ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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190
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Thu Dec 13 12:05:36 2007 |
alberto | Omnistructure | Electronics | The new Butterworth seems to work quite well | It works better probably because of the small
inductors I'm using this time.
The peak is at 30 MHz because I didn't have |
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189
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Wed Dec 12 22:24:48 2007 |
tobin | Frogs | PEM | weather station | I poked at the weather station briefly this
evening.
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188
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Wed Dec 12 16:22:22 2007 |
alberto | Omnistructure | Electronics | LC filter for the RF-AM monitor circuit | In the LC configuration (see attached schematic)
the resonant frequency is tuned to one of
the peak of our RF-AM monitor and it is amplified |
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187
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Mon Dec 10 20:35:59 2007 |
tobin | Configuration | Computer Scripts / Programs | autolocking scripts | I added this tidbit of csh code to the MZ
autolocker to prevent multiple copies from
running (on one computer):
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186
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Mon Dec 10 19:08:03 2007 |
tobin | Configuration | PSL | MZ | The MZ seems finicky today--it keeps unlocking
and relocking.
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185
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Mon Dec 10 18:42:20 2007 |
tobin | Update | PSL | ISS RIN script | I wrote a script to measure the ISS RIN.
The script uses the "labca" interface (described
in an [url=http://dziban.ligo.caltech.edu:40/40m/117]earlier |
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184
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Mon Dec 10 13:54:26 2007 |
rob | HowTo | Computer Scripts / Programs | Don't blame the Matlab compiler |
For human error. We should be careful to
only run the compiler outside the mDV directory |
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183
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Fri Dec 7 19:14:30 2007 |
tobin | Update | PSL | ISS dark noise - ground loop enlightenment | My alleged 60 Hz harmonics were all from a
ground loop created by connecting the SR785
ground to the ISS circuit ground; they disappeared |
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182
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Fri Dec 7 18:31:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Addendnum. The reason the linemon_mcr command
was in the path was because of the user issuing
the command "addpath(genpath(pwd))" where |
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181
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Fri Dec 7 18:28:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Andrey pointed out to me that some matlab
functions in the Signal Processing Toolbox
were dying with errors. Looking into the |
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180
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Fri Dec 7 14:14:48 2007 |
rob | Metaphysics | Computer Scripts / Programs | tdsread problems on Solaris |
[COLOR=darkblue]tdsread[/COLOR] has developed
a strange new illness, whereby it cannot |
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179
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Fri Dec 7 11:33:24 2007 |
waldman | Omnistructure | OMC | PZT wiring | The 2 pin LEMO connector has got an unmarked
pin and a pin marked by a white half-circle.
The unmarked pin is connected to the side |
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178
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Fri Dec 7 00:02:26 2007 |
rana | Summary | IOO | MC/FSS Frequency Noise | [U][B]The FSS frequency noise is not very
bad.[/B][/U]
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177
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Thu Dec 6 19:30:43 2007 |
tobin | Update | PSL | ISS dark noise - 60 Hz! | A higher resolution spectrum [attached] shows
that nearly all of the excess dark noise
on the ISS is in 60 Hz harmonics (with some |
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176
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Thu Dec 6 19:19:47 2007 |
Andrey | Configuration | SUS | Suspension damping Gain was restored |
Suspension damping gain was disabled for
some reason (all the indicators in the most |
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175
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Thu Dec 6 18:11:15 2007 |
rob | HowTo | Computer Scripts / Programs | Making DMF monitors |
I was able to use the matlab compiler to
compile a version of the [B]linetracker[/B] |
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174
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Thu Dec 6 15:22:42 2007 |
Andrey | Summary | Electronics | Pictures of the inside of He-Ne laser |
Steve gave me an old "dead" He-Ne laser that
long time ago was used for ETMX optical lever.
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173
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Thu Dec 6 15:21:59 2007 |
alberto | Frogs | Electronics | RF Transfer Function of Stiff Aluminum Wires | Transfer function of 3cm long Aluminum wires
and of 3cm stranded wires |
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172
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Wed Dec 5 23:19:03 2007 |
Andrey | Configuration | PEM | Accelerometers are turned on |
All accelerometers have been turned on, as
Alan asked during Wednesday meeting.
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7x |
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171
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Wed Dec 5 20:32:51 2007 |
tobin | Update | PSL | ISS dark noise | The ISS dark noise is not coming from the
PD heads; the spectrum is essentially unchanged
when the PD is unplugged from the ISS. Did |
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170
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Wed Dec 5 19:25:07 2007 |
rana | DAQ | CDS | DMF | I made a database file on C1AUX called dmf.db.
It has 9 DMF EPICS channels which are also
trended
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169
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Wed Dec 5 18:22:03 2007 |
tobin | Update | PSL | ISS dark noise | Attached is a plot of the dark noise spectrum
of the ISS photodiodes (1) before fooling
with them, (2) after replacing the 4151's |
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168
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Wed Dec 5 18:08:36 2007 |
Andrey | Update | ASC | Optical Lever laser for ETMX is installed |
A new laser with \lambda=633nm has been intalled
and the mirror adjusted so that the signal |
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167
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Wed Dec 5 17:49:57 2007 |
tobin | Update | PSL | ISS | Attached is a plot of the ISS RIN with a variety
of gain settings.
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166
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Wed Dec 5 16:57:36 2007 |
tobin | HowTo | Computer Scripts / Programs | SR785 data converter on linux | I was pleased to find that the SR785 Data
Viewer (including the command line conversion
utility) installs and works in linux using |
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165
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Wed Dec 5 13:49:08 2007 |
alberto | Update | Electronics | RF AM PD lines monitor | In the last weeks I’ve been working on the
design of an electronic board to measure
directly the power of the main spectral lines |
|
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164
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Wed Dec 5 10:57:08 2007 |
alberto | HowTo | Computers | Connecting the GPIBto USB interface to the Dell laptop | The interface works only on one of the USB
ports of the laptop (the one on the right,
looking at the computer from the back). |
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163
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Tue Dec 4 23:16:35 2007 |
tobin | Update | PSL | ISS | I was confused to find that I could increase
the ISS gain slider all the way from 15dB
to 30dB without seeing much of any increase |
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162
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Mon Dec 3 22:20:09 2007 |
tobin | Configuration | PSL | ISS | I replaced the painfully short 1' cables on
the ISS photodiodes with luxurious five foot
cables, made by chopping a ten foot Amphenol |
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161
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Mon Dec 3 19:44:58 2007 |
Accelerometers on new mounts | Configuration | PEM | Andrey |
I (Andrey) continued today working with new
accelerometer mounting. (see entry #151 about |
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160
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Mon Dec 3 19:06:49 2007 |
rana | DAQ | Computer Scripts / Programs | linemon | I turned up my nose at Matlab's special tools.
I modified the linetracker to use the
relationship [U][B]phase = 2*pi*f*t[/B][/U] |
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159
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Mon Dec 3 17:55:39 2007 |
tobin | HowTo | Computer Scripts / Programs | linemon | Matlab's Signal Processing toolbox has a [url=http://www.mathworks.com/access/helpdesk/help/toolbox/signal/index.html?/access/helpdesk/help/toolbox/signal/spectrum.html]set
of algorithms for identifying sinusoids in
data[/url]. Some of them (e.g., [url=http://www.mathworks.com/access/helpdesk/help/toolbox/signal/index.html?/access/helpdesk/help/toolbox/signal/rootmusic.html&http://www.mathworks.com/cgi-bin/texis/webinator/search/]rootmusic[/url]) |
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158
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Mon Dec 3 16:24:47 2007 |
tobin | HowTo | Computers | GNU screen | [url=http://jmcpherson.org/screen.html]GNU
screen[/url] is a utility that can be quite
handy for managing long-running psuedo-interactive |
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157
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Mon Dec 3 00:10:42 2007 |
rana | DAQ | Computer Scripts / Programs | linemon | I've started up one of our first Matlab based
DMT processes as a test.
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156
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Sun Dec 2 21:13:16 2007 |
rana | Configuration | IOO | MC SUS re-alignment | |
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155
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Sun Dec 2 21:07:39 2007 |
rana | Configuration | IOO | MC SUS re-alignment | [COLOR=darkblue][CODE]you asked for: diff
2007/12/01,4:58:48 2007/12/03,4:58:48 utc
'MC.*COMM'
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154
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Sun Dec 2 21:02:12 2007 |
rana | Configuration | IOO | MC SUS re-alignment | [COLOR=purple][SIZE=2][B][FONT=Comic Sans
MS]The spot on MC2 was not centered, so I
put it back in the center:[/FONT][/B][/SIZE][/COLOR]
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153
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Sun Dec 2 17:37:33 2007 |
rana | Omnistructure | Computers | Network Cabling in the Office | We all know that we've spent many integrated
man hours trying to figure out why our network
connections
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152
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Fri Nov 30 21:27:24 2007 |
rana | DAQ | PEM | weather / stacis / c1pem1 | I was trying to add some Seis BLRMS channels
to the c1pem1 processor so that we could
have DMT trends.
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151
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Fri Nov 30 20:17:26 2007 |
Andrey | Configuration | PEM | Accelerometers and alum.plates for them | All 6 accelerometers which were located near
the ITMX are turned off and disconnected
from the power cords.
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150
|
Fri Nov 30 20:13:57 2007 |
dmass | Summary | General | HeNe UniPhase Laser | Data for the Uniphase 1.9 mW HeNe laser (labeled:
"051507 From ISCT-BS") SN: 1284131 Model:
1103P
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149
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Fri Nov 30 19:46:58 2007 |
rana | Configuration | Computers | EPICS Time Bad again | The time on the EPICS screens is off by 10
minutes again. Por Que?
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148
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Fri Nov 30 19:29:14 2007 |
rana | Configuration | SUS | new screen | Andrey is working on a new screen to show
us the drift of the optics by alarming on
their osem values. [COLOR=darkred]You can |
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147
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Fri Nov 30 19:11:05 2007 |
rana | Configuration | Electronics | ETMX oplev dead again | I removed the ETMX HeNe and put in on a test
table and it fired up fine. In its
previous location the light on the HeNe power |
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146
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Fri Nov 30 13:46:50 2007 |
rob | Configuration | Electronics | ETMX oplev dead again | [quote]In the interests of getting the Xarm
alignment script working again, I reset the
local damping gains for the test masses to |
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145
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Fri Nov 30 11:44:57 2007 |
rob | Configuration | Electronics | ETMX oplev | In the interests of getting the Xarm alignment
script working again, I reset the local damping
gains for the test masses to their previous |
|
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144
|
Fri Nov 30 11:22:22 2007 |
ajw | Summary | CDS | GEO DV => LIGO DV | [quote][URL=http://www.aei.mpg.de/~hewitson/]Martin
Hewitson[/URL] of [B]GEO600[/B] fame has
modified the cool GEO DV
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143
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Thu Nov 29 19:35:14 2007 |
rana | HowTo | Computer Scripts / Programs | GPIB Scripts | [quote]I've spent a lot of time trying to
configurate the GPIB-USB interface for the
HP4195. After installing 1) the Agilent libraries, |
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142
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Thu Nov 29 18:10:13 2007 |
Alberto | HowTo | Computer Scripts / Programs | GPIB Scripts | I've spent a lot of time trying to configurate
the GPIB-USB interface for the HP4195. After
installing 1) the Agilent libraries, 2) the |
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141
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Thu Nov 29 15:17:53 2007 |
rob | Configuration | PSL | ISS |
I put some ISS beam on the diode on the PSL
table. In the previous layout, this was |
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