Clock Board Test and Preliminary Acceptance Criteria Ciemat (Madrid), April 2009 Juan de Vicente, Javier Castilla, Gustavo Martínez

Introduction CB configuration  Jumper settings and power checking  FPGA configuration CB test  General checks  Revision of CBv1 testing (performed by hand)  Improvements for CBv2 testing –automation of some repetitive task –adoption of a measureable acceptance criteria for CB production  Checkout documentation  Future upgrade for Clock Transition Board testing

JP19 JP13 JP11 JP17 JP6 JP8 JP12 JP10 JP5 JP3 JP15 JP4 JP9 JP1 JP2 Supply 3.3v Gnd CLK ref. Prog. FPGA Config. Clk aux JP9 Prog. FPGA Gnd CLK ref. Gnd Rst aux. Gnd JP7Gnd TOP view CB configuration (Jumpers settings) 1 CB configuration

TP35+VAC+15v TP36-VAC-15v TP38+5VA+5v TP39-5VA-5v Analog Voltages TP41GNDreference Digital Voltages TP42GND reference TP44+5VIN +5v TP43+3.3VIN-3.3v Power supply checking

FPGA configuration Firmware Load files DocDb#2420 Source files DocDb#2299 CB configuration

CB test General checks: 1.Clock channel chain (126 electronic chains) 2.Telemetry 3.Clock waveform 4.Front panel ports

Goals Ensure the range ±10 volts for all clock channels (126) Detecting possible defective components, assembly faults, etc. Produce the calibration file To provide an acceptance criteria Method Calibration  To calculate calibration constants (coef1,coef2) for all clocks  Visual inspection of the calibration file for prematurely anomalies detection  Updating csv file with the calibration file Clock Channel histogram test  Histogramming the differences between programmed voltages and measured voltages  Computing rms 1. Clock channel chain checking

Multimeter Socket Systran Parallel port Serial port panDaemon MEC Computing calibration constants from data by hand connection clock-multimeter by hand setting ±10 volts in DAC counts with MEC by hand readout of the multimeter for each Clock DAC loop CBv1 calibration review 1 Clock CBv1 By hand procedure 1. Clock channel chain checking

Multimeter Socket Systran Parallel port Serial port panDaemon MEC CBv1 calibration review 1 Clock CBv1 1. Clock channel chain checking Drawbacks of by hand process measurements by hand - Error prone Computing calibration constants from data by hand connection clock-multimeter by hand setting ±10 volts in DAC counts with MEC by hand readout of the multimeter for each Clock DAC loop By hand procedure

9CCD Emulator + Mux 135:1 Improving Clock Board Testing Setup for CBv2 MCB Clock Board V1/V2 PAN PC Systran Link CTB V pin cable Mux 9 CCD emulator Out port (scope) 1 clock Input Connector Out port (meter) 135 clocks Multimeter/Scope THS710 Clock output Serial Port Video TDS5000 Scope Clock output Monsoon crate Parallel Port

Multimeter THS730 Socket Systran 1 Clock Parallel port Serial port panDaemon MEC Clock cable (135) Parallel port Serial port Socket CBv2 CBcalibration.exe Automatic CB calibration Mux CCD emulator BOARD selectClockFromParallelPort setClock(±10 volts in DAC counts) for each Clock DAC loop readoutClockVoltageFromSerialPort output: CBcalibration.csv 1. Clock channel chain checking

calibration file inspection visual inspection of calibration file to detecting anomalous values Anomalous value due to defective components 1. Clock channel chain checking

Goals Once calibrated  Histogramming the differences between programmed voltages and measured voltages Procedure Measuring 9 points (±8,±6,±4,±2,0 volts) per clock DAC 2 DAC per clock, 126 clocks -> 2268 DAC clock voltage measurements (9x2x126) Computing rms Constraints DAC resolution= 95 mV (+10 to -10 volts within operational DAC range: 22 to 233 DAC counts) Multimeter resolution=10 mV Electronic tolerances Clock Channel histogram test 1. Clock channel chain checking

Multimeter THS730 Socket Systran 1 Clock Parallel port Serial port panDaemon MEC Clock cable (135) Parallel port Serial port Socket Clock channel histogram test CBv2 CBhistogram.exe selectClockfromEmuBoard( ) setClock(±8, ±6, ±4, ±2,0 volts ) for each Clock DAC loop measureClockVoltage( ) output: CBhistogram.csv Mux CCD emulator BOARD 1. Clock channel chain checking

Result  Histogram of differences between programmed voltages and measured voltages  Computing the rms of the differences (rms_clocks) Clock channel histogram test rms_clocks=73mVrms_clocks=258mV ok Bad channel 1. Clock channel chain checking

rms_clocks<150mV Acceptance criteria: Clock Channel rms (rms_clocks) rms_clocks=73mV 1. Clock channel chain checking

Goals Detecting possible defective components in telemetry channels Computing rms Method Histogram  Measuring 9 points (± 8,±6,±4,±2,0) per clock DAC setting  756 DAC clock voltage measurements (42 clocks x 2 DACs x 9 settings)  Computing rms 2. Telemetry channel checking

Socket Systran Parallel port Serial port panDaemon MEC CBv2 CBhistogram.exe 2. Telemetry channel checking Telemetry channel histogram setClock(±8, ±6,±4,±2,0 volts ) for each Clock DAC loop getClockTel( ) output:CBhistogram_tel.csv Socket

Result  Histogram of the differences of programmed voltage and measured voltages in telemetry  rms_tel Telemetry channel histogram Rms_tel=101 mV ok Bad channel Rms_tel=360mV 2. Telemetry channel checking

rms_tel<200mV Acceptance criteria: Telemetry rms rms=101 mV ok 2. Telemetry channel checking

3. Clock waveform visualization Procedure The output of the mux of the CCDemulation board is connected to the scope Initializing MEC in continuous mode: clocks running periodically Running exploreSignals program  A flexible program for selecting any clock out of 135 –By order, by name, by CCD, etc. Visualization of all clock waveforms at the scope

scope Socket Systran 1 Clock Parallel port Serial port Initialization Run clocks periodically (Continuos mode) Clock cable (135) Parallel port Clock waveform visualization CBv2 loop 2. Waveform visualization MEC CB exploreSignals Mux CCD emulator BOARD 1. selectClock( )

4. Front panel checking Procedure Clocks are programmed with incremental values according to their order in the clock frame. Then clocks are selected in order in the front panel and verified their values with the multimeter

scope Socket Systran 1 Clock Parallel port Serial port panDaemon FrontPanel Front panel check CBv2 setClock(i) to a value Voltage Level visualization for each Clock loop MEC CB frontPanel muxSlct(i) Socket

Checkout documentation CBv2.1#n General checking Jumper settingsok Powerok FPGA configurationok Clock channelsrms_clock=80 mV histogram.csv Telemetryrms_tel=120 mV histogram_tel.csv Clock waveformok Front panelok

Clock Transition board testing Next CB testing setup upgrade: Including the new cable for testing CTBv2 A verified CTB will be used for testing all CBv2.1 On the opposite, a verified CB will be used for testing the rest of CTB

Conclusion Setup for testing the Clock Board production almost ready at CIEMAT (Madrid) Automatic calibration procedure Automatic clock channels verification Automatic telemetry verification Clock waveform verification Front panel verification Two measurable acceptance criteria:  clock channel rms  telemetry rms Checkout documentation Next upgrade for testing the CTB (requiring the new cable)