UHFLI Lock-in Amplifier
600 MHz is the new benchmark frequency for lock-in amplifiers. This product is a dream come true for many scientists forced to implement their own hardware instead of focusing on research. The UHFLI Lock-in Amplifier is Zurich Instruments' new flagship going all the way to combine frequency domain and time domain analysis in one single-box powerhouse. It is based on an innovative platform with 1.8 GHz sampling. The future of phase sensitive measurements has become reality.
UHFLI Key Features
- 600 MHz operation
- 2 independent lock-in units
- 2 high-performance signal generators
- 3 independent harmonics per lock-in unit
- 1 high-speed oscilloscope with 65k samples
- 1 frequency response analyzer
- 1 FFT spectrum analyzer with 5 MHz span
- Best-in-class graphical user interface
UHFLI Applications
- Quantum & nano physics
- Semiconductor engineering
- Sensors & actuators
- Laser spectroscopy
UHFLI Available Options
UHF-MF Multi-frequency
The multi-frequency option extends the UHFLI by providing the powerful flexibility of choosing the input channel, and the oscillator frequency for each demodulator independently. Simultaneous demodulation of 6 arbitrary frequencies is enabled.
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UHF-MOD AM/FM Modulation
The AM/FM modulation option for the UHFLI allows for the direct measurement of sidebands in dynamic AM (amplitude modulation) and FM (frequency modulation) schemes. This option helps the user to precisely measure periodic variations in the frequency or the amplitude of up to 6 sidebands of the modulation frequency.
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UHF-PLL Dual Phase-locked Loop
The phase-locked loop option provides two programmable digital PLLs with high-speed frequency tracking. Seamlessly integrated with the lock-in amplifier, the programmable PLLs allow frequency tracking of the input signal with loop filter bandwidth programmable in a wide range, and lock-in demodulation with the generated reference. The customer friendly UHF-PLL Advisor simplifies finding optimal loop filter parameters.
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UHF-RT Real-time
The real-time option enables the user to implement and execute custom real-time algorithms directly inside the UHFLI. Programs written in C are supported by a comprehensive library and react to inputs in less than 1 microsecond. This timing behaviour is inherently reproducible and robust.
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UHFLI Functional Diagram
UHFLI Specifications
| Lock-in Operating Modes | |
| internal reference mode | single and dual lock-in |
| external reference mode | single and dual lock-in |
| auto reference mode | single and dual lock-in |
| dual-harmonic mode | 1 fundamental + 2 harmonics (simultaneous) |
| multi-harmonic mode | 1 fundamental + 5 harmonics (simultaneous), requires UHF-MF Multi-frequency |
| arbitrary frequency mode | 6 frequencies, requires UHF-MF Multi-frequency |
| UHF Signal Inputs | |
| frequency range | DC - 600 MHz |
| input impedance | 50 Ω or 1 MΩ || 20 pF |
| input voltage noise | 5 nV/√Hz |
| dynamic reserve | 100 dB |
| input range (AC+DC) | ±3.5 V |
| input full range sensitivity | 1 nV to 1.5 V |
| A/D conversion | 12 bit, 1.8 GS/s |
| UHF Signal Outputs | |
| frequency range | DC - 600 MHz |
| output ranges | ±150 mV, ±1.5 V |
| D/A conversion | 14 bit, 1.8 GS/s |
| Reference & Nanosecond Triggers | |
| frequency range | 1 mHz - 600 MHz |
| connectors | 2 bidirectional, 2 output, 2 input |
| reference frequency resolution | 6 µHz |
| reference phase angle resolution | 1.0 µ° |
| Demodulators | |
| frequency range | 1 mHz - 600 MHz |
| number of demodulators | 6 dual-phase |
| output sample rate on USB | 14 MS/s (total all demodulators), 64-bit full range |
| output sample rate on Aux outputs | 28 MS/s (for each Aux Output), 16 bit |
| filter time constant | 30 ns - 500 s |
| filter bandwidth | 80 µHz - 5 MHz |
| filter slope | 6, 12, 18, 24, 30, 36, 42, 48 dB/Oct |
| Auxiliary Signals | |
| high-speed outputs | 4 channels, ±10 V, amplitude, phase, frequency, X, Y, or user defined |
| D/A converter | 16 bit, 28 MS/s |
| D/A analog bandwidth | 5 MHz |
| high-speed inputs | 2 channels, ±10 V |
| A/D converter | 16 bit, 400 kS/s |
| A/D analog bandwidth | 100 kHz |
| Connectivity & Others | |
| host connection | USB 2.0 high-speed, 480 Mbit/s LAN / Ethernet 1 GBit/s |
| pre-amplifier control bus | 2 ZCtrl (RJ45 connectors) proprietary interface to control external pre-amplifiers |
| digital I/O | 32 bit, 50 MHz, general purpose |
| clock | 10 MHz, input and output, ovenized oscillator (OCXO), 1 ppm deviation |
| General | |
| dimensions | 45 x 28 x 9 cm 17.7 x 13.4 x 4 inch, suited for 19 inch rack |
| weight | 7.0 kg |
| power supply | 110 / 120 / 220 / 240 V, 50 / 60 Hz |
| operating temperature | +5 °C to +40 °C |
| signal connectors | BNC on front panel, SMA on back panel |
| PC operating systems | 32-bit and 64-bit version of Windows XP, Vista, Windows 7, Linux |