PZ Block Diagrams, showing a single amp (left) and sub amps (right).
The PZ amplifier HAL reads data from a connected PZn amplifier. The options vary for each amplifier model. The PZ5 amplifier can have up to four logical sub amps; each sub amp is individually configurable and forms a multi-channel floating point data sources that can be linked to other gizmos. All other PZs have one multi-channel floating point data source.
PZ5 Analog and Digital Options.
'Auto' low pass filter settings for different sub amp sampling rates
See the PZ5 section of the System 3 Manual for more information about configuring and using the PZ5 amplifier.
PZ2 / PZ3/ PZ4 Options
See the PZ3 section of the System 3 Manual for more information about the operational modes of the PZ3 amplifier.
When Impedance Check is checked, a user interface appears at runtime.
The PZ5 tab provides an interface for impedance checking on all channels. The display represents the stimulation channels divided into banks of eight channels, broken up by sub-amplifier.
The dropdowns at the top define which type of inputs to check and the probe frequency. If a reference electrode is used in the subamp configuration, an LED for the reference is shown with that subamp and it is an available test option. If there are more than one type of input, 'Auto' loops through all of them during the impedance check.
Running the Impedance Check
Run an impedance check on selected sub-amplifier. The PZ5 enters impedance check mode and the values are displayed on the interface.
Check All. Run an impedance check on all sub-amps as described above.
Stop Checking. Stops the impedance checking prematurely.
Results of impedance check are indicated by color: below low impedance threshold (green), above high impedance threshold (red), between low and high impedance thresholds (yellow). The actual impedance values (in kOhm) are displayed beneath each indicator.