TDT PZ5 Guida all'applicazione

PZ5 NeuroDigitizer

Hardware Reference

Updated 2021-04-19

Tucker-Davis Technologies

11930 Research Circle

Alachua, FL 32615 USA

Phone: +1.386.462.9622

Fax: +1.386.462.5365

Notices

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.

The latest versions of TDT documents are always online at https://www.tdt.com/docs/

PZ5 NeuroDigitizer | 2

Table of Contents

PZ5 NeuroDigitizer

4PZ5 Overview

5System Hardware

6Hardware Setup

7Connecting Headstages and Electrodes

7Powering ON/OFF

7Physical Amplier

8Logical Ampliers

9Analog Recording Reference Modes

10Sampling Rate and Onboard Filters

10Sampling Rate and Digital Input Channels

11Amp Type Presets

12PZ5 Software Control

13Recording 128 Channels at 50 kHz

13PZ5 Touchscreen

14Impedance Checking Screen

16Waveform Display Screen

17Manual Conguration

17Amp Type Selection Screen

18Conguration Options Screen

19Battery Status

20System Setup Screen

20System Congure Screen

21System Info Screen

22System Update Screen

22Wireless Networks Screen

23PZ5 Features

23Clip Warnings and Activity Display

24External Ground

24Battery Overview

25Charging the Batteries

25PZ5 Technical Specications

25Analog Inputs

26Digital Inputs

27General

27Input Connectors

28Pinout Diagrams

Table of Contents | 3

PZ5 NeuroDigitizer

PZ5 Overview

The PZ5 is a multi-modal NeuroDigitizer suitable for recording a broad

range of biological potentials. Its analog input boards combine the

functionality of the PZ2 and PZ3 ampliers in a single device that can be

used for both high and low impedance input signals simultaneously. The

PZ5 may also include digital input boards for inputting signals from an

Intan RHD2000 amplier board with up to 128 channels.

Analog input boards oversample the signal with very fast instrumentation

grade converters. TDT's custom hybrid A/D circuit yields 28 bits of

resolution and unparalleled dynamic range. Optional DC coupling offers

zero phase distortion across the signal bandwidth. Sampling rate and down-sampling lters

can be optimized on each logical amplier for the intended input type to optimize signal

delity. The ± 500 mV input range is large enough to accept any biological potential and most

stimulus artifacts without saturating.

The PZ5 analog inputs are organized into 16-channel banks. Each bank is electrically isolated,

meaning the ground and reference channels are not inherently shared between banks. Multiple

banks can be grouped into a single logical amplier that shares the same settings and ground/

reference among each bank in the logical amplier. There are several different referencing

modes; each logical amplier can use the ground as a reference, use a shared reference, use a

unique reference on each bank or implement full per-channel differential referencing.

Digital inputs are used exclusively with RHD2000 series amplier boards and SPI Interface

Cables, available from Intan Technologies. Each input serves as a bank of channels and may

be up to 128 channels, depending on the connected amplier board. Each digital board can be

its own logical amplier, isolated from the other boards, or be grouped with other digital boards

in a larger logical amplier conguration.

A touchscreen interface provides immediate preview of inputs, impedance checking and real-

time control and conguration options for each amplier bank.

The PZ5 is available in 32, 64, 96, or 128 analog channel models. The PZ5 is also available with

2 or 4 digital inputs and models that combine 32 or 64 analog input channels with 2 or 4 digital

PZ5 NeuroDigitizer | 4

inputs. The PZ5 can support a total of up to 128 analog channels or up to 256 digital channels

or up to 256 mixed channel types. The total number of channels is generally reduced to 128 at

higher sampling rates, up to 50kHz. See Sampling Rate and Digital Input Channels for more

information.

System Hardware

The PZ5 accepts inputs from a variety of electrode/headstage combinations via the back-

panel. Each analog board has a mini-DB26 connector that accepts 16 recording channels (or 8

differential channels) along with ground and reference. Digital boards have a 12-pin Omnetics

connector for Intan headstages and can accept up to 128 digital channels each. The PZ5 can

return at most 256 recording channels to the RZ base station.

Analog signals are digitized and transmitted to the RZ base station for further processing via a

single ber optic connection. Conguration information is also sent from the RZ to the PZ5

across the ber optic connection. The PZ5 can connect to the 'PZ Amplier' input on an RZ2

base station, or directly to any RZDSP-P card or optical QZDSPO quad card on any RZ base

station.

A standard recording conguration includes electrodes appropriate to the input signals, a

breakout box or one or more Z-Series headstages (such as ZC32), a PZ5 and an RZ base

station.

The diagram below illustrates this ow of data and control information through the analog

system.

To record at ~50 kHz on 128 or more channels, see

PZ5 Software Control

for more information.

Note

PZ5 NeuroDigitizer | 5

PZ5 Data and Control Flow Diagram

Hardware Setup

TDT recommends fully charging the PZ5 before use. The PZ5 battery charger connects to the

round female connector located on the back panel.

A 5-meter paired ber optic cable is included to connect the PZ5 to the base station. The

connectors are color coded and keyed to ensure proper connections.

The diagram below illustrates the connections necessary for PZ5 operation.

System Connection Diagram for PZ5 with RZ2

To avoid introducing EMF noise, DO NOT connect the charger to the PZ5 while collecting data.

Important

PZ5 NeuroDigitizer | 6

System Connection Diagram for PZ5 with RZ5D

Connecting Headstages and Electrodes

Analog signals are input via multiple mini-DB26 connectors on the PZ5 back panel. For high

impedance recordings, one or more Z-Series headstages can be connected to the input

connectors on the PZ5 back panel. For low impedance recordings, an S-BOX input splitter or LI-

CONN low-impedance connector can be used. Alternately, custom connectors and a breakout

box with a male mini-DB26 connector can be used. If using custom connectors, see Pinout

Diagrams.

Digital signals are input via Intan connectors on the PZ5 back panel.

Powering ON/OFF

To turn the PZ5 on, move the toggle switch located on the back panel of the PZ5 to the ON

position.

Physical Amplier

All PZ5 analog input channels are organized into groups of 16 channel banks, with each bank

corresponding to a rear panel headstage connector (labeled alphabetically from bottom to top)

and a front panel LED display.

Digital input channels are associated with a digital board corresponding to a rear panel digital

input connector (labeled from bottom to top following, alphabetically, any analog input

connectors). Each digital board is a bank that can comprise 16, 32, 64, 96, or 128 channels,

depending on the connected Intan amplier board(s).

PZ5 NeuroDigitizer | 7

Each bank is electrically isolated and can be independently congured or grouped with other

banks and dened as a logical amplier. Analog and digital boards cannot be combined

together.

Logical Ampliers

Though each bank has its own ground and reference, a single ground and reference can also

be dened and shared across all banks of the logical amplier. See Analog Recording

Reference Modes for analog input banks.

Two Possible Logical Amplier Congurations for a PZ5-0-64 64 Channel (all analog input)

Digital boards can be congured individually or grouped to share a single ground and use

common lter settings and sampling rate.

Channel

numbering

digital

input

banks

can

non-sequential

when

sampling

kHz.

See

Sampling

Rate

and Digital Input Channels

Note

PZ5 NeuroDigitizer | 8

Two Possible Logical Amplier Congurations for a PZ5-64-2 (with two digital inputs)

Logical amplier congurations can be dened using the front panel interface (see PZ5

Touchscreen), in Synapse, or in RPvdsEx using the PZ5_Control macro. The PZ5-0-32 model

can have a maximum of two logical ampliers congured. All other PZ5s can have a maximum

of four logical ampliers.

Analog Recording Reference Modes

The PZ5 supports four referencing modes for each analog input logical amplier: Local,

Shared, None and Differential. See Pinout Diagrams.

Reference

Mode

Description

Local Each bank of channels in a logical amplier uses its own reference input (pin 5) as the reference for

that bank

Shared The reference (pin 5) of the rst bank of the logical amplier acts as a reference for all banks in the

logical amplier

None The references for all banks of a logical amplier are tied to the Ground (pins 13, 15, and 16).

Differential The inputs in each bank of the logical amplier are paired; odd channels serve as recording (+)

channels and each even channel is used as an individual reference (-) channel for the preceding odd

channel. No connections should be made to pin 5.

PZ5 NeuroDigitizer | 9

Sampling Rate and Onboard Filters

The sampling rate of each logical amplier is adjustable (max 50 kHz, min 750 Hz) and should

be set to a value appropriate for the signal of interest. Reducing the sampling rate when

acquiring low-frequency analog signals yields higher bit resolution and improved signal-to-

noise. Use the Amp Type Presets as a guide for determining what sampling rate to use for

each logical amplier.

The onboard down-sampling lters are used to further reduce the noise from frequencies

above the band of interest and can be set to a percentage of the sampling rate (max 45%, min

10%). Adjusting the sampling rate and lter for each logical amplier to match your desired

signal gives you the best possible signal delity.

Sampling Rate and Digital Input Channels

When a logical amplier contains digital inputs, the sampling rate should be set to a value

appropriate for the connected Intan amplier board. Sampling rates at or above 50 kHz reduce

the number of channels available on the amplier boards.

At 50 kHz the 32 channel amplier board is limited to 20 channels and the 64 and 128 channel

boards are limited to 40 channels, at the time of this writing. The maximum aggregate number

of channels is 256 channels at up to 25kHz, or 128 channels at up to 50kHz.

It is also important to note that, while the Intan board channel numbers are normally sequential

and offset by the number of analog inputs in the amplier, sampling at or above 50 kHz may

also affect channel numbering.

At 50 kHz the native channel numbers per board are 1-20 and 33-52. These channel numbers

are then offset by the number of channels existing in the lower banks of the PZ5. Also see

Input Connectors.

PZ5 NeuroDigitizer | 10

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