... 172.032 MHz bw, 16 bit sampling, 1 millisecond dumps, and 4096 channels. ... The cal is set to transition 500 usecs into millisecond 20 of the off and the on. A phase offset was seen in some of the data taken on 14nov08. Data on 13,15,16,17nov08 did not have the problem (see galfacts page ) . ... It will be 1 if the ttl cal input was high for any portion of the 1 millisecond integration. blue dashed lines: the expected cal transition . ... Cal correct: 19.75 milliseconds . ...