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From about 4:40/247 UT/DOY until 4:56/247 we lost the external reference phase lock on the 2nd LO. The oscillator was accidentally turned off and the LO signal was also lost for a minute or two, before the unit was turned back on. Observer, Warren. The DAS aborted at UT 10:08. I restarted with vsop.pro. Shortly after I checked coherence and did not find it. I reprogrammed the das using profile vsop_ho.pro. This time I got coherence. Finished at 10:30 UT. jd