HP E1429A User Manual download pdf (Page 43)

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101

IOOUTPUTS(ADDR, "*RST;*CLS", 9);

}

/****************************************************************************/

void check_error(char *func_tion)

{

char into[161];

intlength = 160;

IOOUTPUTS(ADDR, "SYST:ERR?", 9); /* Query error register */

IOENTERS(ADDR, into, &length); /* Enter error message */

if (atoi(into) != 0) /* Determine if error is present */

/* If errors present, print and exit */

{

while (atoi(into) != 0)

{

printf("Error %s in function %s\n\n", into, func_tion);

IOOUTPUTS(ADDR, "SYST:ERR?", 9);

IOENTERS(ADDR, into, &length);

}

exit(1);

}

Querying

Command Settings

As you configure the digitizer it is often useful to determine command

settings programmatically. This can be done by adding a question mark (?)

at the end of any SCPI command header (except the MEASure command),

and then sending the command without parameters. The following programs

query the parameters of the CONFigure command. Assuming the

CONFigure command was executed as indicated in program CONF.C, the

following query response is returned:

"ARR (20),1.000000,0.000500,(@1)"

where:

(20) = reading count (size parameter)

1.000000 = expected value

0.000500 = reading resolution

(@1) = input port

Chapter 1 Getting Started 43

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