Anfatec Instruments AG
Measurement Science and Technology &
Scanning Probe Microscopy

eLockIn205/2

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


Manual of the eLockIn205/2 (PDF, 2.5 MB)
LockInRemote (1 MB) - last update: November 2010

Being the top model eLockIn series, the eLockIn205/2 offers a very fast TCP/Ip connection, ultra-fast DAC outputs of the measured signals and all signals supplied at BNC connectors.
  • input sampling rate of more than 500 MHz (fully digital design, 10 MHz bandwidth)
  • real quad-channel amplification in the full frequency range
  • 4 channel output data with 1 us group delay
  • dual harmonic mode in the full frequency range
  • on-screen 4-channel spectra acquisition
  • web-interface for external communication
The eLockIn205/2 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 1 us group delay as external signal outputs. It can store 128 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 30 mHz ... >20 MHz (10 mHz resolution)
Noise @ 1 kHz
< 6 nVrms/Hz 0.5
Time constants
100 ns... 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
  • dual input allows the modes A, A-B and A&B
  • 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 0C 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