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Table of Contents
Summary of Contents for TDT RA4LI
- Page 1 Low Impedance Headstages Hardware Reference Updated 2021-09-15...
- 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.
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Page 3: Table Of Contents
Table of Contents | 3 Table of Contents Low Impedance Headstages RA4LI - Four Channel Headstage Impedance Checking with the Low-Impedance Headstage Headstage Voltage Range RA4LI Technical Specifications RA16LI - 16 Channel Headstage Impedance Checking with the Low-Impedance Headstage Headstage Voltage Range... -
Page 4: Low Impedance Headstages
Additional 20x gain on the headstage improves signal-to-noise of low voltage signals. Impedance Checking with the Low-Impedance Headstage The Impedance checker on the RA4LI provides a simple check of the channel impedance relative to ground. To check the impedance level, press the button next to the channel indicator. -
Page 5: Headstage Voltage Range
± 2.5 V. PZ2 and RA16PA preamplifiers supply ± 1.5V. Third party preamplifiers may vary. TDT recommends using preamplifiers which deliver ± 2.5 V or less. The table below lists the input voltage ranges for the RA4LI headstage for either ± 1.5 V or ± 2.5 V power sources. Power Source Headstage Input Range ±... -
Page 6: Impedance Checking With The Low-Impedance Headstage
PZ5 and Subject Interface supply ± 2.5 V. PZ2 and RA16PA preamplifiers supply ± 1.5V. Third party preamplifiers may vary. TDT recommends using preamplifiers which deliver ± 2.5 V or less. The table below lists the input voltage ranges for the RA16LI headstage for either ±... -
Page 7: Ra16Li Technical Specifications
Low Impedance Headstages | 7 RA16LI Technical Specifications Input referred noise 0.1 uV RMS bandwidth 300-3000 Hz 0.3 uV RMS bandwidth 2-8000 Hz Headstage Gain Highpass Filter 2.2 Hz Lowpass Filter 7.5 kHz Input Impedance 1e6 ohms Electrode Connector Pinout The electrode connector is a 25-pin connector. -
Page 8: Ra16Li-D - 16 Channel Headstage With Differential
Low Impedance Headstages | 8 Name Description Name Description Analog Input Channels Not Used Ground Not Used Reference Headstage Detect Not Used Analog Input Channels Analog Input Channels Ground RA16LI-D - 16 Channel Headstage with Differential The RA16LI-D headstage is designed for fully differential recordings from low impedance electrodes and electrode caps with input impedance between <1 kOhm and 20 kOhm. -
Page 9: Headstage Voltage Range
Low Impedance Headstages | 9 Headstage Voltage Range When using a TDT preamplifier the voltage input range of the preamplifier is typically lower than the headstage and must be considered the effective range of the system. Check the specifications of your amplifier for voltage range. - Page 10 Low Impedance Headstages | 10 Name Description Name Description Not Used Not Used Analog Input Differential Input Ground Analog Input Differential Input Analog Input Differential Input Differential Input Analog Input Analog Input Differential Input Ground Differential Input Differential Input Ground Analog Input Ground Differential Input...
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