Fiber Optic Port - Optional
The RZ6-A-P1 acquires digitized signals from a Medusa preampli
fi
er over a
fi
ber optic cable.
The port can be used with the RA4PA or Medusa4Z to input up to 4 channels.
The
fi
ber optic port (devices with serial number 1007 and greater) can also support the HTI3
Head Tracker Interface.
Fiber Oversampling (preamp input)
Signals are digitized on the Medusa preampli
fi
er at a maximum sampling rate of ~25 kHz,
however, the
fi
ber optic port on the RZ6 can oversample the digitized signals up to 8X or ~200
kHz. This will allow the RZ6 to run a DSP chain at ~200 kHz and still sample data acquired
through an optically connected preampli
fi
er.
Oversampling is performed on the RZ6. The signals being acquired will still be sampled at ~25
kHz on the preampli
fi
er. This means that, even with oversampling, signals acquired by an
optically connected preampli
fi
er are still governed by the bandwidth and frequency response of
the preampli
fi
er.
Onboard Analog Outputs
The RZ6 is equipped with two channels of 24-bit sigma-delta D/A converters. See
for more information. Analog signals are output through a variety of
connectors on the RZ6 front panel.
Programmable Attenuation
The RZ6 has two channels of programmable attenuation for precision control of analog output
signal levels over a wide dynamic range.
Programmable attenuation in the RZ6 is achieved using both analog and digital attenuation
methods. The device supports analog attenuation values of 0, 20, 40, and 60 dB. Attenuation
values which lie in-between or exceed 60 dB are handled using digital attenuation.
For example, if you set an attenuation value of 66 dB, the analog attenuator will be set to 60 dB
and the remaining 6 dB of attenuation will be applied by scaling the digital signal on the
processor before it goes to the DAC.
RZ6 Multi I/O Processor | 12
