9. Increased Slope Compensation Range: The sensitivity of X and Y slope compensation has been
greatly increased. The controls still accept a decimal value between -1.000 and 1.000.
10. Z Piezo Sensitivity Polarity Controls Z Output Polarity: The Z Output Polarity is now controlled by the
Z Piezo Sensitivity Polarity. Rather than setting the Z to Invert and not Sum, it’s simpler to put in a
negative piezo sensitivity, if it is so required.
11. Calibrations Can be Configured on the Fly: now the piezo calibration factors may be changed while
initialized; previously it was necessary to shut down first. Note: the Z-PI Tip Control must be set to
Freeze or Center such that a large fast voltage swing is not applied to the Z-scan.
12. New Filters for High Speed Inputs: Low Pass Filters 0 and 1 were added, which are one-pole
Butterworth filters that are configurable at 250, 500, 1000, 2000, and 4000 Hz. Simply connect in
hardware space the ADC to the Low Pass Filter (CH1 LP0) and (CH2 LP1) and a dropdown box
may be selected at the desired cutoff frequency.
13. Untangled Lock-ins from Inputs: previously Lock-in 0 was tied to ADC CH1 and Lock-in 1 to CH2.
Now CH1 or CH2 can feed either of the lock-ins, or one channel can feed both (for example looking at
multiple harmonics).
14. New CH5 ADC: The CH5 input can accept +/- 10 V signals. It has no offset DAC and no Dashboard
controls.
15. New Status ADCs: Four status ADC inputs have been added, which are useful for reading segment
voltages on a PSD. They can also be used like any other ADC or as general purpose differential inputs
with a range of +/- 0.5 V.
16. Additional Feedback Loops: Aux and Kelvin. The Aux PI Loop is typically used for inteferometric
feedback, but can be used for general purposes as well. The Aux can vary high voltage DACs to
maintain setpoint of the ADC, but the Kelvin can only vary the CH1 and CH2 Drive signals for its setpoint
(as Kelvin Force is typically varying the bias voltage, which is on one of these channels).
17. Added Pulse Counting Inputs: 100 MHz pulse counters were added that can accept an input of 0.0-
3.3 V; pulse inputs are 50-Ohm terminated.
18. Added Hardware Watchers: The Hardware watcher allows the R9 to monitor many of the internal
signals and anticipate potential problems. An example of this being Lockguard, which can be set to
retract the tip if the PLL loses lock for any reason. The time constant associated with Lockguard making
this ‘decision’ would be 10 nanoseconds and not limited by the much slower filters of the PLL.
19. Fast Sweep Aborts: this uses a Hardware Watcher to monitor an input channel and abort if a
specified threshold range is exceeded.
20. Yes/No Message Boxes: Allows procedures to message the user for a real-time decision.
21. Feedback Mode Switching now remembers the previous Integral and Proportional gains that were
used. This is convenient and a nice safety feature because the different feedback modalities typically
have gains that are orders of magnitude different from one another.
22. Multiple R9 Controls in a State: IHL construction is much easier due to changes in the ways that the
IHLs can be wired. Now, any number of different R9 controls can be ramped in a given state.
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