TDT PZ5, Hardware Reference Manual, Page: 10 / 29

Sampling Rate and Onboard Filters
The sampling rate of each logical ampli fi 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 fi er.
The onboard down-sampling fi 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
fi lter for each logical ampli fi er to match your desired
signal gives you the best possible signal fi delity.
Sampling Rate and Digital Input Channels
When a logical ampli fi er contains digital inputs, the sampling rate should be set to a value
appropriate for the connected Intan ampli fi er board. Sampling rates at or above 50 kHz reduce
the number of channels available on the ampli fi er boards.
At 50 kHz the 32 channel ampli fi 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
fi 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