| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
5065
|
Sat Jul 30 02:47:43 2011 |
rana | Update | PSL | ABSL Laser crystal temp left largely excited & left unattended for more than 3hours | Hmm. Should have only been +/- 1
GHz. Some setting got changed apparently...
This is a part of the RefCav temperature |
|
|
4996
|
Wed Jul 20 06:52:01 2011 |
Suresh | Update | LSC | ABSL - PSL beat lock | The ABSL locking setup to the PSL is down.
According
the plan, I started to use the IR beam dumped
after the doubling crystal for the IR beat |
|
|
8581
|
Wed May 15 17:38:49 2013 |
Jamie | Summary | CDS | AA/AI requirements |
|
|
|
15709
|
Fri Dec 4 19:23:40 2020 |
Koji | Update | Electronics | AA/AI board testing ongoing | I have the setup built for the AA/AI board
testing around the PD testing area. Please
let me leave it like that for a week or so. |
|
|
422
|
Wed Apr 16 21:11:12 2008 |
rana | Summary | DAQ | AA/AI Filters for the DAQ & FE systems | I used Foton to make up some new filters which
will be used all over the project in order
to downsample/upsample.
|
|
|
3911
|
Fri Nov 12 20:40:51 2010 |
josephb, yuta, valera | Configuration | Electronics | AA voltage range | We changed the range of the two SUS AA
boards in the corner from +/-2 V to +/-10
V by changing the supply voltage from +/-5 |
|
|
5022
|
Sun Jul 24 20:36:03 2011 |
haixing | Summary | Electronics | AA filter tolerance analysis | Koji and Haixing,
We did a tolerance analysis to specify
the conner frequency for passive low-pass |
6x |
|
5023
|
Sun Jul 24 20:47:21 2011 |
rana | Summary | Electronics | AA filter tolerance analysis | This is sort of OK, except the capacitor
connects across the (+) terminals of the
two input opamps, and does not connect to |
|
|
5024
|
Sun Jul 24 22:19:19 2011 |
haixing | Summary | Electronics | AA filter tolerance analysis |
>> This sort of OK, except
the capacitor connects across the (+) terminals |
|
|
5038
|
Tue Jul 26 21:11:40 2011 |
haixing | Summary | Electronics | AA filter tolerance analysis | |
|
|
4748
|
Thu May 19 12:09:41 2011 |
josephb | Update | CDS | AA filter box pulled from 1X5, optic suspensions currently off | [Steve, Joe]
Steve pulled the top AA filter box
from 1X5 which handled some of the suspensions |
|
|
4750
|
Thu May 19 17:53:03 2011 |
steve | Update | CDS | AA filter box modified at 1X5 |
|
|
|
15744
|
Tue Dec 22 22:11:37 2020 |
gautam | Update | CDS | AA filt repaired and reinstalled | Koji fixed the problematic channel - the
issue was a bad solder joint on the input
resistors to the THS4131. The board was re-installed. |
|
|
5168
|
Wed Aug 10 12:28:22 2011 |
Ishwita , Manuel | Update | PEM | AA board gain | We used a function generator, an oscilloscope
and the Data Viewer to check the gain of
the new AA board (used for the seismometers). |
|
|
4959
|
Mon Jul 11 10:10:31 2011 |
Ishwita | Configuration | | AA board | The AA board shown in attachment 1 will
be used in the seismometer hardware setup.
A cartoon of this setup is shown in attachment |
|
|
4979
|
Sat Jul 16 18:54:05 2011 |
Ishwita, Manuel | Configuration | Electronics | AA board | We fixed the anti-aliasing board in its
aluminum black box, the box couldn't
be covered entirely because of the outgoing |
|
|
7543
|
Sun Oct 14 20:51:20 2012 |
Den | Update | PEM | AA board |
|
|
|
7546
|
Mon Oct 15 10:14:22 2012 |
Den | Update | PEM | AA board |
|
|
|
8555
|
Thu May 9 00:05:12 2013 |
rana, Koji, Jenne | Summary | LSC | AA and AI change | We would
like to increase the UGF of the PRC loop |
|
|
3806
|
Thu Oct 28 04:23:38 2010 |
rana | Update | IOO | A2L prep | To get the angle to length signal before
the c1ioo processor gets going, we need a
length signal. We can use either the error |
|
|
13996
|
Thu Jun 21 14:23:22 2018 |
Udit Khandelwal | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | Here’s a quick summary of the Tip-Tilt
Design updates (all files are in the dropbox
in [TipTiltSus>TT_New]) that I have been |
|
|
13997
|
Thu Jun 21 14:57:59 2018 |
Koji | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | > 2. Weighted screw rod at the
bottom for tilting the mirror-holder:
Too long. The design of the holder |
|
|
1409
|
Thu Mar 19 02:45:36 2009 |
Yoichi | Configuration | IOO | A loose wire found for MC1 | I found a loose connection of a wire in the
cross-connect between an ADC and the MC1
coil driver's UL bias input.
|
|
|
1410
|
Thu Mar 19 10:45:43 2009 |
Yoichi | Configuration | IOO | A loose wire found for MC1 | I attached a 6-hour trend of the MC mirror
OSEM signals with the MC unlocked.
The drift of the MC1 is within 20 counts |
|
|
15073
|
Wed Dec 4 19:54:27 2019 |
gautam | Update | LSC | A look to the past | Trawling
through some past elogs, I saw that the ALS
noise increase as a function of CARM offset |
|
|
59
|
Sat Nov 3 16:20:43 2007 |
waldman | Summary | OMC | A good day's work |
I followed up yesterday's test of the PZT
with a whole mess of characterizations of |
6x |
|
4376
|
Fri Mar 4 03:31:35 2011 |
kiwamu | Update | Green Locking | A first noise budget | I made a noise budget for the ALS noise
measurement that I did a week ago (see
#4352). |
|
|
15562
|
Mon Sep 7 23:49:14 2020 |
gautam | Update | BHD | A first look at RF44 scheme | Summary:
Over the last couple of days, I've
been working towards getting the infrastructure |
|
|
15563
|
Tue Sep 8 01:31:43 2020 |
Koji | Update | BHD | A first look at RF44 scheme | - Loose fiber coupler: Sorry about that.
I could not detect something was loose there,
although some of the locks were not tightened. |
|
|
6414
|
Wed Mar 14 13:16:50 2012 |
kiwamu | Update | LSC | A correction on Noise estimatino in the REFL33Q | A
correction on the previous elog about the
REFL33Q noise: |
|
|
1286
|
Mon Feb 9 17:09:51 2009 |
Yoichi | Update | Computers | A bunch of updates for the network GPIB stuff. | During the work on ISS, we noticed that netgpibdata.py
is very unreliable for SR785.
The problem was caused by flakiness of the |
|
|
15820
|
Thu Feb 18 20:24:48 2021 |
Koji | Summary | Electronics | A bunch of electronics received | Todd provided us a bunch of electronics.
I went to Downs to pick them up this afternoon
and checked the contents in the box. Basically, |
|
|
15828
|
Sat Feb 20 10:01:48 2021 |
gautam | Summary | Electronics | A bunch of electronics received | Will we also be receiving the additional
34 Satellite Amplifier PCBs? |
|
|
15830
|
Sat Feb 20 16:46:17 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We received currently available sets. We
are supposed to receive more coil drivers
and sat amps, etc. But they are not ready |
|
|
15866
|
Fri Mar 5 00:53:09 2021 |
Koji | Summary | Electronics | A bunch of electronics received | Received additional front/rear panels.
Updated the original entry and Wiki [Link]
|
|
|
15868
|
Fri Mar 5 15:03:28 2021 |
gautam | Summary | Electronics | A bunch of electronics received | The PCBs for the D1002593
BIO I/F (5pcs ea of D1001050
and D1001266) |
|
|
15870
|
Fri Mar 5 15:32:53 2021 |
Koji | Summary | Electronics | A bunch of electronics received | The parts will be ordered by Koji
The components for the additional BIO I/F
have been ordered. |
|
|
15981
|
Wed Mar 31 03:56:37 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We have received 9x 18bit DAC adapter boards
(D1000654) |
|
|
10038
|
Fri Jun 13 19:09:44 2014 |
Koji | Update | IOO | A blown fuse found on the euro card crate at 1X2 (IOO) rack. | [Rana Zach Koji]
We tracked down the MC locking issue
to be associated with the power supply problem. |
|
|
4486
|
Mon Apr 4 18:58:44 2011 |
Bryan | Configuration | Green Locking | A beam of purest green | We now have green light at the Y end.
The set-up (with careful instructions |
|
|
3942
|
Wed Nov 17 23:45:20 2010 |
Jenne | Update | SUS | A bad day for suspensions | [Jenne, Suresh]
Today has been a downright miserable
day in the world of suspension work. Thumbs |
|
|
2364
|
Tue Dec 8 09:18:07 2009 |
Jenne | Update | Computers | A *great* way to start the day.... | Opening of ETMY has been put on hold to
deal with the computer situation. Currently
all front end computers are down. The |
|
|
7587
|
Mon Oct 22 09:10:07 2012 |
Steve | Update | VAC | @750Torr |
|
|
|
1659
|
Sat Jun 6 01:44:53 2009 |
rob | Update | Locking | ? | Lock acquisition is proceeding smoothly
for the most part, but there is a very consistent
failure point near the end of the cm_step |
|
|
1660
|
Sun Jun 7 04:57:39 2009 |
Yoichi | Update | Locking | ? |
|
|
|
1663
|
Tue Jun 9 23:25:24 2009 |
rob | Update | Locking | ? |
|
|
|
11685
|
Tue Oct 13 05:48:39 2015 |
ericq | Update | LSC | :/ | [ericq, Gautam]
Despite our best efforts, the grappa
remains out of reach: the DRFPMI was not |
|
|
4237
|
Wed Feb 2 03:27:20 2011 |
Koji | Summary | Green Locking | 85MHz Freq divider | The freq divider was built and installed
in the beat detection path.
Attachment 1: Circuit diagram |
|
|
3803
|
Thu Oct 28 03:07:53 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : a health check | I
did a health check for a 80MHz VCO box. |
|
|
3820
|
Fri Oct 29 06:20:20 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : VCO calibration | I calibrated the VCO frequency
as a function of the applied input voltage.
|
|