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JRC JFV-700 Installation Manual Page 40

Color echo sounder.
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4.2 Changing to Dual Frequency
Implement changes on the following components on the CML-560-1K/3K. For the entire
view of the CML-560-1K/3K , see Figure 4.1 in page 40.
1. When 200 kHz is selected, move the jumper pins JP721, 722, 725 and 726 to the
position indicated in Table 4.2 of page 42. When 75, 50, 38 or 28 kHz is selected,
move the jumper pins JP JP723, 724, 727 and 728 to the position indicated in the
same figure.
When switching from 200 kHz single frequency to dual frequency, restore P701
and P702 to the original connection.
2. Turn on all JPs on the CML-560-1K/3K. This step must not be ignored whenever you
switch from the single to the dual frequency.
3. Apply the master reset.
For this operation, refer to the "Implementing the Master Reset" in Section 4.3 in page
CD857 •F Indication for high voltage.
See the following 1, 2 and 3.


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