Device Node Tree

Defines the number of samples on the input to average as a power of two. Possible values are in the range [0, 16]. A value of 0 corresponds to the sampling rate of the auxiliary input’s ADC.

Voltage measured at the Auxiliary Input after averaging. The data rate depends on the averaging value. Note, if the instrument has demodulator functionality, the auxiliary input values are available as fields in a demodulator sample and are aligned by timestamp with the demodulator output.

Voltage measured at the Auxiliary Input after averaging. The value of this node is updated at a low rate (50 Hz); the streaming node auxins/n/sample is updated at a high rate defined by the averaging.

Select the channel number of the selected signal source.

Lower limit for the signal at the Auxiliary Output. A smaller value will be clipped.

Upper limit for the signal at the Auxiliary Output. A larger value will be clipped.

Add the specified offset voltage to the signal after scaling. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset

Select the signal source to be represented on the Auxiliary Output.

Add a pre-offset to the signal before scaling is applied. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset

Multiplication factor to scale the signal. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset

Enable the Tip Protect unit.

Select the active level of Source signal.

Select the input source for Tip Protect.

Signal value written to the Aux Output port when Tip Protect is active. The value overwrites Aux Output Internal value and the Lower and Upper Limits.

Voltage present on the Auxiliary Output. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset

Returns the internal clock frequency of the device.

Automatic adjustment of the Range to about two times the maximum current input amplitude measured over about 100 ms.

Switches the input between floating (ON) and connected grounds (OFF). This setting applies both to the voltage and the current input. It is recommended to discharge the test device before connecting or to enable this setting only after the signal source has been connected to the Signal Input in grounded mode.

Gives the maximum measured input current (peak value) normalized to input range.

Gives the minimum measured input current (peak value) normalized to input range.

Enables the current input.

Defines the gain of the current input amplifier. The range should exceed the incoming signal by roughly a factor of two including a potential DC offset. The instrument selects the next higher available range relative to a value inserted by the user. A suitable choice of this setting optimizes the accuracy and signal-to-noise ratio by ensuring that the full dynamic range of the input ADC is used.

Switches to the next appropriate input range such that the range fits best with the measured input current.

Applies the given scale factor to the current input.

Selects the input signal for the demodulator.

Enables the data acquisition for the corresponding demodulator. Note: increasing number of active demodulators increases load on the physical connection to the host computer.

Indicates the frequency used for demodulation and for output generation. The demodulation frequency is calculated with oscillator frequency times the harmonic factor. When the MOD option is used linear combinations of oscillator frequencies including the harmonic factors define the demodulation frequencies.

Multiplies the demodulator’s reference frequency by an integer factor. If the demodulator is used as a phase detector in external reference mode (PLL), the effect is that the internal oscillator locks to the external frequency divided by the integer factor.

Selects the filter roll off between 6 dB/oct and 48 dB/oct.

Connects the demodulator with the supplied oscillator. Number of available oscillators depends on the installed options.

Adjust the demodulator phase automatically in order to read 0 degrees.

Phase shift applied to the reference input of the demodulator.

Defines the demodulator sampling rate, the number of samples that are sent to the host computer per second. A rate of about 7-10 higher as compared to the filter bandwidth usually provides sufficient aliasing suppression. This is also the rate of data received by LabOne Data Server and saved to the computer hard disk. This setting has no impact on the sample rate on the auxiliary outputs connectors. Note: the value inserted by the user may be approximated to the nearest value supported by the instrument.

Contains streamed demodulator samples with sample interval defined by the demodulator data rate.

Enables the sinc filter. When the filter bandwidth is comparable to or larger than the demodulation frequency, the demodulator output may contain frequency components at the frequency of demodulation and its higher harmonics. The sinc is an additional filter that attenuates these unwanted components in the demodulator output.

Sets the integration time constant or in other words, the cutoff frequency of the demodulator low pass filter.

Selects the acquisition mode (i.e. triggering) of the demodulator.

Not used. Reserved for future use.

Sets the decimation factor for DIO data streamed to the host computer.

When on (1), the corresponding 8-bit bus is in output mode. When off (0), it is in input mode. Bit 0 corresponds to the least significant byte. For example, the value 1 drives the least significant byte, the value 8 drives the most significant byte.

Select DIO internal or external clocking.

Gives the value of the DIO input for those bytes where drive is disabled.

Select DIO mode

Sets the value of the DIO output for those bytes where 'drive' is enabled.

Indicates the input signal selection for the selected demodulator.

This defines the type of automatic adaptation of parameters in the PID used for Ext Ref.

Indicates the demodulator connected to the extref channel.

Enables the external reference.

Indicates whether the external reference is locked.

Indicates which oscillator is being locked to the external reference.

Node providing a mechanism to write feature codes.

Returns the device type.

Returns enabled options.

Device serial number.

Defines the input coupling for the Signal Inputs. AC coupling inserts a high-pass filter.

Enable automatic bandwidth control. If enabled the optimum bandwidth is calculated based on the frequency and measurement data.

Select input range control mode.

If enabled, the drive voltage amplitude is controlled by the device. If disabled it can be set manually.

Indicates disabled periodic auto range control. A running sweeper module takes over the range control and thus disables the periodic range checks.

Enables the DC bias voltage.

DC bias voltage applied across the device under test. Both positive and negative bias voltages are supported. In a 4-terminal measurement, the bias voltage is limited by the maximum common voltage input range of the device. In a 2-terminal measurement, the bias voltage can be larger because the voltage inputs are not connected.

Indicates if the internal calibration is applied to the measurement data.

Enables the internal calibration. This ensures that the input range gains match over the full frequency range. With enabled internal calibration the device fulfills the impedance accuracy specification. The internal calibration is a prerequisite to apply a user compensation.

Enables smoothing of the internal calibration data. This results in lower noise in the measured data.

Indicates that a valid user compensation is active. If active the impedance data streams deliver amplitude and phase corrected data based on the impedance user compensation.

Enables the user compensation of the impedance data. The user compensation is correcting parasitics and delays caused by the external setup. The user compensation is applied on top of the internal impedance calibration.

Enables smoothing of the compensation data. This results in lower noise in the measured data.

Enables the indication of strong compensation in the plots. A strong compensation diminishes the measurement accuracy of the parameter.

Strength of the compensation that will trigger the strong compensation warning.

Enables/disables all confidence indicators to check the reliability of the measured data. To enable individual indicators, open the advanced tab.

Enables the frequency limit detection based on the used current input range. Only relevant when Range Control is set to Manual.

Enables a warning when measuring a low impedance (100k) with a 2 point contact.

When measuring with 2 point contacts, too low impedance of DUT will trigger the Low DUT 2T warning.

Enables the detection of unreliable data points where data sample loss leads to an invalid one-period average. Try reducing the data transfer rate.

Enables the open terminal detection for 4-terminal measurements.

Open terminal detection ratio. An open terminal is reported if the excitation calculated from current and voltage drop differs more than the specified factor from the driving voltage.

Enables the overload detection for current and voltage.

Enables the detection of negative Q or D factors. Negative Q or D factors mean the measured impedance does not correspond to the chosen Representation. This can be due to an erroneous compensation, a bad choice of the Representation, or noise.

The Suppression Confidence Indicator indicates if one of the two parameters of a circuit representation cannot be calculated reliably from the measured impedance. This is the case if a small variation in one (dominant) representation parameter creates a strong variation of the other (suppressed) representation parameter. Such an error amplification indicates that the measurement of the secondary parameter is unreliable.

Error amplification limit for which a secondary parameter is marked unreliable. Larger gain values mean larger warning tolerances. A gain value between 10 and 100 is best.

Enables the underflow detection for current and voltage.

The underflow condition is met if the measured amplitude is lower than the specified ratio relative to full scale.

Demodulator used for current demodulation.

Select the current input used for two- and four-terminal impedance measurements.

If enabled, the current input signal is inverted. This is useful to switch the polarity of an input signal which can be caused by additional current amplifiers.

If enabled, the PID value is used for the impedance calculation instead of the measured value at the current input.

Input current range used for the impedance measurement. Small current input ranges have a reduced bandwidth. In the Range Control modes 'Auto' and 'Impedance', the current range is switched automatically to a higher range if the frequency is too high.

The scaling factor will be applied to the current measurement done with an Aux In input.

Multiplies the demodulator’s reference frequency with the integer factor defined by this field.

Selects the filter roll off between 6 dB/oct and 48 dB/oct of the current demodulator.

Oscillator used to generate the frequency of the excitation voltage on the Hcur (+V) connector.

Impedance data streaming rate. The same data rate is applied to the demodulators that are used for the impedance measurement.

Enables the sinc filter.

Defines low pass filter time constant.

Discarding impedance samples outside the indicated range.

Threshold for abs(Z) below which the impedance samples are discarded.

Threshold for abs(Z) above which the impedance samples are discarded.

Enable impedance calculation for demodulator data.

Frequency control for the oscillator used for impedance measurement.

Select the interpolation method of the compensation data. The interpolation method is particularly important if the derivative changes strongly e.g at cut-off frequencies.

Limit of the maximum bandwidth used on the demodulator filter. Values above 1 kHz can heavily diminish measurement accuracy in the high-frequency region where the amplitude is no more constant over frequency.

Select impedance measurement mode.

Representation of the complex impedance value Z by two real values accessible as Parameter 1 and Parameter 2 on all user interface displays.

The area of the MUT. Only relevant when using the dielectric model.

The thickness of the MUT. Only relevant when using the dielectric model.

Suppression of the omega and 2-omega components. Small omega suppression can diminish measurements of very low or high impedance because the DC component can become dominant. Large omega suppression will have a significant impact on sweep time especially for low filter orders.

Enables one-period averaging for low frequency impedance measurements. The LED is green when active.

Enables one-period averaging for low frequency impedance measurements. The LED is green when active.

Drive amplitude on the Signal Output.

Demodulator unit used to generate the excitation voltage on the Signal Output.

Main switch for the Signal Output corresponding to the blue LED indicator on the instrument front panel.

Selects the output voltage range.

Selects the output channel that the excitation voltage drives.

Streaming node containing the impedance measurement sample data.

Demodulator used for voltage measurement in case of a four-terminal impedance measurement.

Select the voltage input used for a four-terminal impedance measurement.

If enabled, the voltage input signal is inverted.

Input voltage range for the impedance measurement.

The scaling factor will be applied to the voltage measurement done with an Aux In input.

Set the carrier amplitude

Enable the modulation

Set the harmonic of the carrier frequency. 1 = Fundamental

Select Signal Input for the carrier demodulation

Filter order used for carrier demodulation

Select the oscillator for the carrier signal.

Phase shift applied to the reference input of the carrier demodulator and also to the carrier signal on the Signal Outputs

Sets the integration time constant or in other words, the cutoff frequency of the low-pass filter for the carrier demodulation.

Enables the modulation.

FM mode peak deviation value.

In FM mode, choose to work with either modulation index or peak deviation. The modulation index equals peak deviation divided by modulation frequency.

FM modulation index: The modulation index equals peak deviation divided by modulation frequency.

Select the modulation mode.

Select Signal Output.

Set the amplitude of the sideband components.

Enable the signal generation for the respective sideband

Set harmonic of the sideband frequencies. 1 = fundamental

Select Signal Input for the sideband demodulation

Enabling of the first sideband and selection of the position of the sideband relative to the carrier frequency for manual mode.

Filter order used for sideband demodulation

Select the oscillator for the second sideband.

Phase shift applied to the reference input of the sideband demodulator and also to the sideband signal on the Signal Outputs

Sets the integration time constant or in other words, the cutoff frequency of the low-pass filter for the sideband demodulation.

Frequency control for each oscillator.

Sets the center value for the PID output. After adding the Center value, the signal is clamped to Center + Lower Limit and Center + Upper Limit.

PID derivative gain.

Indicates the signal source which is connected to the chosen input demodulator channel.

Multiplier of the for the reference frequency of the current demodulator.

Selects the filter roll off between 6 dB/oct and 48 dB/oct of the current demodulator.

Defines the characteristic time constant (cut off) of the demodulator filter used as an input.

The cutoff of the low-pass filter for the D limitation given as time constant. When set to 0, the low-pass filter is disabled.

Enable the PID controller.

Error = Set point - PID Input.

PID integral gain I.

Select input source of PID controller.

Select input channel of PID controller.

If enabled, the accumulated integral error is maintained upon restart of the PID. If is disabled, the integral error is set to zero when the PID is disabled.

Sets the lower limit for the PID output. After adding the Center value, the signal is clamped to Center + Lower Limit and Center + Upper Limit.

Sets the upper limit for the PID output. After adding the Center value, the signal is clamped to Center + Lower Limit and Center + Upper Limit.

Sets the operation mode of the PID module.

Select output of the PID controller.

Select the output channel of the driven output of PID controller.

PID Proportional gain P.

Enables the phase unwrapping to track phase errors past the +/-180 degree boundary and increase PLL bandwidth.

This defines the type of automatic adaptation of parameters in the PID.

Indicates when the PID, configured as PLL, is locked.

PID sampling rate and update rate of PID outputs. Needs to be set substantially higher than the targeted loop filter bandwidth.

PID controller setpoint

Enables the setpoint toggle.

Defines the rate of setpoint toggling. Note that possible values are logarithmically spaced with a factor of 4 between values.

Defines the setpoint value used for setpoint toggle.

Difference between the current output value Out and the Center. Shift = P*Error + I*Int(Error, dt) + D*dError/dt

Current rate of the PID stream data sent to PC. Defined based on Max Rate.

PID Error = Set point - PID Input.

Indicates the streaming fifo overflow state. 0 = OK, 1 = overflow.

Target Rate for PID output data sent to PC. This value defines the applied decimation for sending data to the PC. It does not affect any other place where PID data are used.

Gives the difference between the current output value and the center value. Shift = P*Error + I*Int(Error, dt) + D*dError/dt

Gives the current PID output value.

Gives the current PID output value.

Activates the scope channels.

Selects between sample decimation and sample averaging. Averaging avoids aliasing, but may conceal signal peaks.

Indicates the full scale value of the scope channel.

Selects the scope input signal.

Lower limit of the scope full scale range. For demodulator, PID, Boxcar, and AU signals the limit should be adjusted so that the signal covers the specified range to achieve optimal resolution.

Upper limit of the scope full scale range. For demodulator, PID, Boxcar, and AU signals the limit should be adjusted so that the signal covers the specified range to achieve optimal resolution.

Indicates the offset value of the scope channel.

Enables the acquisition of scope shots.

Defines the length of the recorded Scope shot in number of samples.