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The high prices for usual desktop lock-in-amplifiers often impede their use in cost sensitive applications. For this reason, FEMTO designed a complete and easy-to-use lock-in board at a very attractive price. All settings for sensitivity, time constant and phase shift can be selected either manually by front-panel switches or remotely by a PC via the digital interface. Additional signal filters can be configured by jumpers on the board to further increase the dynamic reserve in demanding applications.
19" Board versus PC Card
A PC card is exposed to
the electromagnetic disturbed environment inside a computer case.
Therefore, using a PC card for ultra-sensitive measurements of small
signals is often not practical. FEMTO's Series
Applications
| Model |
Single Phase |
Single Phase |
Dual Phase |
Dual Phase |
| Working Frequency |
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| Time Constants | 3 ms-10 s 6 or 12 dB/Oct. |
300 µs-1 s 6 or 12 dB/Oct. |
3 ms-10 s 6 or 12 dB/Oct. |
300 µs-1 s 6 or 12 dB/Oct. |
| Outputs |
X = In Phase, 10 V Full Scale, Short-Circuit Protected, Monitor Output |
X = In Phase,
Y = Quadrature, R = Magnitude, 10 V Full Scale, Short-Circuit Protected, Monitor Output |
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| Sensitivity (Full Scale) |
Voltage: 3 µV
- 1 V in 1-3-10 Steps Current: 30 pA - 10 µA in 1-3-10 Steps |
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| Voltage Input |
True-Differential Instrumentation-Amplifier,
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| Current Input |
Transimpedance-Amplifier,
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| Signal Filter |
Highpass User Selectable |
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| Reference Input | 100 mV to 5 V, Switchable to TTL | |||
| Phase |
Adjustable 0°
- 360° with 8 Bit Resolution, Temperature Drift |
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| Max. Dyn. Reserve | 80 dB | |||
| Digital Control | 16 TTL/CMOS Inputs: 8 Bit Phase, 4 Bit Time Constant, 4 Bit Sensitivity | |||
| Power Supply | ± 15 V, + 120 mA / - 60 mA | |||
| Dimensions | 160 x 100 x 20 mm (L x W x H), Weight 100 g. (0.22 lbs) | |||
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The optional
Reference Oscillator |
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Block Diagram LIA-BVD-150-H

FEMTO photoreceivers and amplifiers are available in North America exclusively from ELECTRO OPTICAL COMPONENTS, Inc.

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