Stanford SR124 Analog Lock-In Amplifier (0.2 Hz - 200 kHz, single pha)

Signal Channel:

Voltage inputs: Single-ended or differential

Sensitivity: 100 nV to 500 mV

Current input: 106 or 108 V/A

Input impedance:

Voltage: 10 MΩ+ 35 pF, AC or DC coupled

Current input: 1 kΩ to virtual ground

Gain accuracy: ±1 %

Gain stability: 100 ppm/°C (flat mode, normal reserve)

Noise (rms):

2.5 nV/√Hz at 1kHz

0.14 pA/√Hz at 1 kHz (106 V/A)

0.014 pA/√Hz at 100 Hz (108 V/A)

Signal filters(Tuneable from 0.2 Hz to 200 kHz):

Flat: Flat response to within ±1 % from 10 Hz to 100 kHz, ±2 % from 100 kHz to 200 kHz, and ±10 % below 10 Hz.

Band pass: Bandwidth adjustable from 1 % to 100 % of center frequency (Q from 100 to 1).

High pass: –12 dB/oct rolloff

Low pass: –12 dB/oct rolloff

Reference Channel:

Frequency range: 0.2 Hz to 200 kHz

Reference input: TTL or sine (100 mVpp min.)

Input impedance: 1 MΩ

Phase resolution: 0.01°

Phase accuracy:

±1° (2 to 20 kHz),

±5° (20 kHz to 200 kHz)

Harmonic detection: F, 2F and 3F (ext. ref)

Demodulator:

Output stability:

Low noise: 20 ppm/°C

Normal: 100 ppm/°C

High reserve: 1000 ppm/°C

Internal Oscillator:

Range: 0.2 Hz to 200 kHz

Outputs: Sine, square. (When using an external reference, output is phase locked to the external reference.)

Frequency accuracy: 0.1%

Frequency resolution: 3½ digits or 1 mHz (whichever is greater)

Amplitude: 1 µV to 20 Vpp into 10 kΩ, 50 Ω output impedance.

Amplitude stability: 50 ppm/°C

Inputs and Outputs:

Lock-In/AC Volt: Instrument can be operated as a lock-in amplifier or as a frequency selective AC voltmeter.

Output:

Lock-in:

X (Rcosθ), ±10 V

Y (Rsinθ), ±10 V, SR2124 only

AC Volt: ±10 V

General:

Power: 40 W, 100/120/220/240 VAC, 50/60 Hz

Dimensions: 17" × 5.25" × 19.5" (WHD)

Weight: 23 lbs.

Datasheet

Manual