No Sync Signal Jrc Radar ❲90% Confirmed❳

Work safely – radar contains high-voltage capacitors. De-energize and wait 5 minutes before opening units.

The Signal/Control (SigCon) cable between the scanner and display carries the sync. If moisture wicks into the BNC or N-type connectors, the impedance changes, attenuating the 1-5V sync pulse to 0V. no sync signal jrc radar

Borrow or buy a handheld oscilloscope (e.g., Fluke 123 or Hantek). Work safely – radar contains high-voltage capacitors

| 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. | | Step | Action | What to look