Multichannel Systems nanoZ manual - Manual (Page 29)

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selectchannel
Selects a channel to perform impedance measurement or electroplating on.
Usage: nanoz(‘selectchannel’, handle, channel);
Arguments: handle - handle of an opened device returned by the open function;
channel – channel number to select, from 1 to 64, or 0 to de-select all channels.
Return values: none.
Remarks: This function connects the measurement circuit to a specific channel.
Prior to switching channels any impedance measurement or electroplating that
was in progress is automatically stopped. Channel switching may cause a
transition on the measurement circuit that lasts about 0.5 seconds. To preserve
accuracy impedance measurement is not recommended during this period.
After switching channels, the circuit is put into passive mode, not applying any
voltage or current to the target electrode.
setfreq
Sets the test frequency used for impedance measurement.
Usage: [freq_achieved, fs] = nanoz(‘setfreq’, handle, freq_desired);
Arguments: handle – handle to an opened device returned by the open function;
freq_desired – The desired test frequency, in Hz. Range
Return values: freq_achieved – The frequency, in Hz, which can be generated by
the device, as close as possible to the desired frequency, and on which the
actual measurement will be performed.
fs – optional return value. It receives the sampling frequency used for signal
measurement.
Remarks: This function prepares the device for impedance measurement. During
measurements, the nanoZ applies a sinusoidal current on the target electrode
and records the voltage across at the sampling frequency returned by the fs
output argument.
startimpmetering
Starts impedance measurement.
Usage: nanoz('startimpmetering’, handle, nsam_measure, numdsps);