OC6 Oscillation Controller

The unique, all-in-one tool designed to meet the most demanding requirements in AFM measurements

The OC6 is a state-of-the-art signal generator offering 5 × the bandwidth of the OC4, generating small amplitude signals up to 100 MHz. Its redesigned output signal path features fully digital amplitude control, improved linearity, and signal purity. User-selectable ranges and filters reduce broadband noise for uncompromised performance down to DC. The high-current output stage is bypassable, lowering noise to less than 5 nV/sqrt(Hz).

Additionally, the OC6 is a sophisticated digitizer featuring a DC-coupled, high-impedance, fully differential input stage, handling signals from DC to 25 MHz (or even 100 MHz) with high accuracy. It achieves 5 × less noise than its predecessor, a significantly lower 1/f corner frequency, and lower distortion. This all-in-one tool excels in demanding AFM measurements and beyond.

KEY FEATURES

Capable of generating small amplitude signals up to 100 MHz, providing 5 × the bandwidth compared to the OC4
Improved linearity, signal purity, and fully digital amplitude control, with user-selectable ranges and filters
Bypassable high-current output stage, effectively lowering noise to less than 5 nV/sqrt(Hz)
Features a DC-coupled high-impedance, fully differential input stage for signals from DC to 25 MHz or even 100 MHz with the highest accuracy
5 × less noise than its predecessor, a significantly lower 1/f corner frequency, and lower distortion

MADE FOR THESE METHODS
SPECIFICATIONS
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MADE FOR THESE METHODS

SPM, STM, AFM

Scanning Probe Microscopy are methods using a probe, that interacts with a surface producing high resolution images by surface scanning of the probe

SPECIFICATIONS

OC6 Oscillation Controller

Performance

Input	___
Hardware interface	2 × BNC connectors, differential or single-ended
Differential input voltage range	±10 V, ±3.3 V, …, ± 1 mV (gain 0.1, 0.3, …, 1000)
Input impedance	50 Ω, 100 MΩ, > 1 GΩ, DC-coupling 50 Ω, 10 MΩ, AC-coupling user configurable
Input capacitance (single-ended)	15 pF (low-capacitance mode) 40 pF (low-noise mode)
Input bias current (single-ended, input A, 60 °C)	< 35 pA typ. (low-capacitance mode) < 140 pA typ. (low-noise mode)
Input coupling	DC or AC, user-configurable
Analog bandwidth	DC-25 MHz, -5 MHz, -500 kHz (-3 dB), 3rd order Bessel lowpass filters, user selectable
AD-converter	DC-25 MHz, -5 MHz, -500 kHz (-3 dB), 3rd order Bessel lowpass filters, user selectable
Effective resolution	> 17 bit with > 256 × oversampling, 1 – 10 V range
INL / DNL	±1.6 LSB / ±0.4 LSB typical
Input noise density in 10 mV range or lower, low-noise, single-ended	< 3.5 nV/√Hz > 100 kHz < 15 nV/√Hz @ 100 Hz
Measurement noise up to 500 kHz, lownoise, single-ended, 128 × oversampling	< 22 μVrms, 1 V range < 2.5 μVrms, 10 mV range or lower
Measurement noise up to 100 MHz, lownoise, single-ended, no oversampling	< 170 μVrms, 1 V range < 28 μVrms, 10 mV range or lower
SFDR, 50 % amplitude signal, 1 kHz	> 70 dB, 10 V range > 90 dB, 1 V range
Output	___
Hardware interface	1 × BNC connector
Output voltage range	±10 V, ±1 V, ±100 mV, ±10 mV
Output current range	±200 mA max. (high current) ±100 mA max. (low noise)
Output impedance	50 Ω
Analog bandwidth	DC-25 MHz, -5 MHz, -500 kHz (-3 dB), 3rd order Bessel lowpass filters, user selectable
DA-converter	16-bit DAC, 200 MS/s
INL / DNL	< ±1 LSB / ±0.5 LSB typical
Output noise density ±10 V range, high current	< 60 nV/√Hz > 10 kHz < 800 nV/√Hz @ 10 Hz
Output noise density ±1 V range, high current	< 25 nV/√Hz > 10 kHz < 250 nV/√Hz @ 10 Hz
Output noise density ±1 V range, low noise	< 7 nV/√Hz > 10 kHz < 70 nV/√Hz @ 10 Hz
Output noise density ±10 mV range, low noise	< 5 nV/√Hz > 10 kHz < 25 nV/√Hz @ 10 Hz
Output noise up to 500 kHz, low-noise (high-current)	< 55 μVrms (< 65 μVrms), ±10 V range < 6 μVrms (< 15 μVrms), ±1 V range < 3.5 μVrms (< 14 μVrms), ±10 mV range
Output noise up to 100 MHz, low-noise (high-current)	< 55 μVrms (< 240 μVrms), ±10 V range < 55 μVrms (< 65 μVrms), ±1 V range < 55 μVrms (< 62 μVrms), ±10 mV range
Output noise 0.1 Hz – 10 Hz, low-noise (high current)	< 5 μVrms (< 6.5 μVrms), ±10 V range < 0.6 μVrms (< 1.8 μVrms), ±1 V range < 0.2 μVrms (< 1.5 μVrms), ±10 mV range
Digital lines	___
Ports	2 × 8 bidirectional lines on two D-sub 9 female connectors for each signal interface
Signal	3.3 V TTL, max. 25 mA per line
Maximum sampling frequency	250 kHz – 1 MHz depending on configuration
High speed digital lines	___
Ports	2 × inputs and 2 × outputs on SMB male connectors for each signal interface
Signal	3.3 V TTL, max. 24 mA per line
Maximum sampling frequency	200 MHz
Clock	___
Ports	1× input, 1× output for active clock source
Frequency	10 MHz, 100 MHz input, 10 MHz,100 MHz, 1 GHz output square wave, 3.3 V
Frequency calibration	±25 ppm (standard VCXO) ±1 ppm (optional OCXO)
Frequency stability vs. temperature	±15 ppm (standard VCXO) ±20 ppb (optional OCXO)
Graphical user interface	___
Operating system	Windows 11 64-bit
Signal	___
Signals	128 x physical signals (inputs, outputs at 1 MS/s) 8 x inputs and 8 x outputs at 200 MS/s 200 x internal signals
Simultaneous signals	24 x data acquisition 8 x for 1 MS/s data streaming 4 x for 2 MS/s burst acquisition 24 x for real-time data logging
Data transfer	Via TCP/IP, 2 kS/s default, up to 20 kS/s, 1 MS/s × 8 channels for data streaming
* Specifications are subject to change without notice.	___