2205 System Technical and User’s Guide
Document : 0022175 Rev A Page 23
10. Transducer Characteristics
10.1 Side Scan Transducer Capacitance
Capacitance measurements were made using a LCR meter at 1kHz (table 10-1). Similar measurements
can be made with a capacitance measurement capable DVM. Note that these measurements should be
used as a guide and not an absolute as to a transducer’s status. Extreme deviation (>30%) from these
values, will often be the indicator of a bad transducer.
120kHz Capacitance
Pin 6 to Pin 7
230kHz Capacitance
Pin 6 to Pin 7
410kHz Capacitance
Pin 4 to Pin 5
540kHz Capacitance
Pin 4 to Pin 5
850kHz Capacitance
Pin 2 to Pin 3
Table 10-1. Transducer Capacitance Measurements
10.2 Sub-Bottom Receiver Capacitance
Capacitance measurements were made using a LCR meter at 1kHz (table 10-2). Similar measurements
can be made with a capacitor capable DVM. Note that this measurement should be used as a guide and
not an absolute as to a hydrophone’s status. Extreme deviation from this value will often be the indicator
of a bad hydrophone. As the sub-bottom transducer has an internal transformer and matching network, no
capacitance measurements can be acquired.
Table 10-2. Hydrophone Capacitance Measurements
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