MTS Series 793 - Manual (Page 101)

How to Perform Advanced Tuning Techniques
MTS Series 793 Tuning and Calibration Tuning Procedures 101
3. In Station Setup, click the Channel Drive icon to display the Drive panel,
and then click the Conditioner tab.
4. From the Service Port Output, select one of signals described in the
following Service Port Output Signals list.
Note The Spool Position signal is available to the digital meters or software
scope.
Monitoring inner-loop
signals on FlexTest IIm
Controllers
Inner-loop signals can be monitored with external meters via the tip jacks on the
Model 497.15 3-Stage Valve Driver module. You must specify which signal is
available from the tip jacks with the Monitor Mux Output list.
Service Port Output Signals
S IGNAL D ESCRIPTION
Valve Current The final output to the servovalve. The
voltage represents the current output
[10 V (DC) = 50 mA; standard].
Demod Filter Output The analog output of the demodulator
prior to gain.
Innerloop Command The input signal to the 3-Stage Valve
Driver (the test program command).
Spool Position The Conditioner Out signal summed
with the Spool Zero signal.
Spool Offset Signal that is summed with spool position
to remove any DC offset. ±10 V
represents ±4 V of zero summing.
Preamp Output The raw AC input from the spool LVDT.
Conditioner Out The conditioned feedback signal from the
servovalve LVDT.
Voltage Reference (5V) Internal board reference test only.