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Features
- 2 GSa/s (500 ps per point) effective sampling rate (500 MSa/s
real-time sampling rate)*
- Record lengths up to 262,144 points (131 µs at 500 ps/point)
- 1 to 65,536 sweeps averaged per record
- <1 µs end-of-scan deadtime* during averaging(<1 % idle time)
- Averaged records continuously streamed to hard disk at 4 MB/s
- Precision Enhancer* transforms 8-bit ADC into 12-bit ADC, for 16
times greater dynamic range
- Live or post-acquisition trend display
- Computes and displays an FFT of recorded waveforms
- Complete with software for Windows 95, 98 and NT
- ActiveX Controls compatible with LabVIEW, C++, Visual Basic and
other popular software packages
The Eclipse is a high performance, digital signal averager supplied as
a compact line-powered console designed to be operated from a personal
computer via the supplied PCI-bus plug-in card and connecting cable. The
instrument includes a full applications software package, designed for
Windows 98/XP, which gives access to all the unit's controls and
graphically displays acquired records, as well as allowing live or post
acquisition trend analysis. In addition, an FFT display mode calculates
and displays the intensity versus frequency spectrum of recorded
waveforms. Alternatively, the user can develop his or her own software
using the supplied ActiveX controls, which are compatible with most modern
programming languages.
The outstanding performance of the Eclipse is demonstrated by the very
low deadtime when averaging of less than 1 µs. This feature is the
key figure of merit when comparing the Eclipse with other techniques, such
as digital storage oscilloscopes, which often require significant times -
up to milliseconds in some cases - after each sweep in order to perform
the averaging process. Because of this low deadtime, the overall data
throughput rate can be very high, allowing higher repetition rates and
shorter experiment times than are possible when using other methods.
This very low deadtime is achieved by averaging sweeps as they are
acquired. The input signal, after amplification, is digitized with an
8-bit flash ADC and resulting sample added to a the sum of all previous
samples at the same point in time in a 24-bit deep output memory. The
sampling process is repeated to record the input waveform versus time, so
that by choosing the number of samples taken and the sampling rate the
time span being monitored can be adjusted.
In order to deliver the best possible time resolution the Eclipse has
to operate as the source of trigger signals for the experiment, but this
should rarely cause a problem.
The Eclipse is suitable for use in any application requiring on-line
averaging and/or high repetition rates, especially those with noisy
repetitive signals of a transient nature. In these cases, where
measurement times are necessarily short, the low deadtime and high data
throughput will make it the instrument of first choice.
| Input |
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Channels |
1 |
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Impedance |
50 W |
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Sensitivity |
± 0.5 V FS |
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Coupling |
DC |
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Offset |
- 0.4 V to + 0.4V |
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Bandwidth |
DC coupled; rise time < 1 ns |
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Input Protection |
Max ±2 V DC, or ±10 V for 50 ns and
<1% duty cycle |
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Digitization |
Binary |
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Resolution |
8 bits with Precision Enhancer* to
deliver 12-bit performance |
| Sampling Time Per Point |
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0.5, 1.0 or 2.0 ns (Eclipse must act as source of
system trigger) |
| Min No of Sweeps per complete
Record |
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0.5 ns/point |
4 |
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1 ns/point |
2 |
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2 ns/point |
1 |
| Trigger Output |
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Impedance |
50 W |
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Pulse Width |
64 ns |
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Pulse Polarity |
Low to High signifies start of sweep |
| Sweep Duration |
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512 to 262,144 clock periods |
| Deadtime (between end of sweep
and generation of next trigger) |
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Adjustable from 0.544 µs to 8.554 µs in 32 ns steps |
| Memory |
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262,144 × 24-bit words |
| Number of Sweeps in Average |
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1 to 65,536 |
| Averaging Method |
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Linear summation |
| Data Output - Eclipse to PC via
supplied PCI bus card and cable |
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Typically 4 averaged records, each of 262,144 points,
per second to hard disk |
| Software |
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Full operating package running under Windows 98/XP is
provided to enable instrument control and graphical or file
representation of the averaged result. ActiveX controls are
compatible with LabVIEW, C++, Visual Basic and other software
development environments. |
Download
version 2.0 of the Eclipse operating software today!
The latest version 2.0 of the Eclipse operating software is now
available. It is updated to allow full operation of the Eclipse hardware
from any computer running Windows 98, 98SE and XP, as well as using
the latest industry-standard MSI installation package format. Existing
users of the Eclipse hardware can download this new revision free
of charge by clicking the link below.
Eclipse is a trademark of AMETEK Advanced Measurement Technology, Inc.
All other trademarks used are the property of their respective owners.
* Patents pending.
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is
a trademark of AMETEK, Inc.