이 강력한 제품은 2 개의 50MHz 위상 고정 루프(Phase-Locked Loop)와 2 개의 독립적인 50 MHz 락인앰플리파이어를 통합하였습니다. PLL은 정확한 주파수 추적을 위해 완벽하게 구성 가능한 지원을 제공하고, 락인앰플리파이어(잠금증폭기)는 동급 최고의 신호 복구를 제공합니다.
위상 고정 루프 (Phase-Locked Loop)
주요특징
- 듀얼 50 MHz 위상고정루프(Phase-Locked Loop)
- 2개의 락인앰플리파이어
- 2개의 고주파, 고성능 신호 발생기
- 모든 파라미터 제어가능 50 kHz PLL 대역폭
- 4개의 PID 컨트롤러
- PLL 고조파(하모닉) 모드
- 주파수 편차 및 손실 출력 (지터 없음)
HF2PLL 위상 고정 루프는 다음 제품으로 구성된 번들입니다.
- HF2LI 락인앰플리파이어
- HF2LI-PLL 옵션
- HF2LI-PID 옵션
- 원자력 현미경 (AFM)
- 주사 터널링 현미경 (STM)
- 근거리 주사 광학 현미경 (SNOM, NSOM)
- 마이크로 전자 기계 시스템 (MEMS)
- 공진기 (Resonators) 및 자력계 (magnetometers)
- 주파수 빗 (Combs) : 시간 기준 정의
- 반도체 특성화 및 테스트
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
The efficient implementation of control loops is supported by 4 fully configurable PID controllers with a wide selection of input and output units. The advisor and tuning tools 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 comes with 6 dual-phase demodulators. Each demodulator can be configured with its own filter properties. The advantages of digital vs. analog instruments include higher dynamic reserve, zero drift, precise phase shifts, and orthogonality. An integrated toolset provides comprehensive analysis functionalities. The internal oscilloscope, with memory for 2048 samples, gives access to immediate signal vs. time plots. The Sweeper tool can function as a frequency response analyzer for high-resolution signal vs. frequency plots, as well as a sweeper over other internally controlled quantities such as voltages or time constants. The FFT Spectrum Analyzer enables 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 unlock many additional modes of operation and measurement. In particular, the HF2LI-MF and the HF2LI-MOD options provide the multi-harmonic mode (MHM), dual frequency resonance tracking (DFRT), frequency modulated Kelvin probe force microscopy (FM-KPFM) and Q-Control. Both of these options are field-upgradeable.
PLL operation modes
| Constant excitation | Yes |
| Constant amplitude | Yes, with automatic gain control |
| Q-control | Yes (option) |
| Kelvin probe feedback | Yes (option) |
| Frequency range | 1 Hz to 50 MHz |
| Center frequency | 1 µHz to 50 MHz |
| PLL bandwidth (1 MHz) | 16 Hz to 50 kHz |
| PLL bandwidth (100 kHz) | 16 Hz to 10 kHz |
| Phase noise (100 kHz at 100 Hz distance) | -100 dBc/Hz |
HF analog input
| Frequency range | 0.8 µHz - 50 MHz |
| Input voltage noise | 5 nV/√Hz above 10 kHz |
| Dynamic reserve | 120 dB |
| A/D conversion | 14 bits, 210 MSa/s |
HF analog output
| 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 bits, 210 MSa/s |
Demodulator and reference
| 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° |
General
| 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 |
