Furuno FR-2155, Service Manual

Page: 37 / 152

2-23
CPU2 STATUS = 0000 ......Shows CPU2 status. “0” if normal.
LOG SENSOR ...................Log sensor type.
EXT SPEED ......................IEC-61162 serial speed data being received; VTG/VHW/VBW
If no serial data, xxx.x appears.
EXT COURSE ...................IEC-61162 serial bearing data being received;
VTG/VHW/VBW
When speed data is being fed from a speed log or entered manually,
the course data in VHW is used.
[INPUT SIG CHECK2]
(Keying sequence : [PLOT MENU] [0] [8] [0])
No. 1 = 1234 ......................Echo count at front end processor. If “0” or “2000 or higher” is
dispalyed, adjust the video level with VR103 on the ARP Board.
Replace ARP Board if the value does not change at the adjustment.
To check the front end, rotate the gain control knob from fully cw to
fully ccw and read the echo count. If the number decreases, the front
end functions normal.
No. 2 = 0362 ......................Number of echoes to be received by the DSP. If the number is not
the same as that of No. 1, the gain setting must be decreased.
The DSP overloads receiving many echoes.
No. 3 = 0000 ......................“0” indicates normal. For other than of “0” replace the ARP Board.
MIN HIT = 3 ......................“3” indicates normal.
SCAN = 240.......................Heading signal input interval in resolution of 0.01 sec. (240=2.4 sec)
FE STATUS = 0000 ...........Front end processor status. Normal if “0”
AUTO = 07 ........................Number of automatically acquired targets being tracked.
MAN = 03 ..........................Number of manually acquired targets being tracked.
LOST = 01 .........................Number of lost targets.