Simrad DX45, Руководство по установке

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Setup menu Chapter 9-3
Tuning reference:
Normally there should be no need to adjust the
Tuning reference. However, if sensitivity is poor or there are any
symptoms at all suggesting improper tuning, you may need to make
an adjustment: Choose a displayed range of 3nm or higher. Use
cursor to go to the Tuning reference value. Use +/- keys to adjust the
value in single steps (allowing 3-4 revolutions) until weak echoes in
the distance becomes acceptable.
Zero range/timing:
Most common settings are between 105 and
115. Default setting depend on which scanner type is connected.
To adjust: Press the [1] key to set the displayed range to 0.125nm.
Use cursor to highlight “Sea” and with +/- keys set the sea clutter to
zero, then move cursor to MBS level and change all figures to zero,
so you can see the transmitting pulse. Now adjust the value for Zero
range so the ring around the ship is just closing.
If you have knowledge of the distance to a nearby object, say a mast or
a buoy, you can verify if the Zero range is set correctly by measuring
the distance. To do so, place the VRM ring on top of the object and
check the readout in the control panel (follow procedure in sec. 3.2.5).
If the readout is not the same as the known distance, adjust the value
in Zero range with 1 figure up/down for every 3 meter adjustment.
MBS
- Main Bang Suppression: Each transmitter pulse will result
in an immediate strong return signal, which will form a ‘sun’ (main
bang) in the center of the screen. Main bang suppression is a filter,
which will eliminate or minimize this effect. The first 3-digit
number indicates the level and the last 3-digit number indicates the
length (area). Adjustmets can be made for best performance for
individual antennas. The first 25 to 30 meters, however, will always
be ‘blinded’ by the transmission pulse. Adjustment of MBS requires
STC=0 and reasonable GAIN. If the suppression zone around the
center is too large, suppression length can be lowered. If strong tar-
gets disappear within the suppression zone, the level of suppression
can be lowered.
Sensitivity:
is preset to 048. Adjust value if echoes are not reasonable
clear i.e. the higher the value, the less detailed presentation of echoes.
GZ target threshold:
is preset to 5. Objects are identified according
to weak/strong signals. 1= weakest, 7= strongest.
Sea Auto
and
Sea Harbor
values for the automatic STC modes i.e.
Minimum, Maximum, and Sensitivity. The first two 3-digit num-
bers define the limits of the automatic functions. These numbers