1. Todd Moore for the DES CollaborationNov 28, 20061 Noise test hardware & software setup. Earth grounding scheme utilized for noise tests. Block diagram of earth & signal grounds. UofI Monsoon test stand wiring scheme. Test results with linear supplies. Test results with Vicor supplies. Conclusion… Vicor Noise Test Results Ver. 7.0

2. Todd Moore for the DES CollaborationNov 28, 20062 Noise Test Hardware Setup All test are run with either Linear supplies or Vicor supplies attached to original Monsoon 6-slot DHE. Remote sensing was removed & local sensing added. Noise measurements are taken with video inputs: shorted, floating, & connected to ccd emulator thru video cable supplied by Fermilab. The Vicor +3.3vdc voltage is running without uRAM.

3. Todd Moore for the DES CollaborationNov 28, 20063 Noise Test Software Setup All exposures are long.Monsoon is running Fermilab focalplane on cyclone:/home/monsoon/cfg/_fnal/. Sequencer for 6-slot readout is ReadType1d.ucd. All exposures are long. # of pixels for long exposure is 4146 (4096+50) rows X 2248 (2048+100) columns. Readout time is at 11uS/pixel. All Offsets are set to 1.0v. Channel 0 & 2 video inputs are used for readout. All datasets are located on cyclone.hep.uiuc.edu:/home/monsoon/data/vicor_noisetest/…. Data is analyzed for a long run using./noiselast_wrows.sh. Data is analyzed visually using DS9 or FV4.2.

4. Todd Moore for the DES CollaborationNov 28, 20064 NOTES: CCD TEST RACK CONNECTS TO EARTH GROUND THRU POWER STRIP GOING TO OUTLET & PROVIDES ONE POINT FOR EARTH GROUND REFERENCE. ON LINEAR SUPPLIES, ALL ANALOG & DIGITAL RETURNS ARE TIED TOGETHER AT THE SUPPLY & AT THE MONSOON BACKPLANE. ON VICOR SUPPLIES, ANALOG RETURNS ARE TIED TOGETHER AT THE SUPPLY; DIGITAL RETURNS ARE TIED TOGHETHER AT THE SUPPLY, AND BOTH ANALOG & DIGIAL RETURNS ARE TIED TOGETHER AT THE MONSOON BACKPLANE. THE ANALOG & DIGITAL RETURNS ARE CONNECTED FROM THE MONSOON BACKPLANE TO THE TEST RACK TO TIE EARTH GROUNDS AND SIGNAL GROUNDS TOGETHER. THE +/-15VA, +/-5VA, +5VD, & +3.3VD LINEAR SUPPLY CASE IS @ EARTH GROUND, WHILE VOLTAGE OUPUTS ARE ISOLATED. THE -28VA SUPPLY CASE & VOLTAGE OUTPUTS ARE ISOLATED. ISOLATED EARTH GROUND BANANNA PLUG FROM SUPPLY IS CONNECTED TO TEST RACK TO TIE -28V SUPPLY EARTH GROUND INTO SYSTEM. VICOR POWER SUPPLY CASE IS @ EARTH GROUND WHILE VOLTAGE OUTPUTS ARE ISOLATED. GROUNDING STRAP CONNECTS VICOR CASE TO RACK TO BRING SIGNAL & EARTH GROUNDS TOGETHER. UofI Earth Grounding Scheme

5. Todd Moore for the DES CollaborationNov 28, 20065 Block Diagram Of Grounding Scheme NOTES: RACK IS THE SINGLE POINT FOR EARTH GNDS 1. Rack is single point for all Earth Grounds, all AC Power (+ Egnd) comes from single power strip mounted on rack. 2. Vicor Case, which is fed Egnd from A/C plug, is attached to Rack with grounding strap. 3. Linear Case is mounted to Rack & thus is @ Earth Ground. 4. Monsoon Case & backplane gnds are attached to rack, which is @ Egnd. Linear Supply -28VA Fan Panels Vicor supply (Case @ Earth GND) Monsoon Case(@EGND) Monsoon Backplane Metal Rack AGND & DGND Planes Digital & Analog Voltage Returns EGND UofI CCD Test Stand Grounding Scheme Linear Supply: +/-15VA, +/-5VA, +5VD, & +3.3VD Note 1: Note 3: Note 4: Note 2:

6. Todd Moore for the DES CollaborationNov 28, 20066 UofI Monsoon Test Stand Wiring Scheme

7. Todd Moore for the DES CollaborationNov 28, 20067 Linear Supply Test Results Channel 0Channel 2 Test DateConditionsMeanRMSMeanRMSNotes/Results FITSPS Test 3 7-Nov-06 Linear supplies are attached to the original Monsoon DHE and unloaded. -28van & +48van are not connected. Video input is shorted at trans board. Egnd and backplane gnds are NOT connected together at the backplane. 80,7203.9683,0706.58 Get a baseline measurement with original test stand attached to linear supply. Earth grounds haven’t been connected to signal grounds. This is the same test setup as in previous versions. Osc. Occurred every 80 counts or every 880us, or @ 1.13kHz nTestNov7_ tst3.fits nTestNov7_ tst3.ps Test 4 7-Nov-06 Same as test3, above, except Egnd & return gnds are connected together at the backplane. 80,7103.9283,0405.30 Connecting Egnds to signal returns @ backplane didn’t increase the sigma. Osc. Occurred every 80 counts or every 880us, or @ 1.13kHz nTestNov7_ tst4.fits nTestNov7_ tst4.ps Test 5 7-Nov-06 Same as test4, above, except - 28van IS connected. +48van is not connected. 80,6904.1483,0004.11 Connecting -28van, w/ Egnd attached, didn’t increase the sigma. Osc. Decreased but is still present. nTestNov7_ tst5.fits nTestNov7_ tst5.ps Test 6 7-Nov-06 Fermilab video cable (w/ ccd emulator), and Bias is attached to ccd acq. Trans. Board. Clk is attached to the cbb trans board. The shield on the video cable is NOT conneted to Egnd. -28van IS connected. +48van is NOT connected. 80,86026.2383,19024.99 Connecting video cable w/ ccd emulator caused sigma to raise. nTestNov7_ tst6.fits nTestNov7_ tst6.ps Test 7 7-Nov-06 Same as test7, above, except video cable shield IS connected to Egnd.80,87019.4483,16021.11 Connecting video cable shield to Egnd didn’t caused sigma to raise. But there is a double peak in the noise curve. nTestNov7_ tst7.fits nTestNov7_ tst7.ps

8. Todd Moore for the DES CollaborationNov 28, 20068 Linear Supply Plot Results Test 3, Nov 7, 2006

9. Todd Moore for the DES CollaborationNov 28, 20069 Test 4, Nov 7, 2006 Linear Supply Plot Results

10. Todd Moore for the DES CollaborationNov 28, 200610 Test 5, Nov 7, 2006 Linear Supply Plot Results

11. Todd Moore for the DES CollaborationNov 28, 200611 Test 6, Nov 7, 2006 Linear Supply Plot Results

12. Todd Moore for the DES CollaborationNov 28, 200612 Test 7, Nov 7, 2006 Linear Supply Plot Results

13. Todd Moore for the DES CollaborationNov 28, 200613 Vicor Supply Test Results Channel 0Channel 2 Test DateConditionsMeanRMSMeanRMSNotes/Results FITSPS Test 13 21- Nov- 06 Vicor supplies are attached to the original Monsoon DHE and unloaded. Egnds & return gnds are connected together at the backplane. Fermilab video cable (w/ ccd emulator), and Bias is attached to ccd acq. Trans. Board. Clk is attached to the cbb trans board. The shield on the video cable IS conneted to Egnd. -28van IS connected. +48van is NOT connected. 80,92028.6483,2524.80 Get a baseline measurement with original test stand attached to Vicor supply, including - 28van. All Egnds are tied to rack. Egnds have been connected to signal grounds @ backplane. nTestNov21 _tst13.fits nTestNov21 _tst13.ps Test 14 21- Nov- 06 Same as test13, above, except -28van is NOT connected. +48van is not connected 80,96028.3783,29024.00 No change in sigma when -28van is removed. nTestNov21 _tst14.fits nTestNov21 _tst14.ps Test 15 21- Nov- 06 Same as test13, above, except video inputs are floating (vid connector removed from ccd acq trans). Clk & Bias are still attached. -28van still attached. 80,76011.9883,09011.20 Take measurement with video inputs floating. Removing video cable from video inputs caused sigma to drop by half. nTestNov21 _tst15.fits nTestNov21 _tst15.ps

14. Todd Moore for the DES CollaborationNov 28, 200614 Test 13, Nov 21, 2006 Vicor Supply Plot Results

15. Todd Moore for the DES CollaborationNov 28, 200615 Test 14, Nov 21, 2006 Vicor Supply Plot Results

16. Todd Moore for the DES CollaborationNov 28, 200616 Test 15, Nov 21, 2006 Vicor Supply Plot Results

17. Todd Moore for the DES CollaborationNov 28, 200617 Conclusion… Baseline measurements for linear & Vicor supplies are in-line with previous measurements. IE. Monsoon system is functioning normally. Adding FNAL video cable + ccd emulator caused the sigma to go up to ~25 counts RMS for both linear & Vicor supply. IE. No real difference between linear or VIcor supplies attached to Monsoon system. I don’t see the same large numbers of sigma as seen at FNAL. Ground scheme may be different than FNAL…May need to re-run some tests with different grounding scheme.