Products |
The AN/SPA-25G and the AN/SPA-25G EC7 are actually two different display systems which can be used for similar mission requirements. The AN/SPA-25G EC7 is also known as the AN/SPA-50G. Both nomenclatures are used interchangeably. The AN/SPA-25G EC7 nomenclature is used on this web page. The primary differences with EC 7 are as follows:
1. Upgraded microprocessor from the 68000 to the 68020.
2. An additional printed circuit board with another 68020 which
can accept application specific software.
3. Keyboard for control with the resultant rearrangement of manual
controls
4. New motherboard, and wiring Harness
FEATURES
Target Corporation has developed a unique state-of-the-art display console for decision makers on naval vessels. This command and control console provides radar video signals, correlated track symbols from multiple sources, prerecorded maps of coastlines and other geographic features to permit the decision maker to communicate required actions to weapon systems'officers and other plafforms. The console's versatility and flexibility pemmit comprehensive battle management in such missions as:
Anti-Air Warfare (AAW)
Tracking and Navigation
Air Intercept
Anti-Submarine Warfare (ASW)
Anti-Surface Warfare (ASUW)
Amphibious Warfare (AMW)
Fire Control
The AN/SPA-25G EC-7 is a 1125-lines-per-frame, 40 frames per second
(80 fields per second, 2 to 1 interlaced) raster scan display
presented on a rectangular CRT. A P-43 aluminized CRT phosphor
screen enables the AN/SPA-25G EC-7 to provide radar surveillance
information in either a darkened or full daylight environment.
Digital architecture, based on the 68020 family of microprocessors, accepts various sensor data inputs and continually processes them through 6 megabits of digital memory. By correlating the data with the internally generated graphics, a fully interactive display is presented to the operator.
Some of the more significant functional characteristics include the following:
RADAR SIGNAL PROCESSING
The processor accepts and automatically synchronizes radar
signals from conventional radar sets operating at PRF rates of
100 to 3600 pulses per second, and antenna speeds of zero to 60
RPM in either direction, and control signals in digital format,
such as the Navy RADDS 64-bit data stream format. Radar video
signals as short as 50 nano-seconds are accepted.
The self-contained scan converter translates the radar signal
positional data from rho-theta (or data word) to x-y format, digitizes
the video and stores it in three 1024-by-1024 memory planes, preserving
a gray scale level of eight shades. The processor also generates
additional sweeps to prevent holes in the radar picture due to
insufficient radar triggers.
Because the radar data is stored in digital memory, it will remain indefinitely unless deliberately erased. Front panel controls allow the operator to set the radar signal storage to any duration between zero and infinity, thus optimizing the presentation of target history.
Functionally, the AN/SPA-25 EC-7 supports a distributed architecture system concept by being capable of operating as an autonomous radar signal processor with no need to interface with an external computer. The executive controller is a 32-bit 68020 microprocessor aided by a 68881 floating point coprocessor, all supported by onboard RAM and ROM. The design is expandable to support unique mission requirements. With the optional battery backup, data stored in memory is retained for about 10 minutes in the event of power failure.
DISPLAY FORMAT
The display for the SPA-25G EC-7 is a 1280 horizontal by 1024 vertical pixel format raster scan. The central 1024 x 1024 elements are dedicated to radar data, while the additional memory elements are utilized for tabular data presented outside the radar circle. The data presented consists of menus track file data blocks, display and system status information.
An optical contrast enhancement filter permits the display of 8 luminous shades in a daylight environment.
FUNCTIONAL FLEXIBILITY
With an intemal structure based on the VME and VSB Bus, this tactical display has been designed with "Pre-Planned Product Improvement" in mind. Functions such as Radar Integration, IFF processing, Embedded Training, Special Purpose Processing and additional memory are all available as options.
DEMONSTRATED RELIABILITY
Being completely solid state (except CRT) and totally modular in construction, the SPA-25G EC-7 supports a demonstrated MTBF of greater than 3000 hours and a MTTR of less than 30 minutes.
FUNCTIONAL PERFORMANCE
Utilizing front panel and operator shelf-mounted function switches and stiff-stick, the operator can interact with the display to perform the following typical functions.
ELECTRONIC PLOTTING
The SPA-25G EC-7 electronically stores tracks, plots, and labels in memory. The system automatically calculates range, bearing, speed, and CPA of the targets and displays the data in a track file data block on the CRT. In addition, this information is automatically made available on the data bus network. All of the displayed plot information maintains proper perspective through any range scale change.
Offset capability of up to 5 radii in any direction, coupled with continuously variable range control, gives the operator the ability to "magnify" distant targets for clarification. This offset can be initiated by operator input, using either external or intemally derived data.
The bearing circle automatically varies the scale and perspective with respect to the radar center to be proportional to the selected offset, thus providing non-ambiguous target bearing information to the operator. The graphics capabilities listed below permit of a synthetic display representation of traffic lanes, harbors, marshalling areas, restricted zones, etc.
TYPE . . . . . . . . . . . . . . . . . . . . . MAX. NUMBER
1. PLOTS . . . . . . . . . . . . . . . . . . . . . . 200
2. TRAILS . . . . . . . . . . . . . . . . . . . . 1,600
3. LINES . . . . . . . . . . . . . . . . . . . . . . 144
4. MAP LINES . . . . . . . . . . . . . . . . . 4,096
5. CIRCLES . . . . . . . . . . . . . . . . . . . . 10
6. ARCS . . . . . . . . . . . . . . . . . . . . . . . 10
7. APPLICATIONS SECTORS . . . . . .5
8. ELLIPSES . . . . . . . . . . . . . . . . . . . 200
9. CPAs . . . . . . . . . . . . . . . . . . . . . . . 200
10. BEARING LINES . . . . . . . . . . . . 10
11. TEXT
AIR INTERCEPT
When selected by the operator, this functional mode automatically provides the operator with a specialized display for an air intercept procedure. When interceptor and target video is plotted and labeled, AIC mode processing calculates the intercept solution and provides the appropriate display for Near Collision Intercept and Forward Quarter Intercept.
EMBEDDED TRAINING (OPTIONAL)
A test target generator, resident within the display and controlled by operator selected software, can be employed to facilitate crew training during non-operational periods. Various levels of proficiency and automatic scoring can be provided.
BUILT-IN-TEST
To ensure a high degree of operational functionality, the SPA-25G EC-7 performs a continuous on-line BIT procedure. Any internal malfunction's location is available, by key action, on the CRT to the operator.
Although each module has a fault indicator, manually selected BIT test patterns are provided to aid maintenance personnel.
DISPLAY VIDEO INPUT/OUTPUT
The TV format display video is provided as an output for viewing on a compatible high definition monitor, or it can be used as an input to any other SPA-25G EC-7 display.
DISPLAY PERFORMANCE
RADAR INPUT SIGNALS
FORMAT OF RADAR SIGNALS
RADAR VIDEO DISPLAY
RADAR DIGITAL SCAN CONVERTER
MICROPROCESSOR/GRAPHICS/MEMORY
GRAPHICS GENERATOR
FRONT PANEL AND OPERATOR PANEL
OUTPUTS FROM DISPLAY
ELECTRICAL
COOLING
ENVIRONMENTAL
PHYSICAL CHARACTERISTICS DIMENSIONS (Sit-down)
WEIGHT
RELIABILITY
MAINTAINABILITY
