Spectrum Brands MC.31XX - page 70

70 MC.31xx Manual

Channel Trigger Trigger modes and appendant registers

Channel pulsewidth trigger for long positive pulses

The analog input is continuously sampled with the selected

sample rate. If the programmed triggerlevel is crossed by

the channel’s signal from lower to higher values (rising

edge) the pulsewidth counter is started. If the signal crosses

the triggerlevel again in the opposite direction within the

the programmed pulsewidth time, no trigger will be detect-

ed. If the pulsewidth counter reaches the programmed

amount of samples, without the signal crossing the trigger-

level in the opposite direction, the triggerevent will be de-

tected.

The pulsewidth trigger modes for long pulses can be used

to prevent the board from triggering on wrong (short) edges

in noisy signals.

Channel pulsewidth trigger for long negative pulses

The analog input is continuously sampled with the selected

sample rate. If the programmed triggerlevel is crossed by

the channel’s signal from higher to lower values (falling

edge) the pulsewidth counter is started. If the signal crosses

the triggerlevel again in the opposite direction within the

the programmed pulsewidth time, no trigger will be detect-

ed. If the pulsewidth counter reaches the programmed

amount of samples, without the signal crossing the trigger-

level in the opposite direction, the triggerevent will be de-

tected.

The pulsewidth trigger modes for long pulses can be used

to prevent the board from triggering on wrong (short) edges

in noisy signals.

Register Value Direction set to Value

SPC_TRIGGERMODE 40000 r/w TM_CHANNEL 20040

SPC_TRIGGERMODE0 40200 r/w TM_CHXPOS_LP 10001

SPC_HIGHLEVEL0 42000 r/w Set it to the desired triggerlevel relatively to the channel’s input range. board dependant

SPC_PULSEWIDTH 44000 r/w Set to the desired pulsewidth in samples. 2 to 255

Register Value Direction set to Value

SPC_TRIGGERMODE 40000 r/w TM_CHANNEL 20040

SPC_TRIGGERMODE0 40200 r/w TM_CHXNEG_LP 10011

SPC_HIGHLEVEL0 42000 r/w Set it to the desired triggerlevel relatively to the channel’s input range. board dependant

SPC_PULSEWIDTH 44000 r/w Set to the desired pulsewidth in samples. 2 to 255

Contents

Main Page Page Page Page Introduction Preface General Information Different models of the MC.31xx series Page Additional options Digital inputs Extra I/O (Option -XMF) Starhub Timestamp The Spectrum type plate 12 MC.31xx Manual Hardware information Introduction Hardware information Block diagram Technical Data Introduction Hardware information (c) Spectrum GmbH 13 Dynamic Parameters Order information Hardware Installation System Requirements Warnings ESD Precautions Cooling Precautions Installing a board with digital inputs/outputs Installing a board with extra I/O (Option -XMF) Installing multiple boards synchronized by starhub Installing multiple synchronized boards Software Driver Installation Interrupt Sharing Windows 98 Page Windows 2000 Page Windows XP Page Windows NT Adding boards to the Windows NT driver Linux Overview Page Software Software Overview First Test with SBench C/C++ Driver Interface Header files Microsoft Visual C++ Borland C++ Builder Linux Gnu C Other Windows C/C++ compilers National Instruments LabWindows/CVI Page Delphi (Pascal) Programming Interface Type definition Include Driver Examples Page Visual Basic Programming Interface Include Driver Visual Basic Examples VBA for Excel Examples Page Programming the Board Register tables Programming examples Error handling Initialization Starting the automatic initialization routine PCI Register Hardware version Date of production Serial number Maximum possible sample rate Installed memory Used interrupt line Used type of driver Powerdown and reset Analog Inputs Channel Selection Important note on channels selection Channel rerouting Setting up the inputs Input ranges Input offset Overrange bit Input termination Automatical adjustment of the offset settings Page Standard acquisition modes General Information Programming Memory, Pre- and Posttrigger Starting without interrupt (classic mode) Starting with interrupt driven mode Data organization Sample format Reading out the data with SpcGetData Page FIFO Mode General Information Background FIFO Read Speed Limitations Programming Software Buffers Buffer processing FIFO mode Example FIFO acquisition mode Data organization Sample format Clock generation Internally generated sample rate Standard internal sample rate Using plain quartz without PLL External reference clock External clocking Direct external clock External clock with divider Trigger modes and appendant registers General Description Software trigger External TTL trigger Edge triggers Pulsewidth triggers Page Channel Trigger Overview of the channel trigger registers Triggerlevel Page Detailed description of the channel trigger modes Page Page Page Page Page Page Page Option Multiple Recording Recording modes Standard Mode FIFO Mode Trigger modes Resulting start delays Option Gated Sampling Recording modes Standard Mode FIFO Mode Trigger modes End of gate alignement Alignement samples per channel Resulting start delays Number of samples on gate signal Allowed trigger modes Example program Option Timestamp General information = Limits Timestamp modes Timestamp Status Reading out timestamp data Functions for accessing the data Data format Example programs Option Timestamp Example programs Standard acquisition mode Acquisition with Multiple Recording Option Extra I/O Digital I/Os Channel direction Transfer Data Analog Outputs Programming example Option Digital inputs Synchronization (Option) The different synchronization options Synchronization with option cascading Synchronization with option starhub The setup order for the different synchronization options Setup Order for use with standard (non FIFO) mode and equally clocked boards Page Page Setup synchronization for use with FIFO mode and equally clokked boards Page Additions for synchronizing different boards SumSampleRateNSampleRate=NActChPerModuleN SyncSpeed Page Additions for equal boards with different sample rates Resulting delays using different boards or speeds = ResultingDelay ClockMasterDelay ClockSlaveDelayN 100 MC.31xx Manual Appendix Error Codes Pin assignment of the multipin connector Extra I/O with external connector(Option -XMF) Option Digital inputs Pin assignment of the multipin cable