ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
4644
|
Thu May 5 15:33:37 2011 |
steve | Configuration | RF System | LSC rack | New right angle PVC front panel with SMA
bulkhead connectors are in place. The connections
are still lose. It is ready for Suresh to |
 |
4650
|
Fri May 6 06:36:18 2011 |
Suresh | Update | RF System | PD DC signals at each port connected | We now
have the DC signal from three PDs available
in the ADC channels 14,15 and 16. The |
|
4657
|
Sat May 7 10:59:11 2011 |
Suresh | Update | RF System | RF Source filters changed |
The
SLP-50 filters which were on the 55 MHz lines |
 |
4670
|
Mon May 9 17:23:25 2011 |
Suresh | Update | RF System | RF Cables near LSC Rack | [Steve, Suresh]
We started to clean up the RF cables
(heliax and PD interface cables) at |
|
4675
|
Tue May 10 01:39:41 2011 |
Suresh | Update | RF System | RF source troubles | Today after Steve and I finished the RF
cabling work for the day, Kiwamu noticed
that there were no RF signals to be seen. |
|
4698
|
Thu May 12 02:31:07 2011 |
Suresh | Update | RF System | installation of RF splitters in Demod boards | [Jamie, Koji, Suresh]
We replaced splitters in several
demod boards as per the table given below: |
|
4702
|
Thu May 12 10:27:02 2011 |
rana | Update | RF System | installation of RF splitters in Demod boards |
|
|
4703
|
Thu May 12 16:50:22 2011 |
Suresh | Update | RF System | installation of RF splitters in Demod boards | We have no plan to change the AS11 PD.
I was referring to the AS11 Demod board
which currently has the "Demodulator |
|
4708
|
Thu May 12 23:50:10 2011 |
Suresh | Update | RF System | POY55_Demod board Hardware change completed | The Demod board with S. No. 022 (being
used earlier as REFL11) has been modified.
It now has SCLF-65 as its input LP filter |
|
4711
|
Fri May 13 01:51:56 2011 |
Suresh | Update | RF System | RF Status update | I have posted the attached RF status update
and 1Y2 rack layout to the svn. |
 |
4714
|
Fri May 13 22:45:37 2011 |
Suresh | Update | RF System | The full set of 8 Demod boards is ready for testing | We have Completed the hardware changes
to the full set of 8 demod boards.
The last one completed today is AS11. |
|
4715
|
Fri May 13 23:04:58 2011 |
Suresh | Update | RF System | DC power supply on RF distribution box has been replaced. | [Steve, Koji, Suresh]
We shifted two Sorensen
power supplies from the Auxiliary rack next |
|
4716
|
Sat May 14 14:12:16 2011 |
Koji | Update | RF System | DC power supply on RF distribution box has been replaced. | Key
points of the power supply installation
We |
|
4736
|
Wed May 18 07:13:00 2011 |
Suresh | Update | RF System | Demod board measurements | I measured the amplitude and phase imbalances
of the demod boards which have been modified.
This is just a basic health check. |
 |
4737
|
Wed May 18 07:18:15 2011 |
Suresh | Update | RF System | POY55_Demod board Hardware change completed | The ~350 Hz noted in the elog below was
traced to an RF modulation of the 11 MHz
sideband. This modulation was set up |
|
4738
|
Wed May 18 15:54:50 2011 |
Koji | Update | RF System | DC power supplies for the RF generation box in place | [Koji, Steve]
DC power supplies for the RF generation
box are now in place. They are the top two |
|
4739
|
Wed May 18 16:52:23 2011 |
Suresh | Update | RF System | Cables for AS11 PD are in place | [Larisa, Suresh]
All the cables needed for the AS11
PD are in place... the heliax cable runs |
|
4740
|
Wed May 18 17:06:39 2011 |
Suresh | Update | RF System | DC power supplies for the RF generation box in place |
I have checked the voltages on the
connector. They are okay and I have |
|
4751
|
Thu May 19 19:41:17 2011 |
Suresh | Update | RF System | DAQ channel Assignments for RF PDs | [Kiwamu, Suresh]
In trying to keep the wiring of the
LSC rack as neat as possible, we came up |
|
4755
|
Fri May 20 05:41:22 2011 |
Suresh | Update | RF System | Demod board measurements | The POP110 board which had the large Amplitude
and Phase unbalances was examined today.
It turned out that there was some stray solder |
|
4804
|
Fri Jun 10 12:04:57 2011 |
Jenne | Update | RF System | Bad RF connections!! | I am in the process of calibrating AS55's
shot noise, and I noticed that the AS55 PD
input to the demod board was only finger-tight. |
|
4957
|
Fri Jul 8 19:50:19 2011 |
Suresh | Update | RF System | LSC rack channel assignment | [Jamie, Suresh]
We looked at the ADC
channel assignments in the LSC model and |
|
5249
|
Tue Aug 16 16:59:20 2011 |
Anamaria | Update | RF System | AM in the PM | Kiwamu, Keiko, Anamaria
Looking at the I and Q signals coming
from REFL11 and REFL55 we saw large offsets, |
|
5251
|
Wed Aug 17 02:48:56 2011 |
kiwamu | Update | RF System | Re: AM in the PM | [Keiko / Suresh / Anamaria / Kiwamu]
The AM |
|
5278
|
Mon Aug 22 20:37:43 2011 |
Anamaria | Configuration | RF System | Plan for install of 3f PDs | I made a quick sketch of how to include
two more RF PDs on the REFL beam, given the
space we have on the table. We want to install |
|
5921
|
Thu Nov 17 11:04:02 2011 |
Jenne | Update | RF System | Stochmon? | Is there an update on Stochmon? Are
the signals acquired somewhere already?
What's the current deal-io? The new |
|
5923
|
Thu Nov 17 11:35:27 2011 |
Koji | Update | RF System | Stochmon? | The Stochmon channels for 11&55MHz
have been reasonably working since last night.
The output is not yet calibrated |
|
5926
|
Thu Nov 17 14:38:16 2011 |
Zach | Update | RF System | Stochmon? | It turns out that we don't have all the
parts I would need to do a full prototype |
|
5951
|
Fri Nov 18 19:07:07 2011 |
Jenne | Update | RF System | Foam house on EOM | [Jenne, Zach, Frank]
Frank helped Zach and I cable up
at PT-100 RTD, and make sure it worked with |
|
5954
|
Sat Nov 19 00:09:02 2011 |
Zach | Update | RF System | Foam house on EOM |
|
|
5955
|
Sat Nov 19 00:34:36 2011 |
Zach | Update | RF System | why the Newport 6000 isn't working | I just figured out why the Newport
6000 isn't stabilizing the temperature. It is designed |
|
5976
|
Tue Nov 22 06:12:43 2011 |
Zach | Update | RF System | Prototype temperature controller | Tonight I built a simpler version of |
   |
5984
|
Wed Nov 23 00:30:14 2011 |
Zach | Update | RF System | EOM temperature controller trials | [Jenne, Zach]
We did some testing of the prototype
temperature controller. When I left it late |
|
6022
|
Mon Nov 28 14:27:35 2011 |
Jenne | Update | RF System | EOM temp driver | Here is 5 days of trend of the EOM temp
sensor and the heater driver monitor.
Unfortunately, it looks like we're regularly |
|
6023
|
Mon Nov 28 14:40:43 2011 |
Koji | Update | RF System | EOM temp driver |
|
|
6025
|
Mon Nov 28 15:43:36 2011 |
steve | Update | RF System | EOM temp zoomed |
|
|
6032
|
Tue Nov 29 02:09:15 2011 |
Zach | Update | RF System | EOM temp stabilization fixed | I inspected the temperature stabilization
circuit today to see why it wasn't working.
It didn't make sense that it just kept railing |
|
6035
|
Tue Nov 29 14:22:03 2011 |
Zach | Update | RF System | EOM temp stabilization performance | I left the EOM stabilization running overnight,
so we can finally see how the EOM temperature
stabilization does over long periods of time. |
  |
6036
|
Tue Nov 29 15:25:29 2011 |
steve | Update | RF System | EOM temp stabilization performance | It is not obvious what is working.
|
|
6040
|
Tue Nov 29 18:17:27 2011 |
Zach | Update | RF System | EOM temp stabilization performance |
|
|
6043
|
Tue Nov 29 19:08:53 2011 |
Zach | Update | RF System | EOM heater disconnected | I disconnected the heater at ~2:20
UTC, leaving the sensor circuit
operational. Don't be fooled by the apparent |
|
6044
|
Tue Nov 29 22:10:18 2011 |
kiwamu | Update | RF System | RFAM fluctuation reduced |
|
|
6047
|
Tue Nov 29 23:03:34 2011 |
Zach | Update | RF System | RFAM fluctuation reduced | I was hesitant to claim that this is definitely
true without the control data we were taking |
|
6050
|
Wed Nov 30 03:01:55 2011 |
kiwamu | Update | RF System | RFAM fluctuation reduced | Okay I have turned ON the temperature control
at 2:40 AM and will leave it ON for a while.
|
|
6053
|
Wed Nov 30 13:52:09 2011 |
Zach | Update | RF System | EOM temp stabilization ineffectual | This recent off/on run proved what I was
afraid of: the temperature stabilization
setup appears to do nothing except very near |
  |
6054
|
Wed Nov 30 14:12:53 2011 |
Jenne | Update | RF System | New EOM mount almost ready | The new EOM adapter plate and riser just
got back from the shop. I just had
Mike do the milling, and I'll drill and tap |
|
6055
|
Wed Nov 30 22:09:20 2011 |
Zach | Update | RF System | some final EOM stabilization efforts | First, things that were done:
I was troubled by the
odd-looking noise in the EOM temperature |
 |
6056
|
Thu Dec 1 01:24:56 2011 |
Jenne | Update | RF System | EOM temp stabilization at PSL lab | [Frank, Jenne]
Activities in a far, far away land
called PSL lab... |
|
6059
|
Thu Dec 1 12:27:51 2011 |
Zach | Metaphysics | RF System | RAM diagnosis/suppression plan? | It seems like there is some confusion---or
disagreement---amongst the lab about how |
|
6069
|
Mon Dec 5 09:46:21 2011 |
Zach | Metaphysics | RF System | RAM diagnosis/suppression plan? | Since no
one has made any comments |
|