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HF2PLL 위상-락 루프(Locked Loop)

  • 개요
  • 어플리케이션
  • 옵션
  • 기능 다이어그램
  • 사양

The HF2PLL 위상-락 루프(Locked Loop)의 구성

2개의 독립된 50 MHz 락-인 앰플리파이어와 2개의 50 MHz 위상-락 루프를 통합한 고성능 제품입니다. PLL에서는 뛰어난 아날로그 프론트 엔드와 고분해능의 고속 신호를 처리하는 최고 수준의 신호를 변환할 수 있는 락-인 앰플리파이어를 이용하여, 정밀한 주파수 검색이 가능하도록 정확한 설정을 할 수 있습니다. PLL 어드바이저와의 결합으로 고주파수 범위내에서 최고의 위상 동기화 성능을 달성하는 것이 간단하게 되었습니다.

HF2PLL 주요 특징

  • 듀얼 50 MHz 위상-락 루프
  • 2개의 다양한 설정이 가능한 락-인 앰플리파이어
  • 2개의 고주파수, 고성능 신호 발생기
  • 모든 파라미터의 컨트롤이 가능한 50 kHz PLL 대역폭
  • 4개의 설정이 가능한 PID 컨트롤러
  • 어플리케이션 팩 (표준장비): 자동 게인 컨트롤, 칩 보호, 피크 분석
  • 어플리케이션 팩 (옵션): 켈빈 프로브 포스 현미경, Q컨트롤,
    듀얼 레퍼런스 주파수 트래킹(DFRT), 사이드 밴드 분석
  • PLL 고조파 모드
  • 주파수 편차 및 소실 출력(지터 프리)
  • 최첨단 소프트웨어: ZoomFFT 주파수 응답 해석, HF2PLL 관리자, PID 관리자 오실로스코프 분광기
  • LabVIEW, MATLAB, Python, C를 포함한 프로그래밍 인터페이스.

HF2PLL 어플리케이션

  • 원자력 현미경(AFM)
  • 주사형 터널링 현미경 (STM)
  • 주사형 근접장 광학 현미경 (SNOM, NSOM)
  • 마이크로 전자 기계 시스템 (MEMS)
  • 공진기 / 자기 센서
  • 주파수 Comb : 시간 레퍼런스 정의
  • 반도체 특성 측정 및 테스트

HF2PLL 사용가능 옵션

HF2LI-MF 멀티 주파수

The HF2LI-MF multi-frequency option impressively extends the capability of the HF2LI lock-in amplifier by adding a wide range of configuration alternatives. This largely improves the flexibility of the instrument and enlarges the research horizon of scientists.

자세히 보기


The HF2LI-MOD is an option for the HF2LI 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 periodic variations in the frequency or the amplitude of the application signal. Such schemes are typically applied in oscillator and resonator related setups.

자세히 보기

HF2LI-RT 실시간

The HF2LI-RT option consists of a programming environment that enables the user to implement customized software on a powerful embedded Microblaze® processor inside the HF2LI. Plenty of resources to support complex algorithms are provided. This is for instance required by RT (real-time) applications needing fast reaction based of input signal changes. The processor runs free of interrupts and the timing behavior of the software is inherently robust and reproducible.

자세히 보기


Many scientists are not able to rely on climate-controlled laboratories or stable temperature conditions for their measurement setup. Furthermore they are concerned with the issue of instrument aging and they would also like to have long recalibration intervals thus enabling them to reduce costs. These users should consider selecting the HF2LI-UHS option for their precision critical applications.

자세히 보기

HF2PLL 기능 다이어그램

High-Precision Inputs

The 2 input paths of the HF2PLL are optimized for very low noise operation. The sampling rate of 210 MSa/s is 4 times the analog bandwidth, ensuring full capture of the signal and reducing aliasing.

Quad PID Controller

Four fully configurable PID controllers with a wide selection of input and output units support the efficient implementation of control loops. The advisor and tuning tools greatly simplify the tedious optimization of control parameters. The maximum bandwidth depends on the chosen configuration, but is at least 5 kHz per PID controller for any application.

Demodulators and Filters

The HF2PLL provides 6 dual-phase demodulators. Each demodulator can be configured with its own filter properties.
The advantages of digital versus analog instruments include higher dynamic reserve, zero drift, precise phase shifts, and orthogonality. Excellent Measurement and Configuration Tools Integrated tooling provides a comprehensive set of analysis features making use of external equipment, such as an oscilloscope, obsolete. The internal oscilloscope with memory for 2048 samples provides immediate signal- vs-time plots. A sweeper can function as frequency response analyzer providing high-resolution signal- vs-frequency plots, as well as sweeper over other internally controlled quantities like voltages or time constants. An FFT spectrum analyzer provides very high resolution signal analysis on frequency spans of up to 200 kHz. Finally the HF2PLL Advisor and the PID Advisor ensure efficient closed-loop parameter settings.

Application Pack

A selection of product options enable many additional modes of operation and measurement. In particular the HF2LI-MF and the HF2LI-MOD option provide the multi-harmonic mode (MHM), dual frequency resonance tracking (DFRT), frequency modulated Kelvin probe force microscopy (FM-KPFM) and Q-Control. It is easy to extend the application support at any time as both mentioned options can be upgraded in the field.


PLL 작동모드
constant excitation yes
constant amplitude yes, with automatic gain control
Q-control yes (option)
Kelvin probe feedback yes (option)
frequency range 1 Hz - 50 MHz
center frequency 1 µHz - 50 MHz
PLL bandwidth (1 MHz) 16 Hz - 50 kHz
PLL bandwidth (100 kHz) 16 Hz - 10 kHz
phase noise (100 kHz at 100 Hz distance) -100 dBc/Hz
HF 아날로그 입력
frequency range 0.8 µHz - 50 MHz
input voltage noise 5 nV/√Hz above 10 kHz
dynamic reserve 120 dB
A/D conversion 14 bit, 210 MSa/s
HF 아날로그 출력
frequency range DC - 50 MHz
output ranges ±10 mV, ±100 mV, ±1 V, ±10 V
signal adder ±10 V, DC to 50 MHz bandwidth
D/A conversion 16 bit, 210 MSa/s
변조 & 레퍼런스
number of demodulators 6 dual-phase
output sample rate on USB: up to 460 kSa/s
on Auxiliary outputs: 1 MSa/s
filter time constant 1 µs - 500 s
filter bandwidth 80 µHz - 200 kHz
filter slope 6, 12, 18, 24, 30, 36, 42, 48 dB/Oct
reference frequency resolution 0.8 µHz
reference phase angle resolution 1.0 µ°
dimensions 45 x 35 x 10 cm (19" rack)
weight 6.2 kg
power supply 110-120 V, 220-240 V, 50/60 Hz
operating temperature +5 °C to +40 °C
PC operating systems 32-bit and 64-bit version of Windows XP, Windows 7, Linux
  • 가족친화우수기업
  • 청년친화 강소시업
사업자등록번호 : 220-86-72761대표이사 : 신동만대표전화 : 070-7872-0701팩스 : 02-2167-3801
(우)07299 서울특별시 영등포구 경인로 775 (문래동 3가, 에이스하이테크시티 3동 2층)