7
1 Echo simulator
Connect SIM990 to the echo sounder
’s transducer input/output interface. The
echo simulator is used to verify that the transceiver electronics is working
satisfactory. This should be used if the system seems to have shorter range
than normal, if there is too much noise on the screen, or if the system looses
the bottom.
Important, warning:
Use the cable for echo sounder tester, the one
without cable clips
. The
wires are different and damage can be caused by using the other wire.
Use
or
and select 1. ECHO SIMULATOR and press
.
The following screen picture will appear:
Screen picture
Description
1. INPUT MEASURE
is used for showing the
transmitter signal values from the echo sounder.
2. AUTO TRACK
is used to measure in the
incoming pulse and return the same pulse width
and frequency with a user determined amplitude
and depth.
3. BOTTOM SET
is used to set all the returned
parameters including frequency and bottom width.
4. DEMO
is used to show a moving bottom, with
fish if required.
1. INPUT MEASURE
2. AUTO TRACK
3. BOTTOM SET
4. DEMO
Echo sounder
’s transducer
input/output interface
interface
