MGPAlinearity - MGPA Linearity Non-linearity measurements...

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1 MGPA Linearity Mark Raymond (Dec.2004) Non-linearity measurements in the lab hardware description method results
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2 Linearity test bench Digital Sequencer AWG (AG33250) programmable attenuator (HP8494+HP8495) 1 db steps MGPA 14-bit ADC (SIS3301) prog. delay (0 – 250 ns 1 ns steps) trig. trig. 10ns AWG prog. attenuator 14-bit VME ADC MGPA test board prog. delay level shift LabView automated use prog. attenuator, rather than changing amp. of AWG O/P to avoid contribution from AWG O/P stage linearity 14-bit ADC -> negligible INL and DNL contribution to measurement for MGPA test board use either RAL PCB with socket easy chip exchange or VFE card verify performance in final configuration 40 MHz clock and ADC trig. Cinj
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3 MGPA test board photos RAL board with socket modified VFE card (latest version) APD in light tight enclosure diff. to s.e. conversion differential MGPA O/P signals accessed between MGPA and ADC charge injection
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4 Linearity measurement procedure Digital Sequencer AWG (AG33250) programmable attenuator (HP8494+HP8495) 1 db steps 14-bit ADC (SIS3301) prog. delay (0 – 250 ns
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