0000066: The TP of 1X(MFFE-08) is unstable(10% of TP) at Lband.
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ID Category Severity Reproducibility Date Submitted Last Update
0000066 [MFFE] 0.unknown/unspecified major sometimes 04-09-08 09:18 03-11-08 09:45
Reporter Yuan Tang View Status public  
Assigned To Harm-Jan Stiepel
Priority normal Resolution open  
Status closed  
Summary 0000066: The TP of 1X(MFFE-08) is unstable(10% of TP) at Lband.
Description The problem has been found from the one band observation at 21cm.
It is not clear if the problem comes from the MFFE or backend at
this moment. We will trace the problem later on.
Additional Information It can be seen in all bands (10804165)
MFFE 08
RT 1
MFFE-band 21cm
polarisation X
sky frequency (MHz)
Attached Files

- Relationships

- Notes
(0000084)
Yuan Tang
15-09-08 13:30

 Now the problem also appeared at 6cm(see 10804475, in all 8 bands),
and at 92cm(10804472, in all 2 bands). So it seems a problem from
the backend, maybe from the equalizer.
 
(0000086)
Hans Weggemans
17-09-08 06:47

 17 september equalizer changed
 
(0000088)
Yuan Tang
17-09-08 07:09

 17/09,2008
After the equalizer had been replaced yesterday, the problem is
still there.
 
(0000101)
Bert Woestenburg
03-11-08 09:44

 The problem has not occurred recently. Therefore this item is set to "finished".
 

- Issue History
Date Modified Username Field Change
04-09-08 09:18 Yuan Tang New Issue
05-09-08 07:56 Jurjen Sluman Additional Information Updated
15-09-08 13:30 Yuan Tang Note Added: 0000084
15-09-08 13:30 Yuan Tang Status new => assigned
15-09-08 13:30 Yuan Tang Category 0.unknown/unspecified => back-end
15-09-08 13:34 Yuan Tang Project submission => DZB
15-09-08 13:36 Yuan Tang nr subbands  => 1
15-09-08 13:36 Yuan Tang multi-subarray  => no
15-09-08 13:36 Yuan Tang recirculation  => no
15-09-08 13:36 Yuan Tang Assigned To  => Hans Weggemans
15-09-08 13:36 Yuan Tang Category back-end => 0.unknown/unspecified
17-09-08 06:47 Hans Weggemans Note Added: 0000086
17-09-08 07:09 Yuan Tang Note Added: 0000088
01-10-08 09:20 Jurjen Sluman Project DZB => MFFE
01-10-08 09:21 Jurjen Sluman MFFE  => 08
01-10-08 09:21 Jurjen Sluman RT  => 1
01-10-08 09:21 Jurjen Sluman MFFE-band  => 21cm
01-10-08 09:21 Jurjen Sluman polarisation  => X
01-10-08 09:21 Jurjen Sluman Assigned To Hans Weggemans => Harm-Jan Stiepel
03-11-08 09:44 Bert Woestenburg Note Added: 0000101
03-11-08 09:45 Bert Woestenburg Status assigned => closed