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The NRG-229 is typically housed within the scanner unit of the JMA-9132-SA and the newer JMR-9200/7200 series S-Band radars.
Function: It serves as the “ears” of the radar, capturing weak microwave echoes reflected from targets and converting them into digital signals for the bridge processor.
S-Band Advantage: Operating at a lower frequency (approx. 3 GHz), this receiver is less susceptible to “clutter” from sea spray and rain, making it essential for ocean-going vessels over 3,000 GT.
Design: It is a compact, shielded module designed to withstand the high-vibration and high-interference environment of the radar mast.
| Feature | Specification |
| Model Number | NRG-229 |
| Radar Band | S-Band (Approx. 3050 MHz) |
| Compatibility | JRC JMA-9132, JMR-9200, JMR-7200 Series |
| Scanner Units | NKE-1130, NKE-1139, NKE-1632 |
| Intermediate Freq (IF) | Typically 60 MHz or 40 MHz (System dependent) |
| Dimensions | Approx. 32cm (L) x 21cm (W) x 10cm (H) |
| Weight | Approx. 1.8 kg |
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