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eLockIn 204

Manual of the eLockIn204 (PDF, 894 KB)
LockInRemote (1 MB) - last update: November 2010

-  digital quad-channel high-frequency Lock-In Amplifier   -


The eLockIn204 lockin amplifier has several parameters and features which are only
found in these Anfatec instruments. The most unique are:
  • input sampling rate of 40 MHz (fully digital design, 1 MHz bandwidth)
  • real quad-channel amplification in the full frequency range
  • 4 channel output data rate of 156 kHz
  • dual harmonic mode in the full frequency range
  • on-screen 4-channel spectra acquisition
  • web-interface for external communication
The eLockIn204 can be used as spectrum analyser, as oscilloscope, as sinus generator or
as measurement control system. It provides 8 A/D channels as external inputs and controls
8 D/A channels with 156 kHz update rate as external signal outputs. It can store 32 MByte
data, provides modern network connection and USB connection.

Moreover, it acts as web server and all data are available over the internet.

General

Dynamic Reserve
> 135 dB

Remote control
Ethernet
Integrated Oscillator 10 mHz ... >1 MHz (3 mHz resolution)
Noise @ 100 kHz
< 6 nVrms/Hz 0.5
Time constants
100 µs... 1 ks
Sensivity ranges
10 nV ... 10 V
Phase resolution
0.001 deg
Frequency stability @ 10 kHz
50 mHz/year (@ 20 °C +/- 3 °C)

Special features in brief

    Digital 4-channel LockIn amplifier between 3 mHz and 1 MHz with reference output and reference input (1st to 15th harmonic) with approximately 40 kHz update rate

    spectrum analyzer

    analogue output of 4 channels with 156 kHz sampling rate

    4 channel oscilloscope (4 out of 4 LockIn channels and 8 external channels)

    measurement system with 8 AUX-In and 8 AUX-Out
    with 24 bit resolution and 160 kHz update rate

    USB and Network connection, parallel and serial port

    32 MB data space

    Webserver for web access of all data

    reference input with less than 10 degree phase deviation (over the full frequency range)

Specification of the LockIn amplifier

Signal Input
Voltage Input BNC
Input Impedance 1 MOhm || 12 pF
Damage Threshold > +/- 12 V
Bandwidth dc to > 1 MHz (3 dB bandwidth)
Full Scale Input Ranges ± 5 V (high dynamic reserve)
± 500 mV (normal)
± 50 mV (low noise)
Full Scale Sensitivities 10 nV, 20 nV, 50 nV, ...
logarithmic till 10 V
Typical Input Noise:
   @ 100 kHz, high dynamic < 300
   @ 100 kHz, normal dynamic < 50
   @ 100 kHz, low dynamic < 6 (typ. 5)
RollOff 6 dB/oct, 12 dB/oct, 24 dB/oct
Time Constants

0.1 ms ... 1 ks

Gain deviations between dynamic ranges: < 1%

Gain deviations between different time constants:

< 1%
Reference Output

Internal Oscillator

10 mHz .. > 1 MHz

Frequency Resolution

< 3 mHz

Frequency Accuracy

+/- 50 ppm from 0°C to 70 °C

Reference Output Voltage

< 1 mVpp ... max. 20 Vpp

Output Noise @ 100 kHz for 7 Vrms output

< 60

Reference Input

Frequency range

1 Hz to 1 MHz

Locking time

< 10 periods + 200 ms

Phase error

< 10 degree @ 1 MHz

Main screen of the lockin display

main LockIn screen
                                               
Measurement screen

Measurement screen

Oscillloscope screen

oscilloscope screen