Download - ADInstruments

Introduction
Conventional amplifiers usually have controls on the front to adjust
for the connected transducer: this means fiddling around each time
you change transducers or amplifiers, with a chance each time of
making the wrong settings, and damaging equipment.
Front-ends are designed to be easily transferred between recording
units, and quick to disconnect and reconnect, so it makes more sense
to adapt the transducer. This work needs only be done once for any
third-party transducer, which can then be used with any GP Amp.
Once set up, multiple transducers will work with the same GP Amp
without needing further adjustment, and one can simply change
connected transducers at will.
Some soldering of components is required to adapt third-party
transducers for use with your GP Amp. If you have little experience
with electronics and no technician to assist you, your ADInstruments
representative should be able to help.
Unpowered Signal Sources
The GP Amp can be connected to signal sources that do not need to be
powered, for example, electrodes or passive transducers such as
piezoelectric strain gauges. Connection of unpowered transducers to a
GP Amp is relatively straightforward. First read this section carefully.
The requirements of the transducer should be determined before
attempting to connect it up.
You will need this equipment:
• a soldering iron and resin-cored solder (only resin-cored solder!)
• an appropriate connector for your GP Amp (an 8-pin DIN-style
male plug with 45-degree pin spacing — one is supplied with the
front-end).
Wiring Up the Transducer
To prepare an unpowered transducer for use with the GP Amp, wire
the transducer to the plug so that it can connect up.
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GP Amp Owner’s Guide