Citation for published item:e eroD pF nd eloisioD F nd em nsD tF nd em toD iF nd entonelliD vF eF nd er moD gF nd ermstrongD F nd erquerosD pF nd es noD uF nd eshleyD wF nd f kesD wF nd f l zsD gF nd f lzerD eF nd f m D eF nd f rkovD wF nd f rrioD tF eF nd fen owD F nd fernl¤ ohrD uF nd feshleyD F nd figongi riD gF nd fil ndD eF nd filinskyD eF nd fiss ldiD iF nd fite uD tF nd fl n hD yF nd fl siD F nd fl zekD tF nd foissonD gF nd fon nnoD qF nd fon rdiD eF nd fon volont D gF nd fonnoliD qF nd fr idingD gF nd fr uExogu¡ eD F nd fregeonD tF nd frownD eF wF nd fug evD F nd fulg relliD eF nd fulikD F nd furtonD wF nd furtovoiD eF nd fusettoD qF nd f¤ ott herD wF nd g meronD F nd g p l iD wF nd g proniD eF nd g r veoD F nd g rosiD F nd g s oneD iF nd gerrutiD wF nd gh tyD F nd ghenD eF nd ghenD F nd gherny kov D wF nd ghik w D wF nd ghudo D tF nd gohenE nugiD tF nd gol fr n es oD F nd gonfortiD F nd gontrer sD tF vF nd gost D eF nd gotterD qF nd govinoD F nd govoneD qF nd gum niD F nd gusum noD qF nd h9emm ndoD pF nd h9 rsoD hF nd h nielD wF nd h zziD pF nd he engelisD eF nd he ges reD qF nd he pr n oD eF nd he prond tD pF nd de qouvei h l inoD iF wF nd he visioD gF nd de los eyes vopezD F nd he vottoD fF nd de x uroisD wF nd he lm D pF nd hel ntoD wF nd helg doD gF nd dell olpeD hF nd hi qirol moD F nd hi qiulioD gF nd hi ierroD pF nd hi enereD vF nd horoD wF nd hourn uxD tF nd hum sD hF nd hw rk d sD F nd h¡ % zD gF nd i rD tF nd ig ertsD uF nd iine keD F nd ils¤ sserD hF nd is h hD F nd p l et Eqon lvesD hF nd p sol D qF nd pedorov D iF nd pern¡ ndezEf rr lD eF nd perr ndD qF nd pesquetD wF nd pi ndriniD iF nd pi ssonD eF nd pilipov¡ % D wF hF nd piorettiD F nd pontD vF nd pont ineD qF nd pr n oD pF tF nd goromin D vF preix s nd pujit D F nd pukuiD F nd punkD F nd p¤ orsterD eF nd q dol D eF nd v¡ opezD F q r i nd q r z r zykD wF nd qigliettoD xF nd qiord noD pF nd qiuli niD eF nd qli ensteinD tF nd qn tykD F nd qoldoniD F nd qr r zykD F nd qr i niD F nd qr h mD tF nd qr ndiD F nd qr notD tF nd qreenD eF tF nd qri0thsD F nd qunjiD F nd r ko y nD rF nd r r D F nd r ss nD F nd r y shid D wF nd rellerD wF nd reloD tF gF nd rintonD tF nd rn tykD fF nd ruetD tF nd ruettenD wF nd rumenskyD F fF nd russeinD wF nd r¤ or ndelD tF nd skenoD F nd sn d D F nd snomeD F nd snoueD F nd snoueD F nd snoueD F nd sok D uF nd soriD wF nd t quemierD tF nd t ne ekD F nd t nkowskyD hF nd tungD sF nd u retD F nd u t giriD rF nd uimeswengerD F nd uimur D F nd un¤ odlsederD tF nd uo hD fF nd uo otD tF nd uohriD uF nd uominD xF nd uonnoD F nd uos kD uF nd uoy m D F nd ur usD wF nd uu oD rF nd wezekD qF uuke nd uushid D tF nd lom r D xF v nd v likD uF nd v m nn D qF nd v ndtD rF nd v pingtonD tF nd v porteD F nd veeD F nd veesD tF nd vef u heurD tF nd ven inD tFE F nd vetoD qF nd vindforsD iF nd vohseD F nd vom rdiD F nd vongoD pF nd vopezD wF nd vu relliD pF nd vuqueEis mill D F vF nd v¡ opezEgotoD F nd w roneD wF gF nd w ierD qF nd w l gutiD qF nd w nd tD hF nd w nev D qF nd w ng noD F nd w r owithD eF nd w rt¡ %D tF nd w rt¡ %nezD wF nd ...

The Cherenkov Telescope Array (CTA) is the next generation ground-based very high energy gamma-ray observatory. The Large-Sized Telescope (LST) of CTA targets 20 GeV -1 TeV gamma rays and has 1855 photomultiplier tubes (PMTs) installed in the focal plane camera. With the 23 m mirror dish, the night sky background (NSB) rate amounts to several hundreds MHz per pixel. In order to record clean images of gamma-ray showers with minimal NSB contamination, a fast sampling of the signal waveform is required so that the signal integration time can be as short as the Cherenkov light flash duration (a few ns). We have developed a readout board which samples waveforms of seven PMTs per board at a GHz rate. Since a GHz FADC has a high power consumption, leading to large heat dissipation, we adopted the analog memory ASIC "DRS4". The sampler has 1024 capacitors per channel and can sample the waveform at a GHz rate. Four channels of a chip are cascaded to obtain deeper sampling depth with 4096 capacitors. After a trigger is generated in a mezzanine on the board, the waveform stored in the capacitor array is subsequently digitized with a low speed (33 MHz) ADC and transferred via the FPGAbased Gigabit Ethernet to a data acquisition system. Both a low power consumption (2.64 W per channel) and high speed sampling with a bandwidth of >300 MHz have been achieved. In addition, in order to increase the dynamic range of the readout we adopted a two gain system achieving from 0.2 up to 2000 photoelectrons in total. We finalized the board design for the first LST and proceeded to mass production. Performance of produced boards are being checked with a series of quality control (QC) tests. We report the readout board specifications and QC results.

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