TDT Medusa4Z User Manual page 19

The Test Equipment | 19
be useful if the sound level is found to be systematically too high across all frequencies during
speaker calibration.
Fiber Optic Input Biological signals are digitized on a Medusa4Z preamplifier and transferred
to the RZ6 via the fiber optic port marked 'Optical In'.
Use the provided fiber optic pair (white connectors) to connect the To Base port on the
preamplifier to the Optical In port on the RZ6.
The duplex fiber optic cable has identical one-piece connectors at each end. There is a V-
shaped groove on one side of the connector and a raised rectangle on the other. As shown in
the image above, plug the connector into the RZ6 port with the raised rectangle side up. Plug
the connector into the preamplifier with the V-shaped groove up.
The green LED next to the Optical In port on the RZ6 will illuminate when the preamplifier is
connected and both devices are powered on. This indicates that the Medusa4Z is properly
time-locked with the RZ6.
Mic Inputs The BNC input connector is used during system calibration. See Calibration.