You are here:
NRAO Public Wiki
TGBT14A_912_71 - Continued VEGAS bank discrepancy tests
This was all done with the wrong (release) version of the Manager... This will have screwed up the Balancing._
Running 121 BOF; Joe switches systems
run bank_gain_mode4_kfpa - configures E,F,G,H
run balance - gets the correct answer for IF, but fails for VEGAS - maybe because of new BOF
correct value is around 500000 = 2**19 - quite different from in simulator, presumably because IF passband is flat?
set 500000 to all of banks E,F,G,H
CM values range from ~ 2 to 13dB, for -20dBm at VEGAS. Run VEGAS target from -34 to -14 - won't always balance.
leave lbw_gain fixed
Scans 1 - 11
Suddenly there is much more power in the converter module outputs??? But stop here anyway.
VEGAS balance wasn't very optimal (some target values were quite off). Run checkLinearityDB by just running the converter rack through its full range of values from 0 - 30dB.
All scans after this point have no archivist files.
(bug in checkLinearityDB procedure)
Scan 12 - forgot to configure
Scan 13 = 0dB
Scan 14 = 1dB etc
Scan 39 = 26dB has a huge peak in power - like someone walked through the beam or something?
Mechanics are greasing the turret...
Scan 42 has a big swing in power through it...
Scan 43 = 30dB
Decide that switching will be confusing. At the end of this, run with total power (no switching) Run checkLinearityDB with 3dB steps
Scan 44 = 0dB
Scan 48 bank E one pol has a divot out of it...
Scan 50 is horrible...
Scan 54 = 30dB
Forgot to re-add Archivist after running configure!
Joe reverts the BOF file to regular
Run eso558_vegas to make sure everything is working correctly.
Scan 55 - all looks ok.
iew wiki text
ore topic actions
Topic revision: r3 - 2015-02-22,
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?