1SPP FIELDS DFB Quarterly June 16, 2015

Solar Probe Plus FIELDSInstrument Quarterly

Q2 2015

Digital Fields Board (DFB)

SPP FIELDS DFB Quarterly June 16, 2015

DFB Development Status (1of3)Q2 2015

EM Testing• During Q2, DFB EMs participated in several testing

activities at SSL – Supported MEP to SCM testing, MEP thermal tests,

and on-going interface tests – DFB team performed analysis, reviewed test results,

and participated in resolve of questions, concerns, and issues

– After integrated testing and subsequent disassembly of the MEP, the DFB EMs were swapped; EM1 now at SSL, EM2 at LASP

• Q2 also included extensive EM testing and FPGA code testing at LASP– Performed testing and validation of design; continues

over next week before committing to flight– The FPGA Digital Burst Memory (DBM) code was

completed and is now resident on the lab FPGA– FPGA code load updates sent to SSL for incorporation

on the EM1 for MEP testing– Considerable testing still needed to verify

performance and resolve bugs– Maintaining database list of complete and remaining

testing and bug tracking– Automated test scripts and self-checking test bench

work starting 2

EM thermal testing and test configuration at LASP

3SPP FIELDS DFB Quarterly June 16, 2015

DFB Development Status (2of3)Q2 2015

MB-DB mechanical alignment ‘investigation’• Worked to resolve the alignment concern

experienced during assembly of FPGA Daughter Board (DB) to Main Board (MB)– Both boards were assembled using the MEP HDLP

connector alignment jigs but the insertion force was significantly greater than the prior built mechanical test board done

– Metrology on the jigs indicated interference between the jigs and over constrained holes on both the MB and DB

– Built a new DB jig and building a new MB jig to resolve the interferences

– New jigs will be available for all SPF MB/DB PWAs: DFB, DCB, and TDS

Main Board to Daughter Board alignment

• During this jig investigation, it was determined that the Hypertac HDLP connector alignment socket holes were undersized on the MBs, not allowing the shoulder insertion into the PWB– This is the root cause of the height issue that has plagued the DB to MB connector stack– LASP will open up the DFB MB connector alignment holes to accommodate the shoulder, and

also will remove the PIPs holes on the Flight DFB MB– Advised the SPF team on this finding and recommended solution

SPP FIELDS DFB Quarterly June 16, 2015

DFB Development Status (3of3)Q2 2015

• Flight PWB spin commences in July with following updates:– Corrected design oversights in the E-Field Filters– Reduced inductor size for bottom side clearance– Added two charge bleed resistors in SCM

calibration power circuit– Increased hole sizes associated with the HDLP

connectors used to connect to FPGA DB– Increased isolation between channels to lower

crosstalk• Layout in process, review with SPF team in early

July, getting Fab quotes• All EEE flight component parts received

– Received Flight columned (CGA) SIDECAR ASICs, qty 2

– Received outstanding inductors (M83446/39-37F)– Once FM PWBs arrived, will send out for coupon

testing• Test equipment/GSE identified and in-process

– Completed trade on available test equipment for signal characterization, found that the Venable provides best frequency response measuring capability

• Continued writing scripts• Preparing flight docs

4

Flight ASIC SIDECAR

5SPP FIELDS DFB Quarterly June 16, 2015

DFB ScheduleQ2 2015

EM Characterization Testing in Q2

FM Fab and Assembly in Q3

6SPP FIELDS DFB Quarterly June 16, 2015

DFB Financial AssessmentQ2 2015

• DFB 533 actuals continue running slightly under plan – see staffing slide for labor– ODCs running pretty much on plan, with known higher part costs from proposed– Total costs still maintained within CV plan

• EVM correlates to schedule and budget– EVM actuals running under plan as reflected by 533 reporting and schedule

extension– Metrics will improved as flight build commences

• SSL has been very helpful with proactive funding and extending the Period of Performance thru 9/30/16

SSP-DFB Remaining Funds  AS OF May-15  Funding   $3,871,259  Cum-to-date spent $3,194,280  Encumbrances   $5,851  

funds remaining 5/31/15 $671,128 83%

Jun-15   $134,342  remaining funds as of 6/30/15 $536,786 86%     

Jul-15   $114,420  remaining funds as of 7/31/15 $422,366 89%

7SPP FIELDS DFB Quarterly June 16, 2015

DFB Staffing Q2 2015

Staffing Status:• Ken Stevens is now the FPGA lead and will continue in this role• David Summer transitioned out of lead, supporting Ken and David M

– David S will transition off SPF this summer, supporting only as needed• All other staffing remains the same• Staffing profile from Q1 updated with actuals to date

– EPs running below plan by 1-2; Scientists effort lower but increases over summer months, delayed start of FM build reduced EPs also, but will increase with build later in summer

LASP Staffing PlanDate 2015 2015 2015 2015 2015 2015 2015 2015 2015 2015  Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15

hours  812.00   786.00   926.00   962.00   630.25   666.60   650.00   642.80   636.20   503.00 EPs  4.67   4.52   5.32   5.53   3.62   3.83   3.74   3.69   3.66   2.89                      

ActualsLASP 360 337 413Ken 127 145 130Total Actuals 487 482 543EP Actuals 2.80 2.77 3.12

Equivalent People (EP) 174 hours/mnth