 Mon Apr 13 18:57:03 2009, Alberto, Frogs, Computers, GPIB/ETH Interface Troubles 
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I really don't understand why my programs that I used to use to get data from the HP Spectrum Analyzer and the Marconi frequency generator don't work
anymore.
I spent hours trying to debug the code but I can't sort the problem out. |
 Tue Apr 14 12:10:11 2009, Alberto, Frogs, Computers, GPIB/ETH Interface Troubles
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Quote:
I really don't understand why my programs that I used to use to get data from the HP Spectrum Analyzer and the Marconi |
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Sat Aug 15 18:35:14 2009, Clara, Frogs, Computers, How far back is complete data really saved? (or, is the cake a lie?)
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I was told that, as of last weekend, we now have the capability to save full data for a month, whereas before it was something like 3 days. However,
my attempts to get the data from the accidentally-shorted EW2 channel in the Guralp box have all been epic failures. My other data is okay, despite my
not saving it for several days after it was recorded. So, my question is, how long can the data actually be saved, and when did the saving capability change? |
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Mon Oct 5 09:31:05 2009, Alberto, Frogs, PSL, PSL laser accidentally turned off
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Alberto, Steve,
While I was moving a cart near by the PSL table I pushed the red emergency button that turns off the PSL laser. We had to unlock the button and
then power cycle the laser driver to turn the laser back on. |
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Mon Nov 9 16:32:36 2009, Alberto, Frogs, Environment, Shot of the white board yesterday before erasing
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Yesterday Rana and I needed some room on the white board in the Control Room. We had to erase some of the stuff present on the board despite the bif
warning "Do Not Erase".
This is how it looked like before erasing. |
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Mon Nov 9 18:27:30 2009, Alberto, Frogs, Computers, OMC DCPD Interface Box Disconnected from the power Supply
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This afternoon I inadvertently disconnected one of the power cables coming from the power supply on the floor next to the OMC cabinet and going to the
DCPD Interface Box.
Rob reconnected the cable as it was before. |
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Wed Nov 11 12:29:44 2009, Alberto, Frogs, PSL, MC Locked on the wrong mode?
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This morning, after Steve pointed out that the readout RFAMPD_DC was zero, I thought of realigning the beam on the photodiode. Maybe I touched the lens
or the beam splitter that send the beam on the diode when I installed an other beam splitter to make the measurement of the calibration between two ThorLabs
PDA255 photodiodes. |
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Thu Nov 19 08:53:12 2009, pete, Frogs, Environment, diesel fumes
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Instead of doing RCG stuff, I went to Millikan to work on data analysis as I couldn't stand the fumes from the construction. (this morning,
8am) |
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Thu Dec 10 08:43:25 2009, steve, Frogs, Environment, diesel fumes are less
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Quote:
Instead of doing RCG stuff, I went to Millikan to work on data analysis as I couldn't stand the fumes from |
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Tue Feb 2 15:30:03 2010, Alberto, Frogs, Treasure, Wild Oats
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FYI. Sitting on the top shelf of George I found an opened jar of raspberry jam and an opened jar of creamy peanut butter. Both are branded Wild Oats
Market.
Wikipedia:
"Wild Oats Markets was an operator of natural foods stores and farmers markets
in North America... Whole Foods officially completed their buyout of Wild Oats on August 27, 2007 [...]" |
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Fri May 28 07:13:05 2010, Alberto, Frogs, Green Locking, SR785 found abandoned next to the workbenches
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A poor lonely SR785 was found this morning roaming around in the lab in evident violation of the fundamental rule which requires all the equipment on
carts to be brought back inside the lab right after use.
The people and the professors related to the case should take immediate action to repair for their misdeed. |
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Tue Jun 29 08:55:18 2010, Jenne, Frogs, Environment, We're being attacked!
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We're going to have to reinstate the policy of No food / organic trash |
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Fri Aug 13 15:29:35 2010, Aidan, Frogs, Photos, Here's the 40m team
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Mon Aug 16 13:33:06 2010, Zach, Frogs, Photos, Here's the 40m team
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| One day I'll get to be part of the krew |
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Thu Sep 2 01:48:23 2010, Jenne, Frogs, Treasure, Not cool....
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This totally creeped me out when I found it wandering around on the floor not so far from my desk:
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Fri Sep 3 11:03:41 2010, Alberto, Frogs, Electronics, Cable cutting tools
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I found this very interesting German maker of cool cable cutting tools. It's called Jokari.
We should keep it as a reference for the future if we want to buy something like that, ie RF coax cable cutting knives.
http://www.jokari.de/en.htm |
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Fri Sep 3 13:04:30 2010, Koji, Frogs, Electronics, Cable cutting tools
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Yeah, this looks nice.
And I also like to have something I have attached. This is "HOZAN P-90", but we should investigate American ones
so that we can cut the wires classified by AWG. |
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Thu Sep 23 10:34:20 2010, rana, Frogs, Computers, nodus gracefully rebooted
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SVN down
mafalda down
I am guessing that the NFS file system hangup may have caused some machines to get into an awkward state. We may be best off doing a controlled |
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Thu Sep 23 11:15:20 2010, Koji, Frogs, Computers, nodus gracefully rebooted
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svn is back after starting apache on nodus.
http://lhocds.ligo-wa.caltech.edu:8000/40m/ApacheOnNodus
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Thu Sep 23 13:16:57 2010, Koji, Frogs, Computers, nodus gracefully rebooted
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mafalda is up now.
I found that the cable for mafalda (the sole red cable) had a broken latch.
The cable was about falling off from the switch. As a first-aid, I used this |
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Fri Oct 8 17:36:16 2010, steve, Frogs, Photos, visiting undergrads
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| Prof Alan Weistein guided the 24 student through the 40m. His performance was rated as an enthusiastic 9.5 |
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Thu Feb 17 23:41:46 2011, rana, Frogs, DAQ, Frames Directory got the wrong name: Data unreachable
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DTT stopped working for recent data. An 'ls' in the frames/full/ directory reveals:
drwxr-xr-x 2 controls controls 258048 Feb 3 12:26 9807
drwxr-xr-x 2 controls controls 258048 Feb 4 16:13 9808 |
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Fri Mar 25 01:27:29 2011, mevans, Frogs, Green Locking, digital frequency counting
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Today we tried the Schmitt trigger DFD, and while it works it does not improve the noise performance. At least part of our problem is coming from
the discrete nature of our DFD algorithm, so I would propose that an industrious day job person codes up a new DFD which avoids switching. We can
probably do this by mixing the input signal (after high-passing) with a time-delayed copy of itself... as we do now, but without the comparator. |
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Fri Mar 25 11:16:19 2011, josephb, Frogs, Green Locking, digital frequency counting
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I modified the c1gfd.mdl simulink model. I made a backup as c1gfd_20110325.mdl.
The first change was to use a top_names block to put everything in. The block is labeled ALS. So all
the channels will now be C1:ALS-GFD_SOMETHING. This means medm channel names will need to be updated. Also, the filter modules need to be updated |
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Mon Mar 28 16:19:23 2011, steve, Frogs, Photos, visithing 5th graders
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| Suresh is captivating his audience with gravity waves on last Friday, March 25 |
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Mon May 2 13:43:05 2011, steve, Frogs, Photos, birthday boys
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| .....Happy.... Birthday.... to.... Joseph... and... Jamie...Happy....Birthday..... to.... You............sing with us........Happy Birthday.....to you |
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Tue May 3 15:59:22 2011, steve, Frogs, Photos, X-mas comes early
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The little red all terrain cargo wagon 40" x 18" has just arrived on pneumatic wheels.
Model #29, 200 lbs max load at 26 PSI, minimum age requirement 1.5 years |
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Fri Jul 22 17:01:41 2011, Iron Man, Frogs, General, Proof that Alberto lived through his Iron Man!
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Wed Nov 28 21:42:21 2012, rana, Frogs, Computer Scripts / Programs, dataviewer font error
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An error this evening on rossa: dataviewer not working due to some font errors:
controls@rossa:~ 0$ dataviewer
Connecting.... done |
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Mon Jan 28 21:36:44 2013, tall guy, Frogs, General, small people on notice
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| If I catch anyone putting small booties into the large bootie bin, I will make said person eat small booties. |
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Tue Jan 29 10:59:37 2013, lazy person, Frogs, General, better plan
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I propose we work around this problem with giant
flip-flops. These are in the vein of the take-off-your-shoes-and-put-on-Crocs, without the taking off your shoes part. They're a little |
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Tue Jan 29 15:16:18 2013, Manasa, Frogs, General, trial run
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I would like to suggest a trial run on these....Ergomates and the cleanboot! |
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Wed Jan 30 16:24:25 2013, Manasa, Frogs, General, trial run
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Quote:
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Fri Mar 29 19:23:49 2013, Gabriele, Jenne, Frogs, LSC, Analog whitening filter of REFL55 not switching
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We discovered that the analog whitening filter of the REFL55_I board is not switching when we operate the button on the user interface. We checked with
the Stanford analyzer that the transfer function always correspond to the whitening on.
The digital one is actually switching. We decided to keep the digital de-whitening on to compensate for the analog one. Otherwise we get a very |
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Fri Mar 29 19:58:24 2013, Gabriele, Jenne, Frogs, LSC, Analog whitening filter of REFL55 not switching
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Quote:
We discovered that the analog whitening filter of the REFL55_I board is not switching when we operate the button on the user interface. We |
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Mon Apr 1 16:24:09 2013, Jamie, Frogs, LSC, PD whitening switching fixed (loose connection at break-out box)
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Quote:
We discovered that the analog whitening filter of the REFL55_I board is not switching when we operate the button on the user interface. We |
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Tue May 7 19:58:28 2013, rana, Frogs, Treasure, rabbitt whole
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controls@rosalba:/opt/rtcds/caltech/c1/medm/c1ioo/master/master/master
0$ ls
C1IOO_LKIN_OUT_MTRX.adl C1IOO_MC_ASS_LOCKIN5.adl C1IOO_WFS1_I.adl |
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Wed Sep 25 17:07:08 2013, rana, Frogs, Treasure, Free Green Mango Juice in fridge
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its an acquired taste, but its a must since we're sending an interferometer to India |
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Sun Oct 6 22:27:35 2013, rana, Frogs, Electronics, MC3 LL sensor cable was loose
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I noticed that the MC3 LL sensor was apparently dead according to its suspension screen. Since it was only the fast ADC channel and not the SLOW PDmon,
I could tell that it was just in the ADC cabling. I pushed in a few of the MC3 sensor cables on the front and back of the PD whitening board and it came
back OK. According to this trend of the past 40 days and 40 nights, it started slipping on this past Wednesday morning. |
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Tue Nov 5 16:47:19 2013, rana, Frogs, LSC, illegal power supply about to expire
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Is this your illegally installed HP bench power supply?
If so, or if not but you care about the signal that passes through these amplifiers, |
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Tue Nov 5 17:12:48 2013, Jenne, Frogs, LSC, illegal power supply about to expire
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Quote:
Is this your illegally installed HP bench power supply?
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Wed Nov 6 14:47:41 2013, Steve, Frogs, LSC, Din connectors added at 1Y2
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The north side of the LSC rack is full. I installed more DIN connectors with fuses on the south side of the rack 1Y2
The access to this may be a little bit awkward. You just remove the connector, wire it and put it back in.
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Wed Feb 5 18:36:56 2014, rana, Frogs, elog, MicroSoft BingBot is attacking us
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The ELOG was frozen, with this in the .log file:
GET /40m/?id=1279&select=1&rsort=Type HTTP/1.1
Cache-Control: no-cache |
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Mon Mar 24 19:42:12 2014, Charles, Frogs, VAC, Power Failure
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The 40m experienced a building-wide power failure for ~30 seconds at ~7:38 pm today.
Thought that might be important... |
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Fri May 16 20:55:18 2014, Jamie, Frogs, lore, un-full-screening Ubuntu windows with F11
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Last week Rana and I struggled to figure out how to un-full-screen windows on the Ubuntu workstations that appeared to be stuck in some sort of full
screen mode such that the "Titlebar" was not on the screen. Nothing seemed to work. We were in despair.
Well, there is now hope: it appears that this really is a "fullscreen" mode that can be activated by hitting F11. |
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Thu Jun 12 11:03:11 2014, Koji, Frogs, General, World Cup Soccer 2014
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Thu Jun 12 12:30:50 2014, den, Frogs, General, World Cup Soccer 2014
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Quote:
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Thu Jul 31 18:54:03 2014, Chris, Frogs, elog, MicroSoft BingBot is attacking us
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Quote:
The ELOG was frozen, with this in the .log file: |
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Thu Jul 31 21:21:49 2014, Koji, Frogs, elog, MicroSoft BingBot is attacking us
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Oh, this is cool! Thanks!
I could not figure out how to place robot.txt as it was not so obvious how elogd handles the files in the "logfile" directory. |
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Fri Sep 26 11:44:55 2014, nicolas, Frogs, Computer Scripts / Programs, Loaded larry's fake filter into C1:ALS-OFFSETTER2
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Larry and Nicolas
Larry's transfer function measurements suddenly started returning 0dB 0degrees when before there was some fake filter in the C1:ALS-OFFSETTER2
filter bank. |