| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4219
|
Fri Jan 28 11:08:44 2011 |
josephb | Update | Green Locking | no transmission of ALS signals | As you've
correctly noted, the source of the C1:GCV-SCX_ETMX_ALS
channels is in the c1gcv model. The first |
|
|
4218
|
Fri Jan 28 10:27:46 2011 |
Aidan, Joe | Summary | Green Locking | Digital Frequency Discriminator - calibration | One more thing ... we can calibrate
the output of the LP filter to give a result
in Hz with the following calibration: |
|
|
4217
|
Fri Jan 28 09:03:38 2011 |
Aidan | Summary | Green Locking | Digital Frequency Discriminator |
|
|
|
4216
|
Thu Jan 27 23:21:50 2011 |
rana | Summary | Green Locking | Digital Frequency Discriminator | That's some pretty fast work! I
thought we would be taking up to a week to
get that happening. I wonder what's the right |
|
|
4215
|
Thu Jan 27 21:43:37 2011 |
Koji | Update | Green Locking | no transmission of ALS signals | No signal is transmitted from C1:GCV-SCX_ETMX_ALS
(on c1gcv) to C1:GCV-SCX_ETMX_ALS (on c1scx)
I can't find RFM definition for ALS |
|
|
4214
|
Thu Jan 27 21:10:47 2011 |
Osamu | Update | 40m Upgrading | Calibrated noise of green | I calibrated noise spectrum of green lock.
1. Measurement of conversion factor
of ADC input from V to ct: |
|
|
4213
|
Thu Jan 27 17:12:02 2011 |
Aidan, Joe | Summary | Green Locking | Digital Frequency to Amplitude converter | Joe and I built a very simple digital frequency
to amplitude converter using the RCG. The
input from an ADC channel goes through a |
|
|
4212
|
Thu Jan 27 15:16:43 2011 |
josephb | Update | CDS | Updated generate_master_screens.py | I modified
the generate_master_screens.py script in
/opt/rtcds/caltech/c1/medm/master/ to handle |
|
|
4211
|
Thu Jan 27 11:04:27 2011 |
Koji | Update | Green Locking | beat freq scan | Experiment in the night of Jan 26.
o The arm was locked for the IR beam
and was aligned for it. |
|
|
4210
|
Thu Jan 27 03:24:56 2011 |
Kevin | Update | Electronics | POY Optical Transfer Function | [Rana and Kevin]
I measured the optical transfer function
of POY and fit the data using LISO. The fit |
|
|
4209
|
Wed Jan 26 14:49:48 2011 |
Aidan | Update | Environment | Turned on Control room AC | 80 degrees is too uncomfortable in the
control room so I turned on the AC. The set
point is 74F. |
|
|
4208
|
Wed Jan 26 12:04:31 2011 |
josephb | Update | CDS | Explanation of why c1sus and c1lsc models crash when the other one goes down | So apparently
with the current Dolphin drivers, when one
of the nodes goes down (say c1lsc), it causes |
|
|
4207
|
Wed Jan 26 12:03:45 2011 |
Koji | Update | CDS | Front End multiple crash | This is definitely a nice magic to know
as the rebooting causes too much hustles.
Also, you and I should spend an hour |
|
|
4206
|
Wed Jan 26 10:58:48 2011 |
josephb | Update | CDS | Front End multiple crash | Looking
at dmesg on c1lsc, it looks like the model
is starting, but then eventually times out |
|
|
4205
|
Wed Jan 26 10:11:47 2011 |
Aidan | Update | Green Locking | cavity scan |
|
|
|
4204
|
Wed Jan 26 02:18:12 2011 |
Koji | Update | SUS | ETMX length to angle matrix | I have put an offset of 1000 counts to
C1:SUS-ETMX_ALS_OFFSET. This actually misalign
the mirror a lot. |
|
|
4203
|
Tue Jan 25 22:49:13 2011 |
Koji | Update | CDS | Front End multiple crash | STATUS:
Rebooted c1lsc and
c1sus. Restarted fb many times.
|
|
|
4202
|
Tue Jan 25 21:57:59 2011 |
Koji | Update | Green Locking | Slow servo for green laser | 1. The dewhitening filter CH6 had no output.
I disconnected the cable and put it to the
monitor out of the AI filter. |
|
|
4201
|
Tue Jan 25 20:42:46 2011 |
Osamu | Update | Green Locking | Slow servo for green laser | I implemented a slow servo for green laser
thermal control on c1scx.mdl. Ch6,7 of ADC
and ch6 of DAC are assigned for this servo |
|
|
4200
|
Tue Jan 25 15:20:38 2011 |
josephb | Update | CDS | Updated c1rfm model plus new naming convention for RFM/Dolphin | After
sitting down for 5 minutes and thinking about
it, I realized the names I had been using |
|
|
4199
|
Tue Jan 25 06:48:55 2011 |
kiwamu | Update | Green Locking | To do list | Here are some
tasks that I want someone to work on during |
|
|
4198
|
Tue Jan 25 05:26:51 2011 |
kiwamu | Update | Green Locking | cavity scan | |
|
|
4197
|
Tue Jan 25 00:09:54 2011 |
Koji | Update | General | Jenne laser is at PSL Lab | I found Tara's elog entry that Jenne laser
is at PSL Lab.
Since we recently use it frequently, |
|
|
4196
|
Mon Jan 24 14:27:13 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
4195
|
Mon Jan 24 13:08:07 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
4194
|
Mon Jan 24 10:39:16 2011 |
josephb | HowTo | DAQ | DAQ Wiki Failure | Actually
both port 8087 and 8088 work to talk to the
frame builder. Don't let the lack of |
|
|
4193
|
Mon Jan 24 10:19:21 2011 |
Koji | Update | Green Locking | X arm locked ! | Well... The ALS loop is engaged and the
error was suppressed.
So, how is the IR error signal stabilized |
|
|
4192
|
Mon Jan 24 09:33:08 2011 |
rana | Update | Green Locking | X arm locked ! | Very cool.
But the PLL seems very fishy to me.
The ZP-3MH needs 13 dBm to operate correctly. |
|
|
4191
|
Mon Jan 24 02:58:46 2011 |
kiwamu | Update | Green Locking | X arm locked ! | I succeeded in |
|
|
4190
|
Sat Jan 22 02:23:26 2011 |
Koji | Update | Green Locking | some more progress | What is the point to use the error instead
of the feedback? It does not make sense to
me. |
|
|
4189
|
Sat Jan 22 02:11:09 2011 |
kiwamu | Update | Green Locking | some more progress | [Rana, Suresh, Kiwanu]
|
|
|
4188
|
Sat Jan 22 02:03:55 2011 |
Koji | Update | Green Locking | Examining the stability of VCO PLL at low frequencies | Damn.
If this figure is true, we were looking at
wrong signal. We should look at the feedback |
|
|
4187
|
Sat Jan 22 01:56:04 2011 |
Suresh | Update | Green Locking | Examining the stability of VCO PLL at low frequencies | [Kiwamu,
Suresh, Rana]
Our |
|
|
4186
|
Fri Jan 21 23:55:25 2011 |
rana | Configuration | LSC | Phase Noise Measurement filter | We've set up a beat note measurement between
the VCO driver and the Marconi (see Suresh's
elog). |
|
|
4185
|
Fri Jan 21 23:17:54 2011 |
rana | HowTo | DAQ | DAQ Wiki Failure | The DAQ Wiki pages say to use port 8088
for restarting the Frame Builder. I tried
this to no avail. |
|
|
4184
|
Fri Jan 21 17:59:27 2011 |
josephb, alex | Update | CDS | Fixed Dolphin transmission | The orientation
of the Dolphin cards seems to be opposite
on c1lsc and c1sus. The wide part is |
|
|
4183
|
Fri Jan 21 15:26:15 2011 |
josephb | Update | CDS | c1sus broken yesterday and now fixed | [Joe,
Koji]
Yesterday's CDS swap of c1sus and |
|
|
4182
|
Fri Jan 21 11:45:01 2011 |
Aidan | Configuration | Locking | Ballpark figures for Green Locking PLLs (Digital vs Analogue) |
|
|
|
4181
|
Fri Jan 21 02:45:43 2011 |
kiwamu | Update | Green Locking | interface for PLL to ADC | [Suresh, Kiwamu]
|
|
|
4180
|
Thu Jan 20 22:17:12 2011 |
rana | Summary | LSC | FPMI Displacement Noise | I found this old plot in an old elog entry
of Osamu's (original
link). |
|
|
4179
|
Thu Jan 20 18:20:55 2011 |
josephb | Update | CDS | c1iscex computer and c1sus computer swapped | Since
the 1U sized computers don't have enough
slots to hold the host interface board, RFM |
|
|
4178
|
Thu Jan 20 17:00:39 2011 |
Aidan | Configuration | Locking | Ballpark figures for Green Locking PLLs (Digital vs Analogue) | If we use a digital PLL for locking the
frequency of the PSL and END green lasers
then we can expect a UGF of around 1kHz (assuming |
|
|
4177
|
Thu Jan 20 15:39:59 2011 |
Aidan | Update | Locking | Upper limit on frequency noise of ADC | [Aidan, Kiwamu]
Kiwamu and I plugged the output from
a DS3456 function generator into the ADC |
|
|
4176
|
Thu Jan 20 15:15:39 2011 |
kiwamu | Update | Green Locking | status update: PLL connected to ADC | I
realized that the black AA board I mentioned |
|
|
4175
|
Thu Jan 20 10:15:50 2011 |
josephb | Update | CDS | c1scy error | This is
caused by an insufficient number of active
DAQ channels in the C1SCY.ini file located |
|
|
4174
|
Thu Jan 20 04:43:28 2011 |
kiwamu | Update | Green Locking | status update: PLL connected to ADC | I
connected the PLL signal to the ADC on c1ioo. |
|
|
4173
|
Thu Jan 20 04:03:02 2011 |
kiwamu | Update | CDS | c1scy error | I found
that c1scy was not running due to a daq initialization |
|
|
4172
|
Thu Jan 20 01:50:30 2011 |
Kevin | Update | Electronics | POX Transfer Functions | [Koji, Kevin]
We fit the entire POX optical transfer
function from 1 MHz to 500 MHz in LISO. The |
|
|
4171
|
Thu Jan 20 00:39:22 2011 |
kiwamu | HowTo | CDS | DAQ setup : another trick | Here
is another trick for the DAQ setup when you
add a DAQ channel associated with a new front |
|
|
4170
|
Wed Jan 19 17:00:23 2011 |
Kevin | Update | Electronics | POX Transfer Functions | The value of I_dc was a mistake.
The value should be 240 µA.
The widths of the resonance peaks |
|