For embedded application in analysis / inspection equipment
A Lock-in amplifier with high reliability for minute signal
measurement.
Its main core parts are condensed into a compact
chassis.
A significant improvement with the SN ratio can be expected
by incorporating this module into the signal detection part
of analysis equipment or inspection devices. It is simple
design with eliminated both display and operation panel,
controlled from a PC via USB/LAN.
-
Wide frequency bandwidth
10 mHz to 1
MHz
It covers a wide frequency range such as mechanical vibration and physical property measurement. Locks to the reference signal in 2 cycles when shortest.
-
High sensitivity 10 nVrms
Sensitivity can be selected from 10 nVrms to 1 Vrms. It has a wide input voltage range and can measure various signals.
-
High-speed response, time
constant from 1
µs
Equipped with time constant filter and moving average filter. By combining with a moving average filter, high-speed response can be expected even at low frequency.
-
Dynamic reserve 100 dB
Dynamic reserve is the ratio of acceptable noise level to the signal measurement range full scale. Using this device, you can detect very small signals compared to the noise level.
-
Oscillator output
Equipped with an oscillator output, the system configuration can be simplified by using it as a reference signal. Output waveform can be selected sine wave or TTL level square wave. DC bias can be added with the output voltage at sine wave.
-
Harmonic measurement
Measurement is possible not only at harmonics but also at frequencies that are fractional multiples of the fundamental (×1/1 to ×63/64).
It also supports advanced measurements such as second derivative. -
2-channel model
(LI5502)
The LI5502 is two channels of input model so simultaneously measures the two signals with the same reference signal.
Amplitude ratio and phase difference between channels can also be measured. - USB/LAN interface
System configuration
Basic
Multi-channel
• Operates according to settings in internal memory. Therefore, a PC-less system is also available.
• An internal oscillator output can be used instead of an external signal generator.
Power supply
- Operating voltage: ±14 to 16VDC
- Current: Approx. +400mA / -110mA (LI5501) Approx. +480mA / -120mA (LI5502)
- Connector: Dsub type 9pin
- ※ It is recommended the current capacity of the power supply would be about twice of the above.
- ※ DC power supply with good stability and noise performance is recommended to achieve good performance for measuring minute signals.
Installation
Mounting bracket is ready. Rubber feet are attached to the bottom of the module.
Software
A sample program is provided. It can be used as a reference when programming control software.
Front and Rear Panel (LI5502)
Front
Rear
*1 It displays conditions such as
out of sync, communication failure, and signal
saturation.
*2 Input a reference signal when
synchronizing the internal oscillator with other
equipment.
*3 Use for reading the setting
memory.
Application
- Infrared spectrometer
- Terahertz spectrometer
- Thermophysical property evaluation equipment
- Semiconductor inspection equipment
- Electronic microscope
- Scanning microscope
