What does the ‘Coarse Tune / Fine Tune Failure’ message indicate?
The ‘Coarse Tune / Fine Tune Failure’ message indicates that the Radar Processor is attempting to tune the Radar Transceiver and is not receiving the proper Readback Signals.
Sometimes this can have a simple resolution. The following conditions would result in these error messages:
- The Antenna Safety Switch is not closed or the Loopback Connector is not connected.
- The Front Panel Rocker Switches on the PCRP 2x1A / 2x2A Models are in the OFF position.
- The Radar Cable has been disconnected.
- The PCRP needs to perform an Auto-Tune Initialization from the ‘Tx/Rx’ Panel in the RDOP Maintenance Panel.
In advanced debugging, one would need to determine if the Tune Control is being sent from the PCRP or if the Radar Transceiver has actually failed. If the Magnetron is fairly old (>5,000 Hours of Operation) then it is possible a Magnetron replacement would resolve this issue.
Further information on debugging radar issues can be found in the Radar Fault Isolation Manuals, on the Download Manuals Webpage.
