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Model 5105
Dual Phase Lock-in Amplifier
- Computer Control Only
The model 5105 is a compact dual-phase lock-in amplifier ideal for many
signal recovery applications not demanding the performance offered by more
sophisticated units in the SIGNAL RECOVERY
range. It does not incorporate controls for manual operation but instead
is operated entirely via a RS232 interface using simple ASCII character
string commands. This approach allows the unit to be located closer to the
signal source than is the case with PC card based instruments, thereby
improving performance.
The instrument uses two switching type demodulators to measure the
magnitude of the of the input signal in-phase (X) and in quadrature (Y)
with the applied reference signal, and outputs both analog and digital
representations of these components. The analog outputs are provided at
front panel BNC connectors whilst the digital values, and in addition the
resulting signal vector magnitude and phase angle, are available as
responses to RS232 commands.
The signal channel includes high and low-pass filters which can be set
to "bracket" the signal of interest thereby further improving
the noise rejection, whilst the reference channel will operate from an
external TTL or analog reference waveform.
Included with each unit is a copy of 5105Acquire, a simple but
versatile Windows software package, giving access to all the instrument's
controls and outputs. This software can also be downloaded from this site
- for further details click here.
Further software support is available in the form of a LabVIEW driver
supporting all instrument functions, and the Acquire™ data
acquisition software. The driver and a demonstration version of the
software, DemoAcquire, are available for download from this site.
| Input |
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Mode |
Single-ended or asymmetrical
differential |
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Sensitivity |
10 µV to 1 V in 10 dB steps |
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Impedance |
10 MW // 30
pF |
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Noise |
< 30 nV/ÖHz
at 1 kHz |
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C.M.R.R. |
> 40 dB |
| Frequency Response |
5 Hz to 20 kHz
(Or any spot frequency between 5 Hz and 100 kHz) |
| Dynamic Reserve |
> 80 dB |
| Detection |
Phases |
2 |
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Modes |
F |
| Output |
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Modes |
Analog X, Y |
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Digital X, Y, R, q |
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Time constant |
0.3 ms to 10 s |
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Roll-off |
6 or 12 dB/octave |
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Voltage |
±1 V FS |
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Impedance |
1 kW |
| Interface |
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RS232
(Up to 15 units may be controlled from a single RS232 port) |
| Power |
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±18 V DC unregulated from model PS0108
provided |
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is
a trademark of AMETEK, Inc.