Q & A
8-9
36. ARPA targets are quickly lost.
See page.4-8.
1) Check that the TX output interval of the AD converter is 25 msec.
2) Check that the data of [Menu] -> 0 -> 6 -> 8:TRACK PRESET is not changed
from the default. If the default setting is changed, execute [Menu] -> 0 -> 6 ->
0:DEFAULT to return the ARP preset setting to the default.
3) Check whether targets are displayed correctly in [Menu] -> 0 -> 6 -> 5:QV
DISPLAY. If QV echoes are weaker than actual echo, try changing the set of
[Menu]-> 0 -> 6 -> 4:ECHO LEVEL.
4) If a target is lost in a particular direction, check whether pictures are presented
too large than the land size set by [Menu] -> 0 -> 6 -> 7 -> 2: LAND SIZE.
5) When the ship speed data is inputted by the GPS and a target is lost by changes
of ship speed, remove the ship speed signal from the log.
6) Try re-adjustments of the setting of [Menu] -> 0 -> 2 -> -2:CABLE ATT ADJ.
37. The antenna does not rotate on FAR-2837SW.
See page. 4-24.
The power to the antenna motor is supplied via RTR-082. The signal to control
the relay of the antenna power line is “ANT ON” signal outputted from the RFC
board of this unit. If the setting of [Menu] -> 0 -> 4 -> 6:MODEL is not
“30DOWN”, “ANT ON” signal is not outputted. Check this setting is correct.
38. The antenna rotation speed cannot be switched although RSB-097 is
installed.
See page.4-68.
When the gearbox RSB-097 (42 rpm/DC Motor: D8G-571) is used, the revolution
can be switched between 36 rpm and 42 rpm. For this purpose, the PWR board
must be 03PxxxxB or 03Pxxxx D board. It is also needed to make the setting of
[Menu] -> 0 -> 3 -> 4:ANT REVOLUTION. If this is set to “AUTO”, the antenna
revolving speed is automatically switched at the S1/S2 pulse and M/L pulse.
39. Screen is blank even if the RCU-015 is turned on.
This may be caused because brilliance is lowered. Press any key other than the
power key for longer than 4 seconds. This sets the medium brilliance.
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