HF2PLL Phase-locked Loop

 

 

The HF2PLL is a bundle of the HF2LI Lock-in Amplifier and the HF2LI-PLL option.

It is a high-performance instrument combining two 50 MHz phase-locked loops with two independent 50 MHz lock-in amplifiers. The PLLs provide fully configurable support for accurate frequency tracking, while the lock-in amplifiers provide best-in-class signal recovery featuring the Zurich Instruments unique 128 bit technology. With unprecedented capabilities, the HF2PLL embodies the new state-of-the-art for phase sensitive measurements and enables new applications in the high-frequency range.

HF2PLL Key Features

• 2 50 MHz phase-locked loops
• 2 independent fully configurable lock-in units
• 2 high-frequency, high-performance signal generators
• 50 kHz PLL bandwidth with full parameter control
• Q-Control, increase and decrease
• AFM pack (optional): automatic gain control, Kelvin probe feedback
• Harmonic mode
• State-of-the-art software integration
• Easy to use HF2PLL Advisor tool

HF2PLL Applications

• Atomic force microscopy (AFM)
• Scanning tunnelling microscopy (STM)
• Near-field scan optical microscopy (NSOM)
• Micro electromechanical systems (MEMS)
• Resonators / Magnetometers
• Frequency combs: time reference definition
• Semiconductor characterization and testing

More applications in this section of our website.

All publications using the HF2PLL.

HF2PLL Available Options

HF2LI-MF Multi-frequency

The multi-frequency option extends your HF2PLL by providing the powerful flexibility of choosing the input channel, the oscillator frequency, and the filter coefficients for each demodulator independently. It allows for the simultaneous demodulation of in total 6 arbitrary frequencies.

HF2LI-MOD AM/FM Modulation

The HF2LI-MOD is an option for the HF2PLL and allows for the direct analysis of sidebands in dynamic AM (amplitude modulation) and FM (frequency modulation) schemes. This option helps the user to precisely measure period variations in the frequency or the amplitude of the application signal.

HF2LI-PID Quad PID Controller

The HF2LI-PID option builds on the HF2PLL and seamlessly integrates no less than 4 high performance PID (proportional integral derivative) controllers for general purpose. The controllers provide the means the efficiently implement closed loop control on several physical parameters of the HF2PLL outputs.

HF2LI-RT Real-time

The real-time option enables you to implement and execute custom real-time algorithms directly inside the HF2PLL. Your programs written in C are supported by a comprehensive library and react to inputs in less than 10 microseconds. This timing behaviour is inherently reproducible and robust.

HF2LI-UHS Ultra-high Stability

The ultra-high stability option provides an ovenized quartz oscillator for excellent phase noise characteristics. The specifications of this oscillator improve the accuracy of the HF2PLL data processing ideal for precision critical applications.

HF2PLL Functional Diagram

HF2PLL Specifications