Comparison of statistics taken with Q2 and Q6 in runs: data1x/MSUJune2012/Run252 ro Run271 On the scalers Q2 rate was 2.5 and Q6 rate 1.5 kHz. These are the counts seen in the full quad in a 15 minutes acquisition (note that 500 kB/s is the minimum allowed): ^ mode ^ readout limit ^ Q2 ^ Q6 ^ deadtime ^ |validate | 500 | 15M | 8.5M |61%| |validate | 700 | 1.3M | 14.5M|29%| |validate | 1000 | 2.6M | 15.5M|29%| |validate | 1500 | 0.8M | 15.8M|28%| |validate | 2000 | 0.7M | 13.5M|26%| |TTCS | 500 | 17.1M | 12.1M| |TTCS | 2000 | 21.5M| 17.8M| This means that as we move from 500 we can lose more than 90%