St. Jude Medical 3875, User Manual

Page: 81 / 96

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resent if not successfully received. Each key press
may transmit up to 4 data packets with up to 20 bytes
per packet, depending on the number of packets that
need to be transmitted (i.e., if there is only one packet
to transmit, only one packet will be transmitted). If the
interference is high (e.g., the bit error rate exceeds
0.1%), the user may experience what appears to be a
slow connection, difficulty pairing devices, and a need
to decrease the distance between connected devices.
For information on how to improve connection issues,
please refer to “Troubleshooting for Wireless and
Coexistence Issues” (page 78).
Wireless Security Measures
The wireless signals are secured through device
system design that includes the following:

The generator will encrypt its wireless
communication.

Only one patient controller may communicate with
the generator at the same time.

A unique key for each unit that is checked during
each transmission.

Built-in pairing that specifies valid and legitimate
pairing among units.

Proprietary authentication in addition to the
pairing procedure specified in Bluetooth
®
Smart
wireless technology, which includes an element of
proximity.