 Mon Jul 13 00:53:50 2009, Alberto, DAQ, Computers, All computers down
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Quote:
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 Wed Jul 15 17:18:24 2009, Jenne, DAQ, Computers, DAQAWG gone, now back
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Yet again, the DAQAWG flipped out for an unknowable reason. In order of restart activities listed on the Wiki, I keyed the crate and nothing really
happened, then I hit the physical reset button and nothing happened, and then I did the 'telnet....vmeBusReset', and a couple minutes later, it was all
good again. |
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Tue Jul 21 17:01:18 2009, pete, DAQ, DAQ, temp channel PEM-PETER_FE
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I added a temporary channel, to input 9 on the PEM ADCU. Beware the 30, 31, and 32 inputs. I tried 32 and it only gave noise.
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Wed Aug 5 07:33:04 2009, steve, DAQ, Computers, fb40m is down
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Wed Aug 5 09:25:57 2009, Alberto, DAQ, Computers, fb40m is up
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| FB40m up and running again after restarting the DAQ. |
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Wed Aug 5 15:33:05 2009, rob, alberto, DAQ, General, can't get trends
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We can't read minute trends from either Dataviewer or loadLIGOData from before 11am this morning.
fb:/frames>du -skh minute-trend-frames/ |
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Thu Aug 6 09:22:17 2009, Alberto, DAQ, General, can't get trends
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Quote:
We can't read minute trends from either Dataviewer or loadLIGOData from before 11am this morning. |
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Tue Dec 8 10:20:33 2009, Alberto, DAQ, Computers, Bootfest succesfully completed
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Alberto, Kiwamu, Koji,
this morning we found the RFM network and all the front-ends down.
To fix the problem, we first tried a soft strategy, that is, we tried to restart CODAQCTRL and C1DCUEPICS alone, but it didn't work. |
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Mon May 3 19:21:43 2010, Alberto, DAQ, Environment, Boot fest
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[Alberto, Koji, Rana]
The RFM network failed today. We had to reboot the frame builder anf restart all the front end following the instructions for the "Nuclear
Option". |
Wed Jun 2 18:36:20 2010, valera, DAQ, CDS, Noise generators in LSP 
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Alex wrote a new code to implement LSP noise generator. The code is based on 64 bit random number generator from Numerical Recipes 3rd ed ch 7.1 (p 343).
Joe made two instances in the LSP model.
The attached plot shows the spectra and coherence of two generators. The incoherence is ~1/Navg - statistically consistent with no coherence. |
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Sat Jun 19 17:31:48 2010, rana, DAQ, CDS, Excess Noise in C1:IOO-MC_DRUM1 fixed by reboot
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I was getting an excess noise in the C1:IOO-MC_DRUM1 channel - it was a flat spectrum of 10 cts/rHz (corresponding
to 600 uV/rHz).
I tried a few things, but eventually had to power cycle the crate with c1iovme in order to recover the standard ADC noise level of 3x10^-3 |
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Thu Jun 24 18:47:26 2010, Frank, DAQ, IOO, VME crate rebooted
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we had to reboot the IOO VME crate right before lunch as the DAQ wasn't
working correct meaning showing no real signals anymore, only strange noise. The framebuilder and everything else was working fine at that time.
The channel used for the phase noise measurement stopped showing any useful signal right after midnight, |
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Thu Dec 6 15:21:59 2007, alberto, Frogs, Electronics, RF Transfer Function of Stiff Aluminum Wires
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| Transfer function of 3cm long Aluminum wires and of 3cm stranded wires |
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Wed Dec 12 22:24:48 2007, tobin, Frogs, PEM, weather station
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I poked at the weather station briefly this evening.
* There's almost nothing in the elog about it.
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Sun Feb 24 10:51:58 2008, tf, Frogs, Environment, 40m in phdcomics?
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| [url=http://www.phdcomics.com/comics/archive.php?comicid=977][img]http://www.phdcomics.com/comics/archive/phd021308s.gif[/img][/url] |
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Fri Jun 27 09:20:15 2008, steve, Frogs, PEM, dust particle count is up & alarm handler is on
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This 3 years plot show the trend of seasons.
When outside air quality goes bad ( 0.5 micron > 1 million ) the lab follows.
I will demonstrate this effect with a 4th of July fire works calibration.
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Mon Jul 14 10:57:00 2008, Koji, Frogs, Environment, Someone at 40M sent LHO water of life
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Someone at the 40m sent Mike@LHO a pound of peets coffee with the name of Koji Arai.
It was a good surprise! Thanks, we will enjoy it!
I will return to Pasadena next week. See you then. |
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Mon Aug 25 11:43:55 2008, Yoichi, Frogs, IOO, MC REFL PD cable had been disconnected through out the weekend
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Most of my morning was wasted by the MC REFL PD cable, which was disconnected on the generic LSC PD interface board.
I know who did this. *ME*. When I pulled out the MC board, which is sitting next to the PD interface, on Friday, I must have
disconnected the PD cable accidentally. The connector of the PD cable (D-Sub) does not have screws to tighten and easily comes off.
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Mon Sep 22 15:02:45 2008, rana, Frogs, Treasure, Mantis found outside the 40m door at night
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Tue Feb 3 15:01:38 2009, Alberto, Frogs, Computers, megatron slow?
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I notice that Megatron is slower than any other computer in running code that invokes optickle or looptickle (i.e. three times slower than Ottavia). Even
without the graphics.
Has anyone ever experienced that? |
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Thu Feb 5 16:21:07 2009, Jenne, Frogs, Computers, Belladonna connects to the wireless Martian network again
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Symptoms: Belladonna could not (for a while) connect to the wireless network, since there was a driver problem for the wireless card.
This (I believe) started when Yoichi was doing updates on it a while back.
The system: Belladonna is a Dell Inspirion E1505 laptop, with a Broadcom Corporation Dell Wireless 1390 WLAN Mini-PCI Card (rev 01) |
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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. |
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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 |