| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8598
|
Fri May 17 18:58:58 2013 |
Jamie, Koji | Summary | CDS | Weird DAC bit flipping at half integer output values | While looking at the DAC anti-imaging filters,
Koji noticed an odd feature of the DAC output:
|
|
|
8599
|
Fri May 17 19:56:52 2013 |
Koji | Summary | CDS | Weird DAC bit flipping at half integer output values | Let me make a complimentary comment on
this effect.
Because of this oscillation feature, |
|
|
8613
|
Wed May 22 11:09:33 2013 |
Jamie | Summary | CDS | Weird DAC bit flipping at half integer output values | After querying CDS folks about this issue,
I got some responses that indicated the problems
was likely limit-cycle oscillations due to |
|
|
8614
|
Wed May 22 11:21:28 2013 |
Koji | Summary | CDS | Weird DAC bit flipping at half integer output values | Is this limit cycle caused by the residual
of the digital AI filtering at the half sampling
freq and that his the threshold? |
|
|
8615
|
Wed May 22 11:35:06 2013 |
Jamie | Summary | CDS | Weird DAC bit flipping at half integer output values |
|
|
|
8616
|
Wed May 22 15:08:37 2013 |
Koji | Summary | CDS | Weird DAC bit flipping at half integer output values | It seems that the effect is from the (linear)
residual fluctuation of the digital AI filter
for the zero-padded signal. |
|
|
11682
|
Fri Oct 9 16:43:50 2015 |
ericq | Update | IOO | Weird IMC behavior | A few minutes ago, Gautam and I were poking
around the IOO rack, looking at where he
should power his frequency divider box, and |
|
|
16113
|
Mon May 3 18:59:58 2021 |
Anchal | Summary | General | Weird gas leakagr kind of noise in 40m control room | For past few days, a weird sound of decaying
gas leakage comes in the 40m control room
from the south west corner of ceiling. Attached |
|
|
16115
|
Mon May 3 23:28:56 2021 |
Koji | Summary | General | Weird gas leakagr kind of noise in 40m control room | I also noticed some sound in the control
room. (didn't open the MP3 yet)
I'm afraid that the hard disk |
|
|
13207
|
Mon Aug 14 20:12:09 2017 |
Jamie, Gautum | Update | CDS | Weird problem with GPS receiver | Today we saw a weird issue with the GPS
receiver (EndRun Technologies Tempus LX).
GPS timing on fb1 (which is handled via IRIG-B |
|
|
10945
|
Tue Jan 27 17:58:21 2015 |
Jenne | Configuration | Treasure | Welcome, Donatella! | Welcome to your new abode, Donatella! |
|
|
5585
|
Fri Sep 30 15:22:17 2011 |
Katrin | Update | Green Locking | What happened on green YARM? |
This is a kind |
|
|
15080
|
Fri Dec 6 00:02:48 2019 |
gautam | Update | LSC | What is the correct way to set the 3f offsets? | Summary:
I made it to 0 CARM offset, PRMI
locked a bunch of times today. However, I |
|
|
15419
|
Fri Jun 19 17:06:50 2020 |
gautam | Update | LSC | What should the short-term commissioning goals be? | Summary:
|
|
|
15427
|
Wed Jun 24 17:20:16 2020 |
gautam | Update | LSC | What should the short-term commissioning goals be? | Per the discussion at the meeting today,
the plan of action is:
Lock the PRMI on carrier |
|
|
16017
|
Mon Apr 12 10:07:35 2021 |
Anchal | Update | SUS | What's F2A?? | I'm not sure I understand what F2A
is? I couldn't find a description of
this filter anywhere and don't remember |
|
|
16020
|
Tue Apr 13 09:51:22 2021 |
rana | Update | SUS | What's F2A?? | Force to Angle. It just means the filters
that are in the POS OUTPUT matrix. I think
in the past sometimes they are called F2P |
|
|
11851
|
Sat Dec 5 12:02:25 2015 |
yutaro | HowTo | Cameras | When image capture does not work... | Today image capture did not work again,
though it had worked 3 days before. I also
found that red indicator light on the |
|
|
11852
|
Sat Dec 5 21:28:33 2015 |
Koji | HowTo | Cameras | When image capture does not work... | Do we need "make" everytime?
Do you mean just running "modprobe"
didn't work? |
|
|
11853
|
Sat Dec 5 21:57:32 2015 |
yutaro | HowTo | Cameras | When image capture does not work... | I don't know if just running "modprobe"
will work or not, because I didn't try
it... When the same problem happens |
|
|
2786
|
Sun Apr 11 13:51:04 2010 |
Alberto | Omnistructure | Computers | Where are the laptops? | I can't find the DELL laptop anywhere in
the lab. Does anyone know where it is?
Also one of the two netbooks is missing. |
|
|
2787
|
Sun Apr 11 19:05:34 2010 |
Koji | Omnistructure | Computers | Where are the laptops? | One dell is in the clean room for the suspension
work.
|
|
|
5714
|
Thu Oct 20 18:01:17 2011 |
Jenne | Update | Computer Scripts / Programs | Where should the "Update Snapshots" of screens live? | While trying to implement the regular yellow
shell script button in MEDM for my new OAF
screen, I noticed that the update snapshot |
|
|
5715
|
Thu Oct 20 18:42:47 2011 |
Koji | Update | Computer Scripts / Programs | Where should the "Update Snapshots" of screens live? | The following directory exists. We can
apply this convention to all of the models.
|
|
|
2305
|
Fri Nov 20 11:01:58 2009 |
josephb, alex | Configuration | Computers | Where to find RFM offsets | Alex checked out the old rts (which he
is no longer sure how to compile) from CVS
to megatron, to the directory: |
|
|
10595
|
Fri Oct 10 03:25:11 2014 |
Jenne | Update | LSC | Which side of optical spring are we on (simulation) | I have a simulated version of the differences
that we expect to see between the 2 different
sides of the CARM resonance. The point |
10x |
|
10594
|
Fri Oct 10 03:05:09 2014 |
ericq | Update | LSC | Which side of optical spring are we on? | I made some measurements to try and
see if any difference could be seen with
different CARM offset signs. |
|
|
10598
|
Mon Oct 13 12:01:28 2014 |
ericq | Update | LSC | Which side of optical spring are we on? | I went back into the DQ channels
to look at the TF from AO injection to REFLDC
(which is easy to do with this kind of noise |
|
|
10607
|
Wed Oct 15 02:58:03 2014 |
Jenne | Update | LSC | Which side of optical spring are we on? | Some measurements. Unclear meaning.
We tried both positive and negative |
|
|
10603
|
Mon Oct 13 21:20:56 2014 |
Jenne | Update | LSC | Which side of optical spring are we on? (No progress) | [Jenne, Diego]
In order to distinguish between the
spring and antispring sides of the CARM resonance, |
|
|
10604
|
Mon Oct 13 21:59:47 2014 |
rana | Update | Computer Scripts / Programs | Which side of optical spring are we on? (No progress) |
Since no one was here, I started
the Ubuntu 10 - 12 upgrade on Rossa. It didn't |
|
|
10612
|
Wed Oct 15 19:56:38 2014 |
Jenne | Update | LSC | Which side of optical spring are we on? Meas vs Model | I have plotted measured data from
last night (elog
10607) with a version of the result from |
|
|
14759
|
Mon Jul 15 03:30:47 2019 |
Kruthi | Update | Calibration-Repair | White paper as a Lambertian scatterer | I made some rough measurements, using the
setup I had used for CCD calibration, to
get an idea of how good of a Lambertian scatterer |
|
|
15531
|
Mon Aug 17 23:36:10 2020 |
gautam | Update | ALS | Whitening and ALS noise | I finally managed to
install a differential-receiving whitening
board in 1Y2 - 4 channels are available at |
|
|
15533
|
Tue Aug 18 13:55:23 2020 |
rana | Update | ALS | Whitening and ALS noise | No, there should be no unscheduled visits
from any inspector, marshal, tech, or vendor.
They all have to be escorted or they don't |
|
|
15532
|
Mon Aug 17 23:41:50 2020 |
gautam | Update | BHD | Whitening and air BHD dark noise | Summary:
With the chosen transimpedance
of 300 ohms, in order to be able to see the |
|
|
13563
|
Sat Jan 20 01:20:37 2018 |
gautam | Update | Electronics | Whitening filter D990694 | We use D990694
in various places. Today, Rana alerted me
to an important consideration to be kept |
|
|
13564
|
Sat Jan 20 15:57:11 2018 |
rana | Update | Electronics | Whitening filter D990694 | this
is the note from Hartmut Grote on this
topic from 2004 |
|
|
13568
|
Tue Jan 23 01:33:23 2018 |
gautam | Update | Electronics | Whitening filter D990694 | After discussing with Koji, we looked at
the aLIGO
incarnation of this board. Interestingly, |
|
|
13572
|
Wed Jan 24 00:48:47 2018 |
gautam | Update | Electronics | Whitening filter D990694 | I plan to do some characterization of this
problem. The plan is to use THD
as a metric for whether we are having hidden |
|
|
3790
|
Tue Oct 26 22:57:37 2010 |
Jenne | Configuration | Computers | Why doesn't DTT work?!? | DTT has only SUS and "X02" channels
under C1 in the drop down channel selection
menu. Basically, we can't measure any |
|
|
3793
|
Wed Oct 27 10:53:03 2010 |
josephb | Configuration | Computers | Why doesn't DTT work?!? | Test points for the SUS channels should
be there. They have been working previously
this week. Possibly break down points |
|
|
4027
|
Wed Dec 8 14:46:19 2010 |
josephb, kiwamu | Update | CDS | Why the ETMX daq channels were not recorded last night | When adding
the ETMX DAQ channels using the daqconfig
gui (located in /opt/rtcds/caltech/c1/scripts/) |
|
|
14829
|
Mon Aug 5 17:23:26 2019 |
gautam | Summary | Computers | WiFi Settings on asia | The VEA laptop asia was configured to be
able to connect to too many WiFi networks
- it was getting conflicted in its default |
|
|
13905
|
Thu May 31 19:51:06 2018 |
Koji | Update | General | WiFi router firmware update / rebooting | The model of our martian wifi router (NETGEAR
R6400) was found in the FBI router list to
be rebooted asociated with the malware "VPNFilter" |
|
|
2664
|
Tue Mar 9 09:32:31 2010 |
Koji | Summary | General | Wideband measurement of Fast PZT response | I have measured a wideband response
of the fast PZT in the LWE NPRO 700mW in
the Alberto's setup. |
|
|
1105
|
Sun Nov 2 20:44:58 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | I took one 2 hour stretch of data to calculate
a MISO Wiener filter to subtract the Ranger
seismometer
|
|
|
1111
|
Mon Nov 3 22:35:40 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | [FONT=Comic Sans MS]To speed up the Wiener
filter work I defined a 256 Hz version of
the original 16kHz IOO-MC_L signal. The
|
|
|
1112
|
Tue Nov 4 00:47:53 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | Same as before, but now with a working Ranger
seismometer.
|
|
|
5102
|
Wed Aug 3 02:28:08 2011 |
Manuel, Ishwita | Update | WienerFiltering | Wiener Filtering in X-arm | Wiener Filtering was applied on the data
collected from the X-arm during the time:
GPS |
|