0000085: No signal in 7y if Albert Bos uses the repaired phase-switch pattern and noisesource pattern
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ID Category Severity Reproducibility Date Submitted Last Update
0000085 [MFFE] phase switching major always 11-11-08 15:37 19-02-09 07:55
Reporter Geert Kuper View Status public  
Assigned To Harm-Jan Stiepel
Priority normal Resolution fixed  
Status resolved  
Summary 0000085: No signal in 7y if Albert Bos uses the repaired phase-switch pattern and noisesource pattern
Description There is a timing problem in the noisesource switch pattern and in the phase-switch pattern. Albert has repaired this but during tests there was no signal in 7y if using FE phaseswitching. When using only backend phaseswitching 7y is ok. Albert thinks that the problem is located at the RT or mffe.
The old software has been restored until the problem is found.
Additional Information De faseswitch van RT7Y is gerepareerd. De led in de Switch box in de kelder
voor het uitschakelen van Noisesource en Phaseswitch i.vm. VLBI SD metingen
was defect.
MFFE 11
RT 7
MFFE-band
polarisation Y
sky frequency (MHz)
Attached Files

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- Notes
(0000112)
Jurjen Sluman
25-11-08 14:24

 Test observation done and it seems to work normal again
 

- Issue History
Date Modified Username Field Change
11-11-08 15:37 Geert Kuper New Issue
11-11-08 15:41 Geert Kuper Category hardware => telescope
11-11-08 15:43 Geert Kuper Project submission => DZB
11-11-08 15:45 Geert Kuper nr subbands  => 1
11-11-08 15:45 Geert Kuper multi-subarray  => no
11-11-08 15:45 Geert Kuper recirculation  => no
11-11-08 15:45 Geert Kuper Assigned To  => Hans van der Marel
11-11-08 15:45 Geert Kuper Status new => assigned
11-11-08 15:45 Geert Kuper Category telescope => 0.unknown/unspecified
13-11-08 08:47 Bert Woestenburg Project DZB => MFFE
13-11-08 08:48 Bert Woestenburg MFFE  => 00
13-11-08 08:48 Bert Woestenburg RT  => 0
13-11-08 08:48 Bert Woestenburg Assigned To Hans van der Marel => Harm-Jan Stiepel
13-11-08 08:48 Bert Woestenburg Category 0.unknown/unspecified => phase switching
25-11-08 14:22 Jurjen Sluman MFFE 00 => 11
25-11-08 14:22 Jurjen Sluman RT 0 => 7
25-11-08 14:22 Jurjen Sluman polarisation  => Y
25-11-08 14:22 Jurjen Sluman Additional Information Updated
25-11-08 14:24 Jurjen Sluman Note Added: 0000112
25-11-08 14:24 Jurjen Sluman Status assigned => resolved
19-02-09 07:55 Jurjen Sluman Resolution open => fixed