Instruction Manual

RA51/52/53/54/55 INSTRUCTION MANUAL – 05 29
RADOME SCANNER (RA51)
RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24 36
Number of rings 2 2 2 3 6 6 6 6 6 6
Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4 6
OPEN SCANNER (RA52)
RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48
Number of rings 2 2 2 3 6 6 6 6 6 6
Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4 8
OPEN SCANNER (RA53)
RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 64
Number of rings 2 2 2 3 6 6 6 6 6 6 4
Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4 8 16
OPEN SCANNER (RA54)
RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 72
Number of rings 2 2 2 3 6 6 6 6 6 6 6
Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4 8 12
OPEN SCANNER (RA55)
RANGE 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 96 120
Number of rings 2 2 2 3 6 6 6 6 6 6 6 6
Range ring interval 0.0625 0.125 0.25 0.25 0.25 0.5 1 2 4 8 16 20
5.3.5 Automatic adjustment (AUTO)
"AUTO" adjusts the GAIN, STC and FTC automatically. If the "AUTO" key is pressed after
you've adjusted GAIN, STC, or FTC manually, they will all be switched to "AUTO" or harbor
mode (HBR). By pressing the "AUTO" key repeatedly, you alternate among the AT1, AT2
and HBR modes. By pressing "STC" key, all controls return to manual state.
AT1 Use when navigating in a harbor area, narrow channel, or area with small islands where
there is a high level of echo. The control condition is similar to turning down GAIN
slightly. *
AT2 Use on open sea to suppress sea clutter. The control condition is similar to high GAIN.
*
HBR Also for use when navigating in a harbor area, narrow channel, or area with small
islands. The FTC is switched to manual mode. The STC is set to a predetermined
value that you can select. See section 5.5.4.6.5 (7) "Setting Harbor STC".
* Manual FTC may be used in these modes to reduce the appearance of noise on the
screen.
You can make manual adjustments to GAIN and FTC during AUTO operation.
If the "GAIN" key is pressed, only GAIN enters the manual state.
If the "FTC" key is pressed, only FTC enters the manual state.
However, if the "STC" key is pressed, STC, GAIN, and FTC all enter the manual state.
5.3.6 Sensitivity adjustment (GAIN)
(1) When the "GAIN" key is pressed, the GAIN display characters on the left side of the
screen will be highlighted.
(2) Turn the control knob to select an acceptable level. The numbers will move in a range of 0
to 99.
(3) Press the "GAIN" key to exit from the adjustment state. You can also press any other key
and continue with that function.
To make adjustments manually:
GAIN Control knob GAIN --------------------The adjustment state is ended.
Other function key --Shift to other functions
AUTO AUTO -------------------GAIN, STC, and FTC are set at AUTO
and the adjustment state is ended.