0000194: Because of LO locking problem the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm/21cm quite often.
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ID Category Severity Reproducibility Date Submitted Last Update
0000194 [MFFE] 0.unknown/unspecified major sometimes 07-12-09 14:15 03-02-10 10:57
Reporter Yuan Tang View Status public  
Assigned To Harm-Jan Stiepel
Priority normal Resolution fixed  
Status resolved  
Summary 0000194: Because of LO locking problem the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm/21cm quite often.
Description For unknown reason the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls
at 92cm quite often. (see 10905500-10905502,10905508-10905510.)
Additional Information 20091228:
The cross correlations of 7X*X,7Y*Y have no Ampls, which happened
quite a few times at Lband.
(The MFFE-05/RT7 worked at wrong frequency, the LO lock problem?)
MFFE 05
RT 7
MFFE-band 92cm
polarisation X, Y
sky frequency (MHz)
Attached Files

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- Notes
(0000224)
Yuan Tang
15-01-10 12:48

 20100115:
On RT7 the telescope the LO reference cable had been changed from the yellow
one to the green one. Hope it will solve the LO locking problem around -HA90 deg.
 
(0000240)
Harm-Jan Stiepel
03-02-10 10:57

 De telescop LO Referentiekabel GEEL is op 14 jan. verwisseld met GROEN.
 

- Issue History
Date Modified Username Field Change
07-12-09 14:15 Yuan Tang New Issue
07-12-09 14:15 Yuan Tang MFFE  => 05
07-12-09 14:15 Yuan Tang RT  => 7
07-12-09 14:15 Yuan Tang MFFE-band  => 92cm
07-12-09 14:15 Yuan Tang polarisation  => X, Y
07-12-09 14:16 Yuan Tang Assigned To  => Harm-Jan Stiepel
07-12-09 14:16 Yuan Tang Status new => assigned
29-12-09 08:45 Yuan Tang Summary For unknown reason the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm quite often. => For unknown reason the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm/21cm quite often.
29-12-09 08:45 Yuan Tang Additional Information Updated
14-01-10 10:33 Yuan Tang Summary For unknown reason the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm/21cm quite often. => Because of LO locking problem the cross correlations of 7X*X,7Y*Y(MFFE-05) have no Ampls at 92cm/21cm quite often.
15-01-10 12:48 Yuan Tang Note Added: 0000224
15-01-10 12:48 Yuan Tang Status assigned => testing
03-02-10 10:57 Harm-Jan Stiepel Note Added: 0000240
03-02-10 10:57 Harm-Jan Stiepel Status testing => resolved
03-02-10 10:57 Harm-Jan Stiepel Resolution open => fixed