The PScan2T SPM Controller

Our unique system combines the convenience of a WindowsT user interface with real-time control of microscope operations through an Ethernet connection. No more expensive DSP boards that may become obsolete tomorrow!

Because of its unique design, the PScan2T controller is ideally suited for developing advanced probe microscope instrumentation including atomic force, scanning tunneling and near field optical microscopes.
The PScan2T controller is appropriate for use by instrument companies that want to create their own scanning probe microscope products or as an add-on feature to an existing product.

The hardware in the PScan2T is designed for maximum speed and flexibility. All high voltage signals are isolated from digital signals for optimal low noise performance. Functions supported by the PScan2T controller include:

X-Y Raster:
Support is provided for tripod scanners with or without external linearization. Tube scanners can be controlled with the optional high voltage board.

Z Feedback:
A digitally controlled high speed analog PID controller optimizes the control of the Z feedback loop in all scanning probe instruments. Force/distance curves are also possible by disabling the Z feedback control.

Modulation:
An internal 32-bit sinusoidal function generator and amplitude detector are available for techniques such as non-contact FM and shear force NSOM measurements.

Sensor inputs:
Support is provided for 4 quadrant photo-detectors used in most AFM heads. Additionally, the sensor output from STM and NSOM heads can be directly input into the PScan2T controller.

Motor Controls:
For Z approach, both DC and stepper motor controllers are available. Additionally, seven stepper motor controllers are available for sample stages and other control functions.

Head Support:
Flags and control lines are available for turning lasers on and off in AFM heads and monitoring feedback signals.

Digitally Programmed Analog Output:
For creating new applications such as electrochemistry, two additional 12 bit analog outputs are provided.

Additional I/O Support:
Additional I/O support is available through a 16 bit TTL bus. This bus can be used for additional ADC or DAC's to the PScan2T controller.