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lbaops:lbasep2014:v490ccdlog [2014/09/20 20:07]
lbaops:lbasep2014:v490ccdlog [2015/12/18 16:38] (current)
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 +**NB** Ceduna appears to have variable gain throughout this experiment. This problems appears to be in the receiver itself but was not discovered until toward the end of the LBA session. The problem appears as a sudden drop in the apparent Tsys and affects both channels. 
 +UT 09:00 - No network connection to Ceduna
 +UT 09:32 - Network connection re-established
 +Recording to ATNF_V008B
 +Skype exchange:
 +[20/09/2014 7:46:11 pm] Jamie Stevens: Hobart, looking at the fringe plots I'd say we are actually getting fringes in your high frequency band, just much weaker than the low frequency band
 +[20/09/2014 7:46:35 pm] Jamie Stevens: If I recall correctly, an SMY freq of 206 MHz is lower than recommended
 +[20/09/2014 7:47:06 pm] Jamie Stevens: try increasing the SMY output level if you can't change its frequency
 +Following this, Yuri increased the output of 2LO to 10dB. Jamie was also concerned about the lower freq. setup for Cd as well.
lbaops/lbasep2014/v490ccdlog.1411207673.txt.gz · Last modified: 2015/12/18 16:38 (external edit)