Scanner Unit - Furuno 1622 Service Manual

2.3!Scanner Unit

2.3 Scanner Unit
The scanner unit features that;
1) The powers supply circuit for the scanner unit is provided on the SD board.
2) The SD board in the scanner unit communicates with the display unit.
3) Auto-gain and auto-STC circuits make operation easy.
The TX trigger from the display unit is modulated and oscillates the magnetron. The received
echo is fed to the MIC and is amplified at the IF amp. The output is divided two lines: one is led
to the display unit and the other is applied to the interface for auto-gain and auto-STC functions.
Figure 2-3. Block Diagram of Scanner Unit
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