You are here:
NRAO Public Wiki
TGBT15A_915_146 - LBW bof file verification
* Verify the LBW BOF that will be used for pulsar modes. This will be done by actually passing it through the spectral line HPC backend.
Session begins at 11:00 AM
Will first test 100 MHz pulsar BOF (vpm_lbw_0100_2016_Apr_21_1156.bof) by running it in MODE7
SB at 11:08
Scan is number 78
Scan ran without issue.
GBTIDL say all data are blanked, though the data tables seem to have non-zero values. Must be some issue with the switching signal.
Data are nans when opened with astropy.
Trying again but with switching set to tp_nocal, so there is only one phase and no blanking
Scan is number 79
No runtime issues
Data are nans again
Double checking original spectral line BOF file
Scan is number 80
No issues with this one
FITS state tables seem to be the same
Randy and Jason are checking the switching signal control in the new BOF file
The spec tick parameter is set to shortest possible resolution. This may be interfering with the daq software interpretation of the switching signals.
Took another scan (81) with spectral line BOF to check data display webpage.
Trying pulsar BOF but looking at the data display webpage (not sure where it intercepts the data...)
Scan is #82
Data still blanked in data display
Will test the 200 MHz pulsar BOF (vpm_lbw_0200_2016_Apr_21_1328.bof) by running it in MODE6
Scan is #83
No runtime issues, but data are still blanked
Break for lunch
Talked to Joe and Ray. Suggested checking INTEGRAT table. It is, indeed, all zeros. Will therefore set the "normalize_data" flag in vegas.conf to "false" to prevent dividing by INTEGRAT
Trying MODE6 again
"NORMALZD" keyword is zero in shmem, so it seems like the config file change was accepted
Scan is #84
Will try MODE7 without normalization
Scan is #85
Going to take two scans in each mode with the Archivist recording filtersnaps just in case we can play around with that data
Scans are number 86 and 87 (MODE7 and MODE6)
Returned vegas.conf to normal. Confirmed that BOF files and normalization flag are being read correctly with the production values.
Session ended at 12:53
Packet flow and balancing looked good with new BOF files, but for some reason the data is coming out nans. Will need to investigate switching signals and try again.
iew wiki text
ore topic actions
Topic revision: r1 - 2018-05-15,
Create New Topic
Copyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding NRAO Public Wiki?