| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
6044
|
Tue Nov 29 22:10:18 2011 |
kiwamu | Update | RF System | RFAM fluctuation reduced |
|
|
|
6045
|
Tue Nov 29 22:19:26 2011 |
Den | Update | digital noise | straight 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 |
Den | Update | digital noise | single 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 |
Zach | Update | RF System | RFAM fluctuation reduced | I was hesitant to claim that this is definitely
true without the control data we were taking |
|
|
6048
|
Wed Nov 30 01:35:49 2011 |
Jenne | Update | CDS | OSEM noise / nullstream and what does it mean for satellites | I'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, jzweizig | Update | CDS | Filtering 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 |
kiwamu | Update | RF System | RFAM fluctuation reduced | Okay 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 |
josephb | Update | CDS | Filtering Noise issue tracked down ??? |
|
|
|
6052
|
Wed Nov 30 11:36:12 2011 |
Den | Update | CDS | Filtering Noise issue tracked down ??? |
|
|
|
6053
|
Wed Nov 30 13:52:09 2011 |
Zach | Update | RF System | EOM temp stabilization ineffectual | This 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 |
Jenne | Update | RF System | New EOM mount almost ready | The 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 |
Zach | Update | RF System | some final EOM stabilization efforts | First, things that were done:
I was troubled by the
odd-looking noise in the EOM temperature |
|
|
6056
|
Thu Dec 1 01:24:56 2011 |
Jenne | Update | RF System | EOM 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 |
Mirko | Update | SUS | Not adaptive, still cool |
|
|
|
6058
|
Thu Dec 1 11:25:10 2011 |
steve | Update | PEM | 40m 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 |
Zach | Metaphysics | RF System | RAM 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 |
kiwamu | Update | SUS | watchdogs fixed | The watchdogs'
issue has been solved and they are now working |
|
|
6061
|
Thu Dec 1 18:30:39 2011 |
Vladimir, Den | Update | digital noise | Foton error | Foton Matlab Error
We investigated
some more the discrepancy between Matlab |
|
|
6062
|
Fri Dec 2 17:43:46 2011 |
rana | Update | digital noise | Foton error | It 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 |
Den | Update | digital noise | first order transition | In order to verify our theory about coherence
corruption in linear systems due to the line
|
|
|
6064
|
Sat Dec 3 16:55:52 2011 |
Den | Update | IOO | digital noise in MC | I 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 |
Den | Update | Adaptive Filtering | coherence | I'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 |
Den | Update | IOO | WFS | Yesterday 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 |
Den | Update | IOO | WFS |
|
|
|
6068
|
Mon Dec 5 02:55:30 2011 |
Den | Update | Adaptive Filtering | C1OAF | I'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 |
Zach | Metaphysics | RF System | RAM diagnosis/suppression plan? | Since no
one has made any comments |
|
|
6070
|
Mon Dec 5 10:13:13 2011 |
Jenne | Update | Adaptive Filtering | C1OAF |
|
|
|
6071
|
Mon Dec 5 17:44:41 2011 |
kiwamu | Update | General | my plan tonight | I am going
to try handing off the ALS servo to the IR |
|
|
6072
|
Mon Dec 5 19:21:55 2011 |
kiwamu | Update | LSC | coarse beat note signal : ADC limited above 30 Hz | The
signal observed by the coarse frequency discriminator
was actually dominated by the ADC noise above |
|
|
6073
|
Mon Dec 5 19:38:38 2011 |
Jenne | Update | RF System | EOM 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 |
kiwamu | Update | LSC | ALS became robust : UGF = 100 Hz | Eventually
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 |
Den | Update | WienerFiltering | OAF current goal | After 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 |
kiwamu | Update | Green Locking | 1st trial of handing off | I
succeeded in handing off the servo from that
of the ALS to IR-PDH. |
|
|
6077
|
Tue Dec 6 21:37:08 2011 |
Jenne | Update | RF System | New EOM mount in place | EOM
is remounted on the fancy-pants new mount
that I crafted. EOM is also aligned. |
|
|
6078
|
Wed Dec 7 00:11:58 2011 |
Den | Update | Adaptive Filtering | OfflineAF | 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 |
kiwamu | Update | RF System | Realigned incindent pointing to MC | Actually it was already in a good place.
I
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 |
kiwamu | Update | Green Locking | locking activity tonight | No
real progress. |
|
|
6081
|
Wed Dec 7 09:56:14 2011 |
rana imitation of steve | Omnistructure | Environment | Telephone Map | This is the fone
storree |
|
|
6082
|
Wed Dec 7 18:47:36 2011 |
Jenne | Update | RF System | RAM Mon is now being demodulated | There were 2 open outputs on the splitter
in the RAMmon (formerly known as Stochmon) |
|
|
6083
|
Wed Dec 7 20:55:44 2011 |
Vladimir, Den | Update | digital noise | Matlab error |
|
|
|
6084
|
Thu Dec 8 00:04:50 2011 |
rana | Update | IOO | RAM Mon is now being demodulated | Monitoring 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 |
rana | Summary | Computer Scripts / Programs | BURT restore problems / issues in snapshot scripts | I 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 |
Koji | Update | RF System | 4ch demod is ready | I have tested the left 2ch of 4ch demod
board.
The left most is for 11MHz, and the |
|
|
6087
|
Thu Dec 8 01:26:31 2011 |
Zach | Update | RF System | EOM temp sensor modified | I
have modified the EOM temperature sensor |
|
|
6088
|
Thu Dec 8 11:59:53 2011 |
Zach | Update | RF System | fringing indeed | Here is a trend of 11 & 55 I&Q,
along with the EOM temperature and PSL RMTEMP
signals. |
|
|
6089
|
Thu Dec 8 14:47:28 2011 |
Jenne | Update | IOO | EOM aligned to minimize RAM |
|
|
|
6090
|
Thu Dec 8 16:54:05 2011 |
Jenne | Update | RF System | Installation of new demod box | So far:
* New demod box has been placed in
the LSC rack. |
|
|
6091
|
Thu Dec 8 19:48:23 2011 |
kiwamu | Update | CDS | restarted c1lsc machine and daqd | Since 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 |
Koji | Update | RF System | 4ch demod test result | 1) 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 |
Den | Update | Adaptive Filtering | C1OAF | I 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. |
|