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ID Date Author Type Categoryup Subject Text Attachments
  2801   Thu Apr 15 14:47:28 2010 steveUpdateElectronics25MHZ oscillation of HP4195AThe 1979 vintage RF spectrum analyzer HP4195A 
sn2904J01587 shipped out  for repair
today to http://www.avalontest.com
 P1060246.JPGP1060249.JPG 
  2806   Mon Apr 19 07:38:07 2010 ranaHowToElectronicsRepair and Calibration of SR560: s/n 59650Frank noticed that this particular SR560
had an offset on the output which was unzeroable
by the usual method of tuning the trim pot
  
  2869   Mon May 3 01:16:50 2010 ranaHowToElectronicsMarconi phase noise measurement setup To try the 3-corner hat method
on the Marconis, I started to set up the
 pn.png 
  2879   Tue May 4 18:40:27 2010 ranaHowToElectronicsMarconi phase noise measurement setupTo check the UGF, I increased the gain
of the PLL by 10 and looked at how much the
error point got suppressed. The green trace
 Untitled.pngifrnoise.png 
  2904   Mon May 10 18:56:53 2010 ranaUpdateElectronicsUnexpected oscilaltionin the POY11 PDWhere did you get the 55nH based notch
from? I don't remember anything like that
from the other LSC PD schematics. This is
  
  2905   Mon May 10 19:09:45 2010 ranaUpdateElectronicsUnexpected oscilaltionin the POY11 PD


   
        
            
  
  2906   Mon May 10 19:29:33 2010 AlbertoHowToElectronicsNew Focus 1811 PD calibrated against New Focus 1611 PDI measured the output impedance of the
New Focus 1611 PD (the 1GHz one) and it is
50 Ohm for both the DC and the AC output.
  
  2913   Tue May 11 18:58:49 2010 ranaHowToElectronicsMarconi phase noise measurement setupJust a little while ago, at 2330 UTC on
5/11, I swapped the phase noise setup to
use another Marconi - this time its the 3rd
 Untitled.png 
  2914   Wed May 12 02:21:56 2010 ranaHowToElectronicsMarconi phase noise measurement setupFinally got the 3-cornered-hat measurement
of the IFRs done. The result is attached.
 pn.png 
  2975   Mon May 24 14:28:35 2010 kiwamuUpdateElectronicsbad power supply of a vme rackIn this morning I found daqawg didn't work.
After looking for the cause, I found
  
  2978   Tue May 25 07:22:59 2010 kiwamuUpdateElectronicsbad power supply of a vme rackNotes on May 25th
  
  2981   Tue May 25 10:06:09 2010 kiwamuUpdateElectronicsbad power supply of a vme rack I
got a VME crate from Peter's lab. It is already
  
  2982   Tue May 25 16:32:26 2010 kiwamuHowToElectronicsfront ends are back [Alex, Joe, Kiwamu]
Eventually
  
  3052   Sun Jun 6 08:08:05 2010 rana, sanjitSummaryElectronicsCapacitor Bridge TestTo get a feel for the Capacitive Bridge
problems, we setup a simple bridge using
fixed (1 nF) caps on a breadboard. We used
 CapacitanceBridge.png 
  3053   Mon Jun 7 07:39:38 2010 AlbertoOmnistructureElectronicsCapacitor Bridge Test


   
        
            
  
  3126   Mon Jun 28 11:27:08 2010 MeganUpdateElectronicsMarconi Phase NoiseUsing the three Marconis in 40m at 11.1
MHz, the Three Cornered Hat technique was
used to find the individual noise of each
 IndividualNoise11100kHzAllRanges.jpgIndividualNoise11100kHzSeparate.jpgDirectvsIndirectNoise.jpgFG12Noise.jpg 
  3170   Wed Jul 7 17:18:57 2010 AlbertoConfigurationElectronicsStochmon and LSC AM Stabilizer DecomissionedToday I disconnected and removed the
Stochmon box from the 1Y2 rack.
I
also removed the amplifiers that were sitting
  
  3285   Sat Jul 24 14:03:19 2010 AlbertoUpdateElectronicsFSS Oscilaltor Phase Noise Measurement[Rana, Alberto]
Today we measured the phase noise
of the oscillator used for the FSS.
 FSScrystalPhaseNoiseHigherGain.pdf 
  3286   Sat Jul 24 14:27:36 2010 ranaUpdateElectronicsFSS Oscilaltor Phase Noise MeasurementI reconnected the RF signal to the FSS
and to the FSS' EOM so that we could lock
the refcav again.
  
  3361   Wed Aug 4 19:50:58 2010 ranaConfigurationElectronicsRubidium clocks too hot: hut removedAlastair found that the foam hut that he
and Jan put on top of the Rb clocks to temperature
stabilize them was too good of an insulator.
 beat.png 
  3392   Tue Aug 10 15:23:35 2010 JennaUpdateElectronicsRubidium clock time constant[Jenna & Alastair]
We changed the locking time constant
on one of the Rubidium clocks using the RbMon
  
  3393   Tue Aug 10 16:55:38 2010 JennaUpdateElectronicsc1iovme restarted Alastair
and I restarted the c1iovme around the time
of my last elog entry (~3:20).
  
  3398   Wed Aug 11 12:58:56 2010 JennaUpdateElectronicsRubidium clock phase noiseI took some measurements of the clock this
morning, first without the box, then with
the box, then without the box again. All
 08_11_Rb_crazybox.pdf08_11_Rb_comparison.pdf 
  3400   Wed Aug 11 15:27:16 2010 JennaUpdateElectronicsRubidium clock phase noiseWe unsynched the clocks by unhooking the
1pps locking. I've added it to the plot of
the other measurements here, and we've divided
 08_11_Rb_withspec.pdf 
  3402   Wed Aug 11 16:38:02 2010 JennaUpdateElectronicsRubidium clock phase noise


   
        
            
  
  3409   Thu Aug 12 16:18:00 2010 JennaUpdateElectronicsRb clocks overnightI took a look at the data from the middle
of the night to see if it was significantly
quieter than the data from the day, but it
 rbcomp.pdf 
  3423   Fri Aug 13 20:58:20 2010 JennaSummaryElectronicsRubidium clock phase noise measurement Here's an overview of the rubidium
measurement:
 6x 
  3450   Fri Aug 20 16:41:43 2010 AlbertoUpdateElectronicsFrequency Generation Box Assembly CompletedI finished assembling the frequency generation
unit for the upgrade. I tested it through
to check that the power levels are as expected
 7x 
  3484   Sat Aug 28 08:17:51 2010 AbertoUpdateElectronicsFSS Frequency Generation Box under testI've taken the FSS frequency generation
box out of the 1Y1 rack. It's sitting on
one of the electronics benches. I'm measuring
  
  3499   Tue Aug 31 17:58:38 2010 AlbertoUpdateElectronicsFSS Frequency Generation Box - Phase NoiseA few weeks ago, on Jul 24, Rana and I
measured the phase noise of the FSS frequency
box (aka the 'Kalmus Box'). See elog entry
 2010-08-31_FSSPhaseNoise04modified.png 
  3501   Wed Sep 1 07:52:27 2010 AlbertoConfigurationElectronicsPMC board unplugged, turned on Sorensen switches on 1Y1 rackToday I put the FSS frequency box back
into the 1Y1 rack.
To power it on, I turned on the 24V
  
  3504   Wed Sep 1 08:40:28 2010 AlbertoConfigurationElectronicsPMC board unplugged, turned on Sorensen switches on 1Y1 rack


   
        
            
  
  3506   Wed Sep 1 11:34:39 2010 AlbertoUpdateElectronicsFSS Box Phase Noise from DAQI measured the phase noise of the LO output
of the FSS box from the DAQ. I'm attaching
the results.
 2010-09-01_FSSPhaseNoise.png2010-09-01_FSSphaseNoiseMeasurementSetup.png 
  3508   Wed Sep 1 12:34:14 2010 ranaUpdateElectronicsFSS Box Phase Noise from DAQThe differences between this setup and
the one used previously is the lack of the
50 Ohm terminator in the mixer output and
  
  3509   Wed Sep 1 16:29:28 2010 AlbertoUpdateElectronicsFSS Box Phase Noise from DAQ - Measurement setup modified


   
        
            
 2010-09-01_FSSPhaseNoise_DAQ_00-02_comparison.png2010-09-01_FSSPhaseNoise_DAQ_02.pngFSSphaseNoiseMeasurementSetup02.png 
  3510   Wed Sep 1 17:17:42 2010 ranaUpdateElectronicsFSS Box Phase Noise from DAQ - Measurement setup modifiedWith the setup now working, we should now
test the power filtering for the crystal
and amplifier.
  
  3520   Fri Sep 3 11:03:41 2010 AlbertoFrogsElectronicsCable cutting toolsI found this very interesting German maker
of cool cable cutting tools. It's called
Jokari.
  
  3522   Fri Sep 3 13:04:30 2010 KojiFrogsElectronicsCable cutting toolsYeah, this looks nice.
And I also like to have something
I have attached. This is "HOZAN P-90",
 P90.jpg 
  3529   Mon Sep 6 22:09:11 2010 AlbertoUpdateElectronicsRF Frequency Generation Box heat sink installed and testedLast week I noticed that the high power
amplifiers in the Frequency Generation Box
became hot after 2 hours of continuous operation
 DSC_2467.JPG2010-09-06_FreqBoxAmplifierTemperatureTrend.pngDSC_2433.JPG 
  3530   Tue Sep 7 08:56:00 2010 AlbertoUpdateElectronicsFrequency Generation Box Assembly - Phase Noise MeasurementsHere are the results of my phase noise
measurements on the 7 outputs of the Frequency
Generation Box. (BIN=95L applied by DTT).
 2010-09-03_FreqBoxPhaseNoise_AllOutputsComparison_smooth.png2010-09-03_FreqBoxPhaseNoise_AllOutputsComparison_smooth.pdf 
  3532   Tue Sep 7 13:31:49 2010 AlbertoUpdateElectronicsRF System - Frequency Distribution Box - Priority PlanWe need a distribution unit in the LSC
rack to: 1) collect the demod signals coming
from the Frequency Generation Box 2) adjust
 Visio-RFsystem_plan_distributiont.pngRFsystem_plant_distribution_priority.png 
  3552   Thu Sep 9 12:02:03 2010 AlbertoUpdateElectronicsFrequency Generation Box - Amplitude Noise MeasurementsI measured the amplitude noise of the source
outputs and the EOM outputs of the Frequency
Generation box.
 FreqBoxAmplitudeNoiseMeasurementSetup.pngFreqBoxAmplitudeNoise_BusbyBox_AllChannels.png 
  3555   Thu Sep 9 18:53:56 2010 AlbertoConfigurationElectronicsBusby Box, Rai's Box, SR554 in the RF cabinetI stored the Busby Box, the Rai's Box and
the SR554 preamp in the RF cabinet down the
Y arm.
  
  3565   Mon Sep 13 11:40:50 2010 AlbertoUpdateElectronicsFrequency Box Documentation Added to the SVNI uploaded all the material about the RF
frequency Generation Box  into the SVN under
the path:
 freqBoxSVNdierctoryStructure.png 
  3572   Tue Sep 14 18:07:41 2010 AlbertoUpdateElectronicsFrequency Box Documentation Added to the SVNI completed a LIGO document describing
design, construction and characterization
of the RF System for the 40m upgrade.
  
  3596   Thu Sep 23 02:23:04 2010 koji,taraSummaryElectronicsTesting new TTFSS I tested the new table top
frequency stabilization system(TTFSS), 
  
  3604   Fri Sep 24 00:56:35 2010 koji, taraUpdateElectronicstesting TTFSSWe
found that a transistor was broken from yesterday
spark too. We partially fixed TTFSS, and
  
  3607   Fri Sep 24 23:47:10 2010 koji, taraUpdateElectronicstesting TTFSS  Q3, a PZT2222A transistor,
on D0901846 is replaced by a GE-82. However,
the board is still not fully function.
  
  3608   Sat Sep 25 19:01:13 2010 KojiUpdateElectronicstesting TTFSSHow much current do you need for each voltages?
GE-82 was the only PNP transister
I could find in the lab. It's too old but
  
  3617   Tue Sep 28 21:11:52 2010 koji, taraUpdateElectronicsFixing the new TTFSSWe
found a small PCB defect which is an excess
copper shorting circuit on the daughter board,
 before.jpgafter.jpgbefore.jpgafter.jpg 
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