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TGBT14A_912_12 - Bank H Balance Tests / Sawtooth problem tests
Remove attenuator from output of VEGAS IF module in Bank H
Check for the "sawtooth" problem
Run an SB which failed balanced before - RRLMode11TP_nodata - configures all Banks, but doesn't take data
All balance ok, apart from Bank H adcpwr2 (J16) - sits at -38dB
Jason takes a 15dB pad out from the ADC end of Bank H, J16. Now at -24dB. Try balancing again.
No change. Jason takes out 10dB pad from the other end of the cable.
Can now balance ok.
Run RRLMode3TP, Mode4TP, Mode10TP in succession, looking for "sawtooth" data.
Starts at scan 1... already have the problem.
Abort Scan 2, conform parameters
Scan 3 Mode3TP - still there (from data display)
Turn Manager Off and On...
Scan 4 Mode3TP - still there
Go home for lunch and come back again. Check it is still there...
Scan 5 Mode3TP - still there
Try switching to Mode 4 TP
Scan 6/7 Mode 4 - looks fine
Back to Mode 3
Scan 8 - problem is there still
Restart Bank A only - see if the problem is still there.
Scan 9 Mode 3 still there
Ray restarts the bank A Roach
Scan 10 Mode 3 still there.
Scan 11 - still there (NB this is cross, so need to look at plnum 2 and 3).
Ray puts in a different HPC program
Scan 12 Mode3_different - still screwed up.
Ray tries a different BOF File (from April)
Scan 13 Mode3_different with Bank A only
Ray switches back to original BOF file
Scan 14 - problem is still there.
Ray power-cycles the Roach
Scan 15 - bad again
Ray tries the old BOF again
Scan 16 - looks good!!!!
Revert to config files from 18th July
Scan 17 - looks good! - using the new BOF (July 15 version)
Ray keeps trying things most (all?) of scans 18-26, with different combinations, look bad.
Ray puts everything back to normal (latest version)
Scan 27 - still bad.
Pack in for the day....
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Topic revision: r4 - 2015-01-27,
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