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User name mercado
Log entry time 11:52:17 on October16,2009
Entry number 295207
This entry is a followup to: 295072
keyword=Sync signals with and without signal split
Posted below are sync signals from the R-HRS and the CH scalers.
Remember, the sync signal is produced by a random variation of a 12-bit DAC
which goes through a V-F and then gets gated and read out by a scaler.
The first Figure shows these plots for when the signal is split via
T-connector in order to use the same 12-bit DAC signal for an ADC sync into a
Voltage ADC. For some reason, the signal changes and drifts a little.
Nonetheless, the sync check (bottom right) is what we would expect.
The second Figure shows plots after getting rid of the T-connector split. The
signals are now perfectly linear as they should be. The sync check plot (bottom
right) is what we expect.
So, even though the signal changes, the sync check is good for both instances.