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Using the menus
PP Filter: The Ping-to-Ping lter will only show you the
echoes if they are still present after several consecutive pings
(2, 4 or 8). This function will provide you with a more stable
echo presentation, as spurious echoes will disappear.
Noise level: This button presents a value for the noise in the
cursor beam. This information is used during noise tests.
Vertical menu
The Vertical menu is only shown in modes with a vertical slice
function. All relevant settings, except the
TX Power, can be
selected separately for the vertical modes independent of the
horizontal settings. When any vertical setting is selected and
dened in one mode, the setting w ill be applied to all vertical
modes.
Range: Select the current range.
Bearing: Use this function to adjust the bearing of the white
audio channel line.
Gain: This is the analogue gain. If you activate the AGC
function, this gain setting is ignored.
Pulse form: The standard pulse form is FM Auto. If you
experience a lot of reverberation from the bottom, decrease
the pulse length. In good water conditions while searching for
scattered sh, you may well use setting
CW Long.
TX Power: This button switches the transmission power on
or off.
Frequency: On the SH40 you can alter the sonars transmission
frequency. This is very useful if you have other vessels in the
vicinity. Remember that lower frequencies will increase the
range of your sonar, but also give you a wider beam.
TVG: Time Varied Gain. This function will automatically
adjust the gain in the sonar to compensate for geometric
spread and absorption. Note that the TVG will only work on
ranges below 1500 meters.
RCG: Reverberation Controlled Gain. This function will
automatically remove unwanted reverberation from the
bottom or from the sea surface. It may however also remove
scattered sh.
PP Filter: The Ping-to-Ping lter will only show you the
echoes if they are still present after several consecutive pings
(2, 4 or 8). This function will provide you with a more stable
echo presentation, as spurious echoes will disappear.
302656/A 17
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