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St. Jude Medical implantable devices introduced in 2010 and later use proprietary
communications protocol based on magnetic induction and, for certain models, an MICS-based
protocol. This protocol prevents unauthorized device communication and recording and protects
sensitive patient information using:
An authentication algorithm
Data encryption
NOTE: The implanted device authenticates telemetry communication before accepting
changes to programmed therapy.
Quality of Service for Wireless Technology
The Merlin™ PCS communicates with St. Jude Medical implanted devices using both inductive
and RF telemetry. Both telemetry methods operate within worldwide limits for emitted power.
Inductive telemetry operates:
At 64 kilobits/s or lower
Over a short range (less than 7 centimeters in normal use)
RF telemetry operates:
Using the MICS band (402-405 MHz)
At 200 kilobits/s or lower
Over a short range (less than 2.5 meters in normal use)
During use, the Merlin PCS displays a signal strength indicator to help clinicians optimize
telemetry wand placement. The transmitter automatically monitors and recovers from most
communication errors, including data integrity errors and excessive latency. If wireless Quality of
Service (QoS) is inadequate, the programmer automatically switches to inductive telemetry.
Bluetooth
®27
Low Energy wireless communication operates:
2.402 to 2.4835 Ghz at 1 megabits/s or lower
Over a short range (within 2 meters in normal use)
Wireless Communication Troubleshooting
If the Merlin™ PCS is unable to communicate with a St. Jude Medical implanted device:
If using inductive telemetry or the RF wand, try re-orienting the wand.
If using Bluetooth
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Low Energy wireless communication, try plugging the USB dongle into
a different USB port.
Minimize the amount of objects or people between the programmer and the patient
Avoid holding the inductive telemetry or RF wand
Move away from or turn the power off of equipment that could generate electromagnetic
interference or strong magnetic fields
Storage and Operating Conditions
Table 7. Storage and operating conditions
Property
Storage
Operating
Minimum Temperature (°C (°F))
-40 (-40)
10 (50)
Maximum Temperature (°C (°F))
70 (158)
40 (104)
27
Bluetooth® is a registered trademark of Bluetooth SIG, Inc.
28
Bluetooth® is a registered trademark of Bluetooth SIG, Inc.
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