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Sperry, 65801805-4 BEARING BOARD ASSY

$360.00Earn 360 points!

1 in stock

Electronic PCB that processes bearing and potentially phase/heading pulse signals from the radar scanner drive / encoder assembly for the radar turning unit. Bearing Board PCB is a dedicated radar turning unit printed circuit board inside marine radar scanners (X-Band). It interfaces with pulse/optical sensors to monitor scanner rotational bearing, provides signals to the radar control electronics, and includes configuration via jumpers for different scanner speeds.

Technical Specification

⚙️ Typical Functionality & Role

  • Bearing/Heading Pulse Processing: The board reads pulse signals generated by a pulse disc (encoder) on the rotating radar scanner and provides processed signals used for speed/bearing tracking within the radar’s control circuitry.

  • Opto-coupler Interface: Opto-couplers mounted on the rear of the board detect the pulse disc’s markings during rotation.

  • Link/Jumper Configuration: The board includes a jumper/link (LK1) that adjusts the tracking characteristics of the phase-locked circuitry, depending on scanner rotation speed (e.g., configured for LOW vs HIGH RPM settings).

    • Example: Jumper in pins 1 & 2 for ~28 RPM (LOW), pins 2 & 3 for ~45 RPM (HIGH).

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