0000218: The cross correlations of 9X*X,9Y*Y(MFFE-11) have no Ampls at Lband.
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ID Category Severity Reproducibility Date Submitted Last Update
0000218 [MFFE] 0.unknown/unspecified major sometimes 18-01-10 13:54 03-02-10 11:07
Reporter Yuan Tang View Status public  
Assigned To Harm-Jan Stiepel
Priority normal Resolution fixed  
Status resolved  
Summary 0000218: The cross correlations of 9X*X,9Y*Y(MFFE-11) have no Ampls at Lband.
Description The cross correlations of 9X*X,9Y*Y have no Ampls, and
the TPs of 9X,9Y(MFFE-11) are too low.
(It is an intermittent problem which happened twice at Lband observations.
It became normal after stopping and starting the daemon of MFFE-11.)
Additional Information Op28 jan. is het MFFE11 in RT9 gewisseld voor MFFE03.
De oorzaak waren twee defecte DC/DC omvormers (6 cm Y en Lband Y) in de LNA voeding.
MFFE 11
RT 9
MFFE-band 21cm
polarisation X, Y
sky frequency (MHz)
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- Issue History
Date Modified Username Field Change
18-01-10 13:54 Yuan Tang New Issue
18-01-10 13:54 Yuan Tang MFFE  => 11
18-01-10 13:54 Yuan Tang RT  => 9
18-01-10 13:54 Yuan Tang MFFE-band  => 21cm
18-01-10 13:54 Yuan Tang polarisation  => X, Y
18-01-10 13:54 Yuan Tang Assigned To  => Harm-Jan Stiepel
18-01-10 13:54 Yuan Tang Status new => assigned
03-02-10 10:23 Harm-Jan Stiepel Assigned To Harm-Jan Stiepel => Yuan Tang
03-02-10 10:24 Harm-Jan Stiepel Assigned To Yuan Tang => Harm-Jan Stiepel
03-02-10 11:07 Harm-Jan Stiepel Status assigned => resolved
03-02-10 11:07 Harm-Jan Stiepel Resolution open => fixed
03-02-10 11:07 Harm-Jan Stiepel Additional Information Updated