The superconducting gravimeter SG 056 at BFO shall be
recorded on a seismic data acquisition system additionally
to the usual SG-datastream recorded with DVMs (digital
voltmeters). A Q330HR (Kinemetrics, Inc.) data acquisitions
system will be installed for this purpose and the
second output of the SG gravity cards will be supplied to
this digitizer. The Q330HR expects to receive symmetric
differential input signals while the SG 056 superconducting
gravimeter electronics just supply single ended signals.
The buffer amplifier produces symmetric output signals to
be recorded on the Q330HR.