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Image of Flex07-32. The dimension of the external enclosure is approximately
34cmx10cmx2.5cm
Functions:
1. 32 channel real time MT-16 multiple tau digital correlator.
2. Minimum sample time 200 ns.
3. Minimum integration time 6553.6us.
4. Maximum integration time 1.677 seconds. Could be extended upon
request.
Flex07-32 hardware specifications:
- Input signal: standard TTL pulses.
- 33 BNC connectors
- One USB connector.
- Windows98/2000/ME/XP/Vista libraries
included.
Correlation specifications:
1. MT-16 multiple tau channel layout ( sample time denoted at T, data width
W):
- Auto/cross correlations.
- 200 ns minimum sample.
- 128 real time channels.
- Delay time range: 0.2 us to 52428.8us in multiple tau channel layout.
- First 16 channels: T = 0.2us, W = 4 bits, delay times 0.2us to 3.2 us;
- Second 8 channels: T = 2*0.2us, W = 5 bits, delay times 3.6 to 6.4us
- Third 8 channels: T = 4*0.2us, W = 6 bits, delay times 6.8us to 12.8us;
- Fourth 8 channels: T = 8*0.2us, W = 7 bits, delay times 14.4 to 25.6us;
- Sample time doubles every 8 channels and data width increment 1 bit to prevent
overflow.
- The longest delay time is 52428.8 us.
2. Integration time is from 1 to 256 times of 6553.6 us
More about multiple tau theory.
Multiple tau theory was invented by Klaus Schätzel. The following papers discuss
the theory and the advantage of the multiple tau scheme.
- Klaus Schätzel. Single Photon Correlation Techniques. Dynamic Light
Scattering: The method and some applications, Edit by Wyn Brown, Clarendon Press, Oxford,
P 76, 1993.
- Klaus Schätzel et. Noise on Multiple-Tau Photon Correlation Data.
SPIE Vol. 1430, P109, Photon Correlation Spectroscopy: Multicomponent Systems,
1991.
- Klaus Schätzel. New Concept in Correlator Design. Inst. Phys. Conf. Ser. No.
77, P175, 1985.
- Klaus Schätzel et. Photon Correlation Measurements at Large Lag
Times. Journal of Modern Optics, Vol. 35, No. 4, P711, 1988.
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