Spectrum Brands MI.20xx - page 61

Trigger modes and appendant registers External TTL trigger

(c) Spectrum GmbH 61

TTL pulsewidth trigger for long LOW pulses

This mode is for detecting LOW pulses of an external TTL signal

that are longer than a programmed pulsewidth. If the pulse is

shorter than the programmed pulsewidth, no trigger will be detec-

ted. The board will trigger on the first pulse matching the trigger

condition after starting the board. The next triggerevent will then

be detected, if the actual recording/replay has finished and the

board is armed and waiting for a trigger again.

TTL pulsewidth trigger for short LOW pulses

This mode is for detecting LOW pulses of an external TTL signal

that are shorter than a programmed pulsewidth. If the pulse is lon-

ger than the programmed pulsewidth, no trigger will be detected.

The board will trigger on the first pulse matching the trigger con-

dition after starting the board. The next triggerevent will then be

detected, if the actual recording/replay has finished and the

board is armed and waiting for a trigger again.

Register Value Direction Description

SPC_PULSEWIDTH 44000 r/w Sets the pulsewidth in samples. Values from 2 to 255 are allowed.

SPC_TRIGGERMODE 40000 r/w Sets the triggermode for the board.

TM_TTLLOW_LP 20011 Sets the trigger mode for external TTL trigger to detect LOW pulses that are longer than a programmed pulsewidth.

Register Value Direction Description

SPC_PULSEWIDTH 44000 r/w Sets the pulsewidth in samples. Values from 2 to 255 are allowed.

SPC_TRIGGERMODE 40000 r/w Sets the triggermode for the board.

TM_TTLLOW_SP 20012 Sets the trigger mode for external TTL trigger to detect LOW pulses that are shorter than a programmed pulsewidth.

SpcSetParam (hDrv, SPC_TRIGGERMODE, TM_TTLHIGH_LP); // Setting up external TTL trigger to detect high pulses

SpcSetParam (hDrv, SPC_PULSEWIDTH , 50 ); // that are longer than 50 samples.

Contents

Main Page Page Page Page Introduction Preface General Information Different models of the MI.20xx series Additional options Extra I/O (Option -XMF) Extra I/O (Option -XIO) Starhub Timestamp The Spectrum type plate Introduction Hardware information (c) Spectrum GmbH 11 Hardware information Block diagram Technical Data 12 MI.20xx Manual Hardware information Introduction 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++ Linux Gnu C Other Windows C/C++ compilers National Instruments LabWindows/CVI Page 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 Installed features and options Used interrupt line Used type of driver Powerdown and reset Analog Inputs Channel Selection Important note on channels selection Setting up the inputs Input ranges Input offset Input termination Automatical adjustment of the offset settings 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 with no PLL External reference clock External clocking Direct external clock Page 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 Trigger modes Option Multiple Recording Resulting start delays Option Gated Sampling Recording modes Standard Mode FIFO Mode Trigger modes Allowed trigger modes Example program Option Timestamp General information Timestamp modes Standard mode StartReset mode Timestamp Status Reading out timestamp data Functions for accessing the data Data format Option Timestamp Example programs Example programs Standard acquisition mode Acquisition with Multiple Recording Option Extra I/O Digital I/Os Channel direction Transfer Data Analog Outputs Programming example 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 Page Setup synchronization for use with FIFO mode and equally clocked 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 94 MI.20xx Manual Appendix Error Codes Pin assignment of the multipin connector Extra I/O with external connector(Option -XMF) Pin assignment of the multipin cable Pin assignment of the internal multipin connector Extra I/O with internal connector (Option -XIO)