Bridge Amp
Owner’s Guide
22
Unpowered transducers, or those with their own power supply, do
not have to be supplied with any excitation voltage from the Bridge
Amp: they supply their own signal to it directly. The wiring
connections should still be carefully checked before connection, along
with transducer impedance and output voltage. Such transducers do
not need the excitation range to be adjusted from the default setting.
If they have low output voltages, though, then it is possible that their
offset ranges require adjusting.
Using Grass Transducers with DIN Bridge Amps
Most Grass transducers should have an impedance of about 350
Ω
or
so. A few Grass and Grass-compatible transducers have a much lower
impedance, of about 250
Ω
.
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