Operator`s manual

Signametrics 52

Negativ

ample

MArm

e( ! DMMReady(0));

i=0; i < 64 ; i++)

DMMReadBuffer(0, &Buffer[i]);

DMMArmTrigger

M2042 ;

Description

on are

Parame

DMM_OKAY

Operation successfully terminated

Error code.

e value

ouble

Ex d Buffer[64];

DM AnalogTrigger(0,64,1.5);

whil

for(

j =

SM2040 ; S SM2044 ;

Arm DMM for external trigger operation.

#include "sm204032.h"

int DMMArmTrigger(int nDmm, int iSamples)

Remarks Setup the SM2040 for external hardware trigger operation. Following reception of th

command the DMM enters a wait state. On acceptance of a positive edge at the hardware

trigger inputs (DIN7 connector), the DMM makes iSamples readings at the set function

range, and reading rate; and stores them in an internal buffer. No autoranging is allowe

for external trigger operation. Between the time the DMMArmTrigger is issued and the

time the buffer is read, no other command should be sent to the DMM. An excepti

the DMMReady and DMMDisarmTrigger commands. This function is usable for

VDC, VAC, Ohms, IAC, RTD and IDC.

Use the DMMReady to monitor when the DMM is ready (following trigger and the

reading of iSamples). When ready, you can read up to iSamples, using

DMMReadBuffer or DMMReadBufferStr functions. Once DMMReady returns

TRUE, it should not be used again prior to reading the buffer, since it prepares the buffer

for reading when it detects a ready condition.

ter Type/Description

nDmm

t Identifies the DMM. DMMs are numbered starting with zero.

samples the DMM takes following a trigger pulse.

iSamples

int The number of

This number must be between 1 and 64, inclusive.