- dual digital quad-channel high-frequency Lock-In
Amplifier -
The
eLockIn204/2 is quite similar to the eLockIn204 - the only difference is, that the model eLockIn204/2 has 2 lockin inputs!
Therefore the 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 eLockIn204/2 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 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 @ 1 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
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
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
Measurement screen
Oscillloscope screen
|
|
|
