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Anfatec's lockin amplifiers use a unique DSP technology which is only found in these instruments.
High speed real-time data processing is combined with optimized analogue input stages.
Fully digitally designed high quality filtering ensures an excellent suppression of background signals and an unsurpassed dynamic reserve.
USB Lock-in Amplifier
10 mHz to 250 kHz
135 dB Dynamic Reserve
Integrated PID Control
1 µs Time Constant
Multi Lock-In Amplifier
10 mHz to 250 kHz
up to 7 USB Lock-In in one
Differential & Dingle Input
3 HE 19" Housing Lock-In
Stand-alone Systems
eLock-in 203
10 mHz to 250 kHz
< 4 nV/√Hz Input Noise
> 138 dB Dynamic Reserve
Dual Input / Dual Reference
eLock-in 204
10 mHz to 1 MHz
Optimum Price-to-Speed Ratio
Digital Quad-Phase Amplifier
Spectrum Acquisition
eLock-in 205
30 mHz to 10 MHz
Extra fast Analogue Output (1 µs)
> 500 MHz Input Sampling Rate
1 µs ... 1 ks Time Constant
| AMU 2.4 | AMU 5.0 | eLockIn203 | eLockIn204/2 | eLockIn205/2 | USB Lockin | |
|---|---|---|---|---|---|---|
| Inputs | Single Input | Dual input A, A-B, A&B |
Single Input | |||
| typ. Noise @ 10 kHz and 100 kHz | 8 nV / √Hz | 2.5 nV / √Hz | 2.5 nV / √Hz | 3.5 nV / √Hz | 4 nV / √Hz | 4 nV / √Hz |
| Interface | PCI | PCIe | Ethernet / USB | USB | ||
| Calibrated Frequency Range | 3 mHz to 1 MHz | 3 mHz to 2 MHz | 10 mHz to 250 kHz | 10 mHz to 1 MHz | 30 mHz to 10 MHz | 10 mHz to 250 kHz |
| Time Constants | 100 µs - 5 s | 200 µs - 5 s | 200 µs - 1 ks | 200 µs - 1 ks | 0.1 µs -1 ks | 10 µs - 5 s |
| in Sync-Mode | 1 - 200 cycles | 1 - 200 cycles | 1 µs / 1 - 200 cycles | 0.1 µs / 1 - 200 cycles | 1 µs | |
| Aux Out | - | 8 channels 156 kHz 24 bit |
8 channels 1 MHz 18 bit |
2 channels 250 kHz 18 bit |
||
| Spectrum Acquisition | mHz to 4 MHz | mHz to 250 kHz | mHz to 2 MHz | mHz to 20 MHz | mHz to 1 MHz | |
| External Trigger | TTL | Sine > 50 mVrms,TTL | Sine Wave > 50 mVrms, TTL | Sine Wave > 50mVrms, TTL | ||
| Optional I/U converter | - | - | Yes | Yes | - | - |
| Input impedance | 100 kΩ || 15 pF | 1 MΩ || 15 pF | 1 MΩ || 15 pF | 1 MΩ || 15 pF | 1 MΩ || 15 pF | 1 MΩ || 20 pF |
| List Price | 1550 € | 1860 € | 5030 € | 6900 € | 9180 € | 2670 € |
Lockin amplifiers are instruments designed to recover signals that
are buried in noise. They require a reference signal at the same frequency as
the signal that is being measured and then use this to demodulate the input
signal before filtering.Scitec produces a range of lock-in amplifiers to meet
different requirements. We also offer a DSP based lock-in amplifier
A lock-in amplifier is a type of amplifier that can extract a signal with
a known carrier wave from an extremely noisy environment. Depending on
the dynamic reserve of the instrument, signals up to 1 million times smaller
than noise components, potentially fairly close by in frequency, can still
be reliably detected. It is essentially a homodyne detector followed by
low-pass filter that is often adjustable in cut-off frequency and filter order.
Whereas traditional lock-in amplifiers use analog frequency mixers and RC filters
for the demodulation, state-of-the-art instruments have both steps implemented
by fast digital signal processing, for example, on an FPGA. Usually sine and cosine
demodulation is performed simultaneously, which is sometimes also referred to as dual-phase
demodulation. This allows the extraction of the in-phase and the quadrature component
that can then be transferred into polar coordinates, i.e. amplitude and phase, or further
processed as real and imaginary part of a complex number (e.g. for complex FFT analysis).