Precision Systems For Critical Applications COMSTRON FEATURES * Frequency Agile Radar * ECM capability * Radar Upgrade * Enhance clutter rejection * MTI Enhancement CS-6000 FAST SET-ON LOCAL OSCILLATOR DESCRIPTION The CS-6000 series of Fast Set-On Local Oscillators (FSLO) were designed as fast tracking local oscillators (FTLO) to retrofit existing magnetron-based frequency agile radars. Most magnetron based frequency agile radars use either spin-tuned, step-tuned or sweeptuned magnetrons to achieve frequency agility. These frequency agile magnetrons are programmed to fire at random intervals to provide a random frequency carrier for each transmitted pulses. When the transmitter is set in the frequency agile mode, the radar receiver must accurately tune to each new frequency for the duration of the radar listening time to receive the return echos. Therefore the receiver local oscillator must be able to track the new frequency in less than 1 microsecond, and must also meet performance criteria of good set-on accuracy, low phase noise and low spurious output. The CS-6910 FSLO was designed to replace both a Backward Wave Oscillator (BWO) (in frequency agile mode) and a Reflex Klystron ( in MTI mode) for the MK-92 fire control radar. The BWO/Klystron design requires time consuming and tedious alignment procedures that have been known as the Achilles Heels of the MK-92 fire control system. CS-6910 is a simple replacement for the BWO/Klystron combination that is self calibrating at the unit level as well as the system level. CS-6910 was successfully tested in sea trails during the first two months of 1993, and is now being fitted to a large number of Perry Class Frigates to improve MK-92's reliability and readiness. The CS-6910 requires only a sample of the magnetron's RF output, an AC power source, and a mode command input. All other system level related functions are self contained within the CS-6910. The CS-6000 FSLO series provide the "enabling technology" to inexpensively upgrade the large numbers of existing magnetron-based radars, enabling these radars to gain anti-jam capability with excellent target visibility in a high clutter environment. A typical upgrade consists of a frequency agile coaxial magnetron, which uses a linear movement bellows for high MTBF (16,000 Hours), a CS-6000 series FSLO, and companion MTI signal processing software to make full utilization of the MTI characteristics. This combination of capabilities can rejuvenate older generation radars and enable them to remain competitive in the evolving battle scene. As a baseline comparison, a coaxial magnetron with FSLO will provide about 8 to 10 dB better clutter rejection over older spin tuned magnetron radars, and this performance is vastly superior than fixed frequency magnetron radars . CS-6000 CS-6000 Table 1: Technical Specification CS-6910 CS-6000 Series Input Frequency Range: Standard: 8900 - 9600 MHz Option: 2 - 18 GHz, 1 GHz Bandwidth Output Frequency Range: Standard: 8870 - 9570 MHz Option: 2 - 18 GHz, 1 GHz Bandwidth Tracking Offset: Standard: 30 MHz Option: 60 MHz or Programmable Frequency Increment: Standard: 50 KHz Option: 5 KHz Spurious: Standard: -80 dBc Option: -85 dBc 100 Hz -74 dBc/Hz -74 dBc/Hz 1 KHz -89 dBc/Hz -89 dBc/Hz 10 KHz -111 dBc/Hz -111 dBc/Hz 100 KHz -116 dBc/Hz -116 dBc/Hz Option: 750 nsec max Output Phase Noise: Tracking Time: 750 nsec Typ., 1.0 usec Max. Tracking Accuracy: +/- 75 KHz RMS, +/- 250 KHz Max. Output Level: +17 dBm Min. Harmonics: -35 dBc Operating mode: STIR, CAS, Long Pulse or Short Pulse Automatic mode recognition through pulse width measurement. Frequency Agile Mode: Frequency Agile (FA) to Fixed Frequency (FF) Fixed Frequency (FF) to Frequency Agile (FA) Switching Time One PRT (FF/FA or FA/FF) BIT (Built-In-Test): On-line - Continuous Background Calibration Off-line - Full Function Test with Error Code MTBF: 15,000 Hours, Naval Sheltered Power supply 400 Hz, Single Phase, 250 Watts Weight & Dimension: 60 Lb, 36" X 9.0" X 7.0" Environmental Conditions: Operating Temp: 0 C to +50 C, per MIL-F-18870 Storage Temp: -55 C to +70 C ESS: per WS32883 (Weapon Specification) Manufacturing Screening: NAVMAT P-9492 EMI/EMC: MIL-STD-461C & MIL-STD-462 Vibration: MIL-STD-167, Type 1 Shock: MIL-STD-202F, Method 213B Airborne Noise: MIL-STD-740, Grade C Precision Systems For Critical Applications 35 South Service Road Plainview, NY 11803 TEL: 516-694-6700 FAX: 516-694-6771 COMSTRON