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1. SCRIPTION __ 1 orango a SPES Ee ground of all internal circuits ASISI ITIITI IITE IEIET IEEE EEEE TELETELE TETELE EEEE ASRR EE EEEE EEEE EET EE ONO NS OOO NN SS SE HERE The voltage at PIN3 is a monitor signal proportional to the measured value of high 3 yellow HV Monitor voltage output 2 HVmax corresponds to 10V at PIN3 HVmin corresponds to approx 4V at PIN3 The high voltage output 1s enabled by PIN4 4 blue Enable L enable ey _ disable Positive DC voltage applied to PIN6 sets up high voltage value HV 6 green HV Program l HVmax corresponds to 10V at PING DAZJU corresponds to approx 4V at PIN6 a means iogical 6 0 ie level OV 1 means logical 1 high level SV INTERFACE CIRCUITS Q Switch HV Monitor PIN4 3k3 Enable 10k PING 47k HV Program HV OUTPUT Molex microfit 2x3 HV Output 65 4 32 1 QBD mini UP modification QBD mini DN modification _PIN color DESIGNATION DESCRIPTION PIN color DESIGNATION DESCRIPTION 1 blue Negative HV Negative 1 red Positive HV Positive 2 5 N C 2 5 N C Safety Warning This equipment produces high voltages that can be very dangerous Don t be careless around this equipment e To provide safety the QBD series Pockels cell driver module is designed to be powered with supply voltage 24VDC which must be galvanically separated from mains e tis the user s responsibility to en2. rev 1 06 2015 09 22 QBD mini Pockels cell drivers User manual Warning The output of this Pockels cell driver is bipolar symmetrical Usage of non symmetrical load or non symmetrical probe can damage the driver Only differential probes should be used Appearance board layout INTERFACE HV PROGRAM TRIMPOT 24V ENABLE JUMPER HV PROGRAM JUMPER HV OUTPUT There are three Molex microfit connectors two jumpers and one trimmer potentiometor on Pockels cell driver board The description is below ENABLE JUMPER ENABLE JUMPER can be used instead of ENABLE signal PIN4 of INTERFACE Do not use ENABLE JUMPER and ENABLE signal at the same time HV PROGRAM JUMPER AND HV PROGRAM TRIMPOD __ Use HV PROGRAM JUMPER instead of HV PROGRAM signal PIN6 of INTERFACE If jumper is on it sets output voltage accordingly to HV PROGRAM TRIMPOT state Do not use HV PROGRAM JUMPER and HV PROGRAM signal at the same time 24V Molex microfit 2x2 24V 4 2 1 __ PIN color DESIGNATION DESCRIPTION FT m NUR positive SR to turn on the u A NN l i MR p 24VDC PEPE LELECECTELECECTELE CEST ELEC CT ELLE ET ELE CEST ELLE CE ELE CE EE ELELEETELE OOOO LE ELEC ELEL INTERFACE Molex microfit 2x3 Interface 6 5 4 32 1 _ _ PIN color _ DESIGNATION DE
3. sure that personnel are prevented from accidentally contacting the QBD series Pockels cell driver module especially the high voltage connector and cable Casual contact could be fatal Output cables must have good isolation for output voltage and low capacitance e After shut down do not touch the load until it has been discharged Use an appropriate measurement device to check for complete discharge e Disconnect the QBD series Pockels cell driver module from DC power supply before changing electrical or mechanical connections Operations Manual control Connect 24VDC power supply pulse generator and Pockels cell Setup HV PROGRAM JUMPER Turn on 24VDC power supply Setup ENABLE JUMPER Use HV PROGRAM TRIMPOT to set up required output voltage Send driving pulses from pulse generator to PINI of INTERFACE To power down the driver turn off 24VDC power supply or remove ENABLE JUMPER Operations Automatic control Connect 24V INTERFACE and HV OUTPUT connectors to the board Remove HV PROGRAM JUMPER remove ENABLE JUMPER DISABLE the high voltage output Apply 24VDC to the Pockels cell driver Set up the desired output voltage by applying the corresponding DC voltage to PIN6 of INTERFACE HV PROGRAM ENABLE high voltage output Send driving pulses to PINI of INTERFACE 8 To power down the driver remove 24VDC power or DISABLE high voltage output OM B WN JG
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