0000171: Some problem at 6cm VLBI settings

  

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ID Category Severity Reproducibility Date Submitted Last Update
0000171 [MFFE] 0.unknown/unspecified major always 28-09-09 14:45 30-11-09 07:50
Reporter Yuan Tang View Status public  
Assigned To Harm-Jan Stiepel
Priority normal Resolution open  
Status closed  
Summary 0000171: Some problem at 6cm VLBI settings
Description There are some cross talk between X and Y at 6cm VLBI settings:
(see 10904478)
The problem can be seen on RT2,9(MFFE-04,06) and there are also bad
shapes of bandpass of 3X*X(MFFE-09) at band7. According the experience
they could be caused by the condensed molecules of air with 20K which
come into 6cm receiver. Could we try to solve these problem before the
coming VLBI(22/10)? (just let the MFFE warm up and cool it again)
Additional Information
MFFE 04
RT 2
MFFE-band 6cm
polarisation X, Y
sky frequency (MHz)
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- Issue History
Date Modified Username Field Change
28-09-09 14:45 Yuan Tang New Issue
28-09-09 14:45 Yuan Tang MFFE  => 04
28-09-09 14:45 Yuan Tang RT  => 2
28-09-09 14:45 Yuan Tang MFFE-band  => 6cm
28-09-09 14:45 Yuan Tang polarisation  => X, Y
28-09-09 14:50 Yuan Tang Assigned To  => Harm-Jan Stiepel
28-09-09 14:50 Yuan Tang Status new => assigned
30-11-09 07:50 Harm-Jan Stiepel Status assigned => closed