0000423: The TP of 9Y is unstable in all bands, intermittent.
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ID Category Severity Reproducibility Date Submitted Last Update
0000423 [DZB] 0.unknown/unspecified major sometimes 08-01-13 10:34 18-02-13 15:09
Reporter Yuan Tang View Status public  
Assigned To Juergen Morawietz
Priority normal Resolution open  
Status closed  
Summary 0000423: The TP of 9Y is unstable in all bands, intermittent.
Description The TP of 9Y is unstable in all bands, intermittent.
(see it at Lband observation, need to see if it appears at other frequenies.)
Additional Information
nr subbands 1
nr polarisations
nr channels
bandwidth
multi-subarray no
recirculation no
Attached Files

- Relationships

- Notes
(0000402)
Juergen Morawietz
08-01-13 16:48

 understood from Harm-Jan that he did not find a problem in the front-end

Checked IVC power supply -> okay

So I interchanged the equalizer of 9Y with 9X.

Observer, please check if the problem changes to X or remains

changed status to "testing"

Juergen, 8.1.2013
 
(0000405)
Juergen Morawietz
08-01-13 16:55

 BTW: checkek also IVC power supply unit of 9

Juergen, 8.1.2013
 
(0000413)
Juergen Morawietz
08-02-13 09:11

 Problem did not occur during the last 4 weeks.
status -> resolved
 
(0000414)
Juergen Morawietz
18-02-13 15:09

 Status -> closed
 

- Issue History
Date Modified Username Field Change
08-01-13 10:34 Yuan Tang New Issue
08-01-13 10:34 Yuan Tang nr subbands  => 1
08-01-13 10:34 Yuan Tang multi-subarray  => no
08-01-13 10:34 Yuan Tang recirculation  => no
08-01-13 10:34 Yuan Tang Assigned To  => Juergen Morawietz
08-01-13 10:34 Yuan Tang Status new => assigned
08-01-13 16:48 Juergen Morawietz Note Added: 0000402
08-01-13 16:48 Juergen Morawietz Status assigned => testing
08-01-13 16:55 Juergen Morawietz Note Added: 0000405
08-02-13 09:11 Juergen Morawietz Note Added: 0000413
08-02-13 09:11 Juergen Morawietz Status testing => resolved
18-02-13 15:09 Juergen Morawietz Note Added: 0000414
18-02-13 15:09 Juergen Morawietz Status resolved => closed