Auxiliary Tab¶

The Auxiliary tab provides access to the settings of the Auxiliary Inputs and Auxiliary Outputs; it is available on all MFIA instruments.

Features¶

Monitor signal levels of auxiliary input connectors
Monitor signal levels of auxiliary output connectors
Auxiliary output signal sources: Demodulators and manual setting
Define Offsets and Scaling for auxiliary output values
Control auxiliary output range limitations

Description¶

The Auxiliary tab serves mainly to monitor and control the auxiliary inputs and outputs. Whenever the tab is closed or an additional one of the same type is needed, clicking the following icon will open a new instance of the tab.

The Auxiliary tab (see Figure 1) is divided into three sections. The Aux Input section gives two graphical and two numerical monitors for the signal amplitude applied to the auxiliary inputs on the back panel. In the middle of the tab the Aux Output section allows to associate any of the measured signals to one of the 4 auxiliary outputs on the instrument front panel. With the action buttons next to the Preoffset and Offset values the effective voltage on the auxiliary outputs can be automatically set to zero. The analog output voltages can be limited to a certain range in order to avoid damaging the parts connected to the outputs.

Note

Please note the change of units of the scaling factor depending on what
measurement signal is chosen.

Two Aux Output Levels on the right provides 4 graphical and 4 numerical indicators to monitor the voltages currently set on the auxiliary outputs.

Functional Elements¶

Table 2: Auxiliary tab
Control/Tool	Option/Range	Description
Auxiliary Input Voltage	-10 V to 10 V	Voltage measured at the Auxiliary Input.
Signal		Select the signal source to be represented on the Auxiliary Output.
	X	Select the demodulator X component for auxiliary output.
	Y	Select the demodulator Y component for auxiliary output.
	R	Select the demodulator magnitude component for auxiliary output.
	Θ	Select the demodulator phase component for auxiliary output.
	PID Out	Select one of the PID controllers output. MF-PID option needs to be installed.
	PID Shift	Select one of the PID controllers' shift signal. MF-PID option needs to be installed.
	PID Error	Select one of the PID controllers' error signal. MF-PID option needs to be installed.
	TU Filtered Value	Select one of the Threshold unit input signals after filtering for auxiliary output.
	TU Output Value	Select one of the Threshold unit output signals for auxiliary output.
	Manual	Manually define an auxiliary output voltage using the offset field.
Channel	index	Select the channel according to the selected signal source.
Preoffset	numerical value in signal units	Add a pre-offset to the signal before scaling is applied. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset
Auto-zero		Automatically adjusts the Pre-offset to set the Auxiliary Output Value to zero.
Scale	numerical value	Multiplication factor to scale the signal. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset
Auto-zero		Automatically adjusts the Offset to set the Auxiliary Output Value to zero.
Offset	numerical value in Volts	Add the specified offset voltage to the signal after scaling. Auxiliary Output Value = (Signal+Preoffset)*Scale + Offset
Lower Limit	-10 V to 10 V	Lower limit for the signal at the Auxiliary Output. A smaller value will be clipped.
Upper Limit	-10 V to 10 V	Upper limit for the signal at the Auxiliary Output. A larger value will be clipped.
Enable	ON / OFF	Enable Tip Protect unit.
Polarity	ON / OFF	Select the active level of Source signal.
Source		Select the input source for Tip Protect.
	Threshold Unit 1	Output value of the TU logic unit 1.
	Threshold Unit 2	Output value of the TU logic unit 2.
	Threshold Unit 3	Output value of the TU logic unit 3.
	Threshold Unit 4	Output value of the TU logic unit 4.
Value		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.
Value	-10 V to 10 V	Voltage present on the Auxiliary Output port. The value is obtained by clamping the calculated signal (Signal+Preoffset)*Scale + Offset based on Lower and Upper Limits. It is overwritten when Tip Protect is active.