Signal Processor/Lock-In Amplifier, Advanced Laboratory Instrument by TeachSpin

Signal Processor/Lock-In Amplifier

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Preamplifier
Input impedance 1 MW
Noise @ 1kHz 9nV/Hz^½
Common Mode Rejection 100 dB
Max Output Voltage ± 10 V

Filter
Input Impedance 5 MW
Max Input Voltage ± 12.5 V
Frequency Range 3Hz - 3kHz
Q Values .577, .707, 1, 2, 5, 10, 20, 50

Detectors
Input Impedance 100 kW
Max Input Voltage ± 12.5 V
Reference Switch Window ± 2 mV
Reference Switching Spikes 50 mV pp. for .5 µs

Low-Pass Filter / Amplifier (Output)
Input Impedance 1 MW
Max Input Voltage ± 12.5 V
Max Output Volatge ± 10 V
Max Output Current ± 3.5 mA
Time Constant .03, .1. .3, 1.0, 3.0, 10 seconds
6 db/oct and 12 db/oct roll-off
DC Offset ± 10 V
Input Offset Voltage 100 µV

Reference Oscillator
Frequency 2.6 to 3.2 kHz
Harmonic Distortion .3% @ 3Hz, .03% > 30 Hz
Max Output Voltage 4Vpp. (sine),
8.8 Vpp. (Square)
Max Output Current 35 mA
Frequency Stability 200 ppm/^oC
at HF, 800 ppm/^oC at LF end of range

Phase Shifter
Input Impedance 50 kW
Frequency 3 Hz thru 3kHz
Phase Shift 360^o
Quadrature Phase Accuracy ± 2^o
Max Input Voltage ± 12.5 V

Noise / Attenuator
Input Impedance 1.1 MW
Attenuation 10⁵
Noise Voltage Output Max 1 V rms