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The RU-9603 MIC (Microwave Integrated Circuit) Assembly is the high-sensitivity receiver front-end for the Furuno FAR-2827 25kW X-band radar. Its primary function is to capture weak 9GHz microwave echoes returning to the antenna and convert them into a 60MHz Intermediate Frequency (IF) signal that the radar processor can interpret. It integrates a Low Noise Amplifier (LNA) to boost faint signals, a Local Oscillator/Mixer for frequency down-conversion, and a Diode Limiter to protect the delicate internal circuitry from being destroyed by the magnetron’s massive 25kW outgoing pulses. Essentially, it acts as the “ears” of the radar, determining the system’s overall sensitivity and ability to detect small targets at long distances.
| Specification | Parameter |
| Manufacturer Part Number | 000-147-156-14 |
| Compatible Radars | Furuno FAR-2127, FAR-2827 (25kW X-Band Series) |
| Transceiver Unit | RTR-079 / RTR-079A (Mounted in RSB-096 Gearbox) |
| RF Input Frequency | $9410 \text{ MHz} \pm 30 \text{ MHz}$ |
| IF Output Frequency | $60 \text{ MHz}$ |
| Noise Figure | $\leq 4.0 \text{ dB}$ (Typical) |
| Receiver Gain | Variable via IF Board 03P9355 (Approx. 90-100 dB total system gain) |
| Input Interface | WR-90 Waveguide Flange |
| Supply Voltage | $+12 \text{V DC}$ (Vcc) and $+5 \text{V DC}$ (Reference) |
| Tuning Control Voltage | $2.0 \text{V}$ to $12.0 \text{V DC}$ (Analog “TUNE” signal) |
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