0000380: There is the problem on the correlator
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ID Category Severity Reproducibility Date Submitted Last Update
0000380 [DZB] correlator board major always 28-09-11 11:43 05-10-11 12:07
Reporter Yuan Tang View Status public  
Assigned To Sjouke Zwier
Priority normal Resolution fixed  
Status resolved  
Summary 0000380: There is the problem on the correlator
Description There is still the correlator problem which causes the different problem with different settings:
  In settings of 8 bands,4 polars,128ch,BW=10MHz(recirculation factor 2):
     The cross correlations of 0-7YDY have no Ampls in band2,6.
  In settings of 8 bands,2 polars,256ch,BW=10MHz(recirculation factor 2):
     All cross correlations of *XDX,*YDY have no Ampls in band5 and no TPs of DX,DY in band5.
  In settings of 8 bands,4 polars,64ch,BW=20MHz:
     All cross correlations of *YDY have no Ampls in band5 and no TP of DY in band5.
(Sjouke and Albert: Above informations may be helpful for you to locate the problem in the correlator.
For 4 polars data only know the problem on XX,YY but not on XY,YX.)
Additional Information
nr subbands 1
nr polarisations
nr channels
bandwidth
multi-subarray no
recirculation yes
Attached Files

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- Notes
(0000362)
Yuan Tang
03-10-11 14:30

 At last the correlator problem has been solved now. It was caused
by the malfunction of the input board 1 of the COR unit 3. After it has
been replaced this afternoon the test observations show the correlator
works fine. Thanks Sjouke.
 
(0000363)
Sjouke Zwier
05-10-11 12:07

 Error for Inputboard 1 in Corr. rack unit2 for the Rx-signals 12 to 15.
Inputboard replaced by spare Board.
 

- Issue History
Date Modified Username Field Change
28-09-11 11:43 Yuan Tang New Issue
28-09-11 11:43 Yuan Tang nr subbands  => 1
28-09-11 11:43 Yuan Tang multi-subarray  => no
28-09-11 11:43 Yuan Tang recirculation  => no
28-09-11 11:43 Yuan Tang Assigned To  => Sjouke Zwier
28-09-11 11:43 Yuan Tang Status new => assigned
03-10-11 14:30 Yuan Tang Note Added: 0000362
03-10-11 14:30 Yuan Tang Status assigned => testing
05-10-11 12:07 Sjouke Zwier recirculation no => yes
05-10-11 12:07 Sjouke Zwier Note Added: 0000363
05-10-11 12:07 Sjouke Zwier Status testing => resolved
05-10-11 12:07 Sjouke Zwier Resolution open => fixed