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5.6

Example of data readout

This examples helps to understand the data analysis and shows how data are extracted from the
raw data samples. Data were taken in channel 0.

Sample

Raw value

Time Hex

Dec

Absolute

abs. Hex

Register/Value

In 1,5625ns

units

Used in calculations

78E

30 -> #028

770

762

78B

1C 78B

1931

001B

Mean of

761

1889

-15

FFFFFFFFF1

4 preceeding

77C

14 77C

1916

000C

779

77C

10 77C

1916

000C

75B min. 1

75B

1883

-21

FFFFFFFFEB

32 -> #00C

793

1939

0023

33 -> #FEB

82D

2093

189

00BD

Figure 11: Example of raw data (pileup event with small noise peaks)

Содержание AVM16

Страница 1: ...1 16 channel ADC 160 MHz with features extraction User s Manual W Ie Ne R AVM16 AVX16...

Страница 2: ......

Страница 3: ...of any kind even if W Ie Ne R has been advises of the possibility of such damages arising from any defect or error in this manual or product Any use of the product which may influence health of human...

Страница 4: ...VME addressing 13 5 4 Software registers 14 5 4 1 Overview of registers 14 5 4 2 First group of registers control FPGA 15 5 4 3 Registers that are sent to all ADC FPGAs too 18 5 4 4 Registers that ar...

Страница 5: ...triggering mode Integration time window relative to trigger time or to pulse arrival time Time resolution 1 5625 ns interpolated signal t0 Feature extraction Amplitude Integral Time of arrival Multipl...

Страница 6: ...ut is present on all boards AMP ADC AMP ADC AMP ADC AMP ADC Feature extraction FPGA AMP ADC AMP ADC AMP ADC AMP ADC Feature extraction FPGA AMP ADC AMP ADC AMP ADC AMP ADC Feature extraction FPGA AMP...

Страница 7: ...y others which allows for minimizing of the readout data volume and thus increasing the readout speed The user may still choose to read a full set of samples recorded in the buffer or read s ubset of...

Страница 8: ...s FWHM The anti aliasing filter can be customized or removed by the manufacturer or by an authorized person see figure 2 An on board pulse generator provides test pulses for every channel R1 51 1 2 3...

Страница 9: ...els overcomes the trigger level set in the register 0x110 with reference to the actual baseline all non inhibited channels are read out The trigger condition is ADC_VALUE BASE_LINE TRIGGER_LEVEL and i...

Страница 10: ...10 5 Technical description of AVM 16 AVX 16 Figure 6 shows location of key connectors user may interface to Figure 4 The AVM 16 AVX 16 Printed circuit board...

Страница 11: ...ogic is implemented on 4 SPARTAN 3 FPGAs each one serving 4 ADCs and one VIRTEX 5 Control FPGA as interface between the 4 ADC FPGAs and the VME Bus The Control FPGA is VIRTEX 5 XC5VLX50T The FPGAs ser...

Страница 12: ...a signal distributed on dedicated user lines of the VME bus present on request Data from within the boundaries of the window control are transferred to the Waveform Feature Extraction section and if...

Страница 13: ...Pi time for the first non zero value Pz pulse start time calculated from slope crossing the pedestal value Pa signal amplitude Pq signal integral charge PPi minimum value before pileup PPz pileup pul...

Страница 14: ...16 channels and address the corresponding ADC FPGA The range of the fourth group is foreseen for access to the readout data in single mor in block transfer mode The meaning and functions of the intern...

Страница 15: ...f integral of the signal analyzing 0x12C aclk_shift step phase shift factor status 0x130 0x13C lb_test 4 rw test register for the local bus to 4 SPARTAN s reserved 0x200 0x23C base_line 16 auto base l...

Страница 16: ...DAVAL Data available compared to the DVAL bit this bit is already set when the first word is present in a FIFO DVAL is only set when all data were written in the FIFOs and thus the dlength register i...

Страница 17: ...this way it is possible to insert pauses after commands tp_dac 0x01C With bit 3 in act register it is possible to generate a test pulse through a DAC The height of the test pulse is set by means of t...

Страница 18: ...he corresponding ADC FPGA sends the trigger time to VIRTEX 5 which forwards it to all ADC FPGAs in order to start the read out 3 VERBOSE When this bit is set the pairs of values for minima and maxima...

Страница 19: ...the supplementary integral window in the search main window The time unit is the ADC sample rate 6 25 ns The value must be bigger or equal 4 in order for the 4 values leading the window to be present...

Страница 20: ...5 4 4 Registers that are individually available for every channel base_line 16 0x200 to 0x23C In the FPGA the ADC mean value for each channel is computed continuously ADC input test pulses are exclude...

Страница 21: ...llows according to the following list for the first channel channel 0 Label 0x30 window start time first value referred to the trigger time that is the time reference and corresponds to t 0 or window...

Страница 22: ...and baseline for pile up peaks the last minimum is used instead of the baseline using 1 2 and 4 bins The choosen value corresponds to the biggest X for which h Y h where h is the peak heigth From the...

Страница 23: ...23 Figure 9 upper picture graphical representation of the extracted features Lower picture input parameters with details on SW_INT_LENGTH...

Страница 24: ...rlier by the user defined parameter SW_INTLENGTH Note all labels refer to channel 0 In order to decode labels for other channels following formula applies Label for channel 0 e g 0x37 4 0x10 channel n...

Страница 25: ...lute abs Hex Register Value In 1 5625ns units Used in calculations 1 78E 28 30 028 2 770 24 3 762 20 4 78B 1C 78B 1931 27 001B Mean of 5 761 18 761 1889 15 FFFFFFFFF1 4 preceeding 6 77C 14 77C 1916 12...

Страница 26: ...2421 517 0205 25 994 FC8 994 2452 548 0224 26 94F FC4 94F 2383 479 01DF 27 94D FC0 94D 2381 477 01DD 28 945 FBC 945 2373 469 01D5 29 904 FB8 904 2308 404 0194 30 929 FB4 929 2345 441 01B9 31 901 FB0...

Страница 27: ...BB 2235 331 014B 58 862 862 2146 242 00F2 59 85D 85D 2141 237 00ED 60 855 855 2133 229 00E5 61 802 802 2050 146 0092 62 81A 81A 2074 170 00AA 63 7E5 7E5 2021 117 0075 64 7BB 7BB 1979 75 004B 65 7EF 7E...

Страница 28: ...raw data value was sampled This values were not read out from the ADC they were added manually basing on the window start time value The window start time is part of the data analysis and can be read...

Страница 29: ...integrals averages and zero crossing times Extracted Data Meaning 370770 mean level 370779 mean of 4 preceeding 206BBB Integral 37077A mean of 4 trailing 300028 trigger window start time 310770 mean...

Страница 30: ...30...

Страница 31: ...User s Manual AVM16 AVX16 W Ie Ne R Plein Baus GmbH September 10 31...

Страница 32: ......

Страница 33: ...User s Manual AVM16 AVX16 W Ie Ne R Plein Baus GmbH September 10 33...

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