0000366: At 92cm, Lband and 6cm the TP of 0X(MFFE-16) is unstable, intermittent.
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ID Category Severity Reproducibility Date Submitted Last Update
0000366 [MFFE] 0.unknown/unspecified major sometimes 15-08-11 12:23 17-06-14 12:54
Reporter Yuan Tang View Status public  
Assigned To Juergen Morawietz
Priority normal Resolution open  
Status closed  
Summary 0000366: At 92cm, Lband and 6cm the TP of 0X(MFFE-16) is unstable, intermittent.
Description At Lband the TP of 0X(MFFE-16) is unstable, intermittent.
(It seems the problem comes from the MFFE-16.)
Additional Information The TP of 0X/MFFE-16 is unstable in all bands which have been seen both at Lband and 6cm.
MFFE 16
RT 0
MFFE-band L-band, 6cm
polarisation X
sky frequency (MHz)
Attached Files

- Relationships

- Notes
(0000393)
Yuan Tang
05-10-12 11:30

 20121005:
The TP of 0X(MFFE-16) is unstable in all bands at Lband, intermittent.
(The problem appeared at Lband, 6cm and 92cm. It is not very clear if
the problem comes from the MFFE or the backend. Maybe try to replace the
equalizer of 0X firstly.)
 
(0000396)
Yuan Tang
12-10-12 13:15

 20121012:
After replacing the equalizer of 0X the problem is still there.
 
(0000410)
Juergen Morawietz
08-01-13 17:03

 8.1.2013:

interchanged equalizer 9X with 9Y.
Does the problem move to orthogonal channel?!

Status -> "progressing"

- Juergen -
 
(0000427)
Juergen Morawietz
17-06-14 12:54

 closed this issue, because it is very old and the telescope was refurbished
meanwhile.
 

- Issue History
Date Modified Username Field Change
15-08-11 12:23 Yuan Tang New Issue
15-08-11 12:23 Yuan Tang MFFE  => 16
15-08-11 12:23 Yuan Tang RT  => 0
15-08-11 12:23 Yuan Tang MFFE-band  => L-band
15-08-11 12:23 Yuan Tang polarisation  => X
15-08-11 12:24 Yuan Tang Assigned To  => Juergen Morawietz
15-08-11 12:24 Yuan Tang Status new => assigned
30-08-11 13:46 Juergen Morawietz Assigned To Juergen Morawietz => Harm-Jan Stiepel
22-08-12 12:28 Yuan Tang Summary At Lband the TP of 0X(MFFE-16) is unstable, intermittent. => At Lband and 6cm the TP of 0X(MFFE-16) is unstable, intermittent.
22-08-12 12:28 Yuan Tang Additional Information Updated
05-10-12 09:12 Yuan Tang MFFE-band L-band => L-band, 6cm
05-10-12 11:30 Yuan Tang Note Added: 0000393
05-10-12 11:30 Yuan Tang Assigned To Harm-Jan Stiepel => Juergen Morawietz
12-10-12 13:15 Yuan Tang Note Added: 0000396
12-10-12 13:15 Yuan Tang Summary At Lband and 6cm the TP of 0X(MFFE-16) is unstable, intermittent. => At 92cm, Lband and 6cm the TP of 0X(MFFE-16) is unstable, intermittent.
08-01-13 17:03 Juergen Morawietz Note Added: 0000410
08-01-13 17:03 Juergen Morawietz Status assigned => progressing
17-06-14 12:54 Juergen Morawietz Note Added: 0000427
17-06-14 12:54 Juergen Morawietz Status progressing => closed