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Discussion of precise time and frequency measurement

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Stanford Research SR620 Measurement Bias

CD
Corby Dawson
Sun, Sep 27, 2009 8:54 PM

Stan.
Calibrating the units timebase per page 76 of the manual you can
manually
adjust the calbyte 4 word until the counter averages zero offset plus
minus around the 5Mhz.
You will still have the .0060 bias but it will plus and minus 30.
Corby Dawson


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Stan. Calibrating the units timebase per page 76 of the manual you can manually adjust the calbyte 4 word until the counter averages zero offset plus minus around the 5Mhz. You will still have the .0060 bias but it will plus and minus 30. Corby Dawson ____________________________________________________________ Best Weight Loss Program - Click Here! http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFoYckJJTSz9ZWtSYYnIdcHHnuViYytOdHmKkw6a10JBXXussDDPq/
MD
Magnus Danielson
Sun, Sep 27, 2009 9:01 PM

Corby,

Corby Dawson wrote:

Stan. 
 Calibrating the units timebase per page 76 of the manual you can

manually
adjust the calbyte 4 word until the counter averages zero offset plus
minus around the 5Mhz.
You will still have the .0060 bias but it will plus and minus 30.

This will not solve his issue. Notice how the error increases in size by
about a decade as the time-base steps down by a decade. This is not a
time-base issue, this is a time-delay issue, a static delay between
start and stop events. I am preparing a more detailed answer.

Cheers,
Magnus

Corby, Corby Dawson wrote: > Stan. > Calibrating the units timebase per page 76 of the manual you can > manually > adjust the calbyte 4 word until the counter averages zero offset plus > minus around the 5Mhz. > You will still have the .0060 bias but it will plus and minus 30. This will not solve his issue. Notice how the error increases in size by about a decade as the time-base steps down by a decade. This is not a time-base issue, this is a time-delay issue, a static delay between start and stop events. I am preparing a more detailed answer. Cheers, Magnus