

Two sources, each producing divergent beams of radiation, are translated in orthogonal directions. The divergent beams are each scanned through the object being studied. The sum of the angular extent of each of the divergent beams is approximately 180.degree. so that the detected radiation transmitted through the object provides all of the information required to produce a cross-sectional image of the object. An advantage in the use of the orthogonal scans of the present invention is that faster...

A write electron gun is disposed at one end of a vacuum envelope to produce an electron beam modulated by an external input signal having signal elements occurring at a first given rate. A self-scanned array is disposed at the other end of the envelope. An electron beam deflection system is disposed in the envelope between the electron gun and the array to scan the electron beam over the array to store the signal elements in the array with the array providing electron gain for the stored signal ...

A digital scan converter for use with a mobile (eg airborne) radar or other surveillance apparatus, having ground-stabilized storage allocations and apparatus-stabilized display, provisions for polar to cartesian coordinate transformation and scan to scan integration, and having a random-access store in which each store location is arranged to hold the digital data for a plurality of spots on the display.

A spectrophotometer capable of rapid spectral scanning is achieved by mounting a low inertia reflective grating directly on the output shaft of a galvanometer type optical scanner, and sweeping the dispersed beam reflected from the grating across a spherical mirror and after reflection therefrom across a beam exit slit. Rapid wavelength switching for a laser spectrometer is also described.

In a radio having power tuning apparatus activated by a latching switch in a sweep position and deactivated by the latching switch in a stop position, the radio further having apparatus responsive to a received radio frequency signal for switching the latching switch to its stop position, first apparatus is provided for switching the latching switch to its sweep position, second apparatus is provided for manually disabling the first apparatus, third apparatus is provided for activation of the fi...

A standard television picture is transmitted over conventional phone lines by sampling and storing one picture element per TV line, and transmitting the information of the stored samples over the phone line as a reduced bandwidth television signal. At the receiver end the transmitted signal is placed into storage and extracted at standard TV rates and written as a TV line onto a rotating video disc. The process is repeated until the final picture to be displayed is assembled on a line-by-line ba...