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: Even if the motor rotates, a faulty encoder may fail to output the actual rotation (AZI) signal to the display. Wiring and Connectivity :
150m Ro-Ro cargo. Radar: JRC JMA-7322-6. Symptom: Intermittent "No Sync Signal" every 15 minutes, lasting 2 seconds—just enough to lose target tracking. no sync signal jrc radar
Key symptoms
: If the motor is turning but you still have no sync, the encoder—which tells the system the antenna's position—may be faulty. Power Supply Interruptions : Even if the motor rotates, a faulty
: Access the maintenance menu (often requires a password like '0' for service engineer mode) to check internal diagnostic statuses for TX/RX signals. Symptom: Intermittent "No Sync Signal" every 15 minutes,
| Step | Action | What to look for | |------|--------|------------------| | 1 | Is the antenna rotating? (Visually or via rotation indicator light) | If stopped → Motor/power issue, not just sync. | | 2 | Check radar mode: Transmit (TX) selected? | Some units show “NO SYNC” when in STBY or if magnetron heater is off. | | 3 | Cycle power (radar processor and scanner) | Temporary glitches in signal detection. | | 4 | Check heading source (Gyro/GNSS) if interfaced | Some JRC radars reject sync if heading data is invalid. |