Opposite change in rates after the Raster and Current Change

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User name miham

Log entry time 06:09:59 on June 13, 2009

Entry number 280963

keyword=Opposite change in rates after the Raster and Current Change

I compared the rates from runs #3535 and #3537. After the first run
we changed the raster size from (7x5)MCC to (6x4)MCC and increased
the current from 10uA to 12uA. Here are the results 

Run #   |  T3 rate    |  T1 rate    | Current |
-----------------------------------------------
3535    |  6376.6 Hz  |  251000 Hz  |   10uA  |
3537    |  6917.6 Hz  |  359574 Hz  |   12uA  |

From the comparison of the T3 rates we see that 
the rate in the new run is relatively smaller than
it should be : 6917.6 Hz < (1.2*6376.6 = 7652.0 Hz)
This suggests that with old raster we were hitting 
something. However when I compare the T1 rates I see
that new rates are to big:
359574 Hz >  (251000.4 Hz * 1.2 = 301207 Hz)

Which number should I relay on?

A copy of this log entry has been emailed to: doug