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Features of the OC4-Station
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State-of-the-Art Hardware |
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The Nanonis Oscillation Controller has the lowest noise input: a differential input buffer, variable gain preamplifier, signal filters and a 14-bit ADC @ 40MS/s forms a state-of-the-art input stage for any dynamic AFM modes. Frequency stability of 1ppb is guaranteed by an on board OCXO and frequency resolution is arbitrary low at 1nHz through a Direct Digital Synthesizer (DDS). |
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OC4 Interface |
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The OC4 interface is intended to work with any third party controller. All internally calculated channels can be sent out simultaneously via the many user and monitor BNC outputs. Two outputs are user configurable for SafeTip signal or Bias voltage for Kelvin probe for instance. Triggering and synchronization with respect to the drive signal can be done through two digital lines on BNC. |
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Extremely Wide Input Range |
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With its Variable Gain Amplifier (VGA) and a 1/10 divider, the OC4 allows an extremely wide input range from sub-mV up to ±10V. This Input Range has an associated calibration unit with every gain controllable through the Oscillation Controller Module in the Nanonis software. |
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Selectable Output Range |
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Excitation output range can be selected from 4 different settings, from ±10mV up to ±10V. This allows optimal operation of the mechanical resonator depending on the type of application, particularly between ambient and UHV conditions where the Q factor changes drastically and necessitates completely different drive amplitude. |
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Optimized Feedback Loops: perfectPLL |
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The perfectPLL set-up tool determines optimal feedback parameters of both Amplitude and Phase loops. This ensures perfect operation of the PLL with no ringing or slow feedback behavior. All relevant parameters are measured and applied automatically in the Frequency Sweep module, leaving the user only with the demodulation bandwidth to chose from a few Hz up to 5kHz (i.e. trade-off between speed & resolution). |
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Feedback Error Signal |
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A dedicated feedback signal module allows the user to freely configure which error signal to use for any third party controller. Many parameters such as: error signal, recovery time, threshold condition, SafeTip level are all user definable. The user can either output the direct signal or subtract to it a set-point value to feed directly an error signal like it is required with the Omicron Scala for instance. |
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Signal Analyzer up to 5MHz |
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The OC4 integrates many noise and analysis tools such as a powerful 5MHz signal analyzer (FFT) to visualize in the frequency domain the resonance frequency of the cantilever and its higher modes. A zoom-FFT feature allows more refine analysis with for instance thermal peak analysis. |
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Improved Atomic Scale Contrast via Bimodal DFM: DUAL OC4
New application note on the use of two PLL-s to simultaneously excite and control two flexural modes of an AFM cantilever.
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KolibriSensor New Brochure
Download the new KolibriSensor brochure for a detailed description of its remarkable specifications.
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