Model 1250 Radar Target Simulator

Eastern OptX Model 1250 Radar Target Simulator is a digital propagation path replicator. It can produce a moving target with appropriate target cross-section, propagation loss, with a dynamic range of over 70 dB. The 1250 operates with pulsed, frequency hopping, or CW radars and with any encryption or modulation scheme. A high speed, user defined scenario may be triggered from the detected radar pulse or a user supplied external pulse. The 1250 will provide coherent operation with user supplied LO.
Rather than generating synthetic targets or signals, the system processes the user’s actual radar pulse and applies the critical parameters encountered in real operational environments. These include precise time delay to emulate target distance, path loss associated with signal propagation, Doppler frequency shifts corresponding to target velocities up to 5,000 mph, and radar cross-section effects that accurately model target size and reflectivity.

The Model 1250 is able to define and execute complex target scenarios through an intuitive interface, specifying parameters such as range, velocity, and target signature. Each scenario includes a preamble with radar-specific characteristics – such as pulse width and repetition rate – allowing the system to seamlessly synchronize state changes between pulses without detection by the radar under test. The simulator supports both automatic triggering via detected radar pulses and external trigger inputs, while continuously monitoring and recording signal activity throughout the test. Integrated analysis capabilities, including a full-bandwidth spectrum analyzer and comprehensive data logging, provide immediate insight into both system performance and scenario execution. With built-in self-test routines, optional NIST-traceable calibration, and detailed post-test comparison tools, the platform ensures confidence in both the simulator’s accuracy and the radar system’s operational readiness.

System Features
• Propagation loss replication
• I/O Antenna Gain Input
• Longitude, Latitude, and Altitude Target Input Option
• Interferer Injection (Jammer)
• Moving Target Scenario Generator
• Programmable (SCPI Commands)
• Bandwidth (limited by A/D, ~ 1 GHz)
• Microsecond switching speed
• Multipath (Clutter)
• Interferer Generator/Injector
• Radar Cross-Section Input
• Multiple Target Output
• Input/Output Signal Measurement and Displays

System Options
• Multipath (Clutter)
• Interferer Generator/Injector
• Radar Cross-Section Input
• Multiple Target Output
• Input/Output Signal Measurement and Display
• Input/Output Antenna Probess

The block diagram below shows a typical 1250 System used with a common antenna radar system. The 1250 receives the signal transmitted from the radar, provides the necessary target delay, propagation loss, and Doppler, and then transmits back to the radar receiver. 60 dB of Input to Output Isolation is typical for most applications. Single antenna systems with octave band isolators are also available for specific radar bands. Direct RF connection to Radar and 1250 without external antenna is permissible and common. The system operates with single antenna or phased array systems. Optional multiple target generation is available with single or multiple output emissions.

Typical System Performance
• 100 ft to 1,500 nautical mile (nM) target distance
• Switching speed 1 us
• Dynamic range: ~ 70 dB ( 12 bit)
• Instantaneous BW: up to 2 GHz
• Latent delay: 140 ns
• Frequency Range: 0.1 to 18 GHz
• Options Available