Noise Thermometry - Page 19
The only solution so far has been to match the frequency
characteristics of the two cables very precisely (by adjusting
BUT this means: With cable capacitances of a few tens
of picofarad, resistance is limited to around 100 ohm, and
bandwidth to around 100kHz.
System cannot tolerate any change in the sense resistance
– so is only suitable for measuring a single fixed
All previous attempts have been limited by this constraint,
but no longer!
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