SE1354 Multichannel Lock-In Amplifier

The number of channels of SE1354 multi-channel lock-in amplifier can be flexibly customized (up to 10 channels are optional), and the bandwidth is 100k or 500k optional; each channel is an independent and synchronous lock-in unit, and each channel contains: Voltage signal single-ended Input, voltage signal differential input, current signal input, TTL reference signal, sinusoidal reference signal input, TTL reference signal output, sinusoidal signal output, 2 auxiliary signal outputs and 2 auxiliary signal inputs.
The multi-channel lock-in amplifier SE1354 is a powerful tool specially developed for customers who need to measure multiple channels at the same time. Its excellent measurement accuracy and high integration make the customer’s system more integrated and measurement more convenient. Each channel can simultaneously realize the measurement of 1 fundamental wave and 7 harmonic demodulation channels. And 7 channels of harmonics can also be set to any frequency mode.

Key Features

Number of channels 3 to 10 channels optional

Frequency range DC to 100kHz or 500kHz optional

1nV to 5V voltage measurement range

Time constants 1us to 3ks

Noise down to 5nV√Hz

8 arbitrary frequency demodulators per channel

Dynamic reserve up to 130dB

Communication interface: RS232, USB, network port

  • Software Interface

    • SE1354 multi-channel lock-in amplifier has shortcut graphic buttons and rich graphic operation functions.
    • In addition, this software has clear numerical display and waveform display functions and can display measurement data in real time.
    • The measurement results can be exported and saved in excel format for subsequent analysis by professional software. Handy.
    • What’s more, we provide full support for Python, MATLAB, and LabVIEW application programming interfaces (APIs).
1. Signal Channel
Voltage Input Mode

Single-ended or Differential

Full-scale Sensitivity

1 nV to 5 V in a 1-2-5 sequence

Current Input

106  V/A


Voltage: 10 MΩ // 10 pF, AC or DC coupled

Current: 1 kΩ to virtual ground


> 120 dB to 10 kHz, decreasing by 6 dB/oct

Dynamic Reserve

> 120 dB

Gain Accuracy

0.2% typ, 1% max

Voltage Noise

5 nV/√Hz at 997 Hz

Current Noise

260 fA/√Hz at 997 Hz

2.Reference Channel

Frequency range:  1 uHz to 500 kHz

Reference input: TTL or Sine

Input impedance: 10 MΩ


Resolution: 1 µdeg

Absolute phase error: < 1 deg

Relative phase error: < 0.01 deg

Orthogonality: 90° ± 0.001°

Phase noise: (Internal ref.) Synthesized, <0.0001° rms at 1 kHz;  (External ref.) 0.005° rms at 1 kHz (100 ms time constant, 12 dB/oct)

Drift: <0.01°/℃ below 10 kHz, <0.1°/℃ above 10 kHz

Harmonic Detection

2F, 3F, …nF to 500 kHz  (n<65,535)

Acquisition Time

Internal ref.: instantaneous acquisition

External ref.: (3 cycles + 5 ms) or 40 ms, whichever is larger

3. Demodulator

Digital output: no zero drift on all setting

Display: no zero drift on all setting

Analog output: <5 ppm/℃ for all dynamic reserve settings

Harmonic Rejection

-75 dB

Time Constant

1 µs to 3 ks (<200 Hz)

(6, 12, 18, 24, 30, 36, 42, 48 dB/oct rolloff)

Synchronous Filters

Available below 20 Hz

4. Internal Oscillator

Range: 1 mHz to 500 kHz

Accuracy: 2 ppm + 10 µHz

Resolution: 1 uHz


-80 dBc (f < 10 kHz)

-70 dBc (f > 10 kHz)


100 nVrms to 5 Vrms




100 ppm/℃

Sine Output

Sine signal output impedance is 50Ω

TTL Synchronous

5 V TTL/CMOS level


output impedance 200Ω

5. Clock Interfaces

10 MHz clock input, 3.3 V TTL/CMOS

Clock Output

10 MHz clock output



6. Communication Interfaces

RS-232: standard 9-array RS-232 female socket


USB2.0 high-speed communication interface

7. System Reference Interface
Ref in System

reference signal input interface, 3.3 V TTL/CMOS

Ref out System

reference signal output interface, 3.3 V TTL/CMOS

8. Outputs
CH1 and CH2 Outputs

Function: output X, Y, R, θ

Amplitude: ±10 V

Impedance: 100 Ω

AUX Inputs

Function: 2 channel input

Amplitude: ±10 V

Impedance: 1 MΩ

9. General
Power Requirement

Voltage: 220 – 240 VAC

Frequency: 50 Hz

Power: 80 W


302 (W) × 177 (H) × 350 (D) mm  (with feet)



Main Machine

SE1354 Multichannel Lock-In Amplifier 100/500 kHz optional, 3 to 10 channels optional, 1 nV to 5 V voltage measurement range

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