| Driving a 9000 Transducer with a 6500 Ranging Board |
Last Modified: 2006-08-14
The following modifications were made to the standard 6500 Ranging Board to enable it to drive the new Series 9000 Environmental Grade Transducer.
Schematic with modifications.
One option to adding the RC impedance matching circuit is to instead switch the XDCR wire (E1) to connect directly to the center tap of the transformer on the 6500 board . The transformer has two pins on one side and three on the other side. The center tap is the middle pin side with three pins. This pin is currently not used on the board. This roughly adjusts for the impedance mismatch of the Series 9000 Transducer instead of using the RC circuit shown above.
Circuit Gain Adjustment
You may not need to switch R1 to a variable resistor. This has not been necessary on some of the boards we have modified. You may want to try the other modifications first and test the board before making this change.
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