It comes with the vendor's cryogen-free bottom-loading cryostat (the OptistatDry BLV), an MFLI lock-in amplifier
from Zurich Instruments, a specially designed ESD break-out box, and high-quality cables.
Low Resistance set-up for use with Lock-in amplifier
Either the phase or the dispersive in-phase output of the lock-in amplifier
can be used in a feedback loop to lock the driving frequency to the Larmor frequency by stabilizing the phase shift to -90[degrees].
The block diagram of a typical lock-in amplifier is shown in Figure 2.
The lock-in amplifier uses this reference signal to select a small range of signal frequencies centered on the reference frequency to amplify and deliver to the signal measuring circuit.
A lock-in amplifier with two detectors--a dual-phase lock-in--has two references in quadrature and determines both the cosine of the phase difference as well as a separate sine term.
In theory, a lock-in amplifier seems like a great idea.
The PMD resolution of the system appears to be limited by the phase noise of the lock-in amplifier
In spite of the high performance lock-in amplifier used as a second stage signal-amplifier, the signal-to-noise ratio must be optimized for the output of the photocurrent measuring preamplifier.
The output signal maximum of 1 V is determined by the largest full-scale signal of the lock-in amplifier input where the output signal is connected.
Typical applications include spectroscopy, particle detection, fast current and resistance measurements, general lab use and front end for ultrafast lock-in amplifiers
, oscilloscopes and A/D converters.