Furuno CH-37 - Manual (Page 39)

3-3
Horizontal beamwidth
When the user wishes echoes to be displayed in high resolution, turn R40 on pcb
06P0192 clockwise to sharpen horizontal beamwidth. Do not turn it excessively
clockwise, or an echo which should be displayed as a single solid mass may
become hollow or split into smaller, fewer masses. Normally, set R40 at the mid-
point of its travel.
JP2
HI LO
R61
R40
06P0192
Photo No. 2058
Figure 3-1 Transceiver unit, cover opened
3.3 Heading Alignment
1. Locate a target (buoy, etc.) in the bow direction and display it on the screen at
close range. The heading alignment is correct when the target is displayed at
12 o’clock on the screen.
Heading
Buoy 12 o'clock position
When on-screen target is
skewed right, transducer
heading is skewed left.
Figure 3-2 Checking heading alignment