-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 1
MaxSea version : TimeZero v2
Windows: Windows 7 / Windows 8
Update: May 2013
Furuno Sounder Module (v2 update)
The Furuno Sounder Module unlocks the Sounder Work Space. This
Work Space is dedicated to the display and control of a Furuno
Ethernet Sounder and provides features such as: Sounder Echogram
with real time A-Scope, ACCU-fish and Bottom Discrimination.
TimeZero can display two sounder images at the same time for Dual
Frequency (HF/LF) and Zoom Modes (Bottom Lock & Bottom Zoom).
Paired with a Furuno Ethernet Sounder, TimeZero is a full PC
Sounder solution.
Installation and configuration
Furuno Sounders Compatibility
This feature is compatible with NavNet 3D Network Fish Finders :
DFF1: Black Box Dual-frequency 50/200 kHz DFF3: Black Box Dual
frequencies between 28 and 200
kHz BBDS1: Dual-frequency 50/200 kHz which enables to
indicate bottom classification FCV-1150: Dual-frequency 28/200
kHz which enables
Heaving compensation.
BBDS1
Installation
Sounder Configuration
From MaxSea TimeZero v2 all settings are now directly available
from the Sounder Options (See “Sounder options: Sounder Initial
Setup” chapter). Connecting the Furuno Sounder
Two choices are available: Connect the computer to a switch and
a hub linked to the Furuno Sounder Connect the computer directly to
the Furuno Sounder using an Ethernet crossed cable
Ensure that : - for the DFF1: Mode Switches are in the
“ON-OFF-OFF-ON” position - for the DFF3: Internal DIP S2 switches 1
and 2 are set to OFF.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 2
In the computer
If the PC and sounder are connected to NavNet3D equipment, the
MFD set as Master will act as a DHCP server and will automatically
perform the network configuration of all the other equipment on the
network, including the computer. Just be sure that this one is
configured as an Automatic IP Address.
If the sounder is connected directly to the computer you have to
set the IP address manually. To change TCP/IP settings, follow
these steps: Windows 7/Windows 8
- Type “ncpa.cpl” in the “Search Programs and Files” box - Press
[Enter]
- Right-click on the network adapter that the sounder will be
plugged into. This will display “Local Area Connection”
- Then click Properties - Select “Internet Protocol (TCP/IP)” or
“Internet Protocol
Version 4 (TCP/IPv4)” from the list.
In the General tab of the Internet Protocol Properties
window:
- Select “Use the following IP address” - IP Address:
172.31.3.100 - Subnet mask: 255.255.0.0 - Click OK
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 3
Check the IP address
To check if the computer has a valid IP address, use the
IPCONFIG command. In the “Search Programs and Files box :
- Type “cmd” - Press Enter - Type “ipconfig” in the command
editor.
The 'ipconfig' displays the IP address, the network subnet mask
and the Internet/network gateway address if one is set for that
network. Ensure the IP is compatible with the NavNet network
(172.31.X.X) Make sure also that the subnet Mask is 255.255.0.0
Ping the source sounder
To check the connection between the computer and the Sounder,
ping the sounder IP address. For default sounder configuration type
in the command editor > ping 172.31.92.1 Host Name and
corresponding IP address table
Host Name IP Address
SOUNDER 172.031.092.001
SOUNDER1 172.031.092.011
SOUNDER2 172.031.092.012
SOUNDER3 172.031.092.013
SOUNDER4 172.031.092.014
SOUNDER5 172.031.092.015
SOUNDER6 172.031.092.016
SOUNDER7 172.031.092.017
SOUNDER8 172.031.092.018
SOUNDER9 172.031.092.019
Caution! Never put the “0” before one of the IP address numbers
(x) 172.x31.x92.xx1 For example: if you type 172.031.92.1 the
system will ping in reality 172.25.92.1 which will result in an
error message.
C:\>ping 172.031.92.1 Pinging 172.25.92.1 with 32 bytes of
data: PING: transmit failed. General failure. C:\>ping
172.31.092.1 Ping request could not find host 172.31.092.1. Please
check the name and try again.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 4
Sounder Work Space
This Work Space is dedicated to the display and control of a
Furuno Ethernet Sounder. The Sounder can be directly connected
(using an Ethernet Cable) to MaxSea TimeZero enabling the following
features:
Sounder Work Space overview
Sounder Echogram display
Control of the various Sounder modes, display and adjustment
A-Scope display Detection of fish (ACCU-Fish) Bottom
Discrimination Display (BBDS1 only)
Echogram display
The Sounder workspace will propose you a full screen single
frequency echogram display. Display and sounder settings can be
adjusted as shown below.
Depth
Range
Display Mode indicator (HF, LF, BZ, BL)
Horizontal scale : time elapsed
Vertical scale : Depth
Historic Data
TimeZero stores the data received in the past 3 minutes
(approximately). You can then easily go back and identify echoes
that seem interesting.
To display historic data, you can scroll the image backwards
using the "Pan" tool
Note: Time is displayed in the Horizontal scale.
You can quickly go back to the actual boat position by clicking
the “Center On” tool
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 5
Geo-localisation The “Sounder and Nav” Work Space can be used to
display side by side the Plotter and the Sounder. Cursor
geolocation Moving the cursor across the Sounder image will
automatically display a red cross cursor on the Chart allowing you
to geolocate any Sounder “sweeps”.
Add a mark Double click on the sounder space to automatically
create a Mark on the chart space, making it easier to go back to
something that was spotted on the Sounder.
Add event (PLOT only) By clicking on the “Event” tool in the
sounder space, you can automatically create a Mark on the chart
space at the current boat position.
Sounder Mode
To change the display mode click the "Sounder Mode" button from
the Sounder Work Space ribbon and select the options:
HF : Higher frequencies (200 kHz)
The higher the frequency of the ultrasonic signal, the better
the resolution. For this reason the 200 kHz frequency is ideal for
detailed observation of fish schools. LF: Lower frequencies (50
kHz) The 50 kHz frequency is useful for general detection and
judging bottom condition. When acoustic energy travels through the
water, the frequency determines how deep it will travel and also
the level of definition you can expect to see after it has bounced
off an object below.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 6
Single frequency display
The single frequency display shows either the low-frequency or
high-frequency picture on the whole screen. Select a frequency LF
or HF according to your purpose.
Note: You can switch the frequency between HF and LF by clicking
the sounder scale box at the bottom left-hand corner of the sounder
display.
Dual frequency display
The dual frequency display provides both low and high frequency
pictures. Use the dual frequency display to compare the same
picture with two different sounder frequencies.
Note: You can switch the between LF/HF frequency displays by
clicking on the sounder scale box at the bottom left-hand corner of
the sounder display.
Bottom Zoom Mode
The “Bottom Zoom” display expands the bottom and the fish near
the bottom according to the “Zoom Range Span” in “Sounder
option”.
This mode only changes the zoom scale (enlargement of a portion
of the echo) and is very useful in determining the density of the
bottom:
A short echo tail normally indicates a soft bottom (sand bottom,
etc.).
A long echo tail indicates a hard bottom. Note: "Bottom Zoom"
Mode operates in dual display with HF/LF frequency display.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 7
Bottom Lock Mode
The bottom lock display provides a normal picture on the right
half and a 7 to 400 feet (2 to 120 meter) wide layer in contact
with the bottom is expanded on the left half, according to the
“Bottom Lock Range Span” selected from the “Sounder Option” menu.
This display helps you separate the fish near the bottom from the
very bottom. The bottom lock mode allows the undulating bottom to
be displayed on the screen as flat, while fish above it are shown
clearly.
Auto Range
The Range can be adjusted manually or automatically. Automatic
adjustment is useful when you are preoccupied with other tasks and
do not have the time to adjust the display. The range is
automatically changed to keep the bottom echo on the lower half of
the screen. - Check the box to activate the "Auto Range" mode.
Manual Adjustment
When the automatic mode is disabled, Range can be adjusted using
the R+ and R- buttons from the toolbar.
Clicking on R+ changes the scale to higher values (The sounder
will allow deeper vision)
Clicking on R- changes the scale to lower values. (The sounder
will provide a "less deep" view)
The mouse wheel can also be used to manually change the display
scale. Note: The range cannot be changed in the “Auto Range” mode
or the bottom discrimination display.
Day/Dusk/Night/Automatic
Adjusts the sounder screen background according to the ambient
luminosity (No interaction with the sounder itself)
Default setting : Day Range of choice : Day, Dusk, Night,
Automatic
When set to Automatic, TimeZero will automatically switch modes
according to your local sunset and sunrise time. Note: Background
color can be set from the sounder options.
Day Backgound
Dusk Backgound
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 8
Transmit
The Transmit option allows to turn on or off (Stand-by) the
sounder transmission. - Check the box to turn on.
Sounder Display
To add items to the Sounder window, click on the “Sounder
Display” button in the work space ribbon, and then select items to
add:
A-Scope
A-scope, display on the right of the screen, show echoes at each
transmission with amplitudes and tone proportional to their
intensities. It is useful for estimating the kind of fish school
and bottom composition.
Weak reflection (Fish or noise)
Strong reflection (Fish)
Strong reflection (bottom)
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 9
ACCU-fish
“ACCU-fish” display
Click on the “Sounder Display” button in the ribbon to go down
the menu and set the “ACCU-Fish” display:
Choose the “ACCU-Fish” icon to show or hide information in the
echo-gram space
Choose the “ACCU-Fish color” item to change the color of the
display
Choose the “ACCU-Fish icon” item to change the icon symbol
The ACCU-Fish feature estimates the length of each fish and
shows a fish symbol and depth value or fish length.
Note: The information presented by this feature is intended for
reference purposes only; it is not a completely accurate
measurement of fish length. This feature requires the appropriate
transducer and either Network Sounder BBDS1, DFF1 or DFF3. Both
high and low frequencies bouncing back from the center of the
transducer beam are used to calculate fish length, when ACCU-Fish
is enabled; the sounder will work in dual frequency mode. Note: In
the case of a fish school, echoes overlap one another, so the
margin of error will be greater.
Fish geolocation
When the “Sounder and Nav” Work Space is used to display the
Plotter and Sounder side by side, every ACCU-Fish icon will
automatically appear geolocated on the chart. Note: Fish icons fade
away after a length of time that can be set up by the user.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 10
Bottom Discrimination Display (with BBDS1 only)
The bottom discrimination windows can be displayed from the
Sounder workspace. The display is available in all screen
divisions, single or dual frequency mode and occupies the bottom
1/6 of the screen. Click on the “Sounder Display” button in the
ribbon to roll down the menu and choose "Bottom".
For more information consult the Technical Note: New Bottom
Hardness and Classification Feature with BBDS1
http://download.maxsea.com/Commercial/technical_notes/TN_EN_New_Bottom_Hardness_and_Classification_Feature_with_BBDS1.pdf
Sounder Adjustment
The gain may be adjusted automatically (Fishing or Cruising) or
manually. Click on the “Sounder Adjustment” button in the ribbon to
roll down the menu to choose the appropriate Gain setting among
Auto Fishing, Auto cruising or Manual mode.
Automatic Settings
The HF and LF Gain controls adjust the sensitivity of the
receiver. In automatic mode, the gain will automatically allow to
display the bottom echo in a reddish brown colour. There are two
automatic modes available in MaxSea: Auto Fishing
Select this mode to clearly display weaker echoes when searching
for fish schools. Auto Cruising (Route Auto)
Select this mode to clearly display stronger echoes (for
example, the bottom) and suppress weak echoes. Use it for general
cruising.
Auto Fishing Auto Cruising
http://download.maxsea.com/Commercial/technical_notes/TN_EN_New_Bottom_Hardness_and_Classification_Feature_with_BBDS1.pdf
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 11
Manual Mode
Select this mode to manually adjust HF or LF gain. The setting
range is 0 to 100. To adjust the value:
- Click on “Sounder Adjustment” button - From the drop down
menu, click on the slider directly or
use the mouse wheel (with the cursor over the slider). Note: Use
a higher setting for deep waters and a lower setting for shallow
waters. In any case, adjust the controls so that a slight amount of
noise remains on the screen.
GAIN LF : 0%
GAIN LF : 100%
Interference Rejection
Interferences from other fish finders and electrical equipment
can introduce artifacts (or noise) on the sounder screen. Click on
the Sounder Adjustment Ribbon menu and choose between Auto/ Off /
high or Low.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 12
Sounder options
The Sounder options allow you to configure various advanced
Sounder Setup and Display preferences. These Sounder Options will
only be available if you have unlocked the Furuno Sounder Plus
Pack. To change the settings:
- Click the "MaxSea" Menu - Click on "Options ..." - Select
"Sounder".
You can also access the options by selecting "Options ..." from
drop-down menus on buttons in the Sounder Work space ribbon.
Sounder options
Fish Finder Source
Allows you to choose the sounder to be used. To Select:
- From the drop-down list select a source if several devices
have been detected.
Day Background Color
Determines the sounder screen background colour in day mode. To
change the value:
- From the drop-down list select the required colour: Default
value: White Range of choice: White, Light blue, Black, Dark
blue
Night Background Color
Determines the sounder background screen colour in night mode.
To change the value:
- From the drop-down list select the required colour: Default
value: Dark blue Range of choice: Black, Dark blue
Echo Color Levels
Allows you to choose to display the echo presentation in
colours, with colour assignment dependent on the strength of the
returned echo. To change the value:
- From the drop-down list select the required colour level:
Default value: 64 colours Range of choice: 8, 16 or 64
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 13
A-Scope Peak Hold
Allows to hold the echo return in the A-Scope for a couple of
seconds. Activation:
- Check the box to activate. Zoom Reference Lines
This option allows to Show or hide the zoom marker lines that
appear on the right part of the display when working in “Bottom
Zoom” or ‘Bottom Lock” modes. Activation:
- Check the box to display marker lines.
High Resolution
Shows the graphical echo in high resolution and improves its
display. Activate to get higher screen resolution and greater
detail When disabled, smoother echoes are displayed, however the
screen resolution is lower.
To apply:
- Check the box to display in high resolution. Picture
Advance
The picture advance speed controls how quickly the vertical scan
lines move across the screen.
A fast advance speed expands the size of a school of fish
horizontally on the screen.
A slow advance speed shortens the school of fish. Use a fast
advance speed to see the bottom hardness. Use a slow advance speed
to see a smoother bottom.
To change the value:
- From the drop-down list select the required speed: Default
value: 1 Range of choice: 4, 2, 1, ½, 1/4, 1/8, 1/16, Stop
Fast Slaow
Range Shift
The range shift functions let you select the depth you can see
on the screen. This function is not available when “Auto Range” is
active. To change the value:
- Go to the "Range Shift" field - Type scale (value and unit) -
Press [Enter] to confirm.
You can also change the offset with the mouse:
- Click on sounder echo display - While holding down the click,
shift the image up or down - When the desired "Range" is reached
release the mouse click.
Note: This function is not available when “Auto Range” is
active.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 14
Bottom Range Shift Area
Select the area where to show the bottom echo, when “Auto Range”
is active. For example, setting 50% would place the bottom echo at
a position equivalent to 50% from the top of the screen. To change
the value - Move the cursor with the mouse - Or enter the desired
value
Default value: 75% Range of choice: from 15% to 85%
Zoom Range Span
Set up the height of the view of the bottom zoom observation
without modifying the echo range. This allows you to zoom-in on a
part of the echo. To change the value: - Go to the “Zoom Range
Span” field - Type the required Range value (value and unit) -
Press [Enter] to validate Note: Used in “Bottom Zoom” mode
only.
Bottom Lock Range Span
To set up the height of the Bottom lock observation view. The
Echo range is simultaneously modified. To change the value: - From
“Bottom Lock Range Span” field - Type the required Range value
(value and unit) - Press [Enter] to validate Note: Used in “Bottom
Lock” mode only.
ACCU-fish Info
Fish information is displayed in either depth or size of the
detected fish. It is displayed below the echo at the detection
location. To select the value: - From the drop-down list select the
required information:
Default value : Depth Range of choice : Depth or Fish size
ACCU-Fish Symbols
This option determines the fish symbol used to mark detected
fish. To select the symbol: - From the drop-down list select the
required symbol:
Default value: Solid Range of choice: Off, Solid, Stripped
Fish symbol Off Solid
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 15
Note: This choice is also available directly from the "Sounder
Display" button.
Stripped Stripped & red
ACCU-Fish Size Correction
The fish size shown on the screen can be different from the true
size. If the size is wrong, add an offset to the measured value to
get a more accurate indication on the screen. To adjust the size of
fish information: - Move the slider to the desired value :
Default value: 0% Range of choice: From -80% to 100%
Setting Revised size
+ 100 Two times
+ 50 1,5 times
- 50 1/2
- 65 1/3
- 75 1/4
- 80 1/5
Heaving Correction (MFD Required)
When the ship is in rough seas, the bottom echo and the echoes
from fish are not stable, because the distance to the bottom
changes. To remove this problem, the satellite compass sends pitch
and roll data to the fish finder to adjust the TX and RX beams.
This function requires a FURUNO Satellite Compass. Note: MFD
Required on the TimeZero NavNet Network. Interference Rejection
Interference from other fish finders and electrical equipment
appears on the screen as shown in the illustration. When these
types of interference appear on the screen, use the interference
rejector to reduce the interference. To Reduce Interference: - From
the drop-down list select the required value:
Default value: Auto Range of choices: Off, Low, Medium, High,
Auto
Note: Turn off the interference rejector when there is no
interference, so that you do not erase weak echoes.
Clutter
Low intensity “spots” of noise appear over most of the screen
like in the illustration shown below. These spots are caused by
sediment in the water or noise. To reduce this type of noise. -
Move the slider to the desired value:
Default value: 0 Range of choice: From 0 to 100
Transition 0 to 100
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 16
Colour Erase:
Increase this setting to remove weak sounder return from the
screen (remove the colours that are used to display weak echoes).
To adjust this value: - Move the slider to the desired value :
Default value: 0 Range of choice: From 0 to 50
Color Erase = 0
Color Erase = 50
White Marker:
Allows the user to change one colour of the sounder colour
palette to white. This feature is useful to accentuate echoes of a
specific strength. To adjust this value: - From the drop-down list
select the required value:
Default value : Off Range of choice : Off, color 1 to color
8
White Marker Off
White Marker Color8
White Edge
Check this option to display a white line over the bottom. This
can be helpful to distinguish fish that are close to the bottom
(they would appear above the white line). TVG HF et LF : (Time
Varying Gain) This compensates for propagation attenuation of the
ultrasonic waves. It does this by equalizing echo presentation so
that fish schools of the same size appear in the same density in
both shallow and deep waters. In addition, it reduces surface
noise. To Adjust TVG (can be set separately for HF or LF) - Move
the slider to the desired value :
Default value : 5 Range of choice : 0 to 9
Note: if the TVG level is set too high short range echoes may
not be displayed. Illustration:
TVG LF = 0
TVG LF = 5
TVG HF = 0
TVG HF = 9
Transmit Rate Auto
Automatically sets the transmit rate according to the ship’s
speed, and it is inoperative when there is no speed data. In normal
use, leave this setting at the maximum value. Activation:
- Check the box to turn on.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 17
Transmit Rate Manual
Change the TX pulse repetition rate to 21 levels to prevent the
second reflection echo.
Use 21 (highest power) in normal use. Lower the TX rate in
shallow waters to prevent the second
reflection echo.
To adjust the Transmit Rate - Move the slider to the desired
value:
Default value: 21 Range of choice: from 0 to 21
Sounder Transmit
This transmit option allows you to turn on or off (Stand-by) the
sounder transmission. - Check the box to turn on.
Fish Finder Alarms Two types of fish alarms set off audio and
visual alarms to tell you that there are fish echoes in the area
you selected. These alarms are called “Fish Alarm” and “Fish Alarm
for Bottom Lock”.
“Fish Alarm”
The “Fish Alarm” function tells you when an echo above some
(adjustable) strength is within the alarm range you have
chosen.
- Check the “Fish Alarm” box to activate the alarm when
detecting fish.
- Adjust the Minimum and Maximum alarm range from the “Minimum
Range Values and Maximum Range Values” fields.
“Fish Alarm for Bottom Lock”
The “Fish Alarm for Bottom Lock” function tells you when fish
are within a certain distance from the bottom. The “bottom lock”
display must be active to use this alarm.
- Check the “Fish Alarm for Bottom Lock” box to set off an alarm
when fish are detected.
- Adjust the Minimum and Maximum alarms for bottom lock range
from the “Range Minimum Values and Range Maximum Values”
fields.
“Fish Alarm level”
You can select the strength of echoes that trigger the fish
alarms. To adjust this level: - From the drop-down list select the
desired value:
Default value : Medium Range of choice : Low, Medium, High
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 18
Sounder Initial Setup
“Zero Line Rejection”: Check this option to mask the echoes near
the top of the screen (that are caused by the transducer itself).
Use the "Zero Line Range" settings to increase or decrease the
height of the mask.
“Transducer Draft”: Sets the transducer’s draft, to show the
depth between the sea surface and the bottom (rather than from
boat to bottom).
“Salt Water”: The rate of echo transmission is different in
salt water. Check this option if you navigate at sea.
“Fish Finder Source”: Click on this button to display all
sounders connected to the computer. Clicking on one sounder name
allows you to select the sounder you want to use in the
software.
“Transducer Setup”: Click the “Transducer Setup” button to
display and set advanced transducer parameters.
- If the Model is chosen, set the model number appropriate to
the High frequencies and the low frequencies.
- If Manual is chosen, adjust the higher frequency and the lower
frequency.
“Motion Sensor” (MFD required): allows the user to define all
transducer positions from the Bow and Stern or from Up and Down or
from Port and Starboard for each frequency HF/LF.
“External KP“: Synchronises transmission with other echo
sounders. Select EXTERNAL KP to synchronise transmission.
-
Technical Note: Furuno Sounder Module (v2 update)
© 1985-2013 MaxSea International - [email protected] - 19
“Bottom level HF and LF“: To Adjust the bottom level value
in HF or LF display.
“Gain Offset HF and LF“: To Adjust the Gain value when working
in Manual mode. Normally, set the gain to the point where excessive
noise does not appear on the screen. Use a higher gain setting for
greater depths and a lower setting for shallow waters.
“Auto Gain Offset HF and LF”: To Adjust the Gain value
when working in Automatic mode.
DFF3 Sounder Initial Setup
“STC HF (LF)”: Delete unnecessary echoes (plankton, air pockets,
etc.) near the surface that hide the fish.
- The settings range is from 0 to 10, and 0 is off. - 10 deletes
unnecessary echoes from the surface to
approximately 16 ft depth. Note: Make sure you do not use more
STC than necessary, because you can erase the small echoes near the
surface.
“Frequency Adjust HF (LF)”: You can adjust the TX
frequency of both low- and high-frequency transducers. Use this
feature when your fish finder and another fish finder operate on
the same frequency, causing interference. Change the frequency of
your transducer by enough percentage points to remove the
interference.
“TX Pulse HF (LF)”: The pulse length is automatically
set according to range and shift. Use a short pulse for better
resolution and a long pulse when detection range is important. To
improve resolution on zoom displays, use [Short 1] or [Short
2].
- [Short 1] improves the detection resolution, but the detection
range is shorter than with [Std] (pulse length is 1/4 of
[Std]).
- [Short 2] raises the detection resolution, however detection
range is shorter (pulse length is about 1/2 of [Std]) than
[Std].
- [Std] is the standard pulse length, and is suitable for
general use. [Long] increases the detection range but lowers the
resolution (about 1/2 compared to the [Std] pulse length.
“RX Band HF (LF)”: The RX bandwidth is automatically
set according to pulse length. - To decrease noise, select
[Narrow]. - For better resolution, select [Wide].
“Temperature Port”: Select the data source for water
temperature.
- [MJ]: The water temperature data from the water
temperature/speed sensor
- [Low Frequency]: The low frequency measured water
temperature
- [High Frequency]: The high frequency measured water
temperature
“Set Hardware to Factory Default”: Click this button
to restore sounder factory default settings.