Quality Of Wireless Service; Wireless Security; Telemetry Information - Boston Scientific Spectra WaveWriter Informacion Para Medicos

Information for Prescribers

Quality of Wireless Service

The Spectra WaveWriter uses a Half-Duplex, direct point-to-point, primary-secondary
communication system with the following characteristics:
• Typical range:
» 36 inches (91.4 cm) between Remote Control and Stimulator with 95% or higher
communication success rate.
» 33 inches (83.8 cm) between Wand and Stimulator with 95% or higher communication
success rate.
• Timing: Once a command is initiated by the user, the system will respond in less than 1.5
seconds.
• Telemetry failures:
» The signal to noise ratio is measured before initiating a communication. Telemetry
failures can occur if signal-to-noise ratio is low. Signal to noise measurement is retried
up to three times in case of insufficient range or in presence of electromagnetic
disturbances. User is notified of the communication failure after 3 failed attempts.
» Packet and message errors are verified for accuracy. Any erroneous packets/
messages are rejected and re-sent up to 3 times. User is notified of the communication
failure after 3 failed attempts.
» User may re-try the command or follow on-screen instructions for telemetry help.

Wireless Security

The Spectra WaveWriter System has a short range inductively coupled telemetry system.
A Remote Control (or Wand) has to be linked with a stimulator to allow communication.
The Stimulator will not respond to any device that it is not linked to. There are additional
mechanisms that ensure the integrity of the communicated data.

Telemetry Information

Frequency Band: 119 – 131 kHz
Modulation type: FSK
Effective Radiated Power: 0.05 mW (-13 dBm) maximum
Magnetic Field Strength (at 3 m distance): 46 μA/m
The Remote Control communicates with the Stimulator (ETS or IPG) through an RF telemetry
link. When the RC is unable to communicate a command to the Stimulator, it will display a
"Communication Failed" screen and provide two options: Retry and Telemetry Help. The Retry
option resends the last command. The Telemetry Help option assists the user in discovering
an optimal position to hold the RC to ensure communication with the Stimulator. The user
Spectra Wavewriter™ System Information for Prescribers
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