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Established in 1915, the company has produced a wide variety of products including marine electronics, measuring equipment for telecommunication, radio broadcasting equipment, and amateur radio equipment, including the JST-145dx/JST-245dx HF transceivers, which were the last amateur radio transceivers produced by JRC, ending in 2002.
OPS-28 is a Pulse-Doppler radar manufactured by Japan Radio. It is installed as a low-altitude warning / anti-water search radar mainly on the Maritime Self-Defense Force 's escort ship. [ 1 ] Variations include OPS-28-1 , OPS-28B , OPS-28C , OPS-28D , OPS-28E and OPS-28F .
The jammer does not know if their jamming is effective before operator starts changing radar transmission settings. Using EW countermeasures will give away radar capabilities thus on peacetime operations most military radars are used on fixed frequencies, at minimal power levels and with blocked Tx sectors toward possible listeners (country ...
Marine radar has performance adjustment controls for brightness and contrast, also manual or automatic adjustment of gain, tuning, sea clutter and rain clutter suppression, and interference reduction. Other common controls consist of range scale, bearing cursor, fix/variable range marker (VRM) or bearing/distance cursor (EBL).
In the radar receiver, the returning echoes are typically received by the antenna, amplified, down-converted to an intermediate frequency, and then passed through detector circuitry that extracts the envelope of the signal, known as the video signal. This video signal is proportional to the power of the received echo.
The Mark 92 system assigns targets via the ship's air search radar, and surface search radar or from the Mark 92's own search radar capabilities. [1] The system has two or three radar sub-systems depending on the model. The first two are combined into a single system called the Combined Antenna System or CAS is used in all models.
NNIDAR has in recent years expanded their product range to include innovative radar designs like the Podsolnukh-E over-the-horizon (OTH) surface-wave radar [4] and the 29B6 Konteyner. [5] The latter, while also being an OTH-radar, has separate locations for the transmitter and the receiver making it a bi-static system.
Although creating that radar was a more straightforward task based on already-known techniques, that work did demand the achievement of signal linearity and frequency stability that were at the extreme state of the art. An adequate instrument was designed and built by the Radar Laboratory and was installed in a C-46 (Curtiss Commando) aircraft ...