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:
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
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