Revision 2.00 / LB-0805 – CerePlex W: Instructions for Use
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©2019 Blackrock Microsystems®, LLC
the previous valid frame of data is re-used. Frames passing the FC check then
go on to be further validated.
Identical Stream Logic (ISL)
When two or more antenna input channels pass the LOL check, the individual
channel’s data from a CerePlex W frame are further validated. Each CerePlex W
channel is devoted 12 bits of information within a frame. The ISL compares
information from two CerePlex W channels, therefore making comparisons in 24-
bit segments. If two or more antenna input channels show identical information
between these 24-bit segments on different antenna input channels, the higher-
priority antenna input channel’s information for that 24-bit segment of the frame
goes into the wireless receiver’s output buffer. ISL occurs for all CerePlex W and
receiver firmware versions.
Checksum
Unlike the ISL protocol, the checksum protocol requires only one antenna input
channel to operate. The last 12 bits of the CerePlex W’s frame are the sum of all
previous 12-bit segments within that frame. Integer overflow is handled by
wrapping; if the checksum bits are not equal to the sum of the previous 12-bit
segments within the frame, that frame’s data is discarded and does not qualify to
enter the receiver’s output buffer. The checksum data validation step is only
utilized when the CerePlex W firmware AND the receiver have v2.0 firmware or
later
.
Cleaning, Maintenance, and Disposal
The rechargeable battery used to power the CerePlex W headstage is rated for approximately
500 recharge cycles. Eventually, the battery will lose its ability to maintain its original capacity.
At such time, contact a Blackrock representative if you would like to coordinate a replacement.
The CerePlex W headstage should be kept dry and
free of debris. A gentle cleaning using small amounts
of water with gauze can clean the outside of the
headstage if necessary.
There is a conductive filament film membrane that
permits contact between pads on the pedestal
connector and pads on the CerePlex W headstage
(
Figure 12
). Eventually, this filament film will
compact or become soiled and fail to permit reliable
connection between the pedestal and headstage. If
this appears to be the case, contact a Blackrock
representative if you would like to purchase a
replacement by emailing
[email protected].
All devices, both used and unused, should not be
disposed with household waste. Return to a
recycling point for electric and electronic devices.
Figure 12 – View of the CerePlex W
headstage input connector.
