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  • 개요
  • 어플리케이션
  • 기능 다이어그램
  • 사양

UHF-PID 옵션은 4개의 설정 가능한 PID(비례, 적분 미분) 컨트롤러를 가지고 있습니다. 여러가지 계측 데이터를 바탕으로, 많은 기기 파라미터와 출력치에 신속한 피드백을 실시합니다. 락-인 앰플리파이어와의 완벽한 통합으로, 프로그래머블 PID는 2개의 레이저 위상 동기용 PLL(위상-락 루프)의 설정이나, CEO 안정화, 고속 AFM 모드와 같은 폭넓은 어플리케이션에서의 동작을 가능하게 합니다. PID 어드바이저는 적절한 파라미터를 신속하게 찾아 설치하는 데 도움이 되도록 적절한 파라미터 및 디스플레이 응답을 신속하게 파악할 수 있도록 도와줍니다. 자동 조정 기능을 사용하면 루프 필터 설정이 자동적으로 조정되어 최소 잔류 PID 오류가 있는 지점을 찾을 수 있습니다.

UHF-PID 주요 특징

  • 4 independent PID controllers
  • PID Advisor with multiple DUT models, transfer function and step function modeling to achieve an adjustable target bandwidth
  • Auto Tune PID that automatically minimizes the average PID error signal by adjusting various set of parameters and bandwidth
  • High speed operation with up to 300 kHz loop filter bandwidth
  • Input parameters: demodulator data, auxiliary inputs, auxiliary outputs and arithmetic unit
  • Output parameters: Output Amplitudes, Oscillator frequencies, Demodulator Phase, Auxiliary Outputs and Signal Output Offsets
  • Phase unwrap for demodulator Θ data (± 64 π), e.g. for optical phase locked loops
  • Low pass filter for derivative branch

UHF-PID 업그레이드 및 호환성

  • Option upgradeable in the field
  • Compatible to all other UHF options

UHF-PID 어플리케이션

  • Laser frequency stabilization
  • Optical Phase locked loop, e.g. carrier envelope offset stabilization (CEO)
  • High-speed AFM, e.g. automatic gain control (AGC)
  • MEMS measurements, e.g. gyroscopes
  • Interferometer stabilization
  • Nano-mechanical oscillators

UHF-PID 기능 다이어그램

Phase Locked Loop

One important application of the PID controllers is the phase coherent synchronization of two oscillators - Phase Locked Loop or PLL. The most simple case is whenever a signal is provided to the lock-in amplifier as an external frequency reference and then automatically mapped to one of the internal oscillators by setting either demodulator 4 or 8 to ExtRef. One PID would then take the phase information from one of the demodulators as an input and provide feedback to the frequency of one of the internal oscillators. It is important to know that this principle can also be reversed and the good phase noise properties of the internal oscillators can for example be transferred to an external setup such as a laser system.

Arithmetic Unit

The Arithmetic Unit can be used in combination with the PID controllers and allows to perform basic mathematical operations for instance on demodulator data before providing the result as input for the PID. A simple example is the stabilization of an interferometer where the calculation of a phase angle based on atan2(Y/X), where the X component is taken from the fundamental frequency and the Y component of the 2nd harmonic multiplied with a normalization factor, can be used for feedback.

PID Advisor and Auto Tune

While the PID Advisor and the Auto Tune feature allow for easy and convenient setup of control loops even for the inexperienced user, the LabOne toolset provides all means to characterize the achieved performance. The Plotter visualizes PID error and PID output in the time domain and shows a histogram for the data, the SW Trigger can be used to record step responses when the PID set point is changed. These step responses can directly be compared to the model functions of the PID Advisor. The integrated Spectrum Analyzer displays the frequency domain data of the control loop signals to see "servo bumbs" and potential noise sources and the Sweeper allows to characterize transfer functions to gather a thorough understanding of the entire setup.


Configuration 4 PID controllers with PLL capability
PID input parameters X, Y, R, and Theta from demodulators 1 to 8, auxiliary inputs 1 and 2, auxiliary outputs 1 to 4
PID output parameters Amplitude of signal outputs 1 and 2, frequency of oscillators 1 to 8, auxiliary outputs 1 to 4, digital output DIO (16 bit)
PID bandwidth up to 300 kHz
PID minimum propagation delay 1.5 µs (Signal Input to Aux Output)
PLL frequency range 10 Hz - 600 MHz
PLL bandwidth up to 300 kHz
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사업자등록번호 : 220-86-72761대표이사 : 신동만대표전화 : 070-7872-0701팩스 : 02-2167-3801
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