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ID Dateup Author Type Category Subject Text Attachments
  6044   Tue Nov 29 22:10:18 2011 kiwamuUpdateRF SystemRFAM fluctuation reduced


  6045   Tue Nov 29 22:19:26 2011 DenUpdatedigital noisestraight line I tried to understand what part of
the signal is corrupted while passing through
a digital straight line without any filters.
  6046   Tue Nov 29 22:54:49 2011 DenUpdatedigital noisesingle precision In the previous elog we've proved
that signals C1:SUS-MC3_LSC_EXCMON and  C1:SUS-MC3_LSC_OUTMON
are in single precision. Now we try to understand
  6047   Tue Nov 29 23:03:34 2011 ZachUpdateRF SystemRFAM fluctuation reducedI was hesitant to claim that this is definitely
true without the control data we were taking
  6048   Wed Nov 30 01:35:49 2011 JenneUpdateCDSOSEM noise / nullstream and what does it mean for satellitesI'm picking points off of this no-magnet
OSEM plot, and I thought I'd write them down
somewhere so I don't have to do it again
  6049   Wed Nov 30 02:04:26 2011 rana, den, jenne, kiwamu, jzweizigUpdateCDSFiltering Noise issue tracked down ??? You can read through all of our past
tests to see what didn't work in tracking
things down. As Den mentions, there was actually
  6050   Wed Nov 30 03:01:55 2011 kiwamuUpdateRF SystemRFAM fluctuation reducedOkay I have turned ON the temperature control
at 2:40 AM and will leave it ON for a while.

  6051   Wed Nov 30 11:04:26 2011 josephbUpdateCDSFiltering Noise issue tracked down ???


  6052   Wed Nov 30 11:36:12 2011 DenUpdateCDSFiltering Noise issue tracked down ???


  6053   Wed Nov 30 13:52:09 2011 ZachUpdateRF SystemEOM temp stabilization ineffectualThis recent off/on run proved what I was
afraid of: the temperature stabilization
setup appears to do nothing except very near
  6054   Wed Nov 30 14:12:53 2011 JenneUpdateRF SystemNew EOM mount almost readyThe new EOM adapter plate and riser just
got back from the shop.  I just had
Mike do the milling, and I'll drill and tap
  6055   Wed Nov 30 22:09:20 2011 ZachUpdateRF Systemsome final EOM stabilization effortsFirst, things that were done:

    I was troubled by the
odd-looking noise in the EOM temperature
  6056   Thu Dec 1 01:24:56 2011 JenneUpdateRF SystemEOM temp stabilization at PSL lab[Frank, Jenne]
Activities in a far, far away land
called PSL lab...
  6057   Thu Dec 1 03:27:39 2011 MirkoUpdateSUSNot adaptive, still cool

  6058   Thu Dec 1 11:25:10 2011 steveUpdatePEM40m infrastructure holds up well in strong wind condition Santa Anna wind speed was locked
around 60 kmph last night on campus. The
strongest in 30 years.  The lab hold
  6059   Thu Dec 1 12:27:51 2011 ZachMetaphysicsRF SystemRAM diagnosis/suppression plan?It seems like there is some confusion---or
disagreement---amongst the lab about how
  6060   Thu Dec 1 17:33:18 2011 kiwamuUpdateSUSwatchdogs fixedThe watchdogs'
issue has been solved and they are now working
  6061   Thu Dec 1 18:30:39 2011 Vladimir, DenUpdatedigital noiseFoton errorFoton Matlab Error 
We investigated
some more the discrepancy between Matlab
  6062   Fri Dec 2 17:43:46 2011 ranaUpdatedigital noiseFoton errorIt would be useful to see some plots so
we could figure out exactly what magnitude
and phase error correspond to "gross"
  6063   Fri Dec 2 20:16:41 2011 DenUpdatedigital noisefirst order transitionIn order to verify our theory about coherence
corruption in linear systems due to the line
  6064   Sat Dec 3 16:55:52 2011 DenUpdateIOOdigital noise in MCI looked once again to the local OSEM sensors
and MC length signals. Then I replaced 1e-20
to 1e-50 in the if-statement of the iir_filter
  6065   Sat Dec 3 18:29:20 2011 DenUpdateAdaptive FilteringcoherenceI've looked through the coherence between
the MC length and seismometers after the
if-statement problem was fixed. Coherence
  6066   Sun Dec 4 13:56:54 2011 DenUpdateIOOWFSYesterday I locked the MC and left at 8
pm. Analyzing the data I saw that MC was
locked all time from 8 pm to 12.30 am when
  6067   Sun Dec 4 23:49:38 2011 DenUpdateIOOWFS


  6068   Mon Dec 5 02:55:30 2011 DenUpdateAdaptive FilteringC1OAFI've added filter banks for correction
path in the C1OAF model to use AA filters.
 I compiled and installed the new version.
  6069   Mon Dec 5 09:46:21 2011 ZachMetaphysicsRF SystemRAM diagnosis/suppression plan?Since no
one has made any comments
  6070   Mon Dec 5 10:13:13 2011 JenneUpdateAdaptive FilteringC1OAF


  6071   Mon Dec 5 17:44:41 2011 kiwamuUpdateGeneralmy plan tonightI am going
to try handing off the ALS servo to the IR
  6072   Mon Dec 5 19:21:55 2011 kiwamuUpdateLSCcoarse beat note signal : ADC limited above 30 HzThe
signal observed by the coarse frequency discriminator
was actually dominated by the ADC noise above
  6073   Mon Dec 5 19:38:38 2011 JenneUpdateRF SystemEOM mount getting closer....I have drilled all the holes necessary,
and have tapped all but 4 of the holes for
the new EOM mount.  The adapter plate
  6074   Tue Dec 6 00:26:00 2011 kiwamuUpdateLSCALS became robust : UGF = 100 HzEventually
the instability in the Y end PDH servo turned
out to be some kind of an alignment issue.
  6075   Tue Dec 6 00:58:34 2011 DenUpdateWienerFilteringOAF current goalAfter reducing the digital noise I did
offline Wiener filtering to see how good
should be online filter. I looked at the
  6076   Tue Dec 6 02:57:44 2011 kiwamuUpdateGreen Locking1st trial of handing offI
succeeded in handing off the servo from that
of the ALS to IR-PDH.
  6077   Tue Dec 6 21:37:08 2011 JenneUpdateRF SystemNew EOM mount in placeEOM
is remounted on the fancy-pants new mount
that I crafted.  EOM is also aligned. 
  6078   Wed Dec 7 00:11:58 2011 DenUpdateAdaptive FilteringOfflineAF I did offline adaptive filtering
with yesterday's 3 hours of MC-F and GUR1X
data. It turns out that normalized-lms can
  6079   Wed Dec 7 00:48:58 2011 kiwamuUpdateRF SystemRealigned incindent pointing to MCActually it was already in a good place.
just realigned the zig-zag mirrors on the
PLS table to bring the entire beam axis a
  6080   Wed Dec 7 02:55:38 2011 kiwamuUpdateGreen Lockinglocking activity tonightNo
real progress.
  6081   Wed Dec 7 09:56:14 2011 rana imitation of steveOmnistructureEnvironmentTelephone Map This is the fone
  6082   Wed Dec 7 18:47:36 2011 JenneUpdateRF SystemRAM Mon is now being demodulatedThere were 2 open outputs on the splitter
in the RAMmon (formerly known as Stochmon)
  6083   Wed Dec 7 20:55:44 2011 Vladimir, DenUpdatedigital noiseMatlab error


  6084   Thu Dec 8 00:04:50 2011 ranaUpdateIOORAM Mon is now being demodulatedMonitoring good, but remember that the
EOM alignment must be done carefully to minimize
the RAM before we can use these trends.
  6085   Thu Dec 8 00:18:38 2011 ranaSummaryComputer Scripts / ProgramsBURT restore problems / issues in snapshot scriptsI tried to run the seismic StripTool tonight,
which seems liek a simple task. But instead
I fell through the rabbit hole again...
  6086   Thu Dec 8 00:45:13 2011 KojiUpdateRF System4ch demod is readyI have tested the left 2ch of 4ch demod
The left most is for 11MHz, and the
  6087   Thu Dec 8 01:26:31 2011 ZachUpdateRF SystemEOM temp sensor modifiedI
have modified the EOM temperature sensor
  6088   Thu Dec 8 11:59:53 2011 ZachUpdateRF Systemfringing indeedHere is a trend of 11 & 55 I&Q,
along with the EOM temperature and PSL RMTEMP
  6089   Thu Dec 8 14:47:28 2011 JenneUpdateIOOEOM aligned to minimize RAM

  6090   Thu Dec 8 16:54:05 2011 JenneUpdateRF SystemInstallation of new demod boxSo far:
* New demod box has been placed in
the LSC rack.
  6091   Thu Dec 8 19:48:23 2011 kiwamuUpdateCDSrestarted c1lsc machine and daqdSince the c1lsc machine became frozen I
restarted the c1lsc machined and daqd.
Then I burtrestored c1lsc, c1ass
  6092   Thu Dec 8 22:44:55 2011 KojiUpdateRF System4ch demod test result1) Linearity Test
LO input level was +10dBm. The LO
freq was 11MHz and 55MHz for CH1 and CH2
  6093   Fri Dec 9 13:28:09 2011 DenUpdateAdaptive FilteringC1OAFI tried to figure out why red NO SYNC label
became present in the C1OAF_GDS_TP screen
after I added AA filters to the C1OAF model.
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