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ID Date Author Type Category Subject Text Attachments
  4219   Fri Jan 28 11:08:44 2011 josephbUpdateGreen Lockingno transmission of ALS signalsAs 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, JoeSummaryGreen LockingDigital 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 AidanSummaryGreen LockingDigital Frequency Discriminator

    

       
            
  
  4216   Thu Jan 27 23:21:50 2011 ranaSummaryGreen LockingDigital Frequency DiscriminatorThat'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 KojiUpdateGreen Lockingno transmission of ALS signalsNo 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 OsamuUpdate40m UpgradingCalibrated noise of greenI calibrated noise spectrum of green lock.
1. Measurement of conversion factor
of ADC input from V to ct:
 20110127_Calibrated_grrennoise.pdf20110127_Calibrated_grrennoise.jpg20110127_TF_ETMXSUSEXC_to_PZTOUT.pdf 
  4213   Thu Jan 27 17:12:02 2011 Aidan, JoeSummaryGreen LockingDigital Frequency to Amplitude converterJoe and I built a very simple digital frequency
to amplitude converter using the RCG. The
input from an ADC channel goes through a
 Screenshot.pngSwept_sine_F_to_A.png 
  4212   Thu Jan 27 15:16:43 2011 josephbUpdateCDSUpdated generate_master_screens.pyI modified
the generate_master_screens.py script in
/opt/rtcds/caltech/c1/medm/master/ to handle
  
  4211   Thu Jan 27 11:04:27 2011 KojiUpdateGreen Lockingbeat freq scanExperiment in the night of Jan 26.
o The arm was locked for the IR beam
and was aligned for it.
 arm_scan.pdfarm_cav_scan3.png110126_ALS_inloop.pdf 
  4210   Thu Jan 27 03:24:56 2011 KevinUpdateElectronicsPOY Optical Transfer Function[Rana and Kevin]
I measured the optical transfer function
of POY and fit the data using LISO. The fit
 tf_pox_poy.pnglinearity.png 
  4209   Wed Jan 26 14:49:48 2011 AidanUpdateEnvironmentTurned on Control room AC80 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 josephbUpdateCDSExplanation of why c1sus and c1lsc models crash when the other one goes downSo 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 KojiUpdateCDSFront End multiple crashThis 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 josephbUpdateCDSFront End multiple crashLooking
at dmesg on c1lsc, it looks like the model
is starting, but then eventually times out
  
  4205   Wed Jan 26 10:11:47 2011 AidanUpdateGreen Lockingcavity scan

    

       
            
  
  4204   Wed Jan 26 02:18:12 2011 KojiUpdateSUSETMX length to angle matrixI 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 KojiUpdateCDSFront End multiple crashSTATUS: 

    Rebooted c1lsc and
c1sus. Restarted fb many times.
  
  4202   Tue Jan 25 21:57:59 2011 KojiUpdateGreen LockingSlow servo for green laser1. The dewhitening filter CH6 had no output.
I disconnected the cable and put it to the
monitor out of the AI filter.
 110125_Xend_thermal.pdf 
  4201   Tue Jan 25 20:42:46 2011 OsamuUpdateGreen LockingSlow servo for green laserI 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 josephbUpdateCDSUpdated c1rfm model plus new naming convention for RFM/DolphinAfter
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 kiwamuUpdateGreen LockingTo do listHere are some
tasks that I want someone to work on during
  
  4198   Tue Jan 25 05:26:51 2011 kiwamuUpdateGreen Lockingcavity scan   cavity_scan.png 
  4197   Tue Jan 25 00:09:54 2011 KojiUpdateGeneralJenne laser is at PSL LabI 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 kiwamuUpdateGreen LockingRe: X arm locked !


   
        
            
 masslock_oltf.png 
  4195   Mon Jan 24 13:08:07 2011 kiwamuUpdateGreen LockingRe: X arm locked !


   
        
            
 e_pll_oltf.png 
  4194   Mon Jan 24 10:39:16 2011 josephbHowToDAQDAQ Wiki FailureActually
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 KojiUpdateGreen LockingX 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 ranaUpdateGreen LockingX 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 kiwamuUpdateGreen LockingX arm locked !I succeeded in  time_series.pnggreen_one_arm.png 
  4190   Sat Jan 22 02:23:26 2011 KojiUpdateGreen Lockingsome more progressWhat 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 kiwamuUpdateGreen Lockingsome more progress[Rana, Suresh, Kiwanu]

  
  4188   Sat Jan 22 02:03:55 2011 KojiUpdateGreen LockingExamining the stability of VCO PLL at low frequenciesDamn.
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 SureshUpdateGreen LockingExamining the stability of VCO PLL at low frequencies[Kiwamu,
Suresh, Rana]
Our
 VCO_PLL_stability.pngVCO_PLL_stability.png 
  4186   Fri Jan 21 23:55:25 2011 ranaConfigurationLSCPhase Noise Measurement filterWe've set up a beat note measurement between
the VCO driver and the Marconi (see Suresh's
elog).
 a.gif 
  4185   Fri Jan 21 23:17:54 2011 ranaHowToDAQDAQ Wiki FailureThe 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, alexUpdateCDSFixed Dolphin transmissionThe 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 josephbUpdateCDSc1sus broken yesterday and now fixed[Joe,
Koji]
Yesterday's CDS swap of c1sus and
  
  4182   Fri Jan 21 11:45:01 2011 AidanConfigurationLockingBallpark figures for Green Locking PLLs (Digital vs Analogue)

    

       
            
  
  4181   Fri Jan 21 02:45:43 2011 kiwamuUpdateGreen Lockinginterface for PLL to ADC  [Suresh, Kiwamu]
  
  
  4180   Thu Jan 20 22:17:12 2011 ranaSummaryLSCFPMI Displacement NoiseI found this old plot in an old elog entry
of Osamu's (original
link).
 osamu-1140657006.pdf 
  4179   Thu Jan 20 18:20:55 2011 josephbUpdateCDSc1iscex computer and c1sus computer swappedSince
the 1U sized computers don't have enough
slots to hold the host interface board, RFM
  
  4178   Thu Jan 20 17:00:39 2011 AidanConfigurationLockingBallpark 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 AidanUpdateLockingUpper limit on frequency noise of ADC[Aidan, Kiwamu]
Kiwamu and I plugged the output from
a DS3456 function generator into the ADC
 Sine-wave-width-test_of_ADC.pdf 
  4176   Thu Jan 20 15:15:39 2011 kiwamuUpdateGreen Lockingstatus update: PLL connected to ADCI
realized that the black AA board I mentioned
  
  4175   Thu Jan 20 10:15:50 2011 josephbUpdateCDSc1scy errorThis is
caused by an insufficient number of active
DAQ channels in the C1SCY.ini file located
  
  4174   Thu Jan 20 04:43:28 2011 kiwamuUpdateGreen Lockingstatus update: PLL connected to ADC I
connected the PLL signal to the ADC on c1ioo. 
  
  4173   Thu Jan 20 04:03:02 2011 kiwamuUpdateCDSc1scy error I found
that c1scy was not running due to a daq initialization
  
  4172   Thu Jan 20 01:50:30 2011 KevinUpdateElectronicsPOX 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 kiwamuHowToCDSDAQ setup : another trickHere
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 KevinUpdateElectronicsPOX Transfer Functions The value of I_dc was a mistake.
The value should be 240 µA.
The widths of the resonance peaks
  
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