TDT Medusa RA16PA Hardware Reference Manual
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TDT Medusa RA16PA Hardware Reference Manual

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RA16PA/RA4PA Medusa PreAmps
Hardware Reference
Updated 2022-10-31

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Summary of Contents for TDT Medusa RA16PA

  • Page 1 RA16PA/RA4PA Medusa PreAmps Hardware Reference Updated 2022-10-31...
  • Page 2 The information contained in this document is provided "as is," and is subject to being changed, without notice. TDT shall not be liable for errors or damages in connection with the furnishing, use, or performance of this document or of any information contained herein.

  • Page 3: Table Of Contents

    Table of Contents | 3 Table of Contents RA16PA/RA4PA Medusa PreAmps Medusa Overview Medusa Features Analog Acquisition Channels Clip Warning Lights Power Light Headstage Connector Base Station Connector - To Base Power LEDs Power Requirements RA16PA/RA4PA Technical Specifications Pinout Diagrams...

  • Page 4: Ra16Pa/Ra4Pa Medusa Preamps

    RA16PA/RA4PA Medusa PreAmps | 4 RA16PA/RA4PA Medusa PreAmps Medusa Overview The Medusa Preamplifiers are low noise digital bioamplifiers and are available with either PCM or Sigma-Delta ADCs. The system amplifies and digitizes up to 16-channels of analog signal at a 24.414 kHz sampling rate. The amplified digital signal is sent to the base station via a noiseless fiber optic connector.

  • Page 5: Medusa Features

    RA16PA/RA4PA Medusa PreAmps | 5 Medusa Features Analog Acquisition Channels The RA16PA and RA4PA standard Medusa Preamplifiers acquire signals using 16-bit PCM ADCs, which provide quality acquisition with minimal delay. The RA16SD and RA4SD use Sigma-Delta ADCs, which have several characteristics that improve signal quality. Oversampling of the signal before conversion removes aliasing of high frequency RF signals.

  • Page 6: Headstage Connector

    RA16PA/RA4PA Medusa PreAmps | 6 Headstage Connector The headstage connector is a 25-pin (16-channel) connector. Information on the pin inputs is provided with the technical specifications. Base Station Connector - To Base Use the provided fiber optic pair (white connectors) to connect the To Base port on the preamplifier to the optical input port on the base station.

  • Page 7: Power

    The Li-ion battery supplied with the system cannot be removed. If battery life longer than 30 hours is required, an external battery pack can be connected to the voltage inputs of the charger. TDT recommends a 6 Volt (minimum) to 9 Volt (maximum) battery, such as lead acid batteries used for motorized wheel chairs. See Tech Note #0256 for more information.

  • Page 8: Ra16Pa/Ra4Pa Technical Specifications

    RA16PA/RA4PA Medusa PreAmps | 8 RA16PA/RA4PA Technical Specifications Includes specifications for the RA4PA, RA16PA, and RA16SD Medusa Preamplifiers. RA4PA: 4-channels 16-bit PCM RA16PA: 16-channels 16-bit PCM RA16SD: 16-channels 16-bit sigma-delta Sample Rate 6, 12, or 25 kHz Maximum Voltage In RA4PA and RA16PA: ±4 mV RA16SD: ±5 mV Frequency Response...
  • Page 9 RA16PA/RA4PA Medusa PreAmps | 9 Name Description Name Description Analog Input Channels Positive Voltage (+1.4 V) Ground Ground Negative Voltage (-1.4 V) Reference Headstage Detect Do Not Connect Analog Input Channels Analog Input Channels Do Not Connect...

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